本应用指南涵盖了为额定最大电压高于1000 V的交流高压断路器应用标准瞬态恢复电压（TRV）额定值所需的程序和计算。这些断路器的开断能力极限在很大程度上由TRV确定。本应用指南不包括在其他现有断路器标准中。在本文件中，TRV评级与典型的系统TRV职责进行了比较。如果TRV占空比超过断路器的TRV额定值，则给出了TRV计算示例和建议选项。

This application guide covers procedures and calculations necessary to apply the standard transient recovery voltage (TRV) ratings for ac high-voltage circuit breakers with rated maximum voltage above 1000 V. The breaking capability limits of these circuit breakers are determined to a great degree by the TRV. This application guide is not included in other existing circuit breaker standards. In this document, the TRV ratings are compared with typical system TRV duties. Examples of TRV calculation are given with suggested options if the TRV duty exceeds the TRV ratings of the circuit breaker.