ABB UFC921A1101 3BHE024855R1101 Power Interface Board

ABB UFC921A1101 3BHE024855R1101 Power Interface Board

I. Product Description
Internal Function Model: UFC921A1101
ABB Official Complete Order Part Number: 3BHE024855R1101
Ownership System: UNITROL 6000 Synchronous Generator Static Excitation System
Mandatory Companion Controller: 3BHE024577R1101 (PPC907BE1101 Excitation CPU Board), Both Must Be Used as a Set

 Core Positioning
Excitation System Main Control CPU and Signal Transfer Collection Drive Board, High and Low Voltage Isolation Hub:
Receive CPU’s optical fiber trigger instructions, drive power circuit to output excitation current
Collect excitation transformer CT/PT, power unit temperature, radiator, fan, cabinet door lock interlock signals
Hardware Integrated Overcurrent, Overtemperature, Short Circuit Rapid Lockout Protection to Prevent Power Devices from Breakdown
Multi-channel ST Optical Fiber Bidirectional Communication, Isolating Low Voltage Control Side from High Voltage Power Side, Resisting Strong Electromagnetic Interference in Power Plants

Core Hardware Functions
Multi-channel Optical Fiber Transceiver Interface
Multiple Industrial ST Optical Fiber Channels, Issuing Thyristor/IGCT Trigger Pulse, Transmitting Power Unit Fault, Conducting Status; Real-time Self-check for Fiber Breakage, Optical Power Attenuation and Uploading Alarms.
High Precision Analog Quantity Collection Circuit
Collect terminal voltage PT, excitation current CT, providing measurement data source for AVR automatic voltage regulation, overexcitation/underexcitation/V/Hz Limitation.
DI/DO Interlock Circuit
Connect cooling fan, radiator temperature control, cabinet door switch, external trip contacts; Output Fault, Excitation Trip, Comprehensive Alarm Relay Dry Contacts.
Backplane High-Speed Internal Bus
Real-time interact with PPC907BE Main Control Board to measure data, fault recording, protection action signals.
Hardware Ultra-Speed Protection
Independent Hardware Protection Logic, No CPU Calculation Required, Fault Microsecond-level Trigger Pulse, Ensuring Unit Safety.

 Electrical and Environmental Parameters
Power Supply: Rack Backplane DC24V ±10%
Overall Power Consumption: ≤5W
Operating Temperature: -20℃ ~ +70℃ (Power Plant Excitation Cabinet Wide Temperature Design)
Storage Temperature: -40℃ ~ +85℃
Protection Grade: IP20 (Slot Installation Inside the Cabinet)
Installation Method: Standard Rack Slot, Supports Hot Swap without Shutdown
Companion Fiber: Multi-mode Industrial ST Optical Fiber (3BHL000517P0002 Fiber Board Compatible Link)

 Version Differentiation (Cannot Be Directly Interchanged) Table
Full part number Internal model Version difference
3BHE024855R0101 UFC921A101 Basic standard version, small and medium-sized hydro turbines / diesel generators
3BHE024855R1101 UFC921A1101 Enhanced customized version, large-capacity steam turbine generator, multiple parallel power units, optimized excitation loss protection, PSS stability algorithm

Complete set of excitation system matching list
Excitation main control CPU board: 3BHE024577R1101 PPC907BE1101
Power signal interface board: 3BHE024855R1101 UFC921A1101 (this model)
Fiber optic valve-controlled signal board: 3BHL000517P0002
IGCT / thyristor power rectification unit
Excitation transformer, synchronous device, 800xA upper monitoring system
Seven. Typical application scenarios
Large thermal power steam turbine generator excitation cabinet UNITROL 6000
Excitation control system for large and medium-sized hydropower water turbines
Synchronous units for gas turbines, biomass / steel plant self-owned power stations
Large power synchronous motor excitation devices for nuclear power and chemical self-owned power plants