What is the purpose of master trip relay?
Table of Contents
What is the purpose of master trip relay?
Defination: Master trip relay is a contact multiplication or an Auxillary relay, which operates on the command from Multiple protection relays and gives a Single Commmand to the Breaker Trip Coil.
What is the purpose of trip coil used in circuit breaker?
Trip coils are the release components in circuit breakers used in energy distribution for the switching of high currents. It is their task to interrupt fault currents/voltages so that downstream systems are not damaged.
What is 86g relay?
86 G (Generator Lockout relay):- 1. 59 G= Generator O/V =110 \% Alarm &120\% Trip within0.05 seconds. 2. 27 G= Generator U/V =90 \% Alarm &80 \% Trip within2 seconds, Also Trip command comes from AVR(Automatic Voltage Regulator.
What is trip free circuit breaker?
definitions of “Trip-Free”: • In the most general definition of “Trip-Free,” the contacts of the circuit breaker must return to the open position and remain there when an opening operation follows a closing operation, regardless of whether the closing signal, force, or action is maintained.
How does lockout relay work?
The lockout relay contains a trip coil that typically unlatches a spring that mechanically forces the relay’s contacts to changeover. A normally open contact of the latching relay is included in each breaker trip circuit, disconnect open circuit, and each transfer trip send circuit required to trip the zone.
Why do we provide supervision for tripping mechanism why not for closing of CB?
So if any of the intermediate contacts is detached, the circuit breaker fails to trip. Not only that, if DC supply to the trip circuit fails, the CB will not trip. To overcome this abnormal situation, trip circuit supervision becomes very necessary.
What is use of lockout relay in HT voltage?
Answer: A lockout relay is palced in line before or after the switch so the power can shut off at one of the central location. Basically it is a master trip relay which takes all the signals from the relay and finally trips the breaker during faulty condition.