Hi.
A single phase 1/2HP motor selectable to wire/run on 115VAC or 230VAC. 8A/4A It is a 3450 RPM out of a deceased cracked water pump. Wire colors are faded, Has one capacitor and centrifugal switch.

How many windings should have ? Two? Four? More? Thin gauge and thick gauge coils? All same? Motor ran until opened to replace bearing and lubricate. Now buzzes loud when powered. Something may be disconnected by its wiring terminals. Any foolproof method to learn about it and identify winding ends ?

Lettersoup : Gould-Century jet pump duty motor, part 8-151817-20 Cat.No. B486 Frame C56C Form KJS Type CS Serial Y7 Encl. DP

 

No foolproof method because fools are too smart. DC resistance measurements one way. Mark the coil wires (inside directly on the wires leaving the motor coils to eliminate other crap) with numbers, then do resistance measurements. Build a resistance between wire marker numbers table for all possible combinations. Then ponder the universe of possibilities.

 

Go to the Gould site (Ontario) they have a link for service/product questions.

 

Hi.
A single phase 1/2HP motor selectable to wire/run on 115VAC or 230VAC. 8A/4A It is a 3450 RPM out of a deceased cracked water pump. Wire colors are faded, Has one capacitor and centrifugal switch.

How many windings should have ? Two? Four? More? Thin gauge and thick gauge coils? All same? Motor ran until opened to replace bearing and lubricate. Now buzzes loud when powered. Something may be disconnected by its wiring terminals. Any foolproof method to learn about it and identify winding ends ?

Lettersoup : Gould-Century jet pump duty motor, part 8-151817-20 Cat.No. B486 Frame C56C Form KJS Type CS Serial Y7 Encl. DP

What is the value/type of the capacitor? Is it a motor run or motor start capacitor?
If it is motor run then the centrifugal switch will switch out the starting winding.
There should be two running windings (lower resistance) and two starting windings (higher resistance) which are connected in series for 230V and parallel for 115V.

 

Thanks, fellows.

What is the value/type of the capacitor?

It is a 250μF which I believe corresponds to start use. Will check if can discern 4 windings; the ends are very buried tied-into the windings.

If there is a thicker wire winding; is it for start (auxiliary)? or for run (main)? Seen both colliding opinions.

Xa and Xm being each two equal windings in parallel for 120VAC ? Is this diagram valid for start capacitor ? Sc closed when stopped ?