Schneider Electric IndustrieS NX2TO7 Control Units User Manual Micrologic X Control Unit User Guide 05 2016

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Document Title	Micrologic X - Control Unit - User Guide - 05/2016
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Document Author:	Schneider Electric

Micrologic X
DOCA0102EN-00 05/2016
Micrologic X
Control Unit
User Guide
DOCA0102EN-00
05/2016
www.schneider-electric.com
The information provided in this documentation contains general descriptions and/or technical characteristics of the performance of the products contained herein. This documentation is not intended as a
substitute for and is not to be used for determining suitability or reliability of these products for specific user
applications. It is the duty of any such user or integrator to perform the appropriate and complete risk
analysis, evaluation and testing of the products with respect to the relevant specific application or use
thereof. Neither Schneider Electric nor any of its affiliates or subsidiaries shall be responsible or liable for
misuse of the information contained herein. If you have any suggestions for improvements or amendments
or have found errors in this publication, please notify us.
No part of this document may be reproduced in any form or by any means, electronic or mechanical,
including photocopying, without express written permission of Schneider Electric.
All pertinent state, regional, and local safety regulations must be observed when installing and using this
product. For reasons of safety and to help ensure compliance with documented system data, only the
manufacturer should perform repairs to components.
When devices are used for applications with technical safety requirements, the relevant instructions must
be followed.
Failure to use Schneider Electric software or approved software with our hardware products may result in
injury, harm, or improper operating results.
Failure to observe this information can result in injury or equipment damage.
© 2016 Schneider Electric. All rights reserved.
DOCA0102EN-00 05/2016
Table of Contents
Safety Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
About the Book . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1 Introduction to the Micrologic X Control Unit . . . . . . . . . . . . . . . . . . . . . . .
Presentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The Range of Micrologic X Control Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Micrologic X Control Unit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Masterpact MTZ Mobile App . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ecoreach Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Digital Modules for Micrologic X Control Units . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Micrologic X Control Units in Digital Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Go2SE Landing Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GoDigital . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing and Removing Optional Digital Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Micrologic X Date and Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Micrologic X Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 2 Using Micrologic X Control Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Presentation of HMIs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Micrologic X HMIs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functions per HMI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Using the Micrologic X HMI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Micrologic X HMI Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HMI Display Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Quick View Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tree Navigation Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Measures Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alarms & History Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Protection Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pop-up Event Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 3 Protection Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Distribution Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Standard Protection Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Long-Time Overcurrent Protection (L or ANSI Code 49RMS). . . . . . . . . . . . . . . . . . . . . . . .
Short-Time Overcurrent Protection (S or ANSI Code 51) . . . . . . . . . . . . . . . . . . . . . . . . . . .
Instantaneous Overcurrent Protection (I or ANSI Code 50) . . . . . . . . . . . . . . . . . . . . . . . . .
Ground-Fault Protection (G or ANSI Code 50G/51G) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Earth-Leakage Protection (ANSI Code 50G/51G). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Neutral Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dual Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Zone Selective Interlocking (ZSI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Setting Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Protection Setting Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the Long-Time Overcurrent Protection (L or ANSI Code 49RMS) . . . . . . . . . . . . . .
Setting the Short-Time Overcurrent Protection (S or ANSI Code 51) . . . . . . . . . . . . . . . . . .
Setting the Instantaneous Overcurrent Protection (I or ANSI Code 50) . . . . . . . . . . . . . . . .
Selectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Chapter 4 Metering Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1
4.2
Standard Metering Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Measurement Accuracy in Accordance with IEC 61557-12 . . . . . . . . . . . . . . . . . . . . . . . . . .
Measurement Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Measurement Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Network Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Real-Time Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Metering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Calculation Algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Energy Metering. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Harmonic Currents and Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Quality Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Factor PF and cos ϕ Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Metering Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Energy per Phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 5 Diagnostic and Maintenance Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1
5.2
5.3
Maintenance Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance Schedule. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Breaker Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard Diagnostic Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Health Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Breaker Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Monitoring the Tripping Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Monitoring the Opening/Closing Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Monitoring the Contact State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Monitoring the Internal Functioning of the Micrologic X control unit. . . . . . . . . . . . . . . . . . . .
Monitoring the ULP Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Monitoring the Circuit Breaker Service Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Diagnostic Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Restoration Assistant Digital Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Masterpact Operation Assistant Digital Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Waveform Capture on Trip Event Digital Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 6 Operation Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Closing Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Opening Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 7 Communication Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bluetooth Low Energy Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NFC Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IEEE 802.15.4 Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
USB Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cybersecurity Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 8 Event Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Event Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Event Status Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Event Notifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Event Status Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Event History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Event List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix A Title of Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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163
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169
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177
179
DOCA0102EN-00 05/2016
Safety Information
Important Information
NOTICE
Read these instructions carefully, and look at the equipment to become familiar with the device before
trying to install, operate, service, or maintain it. The following special messages may appear throughout
this documentation or on the equipment to warn of potential hazards or to call attention to information that
clarifies or simplifies a procedure.
PLEASE NOTE
Electrical equipment should be installed, operated, serviced, and maintained only by qualified personnel.
No responsibility is assumed by Schneider Electric for any consequences arising out of the use of this
material.
A qualified person is one who has skills and knowledge related to the construction and operation of
electrical equipment and its installation, and has received safety training to recognize and avoid the
hazards involved.
DOCA0102EN-00 05/2016
6
DOCA0102EN-00 05/2016
About the Book
At a Glance
Document Scope
The aim of this guide is to provide users, installers, and maintenance personnel with the technical
information needed to operate Micrologic™ X control units in Masterpact™ MTZ circuit breakers.
Validity Note
This guide applies to the following control units:
 Micrologic 2.0 X
 Micrologic 5.0 X
 Micrologic 6.0 X
 Micrologic 7.0 X
Related Documents
Title of Documentation
Reference Number
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DOCA0100EN
DOCA0100ES
DOCA0100FR
DOCA0100ZH
Masterpact MTZ2/MTZ3 Circuit Breakers and Switch-Disconnectors
- User Guide
DOCA0101EN
DOCA0101ES
DOCA0101FR
DOCA0101ZH
Masterpact MTZ - Modbus Communication Guide
DOCA0105EN
DOCA0105ES
DOCA0105FR
DOCA0105ZH
Masterpact MTZ Cyber Security Guide
DOCA0122EN
IO Input/Output Application Module for One Circuit Breaker User
Guide
DOCA0055EN
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DOCA0055ES
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IFE Ethernet Interface User Guide
DOCA0084EN
DOCA0084FR
DOCA0084ES
DOCA0084ZH
EIFE Embedded Ethernet Interface User Guide
DOCA0106EN
You can download these technical publications and other technical information from our website at
http://download.schneider-electric.com
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All trademarks are owned by Schneider Electric Industries SAS or its affiliated companies.
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This product includes cryptographic software written by Eric Young (eay@cryptsoft.com).
DOCA0102EN-00 05/2016
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AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit
(http://www.openssl.org/).
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Copyright © 2010 Texas Instruments Incorporated (http://www.ti.com/).
This product includes software developed by Texas Instruments Incorporated (http://www.ti.com/).
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
DOCA0102EN-00 05/2016
Micrologic X
Introduction to the Micrologic X Control Unit
DOCA0102EN-00 05/2016
Chapter 1
Introduction to the Micrologic X Control Unit
Introduction to the Micrologic X Control Unit
What Is in This Chapter?
This chapter contains the following topics:
Topic
DOCA0102EN-00 05/2016
Page
Presentation
10
The Range of Micrologic X Control Units
11
Micrologic X Control Unit Description
12
Masterpact MTZ Mobile App
15
Ecoreach Software
16
Optional Digital Modules for Micrologic X Control Units
17
Micrologic X Control Units in Digital Systems
18
Go2SE Landing Page
19
GoDigital
20
Installing and Removing Optional Digital Modules
21
Micrologic X Date and Time
22
Micrologic X Power Supply
23
Introduction to the Micrologic X Control Unit
Presentation
Micrologic X Control Unit Overview
Masterpact MTZ circuit breakers with Micrologic X control units provide functions of protection, metering,
diagnostics, communication and remote operation. The control unit can be customized with optional Digital
Modules.
Micrologic X control units allow operation and monitoring of Masterpact MTZ circuit breakers locally or
remotely.
Protection
In addition to the standard range of protection (long-time overcurrent (L), short-time overcurrent (S),
instantaneous overcurrent (I), ground-fault (G), and earth-leakage (V)), additional features include:
 Dual settings
 Fine settings
 Zone selective interlocking
 Fast tripping
Metering
Micrologic X control units measure the following parameters:
 Current
 Voltage
 Frequency
 Power
 Energy
 Power factor
 Minimum, maximum, and average values of a wide range of parameters are available.
Diagnostics and Maintenance
Diagnostic features help to:
 Start the circuit breaker again after a trip as quickly as possible.
 Limit the risk of power interruptions by monitoring the health of the Micrologic X control unit. Pop-up
messages alert the user in the case of necessary preventive maintenance.
Communication
Micrologic X control units support the following means of communication:
Wireless
 Bluetooth
 NFC


Ethernet
 Through IFE webpages
 Through embedded EIFE, with associated webpages (drawout devices only)

Local through connection to mini USB port
Wireless communication allows you to access status and measurements readings directly on a
smartphone using the Masterpact MTZ mobile App available to download and install.
Optional Digital Modules
The following Digital Modules can be downloaded from the Schneider Electric website to extend the
features available:
 Energy per phase
 Power restoration assistant
 Masterpact operation assistant
 Waveform capture on trip event
10
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Introduction to the Micrologic X Control Unit
The Range of Micrologic X Control Units
Micrologic X Control Units
The range of Micrologic X control units offers different standard functions, described below.
Optional Digital Modules can be added to extend the functions available (see page 17).
Presentation of Standard Functions
The following table indicates the standard features available on Masterpact MTZ with Micrologic X control
units:
Long-time overcurrent protection (L)
DOCA0102EN-00 05/2016
Micrologic 2.0 X
Micrologic 5.0 X
Micrologic 6.0 X
Micrologic 7.0 X
Short-time overcurrent protection (S)
–
Instantaneous overcurrent protection (I)
Ground-fault protection (G)
–
–
–
Earth-leakage protection (V)
–
–
–
Neutral protection
Dual settings
Overcurrent and trip cause indicators
Zone selective interlocking
–
Trip history
Setting change traceability
Embedded power meter
Embedded diagnostics
11
Introduction to the Micrologic X Control Unit
Micrologic X Control Unit Description
Introduction
The Micrologic X control unit includes:
 Micrologic X health status LEDs
 A local HMI comprising a graphic display with colored backlight, contextual buttons, and dedicated
buttons
 LEDs to monitor circuit breaker operations, including the source of trips and alarms
Control Unit Description
Home
Quickview
Measures
Alarms & H...
Maintenan...
OK
TRIP CAUSE
Ir
Isd
Ii
Ig
I n
Op.
Test Reset
6.0 X
ID:
1989421527520002LV847604
Ready LED
Service LED
ERMS LED (Reserved for future use)
Graphic display screen
Escape button ESC
Three contextual buttons
Home button
NFC wireless communication zone
Bluetooth LED
Bluetooth activation button
Test button for ground-fault and earth-leakage
protection (Micrologic 6.0 X and 7.0 X)
L Test/Reset button for trip cause LEDs and alarms
M Mini USB port under rubber cover
N Overload and trip cause LEDs
O Cover for battery
P VPS voltage power supply module (optional)
Q VPS LED to indicate that the VPS is supplying the
control unit
R QR code to product information
S Control unit identification number
T Control unit type
U Sensor plug with the rated current of the circuit
breaker
DISCONNECT BEFORE
DIELECTRIC TEST
In 1600 A
U T
Micrologic X Health Status LEDs
LED
Description
Ready
The Ready LED flashes when the control unit is ready to provide protection.
The service LED alerts the user to the overall health of the circuit breaker. There are three states:
 Unlit LED: the circuit breaker is in good working order.
 Orange LED: Non-urgent alert message.
 Red LED: Alert message that requires immediate intervention.
ERMS
The ERMS (Energy Reduction Maintenance Setting) LED is reserved for future use.
Local HMI Display Screen with Contextual Buttons and Dedicated Buttons
The local HMI screen and buttons (see page 32) are used to:
 Navigate the menu structure.
 Display monitored values.
 Access and edit configuration settings.
12
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Introduction to the Micrologic X Control Unit
NFC Communication Zone
The NFC communication zone is used to establish an NFC connection (see page 156) between a
smartphone that has the Masterpact MTZ mobile App and the Micrologic X control unit. When the
connection is established, the circuit breaker operating data is automatically uploaded to the smartphone.
Bluetooth Activation Button and LED
The Bluetooth activation button is used to establish a Bluetooth Low Energy connection (see page 154)
between a smartphone that has the Masterpact MTZ mobile App and the Micrologic X control unit. When
the connection is established, the circuit breaker can be monitored and controlled from the smartphone.
When the Bluetooth LED is flashing, it indicates that a Bluetooth connection is in progress.
Test Button
The test button is used to test the ground-fault protection for Micrologic 6.0 X (see page 73) and the earthleakage protection for Micrologic 7.0 X (see page 74).
Overload and Trip Cause LEDs
The assignment of the four trip cause LEDs depends on the type of Micrologic X control unit.
LEDs
Description
TRIP CAUSE
Isd
Ii
Ig Op.
I n
TRIP CAUSE
Ir
Isd
Ii
Ig Op.
I n
TRIP CAUSE
Ir
Isd
Ii
Ig Op.
I n
TRIP CAUSE
Ir
Isd
Ii
Ig Op.
I n
TRIP CAUSE
Ir
Isd
Ii
Ig Op.
I n
TRIP CAUSE
 Micrologic 2.0 X, 5.0 X, 6.0 X, 7.0 X: Overload pre-alarm, the load exceeds 90% of
Ir
Ir
Isd
Ii
Ig Op.
I n
the Ir setting of the long-time protection
 Micrologic 2.0 X, 5.0 X, 6.0 X, 7.0 X: Overload alarm, the load exceeds 105% of the
Ir setting of the long-time protection
 Micrologic 2.0 X, 5.0 X, 6.0 X, 7.0 X: trip due to the long-time protection.
 Micrologic 2.0 X: trip due to the short-time protection.
 Micrologic 5.0 X, 6.0 X, 7.0 X: trip due to the short-time protection or instantaneous
protection.
 Micrologic 2.0 X, 5.0 X: Not used.
 Micrologic 6.0 X: trip due to the ground-fault protection.
 Micrologic 7.0 X: trip due to the earth-leakage protection.
 Micrologic 2.0 X, 5.0 X, 6.0 X, 7.0 X: Trip due to other protection (optional
protections).
NOTE: If the Micrologic X control unit is not powered the trip cause LEDs go off after 4 hours. Press the
Test/Reset button to light them again.
Test/Reset Button
The Test/Reset button performs the following functions:
 Battery test. Press theTest/Reset button. The four trip cause LEDs light up for 1 second. If the LEDs do
not light, replace the battery.
 Reset trip cause LED. When a trip cause LED is lit, press and hold the Test/Reset button for 3 seconds
to reset and switch off the trip cause LED and the service LED.
 Reset the control unit (except standard protection functions). Press and hold the Test/Reset button for
15 seconds.
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13
Introduction to the Micrologic X Control Unit
NOTE: After a battery test, any active trip cause LED is displayed again.
Mini USB Port
Remove the rubber cover of the mini USB port to connect the following devices:
 A Mobile Power Pack to supply power to the Micrologic X control unit (see page 23)
 A PC equipped with Ecoreach software (see page 159).
NOTE: It is not possible to connect a USB key to the Micrologic X control unit.
QR Code
When the QR code on the front face of a Micrologic X control unit is flashed by using a smartphone running
a QR code reader, a landing page is displayed.
The landing page displays some basic information about the device in a header, and a list of menus:
Characteristics
 Download documents related to Masterpact and Micrologic X devices
 Customer Care Center
 Safe Repository
 Masterpact MTZ mobile App
 GoDigital

Control Unit Identification Number
The identification number is made up as follows:
 The serial number of the Micrologic X control unit in the format FFFFFFYYWWDXXXXX
 The sales reference of the control unit in the format LV8xxxxx
Use the identification number to register your Micrologic X control unit.
Registering your Micrologic X control unit ensures that your records are up to date and enables traceability.
Control Unit Type
This code denotes the type of Micrologic control unit:
The number (for example, 2.0) defines the types of protection provided by the control unit.
 The letter (X) denotes the range.

