Discussion on Application of 10 kV Flame Proof and Positive Pressure Type Equipment to Underground Mine

According to the problems existed in the electric insulation,sealing and maintenance of the mine flame proof mode high voltage power distribution device with the air insulation technology,the paper analyzed the features of the air insulation,gas insulation and solid insulation applied to the present 10 kV equipment and provided and verified the gas insulation technology applied to the mine flame proof mode high voltage power distribution device.The flame proof and positive pressure(air charged) mode high voltage power distribution device with the gas insulation technology could improve the reliability of the mine underground electric power supply system.Meanwhile according to the specialty of the mine underground equipment,four key technologies to be solved were provided for the development of the mine flame proof and positive pressure(air charged) mode high voltage power distribution device.