HI John,thanks for loaning a few neurons to this. Don't worry, we've got chargers all over N. America; I'll be I can find one really close if it comes to that. > 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? Yes, we have a CCID circuit, which is required by the safety standards. The issue is injecting a known value to periodically check the circuit is working.The error we're having is a lack of a positive result from the check. > Do yo have any reports of the leakage current values or the leakage resistance? I think we test inject 20mA. > Have any of the chargers been installed in areas of high humidity? Yes, all over N. America, including Florida. We have found a small correlation with temperature: we can increase/decrease somewhat the likelihood of a failure to detect the test signal in the oven, so thermal signal drift is a likely candidate. I get a few more details if you've got a promising approach. thanks again, Colorado Brian
---------- Forwarded Message ---------- From: John Woodgate <[email protected]> To: [email protected] Subject: Re: [PSES] Leakage Fault Issue Date: Wed, 26 Mar 2025 22:46:08 +0000 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. To post a message to the list, send your e-mail to [email protected] All emc-pstc postings are archived and searchable on the web at: https://www.mail-archive.com/[email protected]/Website: https://ewh.ieee.org/soc/pses/ Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to unsubscribe) List rules: https://pses.ieee.org/wp-content/uploads/2024/12/EM-PSTC-List-Rules.pdf For help, send mail to the list administrators: Mike Sherman at: [email protected] Rick Linford at: [email protected] For policy questions, send mail to: Jim Bacher at: [email protected] To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1 -- OOO - Own Opinions only If something is true: * as far as we know - it's science *for certain - it's mathematics *unquestionably - it's religion Virus-free.www.avg.comThis 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 [email protected] All emc-pstc postings are archived and searchable on the web at: https://www.mail-archive.com/[email protected]/ Website: https://ewh.ieee.org/soc/pses/ Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to unsubscribe) List rules: https://pses.ieee.org/wp-content/uploads/2024/12/EM-PSTC-List-Rules.pdf For help, send mail to the list administrators: Mike Sherman at: [email protected] Rick Linford at: [email protected] For policy questions, send mail to: Jim Bacher at: [email protected] To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1 - ---------------------------------------------------------------- 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 [email protected] All emc-pstc postings are archived and searchable on the web at: https://www.mail-archive.com/[email protected]/ Website: https://ewh.ieee.org/soc/pses/ Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to unsubscribe) List rules: https://pses.ieee.org/wp-content/uploads/2024/12/EM-PSTC-List-Rules.pdf For help, send mail to the list administrators: Mike Sherman at: [email protected] Rick Linford at: [email protected] For policy questions, send mail to: Jim Bacher: <[email protected]> _________________________________________________ To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1