Battery
The battery powers the trip cause LEDs in the absence of other power supply (see page 25).
VPS
The VPS power supply module provides an internal voltage supply to the Micrologic X control unit
(see page 23).
The VPS module is optional for Micrologic 2.0 X, 5.0 X and 6.0 X.
The VPS module is supplied as standard for Micrologic 7.0 X.
Sensor Plug
The protection ranges depend on the rated current In, defined by the sensor plug inserted into the
Micrologic X control unit (see page 60).
14
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Introduction to the Micrologic X Control Unit
Masterpact MTZ Mobile App
Presentation
The Masterpact MTZ mobile App enables a smartphone to be used for rapid setting changes and a followup of Masterpact MTZ circuit breakers with Micrologic X control units. It also enables information to be
shared, (for example, by email).
Downloading the Application
The Masterpact MTZ mobile App can be downloaded in the following ways:
 Flashing the QR code on the front face of the Micrologic X control unit gives access to a landing page
where the mobile application is proposed (see page 19)
 From Google Play Store for Android smartphones
 From App Store for iOS smartphones
The Masterpact MTZ mobile App is optimized for a 12.7 cm (5 inch) display screen.
Communicating with a Micrologic X Control Unit
Two means of communication are available to connect the Masterpact MTZ mobile App to a Micrologic X
control unit:
 Bluetooth:
 Display data
 Configure general and protection settings

NFC (also available when control unit is not powered) (only available for Android smartphones):
 Display selection of data
Establishing a Connection with a Micrologic X Control Unit
For the connection procedure refer to the specific topic:
 Bluetooth connection procedure (see page 154)
 NFC connection procedure (see page 156)
Using a Bluetooth Connection
Connecting to Masterpact MTZ mobile App with a Bluetooth connection gives access to and allows sharing
of the following information types:
 Quick View: gives an overview of current levels per phase, the health of the circuit breaker, and recent
event history
 Metering: displays values of current, rms voltages, network and energy in real-time
 Protection Setting: displays settings currently selected and allows modification of settings
 Status and Control: displays status of the circuit breaker and allows opening and closing operations to
be carried out.
Using an NFC Connection
Connecting to Masterpact MTZ mobile App with an NFC connection is possible when the Micrologic X
control unit is not powered. It gives access to the following information:
 Information about the Micrologic X control unit
 Last trip context: trip type; date and time of last trip; current values before trip
 Protection settings (display only)
 Access to Digital Modules (see page 17) for assistance after a trip
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15
Introduction to the Micrologic X Control Unit
Ecoreach Software
Presentation
Ecoreach is an electrical asset management software package intended to assist with the designing,
testing, commissioning and maintenance phases of a project. It provides a simple way to configure, test
and commission electrical smart devices.
Ecoreach automatically discovers smart devices and allows them to be added for easy configuration.
Comprehensive reports can be generated as part of Factory Acceptance Test and Site Acceptance Test
reports to replace heavy manual work. Additionally, when the panels are under operation, any change of
settings made can be easily identified to provide system consistency during the operation and
maintenance phases.
Ecoreach software enables the configuration of Masterpact devices:
 Micrologic X control unit
 Communication interface modules: IFE interface and EIFE interface
 ULP IO modules
 M2C output module
For more information, refer to the Ecoreach Online Help.
The Ecoreach software is available at www.schneider-electric.com.
Key Features
Ecoreach performs the following actions for the supported devices and modules:
 Create projects by device discovery
 Perform communication wiring test on entire project, generate and print test reports
 Configuration or settings download and upload for multiple devices
 Install digital modules
 Compare settings between project (original settings) and device (current settings)
 Generate comprehensive project reports
 Check system-level firmware status and upgrade devices
 Provide safe repository of projects in Ecoreach Cloud
 Read information (alarms, measurements, parameters) and display diagnosis information
 Export logbook of events and waveform capture
16
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Introduction to the Micrologic X Control Unit
Optional Digital Modules for Micrologic X Control Units
Presentation
Digital Modules are optional modules that extend the features available across the range of Micrologic X
control units.
They are available to purchase:
 When the Micrologic X control unit is initially ordered
 At any time after installation of the circuit breaker and Micrologic X control unit, by accessing the
GoDigital marketplace
Digital Modules can be purchased, downloaded and installed on a Micrologic X control unit without
interrupting the services of the functions provided by the control unit.
Take the following steps to purchase and install optional Digital Modules:
 Access GoDigital (see page 20)
 Choose Digital Modules for your control unit and purchase them
 Open the email and click the link to download the Digital Module delivery package to your PC
 Connect Ecoreach software to your Micrologic X control unit to install your Digital Module (see page 21)
Digital Modules
The following table presents the Digital Modules available for installation:
Digital Module
Description
Energy per phase
Analysis of energy consumption per phase.
Metering
Power restoration assistant
Assistance in restoring power quickly after a trip.
Diagnostics
Masterpact operation
assistant (see page 146)
Assistance in closing the circuit breaker after a trip.
Diagnostics
Waveform capture on trip
event (see page 147)
Displays interrupted phase and neutral currents
after a trip.
Diagnostics
(see page 129)
(see page 145)
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Function
17
Introduction to the Micrologic X Control Unit
Micrologic X Control Units in Digital Systems
Presentation
Masterpact circuit breakers with Micrologic X control unit, in conjunction with Enerlin’X, provide simple and
reliable access to data from a smart panel or PC.
The following communication channels are offered:
 Ethernet through IFE or EIFE
 Masterpact MTZ mobile App through Bluetooth or NFC
 Ecoreach software through USB port
 Internet through Com’X through Ethernet
Micrologic X Control Units in Digital Systems
The following diagram shows how Micrologic X control units communicate within a digital system:
Internet
POW
ER
30V
100-2 ER
POW
ER
POW
’X 200
Com
Ethernet
USB
Wireless communication
18
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Introduction to the Micrologic X Control Unit
Go2SE Landing Page
Presentation
When the QR code on the front face of a Micrologic X control unit is flashed by using a smartphone running
a QR code reader, a landing page is displayed. The landing page displays some basic information about
the device in a header and a list of menus.
Header
The header displays the following information:
 The product reference of the Micrologic X control unit
 The type of control unit
 The range of associated circuit breaker
 The unique serial number of the Micrologic X control unit
Landing Page Menus
The landing page displays the following list of menus:
 Characteristics
 Download documents related to Masterpact and
Micrologic X devices
 Customer Care Center
 Safe Repository
 Masterpact MTZ mobile App
 GoDigital
Characteristics
Selecting this menu gives access to a product datasheet which gives detailed information about the
product.
Download Documents
Selecting this menu gives access to the following documents:



Micrologic X Control Unit - User Guide
Masterpact MTZ1 Circuit Breakers and Switch-Disconnectors - User Guide
Masterpact MTZ2/MTZ3 Circuit Breakers and Switch-Disconnectors - User Guide
Download Customer Care Application
The customer care application for Android smartphones can be downloaded by following the link.
Safe Repository Access
Download Masterpact MTZ mobile App
Selecting this menu gives access to the smartphone application or the possibility to purchase/install it.
GoDigital
Selecting this menu gives direct access to the GoDigital marketplace webpage (see page 20).
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19
Introduction to the Micrologic X Control Unit
GoDigital
GoDigital Marketplace
GoDigital is a marketplace to enable users to purchase and download Digital Modules to extend the
performance of Micrologic X control units.
Prerequisites
The following list indicates the necessary prerequisites for purchasing optional Digital Modules:
 Unique Schneider Electric account with user name and password
 Validated CRM internal user account to enable purchase of Digital Modules
 Creation of a buyer account in GoDigital
 Connection to a single Micrologic X control unit to read its unique serial number (see below)
Accessing GoDigital
You can access GoDigital using one of the following means:
 From Ecoreach software either with a PC connected to a Micrologic X control unit or by selecting one
Micrologic X control unit (or project) from the software. Ecoreach reads the unique serial number of the
Micrologic X control unit, proposes available Digital Modules and gives direct access to the GoDigital
site.
 Through the Masterpact MTZ mobile App, after connection to one Micrologic X control unit through
Bluetooth or NFC. A direct link gives access to the GoDigital webpage for mobile devices.
 By flashing the QR code on the front face of the Micrologic X control unit from a smartphone. A landing
page opens and a direct link to GoDigital is proposed.
 Directly to the GoDigital website ( http://godigital.schneider-electric.com/). This access can only be used
to purchase Digital Modules for a second order for the same Micrologic X control unit using the serial
number listed in the My Asset tab.
Purchasing in GoDigital
After accessing the GoDigital website through one of the access points described in the previous
paragraph, follow this procedure to purchase Digital Modules:
Step
Action
Log in to the GoDigital website
NOTE: If user is unknown, a link to create a new account is proposed. If the user is recognized but no
buyer account exists in GoDigital, a link to create this account is proposed.
Choose Digital Modules required and add to cart. The cart can be saved for future validation and
purchase.
Submit the cart. The purchase is validated and the invoice, order confirmation and a link to the delivery
package are sent by email.
Click the link in the email to download the delivery package to a PC.
Useful Information
The following points provide additional information on the use of GoDigital:
In Ecoreach software, Digital Modules can be selected from a list available for the unique serial number
of the selected Micrologic X control unit. Clicking on Buy gives direct access to the list of Digital Modules
in the GoDigital marketplace. The Digital Modules selected in Ecoreach are already checked.
 To buy Digital Modules for more than one Micrologic X control unit, save the cart, select the serial
number of another control unit, and repeat step 2 in the procedure.

20
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Introduction to the Micrologic X Control Unit
Installing and Removing Optional Digital Modules
Presentation
Once a Digital Module has been purchased in the GoDigital marketplace it can be installed in the
associated Micrologic X control unit using Ecoreach software.
Prerequisites
The following conditions must be met to install a Digital Module:
 The Digital Module purchased in the GoDigital marketplace
 The Digital Module delivery package downloaded onto a PC
 The PC with Ecoreach software connected by a USB cable to the Micrologic X control unit to recognize
its serial number and ID
Installing a Digital Module
Follow this procedure to install purchased Digital Modules on a Micrologic X control unit:
Step
Action
Connect a PC running Ecoreach software directly to the mini USB port on the front of the Micrologic X
control unit.
Click the Connect device button to establish a connection between Ecoreach and the Micrologic X
control unit. Ecoreach displays the Micrologic X control unit serial number on the screen.
Select Digital Modules.
Check that the delivery package for the Digital Module to be installed is present on the PC being used.
Choose Digital Modules to be installed by clicking Install.
NOTE: Only modules that have been purchased previously can be installed directly by clicking Install.
When installation is completed and before unplugging the PC, disconnect Ecoreach from the device by
clicking the Disconnect button.
Removing a Digital Module
Follow this procedure to remove a Digital Module from a Micrologic X control unit:
Step
Action
Connect a PC running Ecoreach software directly to the mini USB port on the front of the Micrologic X
control unit.
Click the Connect device button to establish a connection between Ecoreach and the Micrologic X
control unit. Ecoreach displays the Micrologic X control unit serial number on the screen.
Select Digital Modules.
Choose Digital Modules to be removed by clicking Remove.
When removal is completed and before unplugging the PC, disconnect Ecoreach from the device by
clicking the Disconnect button.
Predefined Events
The following events are generated when a Digital Module is installed or removed:
DOCA0102EN-00 05/2016
User message
History
Severity
License installed
Configuration
Low
License uninstalled
Configuration
Low
21
Introduction to the Micrologic X Control Unit
Micrologic X Date and Time
Presentation
Micrologic X date and time are used for time stamping events to provide a temporal order.
Setting the Date and Time Manually
Micrologic X date and time can be set manually:
 On Micrologic X display screen at Home → Configuration → General → Date & Time. The first
component of the date is day (dd) and the second component is month (mm).
 With Ecoreach software
 With Masterpact MTZ mobile App
Synchronizing the Date and Time Automatically
Micrologic X date and time can be automatically synchronized with the date and time of a smartphone,
using the Masterpact MTZ mobile App.
Micrologic X date and time can be automatically updated with the IFE or EIFE Ethernet interface with the
following conditions:
 Ethernet interface is configured in SNTP mode
 Ethernet interface receives an update date and time request (from Ecoreach software or a web browser
connected to the Ethernet interface webpage or third-party software)
NOTE: If the Micrologic X control unit is connected to an Ethernet interface configured in SNTP mode,
manual update of the Micrologic X date and time is possible but is immediately replaced by the date and
time of the IFE Ethernet interface.
Predefined Events
Setting the date and time generates the following low-severity event, which is logged in the Configuration
history: Clock setup
22
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Introduction to the Micrologic X Control Unit
Micrologic X Power Supply
Internal and External Power Supplies
The Micrologic X control unit is powered by the current through internal current transformers (CT). Different
optional power supplies can also be used. The following list indicates the possible permanent power
supplies:
 Internal voltage power supply (VPS) module, up to 600 Vac
 External 24 Vdc power supply module with or without battery module (battery life 4 hours)
The following temporary power supplies can be used to power the control unit when other supplies are
unavailable. They provide access to all functions of the Micrologic X control unit:
 PC through USB connection
 External Mobile Power Pack through USB connection
During operation, when the load current is higher than 20% of the rated current, the internal current supply
ensures full functioning of the control unit and all protection functions, including long-time overcurrent
protection, short-time overcurrent protection, instantaneous overcurrent protection, and ground-fault
protection.
When the circuit breaker is not powered, an alternative power supply is necessary. More details are given
in the following presentation of each power supply.
An external 24 Vdc power supply is necessary to power IFE and EIFE Ethernet interfaces, and IO modules
(ULP).
Voltage Power Supply (VPS) Module
The VPS module is optional for Micrologic 2.0 X, 5.0 X, and 6.0 X. It is installed as standard on
Micrologic 7.0 X to maintain earth-leakage protection.
The internal voltage power supply (VPS) module for Micrologic X control unit powers the
main functions of the control unit, including the display screen, keypad, and wireless
communication, in the following circumstances:
 When the circuit breaker is in low load conditions (< 20% In)
 When there is no load but the circuit breaker is supplied with power, for example, there
is a tri-phase or bi-phase power voltage available downstream of the circuit breaker
The VPS module is installed in the lower part of the Micrologic X control unit.
A green LED on the front face indicates that the VPS module is powered and a 24 Vdc output is supplied.
Characteristics of the VPS module:
DOCA0102EN-00 05/2016
Power supply
Values
Input Vac 50/60 Hz
Three phase 208–600 V
+10 / –30%
23
Introduction to the Micrologic X Control Unit
External 24 Vdc Power Supply (ABL8) Module
External 24 Vdc Power Supply (AD) Module
The 24 Vdc power supply module (with or without battery module) maintains the operation
of all functions of the Micrologic X control unit when the circuit breaker is open and not
energized.
The 24 Vdc power supply module maintains the functions of the Micrologic X control unit in
low load conditions (load below 20%).
The 24 Vdc power supply module provides a power supply during periods of setting,
commissioning, testing, and maintenance.
The 24 Vdc power supply module is mandatory to supply power to the IFE/EIFE Ethernet
interfaces and IO modules, when these are present.
Characteristics of the AD module:
Characteristic
Values
Power supply
110/130, 200/240, 380/415 Vac, 50/60 Hz (+10%, –15%)
24/30, 48/60, 100/125 Vdc (+20% –20%)
Output voltage
24/30, 48/60, 100/125 Vdc (+20% -20%)
Ripple
< 1%
Dielectric withstand
3.5 kV rms between input/output, for 1 minute
Overvoltage category
Defined by IEC 60947-1 cat. 4
Battery Module
The battery module maintains the operation of the Micrologic X display screen and keypad if the
power supply is interrupted. It also enables wireless communication. It is installed in series
between the control unit and the 24 Vdc power supply module.
The battery module is a lithium type battery, with a service life of approximately ten years. If there
is no power supply to the 24 Vdc power supply module, the battery module provides power to the
control unit for four hours.
Characteristics of the battery module:
Characteristic
Values
Battery run-time
4 hours
Mounting
Vertical backplate or symmetrical rail
PC Power Supply
A PC provides a temporary power supply which can be used when the circuit breaker is not powered, and
during periods of setting, commissioning, testing, and maintenance.
It is connected by using a USB cable connected to the mini USB port on the Micrologic X control unit.
24
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Introduction to the Micrologic X Control Unit
Mobile Power Pack
1A
1.5A
2.4A
5Vc
5Vc
5Vc
The Mobile Power Pack is an external battery that enables power to be
supplied temporarily to the Micrologic X control unit.
The Mobile Power Pack enables use of the Micrologic X display screen and
keypad for basic setting and displaying when the power supply to the
Micrologic X control unit is interrupted.
The external Mobile Power Pack can be connected by using a USB cable
connected to the mini USB port on the Micrologic X control unit.
Check the charge level of the Power Pack by pressing the test button for one second. The indicator on the
Power Pack lights up to indicate the remaining charge.
Internal Battery
When no other power supply is supplying the Micrologic X control unit, the internal battery powers:
 The trip cause LEDs
 The red service LED
 The Micrologic internal clock (date and time)
The internal battery of the Micrologic X control unit can be replaced on site when discharged.
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25
Introduction to the Micrologic X Control Unit
26
DOCA0102EN-00 05/2016
Micrologic X
Using Micrologic X Control Units
DOCA0102EN-00 05/2016
Chapter 2
Using Micrologic X Control Units
Using Micrologic X Control Units
What Is in This Chapter?
This chapter contains the following sections:
Section
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Topic
Page
2.1
Presentation of HMIs
28
2.2
Using the Micrologic X HMI
31
27
Using Micrologic X Control Units
Section 2.1
Presentation of HMIs
Presentation of HMIs
What Is in This Section?
This section contains the following topics:
Topic
28
Page
Micrologic X HMIs
29
Functions per HMI
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Micrologic X HMIs
Introduction
HMI from the following products can be used to communicate with the Micrologic X control unit:
 Micrologic X display screen
 Masterpact MTZ mobile App (Wireless NFC or Bluetooth)
 Ecoreach software (USB connection and remote LAN connection))
 FDM128
 Webpages on IFE/EIFE server
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Functions per HMI
Introduction
List of functions available according to the HMI:
 All features on Ecoreach software
 A wide selection of features on Masterpact MTZ mobile App
 Essential features on the Micrologic X display screen
 FDM128
 Webpages on IFE/EIFE server
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Section 2.2
Using the Micrologic X HMI
Using the Micrologic X HMI
What Is in This Section?
This section contains the following topics:
Topic
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Page
Micrologic X HMI Description
32
HMI Display Modes
34
Quick View Mode
35
Tree Navigation Mode
38
Measures Menu
45
Alarms & History Menu
50
Maintenance Menu
51
Configuration Menu
52
Protection Menu
54
Pop-up Event Messages
57
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Micrologic X HMI Description
Introduction
The human machine interface (HMI) of the Micrologic X control unit includes:
 A graphic display screen with colored backlight
 Buttons to navigate through the menu structure, and access monitored parameters and configuration
settings
Display Screen and Buttons
The Micrologic X control unit includes the following display screen with contextual and dedicated buttons:
Screen name
Functional screen content
Scroll bar indicating the relative position of the
items in a list larger than the display screen
Context-specific function icons
Contextual buttons that perform the contextspecific function described by the icon
immediately above each button
Escape button, used to return to the previous
screen and/or trigger a data saving confirmation
screen
Home button, used to jump to the Home screen
and/or trigger a data saving confirmation screen
Button Functional Types
Use the buttons beneath the display screen to:
 Navigate the menu structure
 Display monitored values
 Access and edit configuration settings
The control unit provides the following types of buttons:
Contextual buttons: each screen can have up to three contextual buttons. The function of each button
is determined by an icon located on the display screen directly above it.
 Dedicated buttons, that perform the escape and home functions.

