Loading ...
Loading ...
Loading ...
1760
Users Manual
3-18
Apparent power
Apparent power
S is calculated by multiplying rms values of voltage and current of the
given aggregation.
IUS ⋅=
The 3-phase apparent power sum is calculated as
321 LLLsum
SSSS ++=
Reactive power
The reactive power
tot
Q is calculated by
22
PSQ
tot
−=
tot
Q always has a positive sign.
The 3-phase total reactive power sum is calculated as
321 LtotLtotLtotsumtot
QQQQ ++=
Note
The reactive power components
h
Q and
d
Q are not calculated with these
aggregations.
Power factor
The power factor is calculated as
S
P
PF =
The sign of the power factor is an indication of the power flow direction (motor /
generator characteristic of the load).
Events and Flicker
Voltage Events as per EN 50160 or as per IEC 61000-4-30
Voltage events are detected based on half cycle rms values (as per EN 50160) or on full
cycle rms values updated every half cycle (as per IEC 61000-4-30). As a default, the
phase-neutral voltages are monitored. If the opton Events, Flicker, and Harmonics of
U12.... is activated in the “Hardware Settings” dialog in PQ Analyze, the voltage events
of the phase-to-phase voltages U12, U23, U31 are recorded.
Flicker
Flicker is measured according to the methods described by the standard IEC 61000-4-
15:2003-02 edition 1.1. As a default Flicker is calculated on the basis of the phase
voltages. For 50 Hz or 60 Hz power systems the appropriate filter coefficients are applied.
The classifier consists of 1130 logarithmic classes.
If the option Events, Flicker, and Harmonics of U12…. in the device settings is activated,
the Flicker of the phase-to-phase voltages U12, U23, U31 is recorded.
1.888.610.7664 sales@GlobalTestSupply.com
Fluke-Direct.com
Loading ...
Loading ...
Loading ...