... , IEC129, GB/T11022. GW5 outdoor AC Disconnect Switch is applicable for rated voltage 40.5kv, 72 ... AC 50Hz to make or break high voltage circuit with no load, and electric disconnecting high voltage ... bus being checked and repaired and circuit breaker etc. electric apparatuses and high voltage lines ... (KA)20, 31.5(4s)There are earthing switch type: no earthing, single earthing, double earthing ...