ABB UNITROL 1020-0006 3BHE030579R0006 is an Automatic Voltage Regulator (AVR) under ABB’s UNITROL 1000 series, primarily designed for small and medium-sized synchronous generators and industrial machinery. Below is a detailed introduction:

1. Parameters & Datasheet

Electrical Parameters

Rated voltage: 120-690VAC

Frequency range: 50/60Hz

Excitation current: 10A

Excitation voltage: 240VAC

Input voltage range: 90-540VAC

Output voltage range: 0-110% of the rated voltage

Output current range: Up to 10A

Mechanical Parameters

Dimensions: Approximately 170x115x220mm (length x width x height)

Weight: Approximately 5kg

Other Parameters

Control power supply: AC input (20Vac to 250Vac), DC input (20Vdc to 300Vdc)

Operating temperature range: -40°C to 85°C

Certifications: Compliant with DNV and UL standards

2. Operating Principle

Based on microprocessor technology and IGBT semiconductor devices, the ABB UNITROL 1020-0006 first collects the output voltage and current signals of the generator, then compares these signals with the set values. When a deviation between the actual voltage and the set value is detected, the microprocessor calculates the corresponding control signal. This signal is then used to adjust the magnitude of the excitation current via the IGBT semiconductor devices—ultimately achieving precise regulation of the generator’s output voltage and ensuring it remains within the set range.

3. Application Scenarios

Power Plants: Used for voltage regulation of synchronous generators in small hydropower plants, thermal power plants, etc., to ensure power generation quality and grid stability.

Marine Sector: Suitable for power propulsion systems and auxiliary power supply systems on ships, providing stable power for various electrical equipment onboard.

Industrial Field: Applied in industries such as steel, chemicals, and textiles to drive equipment with synchronous motors (e.g., compressors, fans, pumps), ensuring stable operation and high efficiency of the equipment.