29 Dec '16, 6pm

Fail Of The Week: How I Killed The HiPot Tester

Have you ever wired up a piece of test equipment to a circuit or piece of equipment on your bench, only to have the dreaded magic smoke emerge when you apply power? [Steaky] did, and unfortunately for him the smoke was coming not from his circuit being tested but from a £2300 Clare H101 HiPot tester . His write-up details his search for the culprit, then looks at how the manufacturer might have protected the instrument. [Steaky]’s employer uses the HiPot tester to check that adjacent circuits are adequately isolated from each other. A high voltage is put between the two circuits, and the leakage current between them is measured. A variety of tests are conducted on the same piece of equipment, and the task in hand was to produce a new version of a switch box with software control to swap between the different tests. This particular instrument has a guard circuit, a pair of ...

Full article: http://hackaday.com/2016/12/29/fail-of-the-week-how-i-kil...

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