Delta v. Wye and Equipment wear
Delta v. Wye and Equipment wear
(OP)
I have a 40hp motor that I plan to operate on 480v.
The name plate calls for a delta connection. My service options are 277/480 Y,. or 480 Delta (B phase grounded)
1. Will operating the motor using the 3 hots of the Y system have any adverse effects on the motor? (this will allow for lighting to run on 277 and eliminate the need for a step down xfmr.)
The name plate calls for a delta connection. My service options are 277/480 Y,. or 480 Delta (B phase grounded)
1. Will operating the motor using the 3 hots of the Y system have any adverse effects on the motor? (this will allow for lighting to run on 277 and eliminate the need for a step down xfmr.)






RE: Delta v. Wye and Equipment wear
RE: Delta v. Wye and Equipment wear
respectfully
RE: Delta v. Wye and Equipment wear
RE: Delta v. Wye and Equipment wear
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Sometimes I only open my mouth to swap feet...
RE: Delta v. Wye and Equipment wear
I will read the question correctly next time before jumping in.
I guess it was beacause 480 delta is not an option here in the UK so I assumed dedshort was talking about the motor connection.
RE: Delta v. Wye and Equipment wear
My concern was in regards to losing a leg and weather I would loose power to the entire motor v. a weakend voltage.
RE: Delta v. Wye and Equipment wear
Phase loss is a concern for motors, but is one that is typically ignored due to economics for motors in the 40 Hp range.
Regards,
JB
RE: Delta v. Wye and Equipment wear
RE: Delta v. Wye and Equipment wear
That remaining phase cannot develop a rotating magnetic field, only a pulsating one. I believe that rotation can be maintained if the motor is very lightly loaded when the phase loss happens, but can not be started.
At any rate, the motor will draw significant current in the circuit of the intact phase and produce little to no usefull work in this condition.
Regards,
JB
RE: Delta v. Wye and Equipment wear
RE: Delta v. Wye and Equipment wear