Harsen GU631A Generator Controller

Automatic Mains Failure (AMF) and Generator Control Module

The Harsen GU631A is an advanced Automatic Mains Failure (AMF) controller designed for monitoring, controlling, and protecting single generator systems. It automatically starts the generator in case of a mains power failure and transfers the load seamlessly, ensuring continuous and reliable power supply.

Equipped with a 128×64 LCD display and a user-friendly interface, the GU631A provides real-time monitoring of voltage, current, frequency, and engine parameters. It includes full protection features, configurable inputs/outputs, and communication ports for remote management — making it ideal for both industrial and commercial applications.

Key Features:

• Automatic, manual, and test operation modes

• True RMS measurement of generator and mains parameters

• Real-time monitoring of voltage, frequency, and current

• Built-in protection for high temperature, low oil pressure, and overspeed

• LCD screen with backlight and multilingual menu

• Communication via RS-232, RS-485, and USB ports

• Programmable I/O for flexible system control

• Event log, maintenance reminder, and fault history

• Compact, panel-mounted design for easy installation