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Module Overview
This field exciter module controls the rotor field current for Mark V generators. You can install GE DS2020FEANRP050A directly into Mark V excitation control racks. The unit provides regulated DC current to the generator rotor windings. It maintains proper voltage output under varying load conditions.
Technical Specifications
| Parameter | Value |
|---|---|
| Dimensions (W x H x D) | 300 mm x 150 mm x 50 mm |
| Weight | 1.85 kg |
| Output current rating | 50A DC continuous |
| Output voltage range | 0 to 500V DC |
| Input supply | 500V AC (3-phase) |
| Control method | Phase-controlled SCR bridge |
| Regulation mode | Automatic voltage regulator (AVR) |
| Response time | < 10 ms for step change |
| Ripple current | < 5% peak-to-peak |
| Protection | Overcurrent and overvoltage |
| Status indicators | 8 LEDs (power, firing pulses, fault) |
| Total onboard components | 342 discrete parts |
| Energy storage type | Large electrolytic capacitors |
| Energy storage rating | 4700 µF at 600V DC |
| Operating temperature | -10°C to +50°C |
Board Layout and Components
The PCB contains six SCR devices arranged in a three-phase bridge configuration. Large electrolytic capacitors store 4700 µF of energy on the DC bus. Moreover, 342 discrete components include gate drive circuits and snubber networks. A massive heatsink dissipates heat from the SCRs during operation. Consequently, the module delivers clean DC current with low ripple.
Installation Process
You can mount GE DS2020FEANRP050A into Mark V excitation cabinet racks. The AC input terminals connect to the three-phase exciter supply. Furthermore, the DC output terminals connect directly to generator rotor slip rings. Control signals from the AVR adjust the SCR firing angle automatically.
Performance Advantages
This module responds to voltage regulation requests within 10 milliseconds. The 50A output capacity suits medium-sized turbine generators. Therefore, the exciter maintains stable generator voltage despite load changes. The phase-controlled SCR design also provides efficient power conversion.
Safety and Compliance
GE DS2020FEANRP050A meets CE and UL standards. The DC bus capacitors require 120 seconds to discharge below 50V. Hence, technicians must wait two minutes after power-down before servicing internal components.