240V from 120V generator
I would love to be able to use the 6KW quiet diesel in my motorhome as a backup generator at the house. One problem is that the house needs 240V while the generator makes 120V. I have not had good l...
Forum Discussion
There are some good options here. What I am leaning towards right now is this:
30A isolation transformer
Bearing in mind that in a home 240V is created by using two 120V legs that are 180 degrees out of phase all that really needs to happen is use the raw output of the generator for one leg and then change the phase of a portion of the output 180 degrees for the other leg. About 30 years ago I sat through a roughly 15 minute lecture on isolation transformers and as I recall they change the phase the required amount. I have been trying to confirm my memory and make sure that this transformer is suitable but since might be considered an "off label" application information is scarce. I like the idea that only half the power gets transformed so transformer losses are reduced.
Plus, the Quiet Diesel has two 35A outputs so I could use one output for each leg without messing with the setup of the generator. As far as I know these two outputs are in phase and come from the same source. They are simply there to power the two different circuits in the motorhome but I can't get Cummins to comment on this and I would rather not find out the hard way.
30A isolation transformer
Bearing in mind that in a home 240V is created by using two 120V legs that are 180 degrees out of phase all that really needs to happen is use the raw output of the generator for one leg and then change the phase of a portion of the output 180 degrees for the other leg. About 30 years ago I sat through a roughly 15 minute lecture on isolation transformers and as I recall they change the phase the required amount. I have been trying to confirm my memory and make sure that this transformer is suitable but since might be considered an "off label" application information is scarce. I like the idea that only half the power gets transformed so transformer losses are reduced.
Plus, the Quiet Diesel has two 35A outputs so I could use one output for each leg without messing with the setup of the generator. As far as I know these two outputs are in phase and come from the same source. They are simply there to power the two different circuits in the motorhome but I can't get Cummins to comment on this and I would rather not find out the hard way.
