CLC/TR 50484:2009
(Main)Recommendations for shielded enclosures
Recommendations for shielded enclosures
This Technical Report applies to shielded enclosures used for EMC testing which are to be validated according to the EN 50147 series of standards and the corresponding international standards. The object of this report is to give guidance to the selection of the shielding materials and components. The frequency range for this document is 10 kHz to 40 GHz.
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General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST-TP CLC/TR 50484:2009
01-september-2009
1DGRPHãþD
SIST CLC/R 210-005:2000
3ULSRURþLOD]D]DVORQMHQHSURVWRUH
Recommendations for shielded enclosures
Ta slovenski standard je istoveten z: CLC/TR 50484:2009
ICS:
17.220.01 Elektrika. Magnetizem. Electricity. Magnetism.
Splošni vidiki General aspects
31.240 Mehanske konstrukcije za Mechanical structures for
elektronsko opremo electronic equipment
SIST-TP CLC/TR 50484:2009 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST-TP CLC/TR 50484:2009
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SIST-TP CLC/TR 50484:2009
TECHNICAL REPORT
CLC/TR 50484
RAPPORT TECHNIQUE
April 2009
TECHNISCHER BERICHT
ICS 17.220.01; 31.240 Supersedes R210-005:1999
English version
Recommendations for shielded enclosures
This Technical Report was approved by CENELEC on 2009-03-20.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: avenue Marnix 17, B - 1000 Brussels
© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. CLC/TR 50484:2009 E
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SIST-TP CLC/TR 50484:2009
CLC/TR 50484:2009 – 2 –
Foreword
This Technical Report was prepared by the Technical Committee CENELEC TC 210, Electromagnetic
compatibility (EMC).
The text of the draft was submitted to vote in accordance with the Internal Regulations, Part 2,
Subclause 11.4.3.2 (simple majority) and was approved by CENELEC as CLC/TR 50484 on
2009-03-20.
This document supersedes R210-005:1999.
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SIST-TP CLC/TR 50484:2009
– 3 – CLC/TR 50484:2009
Contents
1 Scope .4
2 Normative references .4
3 Definitions .4
4 General .4
5 Shielding .5
5.1 Shielding attenuation.6
5.2 Evaluation of shielding effectiveness . 10
5.3 Shielding components and selection of materials . 11
5.4 Shielding attenuation values (see Figure 8 measured according to EN 50147-1) . 14
Bibliography . 16
Figures
Figure 1 – Illustrated set-up for shielding .4
Figure 2 – Wave impedance versus distance of the field source .5
Figure 3 – Schematic diagram of the partial reflections (subscript R) and transmissions
(subscript T) at the two surfaces of a shield .6
Figure 4 – S results calculated for a low-impedance magnetic field source .9
Figure 5 – Calculated S results for a low-impedance magnetic field source .9
Figure 6 – Shielding attenuation measurement. 11
Figure 7 – Examples of door contacts . 13
Figure 8 – Shows typical performance values. 14
Table
Table 1 – Summary SE aspects .
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