Hello all, Would anyone know of a relay suitable for the following application:
The circuit is a 100-240VAC ac feed fail changeover, ie one output with an A and B ac feed. The coil would be powered from 48VDC derived from either ac feed and the contact rating would need to be in the range 15 to 30A. The main design challenge tripping up the designer - and hence my involvement - is in maintaining double/reinforced isolation between the A and B inputs. The reason being, if the power cord is removed from one of the ac feed inlets, then there the is exposed accessible metal pins of the inlet that must be double insulated from the other ac feed. I believe that this scenario is reasonably common, from talking over with our electrical safety test lab, but the solution of using a single relay as the changeover element may not be viable. Please reply directly to me rather to the group as whole unless you feel there's merit in posting your response. Thanks. Best regards, Bruce Maule Bruce Maule, Approvals Engineer Allied Telesyn Research Ltd Courier: 27 Nazareth Ave, Middleton, 8002, Christchurch, NZ Post: PO Box 8011, Riccarton, 8034, Christchurch, NZ Phone: +64-3-339-3000, +64-3-339-9242(DDI), Fax: +64-3-339-3002 http://www.alliedtelesyn.co.nz/ NOTICE: This message contains privileged and confidential information intended only for the use of the addressee named above. If you are not the intended recipient of this message you are hereby notified that you must not disseminate, copy or take any action in reliance on it. If you have received this message in error please notify Allied Telesyn Research Ltd immediately. Any views expressed in this message are those of the individual sender, except where the sender has the authority to issue and specifically states them to be the views of Allied Telesyn Research. 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: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
