... 3)chinese largerst mining equipment manufacturer Purposesmining explosion-proof high voltage cable connector is suitable to coal mine well and ... of AC 3.3KV,10KV,1.12KV, frequency 50Hz,it is used for wire connection of high voltage combination switch and ... made of insulation material of high performance, good ,stable and reliable .Technical Data ModelRated Voltage(V)Rated Current(V)Frequency ...