South bend motor wires no labels 16/24

[Saberstar]

South bend motor wires have some labels missing from the wiring.
I did an ohm check and get an ohm readings on 2 sets of 3 wires. Tested the ohms against other wires and I get 0. 1 set of wires is higher ohm then the other. I assume this is a high/low.
Which is high and which low? The higher ohm set would be high?

 

[Dobermann]

I think you'll find that the higher resistance coil readings represent the lower speed set of windings since for lower speed there will be more coils engaged---as for example an 1800 RPM motor (1750 nameplate) will have 4 poles for each phase while a 1200 RPM motor (1150 typical nameplate) will have 6 poles for each phase. 900 RPM equates to 8 poles.

From the nameplate picture it appears that you have a single voltage motor so you don't have the added complication of multiple coil sets for two line voltages. A multi-speed, multi-voltage 3 phase motor could cause you to tear out your hair if the lead tags are missing!

 

[johnoder]

My Post #3 might be helpful

WIRING FOR SB 16/24 3 PHASE LATHE

RESTORING A 16/24 SOUTH BEND, AND WRITING FADED ON MY LABELS WHEN I TOOK THE MOTOR OUT TO CLEAN. THE LATHE HAS FRONT START/STOP AND LOW/HIGH SPEED SWITCHES. NEED TO KNOW HOW TO HOOKUP THE 6 LEADS TO THE MOTOR. I CAN READ DIAGRAMS . . . HAS 3 HP 3 PHASE MOTOR BILL

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