ElectricThe RM22UA33MT with Schneider Electric VOLT MON RELAY, 380-480VAC IN,15-500VAC/DC manufactured by Schneider Electric is a voltage monitoring relay, designed to provide reliable protection of three-phase equipment from under-voltage or over-interval operations. This device is able to detect when a pre-defined voltage is reached and open or close the circuit as required. The voltage range is from 380-480 volts and the voltage range is from 15 to 500 volts. This product is ideal for monitoring supplies for applications such as contactors, starters, transformers and induction motors. It also comes with a wide range of features such as adjustable voltage trip points, adjustable time delay, LED indicators and alarm contact output. Additionally, this part meets IEC requirements and is UL and CE approved.