Emc Installation; Emc Measures In The Control Panel - Eaton PowerXL DA1 Series Installation Manual

3.5 EMC installation

3.5.1 EMC measures in the control panel

The responsibility to comply with the legally stipulated limit values and thus
the provision of electromagnetic compatibility is the responsibility of the end
user or system operator. This operator must also take measures to minimize
or remove emission in the environment concerned. They must also utilize
means to increase the interference immunity of the devices of the system.
￫
In a power drive system (PDS) with variable frequency drives,
you should take measures for electromagnetic compatibility
(EMC) while doing your engineering, since changes or
improvements to the installation site, which are required in the
installation or while mounting, are normally associated with
additional higher costs as well.
The technology and system of a variable frequency drive cause the flow of
high frequency leakage current during operation. Because of this, all earthing
elements must be low-impedance elements connected in such a way as to
establish an electrical contact across a large surface area.
With leakage currents greater than 3.5 mA, in accordance with VDE 0160 or
EN 60335, either
• the cable cross-section of the protective conductor must be ≧ 10 mm
• the protective conductor must be open-circuit monitored, or
• a second protective conductor must be fitted.
For an EMC-compliant installation, we recommend the following measures:
• installation of the variable frequency drive in a metallic conductive
housing with a good connection to ground,
• screened motor cables (short cables).
￫
Ground all conductive components and enclosures in a drive
system with the shortest possible cable with the largest
possible diameter (Cu-braid).
In order to have an installation that meets EMC requirements, make sure to
connect all the metallic parts in the devices and in the control panel to each
other across a large area and in a way that will make it possible to conduct
high frequencies. Mounting plates and control panel doors should be
connected to the panel by means of short HF braids with an electrical contact
established across a large surface area.
￫
Do not make connections to painted surfaces (electrolytic
oxidation, yellow chromated).
￫
Install the variable frequency drive as directly as possible
(without spacers) on a metal plate (mounting plate).
DA1 Variable Frequency Drives 08/18 MN04020005Z-EN www.eaton.com
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3.5 EMC installation
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