3 phase supplies

[PABLO]

Hi all, I Have been asked to put some 3 phase supplies in a factory 4 panels each rated at 120kw, 117kw 123kw and 115kw the length of the run is about 70m for each one and was after a bit advice of what size cable and mccb to use for each one will be on tray plate at high level. Any advise would be great cheers Paul...

 

[Sharpend]

What are your calculations suggesting?

 

[binky]

Supplied from what exactly?

 

[Marvo]

Is this a college question? Is the supply LV or MV?

Edit. Forget the second question, I see you mention MCCB's so I'm assuming LV?

What's the characteristics of the loads? PF? Inrush?

 

[kerching]

There's is usually a bit more information from the client than 'put 4 supplies in'. Have they not got someone who has actually designed it?
Can the incoming supply handle it , for a start?

Just curious

 

[PABLO]

There's is usually a bit more information from the client than 'put 4 supplies in'. Have they not got someone who has actually designed it?
Can the incoming supply handle it , for a start?

Just curious

yes the incoming supply can take it. This is the information that was emailed to them from the manufacturers and require a supply for each one.

 

[PABLO]

What are your calculations suggesting?

around a 70mm 4 core swa is what im getting

 

[PABLO]

Supplied from what exactly?

from a main panel 1600A

 

[Sharpend]

Not

around a 70mm 4 core swa is what im getting

Not sure where you get that from? Running a quick calc on the 120kW would suggest 95mm?

 

[Fleeting]

Not sure 70.0 is going to cut it with those figures. Is that the constant power of them.

 

[PABLO]

Not sure 70.0 is going to cut it with those figures. Is that the constant power of them.

That's the total load for the machine and is 3 phase neutral when I put it into my cable calc this is what its bring out 70mm 4 core swa 90degree ?

 

[PABLO]

That's the total load for the machine and is 3 phase neutral when I put it into my cable calc this is what its bring out 70mm 4 core swa 90degree ?

I would imagine that would be full start up power probs run at alot less

 

[Sharpend]

That's the total load for the machine and is 3 phase neutral when I put it into my cable calc this is what its bring out 70mm 4 core swa 90degree ?

What is the price difference and or availability between the 70mm 90° and the 95mm 70°. ?

 

[Fleeting]

That's the total load for the machine and is 3 phase neutral when I put it into my cable calc this is what its bring out 70mm 4 core swa 90degree ?

Yes must admit it does I just did it in my head initially.

 

[PABLO]

Yes must admit it does I just did it in my head initially.

the amperage for the mccb is coming out at 160a 3 phase but sounds too low to me ?

 

[Fleeting]

Have you been given any power factor information.

 

[PABLO]

Have you been given any power factor information.

no nothing other than what ive said no good really

 

[kerching]

70mm 4 core swa 90degree ?

Can the terminals at each end cope with 90°?