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Article #336

Re: pool motor starter cap

#336
From: Lord-Data
Date: Wed, 29 Dec 2004 07:40
59 lines
3319 bytes
"Chas" <umlaut@xxx.com.au> wrote in message 
news:41cfd840$1@dnews.tpgi.com.au...
>
> "sticks" <ksbutler@iinet.net.au> wrote in message
> news:41ce65cf$0$14450$5a62ac22@per-qv1-newsreader-01.iinet.net.au...
>> Hi all ,
>>
>> My pool pump has been playing up for a day or two , runs for an
>> hour or so then shuts down , (overheating)
>> I have taken motor out and the starter capacitor is ruptured i think it 
>> is
>> 60uF 450VAC cant read much else , motor is a 4.3Amp  Model LTP750 made bY
>> ONGA pumps .
>> My questions are
>>
>> 1. Should i just change starter capacitor and refit
>> 2. What could cause overheat problem ( bearings aside)
>> 3. Do i need exact replacement capacitor
>>
>> thanks
>>
>    Don't know the particular motor, but it seems possible that the failed
> capacitor is a "run" capacitor which should be constantly  in circuit with
> the second "run" winding  to provide phase shift to that winding.  The 
> motor
> would be in essence a pseudo two phase motor.  Failure of the capacitor
> would explain the overheating.  The voltage rating of 450v also indicates 
> a
> "run" cap, but 60 uf seems a bit high.??
>
> Failure of a "start" cap would mean the motor would not start, just hum &
> heat up.  I would expect a "start" cap to have a value of 150-200uf & 
> 250v.

Hrm .. sorry to hi-jack the thread a bit, but just curious .. If the starter 
cap is gone, would it cause it to start only sometimes?
perhaps failing/damaged but still able to work? Sometimes it starts fine, 
sometimes it does exactly what you said above .. humms for a while, then 
clicks off from overheating .. then re-tries a few mins later .. If you give 
it a flick by hand it will always start going .. and sometimes it starts 
fine, othertimes it jams like this ..

Where do you go to get a suitable starter cap if this is the case?

Thanks :)



>
> Have you considered contacting ONGA or one of their agents?
> -- 
> Regards, Chas.
>
>
> To Email, replace 'xxx' with tango papa golf.
>
>
> 
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From: "Lord-Data" <data@ihug.com.au>
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Subject: Re: pool motor starter cap
Date: Wed, 29 Dec 2004 18:40:12 +1100
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