I want to monitor mains of polyphase power systems VA/VB/VC/VN using EN/UL 61010-1
Ratings: 400VL:N/G; 600/690 L:L CAT III, PD2, 3Km elevation Issue I see is to get the phase to phase spacings on my terminal block. Requirements in Annex K are 5.5mm at 2Km but go up to ~ 6.3mm at 3Km. I would like to use a 4 position 7.62mm pitch terminal block and with oval pcb pads we can manage 5.5mm spacing between the plated through hole pcb pads. Hope to use a Phoenix Contact Combicon right angle header and matching terminal plug. Wire size max would be 14 AWG. I could slot the pcb between phases and coat the pcb in this area with Humiseal or similar. A competitor is claiming the same specs using same standard using coatings/slot but I do not see how they navigate the standard to claim their ratings t My take on the coating is that just reduces the effective pollution degree and the tables give no relief in that regard at PD1. Q - can the coating be considered more of a potting? Q - Are there any angles to pursue that would give use what we want? Or other ideas on how to terminate? An alternative is to use a 5.08mm pitch 7 position terminal block and depopulate the even positions. Most of the larger pitch terminal blocks are designed for high current and are too massive. Your thoughts/suggestions? Thanks Chris Wells - ---------------------------------------------------------------- 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 <emc-p...@ieee.org> 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://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>