The GE IS200EPSMG2AED is an Exciter Power Supply Module (EPSM Group 2) used in the GE EX2100 excitation system, which is commonly integrated with Mark VI turbine control systems.
It is responsible for converting high-voltage DC link power into multiple regulated, isolated output voltages used by excitation controllers, regulator boards, and protection circuits. Compared to Group 1 EPSM modules, this is a more advanced power distribution revision with additional regulation and a daughterboard (EPSD).
Technical Specifications
The IS200EPSMG2AED is a multi-output industrial power module designed for turbine excitation systems.
| Parameter | Specification |
|---|---|
| Module Type | Exciter Power Supply / Power Distribution Module |
| Series | GE EX2100 / Mark VI compatible |
| Function | DC power conversion and regulated supply distribution |
| Input Voltage | ~125 VDC DC link supply |
| Output Voltages | +5 VDC, ±15 VDC, +24 VDC, +70 VDC (contact wetting supply) |
| Architecture | Buck regulator + push-pull inverter stage |
| Submodule | Includes EPSD daughterboard |
| Isolation | High-voltage transformer isolation |
| Protection | Multiple fuses + fault protection circuitry |
| Diagnostics | LED status indicators + test points |
| Redundancy | Supports dual-module redundant configurations |
| Mounting | EPBP / ERBP backplane rack installation |
| Operating Temp | Industrial range (-30°C to +65°C typical) |
Physical Characteristics
| Item | Value |
|---|---|
| Approx. Dimensions | ~263 × 58 × 28 mm |
| Weight | ~2–4 kg (varies by revision/source) |
System Role
The IS200EPSMG2AED is a core power infrastructure module in excitation systems:
- Converts DC link voltage into regulated control rails
- Supplies power to EX2100 controllers (M1, M2, C)
- Provides isolated 70 VDC contact-wetting supply
- Feeds protection, regulator, and interface boards
- Maintains excitation system stability and generator field control
It is not a control processor, but a critical power distribution and regulation module.
Key Functional Improvements (Group 2 vs Group 1)
Compared with EPSMG1 versions, the G2AED typically includes:
- Additional EPSD daughterboard for improved regulation
- Enhanced diagnostic test points
- More refined voltage conditioning architecture
- Improved protection (additional fuse stage)
- Better integration with EX2100 regulator control systems
