What is a lockout relay used for?

What is a lockout relay used for?

Lockout relays are used by many utilities in electrical power transmission substations to trip and hold out of service a protection zone on the occurrence of a relay operation that requires inspection and/or repair before the zone may be safely placed back in service.

What is meant by lockout relay?

Lock out relay is an electromechanical relay which latches its output contact. As the name suggests, this relay once operated locks out the circuit. Locking out means that circuit cannot be normalized until and unless this relay is reset. This relay is also known as Master Trip Relay and its ANSI code is 86.

What is the 86 lockout relay?

Lockout relays are nothing but a manual reset relays, which ensure the fault has been cleared or inspected correctly. Lockout relays are activating multiple contacts at the same time.

What is 86 lockout relay used for?

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 …

How does a reset relay work?

It is a relay that is set (ON) or reset (OFF) by the input of a pulse voltage. Even after the input voltage is interrupted, this relay maintains its set or reset condition until it receives the next inverting input. It is also called a keep relay.

What resistance does a lockout relay have?

Now, 90 ohms of resistance are in the lockout relay coil, 9.9 ohms in the compressor contactor coil, and 0.1 ohms occurring elsewhere in the wires.

How must a latching relay be reset?

What’s a latching relay? It is a relay that is set (ON) or reset (OFF) by the input of a pulse voltage. Even after the input voltage is interrupted, this relay maintains its set or reset condition until it receives the next inverting input. It is also called a keep relay.

What is a lockout circuit?

[′läk‚au̇t ‚sər·kət] (electronics) A switching circuit which responds to concurrent inputs from a number of external circuits by responding to one, and only one, of these circuits at any time.