Peter, Unfortunately it is not quite so simple as looking up Table 9. IEC 61010-1 takes into account Pollution degree and Material Group (of the insulation). You need to start there to determine what creepage and clearance must be allowed for the Pollution degree that your equipment is expected to operate in. Pollution is an all-embracing term for dust and dirt of all types that may accumulate on surfaces. Pollution degree 1 includes no pollution or only dry, non-conductive pollution that has no effect on the performance of the insulation. This might apply to equipment for use in a 'clean' laboratory with climate control or if the equipment itself is sealed. Pollution degree 2 is where normally only non-conductive pollution occurs, but where temporary conductivity caused by condensation must be expected. This might be an uncontrolled laboratory, electronics workshop, or 'office-like' environment. Pollution degree 3 is where conductive pollution occurs or dry, non-conductive pollution occurs which becomes conductive due to condensation which is expected. This might be something like a factory environment. Now, if we assume Pollution degree 2 and take the worst case material Group (III), Table 4 tells us that the required creepage distance for Mains Circuits operating at 230Vrms is 3.0mm or 1.5mm on printed wiring boards. Table 5 tells us that for a working voltage of up to 300Vrms and a mains voltage of 230Vrms the required clearance is 0.94mm. This is considerably less than the creepage distance, so we will use that. Now, table 9 tells us that for a clearance of 1.0mm, the test voltage should be 1060Vrms or 1500Vpk or Vdc. Given the probability of Class Y capacitors in the mains circuit, a dc test at 1500V would probably be the best choice. I hope this helps. Best regards
Neil R. Barker CEng MIET FSEE MIEEE Manager Quality Engineering e2v technologies (uk) ltd 106 Waterhouse Lane Chelmsford Essex CM1 2QU UK Tel: (+44) 1245 453616 Fax: (+44) 1245 453571 Mob: (+44) 7801 723735 P Please consider the environment before printing this email. -----Original Message----- From: Peter Weichel [mailto:[email protected]] Sent: 21 February 2007 19:21 To: [email protected] Subject: Hipot test levels for IEC 61010-1 products Hi Experts, Could someone please help on how to select test voltage for hipot (dieletric) testing for products in the scope of IEC 61010-1. The product is mains supplied from 230V AC it´s Class I apparatus. It should be using table 9 (basic isolation) but which level to select i find a bit confusing. Which table must be used for Class II apparatus with same power supply ? Best regards Peter Electroware - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] 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] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] 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] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
