Premium Efficient
31NFM-3-250-18
250HP, 4P, 3Ph, 460V 60Hz, 380V 50Hz , 447/9T, TEFC, F1, Foot Mounted, Premium Efficient Motor
Elektrim Premium Efficient 31N Series TEFC 1800RPM cast iron foot mounted electric motor is CSA certified for Class I Division II Group ABCD T3C, VFD 10:1CT & 100:1VT, UL Recognized.
Part Number
31NFM-3-250-18
Product Family
Premium Efficient
Series
31N Series
Horsepower
250
Phase
3
Synchronous Speed
1800
Nominal Speed
1780
Frequency
60
Voltage
460V 60Hz, 380V 50Hz
Frame
447/9T
Frame Material
Cast Iron
Flange
-
Flange Type
-
Feet
YES
Removable Feet
NO
Rotatable Feet
NO
Double Drilled Feet
YES
Winding Connection
Double Delta
Full Load Torque (lb-ft)
736.4
Lock Rotor Torque (%)
180
Break Down Torque (%)
200
Full Load Amps
146 A @ 460V
LRA (%)
Lock Rotor Amps
Efficiency @ 100% Load
96.2
Power Factor @ 100% Load
84.5
kW @ 50 Hz
Synchronous Speed @ 50 Hz
1500
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