ABB RED670 Commissioning Manual page 134

Section 11
Testing functionality by secondary injection
11.4.8.5 Transient directional element
Since the transient directional element is operating in the time domain, based on an RL circuit model, it
expects that the input current signals have proper transitions going from healthy to faulty state. This
essentially means that the test equipment has to be able to generate currents with a DC-component
bridging the two states, without discontinuities, even when a pre-fault load current is present. If not, the
result of the test will not be valid.
11.4.8.6 Completing the test
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.
11.4.9 Power swing detection, blocking and unblocking ZMBURPSB
Prepare the IED for verification of settings outlined in Section
Values of the logical signals for ZMBURPSB are available on the local HMI under Main menu /Test/
Function status /Impedance protection/PowerSwingDetection(68,Zpsb) /ZMBURPSB(68;Zpsb):1
The Signal Monitoring tool in PCM600 shows same signals that are available on the local HMI.
11.4.9.1 Function revision history
Document
revision
A
B
C
D
E
F
G
H
11.4.9.2 Verifying the signal and settings
Measure the operating characteristics during constant current conditions. Keep the measured current as
close as possible to the rated value of the IED or lower. Ensure that it is higher than the set minimum
operating current.
Ensure that the maximum continuous current to the IED does not exceed four times of its rated value, if
the measurement of the operating characteristics runs under constant voltage conditions.
The test is mainly divided into two parts, one aim is to verify that the settings are in accordance with the
selectivity plan and another aim is to verify the operation of ZMBURPSB.
128
Product History
revision
2.2.1 -
2.2.1 -
2.2.2 -
2.2.3 -
2.2.3 -
2.2.4 -
2.2.4 Power swing unblocking feature is made available to have phase selection and thereby,
releasing distance measuring loops for faults during power swing. Added new outputs
FLTL1, FLTL2, FLTL3, FLT1PH, FLT2PH, FLT3PH, STCND, and RELCND. IEC 61850 LN is
renamed as ZMBURPSB.
2.2.5 -
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1MRK 505 378-UUS Rev. J
GUID-401518F3-26DD-4994-80A1-DE94D51945E9 v1
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GUID-7A9D2225-A0F2-4B51-8F67-C0100BB04DB9 v1
"Preparing the IED to verify
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GUID-CF76494E-8A1C-4A6E-AA98-6B2F3881501C v1
Line differential protection RED670
Commissioning manual
settings".