[PSES] HV transformer for industrial X-Rays

for 85kV? What it means if transformer is immersed in oil with regards of calculation of required cl/crd distances? Thank you for your support. Best regards, Bostjan Boštjan Glavič Vodja laboratorija, Laboratorij za elektroniko Head of Laboratory, Laboratory of Electronic Engineering Laborleiter

Re: [PSES] Test Report Forms for IEC/EN/UL/CSA 61010-1 3rd Edition

Dear Brian, You cannot buy a prepared test report form with all national deviations. You can only buy a basic IEC TRF on iec web page. TRFs are available free of charge if your laboratory is a member of CB scheme. You can ask your certification body for support. Each certification body and

Re: [PSES] safety 60950 and surge suppression circuits

Hi Bill, You can use MOV (VDR) primary to PE as long as you have reliable earth. Reliable earth is considered for pluggable equipment type B or permanently connected equipment. For pluggable equipment type A, you would need additional earthing point, what is usually not acceptable for clients.

[PSES] USB output limitation

Dear experts, What would be the limit of USB output? I know IEC 60950-1 requires only that it complies with limited power source, but there might be some other requirements to limit power from USB? In particular, I am talking about power supply with USB connector. Can it go up to 5Vd.c./3A?

Re: [PSES] recording Temp, % RH AP

Dear Julias, I believe it is enough to measure pressure in one location only. So you can save some money on calibration We are using omega dataloger in every room. It can store data up to 1 month without the problem and batteries are ok for 6 months. See below link. Best regards, Bostjan

Re: [PSES] USB output limitation

a fault when connected to the USB port you propose. Ted Eckert Compliance Engineer Microsoft Corporation ted.eck...@microsoft.com The opinions expressed are my own and do not necessarily reflect those of my employer. -Original Message- From: Boštjan Glavič [mailto:bostjan.gla...@siq.si

[PSES] Secondary cable

Dear experts, Does anyone know if it is required to use approved secondary cable on a direct plug-in power supply, where output meets limited power source (also meets class 2 according to UL1310). Power supply is intended for US/CAN market and it tested according to UL/CSA 60950-1. There is

[PSES] breakage of the fuse

Dear safety experts, During the abnormal tests in primary circuit, internal input fuse operates and glass breaks. However, fuse is inside the tubing and broken glass does not spread around. Would you accept such construction? Best regards, Bostjan SIQ -

Re: [PSES] breakage of the fuse

fuse. That's why I decided to ask you experts for 2nd opinion. UL has a PAG about this issue and does not allow it. However in the past many such construction were acceptable also by UL. Best regards, Boštjan Glavič Head of Laboratory, Laboratory of Electronic Engineering www.siq.si SIQ

Re: [PSES] Standards Dates

Brian, Are you sure? I have heard that CSA and UL are able to issue NRTL according to 3 rd Ed. We are just in process for applying 2 projects according to 3rd Ed to CSA. Best regards, Bostjan SIQ On 12. avg. 2013, at 15:03, Kunde, Brian brian_ku...@lecotc.com wrote: Regarding UL 61010-1 3rd

[PSES] LED monitor

Dear Experts, We are just approving one product for US/CAN market that comprises LED monitor. Would you consider LED monitor as a critical component and ask for NRTL approval? There is no back-light inverter inside and therefore no hazardous voltages. LED display panel itself is UL approved.

Re: [PSES] LED monitor

do you find approval of the panel useless? Best regards, Bostjan From: Richard Nute [mailto:ri...@ieee.org] Sent: Tuesday, August 13, 2013 6:57 PM To: Boštjan Glavič Cc: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: LED monitor Hello Bostjan: If the LED monitor runs on mains voltage

Re: [PSES] LED monitor

by; it is not necessary to include other data. Best regards, Richard On 8/13/2013 10:29 AM, Boštjan Glavič wrote: Hello Richard, Yes the unit is supplied by external power supply source with SELV, LPS output. The complete unit will be NRTL certified. My question is whether we need to consider

Re: [PSES] Safety and Altitude

In addition to 5000m and 2000m we have also approved products up to 2500m, 3048m and 4000m. Best regards, Bostjan Glavic SIQ On 6. sep. 2013, at 03:12, IBM Ken ibm...@gmail.commailto:ibm...@gmail.com wrote: I've used a number of different altitudes beyond the 2000m default (scaling based on

