Original ABB 500B0M01 power unit module for Unitrol 1000 excitation system, power supply and power drive board for synchronous generator AVR spare part.

Product Overview

500B0M01 (1MRB150023R0002‑01) is power unit module of ABB Unitrol 1000 excitation system, applied to synchronous generator and synchronous motor automatic voltage regulator AVR. It undertakes excitation power drive, power conversion and auxiliary power supply function, receives control signals from main AVR control board, outputs adjustable excitation current to generator rotor winding. It integrates over‑excitation, under‑excitation, V/Hz limit protection circuits, realizes generator voltage stabilization and reactive‑power regulation. Standard Eurocard plug‑in board, conformal‑coated PCB hardware adapts to vibration and electromagnetic interference inside excitation cabinet. Widely used as maintenance spare part for power‑plant turbine generator, hydro‑generator excitation control cabinets.

Key Features

• Dedicated power unit for Unitrol 1000 excitation AVR system, completes excitation power drive and power conversion
• Built‑in over‑excitation limiter, under‑excitation limiter, volts‑per‑hertz protection and field‑current limiting function
• Receives control commands from main control board, outputs adjustable excitation power to generator rotor
• Galvanic isolation between power circuit and control logic circuit to suppress interference
• Front‑panel LED indicators for power status, fault and over‑current alarm
• Standard Eurocard plug‑in structure, installed inside excitation system cabinet

• Industrial‑grade conformal‑coated PCB for long‑term continuous operation in power‑plant environment

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Technical Specifications

• Brand: ABB
• Model: 500B0M01, 1MRB150023R0002‑01
• Module Type: Excitation Power Unit Module
• System Platform: Unitrol 1000 AVR Excitation System
• Application: Synchronous generator / motor excitation control
• Power Supply: Excitation cabinet internal power input
• Protection Functions: OEL, UEL, V/Hz, field current limit
• Operating Temp: 0℃ ~ +55℃
• Storage Temp: ‑40℃ ~ +85℃
• Humidity: 5‑95% non‑condensing

• Installation: Plug‑in inside Unitrol 1000 excitation cabinet

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Compatibility

Compatible with ABB Unitrol 1000 excitation system. After replacement, check power wiring, excitation loop test and protection function verification required.