ABB XVC772A102 3BHE032285R0102 DSP Pulse Control Board

Manufacturer: ABB Hitachi Energy Power Electronics

Dual Part Number: Core DSP PCB:XVC772A102 / Complete Integrated Assembly:3BHE032285R0102

Matching Power Components: 5STP Series Thyristor, 5SHY/5SHX IGCT, UFC911B104 GDU, 5SDD Freewheeling Diode Stacks

Applicable Systems: ABB UNITROL5000/6800 Static Excitation System, ACS2000 6kV/10kV Medium Voltage Four-Quadrant Drives

Type: DSP-Based Analog Sampling & Fiber Optic Pulse Trigger Main Control Board With Multi-Channel Hardware Protection & Communication

Core Function: Generator AVR voltage closed-loop regulation, PSS power system stabilizer calculation, firing angle phase computation, bidirectional fiber PWM pulse transmission, power device fault signal acquisition, multi-protocol data communication, hardware fast interlock protection

1. Product Overview

XVC772A102 is the core DSP signal processing PCB of ABB medium voltage converter & static excitation control system, fully integrated into complete rack assembly 3BHE032285R0102. It samples generator PT voltage and CT current analog signals, executes full AVR, PSS, UEL control algorithms, calculates accurate firing phase angles, and outputs isolated fiber optical trigger pulses to thyristor and IGCT power stacks. 10kV full galvanic fiber isolation separates low-voltage control circuit and 4.5kV high-power circuit to eliminate high-voltage backfeed damage. Built-in multi-parameter hardware fault detection logic triggers microsecond pulse block upon overvoltage, overcurrent, over-temperature, fiber loss, sync signal loss or excitation limit violation. Fault status is transmitted back to upper DCS/HMI via reverse fiber or fieldbus. Widely used in thermal/hydro/wind generator UNITROL excitation cabinets and ACS2000 medium voltage four-quadrant mill & mine drives. Adopts 3U modular rack design with hot-swap support, varnish coated PCB for dust/moisture resistance. ABB stopped new original production, refurbished surplus boards are standard spare parts for power plant maintenance and capacity retrofit.