本标准提供了证明新的IE级变压器（位于IEEE Std 323？1中定义的核电站的温和环境中）在假定的工作条件下执行其所需安全功能的充分性的要求。本标准适用于额定电压为601 V至15 000 V的单相和三相变压器，适用于最高电压绕组，最高可达2500 kVA（基本额定值）。

This standard provides requirements to demonstrate the adequacy of new Class IE transformers, located in a mild environment of a nuclear power generating station as defined in IEEE Std 3231, to perform their required safety functions under postulated service conditions. This standard applies to single- and threephase transformers rated 601 V to 15 000 V for the highest voltage winding and up to 2500 kVA (base rating).