Hello Andy, Tommy and group, Yes Andy, you are fully right, but look at the following situation:
For emisson you insist on test according to A as it's for standard industry EN 55022:1995 For immunity you need to fulfill the generic immunity standard using the distinction as meant in EN 50082-1 i.e. light industrial and residential. Class 2 is for app. connected to dedicated un-shared mains supply systems exclusively. Class 2 and Class A apparatus are not allowed in Class 1 resp. Class B environments. The otherway around is permitted. I certainly would advise my customers to fulfill class B thereby making the same distinction as in the generic standards between (heavy) industrial and residential/light industrial. Other product standards refer to the same situation f.i. EN 55103-1:1996 (which by the way still uses the distinction between 10 and 30 meters), using class B limits for all but heavy industrial, and referring to EN 50082-1 for the definition. Hope this gives some feed to the discussion ! Regards, Ing. Gert Gremmen == Ce-test, Qualified testing == Consultants in EMC, Electrical safety and Telecommunication Compliance tests for European standards and ce-marking Member of NEC/IEC voting committee for EMC. Our Web presence: http://www.cetest.nl List of current harmonized standards http://www.cetest.nl/emc-harm.htm 15 great tips for the EMC-designer http://www.cetest.nl/features01.htm -----Oorspronkelijk bericht----- Van: Andy Griffin <agrif...@emisoft.co.uk> Aan: Ing. Gert Gremmen <cet...@cetest.nl>; Tommy H. Lee <le...@khgw.info.samsung.co.kr> CC: t...@world.std.com <t...@world.std.com>; emc-p...@ieee.org <emc-p...@ieee.org> Datum: woensdag 8 april 1998 15:00 Onderwerp: Re: EN 55022 ITE Class A vs. Class B? >EN55022 is currently the relevant product family specification, hence the >generic specification have no relevnace. EN55022 clearly states that class >B is for equipment intended "primarily" for the residential/domestic >environment and class A is for all other locations. > >Hence the Germany government [or any other] can not impose class B when >EN55022 states class A ! Yes there is the problem of home office type >situation but the specification does state "primarily" intended for home use ! > >What a manufacturer must be aware of is what are the demands of his customers. > >If EN55022 changes or a different relevant specification is issued then >this situation may obviously change ! > >Regards Andy Griffin >__________________________________________________ > > EMiSoft Limited - Test and Assessment > Software Solutions > > Uk Tel +44 (0)468 188244 > Uk Fax +44 (0)1793 522214 > USA Tel/Fax +408 356 1980 > Email mailto:agrif...@emisoft.co.uk > Web http://www.emisoft.co.uk > EMC Seminars http://www.emisoft.co.uk/special/links/index.htm >__________________________________________________ > > >At 09:10 8/4/98 +0200, Ing. Gert Gremmen wrote: >>hello Tommy, >> >> >>For ITE equipment you'd better perform to Class B, in the whole of the EU. >>Class A is restricted to industrial locations only, and this is according to >>the EMC-directive very limited area. >> >>Garages, hospitals, offices and even standard light industry should be >>classified acc. to B. >> >> >>Difference between A and B is distance of testing. The limits for Class A >>are valid at a testing distance of 30 meters, where Class B requires them to >>be met at 10 meters. >> >>Regards, >> >>Ing. Gert Gremmen >>== Ce-test, Qualified testing == >>Consultants in EMC, Electrical safety and Telecommunication >>Compliance tests for European standards and ce-marking >>Member of NEC/IEC voting committee for EMC. >>Our Web presence: http://www.cetest.nl >>List of current harmonized standards http://www.cetest.nl/emc-harm.htm >>15 great tips for the EMC-designer http://www.cetest.nl/features01.htm >> >> >> >> >>-----Oorspronkelijk bericht----- >>Van: Tommy H. Lee <le...@khgw.info.samsung.co.kr> >>Aan: Ing. Gert Gremmen <cet...@cetest.nl> >>CC: EMC-PSTC <emc-p...@majordomo.ieee.org> >>Datum: woensdag 8 april 1998 8:04 >>Onderwerp: EN 55022 ITE Class A vs. Class B? >> >> >>>Hello Group >>> >>>I know that ITE can meet Class A ITE Limit. >>>The question is concerning European ITE EMI, Class A and B. >>> >>>Has anyone had or have known of problems with a Class A ITE >>>approval versus a Class B ITE approval. >>> >>>I have heard that Germany is requiring Class B on all equipment >>>entering into Germany (or they are planning on this). >>> >>> >>>Best regards. >>> Tommy >>> >> >> >> >
