Electric distribution system with coordination between closure switch and line breaker

摘要

The electrical distribution network has a supply circuit breaker (DP) at the head of the principal lines (LP) and automatic reclose circuit breakers (DRR) at the head of the feeder lines (LD). A coordination unit (BCO) is placed between the fault detectors (DD) at the head of the principal line and the line breaker (DP).The coordination unit has a memory (MM) that retains a masking time slightly greater than the reaction and closure time of the auto-reclosing circuit breaker in the feeder, and also a masking time equal to the opening time of the auto-reclose breaker.