It is pressure adjustable. To fix this problem raise the cut in pressure 2 or 3 pounds.
Contact re set for low pressure
the switch may be sticking, however most common is the pressure bladder tank leaking or wrong pressure, a second pressure switch is usually not needed. Check the points if this has been working, they may have been damaged by age or your long spring can be to tight not allowing the pressure switch to separate and shut pump motor down.
No. 120 volt or 220 volt.
It is set to cut off at 50 and cut in or start at 30 psi, but when the pressure goes below 30 to about 23-25. Then it just turns off. Then you have to manually start the switch until it reaches the cut in pressure of 30 psi.