This standard specifies the general classification and nomenclature (type, parameters), technical requirements, test methods and inspection rules of (JZC series) contactor relays. This standard is applicable to (JZC series) contactor relays, which are used to control various electromagnetic coils in control circuits with AC 50Hz (or 60HZ), voltage up to 380V, and DC voltage up to 220V to amplify or amplify signals. Passed to the relevant control components. This standard applies to the following relays: a) JZC1 series contactor relay; b) JZC2 series contactor relay; c) JZD3 series contactor relay; d) JZC4 series contactor relay. For the derived varieties or specifications of each series, the manufacturer can formulate product standards that meet the general requirements of this standard.