I was told by CSA a couple of years ago that 100% hi-pot testing on the line is required ONLY IF IT IS CALLED OUT IN THE CERTIFICATION REPORT. In years past, they did require it on almost everything - and it was called out in the report. More recently, probably about 1993, CSA made this optional under some set of engineering guidelines - so not all newer reports require it. This test is typically using Vrms, not impulse. Most manufacturers I am aware of use Vrms on the production line because it uses cheaper, more available equipment. Also the cycle time of the impulse tester, and the requirement for multiple hits in each polarity makes it generally unsuitable for high volume, automated production lines. Whether a manufacturer actually tests 100% on the line varies by the product, whether automated or manual and customer requirements. In general terms, we 100% hi-pot test all products using Vrms at least as high as the agency requirements - often higher due to major customer demands. Input to output (coil to contacts) and between poles in a multi-pole devices are tested - maybe not at the same potential. Less common is a hi-pot test across open contacts - but some customers and European agencies require it in certain cases. Harold Leipold Internet [email protected] ---------- From: owner-emc-pstc To: emc-pstc; Art Michael Subject: Re: Routine Hipot testing (Status of prEN 50116?) List-Post: [email protected] Date: Thursday, May 02, 1996 1:32PM
Art Michael asked on April 30th if Hipot testing is a Routine Test or a Type Test and to my surprise nobody responded in 3 days. As far as I know only CSA mandates routine test but every country continues with the old tradition of production line hipot test. My questions regarding this: What is the present / future CSA position? IEC 1010 states that all safety tests are type tests, including dielectric strength. How many of the emc-forum participants do routine test? Most dimensioning is based on impulse test but very few sites are doing it. Why? Regards: Janos Vajda ___________________________________________________ > Date: Tue, 30 Apr 1996 15:23:40 -0400 (EDT) > From: Art Michael <[email protected]> > Subject: Status of prEN 50116? > To: [email protected] > Reply-to: Art Michael <[email protected]> > I'm trying to determine the status of prEN 50116 which addresses > production-line testing. In particular, I'm curious as to requirements > for hipot testing and ground continuity testing contained therein. > > ThanX n regards, Art Michael, Editor > * * * * * * * * * * * * * * * * * * * * * * > * International Product Safety News * > * Check out our current offer on the * > * Safety Link at http://www.safetylink.com * > * * * * * * * * * * * * * * * * * * * * * * > > > > >
