ABB REG670 - Operation Principle

11.1.7 Operation principle
11.1.7.1 Measured quantities within CVGAPC
General current and voltage protection (CVGAPC) function is always connected to
three-phase current and three-phase voltage input in the configuration tool, but it will
always measure only one current and one voltage quantity selected by the end user in
the setting tool.
The user can select to measure one of the current quantities shown in table
332.
Table 332: Current selection for CVGAPC function
Set value for the
parameter
CurrentInput
Comment
1 Phase1 CVGAPC function will measure the phase L1 current phasor
2 Phase2 CVGAPC function will measure the phase L2 current phasor
3 Phase3 CVGAPC function will measure the phase L3 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 3ZeroSeq 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
Phase1-Phase2 CVGAPC function will measure the current phasor internally calculated
as the vector difference between the phase L1 current phasor and phase
L2 current phasor (I
L1
-I
L2
)
11
Phase2-Phase3 CVGAPC function will measure the current phasor internally calculated
as the vector difference between the phase L2 current phasor and phase
L3 current phasor (I
L2
-I
L3
)
12
Phase3-Phase1 CVGAPC function will measure the current phasor internally calculated
as the vector difference between the phase L3 current phasor and phase
L1 current phasor ( I
L3
-I
L1
)
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
Section 11 1MRK502052-UEN B
Multipurpose protection
576
Technical manual