high voltage probe (0-30kv)

[jmmendicoa]

Hi ,does anybody knows a project for building a High Voltage Probe from 0 to 30 Kv .
I will apreciate if send the project to me

[LiveRock]

if you are thinking of measuring high voltage, you can check below:

http://dawntreader.net/hvgroup/divider.html

[LiveRock]

and this:

http://www.repairfaq.org/sam/hvprobe.htm

[steven]

:)i posted a high voltage probe circiut schematic in the high voltage stuff section somewhere agers ago it should still be there look at topic high voltage circiuts if it hasent been wiped by hackers it should still be there , if not go to the site tesla down under thats where it comes

[Freddybaby]

Is your application for just DC or do you need compensation for HF (Like a scaled up scope probe) ?  Also, the load resistance of your meter/s must be consistant as this will affect the ratio.

Simple DC method

30 1M, 1000V rated resistors ( or whatever you can find for 30KV)

To determine the low voltage resistor (R2)

R1 (30M) / Ratio-1  (Lets say 1000/1 ratio)

30M/999 = 30,030.03  (This is the effective tap resistance)

Then determine the parallel resistance across your load (meter) to
get the proper ratio.

(10M * 30,030.03 ) / (10M - 30030.03)

= 30,120.48 ohms

There are other factors to consider such as temperature and voltage coeffecient and
possible corona discharge at above 15KV.  This can be reduced with large conductor
sizes and potting (difficult to do correctly).

Good luck