TIMING TEST....

Q. What is the need of doing timing test?
A. When fault occurs then it should be isolated as fast as possible in order to isolate fault.When we give the close command to breaker then it should be capable to make its contacts as good as in order to serve.

PROCEDURE...

1. Connect the feed back cables to poles of breaker ( R,R',Y,Y',B,B').
2. Connect the common negative wire to trip coil and close coil.
3  Connect positive wire trip coil and close coil separately.
4. Give the trip command by kit,and note down tripping time.
5. Give close command by kit , note down the closing time.
6. Give close open command by kit and note down close open time.