Figure 500: Complex power and power quadrants
Table 891: Power quadrants
Quadrant Current P Q PF Power
Q1 Lagging + + 0…+1.00 +ind
Q2 Lagging - + 0…-1.00 -cap
Q3 Leading - - 0…-1.00 -ind
Q4 Leading + - 0…+1.00 +cap
The active power P direction can be selected between forward and reverse
with
Active power Dir
and correspondingly the reactive power Q direction can
be selected with
Reactive power Dir
. This affects also the accumulated energy
directions.
The accumulated energy is calculated separately as forward active ( EA_FWD_ACM),
reverse active ( EA_RV_ACM), forward reactive ( ER_FWD_ACM) and reverse reactive
( ER_RV_ACM). Depending on the value of the unit multiplier selected with
Energy
unit Mult
, the calculated power values are presented in units of kWh/kVArh or in
units of MWh/MVArh.
When the energy counter reaches its defined maximum value, the counter value is
reset and restarted from zero. Changing the value of the
Energy unit Mult
setting
resets the accumulated energy values to the initial values, that is, EA_FWD_ACM
to
Forward Wh Initial
, EA_RV_ACM to
Reverse Wh Initial
, ER_FWD_ACM to
Forward
VArh Initial
and ER_RV_ACM to
Reverse VArh Initial
. It is also possible to reset the
accumulated energy to initial values through a parameter or with the RSTACM input.
Sequence components
The phase-sequence components are calculated using the phase currents and
phase voltages. More information on calculating the phase-sequence components
can be found in
Chapter 11.6 Calculated measurements
in this manual.
1MRS757644 H
Measurement functions
620 series
Technical Manual
933
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