Hello Doug, I think the enclosure of EMI filters is necessary. The enclosure (normally metallic and, if the filter should work well, connected to ground) prevents, that for example by radiation, disturbing signals could get into your filtered equipment. The filter would be "bypassed".
Regards Ludger Revermann -----Ursprüngliche Nachricht----- Von: POWELL, DOUG <[email protected]> An: EMC-PSTC (E-mail) <[email protected]>; Treg Listserv (E-mail) <[email protected]> Gesendet: Mittwoch, 8. Dezember 1999 18:16 Betreff: Open Frame EMI Filters > > Hello group, > > For years I have used off-the-shelf and custom EMI filters with a fully > enclosed metal canister. Why is this enclosure required? Are there > specific provisions in the standards? My idea is to build up the filter > circuit on a printed circuit board and make it an integral part of the > power supply. > > I am currently looking at EN133200 which has certain seal tests but after > reviewing these, they all appear to be related to climatic or environmental > conditions. If the product passes these tests without the enclosure it > would seem that the product has passed, period. > > Alternatively I have considered removing the nomenclature "EMI filter" and > simply call it an input module, then evaluate it as a part of the overall > system. If it passes the EMC and Product Safety requirements, can I call > the job complete? > > Any thoughts? > > ======================================= > Douglas E. Powell > Regulatory Compliance Engineer > Advanced Energy Industries, Inc. > 1625 Sharp Point Dr. > Fort Collins, Colorado 80525 USA > m/s: 2018 > --------------------------------------- > 970-407-6410 (phone) > 970-407-5410 (e-fax) > 800-446-9167 (toll-free) > mailto:[email protected] <mailto:[email protected]> > http://www.advanced-energy.com <http://www.advanced-energy.com> > ======================================= > > --------- > This message is coming from the emc-pstc discussion list. > To cancel your subscription, send mail to [email protected] > with the single line: "unsubscribe emc-pstc" (without the > quotes). For help, send mail to [email protected], > [email protected], [email protected], or > [email protected] (the list administrators). > > --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
