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Installation and Connection
Note: a professional is a person or organization familiar with the installation and/or commissioning of inverters,
including their EMC aspects.
Category C3: inverters with a voltage rating less than 1000 V and intended for use in the Second Environment
only (not designed for use in the First Environment).
Category C4: inverters with a voltage rating equal to or greater than 1000 V, or with a current rating equal to
or greater than 400 Amps, or intended for use in complex systems in the Second Environment.
EN 55011: "Threshold values and measuring methods for radio interference from industrial,
scientific and medical (ISM) high-frequency equipment"
Class B: equipment intended for use in the low-voltage power supply network (residential, commercial, and
light industrial environments).
Class A1: equipment intended for use in the low-voltage power supply network. Restricted distribution.
Note: it must be installed and commissioned by a professional when applied in the low-voltage power supply
3
network.
Class A2: equipment intended for use in industrial environments.
3.5.3 Emission and Immunity Levels
EMC Phenomenon
Emission:
Mains terminal disturbance voltage
Frequency range: 150 kHz to 30 MHz).
Electromagnetic radiation disturbance
Frequency range: 30 kHz to 1 GHz).
Immunity:
Electrostatic discharge (ESD).
Fast transient-burst.
Conducted radio-frequency common mode.
Surge immunity.
Radio-frequency electromagnetic field.
3.5.4 External RFI Filters
To be used only if necessary to comply with conducted emission levels category C2 or C3 according
to IEC/EN61800-3. For the CFW-11M inverters, the connection diagram for 6 pulses configuration
presented at
configuration presented at
Refer to the CFW-11M user's manual for the external filters and more information.
3-24 | UR11
Table 3.11 - Emission and immunity levels
Figure 3.25 on page 3-25
Figure 3.26 on page 3-25
Basic Standard
IEC/EN61800-3
Without external filter: C4 category.
With external filter: C2 or C3 category.
IEC/EN61000-4-2
4 kV for contact discharge and 8 kV for air discharge.
IEC/EN61000-4-4
2 kV/5 kHz (coupling capacitor) power input cables.
1 kV/5 kHz control cables, and remote keypad cables.
2 kV/5 kHz (coupling capacitor) motor output cables.
IEC/EN61000-4-6
0.15 to 80 MHz; 10 V; 80 % AM (1 kHz).
Motor cables, control cables, and remote keypad cables.
IEC/EN61000- 4-5
1.2/50 μs, 8/20 μs.
1 kV line-to-line coupling.
2 kV line-to-ground coupling.
IEC/EN61000-4-3
80 to 1000 MHz.
10 V/m.
80 % AM (1 kHz).
should be used and the connection diagram for 12 pulses
should be used.
Level
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