Vigirex Ground Fault Relays

2014-11-11

• Please Note
  • Electrical equipment should be installed, operated, serviced, and maintained only by qualified pe...
• Section 1—Introduction
  • Vigirex™ Ground-fault Relays with Separate Toroids
  • Overview
    • • Protection against equipment damage
  • Characteristics
    • • UL 1053 Listed
      • — red LED: fault
  • Operation
  • Function
    • • Ground-fault protection (RH10, RH21, RH99 with manual reset)
  • Ground-Fault Protection
    • • equipment and property against fire; and
  • Earth-Leakage Monitoring (Alarming)
  • Application Examples
    • Figure 1: Types of Protection
  • Optimized Protection and Continuity of Service
  • Continuous Self-Monitoring of Vigirex Relays
    • • Internal electronics
  • Sensors
    • • IEC 60068-2-30 and IEC 60068-2-56: damp heat
  • Compliance with Standards
    • • UL 1053
• Section 2—Vigirex Ground-fault Relays System Overview
  • Introduction
    • • Panel-mount or DIN-mount installation
  • Operation
  • Vigirex ground-fault relays are not designed to protect people as defined by UL 943 Class A. Vigi...
    • • Vigirex Ground-Fault Relay—This has control power inputs, inputs from the sensor, outputs to th...
      • Figure 2: Vigirex Ground-Fault Protection System
  • Testing Locally or Remotely, With or Without Tripping
  • Benefits to the Equipment User
  • Table 1: Benefits for the End-Use Customer
  • How can manufacturers be sure equipment has this benefit?
    • • Purchase only equipment that has adequate ground-fault protection
  • Benefits to the manufacturer of equipment (OEM)
    • • Provides a better machine for their customers, creating a competitive advantage
  • Table 2: Benefits for the OEM
  • Selection Criteria for Relays
  • Mounting / Packaging—RH10M, RH21M, RH99M, and RH10P, RH21P, RH99P
  • Control Voltage
    • • 12–24 Vac (50/60 Hz) / 12-48 Vdc
  • Time Delays
    • • RH10—Instantaneous (fixed)
  • Sensitivity (Tripping Threshold)
    • • RH10—Fixed at 30 mA, 100 mA, 300 mA, 500 mA, or 1 A
  • Manual or Automatic Reset
    • • Manual reset—The only version of RH10 and RH21; available in certain models of RH99
  • Selection Criteria for Sensors
  • Closed Toroid Sensors
    • • Window diameters from 30 mm (1.18 in.)–300 mm (11.8 in.)
  • Split Toroid Sensors
    • • Window diameters of 46 mm (1.81 in.) and 110 mm (4.33 mm)
  • Rectangular Sensors
    • • 1200 A – 280 x 115 mm (11 x 4.5 in.)
  • Table 3: Vigirex Ground-Fault Relays (UL 1053)
  • Table 4: Sensors for Vigirex Ground-Fault Relays
• Section 3—Relay Characteristics
  • Optimum Continuity of Service
  • The Vigirex range of ground-fault relays offers multiple setting possibilities that may be used t...
  • Provisions to minimize downtime of the Vigirex relay include:
    • • Reduced tripping tolerances
    • Reduced Tripping Tolerances
  • The Vigirex relays trip between 80% and 100% of their tripping threshold (IDn) thus increasing im...
    • Dependable Power Supply
  • A range of power supplies is available, including a low voltage unit for operation from AC or DC ...
    • • 12–24 Vac / 12–48 Vdc
    • Voltage-dip withstand capacity: The Vigirex relay will operate correctly at 55% of the rated cont...
  • Additional standard functions are available to make the protection as dependable as possible:
    • • Disconnect of the circuit if the relay fails, by using the Normally Closed (NC) output contacts...
  • Vigirex relays are not affected by micro-outages lasting less than 60 ms. The maximum break time ...
    • Continuous Self-Monitoring
  • Vigirex relays continuously monitor the power supply, relay / sensor link and internal electronic...
    • Table 5: Test and Reset Functions
      • Tests With or Without Tripping
  • The Vigirex relay can be manually tested as part of a maintenance routine. This procedure can be ...
  • Either method can be used locally (with front-panel push buttons) or remotely via the Test and Re...
    • Operation in Less Than 50 Milliseconds
  • If a Vigirex relay with a 30 mA setting is used to shunt trip a Schneider Electric / Square D Com...
    • Reduced Nuisance Tripping
  • The electronic design of the Vigirex relay provides several functions to minimize outages and eli...
    • • Inverse-time tripping curve
    • Inverse-Time Tripping curve
  • The inverse-time tripping curve of the Vigirex relays (see Figure 3) affects performance in two b...
    • • Protection is optimized because the higher the ground-fault current it detects, the faster the ...
