Hi, Doug, I.e., Phoenix Contact uses a thermo-fuse, heated from failed MOV. http://stevenengineering.com/tech_support/PDFs/67PT.pdf Please, look at figure 19
> Voltage sensing the fuse is useful on any line which has enough voltage with > respect to earth. The MOV tied to the neutral is much more difficult to > detect in this way. However, I would venture to say that this MOV is not > subjected to so many impulses as the other. In my practice the using of MOVs to ground is prohibited due to their leakage currents. Best regards, Alex - ---------------------------------------------------------------- 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]>
