I'm making some headway on this but seem to be at a roadblock with the solid state contactors. Crydom was at one point providing SCCR ratings for their product with fuses. They have since stopped doing this. What are others doing to get past the 5kA threshold
To answer my own question it appears that with respect to the inverters the answer is yes. Was able to find a document saying as much at a manufacturer's website that provides links to most of their certification documentation. Many don't. Kevin -----Original Message----- From: Brian Oconnell [mailto:[email protected]] Sent: Thursday, January 26, 2012 12:49 PM To: [email protected] Subject: Re: [PSES] Control Panel Interrupt Ratings Looks like you need to block out some reading time on your schedule. Insufficient information to determine requirements. SquareD, Siemans, and Eaton would probably have much info on cb/fuse coordination. Type 2 coordination is for IEC60947. Look at UL508/508A and CSA No 14, and their intersection with NEC articles 110, 240, 408, and 690 for interrupt requirements. Brian -----Original Message----- From: [email protected] [mailto:[email protected]]On Behalf Of Kevin Ambrose Sent: Thursday, January 26, 2012 7:31 AM To: [email protected] Subject: Control Panel Interrupt Ratings I have a question regarding determining the interrupt rating for a control panel in the US. In particular I would like clarification for the combination of inverters (or other equipment) with the manufacturer's recommended fusing. If the recommendation is followed does the assembly of the 2 components have the interrupt rating of the fuse? Similarly if I have a solid state contactor and fuse that limits the let through current to less than the inrush current resistance what rating does the combination assume. It is my understanding that this is the case when type 2 coordination is done with contactor/fuse combinations the fuse rating applies. Does this work the same way or am I off base. Thanks Kevin Ambrose Control Technologies Inc. - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ 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]> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ 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]>
