Mike, In my experience, the purpose of the end-assembly, 100% mfg. hi-pot test is to check the integrity of the electrical connections and of the required isolation levels. On the manufacturing end, any number of events can create a disturbance in the insulation of the product. These can often include insulation migration, miswiring, skinned insulation on conductors, quality issues with OEM supplied parts (i.e. connectors, supplies, etc.) due to time or transportation effects and so on....think Murphy's Law. Restated, the factory test will help identify an otherwise catastrophic fault waiting to happen out in the field.
For the most part, it's effective and pretty much required by a safety agency as part of the approval. Cheers, Kaz Gawrzyjal Sr. Product Safety Engineer ---------------------------------------------- Sanmina Canada ULC Wireless Development Centre 2924 11 Street NE Calgary, Alberta Canada, T2E 7L7 tel: 403-232-4805 (ESN 765) fax: 403-232-4813 (ESN 765) e-mail: [email protected] > -----Original Message----- From: Mike Morrow [mailto:[email protected]] Sent: Thursday, August 31, 2000 11:40 AM To: EMC Society Subject: Why routine hipot is required. I've been asked why a routine hipot test is required on an end assembly computer when it uses a Listed power supply that has already been hipot tested. So far I don't like the way I've worded my response. Basically what I've said is that a power supply is approved as a component. The end safety of the device depends on the installation. Can anyone add some more beef to this statement. Thanks. Mike Morrow Senior Compliance Engineer Ucentric Systems 978-897-6482 [email protected] www.ucentric.com ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected]
