ABB UFC911B104 3BHE037864R0104 Fiber Optic IGCT GDU Gate Driver Unit For GE EX2100 Excitation & MV Medium Voltage Converters
ABB UFC911B104 + 3BHE037864R0104 Fiber Optic IGCT GDU Gate Driver Unit For GE EX2100 Excitation & MV Medium Voltage Converters
Manufacturer: ABB Hitachi Energy Control Electronics
Dual Part Number: Core Driver PCB:UFC911B104 / Complete Integrated GDU Assembly:3BHE037864R0104
Matching Power Device: 2600V / 4500V StakPak IGCT & RC-IGCT Series (5SHY3545L0010,5SHX2645L0002,5SHX0845F0001)
Compatible Master Controller: GE Mark VI IS215UCVEH2AF, DS200SDCCG5AHD Excitation Control Board
Applicable System: All capacity GE EX2100 Static Excitation Cabinet, ABB ACS6000 Medium Voltage Drives, Wind Farm VSC Grid-Tied Converters
Type: Fiber Optic Isolated Self-Powered IGCT Gate Drive Unit With Multi-Channel Hardware Fault Detection & Feedback
Core Function: Optical PWM pulse reception & amplification, full galvanic isolation between control & power circuit, real-time multi-parameter IGCT fault monitoring, instant gate pulse block, bidirectional fiber fault signal feedback, self-power supply from DC bus
1. Product Overview
UFC911B104 is the core signal processing PCB of ABB medium voltage IGCT fiber gate driver, integrated into full assembly 3BHE037864R0104 as a complete GDU unit. It receives low-power optical PWM firing pulses from the excitation master controller, amplifies to high-current gate signals to drive StakPak IGCT devices, and continuously monitors critical operating parameters of the power semiconductor.
10kV full fiber galvanic isolation completely separates low-voltage control system and 4.5kV high-power circuit, eliminating high-voltage backfeed damage to main control boards. Built-in self-power supply circuit draws energy directly from converter DC bus without external auxiliary power source, simplifying cabinet wiring layout.
Multi-channel hardware fault detection logic triggers microsecond-level gate pulse blocking upon overcurrent, over-temperature, fiber loss, gate supply loss or DC overvoltage; fault status is transmitted back to main controller via reverse fiber for accurate fault location. Widely used in full range GE EX2100 generator static excitation converters, ABB ACS6000 medium voltage four-quadrant drives and wind farm grid-connected VSC converters. ABB discontinued new original production, refurbished and surplus GDU assemblies are standard spare parts for power plant maintenance and retrofit.
