Introduction EMC Standards

8/7/2019 Introduction EMC Standards

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Introduction to EMCStandards

Les McCormack York EMC Services Ltd

University of York, UK



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?



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



Types of standard

!Basic standards

!Product specific (family) standards

!Generic standards



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



Basic standards

!Reference documents

− Referenced by generic and product standards

!Provide basic test methods!Emissions

− EN55022

− EN55011− EN55014

− EN61000-3-2

− EN61000-3-3



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)



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)



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)



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



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



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



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



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



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



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



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



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?



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

Introduction EMC Standards

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