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Capacitor keeps going bad? #164490 06/04/07 05:51 PM
Joined: Jan 2005
Posts: 71
S
sid123456 Offline OP
Member
A friend of mine called me, asking me why his customer's pool pump capacitor keeps going bad every 3 to 6 months. I told him that it was possibly a surge or a loose return path. I haven't come across this myself.

Any ideas?

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Re: Capacitor keeps going bad? [Re: sid123456] #164500 06/04/07 06:23 PM
Joined: Sep 2001
Posts: 806
N
NJwirenut Offline
Member
Check the centrifugal switch for binding or welded contacts.

If the cap doesn't get switched out of the circuit once the motor is up to speed, it will burn up quickly.

Re: Capacitor keeps going bad? [Re: NJwirenut] #164510 06/04/07 08:04 PM
Joined: Jul 2004
Posts: 9,569
G
gfretwell Offline
Member
Also check the centrifugal actuator for the switch, If that binds up it won't open the switch.


Greg Fretwell
Re: Capacitor keeps going bad? [Re: gfretwell] #164521 06/05/07 05:05 AM
Joined: Dec 2005
Posts: 860
R
RODALCO Offline
Member
And check the voltage rating of the capacitor too. To be on the safe side it should be about 1.5 times the nominal mains voltage.
For 230 Volts a 400 V cap.
For 120 Volts a 200 or 250 V cap.


The product of rotation, excitation and flux produces electricty.
Re: Capacitor keeps going bad? [Re: sid123456] #164539 06/05/07 08:43 PM
Joined: Aug 2004
Posts: 55
W
wendel Offline
Member
Is this a PSC motor? The capacitor would remain in the circuit. Could low voltage cause excessive current draw and wear out the capacitor sooner?


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