... forging machining and other processes to complete processing; the part is mainly used for high-voltage switch connection. Widely used in various ... SF6 circuit breaker. Voltage grade:High voltage72.5kv-252kv GIS/GCB;Ultra-high ... : Transparent oil, rust-proof oil. aluminium alloy electrical contacts GIS,5052,5083,6061-T3/T5/T6,6063,5A05,2A10,2A50