1.double circuit, water,oil proof 2.IP 66 protection 3. IEC 60947-5 4. Silver connector 5. Two years guarantee ApplicationCam starter is mainly used to start, stop, forward or backward directly three-phase asynchronous electric motor with AC 50Hz, voltage up to 500V and capacity up to 7.5KW , It can also be used for changeover from one kind of circuit to the other