9. Simultaneously disconnect all the three-phase voltages from the IED.
No TRIP signal should appear.
10. Reset the BLKU binary input.
11. Inject the measured voltages at rated values for at least set tRestore time.
12. Activate the BLOCK binary input.
13. Simultaneously disconnect all the three-phase voltages from the IED.
No TRIP signal should appear.
14. Reset the BLOCK binary input.
11.6.6.2 Completing the test
SEMOD175023-47 v4
Continue to test another function or end the test by changing the TESTMODE setting to Disabled.
Restore connections and settings to the original values, if changed for testing purposes.
11.7 Unbalance protection
GUID-5E075378-BE05-4C5F-AD92-568C2D84CCF1 v1
11.7.1 Shunt capacitor cascading failure protection SCCFPVOC (51 V)
GUID-08928884-88E3-4A40-9B50-BDA5F1A451D9 v1
GUID-079BCF22-469C-42EA-B857-E28154EC13D9 v1
Prepare the IED for verification of settings outlined in Section
"Preparing the IED to verify settings".
11.7.1.1 Function revision history
GUID-D7C922F5-2C3F-40E2-8B7F-B42F12597971 v1
Document
revision
Product
revision
History
D 2.2.3 -
E 2.2.3 -
F 2.2.4 -
G 2.2.4 -
H 2.2.4 -
J 2.2.5 The harmonic restraint function changed to freeze the definite timers.
11.7.1.2 Verifying the signals and settings
GUID-E395E984-9995-4CE4-A13B-035F77BC035E v1
A shunt capacitor cascading failure protection SCCFPVOC (51 V) function has the following modes of
operation:
• Two step negative sequence voltage restrained over-current protection
• Two step zero sequence voltage restrained over-current protection
Verification of negative sequence-based operation
GUID-4F1928D9-59DE-4422-8930-1FF332D2F5BE v1
1. Set the following parameters:
• Operation = Enable
• Operation1 = Enable (Step 1)
• CurrentInput = negSeq
Section 11 1MRK 504 165-UUS Rev. J
Testing functionality by secondary injection
214 Transformer protection RET670
Commissioning manual
© 2017 - 2021 Hitachi Power Grids. All rights reserved
To Next Page
Loading...
