Hi Amund,
Yes, load up to worst case and then measure after 3 seconds for worst case LOAD fault (6.2.2.2) and SOURCE fault (6.2.2.3) Load fault is simple. We do this with an electronic load with a progressively stepped constant current load. 5 second dwell time and keep going until power supply turns off or we classify as PS3. Source fault is harder. What are the failure modes of your source? Can you imagine a fault that increases the capability of the source to output more power? This is usually a failure of regulation in the source that causes increased voltage. All the best James James Pawson Managing Director & EMC Problem Solver Unit 3 Compliance Ltd EMC : Environmental & Vibration : Electrical Safety : CE & UKCA : Consultancy <http://www.unit3compliance.co.uk/> www.unit3compliance.co.uk | <mailto:[email protected]> [email protected] +44(0)1274 911747 | +44(0)7811 139957 2 Wellington Business Park, New Lane, Bradford, BD4 8AL Registered in England and Wales # 10574298 Office hours: Every morning my full attention is on consultancy, testing, and troubleshooting activities for our customers' projects. I'm contactable between 1300h to 1730h from Monday to Friday. For inquiries, bookings, and testing updates please send us an email on <mailto:[email protected]> [email protected] or call 01274 911747. Our lead times for testing and consultancy are typically 4-5 weeks. From: Amund Westin <[email protected]> Sent: Thursday, October 26, 2023 11:34 AM To: [email protected] Subject: [PSES] SV: [PSES] Wire insulation - Flammability - IEC/EN 62368-1 Thanks James, As I understand you, the 15W limit must not be exceeded after a single fault (within 3 seconds). Right? BR Amund Fra: James Pawson (U3C) Sendt: 24. oktober 2023 10:41 Til: <mailto:[email protected]> [email protected] Emne: Re: [PSES] Wire insulation - Flammability - IEC/EN 62368-1 Hi Amund, This is my understanding. Level 1 energy sources = no safeguards required. I would always be prepared to review after single fault testing. We've never managed flames with a PS1 source but have melted cable insulation and battery holders. All the best James James Pawson Managing Director & EMC Problem Solver Unit 3 Compliance Ltd EMC : Environmental & Vibration : Electrical Safety : CE & UKCA : Consultancy <http://www.unit3compliance.co.uk/> www.unit3compliance.co.uk | <mailto:[email protected]> [email protected] +44(0)1274 911747 | +44(0)7811 139957 2 Wellington Business Park, New Lane, Bradford, BD4 8AL Registered in England and Wales # 10574298 Office hours: Every morning my full attention is on consultancy, testing, and troubleshooting activities for our customers' projects. I'm contactable between 1300h to 1730h from Monday to Friday. For inquiries, bookings, and testing updates please send us an email on <mailto:[email protected]> [email protected] or call 01274 911747. Our lead times for testing and consultancy are typically 4-5 weeks. From: Amund Westin < <mailto:[email protected]> [email protected]> Sent: Tuesday, October 24, 2023 9:35 AM To: <mailto:[email protected]> [email protected] Subject: [PSES] Wire insulation - Flammability - IEC/EN 62368-1 As long as wire in PS1/ES 1, there are no flammability requirements for the wire insulation? BR Amund _____ This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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