Re: [PSES] HiPot Testing of 3-Phase PSU Question

There must be a metal clip to disconnect GDT during hipot. Normally it is closed to input connector. Other option is that manufacturer performs hipot on PCB with full value and on complete unit (in enclosure) with reduced value. Anyhow, I agree with Ralph. As PSU is tested separately, you

[PSES] requirements for SST

Dear experts, I would need your help. Our client is designing modular SST (Solid State Transformer). This device will generate 800VDC out of middle voltage mains (13800V L-L). The unit will be placed outside the building and outout of the unit will supply equipment in data centers (through

Re: [PSES] IEC 62368-1: To understand chapter 5.4.11

by someone other then 12V supply. Best regards Piotr Galka W dniu 2024-05-07 o 19:49, Boštjan Glavič pisze: > Hi Piotr > > USB circuit is internal circuit. There are no transients expected on USB. > Clause 5.4.11 is not applicable for power supply with USB output. > > Pair

Re: [PSES] IEC 62368-1: To understand chapter 5.4.11

Hi Piotr USB circuit is internal circuit. There are no transients expected on USB. Clause 5.4.11 is not applicable for power supply with USB output. Paired conductor is a telecommunication network that we had in old times (analogue network, ISDN,...). I hope this helps. If you need more info,

Re: [PSES] IEC 62368-1: clearance and creepage

Hi John After resistor you might have ES1 circuit and safety distances do not apply. However resistor need to comply with special requirements of Annex G. See table 4 for ES1 limit for DC current. I think it is 2mA. You have to simulate short accross resistor unles resistor comply with searate

Re: [PSES] I would like to hear your thoughts please

Hi Derek It is common practice within the labs to find worse case configuration and test it. At least we are doing it in such a way. You can find some guidlines how to form families on IECEE page, but I think your case is different. The best way is to test one fully populated product. Best

Re: [PSES] Y-capacitor body material - considered to be insulating?

There is a CTL decision DSH 738 about insulation of body of Y capacitor. If you are talking about round coated blue Y caps, for Y1 type coated enclosure can be considered as reinforced insulation except in an area near leg outlet. CTL considered that coating near leg can break during placement

Re: [PSES] IEC 62368-3

Hi Peter That is correct. We discussed that also on TC108 and confirmed. Standard 62368-3 will be replaced by 63315 in the future. Best regards Bostjan Glavic SIQ Poslano iz Outlook za Android Od: peterh...@aol.com

Re: [PSES] Products requiring dielectric voltage withstand test on RJ45 and XLR sockets

Hello Chuck, Typical issue with reading the standard. Standard IEC 62368-1 3rd Ed only defines routine tests on some components, where there is a reference to routine tests (e.g. transformer, optocoupler,... - search for reference to 5.4.9.2). Complete unit shall be tested in production based

Re: [PSES] SV: [PSES] EN 62368-1 : 2014

ysg> From: Amund Westin Sent: Wednesday, November 1, 2023 12:07:05 PM To: Boštjan Glavič ; EMC-PSTC@LISTSERV.IEEE.ORG Subject: SV: [PSES] SV: [PSES] EN 62368-1 : 2014 Thanks Boštjan Have I understood correctly, that EN62368-1:2014 will be valid for a minimum of

Re: [PSES] SV: [PSES] EN 62368-1 : 2014

regards, Boštjan Boštjan Glavič Vodja laboratorija za elektroniko / Head of Laboratory Varnost in elektromagnetika / Safety and Electromagnetics SIQ Ljubljana, Mašera-Spasićeva ulica 10, SI-1000 Ljubljana, Slovenija T: +386 1 4778 265 M: +386 41 391 283 bostjan.gla...@siq.si<mailto:bostjan.

