insulated supply system

• 不接地电源

insulated supply system的用法和样例：

例句

1. When there are system failures or lightnings, high-magnitude overvoltages will occur on these ungrounded neutrals.
   当系统发生故障或者雷电波入侵时，这些不接地变压器中性点上会出现幅值较高的过电压。