Hi Folks Another possibility: try to find fully-insulated quick-release terminals which have a manually-operated lock and don't require a tool.
(We had to do this recently when we had a similar problem with batteries n confined spaces in vehicles) John Allen Thales Defence Ltd Bracknell, UK -----Original Message----- From: Ralph Cameron [mailto:ral...@igs.net] Sent: 01 March 2001 15:16 To: John Woodgate; emc-p...@majordomo.ieee.org Subject: Re: Battery terminals isolation John: How about an insulated wrench? Ralph Cameron EMC Consulting and Suppression of Consumer Electronics (After sale) ----- Original Message ----- From: "John Woodgate" <j...@jmwa.demon.co.uk> To: <emc-p...@majordomo.ieee.org> Sent: Wednesday, February 28, 2001 3:47 PM Subject: Re: Battery terminals isolation > > <sa9d1398.077@sao0002n>, SERGIO LUIZ DA ROCHA LOURES SERGIO > <sergioro...@siemens.com.br> inimitably wrote: > >Can the group tell me if there is any requirement about isolations of lead acid > >battery terminals? > >We have a 48V equipment powered by lead acid batteries. The negative of the > >batteries set is connected to the enclosure. When the batteries need to be > >replaced, short circuit happens if the tool used to detach the connectors touch > >the enclosure and the positive of the batteries. > >Information to disconnect the negative terminal first before replace the > >batteries is clear in the service manual, but I don't know if only this is > >sufficient. > > I don't know of anything explicit in any standard, but the consequences > of shorting a 48 V battery could be very serious, up to loss-of-life. > Therefore I would think in terms of the General Safety Directive, which > says, in effect, 'make it safe, then make it safer'. So: > > - put a warning notice **next to the battery** saying 'Disconnect THIS > terminal first.' Don't rely on a drunken blind, idiot knowing which is > the negative one. > > - if possible, fix to the negative connector a plastic shield that > covers up the positive terminal and connector, so you can't even get at > the positive terminal without first removing the negative one. If you > need to be able to measure the battery voltage with a multimeter, put a > small hole in the shield that will just admit a test-prod. > > You could perhaps put the warning notice on the shield itself. > -- > Regards, John Woodgate, OOO - Own Opinions Only. Phone +44 (0)1268 747839 > Fax +44 (0)1268 777124. http://www.jmwa.demon.co.uk Foxhunters suffer from > tallyhosis. PLEASE do not mail copies of newsgroup posts to me. > > ------------------------------------------- > 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: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Michael Garretson: pstc_ad...@garretson.org > Dave Heald davehe...@mediaone.net > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > Jim Bacher: j.bac...@ieee.org > > All emc-pstc postings are archived and searchable on the web at: > http://www.rcic.com/ click on "Virtual Conference Hall," > > ------------------------------------------- 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on "Virtual Conference Hall," ------------------------------------------- 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on "Virtual Conference Hall,"
