... about switchgear conponents,such as voltage indicator,heater,short circuit and earth fault indicator,blocking magnet,Led light,voltage sensor, ... length : 3.5mConduct optical fiber length 10m(MAX)Power supply: lithium battery 3.6V/2.45AhAuto-reset time : 7s,1hrs,2hrs ... the sensor circuit from high voltage, so ensure the safety and reliability. With self-locking type output relay Individual advantages1. ...