Completing The Test; Breaker Failure Protection Ccrbrf; Checking The Phase Current Operate Value, Ip - ABB Relion 670 Series Installation And Commissioning Manual

Section 15
Verifying settings by secondary injection
15.6.7.2
15.6.8
15.6.8.1
180
13. Switch off the injection current and check from the service menu readings of
thermal status and LOCKOUT that the lockout resets at the set percentage of
heat content.
14. Activate the digital input for cooling input signal to switch over to base
current IBase2.
Wait 5 minutes to empty the thermal memory and set Time Constant 2 (Tau2)
in accordance with the setting plan.
15. Test with injection current 1.50 · IBase2 the thermal alarm level, the operate
time for tripping and the lockout reset in the same way as described for stage
IBase1.
16. Finally check that start and trip information is stored in the event menu.

Completing the test

Continue to test another function or end the test by changing the Test mode setting
to Off. Restore connections and settings to their original values, if they were
changed for testing purposes.

Breaker failure protection CCRBRF

Prepare the IED for verification of settings outlined in section
section "Preparing for test"
The Breaker failure protection function CCRBRF should normally be tested in
conjunction with some other function that provides a start signal. An external
START signal can also be used.
To verify the settings in the most common back-up trip mode 1 out of 3, it is
sufficient to test phase-to-earth faults.
At mode 2 out of 4 the phase current setting, IP> can be checked by single-phase
injection where the return current is connected to the summated current input. The
value of residual (earth fault) current IN set lower than IP> is easiest checked in back-
up trip mode 1 out of 4.
Checking the phase current operate value,
The check of the IP> current level is best made in FunctionMode = Current and
BuTripMode = 1 out of 3 or 2 out of 4.
1. Apply the fault condition, including START of CCRBRF, with a current
below set IP>.
2. Repeat the fault condition and increase the current in steps until a trip occurs.
3. Compare the result with the set IP>.
4. Disconnect AC and START input signals.
in this chapter.
1MRK 502 029-UEN A
"Overview" and
IP>
Installation and commissioning manual