Operation Principle - ABB RES670 Technical Manual

Section 11
Multipurpose protection
11.1.6
11.1.6.1
336
Name Type
ICOSFI REAL
VOLTAGE REAL
VIANGLE REAL

Operation principle

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 189.
Table 189: Current selection for CVGAPC function
Set value for the
parameter
CurrentInput
1 PhaseA
2 PhaseB
3 PhaseC
4 PosSeq
5 NegSeq
6 3ZeroSeq
7 MaxPh
8 MinPh
9 UnbalancePh
10 PhaseA-PhaseB
Table continues on next page
Values (Range) Unit
-
-
-
Comment
CVGAPC function will measure the phase A current phasor
CVGAPC function will measure the phase B current phasor
CVGAPC function will measure the phase C current phasor
CVGAPC function will measure internally calculated positive sequence
current phasor
CVGAPC function will measure internally calculated negative sequence
current phasor
CVGAPC function will measure internally calculated zero sequence current
phasor multiplied by factor 3
CVGAPC function will measure current phasor of the phase with maximum
magnitude
CVGAPC function will measure current phasor of the phase with minimum
magnitude
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
CVGAPC function will measure the current phasor internally calculated as
the vector difference between the phase A current phasor and phase B
current phasor (I -I )
A B
1MRK 511 408-UUS A
Description
A Measured current multiplied
with cos (Phi)
kV Measured voltage value
deg Angle between voltage and
current
Phasor measurement unit RES670 2.2 ANSI
Technical manual
M13751-3 v3