I read in !emc-pstc that [email protected] wrote (in <LFENJLPMMJB [email protected]>) about 'Company close down due to EMC phenomena', on Wed, 16 Jan 2002: >Questions: >1. Is it possible to have different approaches within EU ?
No. >2. Since PLC/PLT is "quite new" technology and since we do not have any EU >product standard (no standard for whose who are using 100kHz-400kHz band), I >like the approach "as long as you do not disturb other equipment, install >it. If you do disturb, we will come and remove it". What is your opinion >about this? The problem is that the technology has run far ahead of the standardization, in this case, simply because it is a very complex technical problem, not because it's been ignored. >3. The transmission occurs very seldom. 25ms/hour, that is 7e-6 and >approximate 0,001% transmission rate. Can this seldom transmission rate be >an argument to not test the PLC product under continuous transmission ? I >would say yes, but which rate is acceptable / reasonable ? I don't think ad hoc solutions like that are appropriate. A proper resolution of the fundamental problem is essential. > >So, why should the company close down ? Because if the national authority >gets what they want, there will be one sale. Logical, but is it a correct >prohibition the authority call? No, it is an unduly harsh interpretation. The following IEC standard may be helpful: Project : IEC 61000-4-13 Ed. 1.0 Committee 77A Current document 77A/368/FDIS Current status CDIS - Draft circulated as FDIS Title (English): Electromagnetic Compatibility (EMC) - Part 4-13: Testing and measurement techniques - Harmonics and interharmonics including mains signalling at a.c. power port, low frequency immunity tests - Basic EMC Publication -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk After swimming across the Hellespont, I felt like a Hero. ------------------------------------------- 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: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
