I just found out the notes about the hipot testing. The standard is IEC 60598-1 Page 343 Annex Q "Conformity testing during manufacture". Under General para., "The tests specified in this annex should be carried out by the manufacturer on each luminaire after production and are intended to reveal, as far as safety is concerned, unacceptable variation in material and manufacture. These tests are intended not to impair the properties and the reliability of the luminaire, and they vary from certain type tests in the standard by the lower voltages utilised." is stated. For hipot test, it suggests a minimum voltage of 1.5 kV a.c. for a minimum of 1 s and maximum breakdown current 5 mA for class 1 luminaires and class 2 luminaires metal encased.
Thanks and regards, Raymond Li -------------------------------------------------------------------------------------------------------------------------------------------- As far as I remember, the standard is BS EN 60598 Luminaires. I do not have this standard in hand now so I cannot quote the page and/or the clause. Does someone have this standard and take a look for me? Thanks!! Actually I have learnt this caution from different engineers a number of times especially from semi-conductor technical people but that was the first time I read it in standard. Regards, Raymond Li Omni Source Asia Ltd. --------------------------------------------------------------------- Phone: +852-2542 5303 Email: raymond...@omnisourceasia.com.hk Fax: +852-2541 9067 Kazimier_Gawrzyja l...@dell.com To: raymond...@omnisourceasia.com.hk, emc-p...@majordomo.ieee.org 23/08/01 01:52 a cc: Subject: RE: Manufacturing Hipot Testing Raymond, I'm curious...which standard were you reading? Regards, Kaz Gawrzyjal Dell Computer Corp. -----Original Message----- From: Stone, Richard A (Richard) [mailto:rsto...@lucent.com] Sent: Wednesday, August 22, 2001 12:34 PM To: 'raymond...@omnisourceasia.com.hk'; emc-p...@majordomo.ieee.org Cc: owner-emc-p...@majordomo.ieee.org Subject: RE: Manufacturing Hipot Testing I don't see where that proves anything ( 1/2 voltage testing) using voltage applicable to product is required. Testing for one second checks for shorts and miswiring or spacings that may have been decreased due to workmanship. Richard, -----Original Message----- From: raymond...@omnisourceasia.com.hk [mailto:raymond...@omnisourceasia.com.hk] Sent: Wednesday, August 22, 2001 10:26 AM To: emc-p...@majordomo.ieee.org Cc: owner-emc-p...@majordomo.ieee.org Subject: Re: Manufacturing Hipot Testing Dear All, I have read one BSEN standard suggesting not to perform hipot testing at the test voltage, 3kV, 1.25kV or 3.75kV in mass production. The reason is that it might introduce potential failure in future operation by the customer not immediate failure. It also suggests if hipot testing is done on production line, lower testing voltage, i.e., 1/2 of test voltage should be applied. I would like to have comments on this concern while doing hipot test on production line or other modern way to replace the hipot test on production line. Thanks and regards, .. Raymond Li Omni Source Asia Ltd. --------------------------------------------------------------------- Phone: +852-2542 5303 Email: raymond...@omnisourceasia.com.hk Fax: +852-2541 9067 John Woodgate <j...@jmwa.demon.co.uk> To: emc-p...@majordomo.ieee.org Sent by: cc: owner-emc-pstc@majordom Subject: Re: Manufacturing Hipot Testing o.ieee.org 22/08/01 01:39 a Please respond to John Woodgate I read in !emc-pstc that Doug McKean <dmck...@corp.auspex.com> wrote (in <001001c12a54$2b315f80$3e3e3...@corp.auspex.com>) about 'Manufacturing Hipot Testing', on Tue, 21 Aug 2001: >IMHO, if I were to address the initial question regarding >manufactoring >testing of a product bound for Europe - unless there were some severe >national deviation differences from a similar type of US domestic >approval >of the product, I'd continue along with hi-pot testing just as if the >product >were bound for a domestic (US) market. Well, you have come to the right conclusion but for two wrong reasons. In Europe, there are no longer any 'national approvals' like the old SEMKO etc. There is ONLY the Low Voltage Directive, and the European Standards (ENs) that have been 'notified' in the Official Journal as providing evidence of compliance. However, most if not all of these ENs have *mandatory requirements* for 100% production-line testing (confusingly called 'routine testing'), including a 'hi-pot' test. It is entirely the responsibility of the manufacturer to ensure that the Declaration of Conformity for the product is true, and to do that he MAY, but does not have to, employ a test-house to produce a report and maybe an expensive certificate and grant permission, in return for more money, to apply a glamorous sticker to the product. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Eat mink and be dreary! ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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