Hi Everyone,
Thank you for the responses both on and off list, it has been helpful. Doug, I have seen that report but it does not seem to indicate that longer duration overvoltages in excess of 300V are commonplace. I have anecdotally heard that power supplies, even if they have past CISPR immunity and IEC 61000 power fault testing, can be damaged by longer duration voltage surges that are supposedly common in India during load shedding. Our power supplies do not suffer unusual failure rates anywhere in the world and have been through immunity testing without any issues, but I have been asked to get them ready for India with the warning that we may have problems. Trying to get some hard facts before I ask for a custom SKU only for India. Right now while the power quality in India may be poor, the products are not critical and a power interruption would not be a big deal, so it does not seem warranted. Regards, Dan From: Douglas Powell [mailto:doug...@gmail.com] Sent: Wednesday, March 25, 2020 10:59 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Power quality issues in India Dan, Possibly this article will be helpful, http://www.forumofregulators.gov.in/Data/Reports/Power07.pdf, check into issues like surge, sag, swell and spikes. It's only a couple of years old. Doug ------------------------------------------------------------------- I'm here to help you succeed! Feel free to contact me with any questions related to product safety, certifications, risk assessment, or EMI ... at no obligation. I'm always happy to help! Douglas E Powell Vertex Compliance Consulting Laporte, Colorado USA doug...@gmail.com <mailto:doug...@gmail.com> http://www.linkedin.com/in/dougp01 On Tue, Mar 24, 2020 at 11:41 AM sudhakar wasnik <0000008dfaa51ca2-dmarc-requ...@listserv.ieee.org <mailto:0000008dfaa51ca2-dmarc-requ...@listserv.ieee.org> > wrote: Dan, Yes, Indian power supply system is quite notorious for surges, voltage fluctuations etc. Most of Telecom or other industries beef up Power supply system as well as use UPS, HTH, Sudhakar wasnik Sent from my iPhone On Mar 24, 2020, at 10:17 AM, Wiseman, Joshua <joshua.wise...@orthoclinicaldiagnostics.com <mailto:joshua.wise...@orthoclinicaldiagnostics.com> > wrote: Dan, in a past life I worked for a company that makes commercial ice cream makers like you would see in your local Dairy Queen, McDonalds, Burger King, etc. For India we had to include a UPS for some of our models because the power there would give us problems with the controls. I don’t know the details but I do recall adding a UPS option to a newer model unit as recently as 3 yrs ago because of it. The UPS took care of the problem for the manufacturer when I worked there. Josh From: Dan Roman <00000d75e04ed751-dmarc-requ...@listserv.ieee.org <mailto:00000d75e04ed751-dmarc-requ...@listserv.ieee.org> > Sent: Tuesday, March 24, 2020 12:35 PM To: EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: [PSES] Power quality issues in India EXTERNAL SENDER: Verify links, attachments and sender before taking action Hello List! Hope everyone is staying healthy and safe. I would like to know if anyone has experience with power quality issues in India related to damaging equipment and whether you find it is necessary to harden power supply designs specifically for India that you would not normally consider for other regions like the EU. From some reading on the topic there seem to be power quality issues but these are largely power interruptions and voltage sags that would temporarily cause the product to stop functioning but not result in the permanent damage of a global design. I have no recent experience with India but over a decade ago I do not recall having any issues with equipment in data centers, but perhaps they had facility power conditioning so the local building infrastructure prevented issues. Is the failure rate with typical consumer products higher in India because of power quality issues? Are extra precautions necessary? Thank you. ______________________________________________________ Dan Roman, N.C.E. Senior Member IEEE Product Safety Engineering Society mailto:dan.ro...@ieee.org - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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To post a message to the list, send your e-mail to <emc-p...@ieee.org <mailto:emc-p...@ieee.org> > All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) <http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org <mailto:sdoug...@ieee.org> > Mike Cantwell <mcantw...@ieee.org <mailto:mcantw...@ieee.org> > For policy questions, send mail to: Jim Bacher <j.bac...@ieee.org <mailto:j.bac...@ieee.org> > David Heald <dhe...@gmail.com <mailto:dhe...@gmail.com> > -- Douglas E Powell doug...@gmail.com <mailto:doug...@gmail.com> http://www.linkedin.com/in/dougp01 - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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