stantonlw
Member
- Location
- Alexandria Va and Crawfordville Fl
I've read the old thread on open "Y" Open "Delta" (ie., using two distribution phases to provide "3 ph" power) but still have a question.
Here in Northern Fla we have a power company using open delta to provide small amounts of 3 ph power. PEPCO, in my area, says they don't provide it. Dominion Vepco says they do but only small services (< 200A), with warning that it may damage equipment such as motors and compressors. Progress energy (the supplier here) says it works for small 3 ph motors but cannot tell me how large and wonders why I have any questions.
Question is: What is "small" ie., how large a motor can be used safely?
I have been asked to help a small business (Wakulla Dive Center) get up and running in a new facility which has a 225A "Open Delta" "three phase" . This business will be using a 20hp 3ph air compressor and a 10 hp 3ph air compressor which might occasionally start up at the same time. They will frequently be both on line.
Will this be a problem (with a 250A service)? The upgrade cost is rather high for a small business.
Laird Stanton
If this question is unsuited to this forum, perhaps one of your members could respond via PM
Thanks,
Here in Northern Fla we have a power company using open delta to provide small amounts of 3 ph power. PEPCO, in my area, says they don't provide it. Dominion Vepco says they do but only small services (< 200A), with warning that it may damage equipment such as motors and compressors. Progress energy (the supplier here) says it works for small 3 ph motors but cannot tell me how large and wonders why I have any questions.
Question is: What is "small" ie., how large a motor can be used safely?
I have been asked to help a small business (Wakulla Dive Center) get up and running in a new facility which has a 225A "Open Delta" "three phase" . This business will be using a 20hp 3ph air compressor and a 10 hp 3ph air compressor which might occasionally start up at the same time. They will frequently be both on line.
Will this be a problem (with a 250A service)? The upgrade cost is rather high for a small business.
Laird Stanton
If this question is unsuited to this forum, perhaps one of your members could respond via PM
Thanks,
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