More relevant, 3k vs 4.2K, heck I don't know. I'm just trying to find the correct values. Again the test house gave me 4242 but the largest I can see for reinforced insulation is from Table 5b for 60950-1 specifies the 3k test voltage for reinforced insulation and 1500 for basic insulation - bot AC values. Certainly, an overtest resulting in a failure is invalid and there is there is no need to pester the power supply manufacturer over it. But if the value is correct then then I do pester them. But again I can't find the basis for the level in the ITE standard - which is different than the power supply standard - so I'm just checking with you folks power supply folks about the normal test levels during both Type and production tests.
For the record the power supply vendor has always been a good supplier and now that I've finally been able to penetrate their structure to find the right guy they are being co-operative. But occassionaly things go amok after safety approvals are complete and I need to address that issue along with the proper test values. I'm just trying to align my own ducks and firm up my understanding before I proceed to far in either direction. Since the safety house gave me what I think are bad numbers its no sense going back to them and asking again without confirmation that the numbers are bad. I appreciate all your help so far. Gary From: [email protected] [mailto:[email protected]] On Behalf Of Brian O'Connell Sent: Thursday, October 19, 2006 2:14 PM To: [email protected] Subject: RE: SMPS power supply type test and manufacturing test dielectric values > -----Original Message----- > From: [email protected] [mailto:[email protected]]On Behalf Of > [email protected] > Sent: Thursday, October 19, 2006 1:50 PM > To: McInturff Gary > Cc: [email protected] > Subject: Re: SMPS power supply type test and manufacturing test > dielectric values > > Gary, > > Check the line to ground caps. We always insist on Y1 caps under IEC > 60384-14 in this position or 2 each Y2 caps in series. We > always type test > our power supplies and machines at 3000 volts AC. Some will > insist they Why are you performing Type Tests on a component power supply if it is an approved unit with a valid CB Test report ? > want to use DC for these tests but we have not had a problem > as long as the > Y-caps are good quality. This would depend on the cap value and the trip current setting. Why would a test level of 3000Vac be more "relevant" than 4245Vdc ? > > You should not be seeing capacitor failures in those > positions at those > voltages. I agree Brian - 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 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 ______________________________________________________________________
