Itron 50ESS Electric Utility Meter Module User Manual Marketing ation

Itron, Inc. Electric Utility Meter Module Marketing ation

Contents

Marketing documentation

Internal Design Concept A3 ALPHA® Meter with SSD ERT® For many years, Itron ERT® devices have provided an economic method to collect consumption data from electricity meters. Until now, however, there has been no similar solution for collecting billing data from demand metered accounts. An ABB A3 ALPHA® meter equipped with an under–the–cover Itron Solid State Demand (SSD) ERT solves this problem. The SSD ERT is designed to fit under the cover of the A3 ALPHA meter to simplify installation and reduce costs. An A3T ALPHA meter (TOU meter) equipped with a SSD ERT performs automatic scheduled self reads (with demand resets). The SSD ERT retrieves all billing data directly from the meter registers and transmits the following information: • previous billing period consumption value (kWh) • previous billing period maximum demand value (kW) • date of last demand reset Because the SSD ERT is always reporting the data from end of the previous billing period, you have a full billing cycle to collect the data. The SSD ERT for the A3 ALPHA functions similarly to the Itron 41ER-1 ERT and continuously bubbles up these data elements in three different SCMs (Standard Consumption Messages). The data may be collected with any of the following Itron reading systems: • Handheld OMR (includes PremierPlus 4, Integrator, & MVRS) • Mobile AMR • Fixed Network As additional security for the billing data, the A3 ALPHA meter will store 15 self reads that contain the billing data for the last 15 months. Meter Status Included in the SCM messages are multiple error, warning, or status flags that provide key information about the site conditions and enable you to detect possible tamper conditions. • Standard ERT Meter Removal & Inversion Tamper Flags – Always Included in SCMs • Examples of up to four additional flags in SCMs (actual list to be determined): • End of Calendar Warning • Internal Meter Error • Phase Outage Warning • Low Battery Warning • Reverse Power Flow Warning Read Schedules The A3T ALPHA meter provides an extensive and flexible calendar permitting the use of both recurring and nonrecurring dates. This calendar is used to define the read schedules (demand reset dates) for meters with an SSD ERT. Using ABB’s Metercat™ software you can create and define a calendar schedule for each read cycle. • If the read calendar is completely defined using “recurring dates” then a perpetual calendar will exist in the meter and no calendar updates will be necessary. • If no recurring dates can be defined, the A3 ALPHA can provide up to 10 years of scheduled non-recurring monthly resets.
208 S. Rogers Lane Raleigh, NC 27610 Website: www.abb.com/metering © 2001 by ABB Automation Inc. Printed March 2001. All rights reserved. 2818 North Sullivan Road Spokane, WA 99216 Website: www.itron.com A3 ALPHA Meter The A3 ALPHA meter is the newest addition to ABB’s line of ALPHA electricity meters. The A3 ALPHA meter builds upon the strengths of existing ALPHA meter designs. Like its predecessors, the A3 ALPHA uses ABB’s patented digital measurement techniques that offer high accuracy, repeatability, and low ownership costs. In support of open architecture standards, the A3 ALPHA meter is the first ABB meter with full ANSI C12.18, C12.19, and C12.21 communication protocol support. A standard A3T ALPHA meter is used to support the SSD ERT. Should your AMR needs change in the future, this meter, like all A3 ALPHA meters, can be upgraded to support the functionality and communication options that you require. Alpha Key Upgrades Communication Options • Reactive metering • Advanced four quadrant metering • Loss compensation • PQM • Load profiling • Instrumentation profiling • Internal modem • RS232 • RS485 • External serial interface • 20mA current loop The A3 ALPHA supplies many standard features such as: • Self reads (15 self-reads may be kept at all times) • Over 50 different instrumentation display quantities • System service checks • Class 0.2 accuracy for transformer rated and self-contained A3 ALPHA Meter Forms Available with SSD ERT Single phase - 1S, 2S, 3S, 4S Polyphase - 35S, 36S, 9S, 12S, 16S A3 ALPHA Technical Specifications Operating Ranges Voltage Nameplate nominal range Operating range 120V-480V 96V-528V Current 0 to Class amperes Frequency Nominal 50 or 60Hz ±5% Temperature range -40° to 85°C inside meter cover Humidity range 0 to 100% non-condensing General Performance Characteristics Starting Current Form 1S and Form 3S 10mA for Class 20 100mA for Class 200 160mA for Class 320 All other forms 5mA for Class 20 50mA for Class 200 80mA for Class 320 Startup delay <3s from power application to pulse accumulation Creep 0.000A (no current) No more than one pulse measured per quantity, conforming to ANSI C12.1 requirements Primary time base Power line frequency (50 or 60Hz), with selectable crystal oscillator Secondary time base Meets the ANSI limit of 0.02% using the 32.768kHz crystal. Initial performance is expected to be equal to or better than ±55 seconds per month at room temperature Outage carryover capacity 6 hours at 25°C. Supercapacitor rated at 0.1 Farads, 5.5V Battery (optional) LiSOCl2 battery rated 800mAhr, 3.6V and shelf life of 20+ years. 5 years continuous duty at 25°C Communications baud Optical port 9600 baud (nominal) Remote port 1200 to 19,200 BPS ANSI Standards C12.1 C12.10 C12.20 C12.18 C12.19 C12.21 SSD ERT Technical Specifications Transmit Frequency Spread spectrum 910-920 MHz Data Integrity Verified in every data message Operating Temperature -40°– +85° C Operating Humidity 5 to 95% non-condensing relative humidity FCC Compliance Part 15 certified ANSI Compliance Meets or exceeds ANSI C12.1 Standards Disclaimer: Information in this data sheet is based on the development intent of ABB Automation Inc. and Itron, Inc. This information is subject to change during the course of product development.

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