Compressor won't sstay running and trip breaker
I have a CH air compressor someone gave me.
Single Phase 120vac
The problem is that it won't stay running.
It will start, run for aproox 15 seconds and then trip the breaker.
I have disconnected and removed the piston to let the motor free wheel.
I have replaced both capacitors.
The circuit it is on is a 20 amp circuit.
I have unplugged everything else on the circuit, same problem.
The motor says it is 15 FLA.
Is the inrush current to high for a 20 amp breaker?
Are the windings shorted?
The motor spins fine by hand.
There is a intertia switch located on the back of the shaft.
I believe this is what changes from the start capacitor to the run capacitor.
Could this be bad?
Any hepl would be great
Single Phase 120vac
The problem is that it won't stay running.
It will start, run for aproox 15 seconds and then trip the breaker.
I have disconnected and removed the piston to let the motor free wheel.
I have replaced both capacitors.
The circuit it is on is a 20 amp circuit.
I have unplugged everything else on the circuit, same problem.
The motor says it is 15 FLA.
Is the inrush current to high for a 20 amp breaker?
Are the windings shorted?
The motor spins fine by hand.
There is a intertia switch located on the back of the shaft.
I believe this is what changes from the start capacitor to the run capacitor.
Could this be bad?
Any hepl would be great
Air Tools & Compressors - Dewalt - 2 Hp 4 GAL Air Compressor
Answers & Comments
You gave a lot of information, but you didn't say if it worked when free wheeling. If not, I would suspect the inertia switch. If it is working, you should hear it click when the motor is winding down after being shut off, at least when free wheeling. A 20 amp breaker will certainly handle a 15 FLA motor, even on startup. They don't trip at 20 amps exactly, especially on a simple overload. Even at twice the rated amperage, it can take several minutes to trip it. They will trip quickly on a dead short, however, or a severe overload. I doubt the windings are shorted or it either wouldn't work (start windings) or would run at a slower speed with the inertia switch constantly tripping in and out with it coasting while tripped in (i.e., accelerate, coast, accelerate, coast, etc.)