This standard specifies the energy efficiency limit values, energy-saving evaluation values, energy efficiency levels, and test methods for AC contactors (hereinafter referred to as contactors). This standard is applicable to contactors with a rated frequency of 50 Hz, a rated working voltage not exceeding 1140 V, and a rated working current of 9A-630 A. This standard does not apply to contactors with external energy-saving devices and semiconductor contactors (solid-state contactors). 2 Normative References: The clauses in the following documents become clauses of this standard through reference in this standard. For dated reference documents, all subsequent amendments (excluding corrected content) or revisions are not applicable to this standard. Therefore, parties to agreements based on this standard are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest version applies to this standard. GB 14048.1 Low Voltage Switchgear and Control Equipment, Part 1: General (GB 14048.1-2006,1EC 60947-1; 2001, MOD) GB 14048.4: Low Voltage Switchgear and Control Equipment, Electromechanical Contactors and Motor Starters (GB 14048.4-2003, IEC 60947-4-1:2000. IDT) 3 Terms and Definitions The following terms and definitions apply to this standard. 3.1 Holding power The apparent power consumed by a contactor while maintaining its engaged state, in volts amperes (V - A). 3.2 Minimum allowable values of energy efficiency for AC contactors The maximum allowable value of the contactor's holding power under standard testing conditions. 3.3 Evaluation values of energy conservation for AC contactors The maximum allowable value of the contactor's holding power that meets the requirements of energy conservation certification under standard testing conditions
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