GDT internal spacing? not if a gas tight tube. External terminals for sure, but internal not, because the internal pressure does not go to altitude. It remains at the same pressure, unlike parts open to the environment. BUT, when an agency and their personnel are involved, there is no telling what sort of 'requirements' will be imposed.
>________________________________ > From: mark gandler <markgand...@hotmail.com> >To: EMC-PSTC@LISTSERV.IEEE.ORG >Sent: Friday, September 6, 2013 5:37 PM >Subject: Re: [PSES] Safety and Altitude and GDT > > >Thank you everyone for sending your feedbacks. >Asking any question at the same as "spark gap" question its like releasing >your indie film on the same weekend as "Spider-man" > > >Limited responses were ranging from "never heard of anyone asking for more >than 2000m" to "different" to "2500; 3048, 4000 and 5000" >To "you only need 5000m if applying for CCC" > >Let me try to spice up the discussion a bit. Below is the language from >IEC60950-1 ed2.2 : > >"For all other equipment, it is permitted to bridge BASIC INSULATION by a VDR >in series with a >GDT provided that: >− the VDR complies with the requirements of Annex Q; and >− the GDT complies with: >• the electric strength test for BASIC INSULATION; and >• the external CLEARANCE and CREEPAGE DISTANCE requirements for BASIC >INSULATION." > >We had a case applying power supply to CCC requiring Internal spacing of GDT >to comply with clearances and creepages as well. > >Did anyone else have this or similar experiences and why would anyone care >about GDT internal spacing? >And just to confirm: GDT spacing requirements will have to be adjusted for >altitude as well, correct? > > >-----Original Message----- >From: Boštjan Glavič [mailto:bostjan.gla...@siq.si] >Sent: Thursday, September 05, 2013 10:42 PM >To: EMC-PSTC@LISTSERV.IEEE.ORG >Subject: Re: [PSES] Safety and Altitude > >Exactly, I only listed what we have tested for CB in general. I know that Peru >has no national deviations but many cities are above 3000m. > >Best regards, >Bostjan > >-----Original Message----- >From: Paul Wang [mailto:paulw...@gmcompliance.com] >Sent: Friday, September 06, 2013 7:34 AM >To: Boštjan Glavič; EMC-PSTC@LISTSERV.IEEE.ORG >Subject: 答复: [PSES] Safety and Altitude > >For China CCC, there is no 2500m, 3048m, only 2000m and 5000m. >So you have the choice to add the altitude symbol to show the using condition >is below 2000m, or you can test the clearance distance to meet the higher >altitude requirements. >If you are certifying a product with CCC certified power supply, the power >supply need to be approved to the new GB4943 standard first. If the power >supply can be used below 2000m only, the end product also need to declare the >2000m altitude. > >Paul Wang (王卫波) >G&M Compliance,Inc.Beijing Office >Tel:86-10-58203318 >Cell:86-13810026747 > >-----邮件原件----- >发件人: Boštjan Glavič [mailto:bostjan.gla...@siq.si] >发送时间: 2013年9月6日 11:20 >收件人: EMC-PSTC@LISTSERV.IEEE.ORG >主题: Re: [PSES] Safety and Altitude > >In addition to 5000m and 2000m we have also approved products up to 2500m, >3048m and 4000m. > >Best regards, > >Bostjan Glavic >SIQ > >On 6. sep. 2013, at 03:12, "IBM Ken" ><ibm...@gmail.com<mailto:ibm...@gmail.com>> wrote: > >I've used a number of different altitudes beyond the 2000m default (scaling >based on IEC 60664 as mentioned in annex G of '950). > >You may know this, but I just want to point out- your product does not have to >*function* at 5000m, it can shut down for OT or whatever, they just seem to >want the spacings set for 5000m. > >You also have the option of labelling with the "no mountains" graphic if you >can't get 5000m spacings. >On Thu, Sep 5, 2013 at 4:49 PM, Mark Gandler ><markgand...@hotmail.com<mailto:markgand...@hotmail.com>> wrote: >Hi there, > >Wanted to get some simple data point based on your experiences across >different companies and industries: what are an altitude levels been used >while evaluating 60950-1 isolation requirements? By default you get 2000m, how >many of you used different levels? >This is driven by 5000m CCC requirement and some critical power supply >component limitations. >If there will be enough responses, I’ll send back statistical breakdown. > >Thank you for reading, >Mark >- >---------------------------------------------------------------- > >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 ><emc-p...@ieee.org<mailto:emc-p...@ieee.org>> > >All emc-pstc postings are archived and searchable on the web at: >http://www.ieee-pses.org/emc-pstc.html > >Attachments are not permitted but the IEEE PSES Online Communities site at >http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used >formats), large files, etc. > >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 <emcp...@radiusnorth.net<mailto:emcp...@radiusnorth.net>> >Mike Cantwell <mcantw...@ieee.org<mailto:mcantw...@ieee.org>> > >For policy questions, send mail to: >Jim Bacher <j.bac...@ieee.org<mailto:j.bac...@ieee.org>> >David Heald <dhe...@gmail.com<mailto:dhe...@gmail.com>> > >- >---------------------------------------------------------------- > >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 ><emc-p...@ieee.org<mailto:emc-p...@ieee.org>> > >All emc-pstc postings are archived and searchable on the web at: >http://www.ieee-pses.org/emc-pstc.html > >Attachments are not permitted but the IEEE PSES Online Communities site at >http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used >formats), large files, etc. > >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 <emcp...@radiusnorth.net<mailto:emcp...@radiusnorth.net>> >Mike Cantwell <mcantw...@ieee.org<mailto:mcantw...@ieee.org>> > >For policy questions, send mail to: >Jim Bacher <j.bac...@ieee.org<mailto:j.bac...@ieee.org>> >David Heald <dhe...@gmail.com<mailto:dhe...@gmail.com>> > >- >---------------------------------------------------------------- >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 ><emc-p...@ieee.org> > >All emc-pstc postings are archived and searchable on the web at: >http://www.ieee-pses.org/emc-pstc.html > >Attachments are not permitted but the IEEE PSES Online Communities site at >http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used >formats), large files, etc. > >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 <emcp...@radiusnorth.net> >Mike Cantwell <mcantw...@ieee.org> > >For policy questions, send mail to: >Jim Bacher: <j.bac...@ieee.org> >David Heald: <dhe...@gmail.com> > >- >---------------------------------------------------------------- >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 ><emc-p...@ieee.org> > >All emc-pstc postings are archived and searchable on the web at: >http://www.ieee-pses.org/emc-pstc.html > >Attachments are not permitted but the IEEE PSES Online Communities site at >http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used >formats), large files, etc. > >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 <emcp...@radiusnorth.net> >Mike Cantwell <mcantw...@ieee.org> > >For policy questions, send mail to: >Jim Bacher: <j.bac...@ieee.org> >David Heald: <dhe...@gmail.com> > >- >---------------------------------------------------------------- >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 ><emc-p...@ieee.org> > >All emc-pstc postings are archived and searchable on the web at: >http://www.ieee-pses.org/emc-pstc.html > >Attachments are not permitted but the IEEE PSES Online Communities site at >http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used >formats), large files, etc. > >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 <emcp...@radiusnorth.net> >Mike Cantwell <mcantw...@ieee.org> > >For policy questions, send mail to: >Jim Bacher: <j.bac...@ieee.org> >David Heald: <dhe...@gmail.com> > > > - ---------------------------------------------------------------- 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 <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <emcp...@radiusnorth.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
