Whilst generally not a mandated production test, a set of touch and ground conductor leakage currents might be a good idea when you have quite a few modules with different PSUs in the same rack/assembly, since you may well then exceed the maximum allowed for a unit with a single power cord with a non-locking power cord if that is what is used to connect to an adjacent supply outlet – probably most relevant in the “fully loaded” configuration. You then require further precautions (locking plugs, labelling or even a permanent connection to the supply).
John E Allen W. London, UK From: IBM Ken [mailto:ibm...@gmail.com] Sent: 03 September 2017 17:10 To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Routine Test 60950-1, 62368-1 Hi Kurt! At the system (end product level); -Do you add a PDU and plug on the manufacturing line and plug all the modules into it? -Do you have small screws, wires, etc which are used to assemble the end product which might fall into the product? -Do you have any opportunity for miswiring/misplugging? In most cases, it's a good idea to hipot the assembly as a complete product at the end of the manufacturing line. It is not usually required to re-do each module hipot test separately, but rather just once at the Mains input (but I don't know the construction of your product). Regarding your comment about height above sea level; the hipot test is based on the working voltage and the maximum operating altitude as designed (it is not dependent on the actual altitude of the factory). -Ken A On Sun, Sep 3, 2017 at 11:28 AM, Kurt Beneder <kurt.bene...@ieee.org> wrote: Hi all, i am defining the routine tests for a 19 inch Rack System according to IEC 60950-1 and IEC 62368-1. We test routinely the solid insulation of each submodule during production. The final system is variable, so some modules are sometimes in the system or not, depending on the configuration from the customer. The question for me is wether a routine test of the solid insulation of the final product is still necessary. Especially if one has many circuits with hazardous voltages (relais contacts, power supply, other hazardous voltage outputs) which increases the test effort. As far as i know the test voltages applied according the standards are for verification of solid insulation only. This is done in our case at the subassembly level: every circuit against every other circuit of the submodule So the argument sometimes that we have to retest the whole device for verification of the clearances, which could be compromised during assembly of the final product, is not valid for me as this would require much different and higher voltage levels dependent on the height above sea level of the test site. What is your opinion? Best regards Kurt Beneder - ---------------------------------------------------------------- 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) <http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> 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) <http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> 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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
