LWY: In a building, how do we provide for protection against overvoltage switching? What are its origins and magnitude? How do we protect against it?
LWY: In a building, how do we provide for protection against overvoltage switching? What are its origins and magnitude? How do we protect against it?
在一幢建筑里，我们如何防护过电压转换？它的来源和幅值是什么？我们如何防护它？