Danfoss VLT FC 360, Design Manual, Page: 36 / 82

2.6.3 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.
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 Table 2.12 .
Voltage range: 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
LCP cable
2 kV CM 2 kV/2
Ω
1) — — 10 V
RMS
Enclosure
— —
8 kV AD
6 kV CD
10 V/m —
Table 2.12 EMC Immunity Form
1) Injection on cable shield
AD: Air Discharge
CD: Contact Discharge
CM: Common mode
DM: Differential mode
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