Re: [PSES] [EXTERNAL] RE: Clearances >30 kHz

julij 26, 2023 10:43:29 pop. Za: Boštjan Glavič Kp: EMC-PSTC@LISTSERV.IEEE.ORG Zadeva: RE: [EXTERNAL] RE: Clearances >30 kHz Hello Boštjan, Appreciate your reply. I have since learned that Table 10 and Table 11 are for the Working Voltages. Table 14 is what you mentioned, Withstand Voltag

Re: [PSES] Clearances >30 kHz

Dear Ryan, Table 10 - input is your temporary overvoltage. Normally 2000Vpk for mains voltages up to 250Vac Table 11 - input is your working voltage Table 14 - input is your transient voltage - defined by OVC (for OVC II 2500Vpk). So table 11 brings you very low value and normally table 10 and

[PSES] Foreign Object Detection for industrial charger

group that develops UL 1564 or CSA 107.2? And we are talking about industrial charger, not EV charger. Thank you for your support. Best regards, Boštjan Glavič SIQ - This message is from the IEEE Product Safety Engineering

Re: [PSES] Compliant needle-flame test material vs V-0 material

Hello Scott I do not understand. If you have a product intended for connection to mains with available power less than 4000VA, V-0 material for fire enclosure is sufficient without any additional testing. Needle flame is verification test and cannot be compared to flammability rating test. So

Re: [PSES] [EXTERNAL] Re: [PSES] Low Voltage connectors called out on CCL

(flammable part of connector) less than 4g, they could ignore it. Best regards, Boštjan Glavič SIQ Ljubljana www.siq.si<http://www.siq.si> From: Ryan Jazz Sent: Friday, April 7, 2023 1:56 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] [EXTERNAL] Re: [PSES] Low Voltage connectors call

Re: [PSES] Multiple electrical power sources

Hi Steve, Below is link to official ISO symbol for multiple power source. https://www.iso.org/obp/ui/#iec:grs:60417:6172 Best regards, Boštjan From: Richard Nute Sent: Friday, April 7, 2023 2:15 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Multiple electrical power sources CAUTION:

[PSES] protective earthing terminal

Dear experts, What are your experiences about protective earthing terminal according IEC 62368-1? Unit provides 2 earthing terminals. One as a stud/bolt directly on the enclosure. This provides reliable connection to PE and fulfils all requirements of the standard. Second one on the input

Re: [PSES] X-Caps after Diode Bridge

Brian Use of X cap after bridge rectifier is not required. There exist OSM decision that clarifies this. Y caps are required in complete primary circuit towards PE. I hope this helps. Best regards Boštjan Glavič SIQ Poslano iz Outlook za Android<https://aka.ms/AAb9

[PSES] powder coating used as insulation

Dear experts, Does anyone has expeience about powder coating used as insulation? For example, powder coated bus-bars do not require additional spacings for basic insulation. I found one article below, but there are no details.

Re: [PSES] Clearance components

is acceptable, maybe if it is small part (<4g) or it passes fault condition or… Clause 6.4 is very extensive and gives a lot of options. Best regards, Boštjan Glavič SIQ From: Amund Westin Sent: Thursday, October 27, 2022 7:14 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] Clearance compone

Re: [PSES] IEC 62368-1 ES3/PS3 cold impact test

Hi Christopher, This is applicable for outdoor product. IP test follows cold impact test. Best regards, Boštjan From: Don Gies <0e5e843b011c-dmarc-requ...@listserv.ieee.org> Sent: Friday, October 21, 2022 2:04 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] IEC 62368-1 ES3/PS3 cold

[PSES] pressure vesel and Annex G requirement of UL 61010-1

Dear Experts I hope someone can help me with requirements of IEC 61010-1, more precisely with requirements of UL 61010-1. Pressure vesel is part of the unit which needs to be certified to IEC 61010-1 and also national differences for USA/CAN. There is high presure vessel with volume 40 Liter,

Re: [PSES] EN 62368-1 Ed 3 2020 + A11 : 2020 for GPSD

Hi Dan Are you looking for this? Best regards Bostjan SIQ Ljubljana https://ec.europa.eu/docsroom/documents/43968/attachments/1/translations/en/renditions/native Dobite Outlook za Android From: Dan Roman

Re: [PSES] IEC 60950: Which countries have not accepted IEC 62368-1, but still accepts IEC 60950?

