本标准适用于501 kVA及以上的密封干式变压器，高压601至34500伏，低压208Y/120至4160伏。本标准旨在阐述与性能、有限的电气和机械互换性有关的特性，并帮助正确选择此类设备。本标准不适用于其他类型的变压器，如专用、通风干式、挂载式变压器 干式、液浸、仪表、调节、炉、矿和整流器操作。

This standard is for sealed dry-type transformers, 501 kVA and larger, with high-voltage 601 to 34500 volts inclusive and low-voltage 208Y/120 to 4160 volts inclusive. This standard is intended to set forth characteristics relating to performance, limited electrical and mechanical interchangeability, and to assist in the proper selection of such equipment.This standard does not apply to other types of transformers, such as specialty, ventilated dry-type, padmounted dry-type, liquid immersed, instrument, regulating, furnace, mine, and rectifier operations.