ABB UNITOL 1020 3BHE030579R0003 Automatic Voltage Regulator

ABB UNITOL 1020 3BHE030579R0003 is an automatic voltage regulator (AVR) produced by ABB, belonging to the UNITOL 1000 series. This device is designed specifically for small and medium-sized synchronous generators and industrial machines. By controlling the excitation current of the generator’s AC exciter, it achieves precise adjustment of the generator’s output voltage.

1. Core functions and features
Voltage stability control: Real time monitoring and automatic adjustment of generator output voltage through advanced algorithms to ensure that the power system remains stable during load changes and meets the needs of different application scenarios.
Multiple fault protection: Built in functions such as overload, short circuit, overvoltage, undervoltage, temperature protection, and I ² T current limitation, effectively preventing damage to the power system due to abnormal conditions.
Flexible programmability: supports users to configure and adjust parameters according to actual needs, adapting to various complex application scenarios.
Powerful communication capability: Supports RS232 and CAN bus communication, RS232 network can support 8 devices networking, CAN bus supports up to 110 devices networking, and the initialization communication speed can reach up to 1Mbps.

2. Main technical parameters
Power requirements: The input range of the DC power supply is 12.5VDC to 48VDC; The maximum continuous current is 3A (without heat sink) or 6A (with heat sink).
Working temperature range: The standard working temperature is -40 ℃ to 55 ℃, and can be optionally extended to -55 ℃ to 85 ℃, which can adapt to harsh industrial environments.
Control mode and frequency: Supports position control, speed control, and current control modes. The control frequency of the position loop and velocity loop is 4kHz, and the control frequency of the current loop is as high as 16kHz.
I/O interface configuration: equipped with 4 digital input ports, 2 digital output ports, and 1 ± 10VDC analog input port.
Signal feedback method: Supports incremental encoders and Hall encoders (optional SSI encoder).
3. Structure and hardware design
Durable and sturdy: Equipped with a sturdy aluminum base plate and polymer casing, it not only protects all live parts from electric shock, but also maintains a stable mechanical design in high vibration situations. It can be directly installed in the machine junction box.
Human computer interaction and debugging: equipped with an intuitive local control panel to display status and measurement values; Provide USB and Ethernet ports for easy connection to CMT1000 software for device configuration, event upload, and remote access.
Indicator light diagnosis: Equipped with multiple dual color LED status indicators (such as green representing operation, yellow representing excitation on/limiter activation, red representing alarm, etc.) for quick troubleshooting.
4. Application Fields
Power plant: used for voltage regulation and control of generators, ensuring stable output voltage to meet the requirements of the power grid.
Substation: Real time monitoring and regulation of grid voltage to ensure power supply quality.
Industrial facilities: widely used in factories, mines, metallurgy, chemical and other places, providing continuous and stable power supply for industrial production.