Hi Richard, China, Taiwan. Some countries still accept IEC 60950-1, like Mexico for NOM approval. Best regards, Bostjan SIQ Ljubljana From: Richard Georgerian Sent: Thursday, June 9, 2022 5:41 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] IEC 60950: Which countries have not accepted IEC

[PSES] CSA C22.2 N0. 107.2

Dear experts, Is there anyone familiar with above mentioned standard? We are struggling with requirements for clearance and creepage distances. Specially how to read clause 4.17.5, which is alternative method for distances. Original distances are enormous and almost impossible to be fulfilled

Re: [PSES] Medical Device Leakage Current Production Line Test Setup

Dear Savino Please check specs of your AC programmable source if output is isolated (floating) . Normally it is not. Therefore additional isolation transformer is needed. Best regards Bostjan SIQ Ljubljana Get Outlook za Android Od:

Re: [PSES] dow date for EN 62368-1:2014 ?

oštjan, Your response is very helpful. If EN 62368-1:2020+A11:2020 is listed in OJEU in December 2022, do you think they will delay the DoW date for EN 62368-1:2014 until 12 or 24 months after Jan 06 2023? Is there a rule or a precedent that the Commission will delay it? Best regards, Doug F

Re: [PSES] dow date for EN 62368-1:2014 ?

Hi Doug, As there is no successor of EN 62368-1:2014 listed in OJEU, there is no DoW for this one. Date of Cessation in your standard is is for Cenelec (standardization) purpose only. So EN 62368-1:2014 will continue to be harmonized standard after Jan 06 2023. Best regards, Boštjan

Re: [PSES] Creepage and clearance requirements

Hi Amund, If plastic enclosure is made by 2 parts, you need to consider safety distances among the joint between two parts (from internal primary part through joint to external accessible part). If you use screws to fix enclosure, check distance from primary circuit to screw. Don’t forget on

[PSES] UL1564 - standard for industrial battery chargers

Dear all, Is there anyone familiar with standard UL1564? We are looking at requirement for Strength and rigidty and we cannot figure out what means single-circuit industrial truck battery charger. There is no such definition in the standard. Normally battery chargers have AC input, control

[PSES] Fwd: [PSES] Determination of Maximum transient voltage on naval ships

Forgot to put list on recipients. Dobite Outlook za Android<https://aka.ms/ghei36> ____ Od: Boštjan Glavič Poslano: sreda, 3. marec 2021 20:15 Za: ri...@ieee.org Zadeva: Re: [PSES] Determination of Maximum transient voltage on naval ships Hi Charlie Ta

Re: [PSES] UL840 and required clearances

of extremely high working voltage. Best regards Boštjan Dobite Outlook za Android<https://aka.ms/ghei36> From: Scott Aldous Sent: Monday, October 12, 2020 6:46:51 PM To: Boštjan Glavič Cc: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] UL840 and re

[PSES] UL840 and required clearances

Dear experts, I hope you can help me with determination of required clearances. Product is intended for connection to 3P 480V, 60Hz system, OVCIII. After Input EMI filter (with SPD) and rectifier, unit has a resonant circuit which generates high voltages, up to 2300Vpk towards ground (PE).

[PSES] UL840 and required clearances

Dear experts, I hope you can help me with determination of required clearances. Product is intended for connection to 3P 480V, 60Hz system, OVCIII. After Input EMI filter (with SPD) and rectifier, unit has a resonant circuit which generates high voltages, up to 2300Vpk towards ground (PE).

[PSES] marking of rated voltages

Dear colleagues, I am struggling with correct marking of rating on the product. How would you mark your product when connected to : 3 phase star system (with Neutral) and/or 3 phase delta system and/or 1 phase system Standard is IEC 62368-1 – table F.2 Some examples that I have in mind:

Re: [PSES] 62368-1 Section 6.4.8 Flammability Confusion

As mentioned by Carl, V-0 is more stringent requirement than V-1. Where is confusion? Best regards, Boštjan From: John Woodgate Sent: Thursday, May 7, 2020 12:06 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] 62368-1 Section 6.4.8 Flammability Confusion Can you please share the

