Electrical Engineering - Overloading of Transformer

Author

Overloading of Transformer

pcherussery@gmail.com

2008-03-15, 9:25 am

sub merged arc furnace 9mva transformer to be overloaded.....max prim
amps is 519.how much it can be overloaded, if possible...please
explain in detail

phil-news-nospam@ipal.net

2008-03-15, 5:25 pm

On Sat, 15 Mar 2008 02:55:19 -0700 (PDT) pcherussery@gmail.com wrote:

| sub merged arc furnace 9mva transformer to be overloaded.....max prim
| amps is 519.how much it can be overloaded, if possible...please
| explain in detail

What did the manufacturer say when you asked them, as a result of the advice
given to you when you previously posted this question?

Most likely, an arc furnace transformer is designed to limit the current in
a short circuit situation. Or are you planning to overload the voltage?

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|---------------------------------------/----------------------------------|
| Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below |
| first name lower case at ipal.net / spamtrap-2008-03-15-1546@ipal.net |
|------------------------------------/-------------------------------------|

Don Kelly

2008-03-15, 8:25 pm

----------------------------
<pcherussery@gmail.com> wrote in message
news:43d23014-3b6e-4ba5-93e0-f3a4412e4c88@s8g2000prg.googlegroups.com...
> sub merged arc furnace 9mva transformer to be overloaded.....max prim
> amps is 519.how much it can be overloaded, if possible...please
> explain in detail

Are you fishing for free professional advice on the basis of more unknowns
than knowns?
Hire a consultant.

--

Don Kelly dhky@shawcross.ca
remove the X to answer

dirskyster@gmail.com

2008-03-16, 1:25 pm

On 3=D4=C215=C8=D5, =CF=C2=CE=E75=CA=B155=B7=D6, pcheruss...@gmail.com wrote=
:
> sub merged arc furnace 9mva transformer to be overloaded.....max prim
> amps is 519.how much it can be overloaded, if possible...please
> explain in detail

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evo

2008-03-19, 9:25 am

[color=darkred]

The damaging culprit in overloading a transformer is the heat.
Generally, they are built to withstand a 25% current overload.
Install cooling measures for added protection. evo

phil-news-nospam@ipal.net

2008-03-19, 9:25 am

On Wed, 19 Mar 2008 08:37:15 -0500 evo <evo@sc.rr.com> wrote:
|
|>>transformer to be overloaded.....how much it can be overloaded....
|
| The damaging culprit in overloading a transformer is the heat.
| Generally, they are built to withstand a 25% current overload.

For how long? A few hours? A couple days? Until the transformer explodes?

| Install cooling measures for added protection. evo

How about a refrigeration system?

--
|---------------------------------------/----------------------------------|
| Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below |
| first name lower case at ipal.net / spamtrap-2008-03-19-0820@ipal.net |
|------------------------------------/-------------------------------------|

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