The UNITROL1000 with part codes 3BHE014557R0104 and 3BHE006720R0001 is the core main control board of ABB UNITROL1000 series generator excitation AVR system, serving as the central computing unit for synchronous generator automatic voltage regulation. It adopts dual-processor separation architecture, current and field winding feedback signals, and executes high-speed PID voltage regulation, PSS power oscillation damping and full-set excitation protection algorithms.
This single-slot rack-mounted board integrates multi-channel analog sampling, digital I/O expansion, Ethernet and serial communication interfaces, compatible with single/dual redundant excitation cabinet configurations. It supports CMT1000 professional debugging software for parameter configuration and fault waveform recording. ABB's UNITROL1000 series covers generators from 100kVA to 80MVA, and this mainboard is globally supplied as key maintenance spare parts for thermal, hydro and industrial self-owned power plants.
Main Specifications
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Brand: ABB; Model Series: UNITROL1000; Main Part No.: 3BHE014557R0104, Subcode: 3BHE006720R0001
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Available in stock , delivery time 3 days
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Architecture: Dual independent processors (control CPU + communication CPU), isolated hardware design
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Regulation Performance: Voltage regulation response time ≤5ms, built-in IEEE standard PSS power system stabilizer
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Communication Ports: RJ45 Ethernet, RS232 debugging port, Modbus RTU RS485 fieldbus
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Signal Sampling: 3-phase generator terminal voltage, stator current, excitation field current multi-channel AD sampling
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Control Modes: Auto voltage regulation, manual field current, reactive power / power factor constant control
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Protection Logic: Overexcitation, underexcitation, field loss, overvoltage, generator out-of-step, overcurrent protection
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Power Supply: 24VDC control power, wide-range DC/AC universal auxiliary power input
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Operating Environment: -25℃ ~ +60℃, 5%~95% non-condensing humidity, high EMC anti-interference
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Compatible Matching: ABB PM511 DCS CPU, PP836 HMI panel, SPAD346C3 transformer differential relay
Core Functions
- Real-time collect generator three-phase voltage and current signals, dynamically adjust excitation output current to stabilize generator terminal voltage under grid load fluctuation.
- Built-in PSS power system stabilizer suppresses low-frequency power oscillation of power grid, improving grid connection stability of generator units.
- Complete multi-level excitation limit and fault protection logic automatically limits field current or triggers trip signal to avoid generator insulation burnout damage.
- Dual communication channels upload real-time generator operating data, fault codes and historical disturbance waveforms to ABB Advant OCS DCS and PP836 local operation panel.
- Non-volatile memory stores all excitation parameters and fault records, supporting offline backup via CMT1000 software and quick recovery after board replacement.
- Support single-channel independent operation and dual-channel hot redundant switching, ensuring uninterrupted excitation control during single mainboard maintenance replacement.
Application Scenarios
- Spare AVR main control board replacement for UNITROL1000 excitation cabinets of thermal power plant steam/gas turbine generator units.
- Core excitation spare parts for hydropower station synchronous generator and diesel generator set automatic voltage regulation systems.
- Maintenance backup stock for petrochemical, metallurgical and paper mill self-owned power plant generator excitation control racks.
- Matching control hardware cooperating with ABB PM511 DCS CPU, PP836 HMI and SPAD346C3 transformer differential protection relay.
- Retrofit overhaul components for marine ship generator and biomass waste heat power generation excitation control systems.
- Global aftermarket spare inventory for power industry workshops maintaining legacy ABB UNITROL1000 excitation system hardware.