Re: CEI 255
255-4 is a 1.2/50uS pulse via 500 ohms output impedance. If memory serves me correctly it is an insulation test. I believe I have details of the 255-5 if yuo wish the essential details. Versions of these are available to purchase off the IEC website www.iec.ch ? regards John Cronin From: "Maxwell, Chris" Reply-To: "Maxwell, Chris" To: "'EMC-PSTC Internet Forum'" Subject: CEI 255 Date: Fri, 29 Sep 2000 13:36:37 -0400 Guys, (ladies too) We have a customer specification in spanish which refers to "CEI 255-4" and "CEI 255-5". I am assuming that these are "IEC" specifications. As a matter of fact, the text reads (forgive my Spanish spelling) CONDICIONES ELECTROMAGNETICAS (I think I can figure this line out :-) Toda las bornas y conectores dberan ser capaces de superar las siguientes condiciones sin midificar su rendimiento de trabajo. 4.1 Aislamiento: 2KV/50hz/1m. segun norma CEI 255-5 4.2 Pertubaciones Impulso de tension 5KV segun norma CEI 255-5 Interferencias de A.F. 2.5KV en modo longitudinal Interferencia de A.F. 1KV en modo transversal, segun norma CEI 255-4; apartado E. Anybody want to fathom a guess at this? My catalog of standards does not include either a CEI 255 or an IEC 255. Gracias Chris Maxwell a.k.a. "Speedy Gonzales", Designo Engineero GN Nettest Optical Division 6 Rhoads Drive, Building 4 Utica, NY 13502 PH: 315-797-4449 FAX: 315-797-8024 EMAIL: chr...@gnlp.com --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
RE: Verifying functionality of the equipment for Production Safety Testing
Thanks to all who responded to my inquiry on regarding verifying functionality of the equipment for Production Safety Testing. Your comments have been very helpful. Best Regards, Paul S. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
Re: US Approval
In a message dated 29/09/00 15:15:08 GMT Daylight Time, Daryl Alden writes: << Can anybody advise me whether an MRA (mutual recognition agreement )exsists between the EU and the US? If so does this mean that electrical and mechanical products tested to CE standards do not need further approval (UL?) to be marketed in the states. >> I'm not an expert on this, but I can add a view. I don't know of any MRA's but I do know that the UL requirements and CE marking requirements are coming from very different positions. UL is essentially an Electrical/fire protective issue, while Euro/CE requirements are essentially born of Freedom of Trade. There is much UL approved material which wouldn't comply with EU rules, and vice versa. There seems little room for mutual recognition under such diverse aims. My understanding is that to sell in the States, you need to use UL material regardless of it's CE approval status. To sell in the EEC you need to have a CE mark, regardless of what safety approvals the material has. Chris Dupres Surrey, UK. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
Re: Getting Started
In a message dated 29/09/00 15:43:06 GMT Daylight Time, fr...@amcomm.com writes: << I'm just getting started in the world of EMI and would like to ask a few questions. I'm not sure if I should be going the TCF route or the Standards Route. The company that I work for manufactures products which have many variants. 1) Is it EC law that a manufacturer must perform EMI testing before applying the CE mark? No. In the UK, the Electromagnetic Compatibility Regulations don't require testing if you follow the Standards Route. But you must make the Declaration of Compliance before you use the CE mark and be able to provide evidence of compliance to the regulatory authorities when challenged. This can be test results, or detailed analysis, or statements etc. Again, 'testing' per se is not a particular requirement. For instance, a simple resistive convection heater could be stated to Comply because there are no non-linear elements to produce or be affected by EMI. No need to test. Having said that, testing is the only absolutely certain way of proving compliance. And don't forget that the Regulations are Criminal Law! 2) If a manufacturer follows the Standards Route, does EC law require each variant to be tested? No. There is nio statutory need to test. But you need to provide firm evidence, when asked, that the variant is not significantly different in EMC terms to the original subject of the Compliance Declaration. A detailed technical statement would suffice, but must be accurate and traceable. Again, we are taking Criminal Law here! 3) If, when testing, the limit is exceeded, can the CE mark still be applied? No. The CE mark means that ALL relevant Directives have been complied with. If EMC limits are exceeded when using the Standards Route then it doesn't comply with the EMC Directive. If the product can't be produced without exceeding the limits, then the TCF route to compliance should be used. 4) Are the services of a Competent Body required in order to put together a TCF or can the manufacturer do that on his own? A TCF is only valid when qualified by a Competent Body. A manufacturer can build his own TCF, or an external Test House/Competent Body can build it, but at the end of the day the Competent Body signs/takes responsibility for it. Think of a TCF as a new EMC standard which relates ONLY to that particular product. A simple rule is 'if it complies with the Standards then use the Standards Route, if it doesn't then use the TCF route. Hope is useful. Chris Dupres Surrey, UK. >> --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
