Earth grounding fault protection circuit

.FC W 1 three-pole circuit breaker shall be selected for TN-C, TN-C-S and TN-S power distribution system without any additional output current transducer

.Earth grounding fault protection signal only can use the vector of three-phase current, and definite time delay protection shall be considered

.FCW l Your-pole circuit breaker shall be selected for TN-S power distribution s- ystem, and earth grounding faultprotection si}ual only can use the sector of three- phase current, and definite time delay protection shall he considered

.FCW l three-pole circuit breaker shall be adopted for TN-S power distribution s- ystem .Output neutral line N currenteransducer shall be used for earth aroundin} fault protection (connected to No.6 andN0.7 terminal end), and the longest distance fr- om the installation site of the transducer to circuit breaker is 3m

.Earth grounding fault protection signal only can use three-phase current and the vector of N-phase current and definite time delay protection shall be considered