Hi Philip, The precedence is EMC product standards --> Generic EMC standards --> Basic EMC publications.
The Basic EMC publications act as building blocks for Generic EMC standards & EMC Product standards. The Generic EMC standards act as building blocks for EMC Product standards. You can get more info at the link - http://www.iec.ch/emc/basic_emc/ Regards, Rajneesh On Thu, Jan 14, 2016 at 6:49 AM, Philip Stevenson <pw...@hotmail.co.uk> wrote: > Dear List Members > > > > The Generic EMC Immunity Standard BS EN/IEC 61000-6-1 references a > number of "Basic Standards" which are associated with each of each of the > EMC Immunity Test Requirements. > > > > I have been advised that the Generic EMC Immunity Standard BS EN/IEC > 61000-6-1 test requirements have precedence over the referenced "Basic > Standards". Is this correct? > > > > My reason for asking relates to the Generic EMC Immunity Standard BS > EN/IEC 61000-6-1 Surge and Fast Transient Immunity Test Requirements for a > DC Power Input of a product. This test requirement references "Basic > Standards" IEC 61000-4-5and IEC 61000-4-4 in Table 3. > > > > The following questions relate to a product which is powered from a 28V dc > output from a 230V ac Mains Powered COTS DC Power Supply. > > > > *Surge Immunity Question:* > > > > The Generic EMC Immunity Standard BS EN/IEC 61000-6-1 Table 3 Surge > Immunity Test Requirement refers to Basic Standard IEC 61000-4-5. > > > > As previously stated the Product is powered from a 28V dc output from a > 230V ac Mains Powered COTS DC Power Supply via a shielded cable assembly > which is less than 10 metres in length. > > > > In the Basic Standard IEC 61000-4-5: 2014 Section 7.6 it states that "No > test shall be required for cables according to the manufacture's > specification are less than or equal to 10 metres." > > > > Whereas the Generic EMC Immunity Standard BS EN/IEC 61000-6-1 Surge > Immunity Test Requirement caveat "c" states that "Apparatus with a DC power > input port intended for use with a AC-DC Adaptor shall be tested on the AC > power input to the AC-DC Adaptor". > > > > As the products DC power input cable assembly is shielded the Basic > Standard implies no testing is required. Whereas the Generic EMC Immunity > Standard implies the AC power input to the COTS DC Power Supply needs to be > tested. My question is which of these test requirements has precedence? > > > > *Fast Transient Question:* > > > > The Generic EMC Immunity Standard BS EN/IEC 61000-6-1 Table 3 Fast > Transient Immunity Test Requirement caveat "d" states that "Apparatus with > a DC power input port intended for use with a AC-DC Adaptor shall be tested > on the AC power input to the AC-DC Adaptor". > > > > I have been advised that the Fast Transient Immunity test needs to be > performed on the DC Power Input cable. > > > > My question again is which of these test requirements has precedence? > > > > I would be grateful for any advise or guidance the members can provide on > these matters. If you prefer to reply to me be directly instead of via the > list my personal Email address is pw...@hotmail.co.uk. > > > > > > > > Regards > > > > > > Philip Stevenson > > - > ---------------------------------------------------------------- > > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. 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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>
