Routine Operation and Maintenance Requirements for Surge Arresters

In daily operation, the pollution status of the surface of the Surge Arrester porcelain bushing should be checked, because when the surface of the porcelain bushing is seriously polluted, the voltage distribution will be very uneven. In an Surge Arrester with parallel shunt resistance, when the voltage distribution of one of the components increases, the current through its parallel resistance will increase significantly, which may burn out the parallel resistance and cause failure. In addition, it may also affect the arc extinguishing performance of the valve Surge Arrester.

Therefore, when the surface of the arrester porcelain sleeve is seriously polluted, it is necessary to clean and check the lead wire and grounding down-conductor of theSurge Arrester in time.

If there are burn marks, broken strands, and if the discharge recorder passes this inspection, it is most likely to find defects that are not visible to the naked eye of the arrester.

Check whether the lead wire at the upper end of the arrester is well sealed. If theSurge Arrester is not well sealed, it is easy to cause accidents due to water ingress and moisture. Therefore, it is necessary to check whether the cement joint at the joint between the porcelain sleeve and the flange is tight. Install a waterproof cover to prevent rainwater from seeping in.

Check whether the electrical distance between the arrester and the protected electrical equipment meets the requirements. TheSurge Arrester should be as close as possible to the electrical equipment being protected. The surge arrester should check the operation of the recorder after a thunderstorm; check the leakage current, and when the power frequency discharge voltage is greater than or less than the standard value, it should be inspected and tested; when the discharge recorder operates too many times, it should be inspected and repaired; Porcelain Cover with cement joints with cracks, overhaul.