Transient suppression in secondary distribution

Inductive kick back is caused by the current surge drawn through the feeder cables to the secondary distribution bay during the very brief time in which a short circuit is present and the fuse has not yet cleared or the circuit breaker tripped. The short circuit causes the voltage at the secondary distribution bus to drop and then, as the fuse clears or circuit breaker trips, the inductance in the feeder cables and the excessive current flowing through the feeder cables due to the short circuit, causes a voltage overshoot that can be in excess of three times the system voltage. The issue discussed in this paper is how to control the effects of inductive kick back when a fuse clears or circuit breaker trips in a secondary distribution application.