Premium Efficient

31NDM-3-20-18

20HP, 4P, 3Ph, 208-230/460V 60Hz, 190/380V 50Hz , 256TD, TEFC, F1, D-Flange, Premium Efficient Motor

Elektrim Premium Efficient 31N Series TEFC 1800RPM cast iron D-flange electric motor is CSA certified for Class I Division II Group ABCD T3C, VFD 10:1CT & 100:1VT, UL Recognized.

PRODUCT GROUP

Premium Efficient

HP / OUTPUT

20

RPM

1800

PHASE

3

VOLTAGE

208-230/460V 60Hz, 190/380V 50Hz

FRAME

256TD

FLANGE

D-Flange

DEGREE OF PROTECTION

IP55

MOUNTING POSITION

F1

ENCLOSURE

TEFC

Part Number

31NDM-3-20-18

Product Family

Premium Efficient

Series

31N Series

Horsepower

20

Phase

3

Synchronous Speed

1800

Nominal Speed

1760

Frequency

60

Voltage

208-230/460V 60Hz, 190/380V 50Hz

Frame

256TD

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 / Delta

Full Load Torque (lb-ft)

59.7

Lock Rotor Torque (%)

220

Break Down Torque (%)

235

Full Load Amps

54.2 A @ 208V, 49 A @ 230V, 24.5 A @ 460V, 19.6 A @ 575V

LRA (%)

Lock Rotor Amps

290 A @ 230V, 145 A @ 460V

Efficiency @ 100% Load

93

Power Factor @ 100% Load

83.5

kW @ 50 Hz

Synchronous Speed @ 50 Hz

1500

Nominal Speed @ 50 Hz

1465

Voltage @ 50 Hz

Values

Full Load Torque (lb-ft) @ 50 Hz

Lock Rotor Torque (%) @ 50 Hz

Break Down Torque (%) @ 50 Hz

Full Load Amps @ 50 Hz

60.3 A @ 190V, 30.2 A @ 380V

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

1.25

Service Factor @ 50 Hz

1

Insulation Class

F

Inverter Rated

Bearings (DE / ODE)

6310ZZ (DE), 6208ZZ (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)

330

Ship Weight (lbs)

355

Warranty Period

3-Years