Elcontrol Microvip 3 plus - Harmonic Formulae

40
Three phase apparent power
VA
∑
=
Equivalent three phase
Cos
Φ
∑
= W
∑
/ VA
∑
power factor
8.6.3 HARMONIC FORMULAE
Total Harmonic Distortion
THDF V =
or
Factor of Voltage
Total Harmonic Distortion
THDF A =
Factor of Current or
where
V
k
, A
k
= V, I
harmonic of 50/60 Hz fundamental
k = 2, 3,..., 24th harmonic computed by means of a DFT
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:
55g/m
2
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% ≤ 0,5° phase angle
50... 200A ≤ 0,75% ≤ 0,75° phase angle
10... 50A ≤ 1,5% ≤ 1,5° phase angle
0,1... 10A ≤ 3% + 0,1 mV
22
VArW
∑∑
+
rms
V
k
V
24
2
2
∑
rms
k
A
A
24
2
2
∑
1
V
k
V
24
2
2
∑
1
k
A
A
24
2
2
∑