MeloAuto-Trusted PLC & DCS Parts Supplier
Module Overview
This field exciter module provides universal control for generator rotor excitation. You can install GE DS2020UCOCN4G1A directly into Mark V excitation control racks. The unit implements automatic voltage regulation and power factor control. It communicates with the main turbine controller via a dedicated serial link.
Technical Specifications
| Parameter | Value |
|---|---|
| Dimensions (W x H x D) | 300 mm x 150 mm x 50 mm |
| Weight | 1.62 kg |
| Control modes | AVR, power factor, reactive power |
| Voltage regulation accuracy | ±0.5% of setpoint |
| Response time | < 20 ms for voltage step |
| Communication | RS-485 (Modbus RTU) |
| Analog inputs | 3 voltage + 3 current (4-20 mA) |
| Analog outputs | 2 control signals (4-20 mA) |
| Digital inputs | 6 (trip, enable, mode select) |
| Digital outputs | 4 (status and alarm) |
| Protection functions | Overexcitation, underexcitation, V/Hz |
| Status indicators | 6 LEDs (control mode, trip, comm) |
| Total onboard components | 386 discrete parts |
| Energy storage type | Tantalum and ceramic capacitors |
| Energy storage rating | 680 µF at 35V DC |
| Operating temperature | -10°C to +50°C |
Board Layout and Components
The PCB houses a 32-bit processor for real-time control calculations. Six analog input circuits condition voltage and current transformer signals. Moreover, 386 discrete components include protection relays and communication transceivers. Tantalum capacitors provide stable power for the processor and analog circuits. Consequently, the module delivers precise voltage regulation across varying load conditions.
Installation Process
You can mount GE DS2020UCOCN4G1A into Mark V excitation cabinet racks. The backplane connector supplies power and interfaces to the firing card. Furthermore, front panel ports accept CT, PT, and communication wiring. Configuration software sets control modes and protection parameters easily.
Performance Advantages
This module regulates generator voltage within ±0.5% of setpoint typically. The 20 ms response time handles grid disturbances effectively. Therefore, the generator maintains stable output despite sudden load changes. The multiple control modes also allow seamless switching between AVR and power factor regulation.
Safety and Compliance
GE DS2020UCOCN4G1A meets CE and RoHS standards. The board discharges stored energy below 3V within eight seconds. Hence, technicians face minimal electrical risk during installation or replacement.