KMB NOVAR-1007 - Branch

Novar 1xxx KMB systems
12
Table 1.3: List of Measurement Quantities – A Branch
abbreviation
symbol quantity unit
Iact
ACt
ACtACt
ACt
Instantaneous active current fundamental harmonic component
(active).
A / kA *
Irea
reA
reAreA
reA
Instantaneous reactive current fundamental harmonic component
(reactive); L indicates inductive, C indicates capacitive polarity.
A / kA *
dIrea
dreA
dreAdreA
dreA
Instantaneous reactive current fundamental harmonic component
difference to achieve the target power factor in the power system
(Delta reactive).
A / kA *
THDI
tHd
tHdtHd
tHd
Instantaneous level of power system current’s total harmonic
distortion (Total Harmonic Distortion) – shows the ratio of current
higher harmonic components content, up to the 19
th
harmonic, to the
level of fundamental harmonic. It is only evaluated if the total power
system load is at least 5% of the nominal load in terms of current
determined by the metering current transformer conversion primary
side value (parameter 12).
%
3. ÷ 19.har
H-3
H-3H-3
H-3
÷19
1919
19
Instantaneous current harmonic component level in the power
system.
%
maxTHDI
MtHd
MtHdMtHd
MtHd
Maximum THDI value achieved since last clear. The evaluation is
based on THDI one-minute moving averages.
%
* … in A as default; flashing decimal point indicates value in kA
1.9.1.2.3 V Branch
This branch shows all the quantities related to voltage. They are commonly used quantities. Only the
Capacitor Harmonic Load, CHL, factor needs further explanation – details to be found in chapter 4.9
further below.
The maximum values can be cleared manually. Clearing any of these values clears all the other
maximum values within this branch.
Table 1.4: List of Measurement Quantities – V Branch
abbreviation
symbol quantity unit
F
F
FF
F
Instantaneous voltage fundamental harmonic component
frequency.
Hz
CHL
CHL
CHLCHL
CHL
Instantaneous value of Capacitor Harmonic Load factor (Capacitor
Harmonic Load).
%
THDU
tHd
tHdtHd
tHd
Instantaneous level of power system voltage’s total harmonic
distortion (Total Harmonic Distortion) – shows the ratio of current
higher harmonic components content, up to the 19
th
harmonic, to
the level of fundamental harmonic.
%
3. ÷
19.har
H-3
H-3H-3
H-3
÷19
1919
19
Instantaneous level of harmonic component voltage in the power
system.
%
maxCHL
MCHL
MCHLMCHL
MCHL
Maximum CHL value achieved since last clear. The evaluation is
based on CHL one-minute moving averages.
%
maxTHDU
MtHd
MtHdMtHd
MtHd
Maximum THDU value achieved since last clear. The evaluation is
based on THDU one-minute moving averages.
%
3. ÷ 19.
maxharI
MH-3
MH-3MH-3
MH-3
÷19
1919
19
Maximum value of voltage harmonic component achieved since
last clear. The evaluation is based on harmonic component one-
minute moving averages.
%