590+ Series DC Digital Converter - ssdservice.pl

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The unit, when installed for Class A operation, will be compliant with EN55011 (1991)/
EN55022 (1994) for radiated emissions, as described below.
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The unit is installed for Class A operation when mounted inside a cubicle having 10dB
attenuation between 30 and 100MHz (typically the attenuation provided by a metal cabinet with
no aperture of dimension greater than 0.15m (0.5 feet), using the recommended ac supply filter
and having met all cabling requirements.
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The VSD, external filter and associated equipment are mounted on to a conducting, metal
mounting panel. Do not use cubicle constructions that use insulating mounting panels or
undefined mounting structures. Cables between the VSD and motor must be screened or
armoured and terminated at the VSD or locally on the back panel.
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Apply a single point series earthing strategy for a single VSD mounted in a cubicle as shown.
The protective earth connection (PE) to the motor must be run inside the screened cable between
the motor and VSD and be connected to a separate star point earth terminal near the VSD.
Cubicle
PE
External
Filter
Back Panel
Choke
VSD
U-clip used to
terminate screen
connection to
the back panel
*
Star Point Earth
Metal Work Earth
Motor
AC Supply
* As short as possible
(0.3m (1 foot) maximum)
Armoured/screened cable
Use an additional PE conductor where PE
2
is