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Section 10
Testing functionality by secondary injection
10.4.13
10.4.13.1
142
2
1
0
1
0
-1
2
1
0
2
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2
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-1
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0.5
1
IEC10000142 V1 EN
Figure 32:
Boolean output signals for the injected current with two components:
a 50 Hz current component and a 49.5 Hz current component
Automatic switch onto fault logic ZCVPSOF
Prepare the IED for verification of settings outlined in section
verify
settings".
The automatic switch onto fault logic function ZCVPSOF is checked using secondary
injection tests together with the Scheme communication logic for distance or
overcurrent protection function and with the dead line detection function (DLD),
which is embedded in ZCVPSOF. ZCVPSOF is activated either by the external input
BC, or by the internal DLD. FUFSPVC is done with a pre-fault condition where the
phase voltages and currents are at zero. A reverse three-phase fault with zero
impedance and a three-phase fault with an impedance corresponding to the whole line
is applied. This fault shall cause an instantaneous trip and result in a TRIP indication.
Activating ZCVPSOF externally
1.
Activate the switch onto fault BC input.
COMMON TRIP COMMAND (trip)
TRIPZ1 (tripZone1)
TRIPZ2 (tripZone2)
START (start)
GENMODE (generatorMode)
MOTMODE (motorMode)
1.5
2
2.5
3
time in seconds
→
1MRK 506 355-UEN A
3.5
4
4.5
IEC10000142-1-en.vsd
"Preparing the IED to
Line distance protection REL670 2.1 IEC
Commissioning manual
5
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