Text item: your latest CB bulletin. I believe 89A covers the last set of deviations. 45V SELV has been harmonized to 60vdc in korea. Japan, however is still 45vdc, will be harmonized in next few years.
------------------------------------------------------------ Craig Britland OPSD Intel Corporation Product Regulations 2800 Center Drive Tel: 253 371 9108 DuPont, WA 98327 Fax: 253 371 9104 MS DP2-303 e-mail: [email protected] ------------------------------------------------------------ ______________________________ Reply Separator _________________________________ Subject: Korean safety/deviations from IEC 950 Author: [email protected] at SMTPGATE List-Post: [email protected] Date: 02/05/98 03:41 PM Hello group, I have two questions: 1. Where can I get ahold of copies of Korean deviations to IEC 950? 2. I have just learned that one deviation is that 45 VDC is the cutoff voltage for SELV. How does this impact the design of centralized dc powered equipment operating at -48 VDC? The way I've figured it, it has the following consequences: - because input voltages are now considered hazardous secondary, the insulation requirements between input and SELV circuits are BASIC, instead of OPERATIONAL as they would be if the line is drawn at the standard 60 VDC. - creepage distances remain the same, but clearances must be determined from the B/S column of Table 3, IEC 950, instead of the Op column as before. - and most importantly, ***clause 5.4.4 will no longer be applicable***. Important because compliance options which were available before no longer are. If either options b) or c) in 5.4.4 were selected as design courses, instead of meeting creepage/clearance, it seems like the Korean deviation renders the design non-compliant. Any thoughts? thanks! Mark ------------------------------------------------------------------ Mark Ortlieb | Product Safety Engr. | QUALCOMM Incorporated QUALCOMM Incorporated | 6455 Lusk Blvd. Tel: 619-658-3208 | San Diego CA 92121, USA Fax: 619-651-1997 | <mailto:[email protected]> | <http://www.qualcomm.com> ------------------------------------------------------------------ Text item: External Message Header The following mail header is for administrative use and may be ignored unless there are problems. ***IF THERE ARE PROBLEMS SAVE THESE HEADERS***. X-Moderator-Address: [email protected] X-Info: [Un]Subscribe requests to [email protected] X-Info: Help requests to [email protected] X-Listname: emc-pstc X-Resent-To: Multiple Recipients <[email protected]> Reply-To: Mark Ortlieb <[email protected]> Precedence: bulk Sender: [email protected] Subject: Korean safety/deviations from IEC 950 From: Mark Ortlieb <[email protected]> To: [email protected] List-Post: [email protected] Date: Thu, 5 Feb 1998 15:41:44 -0800 Content-Type: text/plain; charset="us-ascii" Mime-Version: 1.0 Message-Id: <v03130306b0fff84eaab2@[129.46.151.110]> X-Sender: [email protected] Received: (from daemon@localhost) by ruebert.ieee.org (8.8.8/8.8.8) id SAA24845 for emc-pstc-list; Thu, 5 Feb 1998 18:39:46 -0500 (EST) Received: from ruebert.ieee.org (ruebert.ieee.org [199.172.136.3]) by ganymede.or.intel.com (8.8.6/8.8.5) with ESMTP id SAA08312; Thu, 5 Feb 1998 18:14:31 -0800 (PST) Received: from ganymede.or.intel.com (ganymede.or.intel.com [134.134.248.3]) by fmmail.fm.intel.com (8.8.5/8.7.3) with ESMTP id SAA23440; Thu, 5 Feb 1998 18:07: 02 -0800 (PST) Return-Path: [email protected]
