... install We Xiamen Leelen High Voltage Electric Co.,Ltd,is a professional OEM/ODM manufacturer about switchgear conponents,such as ... avoid serious accident in distribution power networks,especially those in which a large number of ring main units are used, the upper ... circuit alarming current: 150A to 2000AEarthing alarming current:10A ,20 A,30A,40A,50A,60A+-1Temperature range : -15 to +60Humidity: ...