VLF vs AC HiPot - Page 2

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So as a brief answer, yes, I have used a VLF to hi pot a breaker in a bind. Just like you, it was all I had on site. In my eyes, a VLF was better than just a 5kV megger and DLRO. What I will speak on is "stress"... Think about why we use VLF on cables. We use it because using an AC hi pot at 60Hz is very stressful and damaging to cables (it's more technical than that explanation, but being brief). In my mind, I want to stress this breaker and make sure it won't fail on me when I rack it back into an energized cubicle. I want to stress it to make sure it wont fail when I close it and energize a circuit. That is the way I think of this topic. Its one of those statements that you make, "use the proper tool for the job" kind of deals. Use what's available to you, because something is always better than nothing

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