Table of Contents
Advertisement
2
Testing the interaction of the distance
protection
Testing the interaction of the distance protection
This procedure describes how to test the interaction of the distance protection zone 1 at
phase L1-earth fault in forward direction. It is recommended that all other distance pro-
tection zones and other protection functions are tested in a similar way. The test must
be done without the test switch in order to verify the interaction between the terminal
and surrounding equipment. Make sure that all personnel is informed, also in remote
station.
Procedure
1.
Make sure that the protection terminal and fitting breaker(s)
to be tested are in service.
2.
Connect the test equipment to the terminal.
3.
Set the test equipment so that the impedance present to the
relay is half the set value.
4.
Energise the protection terminal and evaluate the result i.e.
- Check that correct trip has been accomplished according to con-
figuration and philosophy.
- Check that all binary output signals that should be activated have
been activated.
- Check that all other protection functions that should be activated
by this type of fault have been activated.
- Check that no other protection functions that should not be acti-
vated have not been activated.
- Check whenever applicable that the disturbance report, event list
and disturbance recorder have been activated at perform correct
information.
Verifying the internal configuration
Chapter 11
107
Advertisement
Table of Contents
