[PSES] UPDATE - Modified PC4 header to achieve voltage and elevation - How will UL look at this?

r side of pcb. * Mechanical strength reduced, * I will use side mounts that allow header to be screwed to the pcb. Thanks Chris Wells From: Chris Wells Sent: Saturday, October 26, 2019 3:36 PM To: 'EMC-PSTC@LISTSERV.IEEE.ORG' Subject: Terminal block pitch pcb cr

Re: [PSES] Terminal block pitch pcb creepage/clearance 400VL:N/G; 600/690 L:L CAT III, PD2, 3Km elevation

20:36, Chris Wells wrote: I want to monitor mains of polyphase power systems VA/VB/VC/VN using EN/UL 61010-1 Ratings: 400VL:N/G; 600/690 L:L CAT III, PD2, 3Km elevation Issue I see is to get the phase to phase spacings on my terminal block. Requirements in Annex K are 5.5mm at 2Km but

[PSES] Terminal block pitch pcb creepage/clearance 400VL:N/G; 600/690 L:L CAT III, PD2, 3Km elevation

Chris Wells - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to All emc-pstc postings are archived and searchable on the web at: http

[PSES] Modem EMC testing

have never evaluated a modem before. I assume there is a way to simulate a POTS interface and isolate my aux monitoring equipment . Any feedback would be appreciated. Chris Wells Eaton - This message is from the IEEE

Re: [PSES] Power distribution submetering application - Safety standard for Instrument Current Transformers on mains relative to IEC/EN/UL61010-1 3rd 61010-2-030?

Thanks John Besides IEC 60044-8. the general transformer standard IEC 61558-1, -2.4 and -2.6 I was also advised to consider EN61869-1:2009 - Instrument Transformers, General Requirements EN61869-2:2012 - Instrument Transformers, Additional Requirements for Current Transformers. Chris Wells

[PSES] Power distribution submetering application - Safety standard for Instrument Current Transformers on mains relative to IEC/EN/UL61010-1 3rd 61010-2-030?

as a separate independent component? Chris Wells Eaton - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to emc-p...@ieee.org All emc

[PSES] What is driving 600V control wire ratings in USA Low Voltage Power Distribution Gear?

limitation is not recognized like TC and the cables are big. For example serial asynch RS485 Modbus RTU to a meter, Belden has a 3074F I believe that is 600V TC rated and is pricey and the size of my index finger Your thoughts? Chris Wells Eaton Corp

Re: [PSES] Meaning of opposite polarity in IEC 61010-1 Ed. 3

Nic It appears that 61010-1 is finally becoming conscious of the differential relation ships in sourcing circuits. I think opposite is referring to single phase sources Line to Neutral in a Typical AC system or + to common (-) in a DC. So it is referring to the spacing's between the sourcing

Re: [PSES] CISPR 11 Question

Bob Yes I should have tried that approach. Thanks for pointing it out. I do have another opportunity in a few months. Chris Wells _ From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Bob Richards Sent: Saturday, June 16, 2012 3:45 PM To: EMC-PSTC

[PSES] Testing Modular rack mount designs - minimum configuration?

beasts are reduced to manageable test configurations and how you justify it would be appreciated. Regards Chris Wells Eaton Corporation - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post

Re: [PSES] What means do you use to exercise Ethernet telecom ports?

). This approach worked well for EMI testing since the transceiver was robust enough but I found that my transceiver was a major source of emissions during my emission testing. Can anyone suggest an emission quite FO/Cat5 transceiver that would behave for my testing? Thanks Chris Wells Eaton Corp

Re: 375MHz from 10/100Base-T

Jim - Interesting topic! Have you looked into the various sub circuits? Does the hardware have separate MAC and Net Phys? (common configuration) If yes then what is the interface? Plain vanila MII or ?? see link and the see also at the bottom...

Re: RF What-if (was: RE: Another Cancer Scare?)

if any of them have had similar expriences. Chris Wells From: Oscar Overton oover...@lexmark.com Chris, I appreciate you comments and also the additional information related to your experience. The additional data contributes to your assessment conclusions. Also, from your previous comment

Re: RF What-if (was: RE: Another Cancer Scare?)

with power being observant of other situations. Chris Wells From: Oscar Overton oover...@lexmark.com Chris, Until you can do this repeatedly and the results are the same, you have only demonstrated a coincidence. Oscar Overton Product Safety - This message is from the IEEE Product Safety

Re: RF What-if (was: RE: Another Cancer Scare?)

Shifting gears all the way down to 60Hz and over to the magnetic field exposure area. I had a set of high power, wire wound resistors in a bank to disipate alternating 10 to 20KW of power off a 3 phase 480V bus. It was a lame means to simulate a field oil pump load for the development of a

Re: Another Cancer Scare?

