ABB T60407-B4803X010 3BHB004719R0001 Gate Drive Pulse Transformer For UNITROL Excitation & ACS6000 MV Drives
ABB T60407-B4803X010 3BHB004719R0001 Gate Drive Pulse Transformer For UNITROL Excitation & ACS6000 MV Drives
Manufacturer: ABB Hitachi Energy Power Electronics
Dual PN: Pulse Transformer Core: T60407-B4803X010 / Full Assembly: 3BHB004719R0001
Matching Hardware: XVC772A102 Excitation Main Board, UFC911B104 IGCT/SCR Gate Driver, 5SDD/5STP/5SHY StakPak Power Stacks, LT2005-S/SP19 Current Transducer, AI810 I/O Module, CI858 Communication Card
Applicable Systems: UNITROL5000/6000 Static Generator Excitation, ACS6000 6kV Medium Voltage Multi-Drive Converters
Type: Toroidal Epoxy Encapsulated Isolation Pulse Transformer, 4 Independent Secondary Gate Drive Windings, 6kV Galvanic Isolation
Core Function: Low voltage control pulse galvanic isolation, SCR/IGCT gate trigger voltage step-up, high-low voltage circuit separation, multi-device synchronous parallel triggering, DSP control board overvoltage protection
1. Product Overview
T60407-B4803X010 (3BHB004719R0001) is dedicated gate drive pulse transformer designed for ABB UNITROL static excitation and ACS6000 medium voltage converter power stage. It isolates low-voltage DSP control pulses from 6kV high-power DC link circuits to prevent high voltage back-feed damage to XVC772A102 main control DSP board.
Toroidal low-leakage magnetic core ensures distortion-free trigger pulse waveform, supporting 0~1kHz AVR modulation frequency. Four independent isolated secondary windings enable synchronous triggering of multiple parallel StakPak SCR/IGCT power stacks for balanced current sharing. Full epoxy encapsulation delivers dust, moisture and vibration resistance for continuous 24/7 power plant operation. Failure mode is open-circuit safe, only disabling corresponding power bridge without generator runaway loss-of-excitation risk. Widely used in thermal/hydro power plant excitation cabinets and metallurgical rolling mill medium voltage drive lines. ABB supplies complete mounted assembly under PN 3BHB004719R0001 as official maintenance spare part.
