Relay maintenance generally consists of : Inspection and burnishing of contacts. Adjustments checking (iv) Breakers tripped by manual contact closing. On such products, intensive testing is desired to prove its characteristics and to gain information about it. For example, unselective protection operation during a medium voltage network fault will cause an outage for an unnecessarily large number of consumers. Protective relays are some of the most important components in an electrical power system. However, to ensure the. Operation, maintenance, and field test procedures for protective relays and associated circuits (photo credit: Omicron) The protection circuits include all low-voltage devices and wiring connected to: instrument transformer secondaries, telecommunication systems, auxiliary relays and devices.
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