Re: Cap Start Motor

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Richard Modistach" <hambone-at-dodo-dot-com.au> 

in my opinion and experience it is not usual
for motors to be supplied without any relivant
capacitors required for starting or running, they are the
sort of thing that is usually kept with the motor
at all times as the motor is usless without them.
a bit like selling a perfectly good car without
the starter motor.
industrial motors have the cap under cover bolted
to the motor, smaller fractional hp motors such as
yours will usually have the cap remotly mounted.
you'll need to get the correct specs. on the motor
or a knowledgable electritian or even a motor rewinder
could tell you what to wire and what cap to use.
good luck.

regards
richard
aus






----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, May 07, 2004 11:47 PM
Subject: Cap Start Motor


 > Original poster: "Gerry Reynolds" <gerryreynolds-at-earthlink-dot-net>
 >
 > Hi all,
 >
 > I just received a Franklin Electric 1/12 HP cap start motor today that I
 > got off of ebay and it came with no wiring diagram.  There are four wires
 > from the motor (a RED(in) and BLACK(in) pair, and a BROWN and WHITE
 > pair).  The wart on top of the motor encases a switch looking device and
 > not the start cap that I was expecting (of course I have no hands on
 > experience with cap start motors).  Apparently the start cap is something
I
 > supply???  The RED(in) and BLACK(in) pair goes into this switch looking
 > device and I presume that the downstream side (a RED(out) and BLACK(out)
 > pair) of this device is the start winding.  The WHITE and BROWN pair must
 > then be the main winding.  The two windings are not seperate, but share a
 > common node (ie, BROWN and BLACK(out) are connected).  The resistance
 > between WHITE and BROWN is 11 ohms and the resistance between RED(out) and
 > BLACK(out) is 17 ohms.  The resistance between RED(out) and WHITE is 6
ohms
 > that makes me believe that this is a tapped winding.
 >
 > If this is the case, RED(out) would be the outer tap (wrt, the common
node)
 > and WHITE would be the inner tap.
 >
 > Could someone tell me if I have this correct that RED(out) and BLACK(out)
 > is the start winding and WHITE and BROWN (same as BLACK(out)) comprises
the
 > main winding?  This is also a thermal protected motor and I don't know if
 > this wart is related to thermal protection and the start winding switch is
 > internal or the other way around.  All pictures of cap start motors on
ebay
 > seem to have this wart.
 >
 > Also, is it customary that the start cap NOT be part of the motor?
 >
 > In addition, the name plate for the motor has the following:
 >
 > Model 1106680404
 > 1725/1450 rpm
 > Date code K88
 >
 > Many thanks,
 > Gerry R
 >
 >
 >