Description
256TTFNA7250 – Marathon 15,3.75 HP 2 speed Definite Purpose AC Motor, 3 phase, 1800/900 RPM, 460 V, 256T Frame, TEFC – Y384
256TTFNA7250 Marathon Other Purpose Motors
Please advise CFM, static pressure, voltage, phase, and/or horsepower on specifications, drawings, or existing equipment for an accurate quote.
General Specifications
| UPC: |
722856042255 |
Weight: |
381 LB |
| Packaged Length: |
31.25 IN |
Packaged Width: |
22.25 IN |
| Packaged Height: |
18 IN |
Nameplate Specifications
| Output HP: |
15,3.75 Hp |
Output KW: |
11.2 kW |
| Frequency: |
60/60 Hz |
Voltage: |
460 V |
| Current: |
18,6 A |
Speed: |
1770,875 rpm |
| Service Factor: |
1.15 |
Phase: |
3 |
| Efficiency: |
90.2 % |
Power Factor: |
87 |
| Duty: |
Continuous |
Insulation Class: |
F |
| Design Code: |
1VT |
KVA Code: |
J |
| 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: |
55 |
Technical Specifications
| Electrical Type: |
Squirrel Cage Induction Run |
Starting Method: |
Across The Line |
| Poles: |
4/8 |
Rotation: |
Reversible |
| Resistance Main: |
.82 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) |
| No Load |
6.50 |
36.0 |
0.00 |
0.0 |
1,800 |
|
|
15.00 |
| Break-Down |
85.00 |
472.0 |
140.00 |
315.0 |
1,550 |
|
74.0 |
15.00 |
| Pull-Up |
120.00 |
667.0 |
85.00 |
191.0 |
900 |
|
|
15.00 |
| 1/3 |
135.00 |
750.0 |
90.00 |
202.0 |
600 |
|
|
15.00 |
| 2/3 |
105.00 |
583.0 |
95.00 |
213.0 |
1,200 |
|
|
15.00 |
| Full Load |
18.00 |
100.0 |
44.50 |
100.0 |
1,770 |
|
|
15.00 |
| Locked-Rotor |
145.00 |
806.0 |
110.00 |
247.0 |
0 |
|
46.0 |
15.00 |
Load Characteristics
| % of Rated Load |
0 % |
25 % |
50 % |
75 % |
100 % |
115 % |
125 % |
| Current (Amps) |
6.50 |
7.80 |
10.50 |
14.00 |
18.00 |
20.50 |
22.00 |
| Rated Output (KW) |
0.50 |
3.40 |
6.30 |
9.40 |
12.50 |
14.50 |
15.80 |
| Efficiency (%) |
0.0 |
84.0 |
89.5 |
90.2 |
90.2 |
90.2 |
89.5 |
| Power Factor (%) |
8.5 |
53.0 |
74.5 |
83.5 |
87.0 |
88.5 |
89.0 |
| Speed (RPM) |
1,800 |
1,792 |
1,785 |
1,775 |
1,770 |
1,762 |
1,758 |
| Temp. Rise @ FL |
0.0 |
0.0 |
0.0 |
0.0 |
70.0 |
90.0 |
0.0 |
| Torque (ft-lbs) |
0.00 |
11.00 |
22.00 |
33.50 |
44.50 |
51.50 |
56.00 |
Marathon Motors
Regal Beloit
