GB/T 14048.2-2008

This part applies to circuit breakers used to connect to circuits with a rated voltage of no more than 1,000 V AC or 1,500 V DC. This part also specifies the supplementary requirements for circuit breakers with fuses.
This part applies to any circuit breaker with any rated current, any structural type, or any intended use.
The requirements for circuit breakers used for grounding protection are included in Appendix B.
The additional requirements for electronic overcurrent protection circuit breakers are included in Appendix F.
The additional requirements for circuit breakers used in IT systems are included in Appendix H.
The requirements and test methods for electromagnetic compatibility of circuit breakers are included in Appendix J.
The requirements for circuit breakers without overcurrent protection are included in Appendix L.
The requirements for residual current device modules (without internal current breaking devices) are included in Appendix M.
The requirements and test methods for electromagnetic compatibility of circuit breaker accessories are included in Appendix N.
The requirements for instantaneous trip circuit breakers (ICBs) are included in Appendix O.
The supplementary requirements for circuit breakers used as direct starters are specified in GB 14048.4—2003 for low-voltage contactors and starters.
The requirements for circuit breakers used for wire protection in buildings and similar locations and designed for use by unskilled personnel are specified in GB 10963.
The requirements for circuit breakers used in equipment (such as electrical appliances) are specified in GB 17701—2008.
For circuit breakers used for certain specific purposes (such as traction, rolling mills, and marine applications), some necessary special provisions and supplementary requirements may be made.