introduction emc standards
TRANSCRIPT
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Introduction to EMCStandards
Les McCormack York EMC Services Ltd
University of York, UK
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Summary
!Why are standards important?!What are the different types of standard?
!How are standards structured?!How do I identify the appropriate standard?
!What are transition periods?
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Introduction
!Standards
− Important documents
− Used to demonstrate conformity
− Different types & different uses
− Some may contain test methods− Most will contain test limits or test levels
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Types of standard
!Basic standards
!Product specific (family) standards
!Generic standards
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Structure of new standards
!Simple documents
!Contain no test methods!Reference basic standards
ESDEN61000-4-2
RadiatedEN61000-4-3
ENV50204
EFT/B
EN61000-4-4
Surge
EN61000-4-5
Conducted RF
EN61000-4-6
Pwr freq mag field
EN61000-4-8
PQF
EN61000-4-11
EN50082-1:1997
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Basic standards
!Reference documents
− Referenced by generic and product standards
!Provide basic test methods!Emissions
− EN55022
− EN55011− EN55014
− EN61000-3-2
− EN61000-3-3
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Basic standards! Immunity
− EN61000-4-2 (ESD)
− EN61000-4-3 (Radiated immunity)− EN61000-4-4 (EFT/B)
− EN61000-4-5 (Surge)
− EN61000-4-6 (Conducted RF)
− EN61000-4-8 (Power frequency magnetic)
− EN61000-4-11 (Voltage dips and interruptions)
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Product standards
!Written for specific products or product families
!Take precedence over other standards
!Emissions
− EN55011 (Industrial, scientific and medical)
− EN55013 (Broadcast receivers)− EN55014-1 (Household appliances)
− EN55015 (Lighting equipment)
− EN50199 (Welding equipment)
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Product standards
! Immunity
− EN55014-2 (Household appliances)
− EN55020 (Broadcast receivers)
− EN55024 (Information technology equipment)
− EN61547 (Lighting equipment)
!Both
− EN61326-1 (Measurement, control and lab use)
− EN50130-4 (Alarms)
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Generic standards
!Cover an environment
− Residential, commercial & light industrial
− Industrial!Used where no harmonised product standard
!Emissions
− EN50081-1 (RCLI) renumbered to EN61000-6-3
− EN50081-2 (I) renumbered to EN61000-6-4
! Immunity
− EN50082-1 (RCLI) renumbered to EN61000-6-1
− EN50082-2 (I) renumbered to EN61000-6-2
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Changes
!Generic standards renumbering
1/4/2002YesImmunity / IEN61000-6-2:1999EN50082-2:1995
1/4/2004NoImmunity /RCLI
EN61000-6-1:2001EN50082-1:1997
1/4/2004NoEmissions / IEN61000-6-4:2001EN50081-2:1993
1/4/2004NoEmissions /RCLI
EN61000-6-3:2001EN50081-1:1992
DOWChanges?TitleNew NoCurrent No
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EN50082-2:1995 V EN61000-6-2:1999
!Definitions of apparatus ports
• Process, measurement & control portsare redefined as signal ports
• Earth port is redefined as a functionalearth port
!DOW 01/04/2002
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EN50082-2:1995 V EN61000-6-
2:1999
EN61000-4-5
EN61000-4-4
EN61000-4-3
EN61000-4-2
Standard
New test. Applicable to ac power, dc power &signal ports
For signal lines:
!±1kV line – earth only
!Applicable only to cables >30m
!Where the EUT will not function because of thesurge generator CDN, the test is not required.
Surge
All signal port test levels ±1kV
Functional earth port
EFT/B
NoneRadiated
NoneESD
Summary of changesTest
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EN50082-2:1995 V EN61000-6-
2:1999
EN61000-4-11
EN61000-4-8
EN61000-4-6
Standard
New test. Applicable to ac input power portsonly
!30% reduction for 0.5 period
!60% reduction for 5 periods
!>95% reduction for 250 periods
Voltage dips&interruptions
New test
!50Hz 30A/m. Only applicable to apparatuscontaining devices susceptible to magnetic
fields
Magnetic
NoneConducted
RF
Summary of changesTest
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The Problem with Dates!
!CISPR 22:
1993 is the same as
− EN55022:1994 is the same as
− BSEN55022:1995
!CISPR 14:1993 is the same as
− EN55014:1993 is the same as
− BSEN55014-1:1997
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Transition periods
!Apply to all new and amended standards
!Period when the new standard can be used!Normally 2 or 3 years in duration
!New standard must be applied after transition
period
!Transition periods are published in the OJ
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Listing in the OJ
!Standard may be used to demonstrate
conformity via the self certification route
!Not all harmonised European standards
(ENs) are published in OJ
− EN50155 (railway apparatus)− EN50121-x series (railway environment)
− Need a TCF to justify their use
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The Consequence of Change
!Standards are!dynamic
!amended
! re-issued
!superseded
! It is important to identify!The available versions available for test
!Associated transition dates
! Is there more than one applicable standard?
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Relevant information
!Official Journal (OJEC) contains
!List of all harmonised standards under theEMC Directive
!List of amendments to those standards
!Transition dates
!http://www.yorkemc.co.uk