Technical Specifications and Board Design
This excitation board provides precise field current regulation for GE Mark V generators. The GE DS200UDSAG1A DS200UDSAG1AAA controls the generator rotor excitation with high accuracy. You can install this board into any standard Mark V rack slot position. Its robust power stage handles demanding continuous field current requirements reliably. The board weighs approximately 0.68 kilograms. Its dimensions measure 28 cm in height, 18 cm in width, and 2.5 cm in depth.
| Parameter | Specification |
|---|---|
| Brand | GE Energy / General Electric |
| Model | DS200UDSAG1A DS200UDSAG1AAA |
| Category | Excitation Board / Generator Field Regulator Card |
| Weight | 0.68 kg |
| Height | 28 cm |
| Length | 18 cm |
| Thickness | 2.5 cm |
| Output Voltage Range | 0-250V DC |
| Output Current Range | 0-12 Amps continuous |
| Output Current Peak | 20 Amps for 10 seconds |
| Input Supply | 400-480V AC (3-phase) |
| Control Inputs | 4 analog (0-10V DC or 4-20 mA) |
| Status Outputs | 4 discrete (24V DC, 0.25A) |
| Field Flash Output | 1 channel (24V DC, 1.5A) |
| Regulation Accuracy | ±0.1% of rated output |
| Response Time | 15 milliseconds typical |
| Isolation Voltage | 3500V DC between power and logic |
| Energy Storage | DC bus capacitors (discharge in 25 seconds) |
| Component Count | Single PCB with power semiconductors, drivers, and control logic |
Field Regulation and Control Features
The board maintains generator terminal voltage within precise operating tolerances. It uses a PID control loop for stable and responsive field regulation. The GE DS200UDSAG1A DS200UDSAG1AAA accepts voltage regulator commands from the main controller. It also supports manual field control during emergency generator operations. The board includes a field flashing circuit for initial generator voltage build-up. This circuit applies a momentary voltage to the rotor field windings. A green LED indicates proper field regulation and control status.
Protection and Monitoring Capabilities
The board continuously monitors field current and voltage for overexcitation conditions. It detects field ground faults and open circuits immediately upon occurrence. The GE DS200UDSAG1A DS200UDSAG1AAA initiates a field de-excitation within 4 milliseconds of a fault. It reports all diagnostic codes back to the turbine controller via the backplane. The board includes a de-excitation contactor driver for emergency generator shutdowns. A red LED illuminates when any fault condition triggers the protection circuit. The board also monitors heatsink temperature for thermal overload protection.
Installation and Operational Guidelines
You must insert this board into a dedicated high-power slot in the Mark V rack. The backplane supplies 5V and 24V DC control power automatically. The GE DS200UDSAG1A DS200UDSAG1AAA requires external 3-phase AC input for the power section. You must wait 25 seconds after power-off before servicing the board. This waiting period allows the DC bus capacitors to discharge safely. You should verify all field wiring uses proper insulation for 250V DC. The board requires no external battery for normal excitation control operation.
Details
| Weight | 0.45 kg |
|---|---|
| Dimensions | 170 × 145 × 65 mm |
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