1-phase Power from a 3-phase generator
1-phase Power from a 3-phase generator
(OP)
Hello,
I have a 22kVA generator that is feeding a 3-phase 3kVA compressor. That means that there is 19kVA of leftover power. I wish to use this 19kVA to supply a single phase load. What is the best way to do this? Do I use a rectifier to convert three phase to Dc and then use an inverter to convert to 1-phase ac?
Does anyone have any suggestions?
Thanks
I have a 22kVA generator that is feeding a 3-phase 3kVA compressor. That means that there is 19kVA of leftover power. I wish to use this 19kVA to supply a single phase load. What is the best way to do this? Do I use a rectifier to convert three phase to Dc and then use an inverter to convert to 1-phase ac?
Does anyone have any suggestions?
Thanks






RE: 1-phase Power from a 3-phase generator
Your option of AC-DC-AC is expensive and maintenance prone.
RE: 1-phase Power from a 3-phase generator
thank you for your contribution!
My single phase load is several small single phase appliances plus 3 3kVA single phase pumps. I have tried to balance these loads equally among the three phases but the generator keeps tripping! Is this tripping avoidable?
Is it a negative sequence relay that is tripping in the generator unit?
So are you saying that the AC-DC-AC option is not advised?!
Thanks
RE: 1-phase Power from a 3-phase generator
I doubt a 22 KVA generator has a negative sequence relay.
RE: 1-phase Power from a 3-phase generator
I guess I should consider a means of starting the pumps so that I can limit the starting currents.
Let us say that I am running my three phase generator to supply an unbalanced 3-phase load. Will this damage my generator in the long run? Will it trip any of the breakers in my small 22kVA generator?
Thanks
RE: 1-phase Power from a 3-phase generator
RE: 1-phase Power from a 3-phase generator
RE: 1-phase Power from a 3-phase generator
You can use three transformers to create one, if not.
We use motor starters to reduce the starting surge on our generators.
RE: 1-phase Power from a 3-phase generator
Make sure the single phase motors are capacitor start, and not psc. If they are PSC with only a run capacitor, you can add a "hard start" kit from most any refrigeration supply to help start the motors. These are a starting capacitor and a relay which is connected in parallel with the run capacitor.