Contextual Buttons
Icon displayed
Description
Use the up and down buttons to move between:
 Screen names within the same level of menu hierarchy
 List items
The up and down arrows do not support looping back. At a terminus of a menu structure or item
list, either the up or down arrow is no longer displayed (depending on whether the terminus is
the beginning or end of the list). The up and down navigation behavior is the same for all menus
and lists.
OK
Use the OK button:
 To validate a selection
 To navigate from the level currently displayed in the hierarchy to the selected sublevel
immediately below it. In this way, navigation is possible from:
 The active menu to the immediate submenu
 A submenu to a monitored item or configuration parameter
 A monitored item to its monitored value
 A configuration parameter to its configuration setting
 To view details and acknowledge an event pop-up screen or error code
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Icon displayed
Description
Use the Y (Yes) and N (No) buttons to acknowledge actions, for example, when a confirmation
screen is displayed.
–
Use the + and – buttons to increment or decrement a configuration setting, either numerical
values or predefined list items.
Icon displayed
Description
ESC
Use the ESC (escape) button to:
 Navigate from the level currently displayed in the hierarchy to the level immediately above
 Save a change to a configuration setting. A confirmation screen pops up and must be
acknowledged before returning to the menu on the level above.
Dedicated Buttons
Use the home button to:
 Return to the Home screen
 Save a change to a configuration setting. A confirmation screen pops up and must be
acknowledged before returning to the home screen.
Display Screen Backlight
The backlight color and intensity depends on the operating state of the control unit, as follows:
Backlight color
White
Control unit operating state
 Quick View scrolling is enabled and running
 Tree navigation mode is enabled for navigating among menus in display screens
 Bluetooth wireless communication is enabled and the Bluetooth pairing message is
displayed.
Red
A trip or a high severity event message is displayed.
Orange
A medium severity alarm message is displayed, and no trip or high severity alarm is active.
1 The backlight of the Health screen in Quick View is
 Red if a high severity event is active.
 Orange if a medium severity event is active.
NOTE: When Quick View scrolling is off, the backlight changes from high intensity to low intensity when in
standby. High intensity resumes when a button is pressed.
Display Screen Language
To change the display screen language go to:
Home → Configuration → General → Language
Selections include:
Deutsch
 English(US)
 Español
 Français
 Italiano





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Português
English(UK)
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HMI Display Modes
Presentation
The Micrologic X control unit HMI supports the following display modes:
 Quick View mode to display a selection of data
 Tree Navigation mode to access all data through a menu structure
NOTE: Both Quick View and Tree Navigation display modes are overridden by event messages
(see page 57).
Quick View Mode
Quick View is the default HMI display mode. It displays a selection of data screens.
When Quick View scrolling is enabled, the screens are displayed automatically one after the other with a
configurable time delay.
When Quick View scrolling is disabled the Quick View screens are viewable in the Quick View menu,
accessed from the Home menu.
Tree Navigation Mode
In Tree Navigation display mode, use the contextual buttons to navigate in the menu structure. Tree
Navigation display mode presents a single network of menus, with monitoring values and editable
configuration settings.
Tree navigation is always accessible from Quick View screens by pressing the Home button.
Refer to the Micrologic X local HMI description (see page 32) for information on how to use the HMI buttons
to:
 Navigate the menu structure
 Access and edit settings
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Quick View Mode
Quick View
Quick View presents a sequence of screens, depending on the type of Micrologic X control unit. Each
screen displays a snapshot of operating values for the control unit.
With automatic scrolling enabled, the screens are displayed in sequence with a configurable time delay.
With automatic scrolling disabled, the screens can be navigated manually.
Quick View scrolling is enabled as the factory setting.
When the Micrologic X control unit is switched on, Quick View scrolling begins after the configured timeout if there are no active event messages
Configure the Quick View display mode by setting:
 The display time for each screen in the Quick View scrolling sequence.
 The time delay for automatically resuming scrolling, after scrolling has been interrupted.
If scrolling is off, the current bar graph is displayed after this time delay.
The following is an example of the Quick View screens for the Micrologic 6.0 X control unit, with dual
settings disabled.
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List of Quick View Screens
Depending on the type of the Micrologic X control unit, Quick View mode displays the following screens:
Screen
Health
Description
Micrologic X type
Displays the health of the circuit breaker:
Micrologic 2.0 X,
5.0 X, 6.0 X, 7.0 X

OK (white)

Alarm - medium-level (orange)

Alarm - high-level (red)
Current1
Displays I1, I2, I3 RMS current on phase 1, 2, 3 values as bar graphs
Micrologic 2.0 X,
expressed in % of Ir.The highest phase current value is displayed in A (Amps) 5.0 X, 6.0 X, 7.0 X
under the bar graph.
Network1
Displays real-time values for:
 Average of 3 RMS phase-to-phase voltage
 Frequency
 Power factor
Micrologic 2.0 X,
5.0 X, 6.0 X, 7.0 X
Power1
Displays real time values for:
 P tot: total active power
 Q tot: total reactive power
 S tot: total apparent power
Micrologic 2.0 X,
5.0 X, 6.0 X, 7.0 X
Energy1
Displays real time values for:
 Ep: total active energy
 Eq: total reactive energy
 Es: total apparent energy
Micrologic 2.0 X,
5.0 X, 6.0 X, 7.0 X
Indicates, when dual setting is on:
Micrologic 2.0 X,
5.0 X, 6.0 X, 7.0 X
Trip curve
 A curve activated or
 B curve activated
NOTE: The screen is not displayed when dual setting is off.
LI
LSI
Displays a selection of protection settings:
 Long time overcurrent protection threshold Ir
 Long time overcurrent protection time delay tr
 Short time overcurrent protection threshold Isd
Micrologic 2.0 X
Displays a selection of protection settings:
Micrologic 5.0 X,
6.0 X, 7.0 X
 Long time overcurrent protection threshold Ir
 Long time overcurrent protection time delay tr
 Short time overcurrent protection threshold Isd
 Short time overcurrent protection time delay tsd
 Instantaneous overcurrent protection threshold Ii
Displays a selection of protection settings:
 Ground fault protection threshold Ig
Micrologic 6.0 X
 Ground fault protection time delay tg
Displays a selection of protection settings:
 Earth fault protection threshold IΔn
Micrologic 7.0 X
 Earth fault protection time delay tΔn
1 Screen data is refreshed every second.
Configuring Quick View Mode
To configure Quick View settings, go to Home → Configuration → General → Quick View. The following
settings are available:
 Scrolling: Set this to ON to enable automatic scrolling in Quick View. (When OFF is selected, the current
bar graph screen is displayed after the configured timeout.)
When Quick View scrolling is enabled the following settings are available:
 Pageflow: The length of time each Quick View screen is displayed while scrolling.
 Auto start: The time delay before Quick View scrolling resumes after an interruption. This time delay is
also the event timeout, which is the time delay before an event message is displayed again if the event
cause is not acknowledged by pressing OK.
When Quick View scrolling is disabled the following setting is available:
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Time out: The time delay before the current bar graph is displayed. This time delay is also the event
timeout, which is the time delay before an event message is displayed again if the event cause is not
acknowledged by pressing OK.
The configurable settings are shown in the following table.
Setting
Unit
Range
Step
Factory Setting
Scrolling
–
ON/OFF
–
ON
Pageflow
seconds
3–60
Auto start
minutes
1–60
15
Time out
minutes
1–60
15
Starting Quick View Scrolling
With Quick View mode enabled, resume Quick View scrolling:
 automatically
 manually
To begin Quick View scrolling automatically, wait for the Auto start timeout to elapse.
To begin Quick View scrolling manually:
Step
Action
In the Home menu, select Quick View.
Press OK to resume Quick View scrolling.
Stopping Quick View Scrolling
Stop Quick View scrolling as follows:
 Press the ESC or home button. The display screen displays the Home menu. From here, use the up
and down buttons to navigate through the menu structure.
NOTE: If no button is pressed before the Auto start timeout expires, Quick View scrolling resumes.

