running 480v machine on 380v

Besoeker3 said:
And that was the was the initial problem:

"A step up transformer with this ratio is not avaivlbe in the market"
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Unless he is in a very strange market, that constraint is an error.

Very likely the _exact_ transformer ratio is not available locally off the shelf, but with input from this crew we can probably figure out something that is close enough that the OP can reasonably get.

Any value 26% to 50% boost will do.

To @Emad : what transformers can you get? Can you get 240 to 120V single phase units? What about 380 to 120V?

Jonathan
 
Besoeker3 said:
And that was the was the initial problem:

"A step up transformer with this ratio is not avaivlbe in the market"
Click to expand...
Very simple, not complicated at all.
If a transformer is not an option, there is nothing that can be done except purchasing the correct unit.

The customer may not like the choice, but the laws of physics don't offer us any choice.
 
jim dungar said:
Very simple, not complicated at all.
If a transformer is not an option, there is nothing that can be done except purchasing the correct unit.

The customer may not like the choice, but the laws of physics don't offer us any choice.
Click to expand...
But that's point - if it was that easy a simple transformer would the job. It doesn't.
 
Emad said:
Many thanks for everybody for the engagement.
Now I decided to use a generator by changing its excitation and control protection to work for 480v
Will this have any impact on the generator insulation withstand? Any concerns to consider for this transformation?


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Click to expand...

480V is a common generator voltage. If the generator is designed for 480V then there are no issues with this approach.

Does the generator have a 12 lead alternator? Different voltages are usually a combination of excitation change and alternator connection. In the systems I've worked with, excitation could adjust the coil voltage from 120V to 140V, then the coils would be connected differently to get 208V, 240V, 416V or 480V.

I would be concerned about the components outside of the alternator if they are not specifically designed for the higher voltage.

D
 
Besoeker3 said:
If it was that simple he would find one.
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I'm not convinced he looked at all the options. He has an induction heat treatment machine and he has a 3 phase generator configurable to 480 volts. There is a transformer option that will work. It's just a hurdle, not an impossible task.

But what was your point about the output frequency of the machine? I didn't understand where you were going with that.
 
Besoeker3 said:
But that's point - if it was that easy a simple transformer would the job. It doesn't.
Click to expand...
It was a simple problem. What he has for equipment does not work with what he has for a source.
If he keeps his source he needs a transformer, even if he doesnt want one, or a different model equipment.

He solution is to change his source. This is now a different discussion.
 
CoolWill said:
I'm not convinced he looked at all the options. He has an induction heat treatment machine and he has a 3 phase generator configurable to 480 volts. There is a transformer option that will work. It's just a hurdle, not an impossible task.

But what was your point about the output frequency of the machine? I didn't understand where you were going with that.
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That's your opinion.
 
jim dungar said:
It was a simple problem. What he has for equipment does not work with what he has for a source.
If he keeps his source he needs a transformer, even if he doesnt want one, or a different model equipment.

He solution is to change his source. This is now a different discussion.
Click to expand...
I don't believe so. That's because it now a different problem.
 
tortuga said:
Completely off topic but since we have someone from Lybia so rarely
@Emad do you still commonly use type L receptacles in Lybia?
Are the nominal voltages still 220Y/127 and 380Y/220 ?
Or have they moved to 230Y/400?
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Yes@tortuga
We are now using type L outlets and power system is 380/220v 50hz.
However,there are a little number of old Oil fields that they still use 220y110 ,whose I believe established by Amharic companies in early 1960s


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