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8.3
Electro-Magnetic Compatibility (EMC)
All manufacturers / assemblers of electrical apparatus which performs a complete intrinsic function which is
placed on the market as a single unit intended for the end user must comply with the EMC directive
EEC/89/336 after January 1996. There are three routes by which the manufacturer/assembler can
demonstrate compliance:
1.
Self-Certification
This is a manufacturer's declaration that the European standards applicable to the electrical
environment for which the apparatus is intended have been met. Only standards that have been
officially published in the Official Journal of the European Community can be cited in the
manufacturer's declaration.
2.
Technical Construction File
A technical construction file can be prepared for the apparatus describing its EMC characteristics. This
file must be approved by a 'Competent Body' appointed by the appropriate European government
organisation. This approach allows the use of standards which are still in preparation.
3.
EC Type-Examination Certificate
This approach is only applicable to radio communication transmitting apparatus.
The MICROMASTER units do not have an intrinsic function until connected with other components (e.g. a
motor). Therefore, the basic units are not allowed to be CE marked for compliance with the EMC directive.
However, full details are provided below of the EMC performance characteristics of the products when they are
installed in accordance with the wiring recommendations in section 1.2
Three classes of EMC performance are available as detailed below. Note that these levels of performance are only
achieved when using the default switching frequency (or less) and a maximum motor cable length of 25 m.
Class 1: General Industrial
Compliance with the EMC Product Standard for Power Drive Systems EN 68100-3 for use in Second
Environment (Industrial) and Restricted Distribution.
EMC Phenomenon
Emissions:
Radiated Emissions
Conducted Emissions
Immunity:
Electrostatic Discharge
Burst Interference
Radio Frequency Electromagnetic Field
G85139-H1750-U049-C1
19/08/99
8. SUPPLEMENTARY INFORMATION
Standard
EN 55011
EN 68100-3
EN 61000-4-2
EN 61000-4-4
IEC 1000-4-3
44
Level
Level A1 *
*
8 kV air discharge
2 kV power cables, 1 kV control
26-1000 MHz, 10 V/m
* Limits not required inside a plant
where no other consumers are
connected to the same electricity
supply transformer.
© Siemens plc 1999
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