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