  • Also, when circuits are energized, the inverse-time tripping curve avoids nuisance tripping due t...
    • • the high transient currents caused by certain loads (motors, LV/LV transformers, etc.) and
      • Figure 3: Vigirex Inverse-Time Tripping Curve
    • RMS Measurements of Ground-Fault Current
  • Vigirex devices use rms measurements for the zero-sequence currents. This is the means to:
    • • accurately measure the harmonic currents and avoid nuisance tripping due to non-dangerous curre...
    • Frequency Filtering
  • Frequency filtering by Vigirex residual current relays ensures maximum protection against insulat...
  • Frequency converters (e.g. variable-speed drives) generate significant levels of high-frequency l...
    • Figure 4: Frequency Filtering
    • Electromagnetic Disturbances
  • Vigirex relays are designed to optimize immunity to:
    • • overvoltages produced by switching (e.g. lighting circuits)
  • To ensure optimal immunity, Vigirex relays are tested in compliance with the following standards:
    • • IEC/EN 60947-2: low-voltage switchgear and controlgear, Part 2: circuit breakers)
  • The high immunity levels of Vigirex relays ensure optimum safety without nuisance tripping.
    • Test and Reset of Relay
    • Test
  • According to the National Electrical Code (NEC), a test is required after installation to check c...
  • The purpose of the test is to check:
    • • the output contacts
      • — the complete protection system with actuation of the output contacts (this shuts down the insta...
    • Reset
  • Whatever the test mode, a reset clears the fault stored in memory and resets the LEDs and the rel...
    • Table 6: Test and Reset Modes
      • Switchboard Acceptance Tests
  • During acceptance of a switchboard or other electrical equipment and prior to dielectric testing,...
  • Vigirex relays are supplied with a plug-in connector for easy and secure connection and disconnec...
    • Figure 5: Supply Connections for the DIN and Front-Panel Mount Formats
    • Mounting of Vigirex Relays
  • The Vigirex relays can be mounted in a variety of ways:
    • Figure 6: RH Device with Mounting Clips Secured to a Mounting Plate
    • Figure 7: RH-P Front-Panel Mounted Device
    • Figure 8: RH-M Device Mounted on a DIN Rail
    • Figure 9: RH-M with Clip-on Toroid
  • Plug in connectors allow easy and secure disconnection of control panel for switchboard acceptanc...
  • DIN-format Vigirex relays can be equipped with toroids from 1–2 in. (30–50 mm) in diameter.
    • Table 7: Characteristics
  • —
    • Figure 10: Tripping Curves—RH10, RH21, and RH99
    • Instantaneous Relay
• Section 4—Sensors
  • Introduction
    • • Closed toroids are suitable for new installations up to 630 A. (Certain toroids may be mounted ...
      • Figure 11: A Type Closed Toroid SA200
      • Figure 12: POA Split Toroid
      • Figure 13: Rectangular Sensor
      • Figure 14: Plug-on TA30 Type Toroid
  • Measurement Dynamics
    • • a material with high magnetic permeability and its saturation phenomena;
      • — sufficiently low resistance
  • Measurement Limits
  • Rated Operational Current of the Sensors
    • • is indicated for the minimum setting value at 30 mA
  • Selection of Toroid and Rectangular Sensors, Depending on the Power Circuit
    • • use the same sensor but with a magnetic sleeve to channel the flux;
  • Special Precautions In Severe Electrical Noise Environment
    • • greater distance between the toroid wires and power circuits;
    • • mild steel foil 0.1 mm thick to be wrapped several times around the cable inside the toroid (mi...
  • Connection Between Vigirex Relays and Sensors
    • Table 8: Wiring Characteristics
    • Table 9: Sensor Specifications
• Section 5—Coordination
  • Figure 15: Coordination of Multiple Levels of Ground-Fault Protection
  • Implementing Coordination
    • • the operating-current settings, and
    • • In terms of the current, the setting for the upstream device must be at least double that of th...
      • — Upstream IDn ³ 2 x downstream IDn
      • — upstream time delay T ³ downstream total time T
• Section 6—Application of Vigirex ground-fault Relays
  • Introduction to Equipment Ground-fault Protection
  • Installation in Equipment by the End-User
    • • To protect costly equipment,
  • Installation in Equipment by the OEM
    • • To give competitive advantage to finished product, and
  • Distribution Applications in Addition to NEC Requirements at Main Service
    • • To avoid shutting down an entire facility when only one machine or circuit has a ground-fault– ...
  • Alarming / Monitoring Applications
  • Identifying the Right Applications
    • • equipment protection (30 mA up to 30 A), including controls, motors, transformers, and cable;
  • Consequences of an Insulation Fault
    • • a feeder with excessive cable length;
    • • protection level of more than 30 A is required;
  • Introduction to Electrical Systems
  • Applications
  • TN-S Grounding System
    • • the neutral point of the distribution transformer is grounded;
    • • allows tripping on the first fault to ground;
      • Figure 16: TN-S Grounding System
  • Electrical Shock Hazard
  • Vigirex relays are NOT UL Listed to comply with UL standards for people protection.
