IEC 61643-352:2018涵盖了浪涌隔离变压器（SIT）的应用，该变压器用于信号电平高达400V峰间的电信变压器应用中。这些变压器在输入和输出绕组之间有或没有屏蔽，具有高额定冲击电压。SIT是浪涌保护组件，用于缓解共模电压浪涌的向前传播。本文件描述了SIT的选择、应用原则和相关信息。本文件不包括电力线通信变压器。

IEC 61643-352:2018 covers the application of surge isolation transformers (SITs) that are used in telecommunication transformer applications with signal levels up to 400 V peak to peak. These transformers have a high rated impulse voltage with or without screen between the input and output windings. SITs are components for surge protection and are used to mitigate the onward propagation of common-mode voltage surges. This document describes SITs' selection, application principles and related information. This document does not cover power line communication transformers.