Single Phasing Preventer

Voltage Sensing SPP & Autoswitch: It gives protection at sensing points only. It senses Negative sequience Component of Voltage and protects the motor against phase failure. Unbalanced supply and reverse phase sequence of voltage.For autoswitch,no need of opretor,It automatically start the motor.   Single Phasing Reverse Phasing: If any one phase is removed, the unit will trp the motor.when phase sequens is reversed,motor rotates in reverse direction.this condition is not desirable to run the motor, the unit will trip the motor.