60 amp panel 1000'

[nickelec]

Need some input and some thoughts from the crew here I need to run a 60 amp sub panel from a three phase 120/208 panel about 1000 ft away I was thinking to possibly put a step up transformer at the current service to reduce the size of the wire needed and then step back down at the panel location any thoughts

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[augie47]

Depending on the nature of your load (lighting, motors, etc_) and the actual load, 4/0 or 250AL would likely be acceptable.
Transformers are a good method but at that load it might not be that economical.

 

[LarryFine]

For 1000 feet, definitely go for as high a voltage as you can. Just remember you'll be powering them both all the time.

Perhaps price it both ways. Is the load 3-phase, too, and what is the actual expected load current?

 

[ptonsparky]

Just run bigger wire. Transformers add unneeded complexity. What’s the actual load?

 

[nickelec]

All this is for is a camera system really wa giving them the option to add inte future but all I need now is enough current to operate the system

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[LarryFine]

Solar and battery?

 

[ptonsparky]

We have a similar deal. Truck scales. Maybe a small plug in power supply to operate the display lights. An LED area light. Seven hundred feet. I won't be taking less than 1/0 and would prefer to take 250s. The load will not get smaller and I can see heat in that little moveable garden shed they are planning. The little wood ones that look like small barns. It will keep getting bigger.

 

[petersonra]

All this is for is a camera system really wa giving them the option to add inte future but all I need now is enough current to operate the system

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Sounds like a lot of money to operate a camera. Will it work on 208 volts?

 

[ppsh]

4/0AL will keep you under 5%vd at 50a. At this size and distance, stepping up to 480v isn't cost effective, the transformers would cost more than the 4/0AL. Around $2500 in wire running 4/0. A 30kva 480-208/120y is about $2000 itself.

 

[nickelec]

Solar and battery?

I was thinking that and posted a question about that in another form. I know nothing about solar any idea what it would cost to set up

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[Barbqranch]

Instead of solar and a battery, how about provision for a battery charger, battery and inverter. Plan for 5 amp total.

 

[nickelec]

Can you post some products

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[petersonra]

A 30kva 480-208/120y is about $2000 itself.

Are you buying them gold plated or something?

 

[mbrooke]

Bigger wire, calc to make sure you do not exceed 5 seconds of trip time for a fault.

 

[mbrooke]

Depending on the nature of your load (lighting, motors, etc_) and the actual load, 4/0 or 250AL would likely be acceptable.
Transformers are a good method but at that load it might not be that economical.

4/0 AL phase - X= 0.041 R=0.10

2/0 AL ground- X= 0.043 R=0.16




Z= 0.0676 + 0.007056 squared

Z= 0.27 ohms

120/0.27= 444 amps

Going by this 444 amps is just a slight hair over 5 seconds:

https://library.industrialsolutions.abb.com/publibrary/checkout/GES-6203B?TNR=Time%20Current%20Curves%7CGES-6203B%7CPDF&filename=GES-6203B.pdf

Given wire will not be starting at 75*C during the fault, and the time current curve is based on max clearing vs max tripping I'd say 4/0-4/0-4/0-2/0 should have you fully covered as a minimum wire size.

 

[electrofelon]

Are you buying them gold plated or something?

I was going to say that price was real high (although I still think not worth transformers in this case).

 

[ptonsparky]

The little garden shed I mentioned back in post seven? It turned into make sure there is enough power for a 40x60 building.

I do have a business for sale, if you don’t want too much.

 

[Barbqranch]

And what do they want to do in the 40 x 60 foot building? Store old equipment with minimum lights, or have a grow house?

 

[ptonsparky]

And what do they want to do in the 40 x 60 foot building? Store old equipment with minimum lights, or have a grow house?

The only thing I doubt is the Grow House. But we do have a Hemp Processing Plant just down the road.

 

[petersonra]

And what do they want to do in the 40 x 60 foot building? Store old equipment with minimum lights, or have a grow house?

Maybe you should talk to him about running even larger wires just in case down the road you need more juice.