Okay guys, I realise this is a little beyond the scope of what most do-it-yourselfers do but...
Here is what I need: I have a large home workshop that I will use for a variety of things including buying and refubishing surplus power equipment.
Some of the items will be permanently installed for example, a 10HP 3-phase air compressor, a 480V 3 phase parts washer (I currently have this) and a mix of other single and three phase appliances.
My utility company has given me several options including 480v/277v wye with a total of three transformers required. I was told that I could use one of the existing pole mounted transformers and just had to purchase two more. I am thinking that the 480/277 is the best option with a 75 amp @ 480v service entry to the building.
I know I can take one phase of the 480V (277V) for my lighting. I plan to run all my flourescent ballasts on this. However, in addition to the 480V
which I can run my compressor and parts washer on, I will need 240V single phase, 120V single phase and 208 v three phase.
I know that reduced voltages can be attained with dry transformers. This is where it gets tricky for me. I found a good deal on a 30KVA 480v in 208/120 v out unit that will take care of my 208 and 120 needs this covers everything except the 240 single phase requirement.
Will I need to buy a second transformer to convert 480v three phase to 240 single phase? Transformers aren't cheap is there a wiring trick someone can tell me about? Or can anyone recommend a tranformer that will provide 208V three phase, and 120 and 240 single phase.
Thanks
Here is what I need: I have a large home workshop that I will use for a variety of things including buying and refubishing surplus power equipment.
Some of the items will be permanently installed for example, a 10HP 3-phase air compressor, a 480V 3 phase parts washer (I currently have this) and a mix of other single and three phase appliances.
My utility company has given me several options including 480v/277v wye with a total of three transformers required. I was told that I could use one of the existing pole mounted transformers and just had to purchase two more. I am thinking that the 480/277 is the best option with a 75 amp @ 480v service entry to the building.
I know I can take one phase of the 480V (277V) for my lighting. I plan to run all my flourescent ballasts on this. However, in addition to the 480V
which I can run my compressor and parts washer on, I will need 240V single phase, 120V single phase and 208 v three phase.
I know that reduced voltages can be attained with dry transformers. This is where it gets tricky for me. I found a good deal on a 30KVA 480v in 208/120 v out unit that will take care of my 208 and 120 needs this covers everything except the 240 single phase requirement.
Will I need to buy a second transformer to convert 480v three phase to 240 single phase? Transformers aren't cheap is there a wiring trick someone can tell me about? Or can anyone recommend a tranformer that will provide 208V three phase, and 120 and 240 single phase.
Thanks