Description
256THFNA9101 – Marathon 7.50 HP Severe Duty Motor, 3 phase, 900 RPM, 460 V, 256T Frame, TEFC – W536
256THFNA9101 Marathon IEEE 841 Motors
Please advise CFM, static pressure, voltage, phase, and/or horsepower on specifications, drawings, or existing equipment for an accurate quote.
General Specifications
| UPC: |
722856021113 |
Weight: |
340 LB |
| Packaged Length: |
30.75 IN |
Packaged Width: |
21.75 IN |
| Packaged Height: |
18 IN |
Nameplate Specifications
| Output HP: |
7.50 Hp |
Output KW: |
5.6 kW |
| Frequency: |
60 Hz |
Voltage: |
460 V |
| Current: |
11.0 A |
Speed: |
875 rpm |
| Service Factor: |
1.15 |
Phase: |
3 |
| Efficiency: |
88.5 % |
Power Factor: |
73 |
| Duty: |
Continuous |
Insulation Class: |
F |
| Design Code: |
B |
KVA Code: |
F |
| Frame: |
256T |
Enclosure: |
Totally Enclosed Fan Cooled |
| Thermal Protection: |
No |
Ambient Temperature: |
40 °C |
| Drive End Bearing Size: |
6309 |
Opp Drive End Bearing Size: |
6210 |
| UL: |
Recognized |
CSA: |
Y |
| CE: |
Y |
IP Code: |
56 |
Technical Specifications
| Electrical Type: |
Squirrel Cage Inverter Rated |
Starting Method: |
Line Or Inverter |
| Poles: |
8 |
Rotation: |
Reversible |
| Resistance Main: |
1.37 Ohms |
Mounting: |
Rigid Base |
| Motor Orientation: |
Horizontal |
Drive End Bearing: |
Ball |
| Opp Drive End Bearing: |
Ball |
Frame Material: |
Cast Iron |
| Shaft Type: |
T |
Overall Length: |
25.40 in |
| Frame Length: |
12.25 in |
Shaft Diameter: |
1.625 in |
| Shaft Extension: |
4.2 in |
Assembly/Box Mounting: |
F1/F2 Capable |
Speed Characteristics
| Curvepoint |
Current (Amps) |
Current (%) |
Torque (ft-lbs) |
(%) |
Speed (RPM) |
Rated Output (KW) |
Power Factor (%) |
Rated Output (Hp) |
| 2/3 |
48.00 |
436.0 |
85.00 |
189.0 |
600 |
|
|
7.50 |
| Locked-Rotor |
53.00 |
482.0 |
75.00 |
167.0 |
0 |
|
37.0 |
7.50 |
| Break-Down |
35.00 |
318.0 |
110.00 |
244.0 |
780 |
|
|
7.50 |
| 1/3 |
52.00 |
473.0 |
68.00 |
151.0 |
300 |
|
|
7.50 |
| Full Load |
11.00 |
100.0 |
45.00 |
100.0 |
875 |
|
|
7.50 |
| Pull-Up |
50.00 |
455.0 |
72.00 |
160.0 |
450 |
|
|
7.50 |
| No Load |
6.50 |
59.0 |
0.00 |
0.0 |
900 |
|
|
7.50 |
Load Characteristics
| % of Rated Load |
0 % |
25 % |
50 % |
75 % |
100 % |
115 % |
125 % |
| Current (Amps) |
6.50 |
7.00 |
8.00 |
9.50 |
11.00 |
12.50 |
13.50 |
| Rated Output (KW) |
0.50 |
1.50 |
3.00 |
4.50 |
6.50 |
7.50 |
8.00 |
| Efficiency (%) |
0.0 |
80.0 |
86.5 |
88.5 |
88.5 |
87.5 |
87.5 |
| Power Factor (%) |
6.0 |
31.5 |
50.5 |
63.0 |
73.0 |
73.0 |
74.0 |
| Speed (RPM) |
900 |
895 |
890 |
880 |
875 |
870 |
865 |
| Temp. Rise @ FL |
0.0 |
0.0 |
0.0 |
0.0 |
45.0 |
60.0 |
75.0 |
| Torque (ft-lbs) |
0.00 |
11.00 |
22.00 |
33.50 |
45.00 |
52.00 |
57.00 |
Marathon Motors
Regal Beloit
