ABB REL670 Installation And Commissioning Manual page 161

Scheme communication
Inject current (65 ° lagging the voltage) in one phase at about 110%
2.
of the set operating current, and switch the current off with the
switch.
3. Switch the fault current on and measure the operating time of the
EFC logic.
Use the TRIP signal from the configured binary output to stop the timer.
4. Compare the measured time with the set value tCoord.
5. Activate the CR binary input.
6. Check that the CRL output is activated when the CR input is activat-
ed.
7. Switch the fault current on (110% of the setting) and wait longer than
the set value tCoord .
No TRIP signal should appear.
8. Switch the fault current off.
9. Reset the CR binary input.
10. Activate the BLOCK digital input.
11. Switch the fault current on (110% of the setting) and wait for a period
longer than the set value tCoord.
No TRIP signal should appear.
12. Switch the fault current and the polarizing voltage off.
13. Reset the BLOCK digital input.
Permissive scheme
Procedure
1. Inject the polarizing voltage 3U0 which is 5% of UBase (Four step
PEFM) and with the current lagging the voltage by 65 ° .
Inject current (65 ° lagging the voltage) into one phase at about 110%
2.
of the set operating current, and switch the current off with the
switch.
3. Switch the fault current on, (110% of the setting) and wait longer than
the set value tCoord.
No TRIP signal should appear, and the CS binary output should be acti-
vated.
4. Switch the fault current off.
5. Activate the CR binary input.
Chapter 11
Verifying settings by secondary
injection
153