Boss saw my reply and asked why I did not require this on a previous design. So more better happy follows.
Exposed-core dry iso xfmrs for use in a lab (professional use) as a separate (exposed) unit would typically require protection from shock (spacings) and touch protection. Per 61558-1, where the unit is not accessible without tools and has proper spacings to exposed conductive surface, no mandatory touch protection. Your equipment standard is probably 61010-1, so your driver is if the accessibility to the xfmr is 'normal use' - where use of tool to gain access would have no bearing. Boss more better happy? Brian -----Original Message----- From: Brian Oconnell [mailto:oconne...@tamuracorp.com] Sent: Wednesday, September 19, 2012 10:16 AM To: 'EMC-PSTC@LISTSERV.IEEE.ORG' Subject: RE: Transformer Terminals In general, consideration of 'external influences' is defined in 60364-5-51. In particular, note clauses 9, 19 and 23 of 61558-x. Level of touch protection required depends on the IP rating of the component or equipment, and intended end-use of equipment. Remember that peanut butter is not an allowed ground insulator. Brian -----Original Message----- From: emc-p...@ieee.org [mailto:emc-p...@ieee.org]On Behalf Of Kunde, Brian Sent: Wednesday, September 19, 2012 9:31 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Transformer Terminals More and more I'm seeing transformers with "Touch-Safe" (IP20) terminals being used. But now I'm being told by a supplier that these touch-safe terminals are "Required" in products marketed in Europe. Is this true? Even in applications to where the transformer is behind tool accessible panels with warning labels and would not be in an area that would require terminals to be touch safe? Are Fast-On connectors ok to use on transformers in Europe in such applications? They are touch safe once the connectors are installed. If this is not true, in what typical application are touch-safe IP20 terminals required? Switchgear maybe? Our typical application is laboratory equipment with low current isolation step-down transformers. Thanks for your input. The Other Brian - ---------------------------------------------------------------- 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>
