ABB REL670 Installation And Commissioning Manual page 109

5.3.6
5.3.7
Distance protection
5. Close the switch towards the I0CHECK binary input and observe the
START signal.
It must reset with the time delay set on the tR1 timer. It is also possible
to measure this time delay with the timer, which starts with the closing of
a switch and stops with the resetting of a START signal on the corre-
sponding binary output.
6. Increase the measured voltages to their rated values.
Testing the tR2 timer
Procedure
1. Disconnect the dc voltage from the binary input connected to the
I0CHECK functional input.
2. Re-configure the functional input BLKI02 to the FIXD-ON functional
input and BLKI01 to the OFF functional output.
3. Decrease slowly the measured voltages until the START signal ap-
pears.
It should reset after the time delay, set on tR2 timer. It is also possible to
measure the time delay tR2.
4. Connect for this purpose the timer to the binary output with the
START signal.
5. Start the timer with change of the signal from 0 to 1 and stop it with
the change from 1 to 0.
6. Increase the measured voltages to their rated values
Testing the block input
Procedure
1. Re-configure the functional input BLOCK to the binary input, to
which the I0CHECK has been configured so far.
2. Re-configure the functional input BLKI01 to the FIXD-ON functional
input.
3. Decrease slowly the measured voltages in all three phases until the
START signal appears.
4. Close the switch towards the BLOCK binary input and observe the
START signal.
It must reset instantaneously.
5. Increase the measured voltages to their rated values.
6. Re-configure the functional inputs TRSP, I0CHECK, BLKI01, BLKI02,
and BLOCK to restore their original configuration.
Chapter 11
Verifying settings by secondary
injection
101