Installation According To The European Directive Of Electromagnetic Compatibility; Conformal Installation - WEG CFW-11 User Manual

3.3 INSTALLATION ACCORDING TO THE EUROPEAN DIRECTIVE OF
ELECTROMAGNETIC COMPATIBILITY
The frame size E CFW-11 inverters have an internal RFI filter for the reduction of the electromagnetic interference.
These inverters, when properly installed, meet the requirements of the electromagnetic compatibility directive
– ''EMC Directive 2004/108/EC''.
The CFW-11 inverter series has been designed only for industrial applications. Therefore, the emission limits of
harmonic currents defined by the standards EN 61000-3-2 and EN 61000-3-2/A14 are not applicable.
ATTENTION!
Do not use inverters with internal RFI filters in IT networks (neutral is not grounded or grounding
provided by a high ohm value resistor) or in grounded delta networks ("delta corner earthed"), because
these type of networks damage the filter capacitors of the inverter.

3.3.1 Conformal Installation

For the conformal installation use:
1. J1 cable in the position
2. a) Shielded output cables (motor cables) and connect the shield at both ends (motor and inverter) with a
low impedance connection for high frequency. Use the clamp supplied with the product. Make sure there
is a good contact between the cable shield and the clamp. Refer to the figure 3.16 as an example. The
required cable separation is presented in table 3.5. For further information, please refer to item 3.2.3.
Maximum motor cable length and conduced and radiated emission levels according to the table 3.9. If
a lower conducted emission level (category C2) is wished, then an external RFI filter must be used at the
inverter input. For more information (RFI filter commercial reference, motor cable length and emission
levels) refer to the table 3.9.
b) As a second option only for the V/f and VVW control modes when using a sinusoidal output filter:
Adjust the switching frequency in 5 or 10 kHz (P0297=2 or 3) and the parameter P0350 in 2 or 3 (not
allowing the automatic reduction of the switching frequency to 2.5 kHz). Refer to tables 8.2 to 8.5 for
output current specification for 5 kHz and 10 kHz. Output cables (motor cables) that are not shielded can
be used, provided that RFI filters are installed at the inverter input and output, as presented in the table
3.10. The maximum motor cable length and the emission levels for each configuration are also presented.
Keep the separation from the other cables according to the table 3.5. Refer to the section 3.2.3 for more
information. The filters presented in table 3.10 were defined for the operation of the inverter at 5 kHz
switching frequency and rated output current as shown in tables 8.2 and 8.3. Those filters can also be
used for 10 kHz, however they are not optimized for it. In order to optimize them for use with the inverter
at 10 kHz, refer to the tables 8.4 and 8.5.
3. Use shielded control cables, keeping them separate from the other cables as described in item 3.2.5.
4. Inverter grounding according to the instructions on item 3.2.4.
(XE1). Refer to item 3.2.3.1.1.
Installation and Connection
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