ABB REC670 Applications Manual page 262

Section 11
Multipurpose protection
256
Set value for parameter
"VoltageInput"
4 PosSeq
5 -NegSeq
-3*ZeroSeq
6
MaxPh
7
MinPh
8
UnbalancePh
9
phase1 - phase2
10
11 phase2 - phase3
phase3 - phase1
12
MaxPh-Ph
13
MinPh-Ph
14
UnbalancePh-Ph
15
It is important to notice that the voltage selection from table
applicable regardless the actual external VT connections. The three-phase VT
inputs can be connected to IED as either three phase-to-earth voltages U
U or three phase-to-phase voltages U
L3
This information about actual VT connection is entered as a setting parameter for
the pre-processing block, which will then take automatically care about it.
Comment
CVGAPC function will measure internally calculated positive
sequence voltage phasor
CVGAPC function will measure internally calculated negative
sequence voltage phasor. This voltage phasor will be
intentionally rotated for 180° in order to enable easier settings
for the directional feature when used.
CVGAPC function will measure internally calculated zero
sequence voltage phasor multiplied by factor 3. This voltage
phasor will be intentionally rotated for 180° in order to enable
easier settings for the directional feature when used.
CVGAPC function will measure voltage phasor of the phase
with maximum magnitude
CVGAPC function will measure voltage phasor of the phase
with minimum magnitude
CVGAPC function will measure magnitude of unbalance
voltage, which is internally calculated as the algebraic
magnitude difference between the voltage phasor of the phase
with maximum magnitude and voltage phasor of the phase
with minimum magnitude. Phase angle will be set to 0° all the
time
CVGAPC function will measure the voltage phasor internally
calculated as the vector difference between the phase L1
voltage phasor and phase L2 voltage phasor (UL1-UL2)
CVGAPC function will measure the voltage phasor internally
calculated as the vector difference between the phase L2
voltage phasor and phase L3 voltage phasor (UL2-UL3)
CVGAPC function will measure the voltage phasor internally
calculated as the vector difference between the phase L3
voltage phasor and phase L1 voltage phasor (UL3-UL1)
CVGAPC function will measure ph-ph voltage phasor with the
maximum magnitude
CVGAPC function will measure ph-ph voltage phasor with the
minimum magnitude
CVGAPC function will measure magnitude of unbalance
voltage, which is internally calculated as the algebraic
magnitude difference between the ph-ph voltage phasor with
maximum magnitude and ph-ph voltage phasor with minimum
magnitude. Phase angle will be set to 0° all the time
, U & U
L1L2 L2L3
1MRK 511 401-UEN A
29 is always
, U
L1 L2
VAB, VBC and VCA.
L3L1
Bay control REC670 2.2 IEC
Application manual
&