Pole Pig Transformers
- Thread starter Steve from Socal
- Start date
OP
Steve from Socal
Well-known member
Norcal,
My use of the term "low voltage" was in regard to the 480/240v. I am aware that 600 VAC and under is classified as low voltage. With small machine tools "high/low voltage" with respect to their overloads etc is often used. My little shop here is all small machines and tools, 75HP and under.
Steve
My use of the term "low voltage" was in regard to the 480/240v. I am aware that 600 VAC and under is classified as low voltage. With small machine tools "high/low voltage" with respect to their overloads etc is often used. My little shop here is all small machines and tools, 75HP and under.
Steve
wyliesdiesels
Well-known member
With dry type x-formers you dont want to load them more than about 80%. Not sure what load you will be putting on it, but I wouldnt put more than about 150a continuous. IIRCC, the oil cooled x-formers are 300kva total so you would loose a LOT of capacity changing them out!!
Just the reason why i said high voltage line side metering, such as 12kv!
OP
Steve from Socal
Well-known member
The lighting and receptacle plan is still in flux, If I can find some 300VAC Edison bases I can use 277v CFL's My future plan is to split the 240/120 service into two feeds, one the small dry transformer and the other the current transformers.
I have about 45K sq ft and am a one man shop, my largest loads are my 60HP compressor and my 25HP mill and lathe. The only things I have wired 240 are a couple of 1HP chain hoists, my water heater and, my 5HP air compressor. I have a 15HP mill that was 240, it is being changed to 480. My lighting load is 28-105w CFLs, 46-55w CFL's and a couple dozen 4 and 8 foot strip fixtures. I am slowly relamping the strip fixtures with LED's.
Being a one man show I don't run everything at once and my shop is divided into areas, a machine tool room, sand blast and paint, welding and fab, mechanical and repair, warehousing, parking, precision grinding and office. Even with all these areas lit, electronics and appliances I have no more than 25% load on the dry transformer. The lighting load will increase over time and a fridge, washer/dryer etc but, still nowhere near the limits of capacity in the short term.
If my products are successful I would gladly turn the big transformers on if needed of course, I just don't see the need to pay a greedy utility a hefty demand charge just to keep them warm.
Steve
I have about 45K sq ft and am a one man shop, my largest loads are my 60HP compressor and my 25HP mill and lathe. The only things I have wired 240 are a couple of 1HP chain hoists, my water heater and, my 5HP air compressor. I have a 15HP mill that was 240, it is being changed to 480. My lighting load is 28-105w CFLs, 46-55w CFL's and a couple dozen 4 and 8 foot strip fixtures. I am slowly relamping the strip fixtures with LED's.
Being a one man show I don't run everything at once and my shop is divided into areas, a machine tool room, sand blast and paint, welding and fab, mechanical and repair, warehousing, parking, precision grinding and office. Even with all these areas lit, electronics and appliances I have no more than 25% load on the dry transformer. The lighting load will increase over time and a fridge, washer/dryer etc but, still nowhere near the limits of capacity in the short term.
If my products are successful I would gladly turn the big transformers on if needed of course, I just don't see the need to pay a greedy utility a hefty demand charge just to keep them warm.
Steve
wyliesdiesels
Well-known member
I have nothing useful to add, sorry. I just wanted to say, they make one hell of a Jacobs ladder.
Jacobs ladders are done with x-formers that have kv rated primaries. The OPs x-formers are only 480v on the high side!
I thought we were talking about the standard step down, power pole distribution transformer? 
Edit, never mind. That is what I get for not reading page two.
Off to go try to pull my foot out of my mouth....again.
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