Press one of the three contextual buttons. Quick View scrolling stops. Use the up and down buttons to
scroll manually through the Quick View screens.
Disabling Quick View Automatic Scrolling
To disable scrolling in Quick View mode:
Step
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Action
Press the Home button.
Navigate to Home → Configuration → General → Quick View.
Press OK.
Use the + or - contextual buttons to set the Scrolling setting to:
 ON to select Quick View automatic scrolling.
 OFF to disable Quick View automatic scrolling.
Press OK to save the selection.
Press ESC or the Home button.
A confirmation screen is displayed.
Press Y to save the settings.
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Tree Navigation Mode
Tree Structure Screen Display
Use Tree Navigation mode to navigate manually through the Micrologic X control unit menu structure. Tree
Navigation mode enables the following actions:
 Display measurement values for the control unit
 View active alarms, and event history
 View maintenance items, and a history of service records
 Display and edit control unit configuration settings
 Display and edit protection settings
All Tree Navigation menu selections begin at the home button:
Display Screen Menus
The Micrologic X control unit presents data, commands, and settings in a tree structure. Click the link on
one of the following level 2 sub-menu items to see its content:
Level 1
Level 2
Home
Quick View (see page 35)
Measures (see page 45)
Alarms/History (see page 50)
Maintenance (see page 51)
Configuration (see page 52)
Protection (see page 54)
Measures Screens with Quality Gauge
A quality gauge is displayed on the following screens to give a graphical representation of the
measurement compared to the expected range:
 3-phase current unbalances IUnb
 Average of 3 rms phase-to-neutral voltages Vavg VLL(V)
 Maximum of 3 rms phase-to-neutral voltage unbalances Vunb VLL(%)
 Frequency F(Hz)
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For example, for the frequency screen, the following icons indicate the measurement compared to the
expected range:
OK if the difference between
the measured and expected
frequencies is less than 1%
Medium-level alarm if the
difference between the measured
and expected frequencies is +1–
4% or -1– -6%
High-level alarm if the
difference between the measured
and expected frequencies is
greater than +4% or less than -6%
Navigating in the Menu Structure
Use the contextual and dedicated buttons on the face of the Micrologic X control unit to navigate in the
menu structure, and to access displayed values and configurable settings.
The possible operations are listed below, and are illustrated with an example:
 Display data, for example, energy values
 Reset values or counters, for example, reset the maximum RMS current
 Select options in a list, for example, language
 Edit a value, for example, nominal voltage
 Set protection settings, for example, long-time overcurrent protection
 Validate a pop-up message, for example, a pop-up trip message
Displaying Data
The following example shows how to display energy values:
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Step
Action
Press the home button. The Home menu opens. Press the down arrow to select
Measures.
Press OK. The Measures menu opens. Press the down arrow to select Energy.
Press OK. The Energy menu opens. Press the down arrow to select E in.
Press OK. The E in screen is displayed.
To exit the E in screen, either:
 Press the home button to return to the Home menu.
 Press the ESC button to return to the Energy menu.
Screen
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Resetting Values
Some menus present values or counters that can be reset. The following example shows how to navigate
to and reset the maximum RMS current:
Step
Action
Press the home button. The Home menu opens. Press the down arrow to select
Measures.
Press OK. The Measures menu opens. Select Current.
Press OK. The Current menu opens. Press the down arrow to select Reset Max.
Press OK. The Reset Max confirmation screen opens.
Do one of the following:
 Press Y to reset the maximum RMS current and return to the Current screen.
 Press N to return to the Current screen without resetting the value.
Screen
Selecting Options in a List
Some menus present options in a list. The following example shows how to navigate to and select
language options:
40
Step
Action
Press the home button. The Home menu opens. Press the down arrow to select
Configuration.
Press OK. The Configuration menu opens. Select General.
Screen
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Using Micrologic X Control Units
Step
Action
Press OK. The General menu opens. Select Language
Press OK. The Language menu opens.
Press the up and down arrow buttons to select a language and press OK. A
confirmation check appears next to the selected language.
To save the selection, press:
 The ESC button to return to the General menu.
 The home button to return to the Home menu.
Screen
–
In the confirmation screen:
 Press Y to confirm the change of settings.
 Press N to undo the edit.
Editing and Saving Parameter Settings
When editing a parameter setting, use the + or – buttons to increment or decrement the setting by a singlestep amount. Hold down the button to accelerate the process.
This function applies to both numeric values and list selections.
The following example shows how to edit the nominal voltage:
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Step
Action
Press the home button. The Home menu opens. Press the down arrow to select
Configuration.
Press OK. The Configuration menu opens. Press the down arrow to select Network.
Screen
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Step
Action
Press OK. The Network menu opens. Select Nominal Voltage.
Press OK. The Nominal Voltage menu opens.
In the Nominal Voltage menu, select Un(V) and press OK to enable editing of the
Un(V) parameter. The parameter is displayed in black on a white background to
indicate that editing is enabled.
In this example, 400, the factory setting value, is displayed.
Press the + and – buttons to scroll through available settings.
Possible values are 208, 220, 230, 240, 380, 400, 415, 440, 480, 500, 525, 550,
575, 600, 660, 690, and 1,000.
Press OK to select a setting.
The background changes to black.
To save the change of settings, press one of the following:
 The ESC button to return to the Nominal Voltage screen
 The home button to return to the Home menu
In the confirmation screen:
 Press Y to confirm and save the change of settings.
 Press N to undo the edit.
Screen
–
If the edit did not succeed, a detected error message appears. Click OK to confirm the message, and then
the previous menu is displayed.
Setting Protection Settings
The following example shows how to set the long-time overcurrent protection:
42
Step
Action
Press the home button. The Home menu opens. Press the down arrow to select
Protection.
Screen
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Using Micrologic X Control Units
Step
Action
Press OK. The Protection menu opens. Select I Long time.
Press OK. The I Long time menu opens. In the I Long time menu, select the Ir
parameter.
Press OK to enable editing of the Ir parameter.
The parameter is displayed in black on a white background to indicate that editing
is enabled.
Press the + and – buttons to scroll through available settings.
Press OK to select a setting.
The parameter is displayed in white on a black background to indicate that a setting
has been selected.
Use the down arrow to select the next parameter to be set and repeat step 5.
To save the change of settings, press:
 The ESC button to return to the Protection screen
 The home button to return to the Home menu
Screen
–
In the confirmation screen:
 Press Y to confirm and save the change of settings.
 Press N to undo the edit.
Validating a Pop-Up Message
A trip or alarm event displays a pop-up message on the display screen. The message overrides the screen
currently displayed.
The following example shows how to handle a pop-up trip message.
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Step
Action
A pop-up trip message appears on the screen.
Screen
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44
Step
Action
Press OK to view details of the trip.
If a down arrow appears at the bottom of the screen, press the down arrow to view
more details about the trip event.
After taking steps to resolve the cause of the trip, click OK to acknowledge the trip
context. The Alarm/History screen is displayed.
Press ESC to return to the screen displayed before the pop-up message appeared,
or Home to return to the Home screen.
Screen
–
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Measures Menu
Description
The Measures menu contains the following sub-menus:
Level 1
Level 2
Level 3
Function description
Home
Measures
Current
Current real-time measurements
Voltage
Voltage real-time measurements
Power
Power real-time measurements
Energy
Energy real-time measurements
Frequency
Frequency real-time measurements
I Harmonics
Current harmonics real-time measurements
V Harmonics
Voltage harmonics real-time measurements
Power Factor
Power factor real-time measurement
Current
The Current menu presents the following measurements:
Level 3
Level 4
Current
Level 5
Parameter name
I1 (A)
RMS current on phase 1
I2 (A)
RMS current on phase 2
I3 (A)
RMS current on neutral
Ig (A)2
RMS current on ground
IΔn (A)3
RMS current on earth leakage
I1 (A)
Maximum RMS current on phase 1
I2 (A)
Maximum RMS current on phase 2
IN (A)
I MAX
RMS current on phase 3
I3 (A)
IN (A)
Ig
Maximum RMS current on phase 3
Maximum RMS current on neutral
Maximum of RMS current on ground
(A)2
IΔn (A)
Maximum of RMS current on earth leakage
I Avg
I (1,2,3) (A)
Average of 3-phase RMS currents
I Unb
I (1,2,3) (%)
3-phase current unbalances, with quality gauge
I Unb MAX
I (1,2,3) (%)
Maximum of 3-phase current unbalances
Reset MAX
Reset of maximum RMS current, plus date and time of
last reset
1 Applies to 4-pole circuit breakers or 3-pole circuit breakers with ENCT option.
2 Applies to Micrologic 2.0 X, 5.0 X, 6.0 X
3 Applies to Micrologic 7.0 X.
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Voltage
The Voltage menu presents the following measurements:
Level 3
Level 4
Level 5
Parameter name
Voltage
V12 (V)
RMS phase-to-phase voltage 1-2
V23 (V)
RMS phase-to-phase voltage 2-3
V31 (V)
V1N (V)
RMS phase-to-neutral voltage 1-N
V2N (V)
RMS phase-to-neutral voltage 2-N
(V)1
RMS phase-to-neutral voltage 3-N
V3N
V MAX
RMS phase-to-phase voltage 3-1
V12 (V)
Maximum RMS phase-to-phase voltage 1-2
V23 (V)
Maximum RMS phase-to-phase voltage 2-3
V31 (V)
Maximum RMS phase-to-neutral voltage 1-N
V2N (V)1
Maximum RMS phase-to-neutral voltage 2-N
V3N (V)1
Maximum RMS phase-to-neutral voltage 3-N
V12 (V)
Minimum RMS phase-to-phase voltage 1-2
V23 (V)
Minimum RMS phase-to-phase voltage 2-3
V1N (V)
V MIN
Maximum RMS phase-to-phase voltage 3-1
V31 (V)
Minimum RMS phase-to-neutral voltage 1-N
(V)1
Minimum RMS phase-to-neutral voltage 2-N
Minimum RMS phase-to-neutral voltage 3-N
V1N (V)
V2N
V3N (V)
V Avg
V Unb
VUnb MAX
Minimum RMS phase-to-phase voltage 3-1
VLL (V)
Average of 3 RMS phase-to-phase voltages
(V12+V23+V31)/3, with quality gauge
VLN (V)1
Average of 3 RMS phase-to-neutral voltages
(V1N+V2N+V3N)/3
VLL (%)
3 phase-to-phase voltage unbalances, with quality
gauge
VLN (%)1
3 phase-to-neutral voltage unbalances
VLL (%)
Maximum V Unb VLL value since last reset
VLN (%)
Reset MIN/MAX
Maximum V Unb VLN value since last reset
Reset of minimum and maximum RMS voltage, plus
date and time of last reset
1 Applies to 4-pole circuit breakers or 3-pole circuit breakers with ENVT option.
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Power
The Power menu presents the following measurements:
Level 3
Level 4
Level 5
Parameter name
Power
P1 (kW)
Active power on phase 1
P2 (kW)
Active power on phase 2
P3 (kW)
Active power on phase 3
Ptot (kW)
Total active power
Ptot (kW)
Maximum total active power
P MAX
Q MAX
S MAX
(kVAR)1
Reactive power on phase 1
Q2 (kVAR)
Reactive power on phase 2
Q3 (kVAR)
Reactive power on phase 3
Q1
Qtot (kVAR)
Total reactive power
Qtot (kVAR)
Maximum total reactive power
(kVA)1
Apparent power on phase 1
S2 (kVA)
Apparent power on phase 2
S3 (kVA)
Apparent power on phase 3
S1
Stot (kVA)
Total apparent power
Stot (kVA)
Maximum total apparent power
Reset MAX
Reset of maximum power, plus date and time
of last reset
1 Applies to 4-pole circuit breakers or 3-pole circuit breakers with ENVT option.
Energy
The Energy menu presents the following measurements:
Level 3
Level 4
Energy
E total
Level 5
Parameter name
Ep (kWh)
Total active energy
Eq (kVArh)
Total reactive energy
Es (kVAh)
Total apparent energy
E received
Ep (kWh)
Total active energy delivered (counted positively)
Eq (kVArh)
Total reactive energy delivered (counted positively)
E delivered
Ep (kWh)
Total active energy received (counted negatively)
Eq (kVArh)
Total reactive energy received (counted negatively)
Reset counters
Reset of accumulated energy, plus date and time of last
reset
Frequency
The Frequency menu presents the following measurements:
Level 3
Level 4
Level 5
Parameter name
Frequency
F (Hz)
Frequency, with quality gauge
F MAX
F (Hz)
Maximum frequency
F MIN
F (Hz)
Minimum frequency
Reset MIN/MAX
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Reset of minimum and maximum frequency, plus date and
time of last reset
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I Harmonics
The I Harmonics menu presents the following measurements:
Level 3
Level 4
Level 5
I Harmonics
I THD
I1 (%)
Level 6
Total Harmonic Distortion (THD) of current on phase
1 compared to the fundamental
I2 (%)
Total Harmonic Distortion (THD) of current on phase
2 compared to the fundamental
I3 (%)
Total Harmonic Distortion (THD) of current on phase
3 compared to the fundamental
IN (%)1
Total Harmonic Distortion (THD) of current on neutral
compared to the fundamental
I THD IN MAX1
IN (%)
Maximum of Total Harmonic Distortion (THD) of
current on neutral compared to the fundamental
I THD Avg
I (1, 2, 3)%
Average of 3 phase current Total Harmonic
Distortions (THD) compared to the fundamental
I THD Avg MAX
I (1, 2, 3)%
Maximum average of 3 phase current Total Harmonic
Distortions (THD) compared to the fundamental, plus
date and time of occurrence
Reset MAX
Parameter name
Reset of minimum and maximum THD/thd, plus date
and time of last reset
1 Applies to 4-pole circuit breakers or 3-pole circuit breakers with ENVT option.
V Harmonics
The V Harmonics menu presents the following measurements:
Level 3
Level 4
Level 5
Voltage
V THD
V12 (%)
Total harmonic distortion (THD) of phase-to-phase
voltage 1-2 compared to the fundamental
V23 (%)
Total harmonic distortion (THD) of phase-to-phase
voltage 2-3 compared to the fundamental
V31 (%)
Total harmonic distortion (THD) of phase-to-phase
voltage 3-1 compared to the fundamental
V1N (%)1
Total harmonic distortion (THD) phase-to-neutral
voltage 1-N compared to the fundamental
V2N (%)1
Total harmonic distortion (THD) phase-to-neutral
voltage 2-N compared to the fundamental
V3N (%)1
Total harmonic distortion (THD) phase-to-neutral
voltage 3-N compared to the fundamental
VLL (%)
Average of 3 phase-to-phase voltage Total Harmonic
Distortions (THD) compared to the fundamental
VLN (%)1
Average of 3 phase-to-neutral voltage Total Harmonic
Distortions (THD) compared to the fundamental
VLL (%)
Maximum value since last reset of average of 3 phaseto-phase voltage Total Harmonic Distortions (THD)
compared to the fundamental
VLN (%)1
Maximum value since last reset of average of 3 phaseto-neutral voltage Total Harmonic Distortions (THD)
compared to the fundamental
V THD Avg
V THD Avg MAX
Reset MAX
Level 6
Parameter name
Reset all maximum and minimum voltages
1 Applies to 4-pole circuit breakers or 3-pole circuit breakers with ENVT option.
48
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Using Micrologic X Control Units
Power Factor Menu
The Power Factor menu presents the following data:
Level 3
Level 4
Parameter name
Power Factor
PF
Total power factor
Cos Φ
Network
Total fundamental power factor
Capacitive1
Network Inductive2
Lead
Lag
1 In the case of lead.
2 In the case of lag.
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Using Micrologic X Control Units
Alarms & History Menu
Description
The Alarms & History menu contains the following sub-menus:
Level 1
Level 2
Home
Alarms &
History
Level 3
Alarms
Function description
31
Contains active alarms of medium and high-level severity. Trips are not
included.
Trips history
Contains trip history.
Alarms history
Contains alarm history, not including trip history.
1 The figure indicates the number of active alarms
NOTE: Trip history and alarm history events are listed in chronological order, with the most recent event
first.
Alarm Screen
An alarm screen contains the following information:
Screen title: Alarm
Alarm description: up to 3 lines of text describing the nature of the alarm
Occurrence
The date and time that the alarm occurred
A down arrow at the bottom of the screen indicates that another alarm screen can be displayed.
Trips History and Alarms History Screens
A trips history or alarms history screen contains the following information:
Screen title: Trip history or Alarms history
Alarm description: up to 3 lines of text describing the nature of the alarm
Occurrence
The date and time of the occurrence of the alarm
Completion
The date and time of the completion of the alarm
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Using Micrologic X Control Units
Maintenance Menu
Description
The Maintenance menu contains the following sub-menus:
Level 1
Level 2
Home
Maintenance
Level 3
Function description
Switch to other
set1
Dual setting configuration
Assistance
Contains information describing the maintenance providers,
schedule, equipment and type of the circuit breaker.
Health
Describes the monitored health of the circuit breaker.
CB overview
Presents information about the circuit breaker and its internal
and external accessories.
1 Displayed only when Dual Settings is enabled and configured mode for switching between set A and set B is Local
HMI
Switch to Other Set
The Switch to other set menu is displayed only when Dual Settings is enabled and presents the following
data:
Level 3
Level 4
Parameter name
Switch to other set
Switch to set B
Selection of the setting group A or B, when the dual settings function is
enabled.
Assistance
The Assistance menu presents the following data:
Level 3
Level 4
Assistance
Firmware Version μLogic version
Level 5
Parameter name
Micrologic X firmware version
ASIC version
TCI version
M&P version
Measure version
CRC32
Health
The Health menu presents the following data:
Level 3
Parameter name
Health
Health is represented by one of three icons:

