250 volt 3ph air compressor
- Thread starter james g
- Start date
- Occupation
- Licensed Electrician
If it has start capacitors it's not three phase. It may have a three phase starter wired up to single phase.
How old is it? When did this start happening?
It could be a bad bearing in the motor, it could be a problem with the unloader for the compressor, it could be a loose connection in the circuit, or it could be a worn out starting switch in the motor.
How old is it? When did this start happening?
It could be a bad bearing in the motor, it could be a problem with the unloader for the compressor, it could be a loose connection in the circuit, or it could be a worn out starting switch in the motor.
ptonsparky
Tom
- Occupation
- EC - retired
- Location
- Bremerton, Washington
250 v is an uncommon secondary voltage. I agree picture of nameplate would be useful
Joethemechanic
Senior Member
- Location
- Hazleton Pa
- Occupation
- Electro-Mechanical Technician. Industrial machinery
Assuming it's single phase, are you sure it's a starting capacitor? If you mistakenly replace a run capacitor with a start capacitor they don't last very long. Usually a start capacitor will be plastic, and a run capacitor will be metal.
Start
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hillbilly1
Senior Member
- Location
- North Georgia mountains
- Occupation
- Owner/electrical contractor
Abnormally frequent starts will also blow the capacitors. They either need to add tank capacity, or change to an air screw compressor.
We have no idea what kind of compressor it is. Requested in post 4.