Re: [PSES] Safety and Altitude

,Inc.Beijing Office Tel:86-10-58203318 Cell:86-13810026747 -邮件原件- 发件人: Boštjan Glavič [mailto:bostjan.gla...@siq.si] 发送时间: 2013年9月6日 11:20 收件人: EMC-PSTC@LISTSERV.IEEE.ORG 主题: Re: [PSES] Safety and Altitude In addition to 5000m and 2000m we have also approved products up to 2500m, 3048m and 4000m

[PSES] UL1564

considered as dead metal enclosure? Best regards, Bostjan Boštjan Glavič Safety and Electromagnetics Laboratory of Electronic Engineering Head of Laboratory SIQ, 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.simailto:bostjan.gla

Re: [PSES] Spark Gap PCB Layout on AC Mains

Hi Brian, Standard IEC 60950-1 only allows use of MOV or combination MOV + GDT in primary circuit. No other surge protectors are allowed. As you mentioned, manufacturers are mostly using T protection (2 MOVs and one GDT). Best regards, Bostjan On 9. sep. 2013, at 18:00, Cortland Richmond

Re: [PSES] 答复: [PSES] question on clause 6.3 and 1.4.11 of IEC60950-1

Dear Zhang, As fair as I know, there are many old twisted pair wirings around the world without standardized cross-sectional are. Therefore they checked it and set maximum limit from central office to 1.3A. However on the subscriber side you will never get more than few 10mA (usually 20-40mA).

[PSES] FDA requirements for medical products containing wifi modules

Dear experts, I was yesterday speaking with one client who is quite desperate. They are producing medical products which contain wifi modules. They have told me, that FDA currently does not accept any such product if no additional testing on wifi module inside the unit are performed. The

Re: [PSES] LED Indicator Safety

From IEC 62368-1 (FDIS): Groups RG-1 and RG-2 according to IEC 62471 belong to exempt group-- no hazard The different classes are defined in IEC 62471. Low power application of LEDs are in the exempt group. UV radiation from general purpose incandescent and fluorescent lamps, with ordinary

Re: [PSES] UK plug

Hi Kim, What will be the PSU used for? Standard depends on the application. If the PSU will be used to supply information technology equipment then standard EN 60950-1 is applicable. BS 1363 is used just to verify plug part. I hope it helps. Best regards, Bostjan On 27. jan. 2014, at 16:32,

Re: [PSES] Calibration of touch current measurement network and instrument

our metrology department made just circuits according to IEC 60990 which do pass the calibration requirements. Output is directly attached to scope. Easy and usable. Best regards, Bostjan Boštjan Glavič Vodja laboratorija, Laboratorij za elektroniko Head of Laboratory, Laboratory of Electronic

[PSES] use of AC contactor in PV application in US/CAN

Dear Experts, Is anyone familiar if it is allowed to use a contactor instead of circuit breaker in PV application to disconnect inverter from the grid? NEC in Article 690 does not specify it precisely. What standard needs to comply this contactor? Best regards, Boštjan Glavič Safety

[PSES] Anti-islanding relay

Dear experts, Does anyone know if anti- islanding relay in power inverter also needs to disconnect a neutral conductor of 3W system? I have looked in UL 1741 and couldn't find any requirement. Thank you for your support. With best regards, Bostjan Boštjan Glavič Vodja laboratorija

[PSES] NEC

requirements from UL 1778? Thank you for your support. Boštjan Glavič - 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

Re: [PSES] NEC

will be generated from batteries. Best regards, Bostjan Boštjan Glavič Vodja laboratorija, Laboratorij za elektroniko Head of Laboratory, Laboratory of Electronic Engineering [SIQlogo60px] www.siq.sihttp://www.siq.si/ SIQ Ljubljana, Trzaska c. 2, SI-1000 Ljubljana, Slovenia, VAT ID: SI23509678 t +386

[PSES] question with regard of inverter

Dear experts, I am trying to figure out how to determine correct spacings for non-isolated inverter. According UL1741 OVC IV needs to be considered for inverter. From table 8.1 from UL840 I get a transients of 8,0kV for 450VDC input. Is that correct? Output of inverter is connected to AC grid

Re: [PSES] question with regard of inverter

Dear Rich, Thank you. DC input comes from solar cells therefore from outside. UL 1741 states that OVC IV needs to be used and for 120/240V it means 4000V. So what transient should I use from DC side? Why table 8.1 in UL840 also mentions dc input? Best regards, Bostjan Boštjan Glavič Vodja

Re: [PSES] Routine HiPot Testing

Hello Mike, There is a standard EN 50514 Audio, video and information technology equipment - Routine electrical safety testing in Production in EU which describes requirements for routine testing. This standard for example is used if your product bears ENEC mark. There are mention values of

