Yep, this is a motor start capacitor IMHO, and the capacitance should be =
measured in microfarads, not nanofarads.  It definitely should not be =
shorted! =20

If I had to guess from the numbers I would guess 20uF.  You may be able =
to just plunk this down on the desk of an appliance repair or industrial =
motor outfit and they will say, "Well, that looks like one of these".  I =
don't think the value of these is critical, nor are the consequences of =
putting in the wrong capacitor.  Of course, it must be rated for AC =
voltage, or the consequences will be quite interesting!=20

-- Lawrence Lile, P.E.
Electrical and Electronic Solutions
Project Solutions Companies
www.projsolco.com

 -----Original Message-----
> From: M. Adam Davis [mailto:adampic@UBASICS.COM]
> Sent: Tuesday, August 17, 2004 7:19 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: [EE:] Motor start capacitor.
>=20
> My dryer quit recently - wouldn't start spinning every few loads, and
> would sometimes stop spinning during a load.  I disassembled it, found =
a
> bad drum support roller, and replaced both rollers, the belt, and the
> drum support slides on the front.
>=20
> Thinking all would be well, I assembled it and it has the same =
problem.
> If I start turning it by hand then it starts just fine.
>=20
> This all leads me to believe that the motor start capacitor is bad,
> though I don't have a lot of experience with AC motors so any other
> suggestions would be nice.
>=20
> The capacitor (I assume) in question is a small black 1cm x 2.5cm x
> 3.5cm plastic module with two leads.  They are essentially shorted - =
0.1
> ohm, with a capacitance measured in nF.
>=20
> Markings:
> 9820 T-D-D
> 20MCD3KA
>  058
> Another 058 is on another end of the package.
>=20
> I'd like to know if this is probably a capacitor, and what its value =
is
> likely to be, and whether the problems I'm experiencing are generally
> due to capacitor problems.
>=20
> Pictures can be found here
> http://ubasics.com/adam/cap/all.html
> about 7k for all of them.
>=20
> Thanks for your help!
>=20
> -Adam
>=20
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>=20
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>=20

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=20

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