Fault Passage Indication is the use of a protection asset to flag whether a network parameter excursion (current, voltage, frequency or a combination thereof) was detected at a node in the distribution network. Typically, a pickup level is set, with a short hysteresis operating time, to set a flag for possible fault passage through a node.

Using Automatic Battery Testing for Controlling Maintenance Intervals on Automatic Circuit Reclosers.

Providing Selectivity of SEF Protection for High Impedance Faults and Compensated Neutral Networks

SEL has released several important enhancements to the SEL-FT50 Fault Transmitter, making the SEL-FT50 and SEL-FR12 Fault Transmitter and Receiver System even more accurate in detecting faults, more power-efficient, and easier to install.