Bridgeport 3 phase motor - wiring

D

dansawyer

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I have a Bridgeport 3 phase motor from a BOSS 8 CNC Series 1 mill. Someone had disconnected the motor wiring from the junction box and I am left with 9 wires. My plan is to wire the motor for 3 phase 220V. I will be using a 3 phase VFD.
My questions are:
1. Are Bridgeports wired Delta or WYE?
2. How can I sort out the 9 wires to the correct configuration and connect the motor to the VFD.
Thanks, Dan
 
Wire nut 4 5 and 6 together. 1 and 7 will go to a leg(lets say L1), 2 and 8 will go to a leg (lets say L2), and 3 and 9 will go to a leg (lets say leg 3).

Jon
 
There are no numbers. Are they Delta or WHY?
 
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Damn, that sucks. Most Bridgeport motors have the numbers printed on the wires.

Id send it to a motor shop to have them figure it out.

Jon
 
You need to "ring out" the individual windings with an ohmmeter, then phase them, using a small transformer and the voltmeter
Details provided if you want to give it a go
-Mark
 
I think details of that process would be most welcome for future ref anyway, @markba633csi . Yes please!
 
OK will do, need to go pick up some cat meds first
If anyone else has done this also, feel free to jump in
-M
 
Belling out the pairs with a meter I've done, but the phasing with a lightbulb trick I'm interested in!
 
I used this video once (they have the Y one as well) and found it very helpful:
 
Thank you. Are Bridgeports typically configured as WYE or Delta?
I will be running the motor via a VFD, does that matter? Are VFD dependent on WYE or Delta or are VFD agnostic to WYE or Delta?
 
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