RE: GR-1089 Issue 4 and Surge on Ethernet

David is correct, it is secondary protection. However, it does not cause you to loose the exemption from the metallic test in your case. To loose the exemption, the secondary protection component to ground would have to be on the opposite side of the transformer than the IC (surged side). That

RE: Regulatory Compliance stifles innovation?

In some ways, regulatory compliance can encourage innovation. In other ways, product regulatory compliance can stifle innovation. EMC standards focus on the end-result, namely emissions that cannot exceed specified limits. There are no requirements on how to achieve this goal. Safety standards d

Re: Regulatory Compliance stifles innovation?

You are correct that the odds refer to the population as a whole. That was part of my original point regarding the safety of riding horses. The risk may seem small because it happens rarely in the general population, but the risk is high for the exposed group of horse riders. (For the year used

Re: Regulatory Compliance stifles innovation?

Ted, While I whole heartedly agree with everything that you write here, I do take exception to the implications made in the referenced table. Unless I'm mistaken, the odds are related to the "whole" population and not just the "exposed" population. By this I mean that virtually everyone drives o

RE: GR-1089 Issue 4 and Surge on Ethernet

David, As that represents a path to Ground, then I would say that the answer is *Yes*. Keep in mind that the term "Ground" means "C.O. Ground" when referencing this topic. Thx, Joe ~~ Joe Finlayson Tel: (508) 357-8273 Fax: (508) 357-8289 Email: joefi

RE: GR-1089 Issue 4 and Surge on Ethernet

Is a diode to ground on lines between the IC and the transformer considered secondary protection? Thanks, David David Gelfand Conformity Specialist / Specialiste de conformité 616 Curé-Boivin Boisbriand, Qc, Canada J7G 2A7 tel: (450)437-4661x2449 Fax: (450)437-8053 david.gelf...@ca.kontron.com

RE: Regulatory Compliance stifles innovation?

Ted, I'm glad you brought up the idea of frequency allocations. It reminded me of an innovation a few years ago over which there was some argument. That being spread spectrum applications or dithering to reduce EMC energy. This is a perfect example of the point I am trying to make. I have a f

Re: GR-1089 Issue 4 and Surge on Ethernet

It has been a long time since I worked with lighting design and simulation of circuits back at Bell Labs, but I remember that lightning surges are for the most part common mode. The common mode surges can be converted to metallic when only one of two (tip or ring) protectors on a phone line fir

Re: 63A conducted emission/immunity testing in the UK

Regarding LISNs only. If that 415 V is line-to-line, that means line-to-ground is around 240 V, right? Check the Solar catalog at their website, or I will send you the pertinent portions I long ago downloaded for frequent usage. http://www.solar-emc.com/ > From: "Gordon,Ian" > Date: Wed, 29 No

Pink Noise Generator

Does anyone on the forum know where I could buy a used Friborg Pink Noise Generator 2780 ? I would be most grateful. Thanks Matthew Matthew Larkin Product Safety Specialist Compliance Services Group TÜV Product Service Ltd Octagon House - Concorde Way - Segensworth North - Fareham -

RE: Regulatory Compliance stifles innovation?

Having worked for TUV and now working with the Agencies on the other side of the fence I have found them to be very reasonable in using judgment with regards to when flame retardant materials are required. If a part is a small part or is located in an area where they would not be subjected to a fla

63A conducted emission/immunity testing in the UK

All Can anyone suggest a UK supplier/manufacturer of the following, suitable for connection to a 3 phase (415V) supply? Mains LISN Mains CDN Fast transient coupler and Surge tester Thanks Ian Gordon *** The information conta

Re: Regulatory Compliance stifles innovation?

I don't think that the mind set regarding risk has changed. It is basically the same as it has always been; people are poor judges of risk. What has changed is the legal landscape. Americans in particular seem to be unwilling to accept incidents as accidents. Somebody must be at fault, and each

THANKS Re: shorting the mains prohibited - Help

By the way, I want to thank everyone for their input on my posting under the above subject several weeks ago. Your input was a great help in organizing my response to the proposed idea. The interest in the proposal appears to have gone to zero. Thanks again, Gregory H. McClure Lexmark Product Sa

RE: Regulatory Compliance stifles innovation?

Rich, I have been trying to think of an example where the standard (IEC 60950-1:2001) requires a flame retarded material where no possibility of flame exists and cannot come up with one. Unless of course you are referring to the use of HB minimum materials in IT equipment. I guess HB is considered

laser for restoration

Hi everybody, which standard should I apply to fulfil LVD requirements (electrical safety) for a laser device used for restoration and cleaning of works of art and paintings? Thanks in advance, Paolo Peruzzi Regulatory Engineer El.En. S.p.A. Via Baldanzese, 17 50041 Calenzano (FI) Italy Tel.

GR-1089 Issue 4 and Surge on Ethernet

Dear All, The Issue 4 of GR-1089 contains now (from my understanding) an exemption for Ethernet from the surge test 1 in Table 4-5 or 4-6 (metallic surge). Am I right with this interpretation? Is there any more information available on the history of the metallic surge test than the bit I cont

Environmental-friendly Use Period per China RoHS

Dear Members, Several members have expressed their concerns in regard to the environmental-friendly use period. Please find below the Q&A for your information. An official Chinese version of the complete Q&A can be located at http://w

Regulatory Compliance stifles innovation?

All, I've heard it said that Regulatory Compliance stifles innovation and sometimes even makes it impossible to do the things we want. The constraints that are imposed for Safety and EMC seem prevent our highly talented engineering/design community from doing what they need to achieve leading-edg