Re: [PSES] Voltage Rating vs Voltage Specification

All, Yes, the consultant or safety engineers dream/nightmare. We have to realize that the glass is half empty for most of the world and we have an ongoing opportunity to strike them across the knuckles with a ruler (as the nuns did in primary school) and begin the teaching

Re: [PSES] EU Certifications Required for Surge Protectors?

IEC SC 37A deals with surge protective devices, SPDs. Non-power SPDs (signal) are handled by SC 37A Working Group 4. WG 4 produced IEC 61643-21 Low voltage surge protective devices – Part 21: Surge protective devices connected to telecommunications and signalling networks – Performance

Re: [PSES] Votlage Rating vs Voltage Specificaion

Unfortunately this was a consulting job and the arrangements had already been made by the company in question.  I was there to help them through the findings of the PDR. Doug

Re: [PSES] EU Certifications Required for Surge PRotectors?

Dunno, as have just used the standards referenced in annex G of 62368-1, or whatever component requirements that would be scoped per the various end-use equipment standards. Otherwise, perhaps materials and component and test requirements per EN62305-x or EN61643-x? Brian From: Scott Douglas

Re: [PSES] ESD Table Top Testing Bench with IEC 61000-4-2

I remember dealing with a manager years ago who made layout decisions based on esthetics. I wouldn't want to deal with that situation again. I would tell your local Feng Shue expert to butt out and leave the lab equipment (and the ESD tables are lab equipment) design to the EMC experts. IEC

Re: [PSES] ESD Table Top Testing Bench with IEC 61000-4-2

It is very likely that the capacitance to the ground plane would be much higher with the steel-legged table. Are you really serious about feng shui? With best wishes DESIGN IT IN! OOO - Own Opinions Only www.jmwa.demon.co.uk J M Woodgate and Associates Rayleigh

[PSES] EU Certifications Required for Surge PRotectors?

Hello All, We have three products that we sell in USA. We are looking at getting these approved for sale in the EU. Our famous certification house says they do not create CB Reports for this kind of product. We are unfamiliar with any type of standards in the ROW for these products. So, we are

[PSES] ESD Table Top Testing Bench with IEC 61000-4-2

Dear Colleagues, We made a decision to renovate our laboratory with new lab benches. This has led to a bit of a conundrum with our ESD benches. Our local Feng Shui expert has proclaimed that it would not do to have all new lab benches except for our old ESD wooden benches. The issue we keep

Re: [PSES] Votlage Rating vs Voltage Specificaion

“As a result the agency engineer wanted to apply the ±10% rule to the rating label voltage…” Never submit a product to a certification house that you have not tested and evaluated for all the requirements. You should not have any failures at the certification house (and the

Re: [PSES] Votlage Rating vs Voltage Specificaion

Hi Doug: “…had a design engineer who took those numbers from the datasheet and transcribed them directly to the rating label of his product.” This is the problem: The safety guy didn’t do his job! (I presume it wasn’t you!) I prefer nominal input voltage rating numbers, not

Re: [PSES] Voltage Rating vs Voltage Specification

As Dave said, this is “age old problem” that we also faced at HP Bristol in the 1980s when we built peripherals that had to operate across the World – and that meant from 100V 50 & 60Hz in Japan and up to 240V 50Hz for the UK and a few other places, AND +/- to cope with the relevant required

Re: [PSES] Votlage Rating vs Voltage Specificaion

There is a vocabulary issue here. The IEC defines 'rated' as [simplified] 'the value stated by the manufacturer'. So for the PSU manufacturer, 85 V and 264 V are indeed 'rated' values. But of course you are right; the product should have rated values of [probably] 100 V to 240 V. It's got to be