zero phase current transformer

4 Pole Rotary Isolator Change Over Switch , Module Rear Mounting Purple Horn HAS THE DESIGN PATENT FOR THIS SERIES SWITCHES. Description: UKP series series is mainly used for communications switch 50Hz, rated voltage 440V and below, dc voltage 240V below and rated current to the electrical wiring 63A for manual less frequent switching circuit breaker or controlling and conversion, may also directly control three-phase induction motor and made to measure and control circuit.