Description
🔹 Product Description
The GE IS200EHPAG1A, also identified as IS200EHPAG1ADC, is an Exciter Gate Pulse Amplifier Board used in the GE EX2100 excitation control system. The EHPA board provides the interface between the excitation controller and the power bridge. It receives six gate commands from the ESEL control board and generates gate firing pulses for up to six SCRs in the exciter bridge.
The board also provides interfaces for SCR conduction feedback and bridge operating-condition monitoring, including airflow and temperature. GE documentation identifies EHPA as the gate pulse amplifier solution for systems using 100 mm thyristors, while EGPA is used for smaller thyristors. One gate pulse amplifier board is required per PCM.
📋 Product Datasheet
| Parameter | Specification |
|---|---|
| Brand | General Electric (GE) |
| Model | IS200EHPAG1A / IS200EHPAG1ADC |
| Series | EX2100 Excitation Control |
| Product Name | Exciter Gate Pulse Amplifier Board |
| Functional Acronym | EHPA |
| Board Type | Printed Circuit Board Assembly |
| Main Function | SCR Gate Pulse Amplification / Bridge Interface |
| Controlled Devices | Up to 6 SCRs |
| Place of Manufacture | USA |
| Product Status | NSNB – New Surplus / Never Used |
| Original Country | United States |
| Power | System-supplied DC power; verify cabinet configuration before installation |
| Discontinued | Legacy / discontinued Mark VI-era component |
⚙️ Main Functions
• Receives six gate commands from the ESEL control board
• Generates firing pulses for up to six SCRs
• Interfaces the EX2100 controller with the power conversion bridge
• Provides SCR conduction feedback interface
• Supports bridge airflow monitoring
• Supports bridge temperature monitoring
• Designed for 100 mm thyristor-based exciter bridge applications
• Installed in the power conversion cabinet
• One EHPA/EGPA board is required per PCM
❓ Q&A
Q: What is the IS200EHPAG1A used for?
A: It is an Exciter Gate Pulse Amplifier Board used to interface the EX2100 control system with the exciter power bridge and provide gate firing signals to SCRs.
Q: What is the difference between EHPA and EGPA?
A: GE documentation identifies EHPA for exciter systems using 100 mm thyristors, while EGPA is used on systems with 77 mm thyristors or smaller.
Q: How many SCRs can the board control?
A: The EHPA receives six gate commands and controls gate firing for up to six SCRs.
Q: Which controller sends commands to the EHPA?
A: The ESEL board receives the gate-pulse signals from the controller and distributes them to the EGPA or EHPA boards in the power conversion cabinet.
Q: What should be checked before replacement?
A: Confirm the complete IS200EHPAG1A/IS200EHPAG1ADC part number, board revision, connector arrangement, thyristor size, PCM configuration, and the existing EX2100 system documentation.
⭐ Recommended GE Models
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- IS200EACFG1B | EX2100 Exciter AC Feedback Board
- IS200EDCFG1B | EX2100 Exciter DC Feedback Board
- IS200EDEXG1B | EX2100 Exciter De-Excitation Board
- IS200EPDMG1B | EX2100 Exciter Power Distribution Module
- IS200EROCG1A | EX2100 Exciter Regulator Options Board
- IS200EGDMG1A | EX2100 Exciter Field Ground Detector Module
- IS200EXCSG1A | EX2100 Exciter Conduction Sensor Board
- IS200EMCSG1A | EX2100 Exciter Conduction Sensor Board
- IS200EHFCG1A | EX2100 Exciter Fan Controller Board
- IS200EXAMG1A | EX2100 Exciter Attenuator Board
- IS200ESELH1A | EX2100 Exciter Selector Board
- IS200ESELH2A | EX2100 Exciter Selector Board
- IS200ESELH3A | EX2100 Exciter Selector Board
- IS200EBKPG1B | EX2100 Exciter Backplane Board
