Dave, In my experience, a design that meets a MIL-STD carries absolutely no weight with any NRTL's, Notified Bodies, or Competent Bodies if the design is not compliant with the applicable standard. If the equipment is to be placed on the market in the EU, then of course, it must comply with all applicable standards. So bottom line, unless the product enjoys some sort of exemption for military use, it will need to comply with the applicable standard for the end product and any components.
Best regards, Daniel E. Teninty, P.E. Managing Partner DTEC Associates LLC Streamlining the Compliance Process Spokane, WA (509) 443-0215 (509) 443-0181 fax -----Original Message----- From: owner-emc-p...@ieee.org [mailto:owner-emc-p...@ieee.org]On Behalf Of k3row Sent: Wednesday, March 28, 2001 12:51 PM To: emc-p...@majordomo.ieee.org Subject: Transformer isolation (military) Has anyone out there got any comments about the following: I have been involved with the import, into the U.K, of an item of "off the shelf" military equipment from the U.S.A. This avionics item operates from 3 phase 115v rms. I am told that the internal step down power transformer, which as far as I am concerned is required to provide double insulation primary to secondary, is only required to have 500v rms isolation, primary to secondary. This attribute, it is said, is compliant to MIL-T-27. There is always the perennial problem of matching military equipment characteristics to modern safety specifications, particularly for existing equipment, but 500v seems rather low, but then the MIL spec is current. Does anyone have any comments or advice about this. Dave Palmer
