Lock Out Relay | Master Trip Relay | What is a Lock Out Relay | Principle & Types of Lockout Relay

Описание к видео Lock Out Relay | Master Trip Relay | What is a Lock Out Relay | Principle & Types of Lockout Relay

An important type of “accessory” relay, especially for legacy electromechanical protective relays, is the so-called auxiliary or lockout relay, designated by the ANSI/IEEE number code 86. The purpose of an 86 relay is to serve as an intermediary element between one or more protective relays and one or more control devices, both expanding the number of control elements actuated by any one protective function and also providing a “latching” function which must be intentionally reset in order to resume normal operation of the system.

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