test on internal overvoltage

例句：

1. 1. The engineers must test the equipment for internal overvoltage before using it.
   工程师在使用设备之前必须对其进行内部过电压测试。
2. 2. The power company is required to test the transmission lines for internal overvoltage.
   电力公司被要求对输电线路进行内部过电压测试。
3. 3. During the testing, the engineers found that the equipment was not functioning properly due to internal overvoltage.
   在测试过程中，工程师发现设备由于内部过电压问题而无法正常工作。