Directional Short-Circuit and Directional Earth Fault Indicator

HOW FAULT INDICATORS WORK

Fault indicators are used to loate earth-faults or short-circuits in power distribution networks. The aim of using fault indicators is to have a reliable, cost efficient and fast indication of the fault location in the network.

In open ring systems, the damaged line section can be disconnected from the network, as soon as a fault is located. While the service team repairs the damaged cable, the rest of the network can be powered up. In this way, the down-time of the network can be minimized to increase the quality of the infrastructure. 
But also in radial distribution systems, fault indicators help to locate the faulty cable quickly and cost efficiently without the need of harmful switching operations to locate the fault.