This standard specifies the terms and definitions, product classification, basic requirements, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage, quality commitment, etc. of power magnetic latching relays (hereinafter referred to as "relays"). This standard applies to magnetic latching relays used in electric energy meters in power systems. Magnetic latching relays used in composite switches, reactive power compensation devices, three-phase unbalanced transfer switches, smart homes, etc. can be implemented as a reference.