Standard

NEMA MG-1

Frequency

60//50 Hz

Voltage

230/460//380 V

Number of poles

8

Degree of Protection

IP55

Synchronous speed

900 rpm

Output rating

7.5 HP

Mounting

Foot-mounted

Flange

Without

Mounting

F-1

Terminal box¹

Left position

Enclosure

IC411 - TEFC

Frame Material

Cast Iron 

Impregnation Method

Dip and Bake Polyester 

Main terminal box hole

NPT 1 1/2" 

Terminal Block

Without 

Shaft Locking Device

Without 

Drain

Sinterized, Exd 

Shaft Material

SAE 1040/45 Carbon Steel 

Painting

RAL 5009 202P (ISO 12944 - C4) 

Grounding Lugs

Single 

Fan Cover material

Cast Iron 

Tropicalized Painting

Without 

Fan material

Plastic 

Bearing cap

Yes- Bearing Cap 

Bolt Material

Carbon Steel 

Winding thermal protection

Thermostat - 2 wires 1 per phase 155°C 

Balancing Method

1/2 Key 

Drip Cover

Without 

Overload protector (phenolic)

Without overload protector  

Connection Cables Quantity

12 

Frame

256T

Output

7.5 HP (5.5 kW)

Number of Poles

8

Frequency

50 Hz

Rated speed

715 rpm

Slip

4.67 %

Rated voltage

380 V

Rated current

13.7 A

L. R. Amperes

58.9 A

LRC

4.3x(Code F)

No load current

7.50 A

Rated torque

55.1 ft.lb

Locked rotor torque

160 %

Breakdown torque

180 %

Locked rotor time

39s (cold) 22s (hot)

Moment of inertia (J)

3.41 sq.ft.lb

Design

B

Insulation Class

F

Service factor

1.15

Temperature rise

80 K

Duty Cycle

Cont.(S1)

Starting Method

Direct On Line

Ambient temperature

-20°C to +40°C

Altitude

1000 m.a.s.l.

Degree of Protection

IP55

Enclosure

IC411 - TEFC

Mounting

F-1

Rotation¹

Both (CW and CCW)

Noise level²

53.0 dB(A)

Approx. weight³

320 lb

Frame

256T

Output

7.5 HP (5.5 kW)

Number of Poles

8

Frequency

60 Hz

Rated speed

875 rpm

Slip

2.78 %

Rated voltage

230/460 V

Rated current

22.5/11.2 A

L. R. Amperes

117/58.4 A

LRC

5.2x(Code G)

No load current

14.5/7.25 A

Rated torque

45.0 ft.lb

Locked rotor torque

190 %

Breakdown torque

270 %

Locked rotor time

73s (cold) 41s (hot)

Moment of inertia (J)

3.41 sq.ft.lb

Design

B

Insulation Class

F

Service factor

1.15

Temperature rise

80 K

Duty Cycle

Cont.(S1)

Starting Method

Direct On Line

Ambient temperature

-20°C to +40°C

Altitude

1000 m.a.s.l.

Degree of Protection

IP55

Enclosure

IC411 - TEFC

Mounting

F-1

Rotation¹

Both (CW and CCW)

Noise level²

55.0 dB(A)

Approx. weight³

320 lb

50%

75%

100%

80.0 

84.0 

82.5 

50%

75%

100%

83.4 

85.9 

86.5 

50%

75%

100%

0.54 

0.66 

0.74 

50%

75%

100%

0.51 

0.63 

0.71 

Bearing type

6309 2RS C3 

6209 2RS C3 

Sealing

Oil Seal 

Lip Seal 

Lubrication interval

- 

- 

Lubricant amount

- 

- 

Grease Type

Mobil Polyrex EM