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GE IS210MVRCH1A

Product Name​
GE IS210MVRCH1A MVRC High-Voltage Relay Control and Excitation Regulator Assembly
Product Introduction​
The GE IS210MVRCH1A is a Process Wiring Assembly (PWA) combining the IS200MVRC baseboard and IS200HSLA high-speed serial link board. It functions inside Mark VI / Mark VIe C-core racks as the excitation voltage regulator and high-voltage relay controller for EX2100 static exciter systems.
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Detailed content

Technical Specifications​
  • Input Signals: 3-phase VT 120 VAC, CT 5 A, DC field voltage 0–250 V
  • Output Drive: ±10 VDC / ±200 mA to thyristor firing stage
  • Regulation Accuracy: ±0.05 % of setpoint
  • Step Response: < 20 ms to 90 % of change
  • Control Modes: AVR, FCR, PSS (IEEE 2A/2B stabilizer)
  • Communication: HSLA high-speed serial, Ethernet Modbus/TCP, Profibus-DP option
  • Redundancy: hot standby switchover < 50 ms
  • Supply: 24 VDC ±10 % (15 W)
  • Operating Temperature: -30 °C to +65 °C
  • MTBF: 250,000 hours per IEC 61709
Functional Features​
  • Maintains generator terminal voltage and reactive power sharing
  • Drives SCR firing pulses for field current regulation
  • Manages turbine-start high-voltage contactor logic via relay outputs
  • Continuous self-diagnostics on thyristor health and field insulation
  • Front LEDs: green run, yellow standby, red fault
Material Composition​
  • Baseboard and HSLA daughterboard: FR-4 with IPC-CC-830B conformal coat
  • Aluminum mounting brackets (4 per assembly)
  • Gold-finger backplane edge connectors
  • Surface-mount DSP and FPGA devices
Structural Characteristics​
  • Dual-board stack fixed by four mounting brackets
  • Ports: JC, JAA, JBB, JCC, JDD, JAR, JAS, JAT, optional JHH/JII
  • Occupies one C-core slot in Mark VIe VME rack
  • Weight under 5 lb
Working Principle​
Generator VT/CT data and operator setpoints enter the MVRC baseboard, are exchanged with the controller over HSLA at millisecond scan, processed by PID + PSS algorithm, converted to ±10 V firing command, and forwarded to the EGDM gate-drive stage; high-voltage auxiliary relays for breaker control are switched through on-board contacts.
Application Scenarios​
  • GE EX2100 and EX2100e exciter cabinets
  • Frame 7FA/9FB combined-cycle generator excitation
  • Steam turbine generator AVR replacement projects
Installation Requirements​
  • Insert into C-core vacant location 2 with both brackets seated
  • Fiber HSLA cables must click into transceiver seats
  • 24 VDC supply from isolated control power, not from thyristor DC bus
Usage Precautions​
  • Treat as ESD-sensitive; no bare-hand contact with gold fingers
  • Verify field polarity before first AVR close-loop test
  • Do not run with HSLA fiber disconnected—causes exciter watchdog trip

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