ABB Relion 670 series, Technical Manual

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Table 410: Voltage selection for CVGAPC function
Set value for the
parameter
VoltageInput
Comment
1 PhaseA CVGAPC function will measure the phase A voltage phasor
2 PhaseB CVGAPC function will measure the phase B voltage phasor
3 PhaseC CVGAPC function will measure the phase C voltage phasor
4 PosSeq CVGAPC function will measure internally calculated positive sequence voltage phasor
5 -NegSeq CVGAPC function will measure internally calculated negative sequence voltage
phasor. This voltage phasor will be intentionally rotated for 180° in order to enable
easier settings for the directional feature when used.
6 -3ZeroSeq CVGAPC function will measure internally calculated zero sequence voltage phasor
multiplied by factor 3. This voltage phasor will be intentionally rotated for 180° in
order to enable easier settings for the directional feature when used.
7 MaxPh CVGAPC function will measure voltage phasor of the phase with maximum magnitude
8 MinPh CVGAPC function will measure voltage phasor of the phase with minimum magnitude
9 UnbalancePh CVGAPC function will measure magnitude of unbalance voltage, which is internally
calculated as the algebraic magnitude difference between the voltage phasor of the
phase with maximum magnitude and voltage phasor of the phase with minimum
magnitude. Phase angle will be set to 0° all the time
10 PhaseA-PhaseB CVGAPC function will measure the voltage phasor internally calculated as the vector
difference between the phase A voltage phasor and phase B voltage phasor (V
A
-V
B
)
11 PhaseB-PhaseC CVGAPC function will measure the voltage phasor internally calculated as the vector
difference between the phase B voltage phasor and phase C voltage phasor (V
B
-V
C
)
12 PhaseC-PhaseA CVGAPC function will measure the voltage phasor internally calculated as the vector
difference between the phase C voltage phasor and phase A voltage phasor ( V
C
-V
A
)
13 MaxPh-Ph CVGAPC function will measure ph-ph voltage phasor with the maximum magnitude
14 MinPh-Ph CVGAPC function will measure ph-ph voltage phasor with the minimum magnitude
15 UnbalancePh-Ph CVGAPC function will measure magnitude of unbalance voltage, which is internally
calculated as the algebraic magnitude difference between the ph-ph voltage phasor
with maximum magnitude and ph-ph voltage phasor with minimum magnitude.
Phase angle will be set to 0° all the time
It is important to notice that the voltage selection from table 410 is always applicable regardless
the actual external VT connections. The three-phase VT inputs can be connected to IED as either
three phase-to-ground voltages V
A
, V
B
& V
C
or three phase-to-phase voltages V
AB
, V
BC
& V
CA
). This
information about actual VT connection is entered as a setting parameter for the pre-processing
block, which will then take automatic care about it.
The user can select one of the current quantities shown in table 411 for built-in current restraint
feature:
1MRK 502 066-UUS B Section 11
Multipurpose protection
699
Technical manual