no alarm detected

Orange icon: medium-level alarm detected

Red icon: high-level alarm detected
CB Overview
The CB overview menu presents the following data:
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Level 3
Level 4
Parameter name
CB overview
CB block
Circuit breaker, frame size, power system, performance level and
version.
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Using Micrologic X Control Units
Configuration Menu
Description
The Configuration menu contains the following sub-menus:
Level 1
Level 2
Level 3
Function description
Home
Configuration
General
Settings of the HMI display and access to protection settings.
Network
Settings of nominal voltage and frequency, power, or power
sign and VT ratio (see page 52).
Measures
Settings of measurement calculation (see page 53).
Communication
Settings enabling wireless access and the control mode
(see page 53).
General
The General menu presents the following data:
Level 3
Level 4
General
Language (see page 33)
Date & Time
(see page 22)
Quick View
(see page 36)
Level 5
Parameter name
List of display screen languages.
dd/mm/yyyy
Today’s date.
hh:mm:ss
Local time.
Scrolling
Enable/disable Quick View scrolling.
Auto start (min)
The time delay before Quick View scrolling resumes after
an interruption if no button is pressed.
Pageflow (sec)
The length of time for which each Quick View screen is
displayed.
Timeout (min)
The time delay before the current bar graph is displayed if
no button is pressed.
NOTE: Only available when Quick View is enabled.
NOTE: Only available when Quick View is enabled.
NOTE: Only available when Quick View is not enabled.
Lock protection
(see page 63)
Keypad
External access
Enable locking of access to the Protection menu either
through the local HMI keypad or through external access,
to help prevent unauthorized users from editing protection
settings.
 Not Allowed: to lock the Protection menu
 Allowed: to unlock the Protection menu
Network
The Network menu presents the following data:
Level 3
Level 4
Level 5
Parameter name
Network
Nominal Voltage
Un (V)
Rated voltage.
Setting values include: 208 / 220 / 230 / 240 / 380 / 400 /
415 / 440 / 480 / 500 / 525 / 550 / 575 / 600 / 660 / 690 /
1000 V.
Factory setting = 400.
Nominal
Frequency
Hz
Rated frequency
 50 Hz (factory setting)
 60 Hz
Power flow sign setting:
 P+ = the active power flows from upstream (top) to
downstream (bottom) (factory setting).
 P– = the active power flows from downstream (bottom)
to upstream (top).
Power Sign
(see page 119)
VT Ratio
52
VT in
VT primary voltage.
Values from 100 to 1,250, in increments of 1.
VT out
VT secondary voltage.
Values from 100 to 690, in increments of 1.
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Using Micrologic X Control Units
Measures
The Measures menu presents the following data:
Level 3
Level 4
Measures
PF/VAR Conv (see page 128)
System Type
(see page 114)
Level 5
Parameter name
Sign convention for cos Φ, PF power factor, and reactive
power:
IEC or IEEE (for display only)
Nb of poles
3P or 4P, for display only.
ENVT
External neutral voltage tap. Setting values include:
 If 4P: NO (for display only)
 If 3P: YES or NO
ENCT
External neutral current transformer. Setting values include:
 If 4P: NO (for display only)
 If 3P: YES or NO
Total P Calcul (see page 117)
Total power calculation method:
 Vector
 Arithmetic
E Calcul (see page 121)
Energy Accumulation mode. Energy values to be used in
energy calculations:
 Absolute
 Signed
Communication
The Communication menu presents the following data:
Level 3
Level 4
Level 5
Parameter name
Communication
Bluetooth
–
Enables Bluetooth control: ON or OFF
BLE timer
Time delay before Bluetooth is automatically deactivated:
 if no connection is established
 if no activity is detected
From 5 to 60 minutes.
Factory setting = 15 minutes
IEEE 802.15.4
Enables IEEE 802.15.4 communication: ON or OFF
NOTE: Enabled only if IEEE 802.15.4 has already been
commissioned through Ecoreach software.
Control mode
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Mode
Selection of source for open/close function
 MANU: manually using local mechanical button.
Displays (Push button command only). The control
unit will reject remote open/close orders.
 AUTO: In addition to manual orders, the control unit
will accept certain open/close orders, depending on
the configuration of the remote/local parameter. The
configuration is displayed as (Remote control) or
(Local control)
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Using Micrologic X Control Units
Protection Menu
Description
The Protection menu contains the following sub-menus:
Level 1
Level 2
Level 3
Function description
Home
Protection
I Long time
Long-time overcurrent protection (see page 65), L or ANSI code
49RMS
I Short time1
Short-time overcurrent protection (see page 68), S or ANSI code 51
I Instantaneous
Instantaneous overcurrent protection (see page 70), I or ANSI code
50
I Ground Fault2
Ground-fault protection (see page 72), G or ANSI code 50G/51G
Earth Leakage3
Earth-leakage protection (see page 74), ANSI code 50G/51G
I Neutral
Neutral protection (see page 76)
Dual Settings
Dual settings (see page 78)
1 Applies to Micrologic 5.0 X, 6.0 X, 7.0 X
2 Applies to Micrologic 6.0 X
3 Applies to Micrologic 7.0 X
I Long Time
The I Long time menu presents the following data and settings:
Level 3
Level 4
Parameter name
I Long time
Ir (x In)
Ir long-time overcurrent protection threshold expressed according to the control
unit rated current In.
Used for quick settings: 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 0.95, 0.98, 1 x In.
Ir (A)
Ir long-time overcurrent protection threshold expressed in Amps.
Used for settings with 1 A resolution.
tr @6Ir (s)
tr long-time overcurrent protection time delay.
I Short Time
The I Short time menu for Micrologic 5.0 X, 6.0 X, 7.0 X presents the following data and settings:
Level 3
Level 4
Parameter name
I Short time
Ir (A)
Ir long-time overcurrent protection threshold expressed according to the control
unit rated current In, for display only
Isd (x Ir)
Isd short-time overcurrent protection threshold expressed according to the Ir
long-time overcurrent protection threshold.
Step = 0.5 x Ir; Rang = 0.5–10 x Ir
Isd (A)
Isd short-time overcurrent protection threshold expressed in Amps, for display
only.
tsd (s)
tsd short-time overcurrent protection time delay.
I2t
Enable inverse time curve function: ON or OFF
(tsd)
I Instantaneous
The I Instantaneous menu for Micrologic 2.0 X presents the following data and settings:
54
Level 3
Level 4
Parameter name
I Instantaneous
Ir (A)
Ir long-time overcurrent protection threshold expressed in Amps, for
display only
Isd (x Ir)
Isd short-time overcurrent protection threshold expressed according
to the Ir long-time overcurrent protection threshold.
Step = 0.5 x Ir. Range = .5–10 x Ir
Isd (A)
Isd short-time overcurrent protection threshold expressed in Amps, for
display only.
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Using Micrologic X Control Units
The I Instantaneous menu for Micrologic 5.0 X, 6.0 X, and 7.0 X presents the following data and settings:
Level 3
Level 4
Parameter name
I Instantaneous
Protection
Enable instantaneous overcurrent protection mode: ON or OFF
Ii (x In)
Ii instantaneous overcurrent protection threshold expressed
according to the control unit rated current In.
Step = 0.5 x In. Range = .2–15 x In
Ii (A)
Ii instantaneous overcurrent protection threshold expressed in Amps,
for display only.
Ii mode
Instantaneous overcurrent protection time delay mode: Standard or
Fast
Earth Leakage
The Earth Leakage menu for Micrologic 7.0 X presents the following data and settings:
Level 3
Level 4
Parameter name
Earth Leakage
IΔn (A)
Earth fault protection threshold expressed in Amps
tΔn (s)
Earth fault protection time delay
I Ground Fault
The I Ground Fault menu presents the following data and settings:
Level 3
Level 4
Level 5
Parameter name
I Ground Fault
Protection
Enable Ground Fault protection mode: ON or
OFF
Ig (x In)
Ground fault protection threshold expressed
according to the control unit rated current In
Ig (A)
Ground fault protection threshold expressed in
Amps
tg (s)
Ground fault protection time delay
I t (tg)
Enable ground fault protection curve function:
ON or OFF
I Neutral
The I Neutral menu presents the following data and settings:
Level 3
I Neutral
Level 4
Parameter name
Nb of poles
Number of poles 3P or 4P, for display only
Ir (A)
Long time overcurrent protection threshold, for display only.
Protection
Set neutral protection:
 OFF
 0.5
 1
 Oversized Neutral
IN (A)
RMS current on neutral, for display only
1 Applies to 4-pole circuit breakers and 3-pole circuit breakers with ENCT option
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Using Micrologic X Control Units
Dual Settings
The Dual Settings menu presents the following data and settings:
Level 3
Level 4
Parameter name
Dual Settings
Dual Settings
Enables dual settings: YES or NO
Settings
Displays the active configuration A or B, if Dual Settings is enabled.
Switch
Displays the configured mode for switching between setting group A and
setting group B:
 Local HMI
 IO module
 Remote ctrl
mode1
1 Displayed if Dual Settings is enabled. Configurable through Ecoreach software
If the Dual Settings menu is enabled the following data and settings are shown and can be configured:
Level 4
Level 5
Dual settings: I Long time1
Settings B
I Short time
Level 6
Parameter name
Ir (x In)
Ir long-time overcurrent protection threshold expressed
according to the control unit rated current In, for display
only.
Ir (A)
Ir long-time overcurrent protection threshold expressed
in Amps.
tr @6Ir (s)
tr long-time overcurrent protection time delay.
Ir (A)
Ir long-time overcurrent protection threshold expressed
according to the control unit rated current In, for display
only.
Isd (x Ir)
Isd short-time overcurrent protection threshold
expressed according to the Ir long-time overcurrent
protection threshold.
Isd (A)
Isd short-time overcurrent protection threshold
expressed in Amps, for display only.
tsd (s)
tsd short-time overcurrent protection time delay.
Enable inverse time curve function: ON or OFF
I t
I Instantaneous
Protection
Ii (x
In)2
Enable instantaneous protection: ON or OFF
Ii instantaneous overcurrent protection threshold
expressed according to the control unit rated current In.
Ii (A)2
Ii instantaneous overcurrent protection threshold
expressed in Amps, for display only.
Ii mode2
Instantaneous overcurrent protection time delay mode:
Standard or Fast
Protection
Enable I Ground Fault protection mode: ON or OFF
Ig (x In)
Ground fault protection threshold expressed according
to the control unit rated current In
Ig (A)
Ground fault protection threshold expressed in Amps
tg (s)
Ground fault protection time delay
I2t (tg)
Enable ground fault protection curve function: ON or
OFF
1 If Dual Settings is enabled, B is displayed on the upper left side of these screens.
2 Applies to Micrologic 5.0 X, 6.0 X, 7.0 X
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Pop-up Event Messages
Event Message Types and Priority
When the Micrologic X control unit detects any of the following events, a pop-up message is displayed, in
this order of priority:
 Bluetooth pairing
 Trip
 High-level alarm
 Medium-level alarm
An event message overrides another event message with lower priority.
An event message overrides both Quick View scrolling and tree navigation operating mode displays.
Bluetooth Pairing Display
The Bluetooth pairing message is displayed during the Bluetooth pairing procedure (see page 157).
The Bluetooth pairing message has the highest priority and overrides all other messages.
The Bluetooth pairing screen is closed when:
 The pairing is confirmed on the mobile device
 The Bluetooth button on the local HMI is pressed
 The Bluetooth pairing timeout expires
If an event message was displayed before or occurs during the Bluetooth pairing, it is displayed after the
Bluetooth pairing message closes. Otherwise the Home screen is displayed.
Pop-up Trip and Alarm Message Displays
Message type
Description
Trip
When a trip occurs, the trip message is displayed with a red
backlight.
High-level alarm
When a high-level alarm occurs, the high-level alarm message
is displayed with a red backlight.
Medium-level alarm
When a medium-level alarm occurs, the medium-level alarm
message is displayed with an orange backlight.
Example
Handling Pop-up Trip and Alarm Messages
A trip or alarm message indicates that a potentially serious operating event has occurred. To address the
event, take the following steps:
Step
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Action
When the trip or alarm event message displays, press OK.
The display screen displays a message explaining the context of the trip or details of the alarm event. The
backlight color turns white.
After reading the explanatory message, take the remedial steps necessary to resolve the underlying
condition that caused the trip or alarm.
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Using Micrologic X Control Units
Step
Action
After resolving the cause of the event, press OK to acknowledge the message. The explanatory message
closes, and the display screen shows the Alarm/History menu screen.
NOTE: Return to the Home screen by pressing ESC or the Home button while a pop-up screen or
trip/alarm context screen is displayed.
NOTE: The display screen displays the trip or alarm message again, with the appropriate backlight color,
when the message is not acknowledged by pressing OK before the event timeout expires.
For information about handling trip and alarm events, refer to the Masterpact MTZ2/MTZ3 Circuit Breakers
and Switch-Disconnectors - User Guide.
For information about how Micrologic X control units handle events, refer to Event Management
(see page 164).
Event Timeout
The event timeout can be configured in Configuration → General → Quick View.
If Quick View scrolling is on, the event timeout is the same as the Auto start for Quick View.
If Quick View scrolling is off, the event timeout is displayed as Time out.
For more information about event timeout configuration, refer to Configuring Quick View Scrolling
(see page 36).
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Micrologic X
Protection Functions
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Chapter 3
Protection Functions
Protection Functions
What Is in This Chapter?
This chapter contains the following sections:
Section
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Topic
Page
3.1
Introduction
60
3.2
Standard Protection Functions
64
3.3
Setting Guidelines
84
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Protection Functions
Section 3.1
Introduction
Introduction
Electrical Distribution Protection
Presentation
Micrologic X control units are designed to provide protection against overcurrents and ground-fault
currents.
Micrologic X control units offer protection characteristics that comply with the requirements of standard
IEC 60947-2.
Description
When choosing protection characteristics, take into account:
 Overcurrents (overloads and short-circuits) and potential ground-fault currents
 Conductors that need protection
 Coordination and selectivity between the devices
 The presence of harmonic currents
Protection characteristics can be represented on a trip curve that shows the circuit breaker trip time as a
function of the measured current and protection settings. Protection settings are indexed on the rated
current In of the Micrologic X control unit.
Rated Current In
The protection setting ranges depend on the rated current In, defined by the sensor plug inserted in the
Micrologic X control unit.
The sensor plug can be replaced or modified. Mechanical mismatch protection prevents the installation of
a sensor plug that is not compatible with the circuit breaker frame.
For each circuit breaker frame size, the range of sensor plugs available is shown in the following table.
60
Sensor plug
MTZ1 frame rated current
MTZ2 frame rated current
In
06
08
10
12
16
08
10
400 A
–
–
–
–
–
–
–
–
–
–
–
630 A
–
–
–
–
–
–
–
–
–
12
16
20
MTZ3 frame
rated current
25
32
40
40
50
63
800 A
–
–
–
–
–
–
–
–
1000 A
–
–
–
–
–
–
–
–
–
1250 A
–
–
–
–
–
–
–
–
–
–
1600 A
–
–
–
–
–
–
–
–
–
–
–
2000 A
–
–
–
–
–
–
–
–
–
–
–
2500 A
–
–
–
–
–
–
–
–
–
–
–
3200 A
–
–
–
–
–
–
–
–
–
–
–
4000 A
–
–
–
–
–
–
–
–
–
–
–
–
5000 A
–
–
–
–
–
–
–
–
–
–
–
–
–
–
6300 A
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
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Protection Functions
Micrologic 2.0 X Control Unit
Micrologic 2.0 X control units provide:
 Long-time overcurrent protection (Ir)
 Instantaneous overcurrent protection (Isd)
The protection functions of Micrologic 2.0 X control units operate without an auxiliary power supply.
The control unit is powered by the current flowing through the circuit breaker.
Micrologic 5.0 X Control Unit
Micrologic 5.0 X control units provide:
 Long-time overcurrent protection (Ir)
 Short-time overcurrent protection (Isd)
 Instantaneous overcurrent protection (Ii)
The protection functions of Micrologic 5.0 X control units operate without an auxiliary power supply. The
control unit is powered by the current flowing through the circuit breaker.
Micrologic 6.0 X Control Unit
Micrologic 6.0 X control units provide:
 Long-time overcurrent protection (Ir)
 Short-time overcurrent protection (Isd)
 Instantaneous overcurrent protection (Ii)
 Ground-fault protection (Ig)
The protection functions of Micrologic 6.0 X control units operate without an auxiliary power supply. The
control unit is powered by the current flowing through the circuit breaker.
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Protection Functions
Micrologic 7.0 X Control Unit
Micrologic 7.0 X control units provide:
 Long-time overcurrent protection (Ir)
 Short-time overcurrent protection (Isd)
 Instantaneous overcurrent protection (Ii)
 Earth-leakage protection (IΔn)
The protection functions of Micrologic 7.0 X control units operate without an auxiliary power supply.
 The long-time, short-time and instantaneous overcurrent protections are powered by the current
flowing through the circuit breaker.
 The earth-leakage protection is powered by the system voltage via the VPS voltage power supply
module.
DIN / DINF and SELLIM Instantaneous Protections
DIN / DINF and SELLIM instantaneous protections are internal protections used when the short-circuit
current reaches the withstand limit of the circuit breaker. These protections are not adjustable and are
unlikely to be triggered in normal operating conditions.
The following events can be generated by the DIN / DINF and SELLIM instantaneous protections. Refer to
the event tables (see page 173) for more information.
Events
History
Severity
Ultimate self-protection trip (SELLIM)
Trip
High
Ultimate self-protection trip (DIN / DINF)
Trip
High
Ultimate self-protection trip (SELLIM) operate
Protection
Medium
Ultimate self-protection trip (DIN / DINF) operate
Protection
Medium
Setting the Protection
Protection functions can be set as follows:
 On the Micrologic X display screen, at Home → Protection
 With Ecoreach software (password protected)
 With Masterpact MTZ mobile App (password protected)
 By sending a setting command using the communication network (password protected)
Setting Change Traceability
Changing the protection settings generates one of two events, depending on where the settings are
changed from. The events are logged in the Protection history (see page 173):
 Protection setting changed (display screen).
 Protection setting changed (Bluetooth, USB or IFE).
Setting changes recorded in the Protection history include the following:
Date and time of the setting change
 Previous settings
 Unlocking protection settings (refer to following paragraph)

When the circuit breaker is open and the Micrologic X control unit is not connected to a power supply, longtime, short-time, instantaneous and ground-fault protection settings and the date of the last change can be
accessed through NFC communication.
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Protection Functions
Locking the Protection Settings
Locking the protection settings is only possible from the Micrologic X display screen at Home →
Configuration → General → Lock protection. It enables you to lock access to protection settings:
 From the Micrologic X display screen
 From an external access
Select Not Allowed to lock access. Access is allowed by default.
Changing the access to protection settings generates two events, which are logged in the Protection
history (see page 173):
 Protection settings on local screen is unlocked
 Remote lock for protection settings is unlocked
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Protection Functions
Section 3.2
Standard Protection Functions
Standard Protection Functions
What Is in This Section?
This section contains the following topics:
Topic
64
Page
Long-Time Overcurrent Protection (L or ANSI Code 49RMS)
65
Short-Time Overcurrent Protection (S or ANSI Code 51)
68
Instantaneous Overcurrent Protection (I or ANSI Code 50)
70
Ground-Fault Protection (G or ANSI Code 50G/51G)
72
Earth-Leakage Protection (ANSI Code 50G/51G)
74
Neutral Protection
76
Dual Settings
78
Zone Selective Interlocking (ZSI)
80
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Protection Functions
Long-Time Overcurrent Protection (L or ANSI Code 49RMS)
Presentation
Long-time overcurrent protection protects cables, busbars, and busbar trunking against overloads, based
on the true RMS current. It is implemented independently for each phase and for the neutral.
This protection function is an overcurrent time-dependent protection with thermal memory. It operates as
a thermal image, using the heating and cooling model of a conductor. After tripping, the protection
continues to integrate the cooling of the conductor.
This protection function can be used also for transformer or generator protection thanks to the wide range
of settings offered.
Availability
Long-time overcurrent protection is available on:
 Micrologic 2.0 X, 5.0 X, 6.0 X, and 7.0 X control units
 3-pole and 4-pole circuit breakers
Long-time overcurrent protection is powered by the current flowing through the internal current
transformers of the circuit breaker and it does not require additional external power supply.
Operating Principle
Long-time overcurrent protection is based on the true RMS current of phases and neutral, up to
harmonic 15.
Long-time overcurrent protection is implemented independently for each phase and for neutral when
present (see page 76).
Thermal Image
The control unit uses the calculation of a thermal image to evaluate the conductor heat rise and precisely
monitor the thermal state of the conductors.
Example:
Comparison of the heat rise calculation without thermal image (diagram A) and with thermal image
(diagram B):


Instantaneous current (cyclical) in the load
Conductor temperature
Thermal state calculated without thermal image (diagram A), with thermal image (diagram B)
Long-time overcurrent protection threshold
Control unit without thermal image: On each current pulse, the control unit only considers the thermal
effect on the pulse under consideration. No tripping occurs despite the build-up in conductor heat rise.
Control unit with thermal image: The control unit adds the thermal effect of successive current pulses.
Tripping occurs based on the actual thermal state of the conductor.
The thermal image function protects cables and busbars from overheating in case of low-amplitude
repetitive faults. Such faults can be due to repetitive motor starts, fluctuating load, intermittent ground
faults, or subsequent closing after a fault.
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Protection Functions
Traditional electronic protection does not protect against repetitive faults because the duration of each
overload detected above the threshold setting is too short to trigger effective tripping. However, each
overload involves a temperature rise in the installation. When cumulated, overloads can overheat the
system.
Thanks to its thermal memory, the thermal image function remembers and integrates thermal heating
caused by each overload detected above the threshold setting:
 Before tripping, the integrated heating value reduces the associated time delay. The reaction of the
control unit is closer to the real heating of the power network system.
 After tripping, the thermal function reduces the time delay when closing the circuit breaker on an
overload.
The thermal memory works whatever the current value. It offers an accurate image of the cable or busbar
thermal status. The time constant is the same for heating and cooling.
In the case of a control unit that is not supplied, the thermal memory is performed by a capacitor, which
implies a fixed cooling time constant. The time constant is equivalent to a tr setting of 12 seconds.
Thermal Memory Reset
The thermal memory can be reset with Ecoreach software.
The thermal memory reset is recorded as an event.
Setting the Protection
The long-time overcurrent protection settings are:
Ir long-time overcurrent protection threshold
 tr long-time overcurrent protection time delay

They can be set as follows:
On the Micrologic X display screen, at Home → Protection → I Long time
 With Ecoreach software
 With Masterpact MTZ mobile App
 By sending a setting command using the communication network.

Long-time overcurrent protection can be duplicated when dual settings are activated (see page 78).
Protection Settings
Setting
Unit
Range
Step
Factory setting
Ir threshold
0.4–1 x In
1A
1 x In
tr time delay
0.5–24
0.5
0.5
The tr long-time overcurrent protection time delay is given in cold-state conditions, and for a phase or
neutral current equal to 6 x Ir.
When the current is higher than Isd or Ii, only short-time overcurrent protection and instantaneous
protection are operational.
Tripping Time According to tr Time Delay
tr setting (tripping time at 6 x Ir)
0.5 s
Resulting tripping time at 1.5 x Ir
12.5 s 25 s
1s
2s
4s
8s
12 s
16 s
20 s
24 s
50 s
100 s
200 s
300 s
400 s
500 s
600 s
Resulting tripping time at 7.2 x Ir
0.34 s 0.69 s 1.38 s 2.7 s
5.5 s
8.3 s
11 s
13.8 s 16.6 s
Protection Characteristics
The accuracy on the tr time delay is:
 -20% to 0% when tr > 2 s
 -25% to 0% when tr = 2 s
 -30% to 0% when tr < 2 s
Ir characteristics:
I < 1.05 x Ir: no trip
 I > 1.2 x Ir: trip

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Protection Functions
Predefined Events
The function generates the following predefined events:
Event
History
Severity
Ir trip
Trip
High
Ir operate
Protection
Medium
Ir prealarm (I>90%Ir)
Protection
Low
Ir start (I>105%Ir)
Protection
Medium
Thermal memory reset order
Protection
Low
Predefined events cannot be modified by the user. For general information on events, refer to Event
management. (see page 164)
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67
Protection Functions
Short-Time Overcurrent Protection (S or ANSI Code 51)
Presentation
Short-time overcurrent protection protects equipment against phase-to-phase, phase-to-neutral and
phase-to-ground short circuits with total selectivity. It includes two characteristics, definite time and inverse
time, which depend on the status of the I²t setting.
Availability
Short-time overcurrent protection is available on:
 Micrologic 5.0 X, 6.0 X, and 7.0 X control units
 3-pole and 4-pole circuit breakers
Short-time overcurrent protection is powered by the current flowing through the internal current
transformers of the circuit breaker and it does not require an additional external power supply.
Operating Principle
The short-time overcurrent threshold Isd sets the level of short-circuit current at which the circuit
breaker trips when reaching the short-time overcurrent time delay.
The short-time overcurrent time delay tsd sets the length of time during which the circuit breaker carries
a short circuit within the short-time overcurrent threshold range.
The short-time overcurrent time delay can be adjusted to:
 Four setting values with I2t ON.
 Up to 10 Ir, the tripping curve is an inverse time curve. The time delay decreases as the current
increases.
 Above 10 Ir, the tripping curve is a definite time curve with a constant tripping time.
 Five setting values with I2t OFF. The tripping curve is a definite time curve with a constant tripping
time.
Short-time overcurrent protection is based on the true RMS current of phases and neutral, up to harmonic
15.
In order to trip on an intermittent fault, the control unit accumulates the intermittent currents in the shorttime tripping range that do not last long enough to trigger a trip. This accumulation may lead to shorter
tripping times than those set.
Setting the Protection
The short-time overcurrent protection settings are:
Isd short-time overcurrent protection threshold
 tsd short-time overcurrent protection time delay
 I²t short-time overcurrent protection curve (I²t ON or I²t OFF)

They can be set as follows:
On the Micrologic X display screen, at Home → Protection → I Short time
 With Ecoreach software
 With Masterpact MTZ mobile App
 By sending a setting command using the communication network. This function is password protected.