Re: [PSES] question with regard of inverter

projects and i think that some requirements are not really clear. Best regards, Bostjan Boštjan Glavič Vodja laboratorija, Laboratorij za elektroniko Head of Laboratory, Laboratory of Electronic Engineering [SIQlogo60px] www.siq.sihttp://www.siq.si/ SIQ Ljubljana, Trzaska c. 2, SI-1000 Ljubljana

Re: [PSES] question with regard of inverter

Doug, I did, also many other documents like UL technical briefs. I have exact technical questions. Maybe I prepare a new email and list some of them. Best regards, Bostjan Boštjan Glavič Vodja laboratorija, Laboratorij za elektroniko Head of Laboratory, Laboratory of Electronic Engineering

[PSES] IEC 62368-1 (2nd Ed.) - QUESTIONS

Dear all, Below are some tecnical questions about IEC 62368-1 I found during power supply testing according to this standard. There are plenty of others, but let's discuss these first. Best regards, Bostjan 1) Y2 capacitor across basic insulation. According to the clause G.11 and tables G.8,

Re: [PSES] FW: IEC 62368-1 rated AC input connector amperage differs from North America

. This is what I remember from my colleagues who used to test TVs. Unfortunately we have no more audio devices to test, since they are mostly designed in far east. Best regards, Bostjan Best regards, Bostjan Boštjan Glavič Vodja laboratorija, Laboratorij za elektroniko Head of Laboratory

Re: [PSES] FW: IEC 62368-1 rated AC input connector amperage differs from North America

on a recording r.m.s. ammeter, during a representativeperiod. Boštjan Glavič Vodja laboratorija, Laboratorij za elektroniko Head of Laboratory, Laboratory of Electronic Engineering [SIQlogo60px] www.siq.sihttp://www.siq.si/ SIQ Ljubljana, Trzaska c. 2, SI-1000 Ljubljana, Slovenia, VAT ID: SI23509678

[PSES] reducing of OVC

Dear experts, We have an IT product intended for connection to OVC IV (6kV transients). Input filter also comprises two IEC 61051-2 certified varistors (L to middle point, N to middle point) and one GDT (middle point to PE). Annex G of IEC 60950-1 is saying that we need to measure transient

Re: [PSES] Battery certification issue

Dear Sudhakar, So what is the point being member of CB scheme if they do not accept results from IECEE CB report? This is in contradiction to CB scheme idea which points out one time testing. US national standard is also UL 60950-1 but they accept IECEE report if national differences are

[PSES] anti-islanding relay

Dear experts, Does anyone know where I can find spacing requirement for anti-islanding relay? I need to know required distance when contact is open. UL1741 does not include such requirement. Do I need to simulate short accross the relay's contact during fault condition testing? Best regards,

Re: [PSES] Li battery requirements per 60950-1

Good point Brian. Also standard says portable cells and batteries. Does it mean that no IEC 62133 approval is required if battery is installed in fixed device, e.g. transmitter? Best regards, Bostjan Boštjan Glavič Vodja laboratorija, Laboratorij za elektroniko Head of Laboratory, Laboratory

Re: [PSES] Disconnect power before servicing label required?

Dear Jim, You probably mean near appliance inlet? I do not see a background for such label. Special label is required for service engineer if you have more connection to mains supply. What kind of service activities are planed on the unit? Best regards, Bostjan Boštjan Glavič Vodja

[PSES] Y2 capacitor in DC circuit

Dear experts, I have one question. One of our clients is generating high voltage DC bus out of primary circuit without the insulation. This 800VDC circuit is therefore considered as part of primary circuit. They are using Y2 capacitor between this DC voltage and PE (accross basic insulation).

[PSES] outdoor supply cord

Dear Experts, Does anyone know what standard should be followed for a power supply cord used to supply outdoor IT equipment? I need requirements for EU, China and US. I am not sure if normal cords approved to standard IEC 60227 and IEC 60245 can be used. Best regards, Bostjan Boštjan Glavič

Re: [PSES] outdoor supply cord

Hi Ted, Thank you. It will be permanently installed outdoor unit. Best regards, Bostjan Boštjan Glavič Vodja laboratorija, Laboratorij za elektroniko Head of Laboratory, Laboratory of Electronic Engineering [SIQlogo60px] www.siq.sihttp://www.siq.si/ SIQ Ljubljana, Trzaska c. 2, SI-1000

