Automatic Switch Onto Fault Logic Zcvpsof - ABB RET670 Commissioning Manual

Section 10
Testing functionality by secondary injection
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IEC10000142 V1 EN-US
Figure 32: Boolean output signals for the injected current with two components: a 50 Hz
10.4.13

Automatic switch onto fault logic ZCVPSOF

Prepare the IED for verification of settings as outlined in section
section "Preparing for test"
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.
10.4.13.1 Activating ZCVPSOF externally
1. Activate the switch onto fault BC input.
During normal operating conditions, the BC input is de-energized.
2. Set
3. Apply a three-phase fault condition corresponding to a fault at approximately 45% of the line
or with impedance at 50% of the used zone setting and current greater than 30% of
132
COMMON TRIP COMMAND (trip)
GENMODE (generatorMode)
MOTMODE (motorMode)
0.5 1 1.5
time in seconds
current component and a 49.5 Hz current component
in this chapter.
AutoInitMode to DLD disabled and Mode to Impedance .
TRIPZ1 (tripZone1)
TRIPZ2 (tripZone2)
START (start)
2 2.5 3 3.5
→
1MRK 504 154-UUS B
4 4.5 5
IEC10000142-1-en.vsd
"Requirements" and
Commissioning manual
M13850-2 v8
M13850-14 v7
IBase .