ABB UNITROL 1005-0012 3BHE043576R0012 Automatic Voltage Regulator

Product Introduction

The ABB UNITROL 1005-0012 (3BHE043576R0012) Automatic Voltage Regulator is a compact and high-performance AVR designed for reliable voltage control in generator excitation systems. It is engineered to deliver accurate, stable, and fast-reacting voltage regulation, supporting consistent electrical performance across a wide range of operating conditions.

UNITROL 1005-0012 operates using closed-loop control principles, continuously monitoring generator voltage and dynamically adjusting excitation output. This ensures tight voltage control during steady-state operation as well as rapid correction during transient events such as load changes, grid disturbances, or system start-up.

As part of the ABB UNITROL family, this automatic voltage regulator reflects ABB’s long-standing expertise in excitation and power control technology. Its compact form factor and robust control design make it suitable for both new installations and modernization projects in industrial and power generation environments.

Product Specifications

Applications

• Synchronous generator excitation systems, maintaining stable terminal voltage under varying load conditions

• Power generation plants, including industrial, captive, and utility-based generation facilities

• Backup and standby generator systems, ensuring reliable voltage control during grid outages

• Industrial power systems, supporting voltage stability for critical electrical infrastructure

• Generator modernization projects, upgrading legacy excitation equipment with ABB AVR solutions

• Distributed generation applications, where compact and reliable voltage regulation is required

Advantages

• Accurate voltage regulation, supporting consistent generator output quality

• Fast transient response, minimizing voltage deviation during load or system disturbances

• Compact and space-saving design, suitable for modern control cabinet layouts

• High operational reliability, designed for continuous industrial use

• Seamless compatibility with ABB systems, reducing integration and commissioning effort

• Proven UNITROL technology, widely used in generator excitation applications

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