Description
⚡ Product Overview
The GE IS200EGPAG1A is an Exciter Gate Pulse Amplifier (EGPA) board used in GE EX2100 excitation control systems. The board provides the interface between the excitation control circuitry and the power bridge, receiving six gate commands from the ESEL and generating firing signals for up to six SCRs.
The EGPA also handles bridge-related feedback and monitoring functions, including current conduction feedback, bridge airflow, temperature monitoring, gate power status, cooling fan status, and alarm/fault indications. One EGPA board is used per Power Conversion Module (PCM).
🔧 System Integration
The IS200EGPAG1A is installed in the power conversion section of an EX2100 excitation system. It works with the ESEL control board, EPDM power distribution circuitry, SCR bridge, and associated feedback/protection components.
The board uses a nominal 125 VDC source from the EPDM to supply an onboard DC/DC converter for SCR gate firing. GE documentation identifies the EGPA for systems using thyristors up to 77 mm; larger 100 mm thyristor applications use the EHPA variant instead.
📋 Product Specifications
| Parameter | Specification |
|---|---|
| Brand | General Electric (GE) |
| Model | IS200EGPAG1A |
| Series | EX2100 Excitation Control |
| Product Name | Exciter Gate Pulse Amplifier Board |
| Product Type | Printed Circuit Board Assembly |
| Board Function | SCR Gate Pulse Amplification / Power Bridge Interface |
| Gate Channels | 6 gate commands / up to 6 SCRs |
| Nominal Input Power | 125 VDC from EPDM* |
| Controller Interface | ESEL |
| Installation | Power Conversion Module / Power Conversion Cabinet |
| Associated System | GE EX2100 Excitation Control |
| Manual Reference | GEI-100461 / GEH-6632 |
| Condition | New – Open Box* |
*Electrical and inventory details should be confirmed against the actual board nameplate and supplied unit.
🧩 Key Features
- Six SCR gate command channels
- Gate firing control for the excitation power bridge
- Interface with ESEL control circuitry
- Current conduction feedback
- Bridge airflow monitoring
- Bridge temperature monitoring
- Gate power supply status indication
- Cooling fan status indication
- Alarm and fault indication
- Designed for one EGPA per PCM
- Used in GE EX2100 static excitation systems
❓ Common Questions & Answers
Q: What does the IS200EGPAG1A do?
A: It interfaces the EX2100 control system with the power bridge and generates firing pulses for up to six SCRs.
Q: Which board provides the gate commands?
A: The EGPA receives six gate commands from the ESEL board.
Q: What power source is associated with the EGPA?
A: The EX2100 documentation specifies a nominal 125 VDC source from the EPDM, which feeds an onboard DC/DC converter used for SCR gating.
Q: How many EGPA boards are used in a Power Conversion Module?
A: GE documentation specifies one gate pulse amplifier board per PCM.
Q: Is IS200EGPAG1A interchangeable with IS200EGPAG1B?
A: Do not assume direct interchangeability. Compare the complete board part number, revision, system configuration, connectors, and existing application documentation before replacement.
⭐ 10 Related GE EX2100 Models
- GE IS200EACFG1A
- GE IS200EACFG1B
- GE IS200ECTBG1A
- GE IS200EDCFG1B
- GE IS200EDEXG1B
- GE IS200EGDMH1A
- GE IS200EISBH1A
- GE IS200EMCSG1A
- GE IS200EMIOH1A
- GE IS200EPSMG1A
