ABB REL670 Installation And Commissioning Manual page 108

5.3.4
5.3.5
100
Distance protection
Testing the tEF timer and functionality
Procedure
1. Check and record the default configuration for the TRSP, I0CHECK,
BLKI01, BLKI02, and BLOCK functional inputs.
2. Re-configure the functional inputs TRSP and I0CHECK to connect
them to two unused binary inputs of a terminal.
3. Configure functional inputs BLKI01, and BLKI02 to the FIXD-ON
functional output and the BLOCK functional input to the FIXD-OFF
functional input.
4. Connect the binary input towards the I0CHECK functional input via
an open switch to the constant positive dc voltage.
5. Connect the binary input towards the TRSP functional input via a
closed switch to the constant positive dc voltage.
6. Decrease the measured voltages slowly until the START signal ap-
pears.
7. Close the switch towards the binary input with I0CHECK connection
and observe the START signal.
It must reset instantaneously.
8. Open the switch towards the I0CHECK functional input.
9. Open the switch towards the TRSP functional input and close with
some time delay the switch towards the I0CHECK functional input.
The START signal resets if the time difference between opening the first
and closing the second switch is shorter than the time delay set on the tEF
timer. The START signal does not reset in the opposite case.
10. Increase the measured voltages to their rated values.
Testing the tR1 timer
Procedure
1. Disconnect the dc voltage from the binary inputs connected to the
TRSP and I0CHECK functional inputs.
2. Connect the binary input towards the I0CHECK functional input via
an open switch to the constant positive dc voltage.
3. Re-configure the BLKI02 functional input to the FIXD-OFF functional
output.
4. Decrease the measured voltages slowly until the START signal ap-
pears.
Chapter 11
Verifying settings by secondary
injection