This device is a three-phase voltage and phase sequence protection relay for motors. Key specifications include:
Rated Operating Voltage: Three-phase AC 380V.
Overvoltage Protection Range: Adjustable from AC 380V to 460V.
Undervoltage Protection Range: Adjustable from AC 300V to 380V.
Protection Function: Includes overvoltage, undervoltage, phase loss, and incorrect phase sequence protection.
Phase Protection Action: If phase sequence is incorrect or a phase is lost, it prevents the motor from starting.