Harmonic Formulae - Elcontrol Microvip 3 plus User Manual

Three phase apparent power
Equivalent three phase
power factor
8.6.3

HARMONIC FORMULAE

Total Harmonic Distortion
Factor of Voltage
Total Harmonic Distortion
Factor of Current
where
Cos∅ fnd = Cosinus of the phase angle between V1 and A1
8.7 PRINTER SPECIFICATIONS
• Number of columns:
42.
• Characters:
5x7 matrix
• Print speed:
1 line per second.
• Paper:
2
55g/m pure cellulose smooth.
• Paper width:
57 mm.
• Paper length:
16 m.
• Print functions:
Manual (PRINT key on instrument's front panel prints out all measurements taken).
Automatic (printouts generated automatically at time intervals of 1 to 99 minutes as programmed on calendar-
clock). Congruity of printed measurements ensured by reference to start of printout time.
8.8 CLAMP METER SPECIFICATIONS
• Measurement range:
from 0,1 A to 1200 A.
• Frequency range:
from 30 Hz to 10 kHz.
• Ratio:
1000A/1Vrms.
• Accuracy:
200... 1000A ≤ 0,5%
200A ≤ 0,75% ≤ 0,75° phase angle
50...
50A ≤ 1,5%
10...
10A ≤ 3% + 0,1 mV
0,1...
V , A = V, I
harmonic of 50/60 Hz fundamental
k k
k = 2, 3,..., 24th harmonic computed by means of a DFT
≤ 0,5° phase angle
≤ 1,5°
phase angle
VA =
W
∑
CosΦ = W
∑ ∑
THDF V =
THDF A =
40
+
2 2
VAr
∑ ∑
/ VA
∑
24
24 ∑
2 V
∑
V
or
k
k 2
2
V
V
1
rms
24 24
2 2
∑
∑
A A
k or k
2 2
A A
rms
1
2