ABB REB670 Series, Руководство по применению

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• Definite time delay for both steps
3. Two overvoltage steps with the following built-in features
•
Definite time delay or Inverse Time Overcurrent TOC/IDMT delay for both steps
4. Two undervoltage steps with the following built-in features
• Definite time delay or Inverse Time Overcurrent TOC/IDMT delay for both steps
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 38 and table 39 ). It is possible to simultaneously use all four protection
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.
10.1.2.1 Current and voltage selection for CVGAPC function
SEMOD53443-6 v4
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
CurrentInput, to measure one of
the current quantities shown in table 38 .
Table 38: Available selection for current quantity within CVGAPC function
Set value for 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 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
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 (IL1-IL2)
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 (IL2-IL3)
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 ( IL3-IL1)
Table continues on next page
Section 10 1MRK 505 370-UEN D
Multipurpose protection
226 Busbar protection REB670
Application manual