Littelfuse 201A-AU-OT Voltage Monitor Relay Adjustable Plug-In 190-480V/3PH

The Littelfuse 201A-AU-OT is an advanced plug-in voltage monitor that is adjustable for 3-phase systems with a voltage range of 190-480V AC. It uses microcontroller-based technology that constantly checks voltage conditions to safeguard the HVAC equipment such as fan motors, air conditioners, and compressors from adverse effects of power line problems. It has adjustable trip and restart delay settings and can be set to the range from 1 to 30 seconds for the trip delay and 1 to 500 seconds for the restart delay. Advantages include minimizing nuisance tripping, easy identification of the issues through LED lights, and suitability to use with different types of motors, providing optimal performance and protection in Tough conditions.