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Protective Relaying
Perform scheduled preventive maintenance in the field on protective relaying. Below are items on the recommended standard maintenance schedule for protective relays. Inspect relays for physical damage; inspect cover glass, cover gasket, presence of foreign material and moisture, condition of spiral spring, disc clearance, contacts and case grounds.
Electrical and mechanical connections will be checked, and the relays will be cleaned. Adjustments and minor repairs will be performed, as necessary.