GB/T 21967-2008 in English

《GB/T 21967-2008YBZE、YBZSE系列起重用隔爆型电磁制动三相异步电动机技术条件》由TC26（全国旋转电机标准化技术委员会）归口，主管部门为中国电器工业协会。
本标准规定了YBZE、YBZSE系列起重用隔爆型电磁制动三相异步电动机的型式、基本参数与尺寸、技术要求、检验规则与试验方法以及标志、包装及保用期的要求。本标准适用于各种起重机械电力传动用隔爆型电磁制动三相异步电动机，凡属本系列电动机所派生的各种系列电动机均可参照执行。本系列电动机防爆性能符合GB 3836.2-2000的规定，制成隔爆型。防爆标志为ExdⅠ、ExdⅡAT4、ExdⅡBT4、ExdⅡCT4。分别适用于煤矿井下设备及工厂ⅡA级、ⅡB级、ⅡC级，引燃温度为T1～T4组的可燃性气体或蒸气与空气形成的爆炸性混合物的场所。

Scope

This standard stipulates the type, basic parameters and dimensions, technical requirements, inspection rules and test methods, marking, packaging and warranty period requirements of YBZE and YBZSE series flameproof electromagnetic brake three-phase asynchronous motors. This standard applies to all kinds of hoisting machinery power transmission flameproof electromagnetic braking three-phase asynchronous motors (hereinafter referred to as motors), and all series of motors derived from this series of motors can be referred to for implementation. The explosion-proof performance of this series of motors meets the requirements of GB 3836.2-2000 and is made of explosion-proof type. The explosion-proof marks are Exd I, Exd Ⅱ AT4, Exd Ⅱ BT4, Exd Ⅱ CT4. They are respectively suitable for underground coal mine equipment and factories of Class IIA, IIB, and IIC, where the ignition temperature is flammable gas or explosive mixture of steam and air in Group T1~T4.