JB/T 7591-2007 in English

本标准规定了小型单相异步电动机起动元件的型式参数、技术要求、试验方法和检验规则。本标准适用于额定电压为250V及以下、额定频率为45HZ--65Hz、输出功率为5.5KW及以下的单相异步电动机中用作断开辅助绕组回路的起动元件，主要包括：离心开关、电压采样型起动开关、电流采样型起动开关、温度采样型起动开关。 本标准不适用于普通电压继电器和电流继电器。

Scope

This standard specifies the type parameters, technical requirements, test methods and inspection rules for starting components of small single-phase asynchronous motors. This standard is applicable to the starting components used to disconnect the auxiliary winding circuit in single-phase asynchronous motors with rated voltage of 250V and below, rated frequency of 45Hz ~ 65Hz, and output power of 5.5kW and below. It mainly includes: centrifugal switch, voltage sampling Type starting switch, current sampling type starting switch, temperature sampling type starting switch. This standard does not apply to ordinary voltage relays and current relays.