IEC 60034的本部分适用于旋转电机外壳防护等级的分类。它定义了防护外壳的要求，这些防护外壳在所有其他方面都适合其预期用途，并且从材料和工艺的角度来看，确保本文件中涉及的性能在正常使用条件下保持不变。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This part of IEC 60034 applies to the classification of degrees of protection provided by enclosures for rotating electrical machines. It defines the requirements for protective enclosures that are in all other respects suitable for their intended use and which, from the point of view of materials and workmanship, ensure that the properties dealt with in this document are maintained under normal conditions of use.All current amendments available at time of purchase are included with the purchase of this document.