Abstract Vacuum circuit breakers are known to potentially cause voltage escalation when interrupting small currents. Consequently, their installation in electrical systems may require the use of specific means aiming at reducing overvoltages. In this paper, the subject is explored in a configuration of an industrial plant. A medium-voltage transformer is connected to the electrical feeding system using a cable equipped with a breaker on the opposite terminal. The risk of voltage escalation is studied when the transformer loaded with a small inductive load is switched off. The study is conducted with an EMTP-like software program; a detailed high-frequency model of the transformer is used as well as a vacuum circuit breaker model able to represent current chopping and restriking. The protection provided by surge arresters and a filter is also studied.

中文翻译：

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用真空断路器分断小、中压变压器电流

摘要 众所周知，真空断路器在中断小电流时可能会导致电压升高。因此，它们在电气系统中的安装可能需要使用旨在降低过电压的特定方法。在本文中，该主题在工业工厂的配置中进行了探索。中压变压器使用一根电缆连接到供电系统，该电缆在对端装有断路器。对负载有小感性负载的变压器关闭时电压升高的风险进行了研究。该研究是使用类似 EMTP 的软件程序进行的；使用了变压器的详细高频模型以及能够表示电流斩波和再起弧的真空断路器模型。