Why Are The Installation And Maintenance Costs Of Surge Arresters So High?
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A detailed assessment of the environmental conditions at the 11kv surge arrester installation site was conducted, including lightning frequency, grounding grid resistance, and the altitude and pollution level of the 120 kv lightning arrester location. If the grounding grid does not meet the low resistance requirements, extensive grounding electrode construction, deep burial of grounding electrodes, or installation of grounding plates are necessary, resulting in significant initial investment. For example, in a certain overhead contact system, even with the adoption of 12kv surge arrester, the maintenance workload and repair costs were still substantial.
