Busbar protection against faults between circuit breaker and current transformer

摘要

The invention relates to an electrical bus system comprising a first busbar zone (Z1 Z3), at least one first feeder bay (F11-F14, F3) to which is associated a first current transformer (OCT11-OCT14, OCT3) and which is connectable to the first busbar zone (Z1, Z3) by means of a first feeder circuit breaker (CB11-CB14, CB31-CB32), the at least one first feeder bay being coupled to at least one second feeder bay (F21-F24, F4) by a bus coupling section (BCS3, BSC4, BCS5) wherein at least one current transformer (OCT1-2, OCT7-OCT8, OCT9) and at least one circuit breaker (CB6-CB7, CB8, CB9-CB10) are arranged, characterized in that the first current transformer (OCT11-OCT14, OCT3) and/or the at least one current transformer (OCT1-2, OCT7-OCT8, OCT9) of the bus coupling section is an optical current transformer.