RTN-8370 thermal overload relay 320...500A

RTN-8370 thermal overload relay with possible I_max calibration 320...500A is designed to protect AC circuits and motors against:
− overloads;
− phase failure;
− long starting time;
− prolonged stalled rotor condition.
The thermal relay controls permanently the current driven by the motor. When this current exceeds the setting it's auxiliary contacts will change state, causing the motor to stop.