Read the heat content in the thermal protection from the local HMI and wait until
the content is zero.
11. Switch on the injection current and check that ALARM1 and ALARM2 contacts
trip at the set percentage level and that the trip time for tripping is in accordance
with the set Time Constant 1 (Tau1).
With setting Itr = 101%IBase1 and injection current 1.50 · IBase1, the trip time
from zero content in the memory shall be 0.60 · Time Constant 1 (Tau1).
12. Check that all trip and alarm contacts trip according to the configuration logic.
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 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 trip time for
tripping and the lockout reset in the same way as described for stage IBase1.
16. Finally check that pickup and trip information is stored in the event menu.
13.5.7.2 Completing the test
SEMOD53632-51 v5
Continue to test another function or end the test by changing the TESTMODE setting to
Disabled. Restore connections and settings to their original values, if they were
changed for testing purposes.
13.5.8 Breaker failure protection, phase segregated activation and
output CCRBRF (50BF)
M12104-2 v12
Prepare the IED for verification of settings outlined in Section
"Preparing the IED to
verify settings".
The Breaker failure protection, 3-phase activation and output function CCRBRF
(50BF) should normally be tested in conjunction with some other function that
provides an initiate signal. An external BFI_3P 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-ground faults.
At mode 2 out of 4 the phase current setting, Pickup_PH can be checked by single-
phase injection where the return current is connected to the summated current input.
The value of residual (ground fault) current IN set lower than Pickup_PH is easiest
checked in back-up trip mode 1 out of 4.
1MRK 502 073-UUS A Section 13
Testing functionality by secondary injection
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062 201
Commissioning manual
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