Hi Robert: By using the phrase 'Y cap', I assume you're talking about an application where the parts are connected from AC mains to Ground.
1) Some Y caps can have a very big voltage coefficient. Even if you match them by hand with a bridge, they may not be matched with 120Vac or 230Vac applied. 2) If the AC phases have different voltages (i.e., 1Vac from Neutral-Ground and 120Vac from Line-Ground), you could have a very big mismatch in capacitance. Pat Lawler EMC/Reliability Engineer SL Power Electronics Corp. <[email protected]> wrote on 01/23/2008 03:23:53 PM: > Does anyone know in RFI/EMI Line Filters how closely do Y > Caps match? > Are they 1%, 0.1%, or even better? > > Robert - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] 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] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
