Dave, Your questions combine two tests: 1) There are no leakage current limits during hipot testing. The hipot test seeks insulation breakdowns (insulating materials & air), not excessive current through filter capacitors. The 3.5 mA leakage current limit refers to the separate Leakage Current Test aka Touch Current (line power test measuring the "leakage current" through a human body model). 2) Note that if you have filter capacitors, you should be hipot testing with DC. With AC testing, you are conducting excessive currents through your Y capacitors which could damage these caps. (Could you then be shipping a product that would fail conducted emissions?). DC hipot testing will result in very little current flow during testing. 3) DC hipot testing is done at the peak voltage of the AC specification = 1.414 x AC test voltage. 4) FYI - occasionally I hear requests from those new to hipot testing for more powerful hipot testers because "they need more current capacity from their tester" = they don't need a bigger hipot tester, they need to be testing with DC. Regards, Bill Bisenius E.D.& D. bi...@productsafet.com www.productsafeT.com
-----Original Message----- From: drcuthb...@micron.com [mailto:drcuthb...@micron.com] Sent: Tuesday, August 05, 2003 8:04 PM To: emc-p...@majordomo.ieee.org Subject: Hipot question I am testing some in-house equipment that is covered under EN61010. Is the AC line touch current limit 3.5 mA at line + 10%? When I run a hipot test am I allowed to use 2121 VDC rather than 1500 VAC? Due to the 0.047 uF X caps the AC hipot current is somewhat high. Dave Cuthbert Micron Technology This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
