[GreenKeys] is my Model 15 motor shot?

[John Nagle]

   4 ohms is normal.  3.7 doesn't sound too bad.  Set up a test
fixture with a 5 amp fast-blow breaker and turn it on.

   Is this a standard GE synchronous motor?  Those do fail,
usually because the centrifugal starting switch fails.
Those motors start as induction motors and run as synchronous.
During the starting phase, there's some arcing from the
starting switch.  If there's visible arcing after the first
two seconds, the starting switch didn't trip.  A failed motor
may still run, but weakly and below synchronous speed. It
may also run in reverse.  (Which doesn't damage a Model 15,
incidentally; they thought of that.)

				John Nagle

On 04/07/2017 06:59 AM, greenkeys-request at mailman.qth.net wrote:
> Message: 4
> Date: Wed, 5 Apr 2017 22:54:03 +0000 (UTC)
> From: Reggie Moody <moody1951 at bellsouth.net>
> To: <greenkeys at mailman.qth.net>
> Subject: [GreenKeys] is my Model 15 motor shot?
> Message-ID: <697661800.228741.1491432843042 at mail.yahoo.com>
> Content-Type: text/plain; charset=UTF-8
>
> Measured 3.7 ohms across model 15 motor windings. Seems low. Could it be shorted?
>