ADVISORY COMMITTEE ON ELECTROMAGNETIC COMPATIBILITY

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ADVISORY COMMITTEE ON ELECTROMAGNETIC
COMPATIBILITY (ACEC)
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The IEC Advisory Committee on EMC (ACEC) and
Introduction to EmissionsCape Town ACEC EMC
Workshop18 October 2005

• Dr. William A. Radasky
• Chairman ACEC

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Outline

• Role of ACEC
• Membership
• IEC Guide 107
• Definition of Types of EMC Publications
• Recent ACEC Initiatives
• Other ACEC Accomplishments
• EMC Emissions Workshop Introduction

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Role of ACEC

• Provides advice to the Standardization Management
  Board (SMB)
• Coordinates the EMC work of IEC committees
• Coordinates the EMC work of the IEC with other
  organizations (e.g. ITU, ISO, OIML, etc.)
• Identifies market needs in EMC
• Publicizes the EMC work in the IEC

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ACEC Membership

• Representatives of TC 77 (4) and CISPR (4)
• TC 77 -- Moehr, Baumier, Delaballe, Ianoz
• CISPR -- Kerry, Heirman, Wright, Verholt
• Additional EMC Experts (4)
• Cheng, Canada
• Fisher, UK
• Gehrmann, Germany
• Tokuda, Japan
• Representatives of product committees which deal
  substantially with EMC matters (variable number)
• Representatives of ITU, ISO, OIML and others

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IEC Guide 107

• Title Electromagnetic compatibility -- Guide to
  the drafting of electromagnetic compatibility
  publications, 2nd edition, 1998-01
• Guide was written by ACEC and approved by the NCs
• Now available at no cost to IEC participants -
  EMC Zone
• Describes
• EMC definitions
• Basic EMC principles
• Types of EMC publications
• Organization of EMC work in the IEC
• How to develop and use EMC standards

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EMC Terminology

• Terms
• EMC ElectroMagnetic Compatibility
• HF High Frequency f gt 9 kHz
• LF Low Frequency f 9 kHz
• Source to victim approach
• Source Emission
• EM environment (both natural and man made)
• Propagation and coupling
• Victim Immunity (susceptibility is lack of
  immunity)

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EMC Emission Limits

• Special category of EMC standards
• Emphasis for this workshop
• Intention is to control sources of EM emission to
  establish an acceptable EMC compatibility level
• CISPR f gt 9 kHz
• SC 77A f 9 kHz
• Product committees should reference published
  limits
• Product committees should not set their own
  emission limits
• If published limits are not suitable for product
  committees, assistance from CISPR or SC 77A
  should be requested

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Basic EMC Publications

• Give general and fundamental conditions or rules
  for the achievement of EMC -- to be used by
  product committees
• Provide general information about
• Terminology
• Descriptions and classification of the EM
  environment
• Measurement methods and test techniques
• May be standards or technical reports
• Are not dedicated to specific products or
  families
• Do not include prescribed limits (for immunity)
  or specific performance requirements

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Generic EMC Standards

• Apply to products operating in a particular
  environment for which no dedicated EMC product
  standards exist
• Provide requirements for emissions and/or
  immunity
• Reference basic test methods
• Product committees are encouraged to apply these
  generic standards where relevant

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Product Family EMC Standards

• A product family for EMC covers a group of
  similar products
• EMC requirements and test procedures are
  specified
• Basic EMC test methods are applied
• More precise test performance criteria are
  indicated
• May be a separate document or a dedicated clause
  in a comprehensive product family standard
• ACEC should be notified as work begins
• EMC box should be marked on circulated documents

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Product EMC Standards

• Used for a particular type of product with
  specific conditions to be considered
• Same rules apply as for product family EMC
  standards
• ACEC should be notified as work begins so that
  progress can be monitored
• EMC box should be marked on circulated documents

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Recent ACEC Initiatives

• Development of Short guide to IEC Guide 107
• Summarizes key aspects of IEC Guide 107
• Developed by ACEC members and produced by the
  Central Office
• Copies are available at this meeting
• IEC Guide 107 is available at no cost to IEC
  participants by downloading - EMC Zone
• It is hoped that more uniform EMC standards will
  result from better knowledge of the guide
• Development of an EMC product standard review
  procedure

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ACEC Product Standard Review Procedure

• Some EMC product standards in the past have been
  found to diverge from the guidance of IEC Guide
  107
• Problems were often found at late stages
• A new procedure is active under the initiative of
  ACEC and approved by the SMB to review EMC
  product standards at an early stage of
  development
• Document scanning methods are being employed to
  find standards with unchecked EMC boxes which
  deal with EMC
• Comments are sent to product committees for their
  consideration

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ACEC EMC Workshops

• ACEC has been working to improve communications
  within the IEC concerning Electromagnetic
  Compatibility (EMC)
• EMC workshops have been held at five consecutive
  IEC General Meetings
• Stockholm (2000), Firenzi (2001), Beijing (2002),
  Montreal (2003), Seoul (2004)
• Industry workshops are also being organized by
  ACEC
• Cuba, China and Iran in 2002
• Brazil and Argentina in 2003
• Japan and Malaysia in 2004
• Vietnam in 2005
• Contact ACEC to schedule future workshops

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What is the IEC EMC Zone?

• An online resource for experts, non-experts and
  the public
• Initiative launched at IEC GM in Stockholm 2000
  by ACEC
• Building on previous material available to
  explain EMC to expert and non-expert audiences
• Zone was born in June 2002
• Will be discussed in more detail later in this
  workshop
• www.iec.ch/zone/emc/

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Conclusions

• The role and composition of ACEC has been
  described
• The importance of IEC Guide 107 and the
  availability of the short guide has been
  mentioned
• The descriptions of the different types of EMC
  standards have been provided
• The product EMC standard review process has been
  introduced
• Other recent ACEC activities have been described

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Schedule of Presentations
ACEC Emissions Intro William Radasky 1700 -
1715 Chairman ACEC SC 77A Emission Stds Natalie
Baumier-Duphil 1715 - 1745 Secretary SC
77A CISPR Emission Stds Peter Kerry 1745 -
1800 President CISPR Generic Emission
Stds Bernard Després 1800 - 1815 Chairman
CISPR/H Emission Stds for ITE Martin
Wright 1815 - 1830 Chairman CISPR/I EMC
Zone Rémy Baillif 1830 - 1840 IEC Technical
Officer Questions All 1840 - 1900
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Thank you for your attention