I'm not much on commercial specs, but the technical rationale for enclosing filters in a metal canister is to prevent radiated coupling around the filter.
---------- >From: "POWELL, DOUG" <[email protected]> >To: "EMC-PSTC (E-mail)" <[email protected]>, "Treg Listserv (E-mail)" <[email protected]> >Subject: Open Frame EMI Filters >Date: Wed, Dec 8, 1999, 9:16 AM > > > 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).
