Electronics > Projects, Designs, and Technical Stuff
Open HV Probe 40kV
joeqsmith:
A 50/60Hz neon sign transformer would be a good one to try. I wouldn't even assemble with the resistors. Maybe just put the wires on on the two ends. You could attempt to measure the current through it. Obviously a bit more risk. Anytime I play with these, I do it remotely.. :-DD
beanflying:
What is your thoughts on a Uni-T 210E measuring current on 10kV Plus wiring? :-+ or :-- or :-BROKE
joeqsmith:
I think if you are measuring mA+ leakage current through your plastic parts, something major is wrong!!
With your 12KV neon sign transformer, that would only be 12M and your plastic parts would dissipate 12 Watts! Then again, my math is not great so double check.
BravoV:
--- Quote from: beanflying on April 23, 2019, 02:03:50 pm ---I think the PS on my small Laser Cutter is 15-20kV and I have a Neon transformer that will be over 12kV and I can run it up to over 1kV on my Calibrators first so soft start then get something more to get medieval JoeQSmith on it ;)
--- End quote ---
Really tempting, as I just acquired recently a NOS 15kV neon transformer too, thanks for sharing these.
ArthurDent:
Warning! If I recall correctly, a neon sign transformer that has an output above about 7.5KV has a secondary that is centertapped and the centertap is grounded to the metal base. If you plan to use a neon sign transformer, then check it out to see if this is the case. I don't have a neon sign transformer but check it out before you power up the transformer. Oil burner igniter transformers may be centertap grounded as well. If you have a c.t. transformer and connect your meter common lead to one of the transformer terminals you could have a big problem.
Google it for more info. Also trying to disconnect the c.t. and ground one of the output terminals can cause transformer insulation failure
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version