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Capacitor keeps going bad? #164490
06/04/07 06:51 PM
06/04/07 06:51 PM
S
sid123456  Offline OP
Member
Joined: Jan 2005
Posts: 71
Florida
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?

Work Gear for Electricians and the Trades
Re: Capacitor keeps going bad? [Re: sid123456] #164500
06/04/07 07:23 PM
06/04/07 07:23 PM
N
NJwirenut  Offline
Member
Joined: Sep 2001
Posts: 806
Bergen County, NJ
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 09:04 PM
06/04/07 09:04 PM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,251
Estero,Fl,usa
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 06:05 AM
06/05/07 06:05 AM
R
RODALCO  Offline
Member
Joined: Dec 2005
Posts: 856
Titirangi, Akld, New Zealand
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 09:43 PM
06/05/07 09:43 PM
W
wendel  Offline
Member
Joined: Aug 2004
Posts: 55
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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