Re: [PSES] Touch temperature levels

Dear Kris, For accessible parts (TS classification) we only refer to temperature at 25°C. Not required to recalculate measured temperatures to Tma. For your example, you should record result 77°C @ 25°C ambient. We know that it is different than in IEC 60950-1. This has been discussed many

Re: [PSES] HV relay

Dear all Thank you for your valuable feedbacks. I have now enough arguments for customer. Best regards Bostjan From: Richard Nute Sent: Tuesday, November 26, 2019 6:41:05 AM To: 'Boštjan Glavič' ; EMC-PSTC@LISTSERV.IEEE.ORG Subject: RE: [PSES] HV relay Dear

[PSES] HV relay

Dear experts, Is anyone familiar with requirements for HV relay in vacuum? Are clearances and creepage distances between contacts applicable for such relay? Thank you for your support. Best regards, BOštjan - This message is

Re: [PSES] fire enclosure requirements for small Lithium battery

Hi Rich, All mobile phones constructed in such a way. Enclosure made of HB. Best regards Bostjan On Mon, Sep 30, 2019 at 7:52 PM +0200, "Richard Nute" mailto:ri...@bendbroadband.com>> wrote: “Many manufacturers consider outer tape around battery, that's meet min. V-1, as fire enclosure.”

Re: [PSES] IEC 62368-1 enclosure requirements for small Lithium battery

Hi Charilie, I believe 6,4W is maximum power on output of the battery (electronically protected) and therefore your supplied product does not need a fire enclosure. However internally inside the battery you have high energy and lithium battery is considered as a source of fire, therefore fire

Re: [PSES] Does anyone make this filter?

Dear all, Just one comment to use of such filter. Most of the filters are approved up to 2000m, what cannot be seen from the datasheet. If you design a product for altitude above 2000m, additional investigation of the filter is required. This is sometimes hard task. Best regards, Boštjan

Re: [PSES] Product Standards for Aircon Systems

Dear all, I have been told about problem with big chillers. So far standard in US was UL1995 but it will be replaced by UL 60335-2-40 (I think in 2021 new standard becomes mandatory). The problem is that big chillers cannot meet 3,5mA leakage current criteria. Any idea? Best regards, Bostjan

Re: [PSES] IEC 62368-1 3ed, Final Draft International Standard (FDIS)

Hi Vincent, See below my answers. I hope it helps. Best regards, Bostjan From: Vincent Lee [mailto:08e6c8d35910-dmarc-requ...@ieee.org] Sent: Sunday, March 18, 2018 8:25 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] IEC 62368-1 3ed, Final Draft International Standard (FDIS) Hi all,

Re: [PSES] Isolation Transformer & Class III electrical protection

Hi Vincent, 1) Class III definition is only applicable to complete product and no to output or other circuitry. You can have a class III product what means that it is supplied by SELV voltages and that there are internally no voltages above SELV limits generated. Laptop adapter cannot be

Re: [PSES] IEC/EN 62368-1

Hi Jim, 1) Yes, this rule/exception is also applicable for internal power supplies. The duration of transition period depends on voting result of circulated document (amendment to EN 62368-1:2014). 2) EN 60950-1 also has a requirements that symbols need to comply with IEC 60417

Re: [PSES] Safe powering 12V doorlock

[mailto:piotr.ga...@micromade.pl] Sent: Thursday, November 23, 2017 1:25 PM To: Boštjan Glavič <bostjan.gla...@siq.si>; EMC-PSTC <emc-pstc@listserv.ieee.org> Subject: Re: [PSES] Safe powering 12V doorlock Hi Bostjan, In 5.2.2 there is the sentence: "However, for a

[PSES] calibration of laser power and energy meters

Dear all, Does anyone knows any calibration laboratory that can perform traceable calibration of laser power and energy meters? Preferable in EU. Thank you for your support. Best regards, Bostjan - This message is from the

Re: [PSES] Safe powering 12V doorlock

Hi Piotr, I agree with Rich. According to specification, output also complies with LPS (Limited Power Source) therefore output must be SELV. There is no PELV definition in IEC 60950-1. About table 5B or 5C, which table you will use does not depend on output from your power supply but on

