Do you have some VDRs connected to chassis? VDR starts to leak after certain number of strikes.
At low temperature leakage is higher through caps. Best 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.gla...@siq.si>; www.siq.si<https://www.siq.si/> [SIQ]<https://www.siq.si/> To elektronsko sporočilo je namenjeno izključno naslovniku. Pravno obvestilo.<https://www.siq.si/pravno-obvestilo-za-prejemnike-elektronske-poste/> The information transmitted by this email is intended only for the person or entity to which it is addressed. Disclaimer.<https://www.siq.si/en/legal-notice-for-e-mail-recipients/> [SIQ Facebook]<https://www.facebook.com/SIQLjubljana/> [SIQ LinkedIn] <https://www.linkedin.com/company/siq> [SIQ YouTube] <https://www.youtube.com/channel/UCURzJFvP5CDVtL_vdvWjbQA/featured> From: John Woodgate <j...@woodjohn.uk> Sent: Wednesday, March 26, 2025 11:46 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Leakage Fault Issue CAUTION: This email originated from outside of our organisation. Do not click links or open attachments unless you recognise the sender and know the content is safe. I am much too far away to access the product, but can you give a bit more detail, please? Is the leakage just "from the mains supply to the DC output", or can you track it down to a specific place in the product? Do yo have any reports of the leakage current values or the leakage resistance? Have any of the chargers been installed in areas of high humidity? The leakage could be caused by condensation on insulating material, including PCB surfaces. I guess condensation might not occur in your test lab. On 2025-03-26 22:32, Brian Gregory wrote: G'day from Colorado, We have an EV Charger product with a phantom leakage fault issue. I saw phantom, because nearly 75% of warranty units returned to us with the problem, show no signs of it when bench tested. We are looking for an FA team to help us with debugging and eliminating this issue, which could be fixed in hardware, or firmware. Please let me know by return post if you know a team or expert who can make a pitch, and I'll DM you back. Thank you, Colorado Brian ________________________________ This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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