Fred - I would argue that you can see significant harmonics in comercial buildings in the USA. Single phase power supply loads without Power Factor Correction front ends can create 3rd harmonics ~ equal in size to the fundamental. The higher order harmonics dropping off in magnitude in a sinx/x

Re: Bonding to conductive plastic - best method?? - BEST SCREW

to the SS inserts - I will check pricing and availability of a self tapping style screw in insert. Thanks - I think I am getting closer Chris Wells Senior Design Engineer Cutler-Hammer Pittsburgh, Pa. USA 412 490 6862 christopherdwe...@eaton.com - Original Message - From: Robert Wilson

Re: Bonding to conductive plastic - best method??

fiberglass. - Original Message - From: Robert Wilson To: Chris Wells ; EMC-PSTC Discussion Group Sent: Monday, June 03, 2002 12:32 PM Subject: RE: Bonding to conductive plastic - best method?? The problem you are encountering is made somewhat more difficult by the very low

Masking - was: chassis bonding - star washers enough?

problems with masking. I have no issue with the electrical/mechanical principles But it seems that the appearance will be very poor and the effort to accomplish high. I suppose that is why plated surfaces are preferred.. What about conductive paint? Too expensive? Appearance? Chris Wells

chassis bonding - star washers enough?

welcome! Thanks in advance! Chris Wells Senior Design Engineer Cutler-Hammer christopherdwe...@eaton.com

Fw: Conductive Coatings/Conductive Plastic

an issue but controlable for medium volume usage of ~ 10K/year and simple designs. If the tooling is very expensive I would think twice. Chris Wells Senior Design Engineer Cutler-hammer Pittsburgh Pa. - Original Message - From: John Juhasz jjuh...@fiberoptions.com To: emc-p

Need Help on Inner PCB plane for RF shielding in isolated circuit

you could share would be appreciated!! Thank you in advance. Chris Wells Senior Design Engineer Cutler-Hammer Pittsburgh Pennsylvannia - USA christopherdwe...@eaton.com

FCC emission requirement history?

, and labeling would be appreciated. Thanks in advance! Chris Wells Senior Design Engineer Cutler-Hammer Pittsburgh Pa. well...@ch.etn.com cdwe...@stargate.net

Fw: CE test suite for computers

- Original Message - From: Chris Wells To: Tania Grant Sent: Saturday, August 18, 2001 10:54 PM Subject: Re: CE test suite for computers Jumping into the middle of this... In Europe there are a lot of older buildings with half sized neutrals relative to the supply phases

Re: EMI sniffer goggles

as different intensities of light. Chris Wells cdwe...@stargate.net ..- Original Message - From: Wan Juang Foo f...@np.edu.sg To: EMC-PSTC Discussion Group emc-p...@majordomo.ieee.org Sent: Tuesday, August 07, 2001 6:28 PM Subject: Re: EMI sniffer goggles I suppose that can be achieve

NEMA versus UL type - enviromental ratings

overlay vendors that have coordinated recipe of components/adhesive etc. that works with pollycarbonate from -40 to 60C and comply to UL types (NEMA) types 1, 12, 3, 3R, or 4? Thanks for any FB you can give ! Chris Wells Sen. Des Eng. Cutler-Hammer Pittsburgh Pa well...@ch.etn.com

Fw: Transformer Question

- Original Message - From: Wells, Christopher D well...@ch.etn.com To: 'Chris Wells' cdwe...@stargate.net Sent: Wednesday, April 25, 2001 9:19 AM Subject: RE: Transformer Question Tac Pham - Regarding transformer recognition. When I have designed a custom power supply like Ken has

EMC self Decleration - many models

in advance!! Chris Wells Senior Design Engineer Cutler-Hammer Pittsburh, Pa well...@ch.etn.com 412 490 6862

Save me from label hell with draw out design.

ideas to add clarity to this mess? I'm sure a number of you restle with this issue and have come up with something that works better keeping both marketing, the user and the UL inspector happy. Your comments would be most appreciated :-) Thanks in advance! Chris Wells Senior Design Eng

UL rec. needed on custom transformer ??? - thanks for the feed back

Message - From: Grant, Tania (Tania) tgr...@lucent.com To: 'Chris Wells' cdwe...@stargate.net; 'emc-pstc' emc-p...@ieee.org Sent: Wednesday, November 15, 2000 9:22 PM Subject: RE: UL rec. needed on custom transformer ??? Chris, Per your description, your Current Transformer is in a safety

UL rec. needed on custom transformer ???

the construction file but I do not see how I can get a split inspection with UL inspecting the CT at the vendor, with out this. Is there another way? Guidance on this topic would be most appreciated. Thank you Chris Wells Senior Des Eng. cdwe...@stargate.net Cutler-Hammer 412 490 6862

pollution degree 1? 2?

like environment. Am I missing something here? Do most PCB spacings get evaluated to pollution degree 2? in ITE? in Automation equipment like Programmable Logic Controllers ? Thanks . Chris Wells Senior Design Eng Cutler-Hammer Pittsburgh Pa well...@ch.etn.com Original Message