Hi Treg, re Battery casings I am not absolutely certain but believe that the distinction may lie in the fact that UPS spec batteries quoted are housed within the UPS cabinet and thus within a fire enclosure. The back up case for EN 60 950 can be stand-alone batteries in an equipment room such that the battery housing is also the fire enclosure.
Hope this helps, even if only by triggering further debate from other tregers! It will be interesting to see other comments. Regards: Bill Ellingford ---------- From: Alan Booth[SMTP:a.bo...@ftel.co.uk] Sent: 01 June 1999 12:21 To: treg@world.std.com Subject: Battery casing material Dear Treggers, We have a battery back-up unit which will drive our product in the event of power failure. We have been trying to find batteries whose casing has a flammability rating of V-0 (customer requires that all materials shall be V-0). EN60950 (IEC950) calls for V-2 or better. Our attention has been drawn to EN50091-1 :1993 a standard for Uninterruptable Power Systems. Section 4.4 states that The provisions of 4.4.1 to 4.4.8 of the referred document (EN60950) apply and in addition the following note to 4.4.3.2/RD applies: 'Batteries shall have a flammability class HB or better'. Does anyone know the reason for the relaxation on flammability requirements for batteries used in UPS? Best regards, Alan Booth. Equipment Engineering Group Fujitsu Telecommunications Europe Limited Solihull Parkway Birmingham Business Park Birmingham B37 7YU Telephone +44 121 717 6492 FAX +44 121 717 6014/6018
<<application/ms-tnef>>
