Dual Voltage Single Phase Motor only runs on 115v.?
Dual Voltage Single Phase Motor only runs on 115v.?
(OP)
Hello,
I have a dual voltage water pump motor that until recently ran on 230v. It stopped working recently and now will only run on 115v. There is an internal switch in the motor that can be set on 230v. or 115v. I have checked the line voltage going to the pressure switch and each leg reads 115v. The motor is only 1 year old and after disassembling it - it looks new inside, no burnt windings, etc.
Hoping someone can tell me what may have happened to it. I have not yet tested the function of the dual voltage switch but there is nothing that looks bad visually. The connections all appear to be solid. Anyone?
I have a dual voltage water pump motor that until recently ran on 230v. It stopped working recently and now will only run on 115v. There is an internal switch in the motor that can be set on 230v. or 115v. I have checked the line voltage going to the pressure switch and each leg reads 115v. The motor is only 1 year old and after disassembling it - it looks new inside, no burnt windings, etc.
Hoping someone can tell me what may have happened to it. I have not yet tested the function of the dual voltage switch but there is nothing that looks bad visually. The connections all appear to be solid. Anyone?





RE: Dual Voltage Single Phase Motor only runs on 115v.?
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RE: Dual Voltage Single Phase Motor only runs on 115v.?
Any other thoughts? Thank you.....
RE: Dual Voltage Single Phase Motor only runs on 115v.?
An issue is probably related to the switch.
A small correction: Auxiliary winding is always connected to 115 V ( either in LV or HV connection). That is usual connection of NEMA dual voltage, 1ph motors in order to avoid a use of second capacitor.
There is a drawback - a high capacitance is required.
Motor Repair and Winding Design
RE: Dual Voltage Single Phase Motor only runs on 115v.?
The run windings are connected in series for 230 Volts and in parallel for 115 Volts.
The start winding is typically a single 115 Volt winding. It is typically connected in parallel with one of the run windings so it always sees 115 Volts. As this winding always sees 115 Volts there is no need to change the start capacitor for 230 volt use.
I agree that your switch may have failed.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Dual Voltage Single Phase Motor only runs on 115v.?
RE: Dual Voltage Single Phase Motor only runs on 115v.?
BTW, there are such a motors.
Winding Data Calculations
RE: Dual Voltage Single Phase Motor only runs on 115v.?
Bill
--------------------
"Why not the best?"
Jimmy Carter