I’m sure the software can be written to do this, but on my Surge Tester it would really work the heck out of the relays.
As example: I would program the tester for L-N with all the other parameters. Then tell it to START to which the tester energized all the relays for the coupling path. After it charges up, then I send it a TRIGGER which dumps the surge into the coupling path. At this point, I cannot reprogram the tester for a different coupling path without sending it a STOP command to which the tester opens all the coupling path relays. Now I can reprogram the coupling path to L1-N (or whatever) and send the START again. As you can see, this method would really work the relays. I think I would have the same issue with trying to do Alternating Polarities. My tester will do it, but only if I program the tester to run an internal program. I do not like to do that because the tester does not give my computer any feedback until it is done. So I like my computer software to control the tester where there are some limitations on what can be done. As a corporate lab, time is money so we usually test 10-15 seconds between pulses. Our tester will not recharge any faster than that. Our type of equipment allows for this but I know that isn’t the case for everyone. My point here is that I wouldn’t wear out my tester to save a couple hours on a test. If reducing the test time is your goal there are other methods I would try first. Hope my opinions and commends were helpful. The Other Brian ________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of Honkala, Ari (Espoo) Sent: Thursday, September 24, 2009 2:18 AM To: EMC PSTC Subject: RE: IEC61000-4-5 reversed polarity or not Hi, does anybody see a problem if the test sw is set to do a single positive pulse to L-N, then L1-N, L2-N and so forth until all specified coupling paths have been done, then repeat so that the required # of pulses per path is achieved. Then repeat the same with negative pulses. This would allow shortening the time between individual pulses from the 1 min since the same insulation is not not stressed immediately again. Ari Honkala SGS FIMKO Finland ________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of Doug Kramer Sent: 23. syyskuuta 2009 17:12 To: EMC PSTC Subject: RE: IEC61000-4-5 reversed polarity or not Kris, In my experience most follow the “+++++ then -----” pattern. We currently do and it is the way that at least 3 different automation software packages setup the test for 61000-4-5 by default. -Doug From: [email protected] [mailto:[email protected]] On Behalf Of Carpentier Kristiaan Sent: Wednesday, September 23, 2009 8:49 AM To: John J Radomski Cc: EMC PSTC Subject: RE: IEC61000-4-5 reversed polarity or not John, Cl 6.1.1 says “positive & negative” but not between consecutive pulses. I ask because some labs do testing +++++ then -----. Kind regards, Kris Carpentier Regulatory & Approvals From: John J Radomski [mailto:[email protected]] Sent: woensdag 23 september 2009 15:42 To: Carpentier Kristiaan Cc: EMC PSTC Subject: Re: IEC61000-4-5 reversed polarity or not Hi Kristiaan, > Is it common practice to reverse polarity in this standard as well? Yes it is. This can be found in Cl. 6.1.1. Regards, John "Carpentier Kristiaan" <[email protected]> Sent by: [email protected] 09/23/2009 09:22 AM To "EMC PSTC" <[email protected]> cc Subject IEC61000-4-5 reversed polarity or not Hi group, The lightning protection standard ITU-T K.44 clearly states that the polarity of the surges shall be reversed between consecutive pulses. IEC61000-4-5 does not state that requirement. Is it common practice to reverse polarity in this standard as well? Vriendelijke groeten, meilleures salutations, mit freundlichen Gruessen, best regards, Kris Carpentier - 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]> - 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]> - 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]> - 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]>
