ABB

1.Main Functions

1. Multi‑channel field signal conditioning & acquisition Receives and conditions analog and binary field signals from generator side: generator voltage transformer signals, current transformer signals, excitation current feedback, breaker status, auxiliary contact status. Converts raw field signals into standard internal signals for the main AVR regulator CPU.
2. Excitation system hardware protection logic processing Implements hardware‑level protective functions independent of software logic: over‑excitation protection, under‑excitation monitoring, over‑voltage transient suppression, rotor over‑current hardware interlock. Triggers block‑excitation or trip command when dangerous electrical conditions occur, improving system safety beyond software protection.More products: www.plcva.com

ABB UB C717 BE101 Control Board, Part‑No: 3BHE021887R0101

1. Backplane bus data exchange Communicates with UNITROL main CPU board via internal rack backplane bus. Transmits sampled field measurement data upwards; receives AVR control commands downwards and distributes to power driver subunits. Realizes high‑speed deterministic data interaction within excitation cabinet.
2. Binary input / output interlock handling Processes external interlock signals: generator breaker feedback, remote enable/disable command, emergency trip signal. Outputs hardware relay signals for excitation fault alarm, trip indication to DCS and local annunciator panel.
3. On‑board status diagnosis & fault indication Multiple LED status indicators for signal channel status, power supply health and fault events. Captures hardware fault logs for on‑site troubleshooting, helps maintenance personnel locate signal‑circuit failure quickly.
4. Transient surge and EMI suppression On‑board surge‑absorbing and filtering circuits. Suppresses high‑voltage transients and electromagnetic interference coming from generator field circuit, protects the core CPU module from damage in heavy‑duty power‑plant environment.

Important note: This board is a peripheral interface sub‑board. It cannot work standalone; it must cooperate with UNITROL main AVR CPU board, power unit and thyristor rectifier bridge to build a complete generator excitation control system.

ABB UB C717 BE101 Control Board, Part‑No: 3BHE021887R0101

2. Applications & Usage

Core applicable system

Exclusive supporting hardware for ABB UNITROL series synchronous generator excitation systems for power‑generation units.

ABB UB C717 BE101 Control Board, Part‑No: 3BHE021887R0101

Typical application scenarios

1. Thermal power plant generator excitation cabinet: Signal acquisition, hardware protection and interlock interface for turbo‑generator excitation regulators.
2. Hydropower station generator sets: Control cabinet spare part for hydro‑generator UNITROL excitation equipment.
3. Captive power plant / industrial self‑generation station: Auxiliary control board for large synchronous generator voltage regulation and reactive‑power control.
4. Retrofit and spare‑part replacement: Maintenance, repair and component renewal for existing in‑service UNITROL excitation systems.
5. Marine large synchronous generator excitation control for power vessels.

Understand the lowest price, please contact via email: plcvarious@foxmail.com

More products: www.plcva.com

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