Introduction to ABB UNITROL 1020 3BHE030579R0003
UNITROL 1020 3BHE030579R0003 Product Overview
The ABB UNITROL 1020 3BHE030579R0003 is a high-performance static excitation regulator belonging to the UNITROL series, tailored for synchronous generators in power generation systems. As the core of the excitation system, it precisely regulates excitation current and terminal voltage to ensure stable generator operation, improve power quality, and enhance grid dynamic response. Featuring advanced digital control and robust hardware, it maintains reliable performance under harsh industrial conditions such as electromagnetic interference and temperature fluctuations. Compatible with ABB’s System 800xA platform, it is widely used in thermal, hydropower, and industrial cogeneration plants, ensuring safe and efficient operation of power units.

UNITROL 1020 3BHE030579R0003 Technical Parameters
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Product Model: UNITROL 1020 3BHE030579R0003
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Product Type: Static Excitation Regulator (UNITROL Series)
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Core Functions: Automatic Voltage Regulation (AVR), Manual Current Regulation (MCR), constant power factor control, excitation limit protection, fault diagnosis & alarm, seamless control mode switching
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Power Supply: 24V DC control power (19.2V-28.8V DC); 3-phase 380V AC (±10%) for rectifier unit; Power consumption: ≤30W (control unit)
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Control Specifications: Voltage regulation accuracy: ≤±0.5% of rated value; Response time: ≤20ms; Excitation magnification: 1.6-2.5 times (adjustable); Voltage adjustment range: 15%-120% of rated terminal voltage
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Interface Type: 4-20mA analog I/O for sensors and control commands; Digital I/O for status monitoring and interlocking; RS485 port (supports Modbus RTU); Backplane interface for ABB automation system integration
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Environmental Ratings: Operating temperature: -25°C to +70°C; Storage temperature: -40°C to +85°C; Relative humidity: 5%-95% (non-condensing); Vibration resistance: 2G (10-150Hz); Shock resistance: 15G
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Mechanical & Installation: DIN rail or panel mountable; Dimensions (approx.): 180mm × 250mm × 100mm; Net weight: approx. 2.5kg; Plug-in terminals for easy wiring; LED indicators for power, operation status and faults
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Protection Features: Over-excitation protection, under-excitation limit, over-voltage protection, rotor over-current protection, loss-of-field protection, PT disconnection protection, anti-EMI design, flame-retardant housing
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Compatibility: ABB System 800xA DCS, 1MW-50MW synchronous generators, ABB UNITROL auxiliary modules, standard industrial sensors and actuators
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Certifications: CE certified; Complies with IEC 61000-6-2 (EMC) and IEC 60034-1; Passes strict industrial safety and performance tests
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Applications: Thermal power plants, hydropower plants, wind power plants, industrial cogeneration systems, diesel generator sets; Synchronous generator excitation control, power quality regulation, grid stability enhancement
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