Dear All, For a 100-240 V ac ITE system with two power inlets (one for the main power and the other for redundancy in case of failure of the main power); what is the best engineering and safety acceptable design method for switching between the two circuits to ensure that disconnection of one of the inlets is not going to cause an electrical hazard - someone may touch the pins?
By using approved relays, can solve the problem but can be very expensive. Relays are also not approved for a 100-240 V range; they are either 120 V rated for the US and 230V rated for Europe. By using SCRs, I am not sure a test agency will accept "silicon" unless the package is approved. Such approved SCR switches are widely used in UPS systems but are very expensive. Can you share your experiences with "redundant power input" designs and the way test agencies interpret the 950 requirements for such designs. This e-mail message may contain privileged or confidential information. If you are not the intended recipient, you may not disclose, use, disseminate, distribute, copy or rely upon this message or attachment in any way. If you received this e-mail message in error, please return by forwarding the message and its attachments to the sender. PETER S. MERGUERIAN Technical Director I.T.L. (Product Testing) Ltd. 26 Hacharoshet St., POB 211 Or Yehuda 60251, Israel Tel: + 972-(0)3-5339022 Fax: + 972-(0)3-5339019 Mobile: + 972-(0)54-838175 http://www.itl.co.il http://www.i-spec.com ------------------------------------------- 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] All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
