... switchgear conponents,such as voltage indicator,heater,short circuit and earth fault indicator,blocking magnet,Led light,voltage sensor,temperature and ... DJ-3100 is used for detecting the short circuit and earth fault of the electrical equipment. In order to avoid serious ... ,30A,40A,50A,60A+-1Temperature range : -15 to +60Humidity: <=95%Earth lead length : 3.5mConduct optical fiber length 10m(MAX)Power ...