I've been trying to solve this one myself. I work with one pair of standards (UL458 / CSA107.1) where they specifically say that opening the branch circuit protection is acceptable during component fault testing, but NOT during short circuit tests done for the purposes of validating inadequate trace spacings (an easement offered in the standards in some situations). I've always been puzzled why we can't rely on branch circuit protection for both situations, but neither agency has been able to explain the difference to me. Jim Eichner, P.Eng. Regulatory Compliance Manager Xantrex Technology Inc. phone: (604) 422-2546 fax: (604) 420-1591 e-mail: jim.eich...@xantrex.com web: www.xantrex.com Confidentiality Notice: This email message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message.
From: peter merguerian [mailto:pmerguerian2...@yahoo.com] Sent: Tuesday, January 28, 2003 11:54 AM To: emc-p...@majordomo.ieee.org Subject: Circuit Breaker Tripping Dring Fault Tests Dear All, For safety, it is not clear from the standards whether the main branch circuit breaker tripping during fault conditions is an acceptable result. I see no reason why this should not be acceptable. What is your view? Some third party labs find it acceptable and others do not. Anyone can lead me to some inernational decisions regarding this issue? Thanks, Peter _____ Do you Yahoo!? Yahoo! Mail <http://rd.yahoo.com/mail/mailsig/*http://mailplus.yahoo.com> Plus - Powerful. Affordable. Sign up < ttp://rd.yahoo.com/mail/mailsig/*http://mailplus.yahoo.com> now
