What are the regulations for power equipment testing?

Electric power equipment is divided into once a year and once every two years.

According to the national "electric power equipment preventive testing regulations":

1) high-voltage electrical equipment preventive testing: 10KV indoor electrical equipment every two years.

2) 10KV lightning arrester test every year, the general requirements of the substation in the April 1 - November 30 period into operation.

3) 0.4KV lightning arrester test once a year.

4) Power cable project: insulation resistance once a year.

5) power transformer project: winding insulation resistance and coefficient ratio once every two years.

6) insulating tools (insulating shoes, insulating gloves, high-voltage test pens, high-voltage insulating rod, etc.) every six months test.

7) current transformer, voltage transformer project: winding insulation resistance and coefficient ratio once every two years.

8) oil switch project: insulation resistance once a year.

9) relay protection device project: 10KV once every two years.

Electrical equipment in the process of operation, by the electric field force, by the operating temperature and air humidity, corrosive gases and other factors, the insulation condition will continue to deteriorate, which is a normal decline phenomenon, as long as it is in line with the operating conditions specified by the manufacturer of the equipment, it will be able to reach the safety of the period of use.

But, in the process of operation by some specific adverse factors, may make the electrical equipment can not reach the normal operating life, so the need for equipment insulation condition should be on time for regular testing and inspection. Through the analysis to identify the degree of insulation aging of electrical equipment to meet the requirements of the actual operation. And according to the inspection and test results of the analysis, to take the appropriate maintenance measures and operating regulations, in order to maintain and ensure that the normal level of equipment to ensure safe, economical and reliable operation.

Cases are as follows:

Now the State Electricity Supervision Office issued by the installation (repair, test) of the third level of qualification can undertake 110KV and the following power transformers, high-voltage and low-voltage distribution devices, lightning protection devices, insulation devices, grounding devices, power cables, switchgear preventive tests and handover tests.