good morning group, has anyone tried to sumbit an application to ship into Malaysia thru Sirim QAS, for telecommuncations equipment? I'd like to know the process, I searched a few sites and came up empty. From what I have found, you need to apply with Sirim QAS, and pay a fee and also pay for labels once your approved. But I cant find what I need, to get the process started. one site noted, the importer is repsonsible for this. But I dont trust this. Does Sirim accept outside reports and NO in country testing? any information on this is much appreciated, Any information on costs and time would be nice. thnak you in advance, Richard,
From: owner-emc-p...@listserv.ieee.org [mailto:owner-emc-p...@listserv.ieee.org]On Behalf Of POWELL, DOUG Sent: Wednesday, August 11, 2004 10:24 AM To: Rich Nute; Ralph McDiarmid Cc: emc-p...@ieee.org Subject: RE: solid insulation vs coating Rich, Take a look at IEC 60664-3: 2003-02 "Insulation coordination for equipment with in low-voltage systems - Part 3: Use of coating, potting or moulding for protection against pollution." This standard covers the topic very well and is referenced by IEC 61010-1: 2nd Ed. 2001-02. I expect (or hope) more of the modern revisions to other safety standards will begin to reference this document as well. You will find that there are two types of coatings recognized by IEC 60664-3. One type simply provides pollution degree reduction and the other is considered solid insulation. The type that is solid insulation has a rigorous set of tests it must pass. So far, in my company, we have not achieved the second type because it is very difficult to provide a quality control check that assures proper application of the coating. Also, repair of PWBs becomes an issue. -doug From: owner-emc-p...@listserv.ieee.org [mailto:owner-emc-p...@listserv.ieee.org] On Behalf Of Rich Nute Sent: Tuesday, August 10, 2004 1:13 PM To: Ralph McDiarmid Cc: emc-p...@ieee.org Subject: Re: solid insulation vs coating http://www.ieee-pses.org/symposium http://www.emc2004.org/ Hi Ralph: > Why is conformal coating not considering solid insulation, but rather only > providing a reduction in pollution degree? If the coating were of > sufficient thickness and free of trapped air, then how can creepage or > clearance exist under it? Conformal coating MUST be considered solid insulation because it is a solid material between two conductors, and it must be an electrical insulator. A conformal coating necessarily prevents pollution >from accumulating on the conductors beneath the coating. As such, a conformal coating lengthens the path between two conductors on which pollution can accumulate. The pollution accumulates on the conformal coating instead of directly on the PCB. Clearances and creepages relate to air insulation. When two solid insulations butt up to each other, clearances and creepages continue to exist at the joint. A coating applied to a PWB does not automatically mean the joint is free of air and therefore would have no clearance or creepage. To be considered a continuous solid insulation, the construction of the joint between the two solid insulations must exclude air throughout the distance between the conductors. So, there are two factors, one being the construction of the joint, and two being the consistency of the construction of the joint throughout the joint. The construction of the joint must include a cement or similar mechanical adherence such as an amalgam. This would be evaluated by means of a peel strength test. Then, the cement or amalgam must be uniform throughout the area of the joint. This is much more difficult to evaluate. So, a simple coating does not necessarily conform to the construtional requirements of a contiguous solid insulation. Indeed, unless proven as contiguous, conformal coatings are treated as having air between the two solid insulations. > Some standards even consider encapsulation or potting for providing a > reduction in pollution degree, even where it provides void-free moulding > over the part. Isn't encapsulation the same as the moulding on a plastic > integrated circuit? Yes and no. Encapsulation or potting is evaluated the same way... the joints must exlude air and be contiguous. Not all encapsulations or potting processes exclude air in the joints between two solid insulations. The joint must be cemented, or the two materials must form an amalgam or equivalent at the joint. Best regards, Rich This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. IEEE PSES Main Website: http://www.ieee-pses.org/ To post a message send your e-mail to emc-p...@ieee.org Instructions for use of the list server: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: emc_p...@symbol.com 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.ieeecommunities.org/emc-pstc This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. IEEE PSES Main Website: http://www.ieee-pses.org/ To post a message send your e-mail to emc-p...@ieee.org Instructions for use of the list server: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: emc_p...@symbol.com 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.ieeecommunities.org/emc-pstc This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Scott Douglas emcp...@ptcnh.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.ieeecommunities.org/emc-pstc
