janitza UMG 508, Handbook

Page: 11 / 105

UMG 508
10 UMG 508
11
General General
Mains frequency power factor
The mains frequency power factor is the power factor of the mains frequency and is calculated using the fourier analysis
(FFT). The voltage and current must not be sinusoidal. All in the device calculated reactive power are resulting of funda-
mental reactive power.
Power factor sign
• Sign Q = +1 for phi in the range 0° .. 180°
(inductive)
• Sign Q = -1 for phi in the range 180° .. 360°
(capacitive)
Reactive power for phase conductor p
• Reactive power of the mains frequency.
Q Vorzeichen Q S P
fund p p fund p fund p
= ⋅ − ( )
ϕ 2 2
Total reactive power
• Reactive power of the mains frequency.
Q Q Q Q
V
= + +
1 2 3
Distortion power factor
• The distortion power factor is the power factor of all
mains frequencies and is calculated using the fourier
analysis (FFT).
D S P Q
fund
= − − 2 2 2
• The apparent power „S” contains all fundamental harmonics and all harmonic rates up to the M-th harmonic.
• The effective power „P” contains all fundamental harmonics and all harmonic rates up to the M-th harmonic.
• M = 50 (UMG605, UMG605-PRO, UMG511, UMG512-PRO)
Reactive energy per phase
Reactive energy per phase, inductive
für Q
L1
(t) > 0
für Q
L1
(t) < 0
Reactive energy per phase, capazitive
Reactive energy, sum L1-L3
Reactive energy, sum L1-L3, inductive
für (Q
L1
(t) + Q
L2
(t) + Q
L3
(t)) > 0
Reactive energy, sum L1-L3, capazitive
für (Q
L1
(t) + Q
L2
(t) + Q
L3
(t)) < 0