[PSES] EN 60950-1 INaccessible parts

Anyone aware of what seems as a typo to me in EN 60950-1:2006 in par 5.3.4 it say that clearance and creepage distances for functional isolation must be respected for INaccessible parts ... Whats the sense of guarding the isolation to not accessible parts At the same time,

Re: [PSES] EN 60950-1 INaccessible parts

Hi Gert, Remember that clause 5.3.4 deals with 'functional insulation' only. It talks about the insulation between a SECONDARY CIRCUIT and an 'inaccessible' conductive part that is earthed for functional reasons. There needs to be some insulation where the inaccessible conductive part is

Re: [PSES] EN 60950-1 INaccessible parts

Hi Kevin, Thanks, This means that for a PC (secondary GND is Earthed) all SECONDARY circuits not GND must meet 1. functional clearance and creepage to GND as per table 2M and or 2N, or 2. withstand the 500 Vac (or higher) dielectrical test, or 3. be short circuit safe

[PSES] 120VAC in Europe?

Any country in EU who use 120VAC? I don't think so, but want to check with you guys .. #Amund - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send

Re: [PSES] 120VAC in Europe?

Officialy not, but some old houses still have 130VAC Best regards, Kris Carpentier From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Amund Westin Sent: donderdag 31 mei 2012 12:08 To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: 120VAC in Europe? Any country in EU who use 120VAC? I

Re: [PSES] 120VAC in Europe?

110V supplied from a centre tapped to earth isolating transformer is commonly used on construction and industrial sites in the UK. Nick. On 31 May 2012, at 11:07, Amund Westin wrote: Any country in EU who use 120VAC? I don’t think so, but want to check with you guys …. #Amund -

[PSES] SV: 120VAC in Europe?

So, for CE marking, 110-120VAC should be tested in addition to 230VAC? The EUT has a switch to choose 120VAC or 230VAC supply voltage. #Amund Fra: Nick Williams [mailto:nick.willi...@conformance.co.uk] Sendt: 31. mai 2012 12:18 Til: amund Kopi: EMC-PSTC@LISTSERV.IEEE.ORG Emne: Re:

Re: [PSES] 120VAC in Europe?

Only for equipment intended for the industrial/construction sites where this voltage are used (mainly lighting and portable tools). Nick. On 31 May 2012, at 11:25, Amund Westin wrote: So, for CE marking, 110-120VAC should be tested in addition to 230VAC? The EUT has a switch to choose

Re: [PSES] SV: 120VAC in Europe?

Amund Depends on Directive - Medical Devices covered by EN60601 have to have some tests done at both voltages. Regards Charlie From: Amund Westin [mailto:am...@westin-emission.no] Sent: 31 May 2012 11:26 To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] SV: 120VAC in Europe? So, for CE marking,

[PSES] SV: [PSES] SV: 120VAC in Europe?

Charlie RTTE here . EMC, radio and LVD tests will be carried out, but we have only planned to do with EUT in 230VAC mode, since we're only doing CE mark for this EUT. #Amund Fra: Charlie Blackham [mailto:char...@sulisconsultants.com] Sendt: 31. mai 2012 12:36 Til: amund;

Re: [PSES] EN 60950-1 INaccessible parts

Gert, It would seem a motherboard is SELV circuitry and not subject to functional spacings or a dielectric test. Or am I misunderstanding your application? Doug Douglas E Powell doug...@gmail.com http://www.linkedin.com/in/dougp01 Sent from my Verizon Wireless BlackBerry -Original

Re: [PSES] EN 60950-1 INaccessible parts

That is what I thought first too. But that is not true. If there are earthed conductors on board (not GND, earthed) connected to inaccessible part(s) (so accessible also I presume) clearances are required to table 2N , for the best conditions that is 0.2 mm (all ic packages comply). This

[PSES] Fwd: ISO questionnaire

Colleagues, ISO TC199 Safety of Machinery is working on revisions to ISO 13849-1 and the merger of this standard with IEC 62061. The Joint Working Group is looking for feedback from users of these and other functional safety standards on how they use these standards and the challenges they

Re: [PSES] 120VAC in Europe?

And don't forget that there are still quite a lot of US military bases around Europe where 120Vac may be available - Possibly no CE either! J John From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Amund Westin Sent: 31 May 2012 11:08 To: EMC-PSTC@LISTSERV.IEEE.ORG Subject:

[PSES] Troubleshooting Kit (Part 1) Published

Hi All, I just published a few details on an EMC troubleshooting kit I use. Part 1 provides some detail on the emission tools I use. Part 2 (to be published later) will describe a few immunity tools. I'd appreciate any other thoughts or ideas you might have on tools you might use for

Re: [PSES] Troubleshooting Kit (Part 1) Published

Hi Ken, The kit you have described is very useful for EMC road warriors. Thanks you. You have captured and organized most every tool that an EMC engineer needs for everyday emissions troubleshooting in this article. I have used all these tools for troubleshooting, and plan on making a couple of

Re: [PSES] Slip Rings and EMI

We've had an intermittent one recently during development. Running Gigabit Ethernet across it and USB too.  Otherwise it runs ok. From: John Woodgate j...@jmwa.demon.co.uk To: EMC-PSTC@LISTSERV.IEEE.ORG Sent: Thursday, May 3, 2012 1:35 PM Subject: Re: Slip