#relay

• To engage — To establish an electrical connection by closing a circuit using a switch, relay, contactor, or circuit breaker; to put an automated system or apparatus into operation. Broadly, the action describes the automatic or manual triggering of a switching mechanism, being the opposite of the term 'to trip' or 'to uncouple'.
• Engagement — The act of engaging or closing an electrical circuit; the technical operation of making a circuit or coupling a mechanism via a switching apparatus. In power systems, the process represents the restoration of current flow within a network, which can be performed manually by an operator or automatically by specialized relays following the restoration of nominal parameters.
• Engaged — Having the electrical circuit closed; coupled, connected, or put into operation via a switching device. The term describes the stable operational state of a switch, relay, or contactor whose internal contacts are firmly touching, allowing the flow of electrical current to consumers.
• Automatic reclosing — An automatic process or maneuver executed within power protection systems whereby a circuit breaker, disconnector, or power line taken out of service due to a temporary fault (short circuit, atmospheric overvoltage) is automatically reconnected to the network after a preset time interval, without the manual intervention of the operating personnel.