High voltage tests at reduced pressure

Question

I'm looking for someone for discussion of high voltage rution tests of gas Instrument transformers at the lower pressure of the gas

mapj1 · Accepted Answer

Ah well, you probably know much more about the standards side of it than I do, my only experience of anything even remotely like that is nearly 20 years ago for 3gpp, where for a while I was asst convenor to a small group looking at 3G handset performance verification. 
 But if your group is anything like that was, then if folk are bringing technical CRs to change test limits or processes, and expect them not to be thrown out almost unread, then surely they should also be providing the justification and supporting data either to the committee members under NDA, or in the form of open publications. IEC process may be a bit different of course. 
 Technically, not procedurally, I can say that in other areas of gas filled high voltage stuff I have seen, which is NOT the sort of thing covered by IEC (experimental lab kit, laser triggered gaps, for TR switching and components of accelerators etc, all very custom design) it is common to do production test at nominal gas pressure and some agreed over-voltage, and/or 75-80 % of nominal gas pressure and nominal voltage, and gas leak test at 120-125% of nominal pressure, maybe with or without voltage at all, but also that in practice during development all sorts of other things such as partial discharges versus slowly increasing voltages are tested. I'd expect gas filled transformers to be similar, but I'd be very happy to be corrected - as I said above it is not really my area. 
 Production test is much simpler as it only needs to catch defective parts or incorrect assembly - you are verifying the thing is built to meet the plan, not that the design on the plan is fit for purpose - someone else did that during development. Mike

High voltage tests at reduced pressure

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