By rotating the rotary handle and locking ring, the IP 65 Isolator Switch isolates or breaks a circuit. This kind of non-fused isolator switch is used to isolate transformers, transmission lines, circuit breakers, and a variety of other devices. It mainly functions as a circuit breaker on your main electrical supply. It is simple and easy to use by any professional electrician in any electrical system safely with the use of this IP 65 Isolator Switch.