Short-time overcurrent protection can be duplicated when dual settings are activated (see page 78).
Protection Settings
The following Isd settings are available:
Setting
Unit
Range
Step
Factory
setting
Accuracy
Isd threshold
1.5 to 10 x Ir
0.5 x Ir1
1.5 x Ir
+/- 10%
1 Finer resolution settings are possible with Ecoreach software and Masterpact MTZ mobile App
tsd time delay setting is as follows:
68
Setting
Unit
Setting Value
tsd with I²t OFF
0.1
0.2
0.3
0.4
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Protection Functions
Setting
Unit
Setting Value
tsd with I²t ON
–
0.1
0.2
0.3
0.4
Non-tripping time
> 0.02
> 0.08
> 0.14
> 0.23
> 0.35
Maximum breaking time
< 0.08
< 0.14
< 0.20
< 0.32
< 0.50
The tsd time delay factory setting is 0 s with I²t OFF.
Zone Selective Interlocking (ZSI)
The ZSI characteristics and external wiring of the zone selective interlocking function, are described
specifically (see page 80).
If ZSI IN is not set to 1 (open circuit between Z3 and Z4 terminals), the maximum breaking time is 0.08 s
regardless of the tsd setting value.
When ZSI IN is set to 1 and connected to the ZSI OUT of a downstream device (or when the ZSI function
is not used and there is a jumper between the Z3 and Z4 terminals), the tsd time delay is used.
The Isd pick up activates ZSI OUT (Z1 and Z2 terminals).
NOTE: Masterpact MTZ circuit breakers are delivered with a jumper installed between Z3 and Z4.
Predefined Events
The function generates the following predefined events:
Event
History
Severity
Isd trip
Trip
High
Isd operate
Protection
Medium
Isd start (I > Isd)
Protection
Medium
Predefined events cannot be modified by the user. For general information on events, refer to Event
Management (see page 163).
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69
Protection Functions
Instantaneous Overcurrent Protection (I or ANSI Code 50)
Presentation
Instantaneous protection protects equipment against phase-to-phase, phase-to-neutral and phase-toground short circuits. The protection operates with a definite time characteristic. It trips without additional
time delay as soon as the setting current is exceeded.
The protection offers two typical total breaking times:
 Standard breaking time of 50 ms, used for applications requiring selectivity. Full selectivity can be
ensured with any Compact NSX circuit breaker installed downstream of a Masterpact device (for
Ue ≤ 440V and MTZ other than type L. Refer to selectivity tables for details).
 Fast breaking time of 30 ms, typically used for applications where the thermal constraints of the
equipment need to be limited and when selectivity is not required.
NOTE: On Micrologic 2.0 X, instantaneous protection is a short-time protection without time setting.
Availability
Instantaneous overcurrent protection is available on:
 Micrologic 2.0 X, 5.0 X, 6.0 X, and 7.0 X control units
 3-pole and 4-pole circuit breakers
It is powered by the current flowing through the internal current transformers of the circuit breaker and it
does not require an additional external power supply.
Operating Principle
The instantaneous overcurrent protection threshold sets the level of short-circuit current at which the circuit
breaker trips with no intentional time delay.
For Micrologic 5.0 X, 6.0 X, 7.0 X control units, instantaneous overcurrent protection can be disabled.
Instantaneous overcurrent protection overrides short-time overcurrent protection when the instantaneous
overcurrent threshold is adjusted to the same or a lower setting than the short-time overcurrent threshold.
Setting the Protection for Micrologic 2.0 X
The instantaneous overcurrent protection setting for Micrologic 2.0 X is:
 Isd short-time overcurrent protection threshold (without time setting)
It can be set as follows:
 On the Micrologic X display screen, at Home → Protection → I Instantaneous
 With Ecoreach software
 With Masterpact MTZ mobile App
 By sending a setting command using the communication network. This function is
password-protected.
Instantaneous overcurrent protection can be duplicated when dual settings are
activated (see page 78).
Protection Settings for Micrologic 2.0 X
Setting
Unit
Range
Step
Factory setting
Isd threshold
1.5–10 x Ir
0.5 x Ir1
1.5 x Ir
1 Finer resolution settings are possible with Ecoreach software and Masterpact MTZ mobile App
Protection Characteristics for Micrologic 2.0 X
70
Characteristic
Unit
tsd
Breaktime at 2 x threshold
ms
≤ 80
Non-tripping time
ms
> 20
Accuracy on threshold
+/- 10
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Protection Functions
Setting the Protection for Micrologic 5.0 X, 6.0 X, 7.0 X
The instantaneous overcurrent protection settings are:
 Ii enable
 li type
 Ii instantaneous overcurrent protection threshold
They can be set as follows:
 On the Micrologic X display screen, at Home → Protection → I Instantaneous
 With Ecoreach software
 With Masterpact MTZ mobile App
 By sending a setting command using the communication network. This function is password-
protected.
Instantaneous overcurrent protection can be duplicated when dual settings are activated
(see page 78).
Protection Settings for Micrologic 5.0 X, 6.0 X, 7.0 X
Setting
Unit
Range
Step
Factory setting
ON
Ii enable
–
ON/OFF
–
Ii type
–
Standard / Fast
–
Ii threshold
1.5–15 x In
0.5 x Ir
Standard
1.5 x In
1 Finer resolution settings are possible with Ecoreach software and Masterpact MTZ mobile App
Protection Characteristics for Micrologic 5.0 X, 6.0 X, 7.0 X
Characteristic
Unit
Ii type is set to Standard
Ii type is set to Fast
Breaktime at 2 x threshold
ms
≤ 50
≤ 30
Non-tripping time
ms
> 20
Accuracy on threshold
+/- 10
+/- 10
Predefined Events
The function generates the following predefined events:
Event
History
Severity
Ii trip
Trip
High
Ii operate
Protection
Medium
Predefined events cannot be modified by the user. For general information on events, refer to Event
Management (see page 163).
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71
Protection Functions
Ground-Fault Protection (G or ANSI Code 50G/51G)
Presentation
Ground-fault protection ensures protection against phase-to-ground fault, which is more sensitive than
protection based on phase current only. It is generally used in TN-S systems but could also be used in
other earthing systems. Ground-fault protection is based either on the summation of the phases and
neutral current or on the signal delivered by an external sensor, source ground return (SGR) current
transformer through the MDGF module.
NOTE: Ground-fault protection is also called earth-fault protection.
Availability
Ground-fault protection is available on:
 Micrologic 6.0 X control units
 3-pole and 4-pole circuit breakers
External sensors can be used:
Source ground return protection: including ground-fault protection and an SGR sensor installed around
the connection of the transformer neutral point to ground.
 External Neutral Current Transformer (ENCT): measurement of the current on neutral

Ground-fault protection is powered by the current flowing through the internal current transformers of the
circuit breaker and it does not require an additional external power supply.
Operating Principle
The ground-fault current is calculated or measured according to the circuit breaker configuration, as shown
in the following table.
Circuit breaker configuration
Ig ground-fault current
3P
Ig = I1 + I2 + I3
4P
Ig = I1 + I2 + I3 + IN
3P + ENCT
Ig = I1 + I2 + I3 + IN (ENCT)
3P or 4P + SGR
Ig = ISGR
The ground-fault protection threshold Ig sets the level of ground-fault current at which
the circuit breaker trips when reaching the ground-fault protection time delay tg.
The time delay tg sets the length of time during which the circuit breaker carries a
ground-fault within the ground-fault protection threshold Ig range.
The time delay tg can be adjusted to:
 Four setting values with I²t ON. In this case, the tripping curve is an inverse time
curve up to 2 x Ir, meaning that the time delay decreases as the current increases.
Above 2 x Ir, the tripping curve is a definite time curve with a constant tripping time.
 Five setting values with I²t OFF. In this case, the tripping curve is a definite time
curve with a constant tripping time.
Ground-fault protection is based on the true RMS current of phases and neutral, up to harmonic 15.
In order to trip on an intermittent fault, the control unit accumulates the intermittent currents in the groundfault tripping range that do not last long enough to trigger a trip. This accumulation leads to shorter tripping
times than those set.
Setting the Protection
Ground-fault protection can be enabled or disabled.
The ground-fault protection settings are:
 Ig enable
 Ig ground-fault protection threshold
 tg ground-fault protection time delay
 Ground-fault protection curve (I²t ON or I²t OFF)
They can be set as follows:
On the Micrologic X display screen, at Home → Protection → I Ground Fault
 With Ecoreach software

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Protection Functions


With Masterpact MTZ mobile App
By sending a setting command using the communication network. This function is password-protected.
The ground-fault protection can be duplicated when dual settings are activated (see page 78).
Protection Settings
Setting
Unit
Range
Step
Ig enable
–
ON / OFF
–
Ig threshold
0.2–1 x In
In1
0.1 x
Factory setting
Accuracy
ON
–
0.2 x In
+/– 10%
1 Finer resolution settings are possible with Ecoreach software and Masterpact MTZ mobile App
Setting
Unit
Setting Value
tg with I²t OFF
0.1
0.2
0.3
0.4
tg with I²t ON
–
0.1
0.2
0.3
0.4
Non-tripping time
> 0.02
> 0.08
> 0.14
> 0.23
> 0.36
Maximum breaking time
< 0.08
< 0.14
< 0.20
< 0.32
< 0.50
The default tg time delay setting value is 0 s with I²t OFF.
Testing the Protection
Test the operation of ground-fault protection as follows:
Step
Action
Check that the circuit breaker is closed and the control unit is supplied with power (ready LED is
flashing).
Press the test button (T) on the front face of the Micrologic X control unit. This action is recorded as an
event.
The circuit breaker trips. An event is generated.
If the circuit breaker does not trip, an event is generated. Contact your field service representative.
Zone Selective Interlocking (ZSI)
The ZSI characteristics and external wiring of the zone selective interlocking function, are described
specifically (see page 80).
If ZSI IN is not set to 1(open circuit between Z3 and Z4 terminals), the maximum breaking time is 0.08 s
regardless of the tg setting value.
When ZSI IN is set to 1 and connected to the ZSI OUT of a downstream device (or when ZSI is not used,
there is a jumper between the Z3 and Z4 terminals), the tg time delay is used.
The Ig pick up activates ZSI OUT (Z1 and Z2 terminals).
NOTE: Masterpact MTZ circuit breakers are delivered with a jumper installed between Z3 and Z4.
Predefined Events
The function generates the following predefined events:
Event
History
Severity
Ig trip
Trip
High
I∆n/Ig test trip
Trip
High
Ig start
Protection
Low
Ig operate
Protection
Medium
I∆n/Ig test button pressed
Diagnostic
Low
I∆n/Ig test trip failed
Diagnostic
High
Predefined events cannot be modified by the user. For general information on events, refer to Event
Management (see page 163).
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73
Protection Functions
Earth-Leakage Protection (ANSI Code 50G/51G)
Presentation
Earth-leakage protection is a protection against earth fault with a very high sensitivity. It is generally used
in TT or IT earthing systems but could also be used in TN earthing systems in some circumstances. Earthleakage protection is a residual current protection based on current measured by a rectangular sensor
encompassing the three phases or the three phases and neutral. Micrologic 7.0 X earth-leakage protection
with VPS module complies with IEC 60947-2 Annex B. It is a type A residual-current device (RCD).
Availability
Earth-leakage protection is available on:
 Micrologic 7.0 X control units connected to an external rectangular sensor
 3-pole and 4-pole circuit breakers
The external rectangular sensor is required to measure the residual current.
The VPS voltage power supply module is delivered with Micrologic 7.0 X control units to supply power to
the control unit in case of a low level fault and no load, where the power supply based on current flowing
through the circuit breaker is not high enough.
The VPS is mandatory to comply with IEC 60947-2 Annex B.
Operating Principle
Earth-leakage protection is definite time.
The earth-leakage protection threshold IΔn sets the level of earth-leakage at which the circuit breaker
trips when reaching the earth-leakage protection time delay tΔn.
Setting the Protection
The earth-leakage protection settings are:
IΔn earth-leakage protection threshold
 tΔn earth-leakage protection time delay

They can be set as follows:
On the Micrologic X display screen, at Home → Protection → I Earth Leakage
 With Ecoreach software
 With Masterpact MTZ mobile App
 By sending a setting command using the communication network.

Protection Settings
Setting
Unit
Range
Step
Factory setting
IΔn threshold
0.5 – 30
0.1
0.5
Setting
Unit
Setting Value
tΔn time delay
0.06
0.15
0.23
0.35
0.80
Non-tripping time
> 0.06
> 0.15
> 0.23
> 0.35
> 0.80
Maximum breaking time
< 0.14
< 0.23
< 0.35
< 0.80
< 1.00
Testing the Protection
Test the operation of earth-leakage protection as follows:
Step
74
Action
Check that the circuit breaker is closed and the control unit is supplied with power (ready LED is
flashing).
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Protection Functions
Step
Action
Press the test button (T) on the front face of the Micrologic X control unit. This action is recorded as an
event.
The circuit breaker trips. An event is generated.
If the circuit breaker does not trip, an event is generated. Contact your field service representative.
Predefined Events
The function generates the following predefined events:
Event
History
Severity
IΔn trip
Trip
High
I∆n/Ig est trip
Trip
High
IΔn start
Protection
Low
IΔn operate
Protection
Medium
I∆n/Ig test button pressed
Diagnostic
Low
I∆n/Ig test trip failed
Diagnostic
High
Predefined events cannot be modified by the user. For general information on events, refer to Event
Management (see page 164).
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75
Protection Functions
Neutral Protection
Presentation
A long time overcurrent protection function is dedicated to the neutral protection.
Availability
Neutral protection is available on:
 Micrologic 2.0 X, 5.0 X, 6.0 X, and 7.0 X control units
 3-pole circuit breakers with the ENCT option (External Neutral Current Transformer) to measure the
neutral current
 4-pole circuit breakers
Description
Where the cross-sectional area of the neutral conductor is at least equivalent to that of the phase
conductor, and the current in the neutral is expected not to exceed the value in the phase conductor, it is
not necessary to provide overcurrent protection for the neutral conductor.
The neutral conductor must have protection against short-circuit current if:
 The cross-sectional area of the neutral conductor is less than the cross-sectional area of the phase
conductors
 Non-linear loads generating third order harmonics (or multiples thereof) are installed
It may be necessary to switch off the neutral for operational reasons (multiple source diagram) or safety
reasons (working with power off).
To summarize, the neutral conductor can be:
 Non-distributed (3-pole circuit breaker)
 Distributed, not switched off and not protected (3-pole circuit breaker)
 Distributed, not switched off but protected (3-pole circuit breaker with ENCT option)
 Distributed, switched off and protected (4-pole circuit breaker)
Micrologic X control units are suitable for all protection types. They incorporate the OSN (Oversized
Neutral) function, which manages protection of the neutral conductor when third-order harmonic currents
(and multiples thereof) are present.
Circuit Breaker
Possible Types
Neutral Protection
3-pole circuit breaker
3P, 3D
Off
3-pole circuit breaker with ENCT
option
3P, 3D
Off
3P, 3D + N/2
Half neutral
4-pole circuit breaker
3P, 3D + N
Full neutral
3P, 3D + OSN
Oversized neutral
4P, 3D
Off
4P, 3D + N/2
Half neutral
4P, 4D
Full neutral
4P, 4D + OSN
Oversized neutral
P: Pole, D: Control unit, N: Neutral protection
Operating Principle
Neutral protection has the same characteristics as phase protection:
 Its threshold is proportional to the long-time protection threshold Ir.
 It has the same tr time delay values as long-time protection.
 Its short-time and instantaneous protections are identical.
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Protection Functions
Declaring the External Neutral Current Transformer (ENCT) on 3-Pole Circuit Breakers
On 3P circuit breakers the ENCT option must be declared in one of the following ways:
 On the Micrologic X display screen, at Home → Configuration → Measures → System Type → ENCT
 With Ecoreach software
 With Masterpact MTZ mobile App
 By sending a setting command using the communication network. This function is password-protected.
Setting the Neutral Protection for 3-Pole and 4-Pole Circuit Breakers
Set the type of neutral protection in one of the following ways:
 On the Micrologic X display screen, at Home → Protection → Neutral
 With Ecoreach software
 With Masterpact MTZ mobile App
 By sending a setting command using the communication network. This function is password-protected.
The table below shows the setting values of the neutral long-time protection and threshold for the type of
neutral protection selected:
Neutral protection type
Neutral long-time threshold value
OFF
No long-time protection for neutral
0.5
Ir/2
OSN
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Ir
3-pole (ENCT)
1.6 x Ir
4-pole
1.6 x Ir limited to In
77
Protection Functions
Dual Settings
Presentation
Dual settings function consists of two sets of parameters on the following protections, according to the type
of Micrologic X control unit:
 Long-time overcurrent protection
 Short-time overcurrent protection
 Instantaneous overcurrent protection
 Ground-fault protection
The user may switch from one set to the other under certain operating conditions. A typical application is
to adjust short-circuit protection when the circuit breaker can be supplied by two sources with very different
short-circuit currents. For example, the circuit breaker is supplied by either the grid or a generator.
Availability
The dual settings function is available on Micrologic 2.0 X, 5.0 X, 6.0 X, 7.0 X.
Operating Principle
When the dual settings function is enabled, two sets of protection parameters are available:
 Set A corresponds to the settings currently selected
 Set B is a new set of protection parameters, which can be set as described in Setting the Function
(see page 78).
Set B is activated as follows:
 On the Micrologic X display screen at Home → Maintenance → Switch to other set → Switch to set B.
 By sending a setting command using the communication network. For more information refer to the
Masterpact MTZ - Modbus Communication Guide.
 By a digital input provided by IO module. For more information refer to the IO Input/Output Application
Module for One Circuit Breaker - Instruction Sheet
Without an external command, Ir, tr, Isd, tsd, Ii, Ig, and tg settings are those of Set A.
When the Activate Set B external command is sent, the Ir, tr, Isd, tsd, Ii, Ig, and tg settings switch to those
of Set B.
When the Dual settings function is enabled, the settings on the display screen are marked _A or _B.
Activating Set B generates a low-level event, B curve active, which is logged in the protection history.
Setting the Function
The Set A protection parameters are set as follows:
 On the Micrologic X display screen, at Home → Protection
 With Ecoreach software
 With Masterpact MTZ mobile App
 By sending a setting command using the communication network. This function is password-protected.
The Set B protection parameters are set as follows:
On the Micrologic X display screen, at Home → Protection → Dual Settings
 With Ecoreach software
 With Masterpact MTZ mobile App
 By sending a setting command using the communication network. This function is password-protected.

