LEM NORMA 5000 - 10 Formulas; Direct Current; Alternating Current

Formulas
Power Analyzer NORMA 4000, NORMA 5000 65
EO1111G REV G
10 Formulas
10.1 Direct current
IUR =
IUP ⋅=
10.2 Alternating current
Typical values for 230-V AC grid (50 Hz):
U
p
= 325 V Periodic time t = 0.02 seconds
U
rms
= 230 V ( = 0.707 * Up
U
gw
= U
rm
= 207 V ( = 0.637 * Up
∫
=
T
m
udt
T
U
0
1
(pure AC sine = 0)
)²
1
(
0
∫
=
T
rms
dtu
T
U
∫
=
T
rm
dtu
T
U
0
//
1
rms
p
U
U
cf =
rm
rms
U
U
ff =
22
)1107,1(
⋅
⋅=⋅=
π
rmrmrmc
UUU
∫
⋅=
T
dtiu
T
P
0
)(
1
IUS ⋅=
²)²( PSQ −=
(+...inductive, -...capacitive)
g
S
P
⋅→= ϕλ cos
01
01
01
)(cos
H
H
H
S
P
==
ϕλ
2
rms
I
S
Z =
Resistance:
Power (P):
Arithmetic mean:
RMS value:
Rectified mean
value:
Crest factor:
Form factor:
Rectified mean
value corrected
Active power:
Apparent power:
Reactive power:
Power factor:
Apparent
impedance: