ABB RELION RET670, Applications Manual

Page: 651 / 1016

The user can select, by a setting parameter CurrentInput , to measure one of the
following current quantities shown in table 49 .
Table 49: Available selection for current quantity within CVGAPC function
Set value for parameter
"CurrentInput”
Comment
1 PhaseA CVGAPC function will measure the phase A current phasor
2
PhaseB
CVGAPC function will measure the phase B current phasor
3
PhaseC
CVGAPC function will measure the phase C current phasor
4 PosSeq CVGAPC function will measure internally calculated positive
sequence current phasor
5 NegSeq CVGAPC function will measure internally calculated negative
sequence current phasor
6 3 · ZeroSeq CVGAPC function will measure internally calculated zero sequence
current phasor multiplied by factor 3
7 MaxPh CVGAPC function will measure current phasor of the phase with
maximum magnitude
8 MinPh CVGAPC function will measure current phasor of the phase with
minimum magnitude
9
UnbalancePh
CVGAPC function will measure magnitude of unbalance current,
which is internally calculated as the algebraic magnitude difference
between the current phasor of the phase with maximum magnitude
and current 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 current phasor internally
calculated as the vector difference between the phase A current
phasor and phase B current phasor (VA-VB)
11 PhaseB-PhaseC CVGAPC function will measure the current phasor internally
calculated as the vector difference between the phase B current
phasor and phase C current phasor (VB-VC)
12
PhaseC-PhaseA
CVGAPC function will measure the current phasor internally
calculated as the vector difference between the phase C current
phasor and phase A current phasor ( VC-VA)
13 MaxPh-Ph CVGAPC function will measure ph-ph current phasor with the
maximum magnitude
14 MinPh-Ph CVGAPC function will measure ph-ph current phasor with the
minimum magnitude
15 UnbalancePh-Ph CVGAPC function will measure magnitude of unbalance current,
which is internally calculated as the algebraic magnitude difference
between the ph-ph current phasor with maximum magnitude and
ph-ph current phasor with minimum magnitude. Phase angle will be
set to 0° all the time
The user can select, by a setting parameter VoltageInput , to measure one of the
following voltage quantities shown in table 50 .
1MRK 504 163-UUS A
Section 12
Multipurpose protection
Transformer protection RET670 2.2 ANSI 645
Application manual