Function Settings
Function
Settings
Factory settings
Setting range
Micrologic X version
Dual settings
Activation
NO
YES/NO
Micrologic 2.0 X,
5.0 X, 6.0 X, 7.0 X
Mode
Local HMI
 Local HMI
Micrologic 2.0 X,
5.0 X, 6.0 X, 7.0 X
 Module IO
 Remote Ctrl
78
Long-time Set B
Ir
1 x In
Same as set A
Short-time Set B
tr
0.5 s
Same as set A
Isd
1.5 Ir
Same as set A
tsd
Same as set A
Micrologic 2.0 X,
5.0 X, 6.0 X, 7.0 X
Micrologic 2.0 X,
5.0 X, 6.0 X, 7.0 X
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Protection Functions
Function
Settings
Factory settings
Setting range
Micrologic X version
Instantaneous Set B
Ii mode
ON
Same as set A
Micrologic 5.0 X,
6.0 X, 7.0 X
Ground-fault Set B
DOCA0102EN-00 05/2016
Ii type
Standard
Same as set A
Ii value
1.5 In
Same as set A
Ig mode
ON
Same as set A
Ig
0.2
Same as set A
tg
Same as set A
Micrologic 6.0 X
79
Protection Functions
Zone Selective Interlocking (ZSI)
Presentation
Zone-selective interlocking (ZSI), also called zone restraint, is a system designed to reduce the stress on
electrical distribution equipment during short-circuit or ground-fault conditions.
ZSI works with a previously coordinated distribution system to limit fault stress on the system by reducing
the time it takes to clear the fault while maintaining system coordination between overcurrent and groundfault protective devices.
ZSI allows Micrologic X control units to communicate with each other so that a short-circuit or ground-fault
can be isolated and cleared by the nearest upstream circuit breaker with no intentional time delay. Devices
in all other areas of the system (including upstream) remain closed to maintain service to unaffected loads.
Without ZSI, a coordinated system results in the circuit breaker closest to the fault clearing the fault, but
usually with an intentional delay. With ZSI, the device closest to the fault ignores its preset short-time and
ground-fault delays and clears the fault with no intentional delay.
Zone-selective interlocking eliminates intentional delay without sacrificing coordination and it results in
faster tripping times. This limits fault stress by reducing the amount of let-through energy the system is
subjected to during an overcurrent.
The use of ZSI does not cause circuit breakers that are not coordinated (due to improper settings) to
coordinate.
Availability
Zone-selective interlocking is available on Micrologic 5.0 X, 6.0 X, and 7.0 X control units.
For more information on compatibility and hard wiring, refer to the ZSI Instruction Sheet.
Masterpact circuit breakers with ZSI capability are shipped with self-restraint jumpers installed. Selfrestraint jumpers must be in place unless zone selective interlocking is activated. If jumpers are removed
and zone selective interlocking is not activated, the circuit breaker ignores its programmed delay and trips
with no intentional delay.
Operating Principle
A pilot wire interconnects a number of circuit breakers equipped with Micrologic X control units, as
illustrated in the following diagram.
The control unit detecting a fault sends a signal upstream and checks for a signal arriving from
downstream. If there is a signal from downstream, the circuit breaker remains closed for the full duration
of its tripping delay. If there is no signal from downstream, the circuit breaker opens immediately,
regardless of the tripping-delay setting.
Fault 1: Only circuit breaker A detects the fault. Because it receives no signal from downstream, it opens
immediately, regardless of its tripping delay set to 0.3.
Fault 2: Circuit breakers A and B detect the fault. Circuit breaker A receives a signal from circuit breaker B
and remains closed for the full duration of its tripping delay, set to 0.3. Circuit breaker B does not receive
a signal from downstream and opens immediately, in spite of its tripping delay set to 0.2.
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Protection Functions
Upstream
circuit breaker
Z1
Z2
Z3
Z4
tsd = 0.3
Fault 1
Z1
Z2
Z3
Z4
tsd = 0.2
Fault 2
Downstream
circuit breaker
Z1
Z2
Z3
Z4
Z1
Z2
Z3
Z4
NOTE: On device A, the tsd and tg tripping delays must not be set to zero because this would make
selectivity impossible.
Setting the Function
The following settings can be assigned to the ZSI input:
 Ground-fault protection (Micrologic 6.0 X)
 Short-time overcurrent protection
 Both protections (factory setting)
Setting changes can be made as follows:
 With Ecoreach software
 By sending a setting command using the communication network. This function is password-protected.
Predefined Events
The function generates the following event:
Event
History
Severity
ZSI test
Diagnostic
Low
Connection Principles
The figure below explains how the signal wire is connected to the Micrologic X control unit:
Q1
Z1
Z2
Z3
Z4
Q1
Q2
Q3
Z1
Z2
Z3
Z4
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Q2
Z1
Z2
Q3
Z3
Z4
Z1
Z2
Z3
Z4
Upstream circuit breaker
Circuit breaker to be wired
Downstream circuit breaker
ZSI-OUT source
ZSI-OUT
ZSI-IN source
ZSI-IN
81
Protection Functions
NOTE: When ZSI is not used downstream, short circuit inputs Z3 and Z4. The setting of the short-time and
ground-fault protection time delays can be inhibited if this principle is not applied.
Multi-Source Distribution
If a number of circuit breakers are installed upstream (multi-source distribution), the same principles apply.
tsd = 0.3
tsd = 0.3
tsd = 0.2
tsd = 0.1
NOTE: Management of this configuration does not require any additional relays to ensure that ZSI is
controlled for the sources used.
Connection Wire Characteristics
The table below indicates the characteristics of the inter-device signal wire:
Characteristics
Values
Impedance
2.7 Ω per 300 m
Maximum length
300 m
Type of cable
Shielded twisted (Belden 8441 or equivalent)
Permissible conductor cross-section
0.4–2.5 mm 2
Interconnection limit on inputs Z3 and Z4 (to downstream
devices)
15 devices
Interconnection limit on outputs Z1 and Z2 (to upstream
devices)
5 devices
ZSI Interface Module
For more information about the ZSI Interface module, refer to the ZSI Interface Module Instruction Sheet.
Testing the ZSI Function
The ZSI function can be tested using Ecoreach software, as follows:
Step
82
Action
Result
Use Ecoreach to test the tripping time of short-time
overcurrent protection and/or ground-fault protection of
upstream Masterpact MTZ with a jumper between Z3 - Z4
The tripping time should be equal to tsd
and/or tg
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Protection Functions
Step
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Action
Result
Use Ecoreach to test the tripping time of short-time
overcurrent protection and/or ground-fault protection of
downstream Masterpact MTZ
The tripping time should be equal to tsd
and/or tg
Remove Jumper between Z3-Z4 of upstream
Masterpact MTZ and connect wiring from downstream
Masterpact MTZ Z1-Z2.
–
Test wiring between downstream Masterpact MTZ and
upstream Masterpact MTZ by using Ecoreach connected
to downstream Masterpact MTZ
The trip cause indication LEDs of the
upstream Masterpact MTZ blink
83
Protection Functions
Section 3.3
Setting Guidelines
Setting Guidelines
What Is in This Section?
This section contains the following topics:
Topic
Protection Setting Guidelines
84
Page
85
Setting the Long-Time Overcurrent Protection (L or ANSI Code 49RMS)
87
Setting the Short-Time Overcurrent Protection (S or ANSI Code 51)
90
Setting the Instantaneous Overcurrent Protection (I or ANSI Code 50)
92
Selectivity
93
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Protection Functions
Protection Setting Guidelines
Presentation
The setting of overcurrent protection relies on installation short-circuit and fault calculation. The setting
guideline cannot replace this calculation.
Masterpact MTZ circuit breakers with Micrologic X control units offer setting flexibility to ensure the
required overcurrent protection whilst maintaining selectivity and stability on transient phenomena when
necessary.
For each circuit, the installation designer needs to provide the following:
 Iz: continuous current capacity of the circuit
 Ifault min: minimum fault current at the end of the circuit depending on earthing system
 Tmax short-circuit: maximum time for maximum short-circuit current
Guidelines are given for the following settings:
Ir: long-time overcurrent protection threshold
 tr: long-time overcurrent protection time delay
 Isd: short-time overcurrent protection threshold
 tsd: short-time overcurrent protection time delay

Overcurrent Protection Setting Guidelines by Application
The following table gives the guidelines for overcurrent protection setting by application:
Application
Micrologic 2.0 X
Micrologic 5.0 X, 6.0 X, 7.0 X1
Secondary side of MV/LV transformer
(switchboard main incomer) with other
Masterpact or Compact NS 630–
3200 A downstream as feeder
Ir = Iz
tr ≤ 24 s
Isd ≤ Ifault min
No selectivity possible with feeders
except Compact NSX
Ir = Iz
tr ≤ 24 s
Isd ≤ Ifault min
tsd < Tmax short-circuit
tsd > tsd of downstream Masterpact or
Compact NS 630–3200 A
Ii enable: OFF
Secondary side of MV/LV transformer Ir = Iz
(switchboard main incomer) without
tr ≤ 24 s
other Masterpact or Compact
Isd ≤ Ifault min
NS 630–3200 A downstream as
feeder
Ir = Iz
tr ≤ 24 s
Isd ≤ Ifault min
tsd = 0
Ii enable: ON
Ii mode: Standard
Ii = Isd
Generator output
with other Masterpact or Compact
NS 630–3200 A downstream as
feeder
Ir = Iz
tr ≤ 1 s
Isd ≤ Ifault min
No selectivity possible with feeders
except Compact NSX
Ir = Iz
tr ≤ 1 s
Isd ≤ Ifault min
tsd > tsd of downstream Masterpact or
Compact NS 630–3200 A
Ii enable: OFF
Generator output
without other Masterpact or Compact
NS 630–3200 A downstream as
feeder
Ir = Iz
tr ≤ 1 s
Isd ≤ Ifault min
Ir = Iz
tr ≤ 1 s
Isd ≤ Ifault min
tsd = 0
Ii enable: ON
Ii mode: Standard
Ii = Isd
Feeder with other Masterpact or
Compact NS 630–3200 A
downstream
Ir = Iz
tr ≤ 16 s
Isd ≤ Ifault min
No selectivity possible except with
Compact NSX
Ir = Iz
tr ≤ 16 s
Isd ≤ Ifault min
tsd > tsd of downstream circuit
breaker
Ii enable: OFF
1 Ground-fault protection and earth-leakage protection depend on the earthing system and local regulations. As a
general rule ground-fault and earth-leakage sensitivity should be as low as possible without being disturbed by
permanent or transient leakage current.The ground-fault and earth-leakage time delay ensures selectivity with
downstream devices.
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85
Protection Functions
Application
Micrologic 2.0 X
Micrologic 5.0 X, 6.0 X, 7.0 X1
Feeder without other Masterpact or
Compact NS 630–3200 A
downstream as feeder
Ir = Iz
tr ≤ 16 s
Isd ≤ Ifault min
Ir = Iz
tr ≤ 16 s
Isd ≤ Ifault min
tsd = 0
Ii enable: ON
Ii mode: Standard
Ii = Isd
Power electronic (for example,
Ir = Iz
uninterruptible power supplies,
tr ≤ 8 s
variable speed drives, photovoltaic
Isd ≤ Ifault min
inverters) with no other circuit breaker
downstream
Ir = Iz
tr ≤ 16 s
Isd ≤ 1.5–2 x Ir
tsd = 0
Ii enable: ON
Ii mode: Fast
Ii = 2–3 x In
1 Ground-fault protection and earth-leakage protection depend on the earthing system and local regulations. As a
general rule ground-fault and earth-leakage sensitivity should be as low as possible without being disturbed by
permanent or transient leakage current.The ground-fault and earth-leakage time delay ensures selectivity with
downstream devices.
86
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Protection Functions
Setting the Long-Time Overcurrent Protection (L or ANSI Code 49RMS)
Setting Guidelines for Ir
The Ir setting depends on the maximum expected current flow through the breaker and the maximum
current that can be withstood by the protected equipment (for example, cables, busbars, generators, and
transformers).
The installation rules, such as IEC 60364 Chapter 4.43 or similar national standards, require overload
protection for conductors as follows:
l2= 1,2 lr <= 1,45 lz
lb lr lz 1,45x lz
l (A)
Ib Maximal load current
Ir Long time protection setting
Iz Continuous current-carrying capacity of the circuit
I2 Conventional operating current of the circuit breaker = 1.2 x Ir for Schneider Electronic control unit
I(A) Current through circuit breaker (phase(s) or neutral)
Setting Guidelines for tr
The tr setting depends on the maximum duration at maximum current and the maximum current that can
be withstood by the protected equipment (for example, cables, busbars, generators, and transformers).
Thermal memory: As described in long-time overcurrent protection (see page 65), this protection function
is an overcurrent time-dependent protection with thermal memory. It operates as a thermal image, using
the heating and cooling model of a conductor. It can be considered as a first order thermal model with one
heating time constant.
The following table shows the relationship between the tr setting and the thermal time constant of the first
thermal model:
tr setting (s)
Unit
0.5
Equivalent time constant for
seconds
heating and cooling when control
minutes
unit is energized
Time constant for cooling when
control unit is not energized
minutes
12
16
20
24
14
28
56
112
224
335
447
559
671
–
–
–
–
3.5
5.6
7.5
9.3
11.2
Summary of tr Setting Guidelines by Application
The following table gives the tr setting guidelines by application:
Application
Principle
Usual value
Secondary side of MV/LV transformer
(switchboard main incomer)
Tie circuit breaker between two
switchboards
tr ≤ 24 s
Tripping time according to circuit
thermal withstand for busbars, busbar
trunking, cable > 240 mm2:
 Time constant > 11 min
 tr = 24 s
When smaller cables are used in
parallel, a lower setting should be
used.
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87
Protection Functions
Application
Principle
Usual value
Generators
tr ≤ 1 s in order to achieve tripping
time < 30 s for 1.5 x Ir (IEC 60034-1
Clause 9.3.2)
tr ≤ 1 s
Feeder (cable or busbar trunking
protection)
Tripping time according to circuit
tr
thermal withstand for busbars, busbar  ≤ 24 s for busbar trunking or cable
≥240 mm²
trunking, cable > 240 mm2:
 ≤ 16 s for lower cross section
 Time constant >11 min
cables
 tr = 24 s
To achieve selectivity with incomer, it
can be useful to reduce tr.
Primary side of LV/LV transformer
According to cable or busbar trunking
withstand (transformer withstand is
generally higher)
To achieve selectivity with incomer, it
can be useful to reduce tr.
Power electronic (for example,
uninterruptible power supplies,
variable speed drives, photovoltaic
inverters)
Ir = Iz
tr ≤ 16 s
Isd ≤ Ifault min
tr
 ≤ 24 s for busbar trunking or cable
≥240 mm²
 ≤ 16 s for lower cross section
cables
tr
 ≤ 24 s for busbar trunking or cable
≥240 mm²
 ≤ 16 s for lower cross section
cables
Motors
If motor is protected against overload
by a separate relay, long time setting
is done according to circuit thermal
withstand.
If the Micrologic ensures also motor
thermal overload, motor class must be
taken in consideration.
tr
 = 12 s for a feeder
 ≥ 8 s for a class 10 motor
 ≥ 12 s for a class 20 motor
 ≥ 16 s for a class 30 motor
Example of tr setting according to the application:
lR = In
lZ
3 Ir
Generator thermal limit
Cable thermal limit
Protection setting generator tLT (minimum notch)
Protection setting cable tLT (maximum notch)
Neutral Protection Setting Guidelines
Some indications for setting neutral protection is given here. For more information refer to the neutral
protection section (see page 76).
The following table indicates the long-time protection settings according to the neutral cable cross section:
88
Cross-sectional area of neutral
conductor
Harmonics
expected
Neutral protection Long-time protection
setting
Less than cross-sectional area
of phase conductors
No
0.5
Ir is set according to Iz of cable, Ir applied to
neutral is divided by 2
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Protection Functions
Cross-sectional area of neutral
conductor
Harmonics
expected
Neutral protection Long-time protection
setting
Equal to cross-sectional area of
phase conductors
No
OFF
No harmonics expected: the protection of
neutral is not necessary
Yes
Harmonics expected: the neutral must be
protected by the long-time protection, set as for
the phase protection
No
OFF
No harmonics expected: the protection of
neutral is not necessary
Yes
Oversized neutral Harmonics expected: the neutral must be
protected by the long-time protection, set as for
the phase protection multiplied by 1.6 (OSN)
Greater than cross-sectional
area of phase conductors
NOTE: On 3-pole circuit breakers the ENCT option must be declared.
NOTE: In IT systems, a distributed neutral conductor must be protected. (0.5, 1 or OSN position)
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89
Protection Functions
Setting the Short-Time Overcurrent Protection (S or ANSI Code 51)
Settings Guideline
The Isd and tsd settings ensure that the short-time withstand current of protected equipment is not
exceeded.
Setting Guidelines for Isd
Application
Principle
Isd usual value
Secondary side of MV/LV transformer Lower than minimum short-circuit or ground10 x Ir
(switchboard main incomer or tie
fault current at the end of the protected circuit.
circuit breaker between two
Selectivity with downstream circuit breakers
switchboards)
Generators
Lower than minimum short-circuit or groundfault current supplied by the generator.
Selectivity with downstream circuit breakers
Feeder with other Masterpact or
Compact NS 630–3200 A
downstream
Lower than minimum short-circuit or ground10 x Ir
fault current at the end of the protected circuit.
Selectivity with downstream circuit breakers
Feeder without other Masterpact or
Compact NS 630–3200 A
downstream
Lower than minimum short-circuit or ground10 x Ir
fault current at the end of the protected circuit.
Selectivity with downstream circuit breakers
Primary side of LV/LV transformer
Lower than minimum secondary short-circuit
current.
Power electronic (for example,
uninterruptible power supplies,
variable speed drives, photovoltaic
inverters)
Lower than minimum short-circuit or ground1.5–2 x Ir
fault current at the end of the protected circuit.
Lower setting possible as no selectivity or
transient current is expected.
Motors
Lower than minimum short-circuit or ground10 x Ir
fault current at the end of the protected circuit.
Lower setting possible above starting current.
2–3 x Ir
10 x Ir
When LV/LV transformers are switched on, very high inrush currents are produced which must be taken
into account when choosing overcurrent protection devices. The peak value of the first current wave often
reaches 10 to 15 times the rated rms current of the transformer and may reach values of 20 to 25 times
the rated current even for transformers rated less than 50 kVA.
Example of inrush current: when transformer is switched on:
In
1st peak 10 to 25 x In
Example of inrush current of direct on line motor when started:
Id (5 – 8 In)
In
10 – 20 ms
90
td (1 – 10 s)
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Protection Functions
Setting Guidelines for tsd
tsd is set according to selectivity.
Time-based selectivity is ensured between two circuit breakers when the supply side circuit breaker shorttime delay is at least one step higher than the load side short-time delay.
When downstream circuit breakers are Compact NSX circuit breakers, selectivity is always ensured with
Masterpact MTZ with Micrologic 2.0 X control units, and with Micrologic 5.0 X, 6.0 X and 7.0 X control
units, for all values of tsd.
Short-time tripping time can be definite time type (tripping time is independent of current level) or time
dependent with I2t = constant curve. This function allows the curve to be smoothed for low level
overcurrent, ensuring fast trip at high current. This is recommended for selectivity with fuses.
Application
DOCA0102EN-00 05/2016
Principle
tsd usual value
Secondary side of MV/LV transformer Selectivity with downstream circuit
(switchboard main incomer or tie
breakers
circuit breaker between two
switchboards)
tsd > tsd of downstream power circuit
breaker (tsd = 0.2 s if installation
includes three levels of power circuit
breaker)
Feeder with selectivity with other
Masterpact MTZ or Compact > 630 A
downstream
Selectivity with downstream circuit
breakers
tsd > tsd of downstream power circuit
breaker (tsd = 0.1 s if installation
includes three levels of power circuit
breaker)
Feeder without selectivity with other
Masterpact MTZ or Compact > 630 A
downstream
No need for delayed short-time
protection
tsd = 0 s
Primary side of LV/LV transformer
Stability during inrush.
Selectivity with downstream circuit
breakers
tsd = 0.1 s or
tsd > tsd of downstream power circuit
breaker, if any
Power electronic (Uninterrupted
power supplies, variable speed
drives, photovoltaic inverters, etc.)
No need for delayed short-time
protection
tsd = 0 s
Motors
Stability during inrush
tsd = 0 s or 0.1 s
91
Protection Functions
Setting the Instantaneous Overcurrent Protection (I or ANSI Code 50)
Settings Guideline
Rules for Isd also apply to the Ii threshold.
Isd is set below the minimum value of short-circuit current and ground-fault in protected equipment:
Application
Principle
Usual value
Secondary side of MV/LV transformer Selectivity with downstream circuit
(switchboard main incomer)
breakers
Ii enable : OFF if other Masterpact
downstream
Ii = 15 x In if Compact NSX only
downstream
Feeder with selectivity with other
Masterpact or Compact > 630 A
downstream
Same rule as for Isd
Ii enable : OFF
Feeder without selectivity with other
Masterpact or Compact > 630 A
downstream
–
Ii enable : ON
Ii type : Standard
Ii = 10-15 x In
Primary side of LV/LV transformer
–
Ii enable : OFF
Generators
–
Ii enable : OFF
Power electronic (for example,
uninterruptible power supplies,
variable speed drives, photovoltaic
inverters)
Lower than minimum short-circuit or
ground-fault at the end of the
protected circuit. Lower setting
possible as no selectivity or transient
current is expected.
Ii enable : ON
Ii type : Fast
Ii = 2 x In
Motor
Lower than minimum short-circuit or
ground-fault at the end of the cable.
Lower setting possible above starting
current.
Ii enable : ON
Ii type : Fast
Ii ≥ 13 x Flc motor
Ii setting allows normal transient overcurrent inrush current for transformers:
In
1st peak 10 to 25 x In
Motor direct on line starting current:
Id (5 – 8 In)
In
10 – 20 ms
92
td (1 – 10 s)
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Protection Functions
Selectivity
Coordination Between Devices
Coordination between the upstream and downstream devices, especially selectivity, is essential to
optimize continuity of service. The large number of options for setting the protection functions on
Micrologic X control units improves the natural coordination between circuit breakers.
Three selectivity techniques can be used:
 Current selectivity, which corresponds to staging of the long-time overcurrent protection threshold.
 Time selectivity, which corresponds to staging of the short-time overcurrent protection threshold.
 Energy selectivity, which corresponds to staging of the circuit breaker energy levels: this applies for high
intensity short-circuit currents.
Selectivity Rules
The selectivity rules depend on:
 The type of control unit on the circuit breakers installed upstream and downstream: electronic or
thermal-magnetic.
 The accuracy of the settings.
Selectivity of Overcurrent Protection
For overcurrent protection, the selectivity rules between electronic control units are as follows:
 Current and time selectivity:
 A ratio of Ir Q1/Ir Q2 greater than or equal to 1.3 is sufficient between the Ir threshold for long-time
protection of the control unit on the upstream circuit breaker Q1 and that of the control unit on the
downstream circuit breaker Q2.
 The tr time delay for long-time protection of the control unit on the upstream circuit breaker Q1 is
identical or greater than that of the control unit on the downstream circuit breaker Q2.
 A ratio of 1.5 is sufficient between the Isd threshold for short-time protection of the control unit on the
upstream circuit breaker Q1 and that of the control unit on the downstream circuit breaker Q2.
 The tsd time delay for short-time protection of the control unit on the upstream circuit breaker Q1 is
greater than that of the control unit on the downstream circuit breaker Q2.
 If the upstream circuit breaker is in the I t off position, the downstream circuit breakers must not be
in the I2t on position.

