Current And Voltage Selection For Cvgapc Function - ABB RELION 670 Series Applications Manual

Section 11
Multipurpose protection
•
3. Two overvoltage steps with the following built-in features
•
4. Two undervoltage steps with the following built-in features
•
All these four protection elements within one general protection function works independently
from each other and they can be individually enabled or disabled. However it shall be once
more noted that all these four protection elements measure one selected current quantity and
one selected voltage quantity (see table
all four-protection elements and their individual stages. Sometimes in order to obtain desired
application functionality it is necessary to provide interaction between two or more protection
elements/stages within one CVGAPC function by appropriate IED configuration (for example,
dead machine protection for generators).
11.1.2.1

Current and voltage selection for CVGAPC function

CVGAPC function is always connected to three-phase current and three-phase voltage input in
the configuration tool, but it will always measure only the single current and the single voltage
quantity selected by the end user in the setting tool (selected current quantity and selected
voltage quantity).
The user can select, by a setting parameter
current quantities shown in table 46.
Table 46: Available selection for current quantity within CVGAPC function
Set value for parameter
"CurrentInput"
phase1
1
phase2
2
phase3
3
4 PosSeq
5 NegSeq
6 3 · ZeroSeq
7 MaxPh
8 MinPh
9 UnbalancePh
10 phase1 - phase2
phase2 - phase3
11
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490
Definite time delay for both steps
Definite time delay or Inverse Time Overcurrent TOC/IDMT delay for both steps
Definite time delay or Inverse Time Overcurrent TOC/IDMT delay for both steps
Comment
CVGAPC function will measure the phase L1 current phasor
CVGAPC function will measure the phase L2 current phasor
CVGAPC function will measure the phase L3 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 L1 current phasor and phase L2
current phasor (IL1-IL2)
CVGAPC function will measure the current phasor internally calculated as
the vector difference between the phase L2 current phasor and phase L3
current phasor (IL2-IL3)
46 and table 47). It is possible to simultaneously use
CurrentInput , to measure one of the following
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