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GE SSF2G5X2U000000

Product Name:​ GE Single-Channel Solid-State DC Driver Module (Excitation System)
Introduction:​ A forced-air-cooled power converter that transforms a 4–20 mA control signal from an AVR into high-current DC for generator rotor excitation.
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Detailed content

Technical Specifications:
  • Output:​ 0–500 V DC adjustable, 1000–6000 A DC (model-dependent)
  • Power Device:​ GTO thyristor stack
  • Control Input:​ 4–20 mA DC
  • Method:​ Phase-angle firing
  • Response:​ < 10 ms
  • Cooling:​ Forced fan, bottom-to-top airflow
  • Protection:​ Overcurrent, overvoltage, overtemperature, commutation fail, DC short
  • Enclosure:​ IP20 steel cabinet
Functional Features:​ Constant-V / constant-I / constant-Q / constant-PF modes, soft-start, hot-swappable drawers.
Working Principle:​ AVR error signal → firing board → GTO gate pulses → DC output follows command linearly.
Materials:​ Aluminum extrusion heatsink, silver-plated copper busbars, GTO modules, FR-4 driver PCB.
Installation:​ Mount in excitation cubicle; maintain 150 mm top/bottom clearance; use copper busbar for DC output; separate signal wire (twisted shielded) from power bus.
Precautions:​ Never de-energize DC side under load; replace GTO per accumulated conduction hours; inspect fan/filter quarterly.

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