Emc Measures In The Control Panel - Eaton PowerXL DB1 Installation Manual

3.4.1 EMC Measures in the Control Panel

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 con-
nected to the panel by means of short drain wires with an electrical contact
established across a large surface area.
￫
Do not make connections to painted surfaces (electrolytic oxida-
tion, yellow chromated).
￫
Route mains and motor cables in thecontrol cabinet as close to
the ground potential as possible. This is because free moving
cables act as antennas.
￫
If routed in parallel, cables carrying high frequencies
(e.g., shielded motor cables) and cables with interference sup-
pression (e.g., mains supply cable, control and signal cables)
should be installed at a distance of at least 100 mm from each
other in order to avoid electromagnetic interference. You should
also route cables separately from each other if there are large
differences in voltage. If control cables and power cables need
to cross, they should always do so at a right angle (90°).
② ①
≧ 100 mm
(≧ 3.94")
Figure 16: Cable routing
￫
Never lay control orsignal cables
cables
①
Analogue signal cables (measured values, setpoints, and correc-
tion values) must be routed inside shielded conduits.
DB1 Variable Frequency Drives 09/17 MN040031EN www.eaton.com
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3 Installation
3.4 EMC installation
in the same duct as power
②
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