EKL2 single-phase flashing cable fault indicator

A fault indicator is a device installed on power lines (overhead lines, cables, and busbars) that indicates fault current. Most fault indicators can only detect short-circuit faults by identifying the characteristics of short-circuit current.

Overview:

A fault indicator is an electromagnetic device that displays a fault sign (red card) when short-circuit current passes through it. Installing these fault indicators along the distribution line, once a fault occurs, the short-circuit current flows, causing the fault indicator to actuate and the red card to appear. By inspecting the line, if all fault indicators from the power source to the fault point show the red card, and those beyond the fault point do not, the fault point can be determined to be between the last red card and the first non-red card.

Fault indicators typically include current and voltage detection, fault discrimination, fault indicator drive, fault status indication, signal output, and automatic delayed reset control.

Fault indicators are generally installed on overhead lines, overhead cables, or underground cables, as well as on busbars in switchgear cabinets. Therefore, they detect voltage by sensing the spatial electric field potential gradient and detect line current through electromagnetic induction.