Premium Efficient
31NDM-3-250-12
250HP, 6P, 3Ph, 460V 60Hz, 380V 50Hz , 447/9TD, TEFC, F1, D-Flange, Premium Efficient Motor
Part Number
31NDM-3-250-12
Product Family
Premium Efficient
Series
31N Series
Horsepower
250
Phase
3
Synchronous Speed
1200
Nominal Speed
1185
Frequency
60
Voltage
460V 60Hz, 380V 50Hz
Frame
447/9TD
Frame Material
Cast Iron
Flange
D-Flange
Flange Type
'-
Feet
YES
Removable Feet
NO
Rotatable Feet
NO
Double Drilled Feet
YES
Winding Connection
Double Delta
Full Load Torque (lb-ft)
1109
Lock Rotor Torque (%)
160
Break Down Torque (%)
200
Full Load Amps
147 A @ 460V
LRA (%)
Lock Rotor Amps
Efficiency @ 100% Load
95.8
Power Factor @ 100% Load
83.5
kW @ 50 Hz
Synchronous Speed @ 50 Hz
1000
Nominal Speed @ 50 Hz
Full Load Torque (lb-ft) @ 50 Hz
Lock Rotor Torque (%) @ 50 Hz
Break Down Torque (%) @ 50 Hz
Full Load Amps @ 50 Hz
LRA (%) @ 50 Hz
Efficiency @ 100% Load 50 Hz
Power Factor @ 100% Load 50 Hz
Design Code
B
Duty Rating
Code Letter
B
Service Factor @ 60 Hz
1.15
Service Factor @ 50 Hz
1
Insulation Class
F
Inverter Rated
Bearings (DE / ODE)
6320Z/C3 (DE), 6316Z/C3 (ODE)
Impregnation Method
Dip and Bake
PTC Thermistors
Space Heater
Junction Box Material
Cast Iron
Fan Guard Material
Steel
Shaft Seal
Mounting Position
F1
Degree of Protection
IP55
Enclosure
TEFC
Finish
Blue
Net Weight (lbs)
2607
Ship Weight (lbs)
Warranty Period