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HI there,
First post here. I hope I can get out into the forum and provide some answers to you in the future.
I am an Electrician here In Australia and spent my career so far in Industrial.
Currently I have a job which is putting me to the test so I thought someone might be able to offer some advice to me.
The situation:
A customer who is a Hydroponic farmer currently has "2 Phase" "Split phase" (480V) Whichever you like to call it. Three phase isn't available as it's in a rural area and the power is coming in via a SWER line. (Single wire Earth return)
He has approx 12Kw of pumps on one of the phases + House. The other phase has the processing machinery (only runs 3 Days a week) and refrigeration.
He approached me to install a three phase generator with auto start on the farm.
I can see installing a 2 phase Genny will come up, But they are expensive compared to a three phase here as 2 phase isn't common at all these days.
So My question for the Control forum so I can proceed with how to design this is.
1 - Is having unbalanced Phases on a generator detrimental to the life of it (30-40kVA)
2- If each phase has to be balanced, How close can they be. ~10-15%
3- What is an acceptable startup current ( imagine 10 Pumps firing up at once)
4- If I need to balance the load out, As processing happens only three times per week, + 1 phase won't even be connected. What can I use- IE just go run a few big resistors to "waste" the power?
Please feel free to ask for more information!!
Thanks
First post here. I hope I can get out into the forum and provide some answers to you in the future.
I am an Electrician here In Australia and spent my career so far in Industrial.
Currently I have a job which is putting me to the test so I thought someone might be able to offer some advice to me.
The situation:
A customer who is a Hydroponic farmer currently has "2 Phase" "Split phase" (480V) Whichever you like to call it. Three phase isn't available as it's in a rural area and the power is coming in via a SWER line. (Single wire Earth return)
He has approx 12Kw of pumps on one of the phases + House. The other phase has the processing machinery (only runs 3 Days a week) and refrigeration.
He approached me to install a three phase generator with auto start on the farm.
I can see installing a 2 phase Genny will come up, But they are expensive compared to a three phase here as 2 phase isn't common at all these days.
So My question for the Control forum so I can proceed with how to design this is.
1 - Is having unbalanced Phases on a generator detrimental to the life of it (30-40kVA)
2- If each phase has to be balanced, How close can they be. ~10-15%
3- What is an acceptable startup current ( imagine 10 Pumps firing up at once)
4- If I need to balance the load out, As processing happens only three times per week, + 1 phase won't even be connected. What can I use- IE just go run a few big resistors to "waste" the power?
Please feel free to ask for more information!!
Thanks