ABB Relion 670 Series Applications Manual page 290

Section 12
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, note that all these
four protection elements measure one selected current quantity and one selected voltage
quantity (see table
elements and their individual stages. Sometimes, it is necessary to provide interaction
between two or more protection elements/stages within one CVGAPC function by appropriate
IED configuration to obtain desired application functionality.
12.1.2.1 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.
The user can select a current input, by a setting parameter
the current quantities shown in table 50.
Table 50: Available selection for current quantity within CVGAPC function
Set value for parameter
"CurrentInput"
1 phase1
phase2
2
phase3
3
PosSeq
4
NegSeq
5
3 · ZeroSeq
6
MaxPh
7
MinPh
8
UnbalancePh
9
phase1 - phase2
10
11 phase2 - phase3
phase3 - phase1
12
Table continues on next page
284
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
50 and table 51). It is possible to simultaneously use all four protection
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)
CVGAPC function will measure the current phasor internally calculated as
the vector difference between the phase L3 current phasor and phase L1
current phasor ( IL3-IL1)
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1MRK 511 401-UEN Rev. K
CurrentInput , to measure one of
Bay control REC670
Application manual
SEMOD53443-6 v4