IS200ERSCG2A | GE Mark VIe EX2100 Exciter Regulator Static Converter Board

GE IS200ERSCG2A EX2100 Exciter Regulator Static Converter Board — PWM DC Output, Field Discharge

The IS200ERSCG2A is an Exciter Regulator Static Converter Board for GE's EX2100 excitation control system, typically used in conjunction with the Mark VI turbine control platform. It generates a pulse-width-modulated (PWM) DC output current for synchronous generator field excitation and includes a field discharge function for safe de-energization. The board features six integrated IGBTs for power switching and can operate in simplex or redundant modes.

Key Specifications

• Manufacturer: General Electric / GE Energy
• Series: EX2100 Excitation Control / Speedtronic
• Type: Exciter Regulator Static Converter Board
• Function: PWM DC output current generation; field discharge control
• AC Input Voltage: 3-phase, 480 VAC or 600 VAC
• DC Output Current: Up to 100 A
• Output Current Accuracy: ±0.5%
• Field Discharge Current: Up to 200 A
• Power Devices: Six integrated IGBTs
• DC-Link Bypass Relay: Built-in relay for charging resistor bypass
• Communication: RS-485 network interface; Ethernet Modbus for DCS integration
• Operating Modes: Simplex or redundant
• Compatible Boards: ERDD, ERRR, ERBP, ERRB, ERIO (depending on configuration)
• Dimensions: ~305 mm × 254 mm × 89 mm (12" × 10" × 3.5")
• Weight: ~5.4 kg (11.9 lb)
• Status: Mostly obsolete; limited availability

Architecture & Connectivity

• PWM Control: Receives PWM signals from IS200EROCH1A (Exciter Regulator Output Control)
• Field Discharge: Controlled by regulator via dedicated IGBT
• Redundant Backplane: Connects to IS200ERRBG1A for redundant operation
• Controller Interface: IS200DSPXH1D for system control and monitoring
• Communication: Serial or Ethernet Modbus to standalone DCS

Installation Guide

1. Power off the EX2100 system and verify lockout/tagout procedures.
2. Install the IS200ERSCG2A into the designated EX2100 chassis slot.
3. Connect 3-phase 480/600 VAC input power to the board terminals.
4. Wire DC output to the generator field windings via proper cabling.
5. Connect RS-485 or Ethernet communication links to the control network.
6. If using redundant mode, connect to IS200ERRBG1A backplane and configure ERDD/ERRR/ERIO boards.
7. Verify IGBT thermal management and cooling airflow.
8. Power on and verify PWM output waveform and field discharge function via diagnostics.

FAQ

Q: Is IS200ERSCG2A part of Mark VI or EX2100?
A: It is part of the EX2100 excitation control system, which typically works with Mark VI turbine controls. It is not a Mark VI core board.

Q: What is the difference between IS200ERSCG2A and IS200ERSC?
A: IS200ERSCG2A is the second version (G2) of the IS200ERSC static converter board, with improved IGBT integration and control features.

Q: Can it operate in redundant mode?
A: Yes. It supports both simplex and redundant configurations. In redundant mode, connect with ERDD, ERRR, ERBP, ERRB, or ERIO boards.

Q: What does the DC-link bypass relay do?
A: It bypasses the charging resistor after startup to reduce power dissipation and improve efficiency.

Q: Is this board still in production?
A: No. IS200ERSCG2A is mostly obsolete and hard to find. Verify availability with your supplier before ordering.

Q: What protection is built-in?
A: Overcurrent, overvoltage, thermal shutdown, and field discharge protection via integrated IGBTs.

Selection Tips

• EX2100 excitation system, 100A PWM output: IS200ERSCG2A
• Ensure compatible controller: IS200DSPXH1D + IS200EROCH1A
• Redundant operation: Order IS200ERRBG1A backplane + ERDD/ERRR/ERIO boards
• Verify input voltage: 480 VAC or 600 VAC 3-phase
• Check availability: Obsolete part — confirm stock before committing