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3.2.3. Radio interference suppression
According to § 13 and § 14 of the legislation of the European
Community relating to the electromagnetic compatibility of devices
(EMVG v. 09.11.92) the national standards and regulations are only
interim standards vilid until December 31, 1995. In addition, the
harmonized European standards can be fulfilled following the
recommendations below. Measures against radio interference
suppression depend on the site of the device to be installed:
Previous national standards
The application without radio interference suppression in electrical
systems within connected working areas or industrial premises can
only be allowed if, outside the industrial premises, the limit values
according to VDE 0871/6.78, class B are not exceeded (General
allowance according to the standard on the operation of high-
frequency devices of December 14, 1984, official no. 1045/1046).
For operation within residential areas or when exceeding the limit
value class B outside of industrial premises, radio interference
suppression according to VDE 0871, limit value class B is required.
Future hormonized standards
The standard prEN 50081-2 is valid for the radio interference
suppression.
It refers to standard EN 55011 (VDE 0875, part 11, limit value class
A and B).
•
Within industrial premises, which are not connected to the public
low-voltage supply, the limit values to EN 55011, limit value
class A apply.
•
Within residential areas or industrial premises, which are
connected to the plublic low-voltage supply, the limit values to
EN 55011, limit value class B apply.
Radio interference suppression to EN 55011, limit value class
A or B, can be achieved by:
•
Using a suitable mains filter and screening of motor cables,
brake resistor cables and the power cable between mains filter
and inverter (for recommended mains filters see "Accessories").