ABB UNITROL 1020 3BHE030579R0003

3BHE030579R0003 is a digital Automatic Voltage Regulator (AVR) belonging to the ABB UNITROL1020 series. Exclusively engineered for the excitation control of synchronous generators, it enables precise voltage regulation and stabilization in power grids. This product is well-suited for a wide array of applications, including onshore power plants, marine electric propulsion systems, traction locomotives, and wind power facilities.

Main Parameters

• Model/Order Number: 3BHE030579R0003 V1 (UNS0119A-Z)
• Applicable Generator: Synchronous generator (static excitation system)
• Control Accuracy: ±0.5% (typical value)
• Operating Temperature Range: -25 °C to +70 °C
• Supply Voltage: 12.5 VDC to 48 VDC
• Maximum Excitation Current: 40 A (compact AVR)
• Communication Interface: Modbus RTU (RS-485)
• Protection Functions: Over-excitation, under-excitation, overvoltage, undervoltage, overcurrent, loss of excitation, etc.
• Mounting Method: Panel/standard cabinet mounting

Product Features

1. High Precision and Fast ResponseEquipped with advanced control algorithms, it achieves a voltage regulation accuracy of ±0.5% with a short response time, capable of rapidly suppressing voltage fluctuations.
2. Multiple Protection MechanismsBuilt-in protection functions against over-excitation, under-excitation, overvoltage, undervoltage, overcurrent, and loss of excitation enhance overall system safety.
3. Modular DesignFeaturing a compact structure, it allows for easy panel or cabinet mounting. This design simplifies post-installation maintenance and reduces on-site deployment costs.
4. Programmable and Flexible ConfigurationSupporting user-defined parameters and compatible with multiple fieldbuses (Modbus RTU), it enables seamless integration with upper-level systems such as PLC and DCS.
5. High ReliabilityManufactured with high-quality components, it complies with international certifications including CE, UL, RoHS, and IEC 60146, making it suitable for operation under harsh working conditions.

Structure and Components

1. Main Control UnitThe digital signal processor (DSP) is responsible for voltage measurement, execution of control algorithms, and communication management.
2. Excitation Power ModuleIt delivers a maximum excitation current of 40 A, adopting IGBT/IGBT modules to realize high-efficiency power conversion.
3. Input/Output InterfacesEquipped with 4 digital inputs, 2 digital outputs, and 1 ±10 V analog input, it meets diverse on-site signal requirements.
4. Communication BoardThe Modbus RTU (RS-485) interface supports remote monitoring and parameter adjustment.
5. Heat Dissipation SystemAir-cooled or water-cooled options are available to ensure stable operation within the temperature range of -25 °C to +70 °C.

Typical Application Fields

• Onshore power plants (diesel engines, gas turbines, steam turbines)
• Marine electric propulsion and auxiliary power supply systems
• Traction locomotives (diesel-electric locomotives)
• Wind farms (direct-drive synchronous generators)
• Industrial and commercial power distribution systems requiring precise voltage control

If you would like to learn more about our products and services, please feel free to contact us at any time!

• Sales Manager : Jinny
• Email : sales5@xrjdcs.com
• Whatsapp/Mobile:+86 15359273791

Global renowned brand cooperation

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Triconex  丨   Foxboro 丨   ICS Triplex  丨  Hima  丨  Schneider 丨  Yokogawa  丨 Woodward

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