Periodically measure insulation resistance, inspect motor sheath grounding.
定期测量绝缘电阻，检查机壳接地情况。
2
The principle, main design point and no load voltage ratio calculation method of resin insulation dry-type grounding transformer are introduced.
介绍了树脂绝缘干式接地变压器的工作原理、设计要点及空载电压比的计算方法。
3
The method of grounding the neutrals of the transformers affects the degree of protection that can be given them and the amount of insulation they need.