ABB Relion 670 Series Technical Reference Manual page 575

1MRK505222-UUS C
Technical reference manual
Table 298: Voltage selection for CVGAPC function
Set value for the
parameter
VoltageInput
1 PhaseA
2 PhaseB
3 PhaseC
4 PosSeq
5 -NegSeq
6 -3ZeroSeq
7 MaxPh
8 MinPh
9 UnbalancePh
10 PhaseA-PhaseB
11 PhaseB-PhaseC
12 PhaseC-PhaseA
13 MaxPh-Ph
14 MinPh-Ph
15 UnbalancePh-Ph
It is important to notice that the voltage selection from table
regardless the actual external VT connections. The three-phase VT inputs can be
connected to IED as either three phase-to-ground voltages V
to-phase voltages V , V
AB
Comment
CVGAPC function will measure the phase A voltage phasor
CVGAPC function will measure the phase B voltage phasor
CVGAPC function will measure the phase C voltage phasor
CVGAPC function will measure internally calculated positive sequence
voltage phasor
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.
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.
CVGAPC function will measure voltage phasor of the phase with maximum
magnitude
CVGAPC function will measure voltage phasor of the phase with minimum
magnitude
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
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 -V )
A B
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 -V )
B C
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 -V )
C A
CVGAPC function will measure ph-ph voltage phasor with the maximum
magnitude
CVGAPC function will measure ph-ph voltage phasor with the minimum
magnitude
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
& V ). This information about actual VT connection is
BC CA
Section 10
Multipurpose protection
298 is always applicable
, V & V or three phase-
A B C
569