Another UL specific test to consider it the Connector Current Interrupt Test. Hot plug your device 200 times and recheck the dielectric strength and earth path. It is a new UL requirements and the test sheet currently does not have a number on it. Well not he one I had to fill in the other month.
[email protected] wrote: > Dan, > > Without knowing any detail on your product, my vote is to say that all of > the requirements of 60950 that apply to any other power supply would apply > in full to a hot swappable supply. Assuming the supply you're handling is > akin to a bank of rectifiers in a shelf, the shelf would also need space > fillers to close off access to hazardous parts in the event that a full > complement of supplies is not used. I assume the over-all design addresses > in-rush currents at both the supply and shelf ends, labels, warnings, > instructions, etc....the full monty. > > My opinion and not that of my employer. > Regards, > Kaz Gawrzyjal > [email protected] > > -----Original Message----- > From: Richardson, William G [mailto:[email protected]] > Sent: Wednesday, June 20, 2001 4:50 PM > To: 'Dan Teninty' > Cc: '[email protected]' > Subject: RE: Hot Swappable Power Supplies ? > > There must be a bleeder resistor (across the X caps) to make the AC input > pins safe to touch once the supply is removed from the cabinet. > > If there are exposed voltage or energy hazards with the supply removed, > there must be a restriction such that only trained personnel are instructed > to do this OR a tool must be used to remove the supply. > > -----Original Message----- > From: Dan Teninty [mailto:[email protected]] > Sent: Wednesday, June 20, 2001 4:16 PM > To: Emc-Pstc@Majordomo. Ieee. Org > Subject: Hot Swappable Power Supplies ? > > Do any of my esteemed colleagues know of any specific requirements in 60950 > (UL/CSA or EN) relating specifically to hot swappable power supplies? A > search in the PDF version of UL/CSA 60950 reveals nothing specific when > searching for "hot", "swap", or "power supply". A visual search of the TOC > also reveals nothing specific. > > 2.6.5.4 deals with : > > Parts that can be removed by an operator > Protective earthing connections shall make earlier and break later than the > supply connections > in each of the following: > - the connector of a part that can be removed by an OPERATOR; > - a plug on a power supply cord; > - an appliance coupler. > Compliance is checked by inspection. > > This is the most I could find that was related, and then it is referring to > the AC side. > > Thought I would triple check with the collective brain trust to be sure. > > Appreciate any pointers to passages that I missed. > > Thanks, > > Daniel E. Teninty, P.E. > Managing Partner > DTEC Associates LLC > Streamlining the Compliance Process > 5406 S. 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Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on "Virtual Conference Hall,"
