1A CTs: The WIP1 is a self-powered time overcurrent relay with multi-characteristics and including earth fault protection. Definite time and inverse time tripping characteristics can be selected. Due to its wide setting ranges, the tripping characteristic can be selected to protect a wide variety of different equipment. The WIP1 does not require any aux. voltage supply, consequently it can also be used for switchboards with-out auxiliary power supply. It takes its power supply energy from the C.T. circuits and provides the tripping pulse energy to the circuit breaker.
The WIP1 is a robust protective device that is designed for a long-time operation with minimum maintenance efforts even under extreme climate conditions.