... -3900 air circuit breaker Certificates: CCC, CB, CE, KEMA Standards: GB 14048.2 ,GB 14048.4, IEC 60947-2, IEC Delixi DW17 series air circuit breakerCertificates: CCC, CB ... , 2:30pm~ 6:00pm) Features1, distribute electric energy2, switch the circuit infrequently3, protect distribution system, motor, etc. From overload, short ...