Re: [PSES] CB test certificate acceptance by another CB body

Amund, What you wrote is partially correct. When you are using components (power supply for building-in) inside your product, then when certifying final product certification body requires also CB test report for component in order to verify conditions of acceptability (or sometimes called

[PSES] insulation system

Dear experts What is your understanding of requirement in IEC 62368-1 about insulation system for transformer? On one part standard says that below 100°C no declared insulation system is required and on other part is says that above class 100 EIS shall comply with IEC 60085. So far it was very

Re: [PSES] Separation of Circuits

Hello John, I agree with Ted but would like to add that insulation of wire shall not be subjected to abrasion. Best regards, Bostjan From: Ted Eckert [mailto:07cf6ebeab9d-dmarc-requ...@ieee.org] Sent: Wednesday, September 13, 2017 3:45 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES]

[PSES] DoW of EN 60601-1 A1

Dear experts, Is anyone familiar why we have different DoW for EN 60601-1/A1 on cenelec web page and inside OJEU. Cenelec says 2018-12-24, while europa.eu (list of MDD harmonized standards) 2017-12-31. This is critical situation for manufacturers. Is it the same issue as with EN 62368-1-->

Re: [PSES] EN 62368-1:2014 DoW

Hello Ian, I have not been informed about it. If you check linked-in, UL is advertising count-down till DoW for EN 60065:2014. Best regards, Bostjan From: McBurney, Ian [mailto:ian.mcbur...@allen-heath.com] Sent: Monday, September 11, 2017 11:23 AM To: Boštjan Glavič <bostjan.gla...@siq

Re: [PSES] EN 62368-1:2014 DoW

Hello Ian, EN 60065:2014 has a DoW 17.11.2017. This is in two months. For this standard CENELEC and OJ show the same DoW. Best regards, Bostjan From: McBurney, Ian [mailto:ian.mcbur...@allen-heath.com] Sent: Monday, September 11, 2017 10:54 AM To: Boštjan Glavič <bostjan.gla...@siq.si>

Re: [PSES] EN 62368-1:2014 DoW

, the last update to the LVD OJEU was to add "take into account the new status of the 60335-2-9" There are a number of updates in the pipeline and they are working with CENELEC. Best Regards Nick From: Boštjan Glavič [mailto:bostjan.gla...@siq.si] Sent: 11 September 2017 09:08 To: EMC-PS

[PSES] EN 62368-1:2014 DoW

Dear all, There was new EU official journey published on Sep 08 2017, however still DoW 20.06.2019 is mentioned for EN 62368-1. Is anyone familiar about it? It is very important topic for customer who need to change certification for EN 60950-1 into EN 62368-1. Cenelec web page shows DoW as

Re: [PSES] -60Vdc Telecom supply voltage

Hello Kannan, As far as I know it was used in Russia, however they switch now to 48VDC. In deed there are many different systems and somewhere they might still use 60VDC. Maybe also in some other ex-Soviet Union countries. Best regards, Bostjan From: Kannan Dhamodaran

Re: [PSES] 230V 3-phase in Europe

Hi John, I believe IT system in Norway is still in use since they declared national difference to new hazard based EN 62368-1 standard with below text: Norway: After the 3rd paragraph the following is added: Due to the IT power system used, capacitors are required to be rated for the

Re: [PSES] 230V 3-phase in Europe

Hi Brian, As far as I know in Norway they use IT system with phase-phase voltage 230V. They have no Neutral. Best regards Bostjan On 7. avg. 2017, at 21.08, Kunde, Brian > wrote: Greetings. Sorry if this is a stupid question (I’ve asked

Re: [PSES] Bureau of Indian Standards (BIS) power supplies have their own BIS accreditation

Hi Chuck, The answer could be found in Circular no. 2 from September and December 2016, explaining power supplies used for servers or storage and all are covered http://meity.gov.in/writereaddata/files/Circular%201of2016_Power%20Supplies.pdf