  • Wiring Diagrams—RH10, RH21, and RH99
  • Wiring for Optimum Continuity of Service (with Shunt Trip)
    • Figure 17: RH10M, RH21M, and RH99M Wiring with MX Shunt Trip
    • Figure 18: RH10P, RH21P, and RH99P Wiring with MX Shunt Trip
  • Wiring for Optimum Safety (with Undervoltage Release)
    • Figure 19: RH10M, RH21M, and RH99M Wiring with MN Undervoltage Release
    • Figure 20: RH10P, RH21P, and RH99P Wiring with MN Undervoltage Release
    • Figure 21: Cabling for Alarm
  • Connection of Test and Remote Reset Functions
    • Cable
    • Contacts
      • Figure 22: Wiring for Test and Reset
  • Connection of RH10, RH21, and RH99 Power Supply
    • Figure 23: Alternative Power Sources
    • References T and Z: there is no galvanic isolation between A1, A2 and the control circuitry. User...
• Section 7—Vigirex Relays and Sensors Installation and Dimensions
  • Possible Installation Positions
    • Figure 24: RH_ _M Format (RH10M, RH21M, and RH99M)
    • Figure 25: RH_ _P Mount Format (RH10P, RH21P, and RH99P)
  • Relay Mounting Possibilities
    • Mounting of Relays RH10M, RH21M, RH99M
      • • on a DIN rail;
        • Figure 26: Mounting Configurations
  • Dimensions–RH10M, RH21M, and RH99M
    • Figure 27: Mounting on a DIN Rail
    • 3.19 [81]
      • Figure 28: Mounting on a Mounting Plate
      • Figure 29: Door Cutout
  • Dimensions—RH10P, RH21P, and RH99P
    • Figure 30: Front-Panel Mount Relays (Cutout Complying with Standard DIN 43700)
  • Connection (Relays and Sensors)
    • Figure 31: RH_ _M Connections
    • Figure 32: RH_ _P Mount Connections
    • 31
      • Table 11: Terminal Capacity
  • Sensor Mounting
    • Figure 33: TA30, PA50, IA80, or MA120 on DIN Rail Using Supplied Accessories
    • Figure 34: TA30, PA50, IA80, MA120, SA 200 GOA, or POA on a Plate or Bracket
    • Figure 35: TA30 and PA50 Clipped on the Back of the Relay
    • Figure 36: IA80, MA120, SA200, and GA300 Tied to Cables
    • Figure 37: Rectangular Sensors Tied to Cables
    • Figure 38: Rectangular Sensors on Bars with Chocks
  • Conductor Installation Guidelines
    • Immunity to Line Overcurrent
      • • place the toroid on a straight section of cable;
    • Cable Layout
      • Figure 39: Cable with Toroid
    • Connection of Toroid Sensors
      • Figure 40: Connecting Toroid Sensors
  • Connection of Rectangular Sensors and Conductor Layout
    • Figure 41: Connecting Rectangular Sensors
  • Connection Between Vigirex Relays and Sensors
    • Table 12: Sensor Wiring
      • Figure 42: Connecting Vigirex Relays and Sensors
      • In Highly Disturbed Environments:
        • • greater distance between the toroid wires and power circuits;
          • Figure 43: Connecting Vigirex Relays and Sensors in Highly Disturbed Environments
• Section 8—Definitions
  • Coordination
  • Direct Contact
  • Double Insulation
    • • basic insulation required for protection against direct contact, and
  • Earth Leakage
  • EMC / EM
  • Earth (Ground)
  • Equipotential Bonding
  • Exposed Conductive Part
  • Fault (Electrical)
  • Fault Voltage
  • Ground Electrode
  • Ground-Fault Current
  • Ground-Fault Protection (GFP)
  • Ground-Leakage Current
  • Grounding Resistance
  • Indirect Contact
  • Insulation Voltage
  • Intentional Leakage Current
  • Isolated System
  • IT
  • Leakage Current
  • Live Conductor
  • National Electrical Code (NEC)
  • Natural Leakage Current
  • People Protection Devices
  • Pickup Current (Residual Operating Current) (IDn)
  • Protective Ground Conductor (PE)
  • RFI
  • RFI Filter
  • RMS
  • Residual Current
  • Residual Current Device (RCD)
  • Residual Operating Current IDn
  • Sensor
  • Service Voltage
  • TN
  • TN-S
  • TT
  • Time Delay
  • Touch Voltage
  • UL 943
  • UL 1053
  • Zero-Sequence Current