ABB RET670 - Automatic Switch Onto Fault Logic ZCVPSOF; Activating ZCVPSOF Externally

IEC10000142-1-en.vsd
0
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COMMON TRIP COMMAND (trip)
-1
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TRIPZ1 (tripZone1)
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TRIPZ2 (tripZone2)
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START (start)
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GENMODE (generatorMode)
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time in seconds
→
MOTMODE (motorMode)
IEC10000142 V1 EN
Figure 41: Boolean output signals for the injected current with two components: a 50
Hz current component and a 49.5 Hz current component
11.4.13 Automatic switch onto fault logic ZCVPSOF
Prepare the IED for verification of settings outlined in Section
"Preparing the IED to
verify settings".
The automatic switch onto fault logic function ZCVPSOF is checked using secondary
injection tests. 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 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.
11.4.13.1 Activating ZCVPSOF externally
Section 11 1MRK 504 165-UUS -
Testing functionality by secondary injection
170 Transformer protection RET670 2.2 ANSI
Commissioning manual