Energy selectivity is provided by the circuit breaker design and build characteristics. The selectivity limit
can only be guaranteed by the manufacturer.
Ground-Fault Protection Selectivity
For ground-fault protection, only the rules for time selectivity should be applied to the Ig protection
threshold and tg time delay:
 A ratio of 1.3 is sufficient between the Ig threshold for ground-fault protection of the control unit on the
upstream circuit breaker Q1 and that of the control unit on the downstream circuit breaker Q2.
 The tg time delay for ground-fault protection of the control unit on the upstream circuit breaker Q1 is
greater than that of the control unit on the downstream circuit breaker Q2.
 If the upstream circuit breaker is in theI t off position, the downstream circuit breakers must not be in
theI2t on position.
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93
Protection Functions
Selectivity Limit
Depending on the staging of circuit breaker ratings and protection parameter settings, selectivity can be:
 Limited (partial selectivity) up to a value lower than the maximum expected short-circuit current.
 Total (total selectivity), performed irrespective of the value of the short-circuit current.
Selectivity Table
Schneider Electric provides selectivity tables showing the type of selectivity (partial or total) between each
circuit breaker for its entire range of circuit breakers (refer to the Complementary Technical
Information Catalog).
I2t ON/OFF Function
Use the I2t inverse time curve function to improve circuit breaker coordination. Use it when a protection
device using inverse time only is installed upstream or downstream, for example a fuse protection device.
I2t OFF
I2t ON
t(s)
t(s)
NS800N - Micrologic 5.0 A - 800 A
NS800N - Micrologic 5.0 A - 800 A
gG - 250 A
gG - 250 A
I (A)
94
I (A)
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Micrologic X
Metering Functions
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Chapter 4
Metering Functions
Metering Functions
What Is in This Chapter?
This chapter contains the following sections:
Section
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Topic
Page
4.1
Standard Metering Functions
96
4.2
Optional Metering Functions
129
95
Metering Functions
Section 4.1
Standard Metering Functions
Standard Metering Functions
What Is in This Section?
This section contains the following topics:
Topic
Measurement Accuracy in Accordance with IEC 61557-12
96
Page
97
Measurement Characteristics
102
Measurement Availability
107
Network Settings
113
Real-Time Measurements
114
Power Metering
117
Power Calculation Algorithm
120
Energy Metering
121
Harmonic Currents and Voltages
123
Power Quality Indicators
124
Power Factor PF and cos ϕ Measurement
126
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Metering Functions
Measurement Accuracy in Accordance with IEC 61557-12
Measurements and Electrical Parameters Available on the Micrologic X Control Unit
Based on the measurement of line currents, neutral current, phase-to-phase voltages, and phase-toneutral voltages, the Micrologic X control unit displays the following parameters:
 RMS values of currents and voltages
 Active, reactive, and apparent powers
 Active, reactive, and apparent energies
 Power factor
 Frequency
 Unbalance and THD of voltages and currents
Average and predicted values are calculated for the main basic electrical parameters.
The maximum and minimum values are time stamped and logged in the Micrologic X non-volatile memory.
They can be reset as follows:
 On the Micrologic X display screen
 With Ecoreach software
 With the Masterpact MTZ mobile App
 By a remote controller using the communication network
Electrical parameters, which are refreshed once a second, can be displayed as follows:
 On the Micrologic X display screen, at Home → Measures (see page 45)
 With Ecoreach software
 With the Masterpact MTZ mobile App
 By a remote controller using the communication network
The availability of parameters depends on the type of interface used to display data. All parameters are not
displayed on all interfaces (see page 107).
An optional external 24 Vdc supply or VPS module is mandatory to measure and display parameters,
including energy counters, for currents below 20% of the rated current.
Measurement Accuracy
Power and energy metering accuracy in Masterpact MTZ with Micrologic X control unit is classified as
Class 1, according to IEC 61557-12. This standard specifies performance requirements of measuring and
monitoring devices that measure and monitor the electrical parameters within electrical distribution
systems. It covers both performance measuring devices with external sensors (PMD-S), such as current
and/or voltage transformers, for example, stand-alone power meters, and performance measuring devices
with embedded sensors (PMD-D), for example, circuit breakers.
Masterpact MTZ, with Micrologic X control unit and embedded sensors, is a PMD-DD device with Class 1
accuracy, according to IEC 61557-12 for power and energy metering. It complies with the requirements of
K70 temperature class, according to table 6 of IEC 61557-12.
The IEC 61557-12 standard defines the following three levels of uncertainty that need to be checked to
establish accuracy class:
 Intrinsic uncertainty (see page 98)
 Operating uncertainty (see page 99)
 Overall system uncertainty (see page 100)
A PMD-DD device avoids overall system uncertainty and variation, thanks to its embedded sensors and
wiring.
Measured Electrical Parameter Uncertainty
Uncertainty is the estimated percentage by which a measured electrical parameter may differ from the true
electrical parameter. In the context of this standard, the total uncertainty of a measured electrical
parameter depends on the instrument, the environment, and other elements to be considered.
The graphic below shows the total uncertainty of a measured electrical parameter made by:
 A PMD-D device, with embedded sensors
 A PMD-S device, with external sensors
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Metering Functions
PMD-D device, with embedded sensors
PMD-S device, with external sensors
Uncertainty under reference conditions: Intrinsic uncertainty according to IEC 61557-12
Variations due to influence quantity: Operating Uncertainty according to IEC 61557-1;
Measurement uncertainty according to IEC 61000-4-30
Overall system uncertainty according to IEC 61557-12
Intrinsic Uncertainty: IEC 61557-12 definition
Intrinsic uncertainty is the uncertainty of a measuring instrument when used under reference conditions. In
the context of this standard, it is a percentage of the measured electrical parameter defined within the rated
range of the measuring instrument.
For Masterpact MTZ with Micrologic X control unit, the main values are current and power factor.
The following table indicates the current range for different Masterpact MTZ circuit breakers, to ensure
uncertainty is less than or equal to 1%:
98
Current values for active power with 1% uncertainty (in A)
Masterpact
Description of current value
Current value
as percentage
of maximal
load current
MTZ1
MTZ2
MTZ3
Lowest value of the current at which the circuit
breaker starts and continues to register
Ist = 0.04% Ib
1.6 A
1.6 A
3.2 A
Lowest value of the current to ensure accuracy
less than or equal to 1.5% for active power and
energy
5% Ib
20 A
20 A
40 A
Lowest value of the current to ensure accuracy
less than or equal to 1% for active power and
energy with PF = 1
10% Ib
40 A
40 A
80 A
Lowest value of the current to ensure accuracy
less than or equal to 1% for active power and
energy with PF = 0.5 Ind to 0.8 Cap
20% Ib
80 A
80 A
160 A
Value of current in accordance with which the
relevant performance of a direct connected PMD
(PMD Dx) is fixed
Ib
400 A
400 A
800 A
Highest value of current at which the
Masterpact MTZ meets the uncertainty
requirements of this standard
Imax
1600 A x 1.2
4000 A x 1.2
6300 A x 1.2
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Metering Functions
Intrinsic uncertainty for active power and energy versus current. Example graph for Masterpact MTZ2
No
load
Istart
Imin 1.5 %
Out of
range
Imin 1 %
1.6 20
40
4000
Current (A)
Masterpact MTZ2
Standard
Out of standard
Operating Uncertainty
IEC 61557-12 defines operating uncertainty as uncertainty under the rated operating conditions.
IEC 61557-12 specifies tests and maximum variation of uncertainty according to the following influence
quantities:
 Ambient temperature (T°)
 Frequency, unbalance, harmonics, EMC
For Masterpact MTZ with Micrologic X control unit, the main influence quantity is temperature.
Masterpact MTZ devices are designed to carry high currents, which induce self-heating. The measurement
has been designed to offer high stability in a wide range of temperatures.
Effect of Temperature on Masterpact MTZ Measurement System
The temperature variation around the internal current transformer and the Micrologic X control unit,
between minimum current and nominal current load can be up to 90 K. The effect of temperature on
measurement accuracy has been carefully managed to ensure an operating ambient temperature of
between -25 °C and 70 °C (-13 °F and 158 °F).
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Metering Functions
Accuracy (%)
Masterpact MTZ
-1
-2
-3
-4
-5
-25
Temperature (°C)
-15
-5
15
25
35
45
55
65
Uncertainty min/max PF 1
Masterpact MTZ
Uncertainty min/max PF 0.5
Standard
Out of standard
Effect of Electromagnetic Compatibility (EMC) and Other Influence Quantities on Masterpact MTZ Measurement Performance
Masterpact MTZ with Micrologic X control unit offers a high immunity to influence quantities, with a low
operating uncertainty for active power, as specified by Class 1, for a wide range of operating conditions.
The following table summarizes standard requirements and Masterpact MTZ performance with regard to
influence quantities for active power:
Influence quantity
Ambient temperature
Table 9 IEC 61557-12 PMD DD Cl 1
additional uncertainty variation tolerance
Masterpact MTZ
additional uncertainty
PF 1
0.05% / K
< 0.01% / K
PF 0.5 Ind
0.07% / K
< 0.01% / K
Auxiliary power supply
24 Vdc ±15%
0.1%
0%
Voltage
PF 1: 80% / 120% Un
0.7%
0%
PF 0,5 Ind: 80% / 120% Un
1%
0%
PF 1: 49–51 Hz / 59–61 Hz
0.5%
0%
Frequency
PF 0.5: 49–51 Hz / 59–61 Hz
Reversed phase sequence
0.7%
0%
1.5%
0%
Voltage unbalance
0 to 10%
2%
0%
Phase missing
1 or 2 phase missing
2%
0%
10% Un 5th
0.8%
< 0.1%
Odd harmonic in current
3%
< 0.1%
Sub harmonic in current
3%
< 0.1%
Common mode voltage rejection
0–690 Vac / ground
0.5%
0%
Permanent ac magnetic induction
IEC 61326
2%
0%
Harmonics in current and voltage
20% Imax 5th
Electromagnetic RF fields
IEC 61326
2%
< 1%
Conducted disturbances induced by
RF fields
IEC 61326
2%
< 1%
Overall System Uncertainty
IEC 61557-12 defines overall system uncertainty as uncertainty including the instrumental uncertainty of
several separated instruments (for example, sensors, wires, measuring instruments) under the rated
operating conditions.
100
DOCA0102EN-00 05/2016

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