hager hw+ User Manual

102 6LE008146B
Measurement functions
6.13 Measurement parameters
Setting the reactive and apparent power calculation convention
This parameter is used to configure the convention for calculating total reactive power and
total apparent power.
The calculation of these two data will not lead to the same value as it depends on whether the
addition of the phase components is vectorial or arithmetic.
The following figure clearly shows the dierence in the case of total apparent power:
On the figure above, the value of total apparent power SA by arithmetic summing
is greater than the value of total apparent power SV by vector summing. The value
calculated by vector summing is more precise than the value calculated by arithmetic
summing.
Vector and arithmetic summing
S
a
P
a
Q
a
Q
b
Q
c
P
b
P
c
S
b
S
c
S
v
S
v
S
A
Symbol Definition
Pa Active power L1
Pb Active power L2
Pc Active power L3
Qa Reactive power L1
Qb Reactive power L2
Qc Reactive power L3
Sa Apparent power L1
Sb Apparent power L2
Sc Apparent power L3
SV Total apparent power: Vector summing
SA Total apparent power: Arithmetic summing
Calculation convention setting Default setting
Arithmetic – Vector Vector

hager hw+ Specifications

General

Brand	hager
Model	hw+
Category	Circuit breakers
Language	English