GB 21518-2022 English PDF (GB21518-2022)

This document specifies the energy efficiency grades, minimum allowable values of energy efficiency, sampling, test and calculation methods for AC contactors (hereinafter referred to as contactors). This document is applicable to three-pole electromechanical, direct-acting integral contactors with a rated frequency of 50 Hz, a rated operating voltage of the main circuit of 1,000 V and below, a rated operating current of 6 A ~ 630 A, a rated control power supply voltage of the contactors of AC 440 V and below, and an application category of AC-3. This document does not apply to household and similar-purpose contactors with external power-saving devices and semi-conductor contactors (solid-state contactors). NOTE: the ¡°direct-acting¡± type described in this document refers to products in which both the contact system and the electromagnetic system are direct-acting.