兆欧表的使用及常见故障的检修

Megohmmeter Use and Troubleshooting of Common faults

兆欧表是检查电气设备绝缘状态的最简便的辅助方法，能发现电气设备导电部分影响绝缘的异物，绝缘局部或整体受潮和脏污，绝缘油严重劣化，绝缘击穿和严重热老化等缺陷。因此，电气检修、运行和试验人员不仅应掌握兆欧表的使用方法，还应掌握兆欧表常见故障的正确处理方法。

Megohmmeter is the most convenient method to check the status of auxiliary insulation of electrical equipment, it can detect the foreign matter that affects the insulation at conductive parts of electrical device, insulation part and the overall moisture and dirt, serious deterioration of insulating oil, insulation breakdown and severe thermal aging and other defects. Therefore, the electrical maintenance, operation and test personnel should not only master the use of the method, but also should know the methods of common fault handling.