This device is installed on the overhead lines on the road, which is used to monitor and check earthing lines and short-circuit fault; and through sparking, turnover and other local alarm methods to indicate the position of fault.
Fault Detection：Short-circuit fault, adaptive without setting fixed value; single-phase earth fault
Alarm Methods：turnover，360o observable the flashing visible distance of night lights flashing visible distance is more than 300 m.
Automatic Reset: Automatic reset after fault clearance to restore power；or, automatic reset in time
Prevent Maloperation：Load fluctuations, large load cutting, no-load switching-in of transformer inrush current, circuit switching inrush current, near line fault and reclosing maloperation and other prevention functions.
Remove with electricity: it can be installed and removed with electricity, no false alarm while operating.
Rust corrosion：Long-term outdoor operation, the structure is made by rust corrosion materials