1.5 HP Delta Motor Capacitors Unplugged

Why should a 3Ph delta motor have a capacitor? 3 Ph motors don't need it generally.

Delta is the brand name not the winding setup, sorry. This is a duel voltage single phase motor.

Ok, Thanks for upgrading me.

Ozzb,

Thanks for the drawings,

In looking at the drawing for the duel voltage motor wired for high voltage I am a bit confused. I drew up the diagram and it appears that the start winding and the run capacitor winding are in series. If this is the case it seems the run cap would only be in the circuit until the start relay kicks out at speed. I am sure I am missing something hear but can't figure it out.

If its a duel voltage motor there may be two start cap. What is the capacitance on the two capacitors?

Truthfully one capacitor was missing which I assumed was the start cap the existing cap is 35 mfd which I assume is the run. Someone had a press with the same motor and gave me the start capacitor mfd which is 450 mfd. So it appears to be a run and start capacitor motor.

When I was referrring to the drawing I was talking about the one you had posted up. I have since done some more searching and it seems that the relay switch will take the start capacitor out of direct circuit with the start windings but when up to speed the start cap is still in the circuit but in series with the run capacitor. At least that is what I found on one site which does make sense after looking at it for a while. So I still don't know what I need to do with my motor. Will have to get the back cover off and see if I can figure out something. My resistance findings on the wires sticking out for the caps don't make sense and I seem to have different tag numbers on the wires than what I am seeing elsewhere. Maybe I am looking at them wrong will check again when I get home?

Thanks for the help so far.

here is the link to what appears to be a good drawing showing how a CSCR motor is wired up, just not my cscr motor.

http://www.pentairwater.com/pentekmotors/Assets/P8098TB_SMC_CSIR.pdf

Single phase 1.5 hp motors draw approx. 20amps @120vac so connecting 230vac would be better. So the connection is: Line 1 to T4 & T5; Tie T2, T3, & T8 together; Line 2 to T1. One end of the Run Capacitor attaches to the internal centrifical switch and to T5. The other end of the Run Capacitor ties to the Start Capacitor and to one end of the start winding. The other end of the Start Capacitor ties to the other side of the internal switch. T1 and T2 tie to a Run winding. T3 and T34 tie to the other Run Winding. T8 ties to the other end of the Start Winding. So with the internal switch closed (start position) the 2 capacitors are in parallel with each other which causes the capacitance to add. As the speed of the motor increases the internal switch opens and the start capacitor drops out leaving only the run capacitor in the circuit. A bleeder resistor is installed in parallel to the start capacitor to protect the switch contacts in case the motor is cycled. Typical values for the capacitors are 12k to 15k ohms. Good luck!

Appreciate the information. My motor is wired just as you stated. I didn't find a resistor though. The information you gave me on the capacitor wiring confirms what I have also come for capacitor wiring using the leads that were sticking out of the motor for each capacitor.

Thanks,

Don