Microshaped
Aluminum
- Joined
- Jul 19, 2014
- Location
- USA, IL
Good Evening all, I picked up a 15HP Motor off a farmers Old Grain Blower with a Data Tag stating the phase is 1 or 3 phase .... the motor and control box was made by Ronk Electrical Dated 1973 and for the price i could not pass it up, Figured it would be a great replacement for my American Rotary 5HP (My cnc Lathe just hates the slow ramp up on the spindle)
So got it all wired up and powered it up everything runs fine so I figured I could just tap the 3rd leg and pull it into my 3 phase breaker box wrong when I check the generated leg L1-L3 and L2-L3 383 volts then check L3 - ground its the same 383 Vac. I knew something was up so I pulled the motors wiring housing cover off making sure the motors windings was wired correctly and its only a 8 lead motor the diagram in the cover only has wiring diagram for single phase, But the schematics in the control box states it can be wired single or 3 Phase,
Before I call RONK and ask if they know anything about this has anyone ever seen a 8 Lead wiring for windings on a motor Or even a motor that states on the data plate that if can be wired as a single or 3 Phase motor?
Also the run cap bank in the control Box are only between L1- L3 could this just be a unbalanced issue adding caps to L2-L3 correct it.
Sorry for all the run on questions just frustrated.
Thank You
Matt
So got it all wired up and powered it up everything runs fine so I figured I could just tap the 3rd leg and pull it into my 3 phase breaker box wrong when I check the generated leg L1-L3 and L2-L3 383 volts then check L3 - ground its the same 383 Vac. I knew something was up so I pulled the motors wiring housing cover off making sure the motors windings was wired correctly and its only a 8 lead motor the diagram in the cover only has wiring diagram for single phase, But the schematics in the control box states it can be wired single or 3 Phase,
Before I call RONK and ask if they know anything about this has anyone ever seen a 8 Lead wiring for windings on a motor Or even a motor that states on the data plate that if can be wired as a single or 3 Phase motor?
Also the run cap bank in the control Box are only between L1- L3 could this just be a unbalanced issue adding caps to L2-L3 correct it.
Sorry for all the run on questions just frustrated.
Thank You
Matt
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