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  #1  
Old Mon 04 February 2013, 17:23
saas
Just call me: saas
 
ceje
Slovenia
line in 16A - Slovinia

Question

correctly or .... the line in 16A ...and input toroid 3A ....?

tx

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  #2  
Old Mon 04 February 2013, 20:31
bradm
Just call me: Brad #10
 
Somerville(MA)
United States of America
That looks correct to me. 500W ~= 500VA / 220V = 2.27A so 3A is reasonable. 16A - 3A = 13A left over to provide to your spindle.
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  #3  
Old Tue 05 February 2013, 00:14
saas
Just call me: saas
 
ceje
Slovenia
honestly,
many do not putting 16A the fuse ..
I watched the making, do not put either 16A or 3A
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  #4  
Old Tue 05 February 2013, 18:25
MetalHead
Just call me: Mike
 
Columbiana AL
United States of America
Well one reason is the feed line has breaker typically.
I would put that 16a breaker after the disconnect.
I also question the 3 amp fuse size or need.
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  #5  
Old Wed 06 February 2013, 00:52
saas
Just call me: saas
 
ceje
Slovenia
..after the disconnect?
I do not know where exactly you think!
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  #6  
Old Fri 08 February 2013, 01:27
saas
Just call me: saas
 
ceje
Slovenia
...finally I do not need any fuses!

greeting
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  #7  
Old Sat 09 February 2013, 22:52
Regnar
Just call me: Russell #69
 
Mobile, Alabama
United States of America
A fuse is much cheaper than anything in the whole control box. They are there to save you money in the long run.
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  #8  
Old Sun 10 February 2013, 06:21
MetalHead
Just call me: Mike
 
Columbiana AL
United States of America
I can understand fuses in the right places. They are needed. Typically in the PS these are on the output side of the PS. On the input side we have breakers. That is what I am talking about.

What I see in the drawing above is that line in voltage comes in through a breaker into a rotary disconnect switch and then through a fuse.

The other leg is not connected to a fuse or breaker. If that is a Neutral line I can understand that setup with the exception of the 3A fuse. IF your fusing it at that point in the line, my question (I Iam not an electrician) is : Is that fuse large enough?

My other comment before was IF that is a 220V (Two 110V feeds) setup and we assume the feeder voltages are coming from a circuit with a breaker. I would have that breaker AFTER the rotary disconnect AND I would have a double pole breaker of the desired amperage to protect the transformer. And after saying that last part out loud, not a bad thought for everyone to do that.

I hope I am making sense with that.
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  #9  
Old Mon 11 February 2013, 06:31
saas
Just call me: saas
 
ceje
Slovenia
hello.

Again, I had to clarify this question ...
I asked my friend *professional electrician*.

answer is shown below....



or like the drawing 1070230

greeting
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