本标准描述了干式配电变压器、电力变压器和自耦变压器的某些电气、机械和安全要求以及一致性试验。这些变压器可以是单相的，也可以是多相的，带有通风、不通风或有刻度的外壳。 此类变压器可与一次或二次开关设备或变电站远程或整体关联，或同时与二次或二次开关设备或变电站关联。变压器的范围为601伏到34500伏（一次或二次），大小为1千伏安到2500千伏安。此类变压器的安装应符合美国国家标准《国家电气规范》（ANSI/NFPA 70-1987）。 根据本标准寻求认证的所有制造商应证明，通过执行本文中的试验、提交早期试验的数据、展示令人满意的现场服务证明，或通过这些方法的适当组合，已满足性能要求。绝缘系统系列可根据在一个代表性模型上进行的试验进行认证。

This standard describes certain electrical, mechanical, and safety requirements and conformance tests for dry-type distribution and power transformers and for autotransformers. These transformers may be either single-phase or polyphase, with ventilated, nonventilated, or scaled enclosures. Such transformers may be remotely or integrally associated with primary or secondary switchgear or substations, or both. The range of transformers is 601 volts through 34 500 volts (either primary or secondary) in sizes of 1 kVA through 2 500 kVA. Such transformers are intended to be installed in accordance with the American National Standard National Electrical Code (ANSI/NFPA 70-1987). All manufacturers seeking certification under this standard should demonstrate that performance requirements have been met by performing the tests herein, by submitting data from earlier tests, by exhibiting proof of satisfactory field service, or by an appropriate combination of these methods.Families of insulation systems may be certified on the basis of tests performed on one representative model.