insulation class

例句：

1. 1. The insulation class of the cable is rated at 25kV.
   电缆的绝缘等级为25kV。
2. 2.The insulation class of the wire is rated at 10kV.
   电线的绝缘等级为10kV。
3. 3.The insulation class of the transformer is rated at 10kV/10kVA.
   变压器的绝缘等级为10kV/10kVA。