ABB RELION SMU615 Technical Manual page 189

1MRS758407 C
Figure 122: Complex power and power quadrants
Table 206: Power quadrants
Quadrant
Q1
Q2
Q3
Q4
The active power P direction can be selected between forward and reverse
with
be selected with
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
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
resets the accumulated energy values to the initial values, that is, EA_FWD_ACM
Forward Wh Initial , EA_RV_ACM to Reverse Wh Initial , ER_FWD_ACM to Forward
to
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
SMU615
Technical Manual
Current
Lagging
Lagging
Leading
Leading
Active power Dir and correspondingly the reactive power Q direction can
Reactive power Dir . This affects also the accumulated energy
Chapter 9.3 Calculated measurements
P Q
+ +
- +
- -
+ -
in this manual.
Measurement functions
PF Power
0...+1.00 +ind
0...-1.00 -cap
0...-1.00 -ind
0...+1.00 +cap
Energy
Energy unit Mult setting
189