W
HAT
I
S
IEC61000-3? IEC61000-3
S
OFTWARE FOR
W
INDOWS
U
SER
M
ANUAL
Page 16
VPN 98-025/7
Voltech Instruments
2.4.
L
IMITS
The IEC1000-3-2 standard gives tables for each of the four Classes for the
maximum permissible harmonic currents for harmonic tests. (These limits
are essentially the same for both the 1995 and 2001 versions of the
standard. See the help system for 2001 edition Class C differences. The
differences in the two versions of the standard are mainly in the way that
the harmonic results are manipulated and compared to these limits).
Maximum Permitted Harmonic Current
Harmonic
(n)
Class A
(Amps)
Class B
(Amps)
Class C
(% of Fund)
Class D
(mA/W)
Odd Harmonics
3
2.30
3.45
30 x
λ
3.4
5
1.14
1.71
10
1.9
7
0.77
1.155
7
1.0
9
0.40
0.60
5
0.5
11
0.33
0.495
3
0.35
13
0.21
0.315
3
3.85/13
15
≤
n
≤
39
0.15 x 15/n
0.225 x 15/n
3
3.85/n
Even Harmonics
2
1.08
1.62
2
-
4
0.43
0.645
-
-
6
0.30
0.45
-
-
8
≤
n
≤
40
0.23 x 8/n
0.345 x 8/n
-
-
Notes: 1) For Class A and B, the limits are specified as a number of
Amps.
2) For Class C the limits refer to a percentage of the fundamental.
λ
= the power factor.
Summary of Contents for PM3000ACE
Page 4: ......