Re: [PSES] safety distances in DC/DC

on this subject. Best regards, Bostjan Boštjan Glavič Vodja laboratorija, Laboratorij za elektroniko Head of Laboratory, Laboratory of Electronic Engineering [SIQlogo60px] www.siq.sihttp://www.siq.si/ SIQ Ljubljana, Trzaska c. 2, SI-1000 Ljubljana, Slovenia, VAT ID: SI23509678 t +386 (0)1 4778 265tel

Re: [PSES] SELV rated power supplies

, Boštjan Glavič On 21. jan. 2015, at 21:04, Richard Nute ri...@ieee.orgmailto:ri...@ieee.org wrote: Dear Boštjan: Page 7 is mostly wrong. Comments in blue. Best regards, Rich DC/DC converter isolation requirements Functional insulation between the DC/DC converter’s input

Re: [PSES] safety distances in DC/DC

Dear Rich, Thank you. So in reality no way to avoid abnormal testing, since on transformer we always measure 42,4Vpk. Best regards, Bostjan From: Richard Nute [mailto:ri...@ieee.org] Sent: Thursday, January 15, 2015 1:52 AM To: Boštjan Glavič; EMC-PSTC@LISTSERV.IEEE.ORG Subject: RE: [PSES

Re: [PSES] SELV rated power supplies

conditions are required in order to verify that output remains SELV. http://archive.ericsson.net/service/internet/picov/get?DocNo=31/28701-FGB101378Lang=ENHighestFree=Y Boštjan Glavič On 20. jan. 2015, at 20:05, Scott Aldous 0220f70c299a-dmarc-requ...@ieee.orgmailto

Re: [PSES] OSM decision

Dear Brian, I am afraid they are right. There are no requirements for VDR located after bridge rectifier - same as for X capacitors. Best regards, Bostjan -Original Message- From: Brian Oconnell [mailto:oconne...@tamuracorp.com] Sent: Monday, January 26, 2015 8:56 PM To:

[PSES] safety distances in DC/DC

to avoid fault condition tests. I am quite positive about scenario a) and c) but not sure about scenario b). Thank you for your support. Best regards, Boštjan Glavič - This message is from the IEEE Product Safety Engineering Society

Re: [PSES] To earth or not to earth......

Yes, it has to be connected, add requirements in installation instructions. Best regards, Bostjan Boštjan Glavič Vodja laboratorija, Laboratorij za elektroniko Head of Laboratory, Laboratory of Electronic Engineering [SIQlogo60px] www.siq.sihttp://www.siq.si/ SIQ Ljubljana, Trzaska c. 2, SI

[PSES] electronic backfeed protection

Dear experts, Is anyone familiar with construction of electronic backfeed protection in UPS? When user or service engineer disconnects UPS terminal/connector from mains supply, only electronic components / semiconductors are protecting the user/service engineer from internal hazardous

Re: [PSES] To earth or not to earth......

Hi Chris, For permanently connected equipment or pluggable equipment type B or pluggable equipment type A with additional PE conductor for permanent connection you do not need a GDT in series to varistor. You can directly connect varistor primary to PE. For pluggable equipment type A you

Re: [PSES] IEC 62368-1

answered for China. Do you know when hybrid TRF will be available? Best regards, Bostjan From: Pete Perkins [mailto:peperkin...@cs.com] Sent: Monday, April 20, 2015 2:08 AM To: Boštjan Glavič; EMC-PSTC@LISTSERV.IEEE.ORG Subject: RE: [PSES] IEC 62368-1 Bostjan, et al

[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

[PSES] IEC 62368-1

, Japan, Australia, Korea, Taiwan, Argentina. 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: + 386 (0)1 47 78 265 F: + 386 (0)1 47 78 444 E-Mail: bostjan.gla

Re: [PSES] IEC 62368-1

Glavič; EMC-PSTC@LISTSERV.IEEE.ORG Subject: RE: IEC 62368-1 Dear Boštjan Glavič, Chinese version of IEC 62368-1 is in draft, I guess the time to be a formal Chinese standard is about one to two years. Best Regards, Tsing ZHANG [tʃiːŋ ] Chinese name : Zhang Guoqing Product Safety Compliance

[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] 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] 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] 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] 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.

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

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] 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 > > >

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] 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

[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] 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] 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] 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] 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] 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

, 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] [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] 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] 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] 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] 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

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

[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] 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

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] 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«

[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

[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] 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&

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] -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] 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

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

[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

[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] 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

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>

[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

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