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ABB UNITROL 1010 3BHE035301R1002 UNS0121A‑Z, V1 Excitation Control Unit

Technical SpecificationsModel: UNITROL 1010Part Number: 3BHE035301R1002, UNS0121A‑Z, V1Input Voltage: 63‑250V AC, 50‑60Hz, wide AC/DC power supplyContinuous Excitation Current: 10A
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Products Description
Technical Specifications

  • Model: UNITROL 1010

  • Part Number: 3BHE035301R1002, UNS0121A‑Z, V1

  • Input Voltage: 63‑250V AC, 50‑60Hz, wide AC/DC power supply

  • Continuous Excitation Current: 10A DC (@55℃)

  • Short‑time Overload Current: 25A DC (10 seconds)

  • Voltage Regulation Accuracy: ≤±0.2% steady‑state

  • Processor: 32‑bit industrial RISC microprocessor

  • Memory: 1MB ROM, 8MB SDRAM, 512KB NVRAM

  • Communication: Ethernet, RS‑485, support Modbus, IEC61850 protocol

  • Built‑in Protection: Over‑excitation, under‑excitation, over‑current, stator current limiting

  • Operating Temperature: ‑10℃ ~ +55℃; Storage temperature:‑40℃ ~ +85℃

  • Humidity: 5%‑95% RH, non‑condensing

  • Protection Class: IP20 (cabinet‑mount installation)

  • Mounting: Rack plug‑in unit for excitation cabinet

  • Dimension: 255mm × 210mm ×30mm; Weight: approx 0.72kg

UNITROL 1010 (3BHE035301R1002, UNS0121A‑Z, V1) is compact digital AVR excitation control unit of ABB UNITROL1000 series, applied for synchronous generators in hydropower, thermal power, industrial power plant and marine power system.
This controller adopts high‑performance 32‑bit microprocessor, realizes precise generator terminal voltage stabilization and reactive power adjustment by controlling excitation current. It integrates multiple limit and protection functions to safeguard generator operation. Rich communication interfaces support remote parameter setting, real‑time data monitoring and fault diagnosis, easy to connect with plant DCS monitoring system. Industrial hardware design adapts to power plant cabinet complex electromagnetic environment. On‑board LED indicators display power, running and fault status for on‑site inspection and troubleshooting.
Widely used for small‑medium synchronous generator excitation cabinet renovation and maintenance. When replacing spare parts, verify full part number and hardware revision to guarantee system compatibility. Complete power‑off and discharge operation before installation to avoid module damage and excitation system malfunction. Suitable for on‑site fault replacement and long‑term spare‑part stocking of existing UNITROL1010 excitation equipment.


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