General Aspects Of Harmonics Emission - GE AF-650 GP Design And Installation Manual
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Installation Consideration
•
EN 61000-4-5 (IEC 61000-4-5): Surge transients:
Simulation of transients brought about, e.g., by
lightning that strikes near installations.
•
EN 61000-4-6 (IEC 61000-4-6): RF Common mode:
Simulation of the effect from radio-transmission
equipment joined by connection cables.
Voltage range: 200–240 V, 380–480 V
Basic standard
Acceptance criterion
Line
Motor
Brake
Load sharing
Control wires
Standard bus
7
7
Relay wires
Application and network
options
Keypad cable
External 24 V DC
Enclosure
AD: Air Discharge
CD: Contact Discharge
CM: Common mode
DM: Differential mode
1. Injection on cable shield.
Table 7.4 EMC Immunity Form
7.3 General Aspects of Harmonics Emission
An adjustable frequency drive takes up a non-sinusoidal
current from the line power, which increases the input
current I
. A non-sinusoidal current is transformed by
RMS
means of a Fourier analysis and split up into sine-wave
currents with different frequencies, i.e. different harmonic
currents I
with 50 Hz as the basic frequency:
N
Harmonic currents
Hz
Table 7.5
7-4
TM
AF-650 GP
Electrical
Surge
interference
IEC 61000-4-5
IEC 61000-4-4
B
B
2 kV/2 Ω DM
4 kV CM
4 kV/12 Ω CM
4 kV CM
4 kV/2 Ω
4 kV CM
4 kV/2 Ω
4 kV CM
4 kV/2 Ω
2 kV CM
2 kV/2 Ω
2 kV CM
2 kV/2 Ω
2 kV CM
2 kV/2 Ω
2 kV CM
2 kV/2 Ω
2 kV CM
2 kV/2 Ω
0.5 kV/2 Ω DM
2 kV CM
1 kV/12 Ω CM
—
—
I
I
I
1
5
7
50 Hz
250 Hz
350 Hz
Design and Installation Guide
See Table 7.4.
ESD
Radiated electromagnetic
IEC
61000-4-2
IEC 61000-4-3
B
—
1)
—
1)
—
1)
—
1)
—
1)
—
1)
—
1)
—
1)
—
—
8 kV AD
6 kV CD
The harmonics do not affect the power consumption
directly but increase the heat losses in the installation
(transformer, cables). Consequently, in plants with a high
percentage of rectifier load, maintain harmonic currents at
a low level to prevent an overload of the transformer and
high temperature in the cables.
Figure 7.2
DET-767A
RF common
field
mode voltage
IEC 61000-4-6
A
A
—
10 V
RMS
—
10 V
RMS
—
10 V
RMS
—
10 V
RMS
10 V
—
RMS
—
10 V
RMS
—
10 V
RMS
—
10 V
RMS
—
10 V
RMS
—
10 V
RMS
10 V/m
—
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