GE IS200EPSMG1A Exciter Power Supply Module (EPSM-G1)

Technical Specifications

• Manufacturer: General Electric (GE)
• Model: IS200EPSMG1A
• Series: Mark VI / EX2100 Excitation System
• Input Voltage: 125 VDC (from EPDM)
• Output Voltages: +5 VDC, ±15 VDC, +24 VDC (regulated)
• Auxiliary Outputs: ±24 VDC, +70 VDC
• Power Stage: Two‑stage (buck regulator + push‑pull inverter)
• Isolation: High‑voltage galvanic isolation between input and output
• Operating Temperature: -40°C to +70°C
• Storage Temperature: -55°C to +85°C
• Humidity: 0%–95% RH, non‑condensing
• Vibration: 0.05 g rms, 5–500 Hz
• Shock: 10 g, 20 ms half‑sine
• Dimensions (H×W×D): 275 × 110 × 57 mm
• Weight: ~2.0 kg
• Certifications: CE, UL, EMC (EN 61000‑6‑2, EN 61000‑6‑3)

Key Features

1. Precision Power Conversion
   • Converts 125 VDC to stable +5 VDC, ±15 VDC, and +24 VDC via a buck regulator (50 VDC intermediate) and push‑pull inverter.
   • Delivers clean, noise‑suppressed power for high‑accuracy control logic and analog circuits.
2. Redundant & Reliable Operation
   • Three independent EPSM‑G1 units (M1, M2, C) provide redundant power to the EX2100 controller, eliminating single points of failure.
   • Built‑in overvoltage, overcurrent, and short‑circuit protection safeguards the module and downstream devices.
3. High‑Voltage Isolation & Noise Immunity
   • The push‑pull inverter’s transformer provides galvanic isolation, protecting the control system from high‑voltage transients and ground loops.
   • EMI/RFI filtering ensures stable performance in electrically noisy industrial environments.
4. LED Status Indication
   • Front‑panel LEDs display power‑good status, fault conditions, and activity for quick on‑site diagnostics.
5. Rugged Industrial Design
   • Compact, rack‑mountable form factor for easy integration into EX2100 enclosures.
   • Wide temperature/humidity tolerance and vibration resistance for 24/7 operation in harsh power‑generation environments.

Application Scenarios

• Power Generation Plants
  • Thermal/Fossil Power: Supplies power to EX2100 excitation systems for synchronous generators, ensuring stable rotor‑field control and grid synchronization.
  • Hydroelectric Power: Powers excitation controls for water‑turbine generators, supporting reliable load regulation and fault ride‑through.
  • Nuclear Power: Provides redundant, isolated power for critical turbine excitation and safety‑related control circuits.
• Oil & Gas Industry
  • Combined‑Cycle Plants: Integrates with Mark VI turbine controls to power gas/steam turbine excitation systems, ensuring efficient, coordinated power generation.
  • Offshore Platforms: Delivers stable power for generator excitation in harsh, vibration‑prone environments.
• Industrial Cogeneration
  • Powers EX2100 excitation systems for on‑site generators in refineries, chemical plants, and manufacturing facilities, supporting continuous, reliable power supply.