I do similar stuff.
I use a good quality bench scope, and a separate, reliable, HV probe: MICSIG.
In my case, devices under test can be, and are, transported to the test bench,
where all safety precautions are readily available and in place.
118kW sounds far above anything I've ever come across. I suspect my setup would not be up for that...
I would be ok with the 800V in the test equipment.
(yes, I can see the comments from a lot of guys: "YOU'RE GOING TO BE FRIED ALIVE!")
I think I'm in a position, as well as Sheldon, by the looks of it, where we can say:
"we know what we are doing, and know the risks involved. We are professionals at it, not DIY's"?
I agree with your perspective. A discard able one sounds like a good idea.
If the calibration thingy doesn't worry you, then yes. I would by that model you pointed.
After sales service doesn't seem to matter, considering their life expectancy... :D
Nuno T.
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-----Original Message-----
From:
[email protected] [mailto:
[email protected]] On Behalf Of SheldonD via groups.io
Sent: 17 December 2024 18:03
To:
[email protected]Subject: Re: [electronics101] Speaking of Oscilloscopes
Intended purpose is to look at waveforms / triggers of IGBT and their drivers on a 118KW aux pwr supply fed by 800vdc.
Cost is a factor, I can see losing an IGBT & Driver violently and taking out whatever may be connected. Waveforms to actual IGBT are max 30vdc, so can use HV probe to a point. It is not uncommon for flash to occur across isolated area and blow out what has been connected.
I did look at reviews, saw calibration comments.
Needing something... disposable that can still capture pwm down to fractions of a ms.
~SD
--
Nuno T.
