[PSES] 2nd Edition of IEC 62368-1 - G.8 (Metal Oxide) Varistors

Rich, As requested here are some comments on the 2nd Edition requirements IEC 61051 is a generic document. Your ad hoc group studying AC overvoltage protection might have been better served by the more recent and targeted document ITU-T K.77: Characteristics of metal oxide varistors for

Re: [PSES] Hipot with in-circuit voltage limiting devices IEC 61010-1 3rd Ed.

Richard, To be clear, what problem and subject correctly are you referring to? The IEC 61010-1 3rd Ed problem is specifying a test voltage of 0.9xclamping voltage. From memory Edition 1 of IEC 62368-1 never specified a test voltage of this level. Yes IEC 62368-1 had a twice AC mains

Re: [PSES] Hipot with in-circuit voltage limiting devices IEC 61010-1 3rd Ed.

Doug, I have received a reply from TC 66 that they will consider the clause F.3.2 problem at their next meeting in October. They have acknowledge that the usage of the term “clamping voltage” is imprecise. They would be receptive to any further inputs on this matter. I used the IEC system

Re: [PSES] Hipot with in-circuit voltage limiting devices IEC 61010-1 3rd Ed.

John I would be interested to see the latest draft of IEC 62368-1. I assume this is Edition 2. On surge protective components the original IEC 62368 introduced a safety test run at twice the the nominal AC voltage with decreasing values of series resistance. I would like to see a