Hiquel TCP-M Phase Failure/Thermistor Relay detects phase failure, phase sequence phase asymmetry and over-temperature using PTC sensors. It can be powered with the following voltages of 3x 400VAC. Features LED indicators for power supply, relay and reaction timer and 45mm DIN rail mount housing. The TCP-M monitors phase sequence, phase failure and phase asymmetry and is used with PTC sensors to provide over temperature protection for motors and other equipment. When the phase sequence is correct, all phases are detected and the resistance of the PTC sensors on the input T1 – T2 is within the correct range, the output relay energises. At a loss of one phase (> Vn x 0.75 ) or the detection of an asymmetry imbalance >10% or when the resistance of the PTC sensors exceeds the triggering threshold (3100 Ohm) the reaction time starts.