On Fri, 04 Jul 2008 00:54:21 -0400, Stuart Wheaton
wrote:

Stuart Wheaton wrote:
Wes wrote:
Uncle's 5hp single phase motor for his A.O. Dobbs table saw (big
sucker) croaked on him so
he went down to the scrap yard and bought a 5 hp 3 phase motor.
I looked at the partially marked wires and the data plate and did my
best to figure out it
was low voltage wired. Tip is that 3 wires together. From what I can
see, your normal 3
phase motor has once set of windings internally connected to form a
wye. From there you
either add in series another winding to each leg of the wye for HV or
you build another
wye out of the three other windings and parallel them.

The three phase motor I was setting up earlier this week had 9 leads.
For Low Voltage three of those leads tied together, and each incoming
phase was tied to a pair of the remaining leads. I don't recall the
numbers right now, but I can stop by the shop over the weekend and take
a quick read of the Data plate if you need it.

Appending my last post...


The NEMA standard for connections for 3 phase motors (LOW VOLTAGE) is L1
(1&7) L2 (2&8) L3 (3&9) tie together (4,5,6)

Correct.


The nema standard numbering for the windings is 7,8,9 internally tied
Wye, 1&4, 2&5, 3&6.


Stuart

Gunner, with 3 pallets of 3ph motors to sell, or give away, most NOS,
and includes a number of servos..been left out in the weather for a
few years, but internally are fine.

"The American people will never knowingly adopt socialism, but under the
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until one day America will be a socialist nation without ever knowing how it
happened." -- Norman Thomas, American socialist