Kiln/furnace elements as dummy load? 10,000watt?

[Mooly]

12volt car batteries...

Fair enough. Batteries (plural) will deliver that short term. Even with good efficiency in the PSU and amp you are talking of "1000 amps plus" current demand at 12 volts.

Good luck

 

[Speedskater]

Is this amp for one of those automobile 'how loud can you go' contests?

 

[wg_ski]

12volt car batteries...

That was obvious. Perhaps I should rephrase the question - HOW MANY?

 

[ThyDntWntMusic]

That was obvious. Perhaps I should rephrase the question - HOW MANY?

Well that would depend on how big they are? And how long you want to play it for?

 

[Mooly]

Well that would depend on how big they are? And how long you want to play it for?

And the wiring capacity... anyone for paralleled OOOO AWG harnesses

 

[ThyDntWntMusic]

Not really sure how power cable would effect how many batteries I needed?

 

[Pano]

I have used the oil filled radiator type heaters as dummy load. Not soaking as much power as you want, but they work fine. They don't seem to change resistance much hot or cold, at least as far as I could tell. The idea seems "sound".

 

[DUG]

Where I used to work we used stove top elements for a 5.5KW 3 phase delta load.

Keep the fans running and they don't get red hot.

Price was right.

 

[Pano]

Good idea!

 

[wrenchone]

One of Nichrome's saving graces is that it's not supposed to have a huge variation in resistance with temperature (not like tungsten, at least), so I wouldn't expect a huge inrush current for a properly chosen heating element. Of course, it will help a lot to choose a element overrated for the power actually applied so that it doesn't get too hot, keeping the temperature (and resistance ) variation at a minimum.

 

[wg_ski]

Water heater elements can be immersed in ice water to keep the resistance varaiation down tp something reasonable.

Fan? Who needs a stinking fan! When it melts, keep adding ice.

 

[ThyDntWntMusic]

1ohm, 10kw.... heater...