... about switchgear conponents,such as voltage indicator,heater,short circuit and earth fault indicator,blocking magnet,Led light,voltage ... transmission6. Low voltage of the battery alarming indicationTechnical data: Short circuit alarming current: 150A to 2000AEarthing alarming current:10A ,20 ... .100% inspected before packing and shipping2.with QC report Cable Short Circuit and Earth Fault Indicators