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2.8 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 following EMC immunity form.
Voltage range: 200-240 V, 380-480 V
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
4 kV CM
2 kV/2
Ω
DM
4 kV/12
Ω
CM
—
—
10 V
RMS
Motor
4 kV CM
4 kV/2
Ω
1)
—
—
10 V
RMS
Brake
4 kV CM
4 kV/2
Ω
1)
—
—
10 V
RMS
Load sharing
4 kV CM
4 kV/2
Ω
1)
—
—
10 V
RMS
Control wires
2 kV CM
2 kV/2
Ω
1)
—
—
10 V
RMS
Standard bus
2 kV CM
2 kV/2
Ω
1)
—
—
10 V
RMS
Relay wires
2 kV CM
2 kV/2
Ω
1)
—
—
10 V
RMS
Application and Fieldbus op-
tions
2 kV CM
2 kV/2
Ω
1)
—
—
10 V
RMS
LCP cable
2 kV CM
2 kV/2
Ω
1)
—
—
10 V
RMS
External 24 V DC
2 kV CM
0.5 kV/2
Ω
DM
1 kV/12
Ω
CM
—
—
10 V
RMS
Enclosure
—
—
8 kV AD
6 kV CD
10 V/m
—
AD: Air Discharge
CD: Contact Discharge
CM: Common mode
DM: Differential mode
1. Injection on cable shield.
Table 2.2: Immunity
2 Introduction to VLT Automation VT Drive
Automation VT Drive FC322 Design Guide
38
MG.20.X1.22 - VLT
®
is a registered Danfoss trademark
2
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