ABB Relion 670 Series Commissioning Manual page 134

Section 11
Testing functionality by secondary injection
11.5.5.2 Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to the original values, if changed for testing purposes.
11.6 Unbalance protection
11.6.1 Shunt capacitor cascading failure protection SCCFPVOC
Prepare the IED for verification of settings outlined in Section
11.6.1.1 Function revision history
Document
revision
D
E
F
G
H
J
K
11.6.1.2 Verifying the signals and settings
A shunt capacitor cascading failure protection SCCFPVOC 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
1. Set the following parameters:
•
•
•
•
•
•
2. Values of the logical signals and the service values for SCCFPVOC are available on the local
HMI under: Main menu/Tests/Function status/Unbalance protection/
CapBankCascadingFail(51V,2(I>/U<))/SCCFPVOC (51V, 2(I>/U<)):x, where x = instance
number.
128
Product History
revision
2.2.3 -
2.2.3 -
2.2.4 -
2.2.4 -
2.2.4 -
2.2.4 -
2.2.5 The harmonic restraint function changed to freeze the definite timers.
Operation = ON
Operation1 = ON (Step 1)
CurrentInput = negSeq
VoltageInput = negSeq
I > = 125% IBase
VDepFact1 = (1-117)/I> = 0.064
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1MRK 511 403-UEN Rev. K
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"Preparing the IED to verify
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Bay control REC670
Commissioning manual
SEMOD175023-47 v4
settings".