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The GE IS200ERGTH1A serves as a dedicated ground detector for exciter regulator systems. This board belongs to the Mark VIe series from General Electric. Its upgraded version GE IS200ERGTH1AAA offers identical mechanical compatibility with refined component tolerances.
Technical Specifications
Below are the verified parameters for this ground detector board：
| Parameter | GE IS200ERGTH1A | GE IS200ERGTH1AAA |
|---|---|---|
| Function | Exciter Regulator Ground Detector | Exciter Regulator Ground Detector |
| Detection Channels | 8 isolated inputs | 8 isolated inputs |
| Voltage Range | 24–48V DC nominal | 24–48V DC nominal |
| Sensitivity | 10 kΩ typical | 10 kΩ typical |
| Response Time | <20 ms | <18 ms |
| Interface | 20-pin ribbon cable | 20-pin ribbon cable |
| Energy Storage | No internal battery | No internal battery |
| Component Count | 42 discrete components | 38 surface-mount components |
| Dimensions（L x W） | 16.5 cm x 10.2 cm | 16.5 cm x 10.2 cm |
| Weight | 0.26 kg（0.57 lbs） | 0.25 kg（0.55 lbs） |
| Temperature Range | -40°C to +85°C | -40°C to +85°C |
Reliable Ground Detection for Exciter Systems
The GE IS200ERGTH1A monitors eight independent field ground paths simultaneously. Each channel uses a high-impedance voltage divider for accurate leakage detection. Therefore, this board prevents unexpected exciter shutdowns in gas or steam turbines. The GE IS200ERGTH1AAA improves upon its predecessor with better thermal stability.
Simple Integration with Mark VIe
You connect the GE IS200ERGTH1A directly to the EX2100e exciter controller. A standard 20-pin ribbon cable carries all detection signals. Consequently, the system reports ground faults within 20 milliseconds. This fast response protects your generator field windings from damage.
Maintenance and Compatibility
Neither the GE IS200ERGTH1A nor the GE IS200ERGTH1AAA requires battery replacement. They draw operating power directly from the exciter regulator backplane. Both versions share identical mounting holes and connector positions. Hence, you can replace one with the other without any hardware modification.