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3.5.4 Immunity Requirements
The immunity requirements for frequency converters depend on the environment where they are installed. The
requirements for the industrial environment are higher than the requirements for the home and office environment. All
Danfoss frequency converters comply with the requirements for the industrial environment and consequently comply also
with the lower requirements for home and office environment with a large safety margin.
In order to document immunity against electrical interference from electrical phenomena, the following immunity tests have
been made on a system consisting of a frequency converter (with options if relevant), a screened control cable and a
control box with potentiometer, motor cable and motor.
The tests were performed in accordance with the following basic standards:
•
EN 61000-4-2 (IEC 61000-4-2): Electrostatic discharges (ESD): Simulation of electrostatic discharges from human
beings.
•
EN 61000-4-3 (IEC 61000-4-3): Incoming electromagnetic field radiation, amplitude modulated simulation of the
effects of radar and radio communication equipment as well as mobile communications equipment.
•
EN 61000-4-4 (IEC 61000-4-4): Burst transients: Simulation of interference brought about by switching a contactor,
relay or similar devices.
•
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.
See
.
Voltage range: 200-240V, 380-480V
Basic standard
Burst
IEC 61000-4-4
Surge
IEC 61000-4-5
ESD
IEC
61000-4-2
Radiated electromagnetic
field
IEC 61000-4-3
RF common
mode voltage
IEC 61000-4-6
Acceptance criterion
B
B
B
A
A
Line
4kV CM
2kV/2
Ω
DM
4kV/12
Ω
CM
—
—
10V
RMS
Motor
4kV CM
4kV/2
Ω
1)
—
—
10V
RMS
Brake
4kV CM
4kV/2
Ω
1)
—
—
10V
RMS
Load sharing
4kV CM
4kV/2
Ω
1)
—
—
10V
RMS
Control wires
2kV CM
2kV/2
Ω
1)
—
—
10V
RMS
Standard bus
2kV CM
2kV/2
Ω
1)
—
—
10V
RMS
Relay wires
2kV CM
2kV/2
Ω
1)
—
—
10V
RMS
Application and Fieldbus
options
2kV CM
2kV/2
Ω
1)
—
—
10V
RMS
LCP cable
2kV CM
2kV/2
Ω
1)
—
—
10V
RMS
External 24V DC
2V CM
0.5kV/2
Ω
DM
1 kV/12 Ω CM
—
—
10V
RMS
Enclosure
—
—
8kV AD
6 kV CD
10V/m
—
Table 3.7 EMC Immunity Form
1) Injection on cable shield
AD: Air Discharge
CD: Contact Discharge
CM: Common mode
DM: Differential mode
Introduction to FC 300
FC 300 Design Guide
40
MG.33.BD.02 - VLT
®
is a registered Danfoss trademark
3
3
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