[PSES] class II symbol

that majority of DIN rail power supplies without PE connection bear class II symbol. What is your view on this matter? With kind regards, Boštjan Glavič Head of Laboratory Safety and Electromagnetics phone +386 1 4778 265 SIQ Ljubljana - Trzaska cesta 2 - 1000 Ljubljana - Slovenia - www.siq.si

[PSES] Hosedown test

Dear experts, Is anyone familiar if there exists laboratory with accreditation for hosedown test according to UL 50E (type 4X)? The best would be in EU. Thank you for your support. Best regards Bostjan - This message is from the

Re: [PSES] Votlage Rating vs Voltage Specificaion

Hi Doug, I am familiar with expressions: operational voltage range and rated voltage range. Operational voltage range is in fact rated voltage range with tolerances. In your case 85-264V is operational voltage range, while unit is rated 100-240V. tolerances on rated voltages in your case are

Re: [PSES] safety standard - mobile inverters

What about IEC 62477-1: Safety requirements for power electronic converter systems and equipment - Part 1: General With kind regards,   Boštjan Glavič Head of Laboratory Safety and Electromagnetics   phone +386 1 4778 265 SIQ Ljubljana - Trzaska cesta 2 - 1000 Ljubljana - Slovenia - www.siq.si

[PSES] pre-mating of PE in hot-plug connector

Dear Experts, One customer is designing own connector for hot-plug application (power supply). Question is how much longer shall be PE pin than supply pins. Which standard shall be used for such connector? For reference you can see similar connector on below link.

Re: [PSES] dimension of the stud for PE

the stud arrangement provides at least triple that contact area. -Ken On Wed, Nov 30, 2016 at 11:33 PM, Boštjan Glavič <bostjan.gla...@siq.si<mailto:bostjan.gla...@siq.si>> wrote: Hi Ken, Thanks. So on short, if table 3B brings requirement of 50mm2 conductor, you would accept terminal

Re: [PSES] dimension of the stud for PE

Hi Ken, Thanks. So on short, if table 3B brings requirement of 50mm2 conductor, you would accept terminal if it brings contact area of 150mm2? Best regards, Bostjan From: IBM Ken [mailto:ibm...@gmail.com] Sent: Thursday, December 1, 2016 5:24 AM To: Boštjan Glavič <bostjan.gla...@siq.si&

[PSES] dimension of the stud for PE

Dear experts I hope there are some experts dealing with IEC 60950-1 standard. We have a product that has rated input current 130A. Unit is intended for permanent connection to mains and provide special terminals for 3 phases and bolt with stud for PE connectio. Question is how should we

Re: [PSES] standard for power suply for server room.

ITU L.1201, or ETSI 300 132-3-1, or ATIS-0600315.01.2015. Best Regards, ZHANG Guoqing Huawei Technologies Duesseldorf GmbH From: Boštjan Glavič [mailto:bostjan.gla...@siq.si] Sent: 2016年9月21日 6:10 To: EMC-PSTC@LISTSERV.IEEE.ORG<mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: [PSES] standard for

Re: [PSES] standard for power suply for server room.

: Wednesday, September 21, 2016 6:36 AM To: Boštjan Glavič <bostjan.gla...@siq.si> Cc: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] standard for power suply for server room. Hi Bostjan! You might be able to use 60950 or (UL1012?) anyway; I know the scope says "Mains or Battery powered

Re: [PSES] standard for power suply for server room.

Hi Doug, Thank you for your tip. I was already thinking of it, however I believe this is allowed only if middle point of supply has reference to earth. Best regards, Bostjan From: Doug Powell [mailto:doug...@gmail.com] Sent: Wednesday, September 21, 2016 6:17 AM To: Boštjan Glavič

[PSES] standard for power suply for server room.

