Author Topic: How to generate 25VAC at 500 amps?  (Read 8044 times)

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Offline OldNeurons

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Re: How to generate 25VAC at 500 amps?
« Reply #25 on: May 22, 2015, 04:44:37 pm »
Probably DC instead of AC if it is for anodisation.
I know this company located in Germany.
http://www.plating.de/en/home.html
I have been using their products for the development of automated plating systems working 24/24.
Very compact and reliable.
They are also flexible, and can build a power supply according your exact requirements.
I know also a sweedish company doing the same. They are more expensive. I can't recall their name right now.

KraftPowercon: http://www.kraftpowercon.com/
This is the name of the Swedish company that I also contacted for the project I mentioned before.
There products are more expensive than those from Plating Electronic, but they are also experts.

I am smilling when reading the last posts. Are we still talking about an industrial and viable solution?
Do you really want to help JohnnyP?
 

Offline N2IXK

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Re: How to generate 25VAC at 500 amps?
« Reply #26 on: May 22, 2015, 04:53:59 pm »
Simplest solution is a custom wound 480:25 transformer.  If the guy is serious, he should send an inquiry to a place that specializes in such things.  One possibility is P.W. Dahl/Hammond, who make similar transformers for operating the filaments of huge transmitting tubes:

http://www.pwdahl.com/index.html
"My favorite programming language is...SOLDER!"--Robert A. Pease
 

Online Gyro

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Re: How to generate 25VAC at 500 amps?
« Reply #27 on: May 22, 2015, 07:03:50 pm »
Surely his 480V supply is going to be a 3 phase one???

Isn't he going to need a 3-phase transformer? I wouldn't have thought he'd want 25kVA hanging off just one of the phases.
Best Regards, Chris
 

Offline N2IXK

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Re: How to generate 25VAC at 500 amps?
« Reply #28 on: May 22, 2015, 07:15:27 pm »
If he needs a DC output, then a 3 phase transformer (and 3 phase rectifier) would be preferable as far as load balancing.

If he needs a single phase AC output, then he needs a single phase transformer. To get 480V, it would be fed from 2 legs of the incoming 480V feed.
"My favorite programming language is...SOLDER!"--Robert A. Pease
 

Online Gyro

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Re: How to generate 25VAC at 500 amps?
« Reply #29 on: May 22, 2015, 07:44:47 pm »
Absolutely on the DC case.

On the AC, of course it would be, sorry. 25kVA between 2 phases is still quite hefty, but I guess that sort of thing is quite common in industrial buildings depending on how the other loads are distributed (and powered on and off). I guess the utility company must have some sort of maximum spec to be met. No simple way around it anyway.
« Last Edit: May 22, 2015, 07:52:17 pm by Gyro »
Best Regards, Chris
 

Online Zero999

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Re: How to generate 25VAC at 500 amps?
« Reply #30 on: May 22, 2015, 08:00:37 pm »
If it's DC then an SMPS will probably be the best solution.

For AC though, you need a transformer.

Either way, it's quite likely it will need to be a custom made product.
 

Offline rickselectricalprojects

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Re: How to generate 25VAC at 500 amps?
« Reply #31 on: May 24, 2015, 08:52:27 am »
your best bet is a (or a few) old welding transformers. that's probably the cheapest way to get 24v at 500a :-+
hope this helps
 


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