<002601c0b7c8$c647a460$6a4218d4@hppav>, k3row <[email protected]> inimitably wrote: > 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
500 V is OK if the supply is designed never to have any transient overvoltage more than some value less than 500 V. -- Regards, John Woodgate, OOO - Own Opinions Only. Phone +44 (0)1268 747839 Fax +44 (0)1268 777124. http://www.jmwa.demon.co.uk Why not call a vertically- applied manulo-pedally-operated quasi-planar chernozem-penetrating and excavating implement a SPADE? ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on "Virtual Conference Hall,"