Dear experts I again need your opinion on below issue. Customer was asked for development of power supply which will be used to supply a server in data centre. Input to power supply is defined as 750VDC. Unfortunately no information is available how this DC supply voltage is generated and

Re: [PSES] Measurement Accuracy

Measurement uncertainty depends on instruments used, method used etc. Each lab has to do calculation of measurement uncertainty for particular method. Measurement uncertainty becomes critical when results are close to the limit. High uncertainty means you have more chance to be in »a grey area«

Re: [PSES] Connection to ac mains with split end line cord

The Other Brian From: Boštjan Glavič [mailto:bostjan.gla...@siq.si] Sent: Tuesday, September 20, 2016 12:29 AM To: EMC-PSTC@LISTSERV.IEEE.ORG<mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: Re: [PSES] Connection to ac mains with split end line cord Hi Ken, With short delay, Thank you. So

Re: [PSES] Connection to ac mains with split end line cord

regards, Bostjan From: IBM Ken [mailto:ibm...@gmail.com] Sent: Monday, September 5, 2016 6:52 PM To: Boštjan Glavič <bostjan.gla...@siq.si> Cc: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Connection to ac mains with split end line cord Hi Bostjan! NEC (NFPA 70) has an Article 645 which

[PSES] Connection to ac mains with split end line cord

Dear experts, Can you help me with below item. I do not have experiences with NEC/CEC. Some people told me that only ATMs are allowed to be connected to mains without the plug, but i think this is strange requirement. Customer has an IT equipment cabinet (IEC 60950-1) with built-in power

Re: [PSES] [BULK] Re: [PSES] Fire requirements in standards

Hi Ted, It is not exactly true that if fire enclosure complies with IEC 60950-1 it will also comply with IEC 62368-1, except if you use the statement from clause 4.1.1. IEC 62368-1 has requirements also for top openings and side openings if fire cone from PIS propagates through the opening,

Re: [PSES] earthing through PCB traces

, 2016 9:12 PM To: Boštjan Glavič <bostjan.gla...@siq.si> Cc: EMC-PSTC@LISTSERV.IEEE.ORG Subject: RE: [PSES] earthing through PCB traces Hi Boštjan: > What is your view to this statement? How should we fill > the verdict in the test report in this case with pass or > N/A? I would

Re: [PSES] earthing through PCB traces

end-product." > > "NOTE This paragraph will be deleted in edition 3 > of this standard. It is added here to provide a > smooth transition from the latest editions of IEC > 60950-1 and IEC 60065 to this standard." > > Does this help? > > > Rich > >

Re: [PSES] earthing through PCB traces

". What if the PCB > trace cross-sectional area is greater than or equal to the cross-sectional > area stated in table 31? Meeting Table 31 on PCB traces would result in very > wide traces but it doesn't seem to be prohibited the way 62368 is worded. > > -Ken > > >

[PSES] earthing through PCB traces

Dear Experts, I need your opinion about requirements of IEC 62368-1 standard. Standard requires special limited short-circuit test on earthed accessible parts that are earthed through PCB traces. However this test is only applicable if protective current rating is below 25A according to clause

Re: [PSES] SV: [PSES] IEC60950-1, Table 2N - creepage

Dear Amund, On short: You need to apply Table 2N on outer layers and in inner layers only in case that temperature of the PCB exceeds 90°C and no thermal cycling test performed. If temperature of the PCB is <90°C, no thermal cycling test for cemented joints required and you need apply only

[PSES] UPS, short-time withstand current

Dear experts, I have a question with regard of requirements in UPS standard IEC 62040-1/A1 and UL 1778. There are listed options how to waive short-time withstand current testing, however these options in UL 1778 standard are different from one in IEC 62040-1. Client would like to fulfil

Re: [PSES] grounding of output of solar inverter

16, 2016 9:28 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] grounding of output of solar inverter Reference articles 250 and 690 of the NEC (NFPA70). Canada and Mexico code similar. Brian From: Boštjan Glavič [mailto:bostjan.gla...@siq.si] Sent: Monday, February 15, 2016 9:05 PM To: EMC

[PSES] grounding of output of solar inverter

Dear experts, Is anyone familiar with UL 1741? I am dealing with solar inverter for US market. Solar inverter can operate in utility interactive mode (feeding the grid) or in a standalone mode where only homeloads are supplied by inverter (anti-islanding relays are open, due to problems with

Re: [PSES] EN 60065 clause 8.17 TIW

ut the need of additional protection?. Thanks and regards, Scott On 22 Jan, 2016, at 2:24 am, Boštjan Glavič <bostjan.gla...@siq.si<mailto:bostjan.gla...@siq.si>> wrote: Hi Scott, Most of the manufacturers use one layer of thin sheet material between two windings (one TIW and

Re: [PSES] EN 60065 clause 8.17 TIW

Hi Scott, Most of the manufacturers use one layer of thin sheet material between two windings (one TIW and one normal enamel) just to avoid stress on insulation of TIW. The problem is mechanical stress which could by some time damage the wire insulation. Two TIW in contact is not a problem.

