html{display:none} Fault Locating | Schweitzer Engineering Laboratories

The built-in fault-locating methods in SEL devices allow you to quickly identify faults, dispatch crews for repairs, and restore service faster.

Traveling-wave fault-locating technology calculates the locations of temporary and permanent faults by measuring the arrival times of the naturally occurring traveling waves caused by a transmission line fault. Accurately detecting these waves requires ultra-high-resolution monitoring, and locating is accurate to within one tower span (±300 m).

Impedance-based fault-locating technology calculates fault locations by detecting changes in line impedance as a result of a fault. Impedance-based locating is reliable and accurate to about 2 percent of a line’s total length.

Traveling-Wave-Based Fault Locating

Use ultra-high-resolution monitoring to detect traveling waves propagating from temporary or permanent faults, as well as fault precursors. These devices also include impedance-based fault-locating methods to detect faults producing traveling waves that are too weak or distorted for use.