Installation and Connection
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3.3 INSTALLATION ACCORDING TO THE EUROPEAN DIRECTIVE OF
ELECTROMAGNETIC COMPATIBILITY
The inverters with the option FA (CFW11XXXXXXOFA) are equipped with an internal RFI filter to reduce
the electromagnetic interference. These inverters, when properly installed, meet the requirements of the
electromagnetic compatibility directive - “EMC Directive 89/336/EEC” – with the complement 93/68/EEC.
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/A 14 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 earth”), because
these type of networks damage the filter capacitors of the inverter.
3.3.1 Conformal Installation
For the conformal installation use:
1. Inverters with internal RFI filters option CFW11XXXXXXOFA (with grounding screws of the internal RFI filter
capacitors).
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 PCSx-01 kit supplied with the frame size A, B and
C inverters. For the frame sizes D models, use the clamps supplied with the product. Make sure there is
a good contact between the cable shield and the clamps. Refer to the figure 3.14 as an example. The
required cable separation is presented in table 3.4. For further information, please refer to item 3.2.3.
Maximum motor cable length and conduced and radiated emission levels according to the table 3.8.
If a lower emission level and/or a longer motor cable were 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 3.8.
b) As a second option only for the V/f and V V W control modes when using a sinusoidal output filter:
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 3.9. In that table the maximum cable length and
the emission levels for each configuration are also presented. Keep the separation from the other cables
according to the table 3.4. Refer to the section 3.2.3 for more information.
3. 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.
