We do not want to overburden your customer with private vs public distribution systems issues, so how common is it for a non-residential location such as a business, shop, laboratory, factory, office building, etc. to be powered by a public vs private distribution system? In the US, most non-residential locations would have their own transformer but I'm told this is not the case in Europe.
We have some products that draw 40-50 amps at 230VAC that use high power heating elements that must use phase control to be able to keep the temperature in an oven within a very tight specification (high tech analytical equipment). We have found no other practical way to control the temperatures and not shorten the life of the expensive heating elements, so we specify that such devices must be powered by a Private Distribution System or to seek the permission from your utility company. What we struggle with here in R&D is are we causing a hassle for our European Customers? Our sales force seems to be able to sell them without any complains. I wonder how closely such things are monitored in Europe. I assume as long as you are not blowing up transformers it will not get much notice. The Other Brian From: [email protected] [mailto:[email protected]] On Behalf Of John Woodgate Sent: Friday, December 05, 2008 11:34 AM To: [email protected] Subject: Re: Mains Harmonics, Flicker, and Industrial Applications In message <[email protected]>, dated Fri, 5 Dec 2008, Carl Newton <[email protected]> writes: >It's my goal to gain confidence through consensus. I see within the >Scope of EN 61000-3-2 and -3 that those standards should apply to >devices which are connected to 'public low-voltage distribution >systems'. Are panel-mount type devices intended for use in industrial >applications generally exempt from those standards due to this clause? What do you mean by a 'panel-mount device' If it isn't a finished product, but something like a meter or switch, then it's a component and the standards do not apply to components. If it is a finished product, clearly unsuitable for operation from the public supply, or if the manufacturer specifies that it is NOT INTENDED to be used on the public supply, preferably with an explanation that it does (or may) not meet the required standards, then the standards do not apply. We don't have any certainty that a manufacturer's statement would be accepted by every regulatory authority, even though it should be. The responsibility for using such a product on the public supply in defiance of instructions must rest with the user. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk Either we are causing global warming, in which case we may be able to stop it, or natural variation is causing it, and we probably can't stop it. You choose! John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]> LECO Corporation Notice: This communication may contain confidential information intended for the named recipient(s) only. If you received this by mistake, please destroy it and notify us of the error. Thank you. - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
