Current Impulse waveforms 1

[kistenr]

I am currently developing a test circuit to output a lightning current wave with a peak of 10kA. My problem is that in order to get the required characteristics of the wave ie. rise and fall times, I need a 0.3ohm resistor. I am not sure what type of material to use that would sustain a peak of 10kA for approxiamately 30microseconds. I was considering water...any suggestions.

 

[kraigb]

You might try getting in touch with the folks at HV Technologies (

http://www.hvtechnologies.com/

)

I once attended a high voltage testing techniques seminar sponsored by them, and a number of them seemed pretty well plugged in (no pun intended) to the suppliers for equipment like that.

HV Technologies, Inc.
P.O. Box 1630
Manassas, Virginia 20110

tel. (703) 365-2330
fax. (703) 365-2331

 

[nbucska]

It is only 300 J/pulse. I think you could make the R
from a a lenght of iron band. I would fold it in a
VVVVVVV shape and if the frequency is high enough
perhaps immerse it in water.

E-mail for more.... <nbucska@pcperipherals.com>

 

[jbartos]

Suggestion: Visit

http://www.thomasregister.com

and search for the resistor manufacturer offering the resistors for lightning circuits. In case that you need a nonlinear resistor it could have some other name, e.g. thyrite, etc.