Re: [PSES] IEC 60950-1 PSU acceptance

Ian, I am afraid it is not so. I only know that IEC 62368-1 standard that will replace IEC 60950-1 and IEC 60065 is accepting power supply certified to IEC 60065 or IEC 60950-1. Maybe think if you are able to certify your product according to IEC 60950-1 or maybe IEC 62368-1. Check IEC guide

[PSES] size of protective bonding conductor

know where the values from table 2D or 3B are comming from? Thank you for your support. Best regards, Boštjan Glavič Laboratory of Electronic Engineering Head of Laboratory SIQ Ljubljana - This message is from the IEEE Product

Re: [PSES] Wireless charging

Dear all, TC 69 is dealing with wireless charging for automotive use. See link below to see an example how it works. There is also test for coins or other metal part inserted between the receiver and transmitter. https://www.youtube.com/watch?v=FBYEGhf3pbs TC100 is dealing with

[PSES] EMC surge test

Dear colleagues, Is anyone familiar with 1,3ms surge test according to EN 61000-4-1. I am looking for a test house in EU capable of performing this test. Peak voltage is 735V (3phase unit). Thank you for your support. Best regards, Bostjan -

Re: [PSES] US OSHA requirement for Class III equipment

Hi Charlie, I started this qestion on linked in some time ago. See below link. I hope you can see it, otherwise you need to join linked-in. Best regards, Bostjan https://www.linkedin.com/grp/post/1899348-195516492 From: Charlie Blackham [mailto:char...@sulisconsultants.com] Sent: Friday,

[PSES] requirement for spacings

560VDC (marked on the label). Thank you for your support. Best regards, Bostjan Boštjan Glavič Laboratory of Electronic Engineering Head of Laboratory SIQ Ljubljana, Tržaška cesta 2 SI-1000 Ljubljana, Slovenia T: + 386 (0)1 47 78 265 F: + 386 (0)1 47 78 444 E-Mail: bostjan.gla...@siq.si

Re: [PSES] requirement for spacings

Hello Rich, I understand your point. Unit is DC/DC converter supplied from generator or windmill. There is a 3 phase rectifier in front of the unit. Wind mild has rated phase voltage 230V tolerances of -15%/+30% (e.g. 195,5-299V). For short period (at start) output voltage can achieve 343V~

Re: [PSES] requirement for spacings

in place to ensure that this is reliably the case, etc. Again, the requirements of the end product standard need to be taken into account and will certainly influence your decision. On Wed, Sep 9, 2015 at 4:03 AM, Boštjan Glavič <bostjan.gla...@siq.si<mailto:bostjan.gla...@siq.

[PSES] rapid shut down requirement for solar inverter

Dear Experts, Do you know when this requirement will become mandatory in US/CAN? It is intended to protect firemen. Thank you for your support. Best regards, Boštjan Glavič Laboratory of Electronic Engineering Head of Laboratory SIQ Ljubljana, Tržaška cesta 2 SI-1000 Ljubljana, Slovenia T

[PSES] input current rating

Dear experts, Does anyone know what is behind the requirement, that measured input current of the unit can exceed the rated current by 10%? Where this 10% come from? Best regards, Bostjan - This message is from the IEEE

Re: [PSES] input current rating

:24 AM To: Boštjan Glavič Cc: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] input current rating Hi Bostjan! I had heard (and perhaps this is apocryphal) that the 10% was intended to allow for manufacturing tolerances in the final product. I don't know how the number was arrived at. -Ken On Sun

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