Fault Indicator

The fault indicator is a device installed on power cable distribution circuits, box-type substations, ring main units, and branch boxes to indicate the passage of fault current. When a short-circuit fault occurs in the line, maintenance personnel can quickly identify the faulty section, branch, and fault location through the red alarm display on the indicator. This completely transforms the outdated practice of blind line inspection and segmented switch closing with trial power restoration for fault detection, thereby significantly improving work efficiency, reducing outage duration, and effectively enhancing power supply reliability and economic benefits.