I read in !emc-pstc that John Allen <ja014d7...@blueyonder.co.uk> wrote (in <048001c24f9d$bd8895a0$0200a8c0@johnallen>) about 'Electric Fence Controllers' on Thu, 29 Aug 2002: >I once (about 12 years ago) had the dubious priviledge of being the Comittee >Secretary for the UK BSI standards committee dealing with these beasts at >British & International levels!
What is now CPL/61? > >This question was never asked (that was probably before my time!) but it was >my impression that these had fallen into the "too difficult" category and >the Commission at the time of the Directive (1972/73)ducked the issue to >ensure that it got agreed and that all the more common items got dealt >with.. I think you are right. > >There certainly was (and probably still is - which is why the situation in >the Directive does not appear to have changed) Item 10 of the Commission 'request for comment document 'LVD Update 1' says: QUOTE General support to include "Electric fence controller" to the scope of the LVD. France: Objection because the intended use of these products is not inline with the aims of the directive. ENDQUOTE >a considerable difference of >opinion between various countries as their safety and what the voltage and >particular pulse tim/energy limits should apply. Indeed. Related to the perimeters of typical fields. > >Effectively, countries with small fields (like many in Europe) wanted low >power units which probably were safe enough for general use, and possibly >could have been kept within the LVD by some form of energy limitation kluge. >However, countries with "big" - or "very big" (like Australia and New >Zealand, etc.) - fields wanted units with lots more energy to avoid the >deterent effect being substantially reduced by contact with conductive >vegetation, etc. Of course, at agricultural shows in Britain, they are demonstrated producing 5 cm sparks. I wonder how they do that. (;-) > >In the end (after I left BSI) I believe that some units were finally covered >under Part 2 Sections of IEC 60335 - but I personally doubt that they are >the high power versions. BS EN 60335-2-76. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
