Description
256TTFL4006 – Marathon 20 HP Close-Coupled Pump Motor, 3 phase, 3600 RPM, 230/460 V, 256JM Frame, TEFC – U351
256TTFL4006 Marathon JM Motors
General Specifications
| UPC: |
722856034403 |
Weight: |
232 LB |
| Packaged Length: |
31.25 IN |
Packaged Width: |
22.25 IN |
| Packaged Height: |
18 IN |
Nameplate Specifications
| Output HP: |
20 Hp |
Output KW: |
14.9 kW |
| Frequency: |
60/50 Hz |
Voltage: |
230/460 V |
| Current: |
47.0/23.5 A |
Speed: |
3510 rpm |
| Service Factor: |
1.15 |
Phase: |
3 |
| Efficiency: |
90.2 % |
Power Factor: |
87.5 |
| Duty: |
Continuous |
Insulation Class: |
F |
| Design Code: |
B |
KVA Code: |
G |
| Frame: |
256JM |
Enclosure: |
Totally Enclosed Fan Cooled |
| Thermal Protection: |
No |
Ambient Temperature: |
40 °C |
| Drive End Bearing Size: |
6309 |
Opp Drive End Bearing Size: |
6207 |
| UL: |
Recognized |
CSA: |
Y |
| CE: |
Y |
IP Code: |
43 |
Technical Specifications
| Electrical Type: |
Squirrel Cage Induction Run |
Starting Method: |
Across The Line |
| Poles: |
2 |
Rotation: |
Reversible |
| Resistance Main: |
.49 Ohms |
Mounting: |
Rigid Base |
| Motor Orientation: |
Horizontal |
Drive End Bearing: |
Ball |
| Opp Drive End Bearing: |
Ball |
Frame Material: |
Aluminum |
| Shaft Type: |
JM |
Overall Length: |
28.49 in |
| Frame Length: |
14.75 in |
Shaft Diameter: |
1.25 in |
| Shaft Extension: |
5.28 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) |
| Break-Down |
95.00 |
404.0 |
84.50 |
282.0 |
3,015 |
|
69.5 |
20.00 |
| Locked-Rotor |
145.00 |
617.0 |
58.00 |
193.0 |
0 |
|
42.5 |
20.00 |
Load Characteristics
| % of Rated Load |
0 % |
25 % |
50 % |
75 % |
100 % |
115 % |
125 % |
| Current (Amps) |
7.50 |
10.00 |
13.50 |
18.50 |
23.50 |
27.00 |
29.50 |
| Rated Output (KW) |
0.90 |
4.50 |
8.50 |
12.50 |
16.50 |
19.00 |
20.80 |
| Efficiency (%) |
0.0 |
84.0 |
89.5 |
90.2 |
90.2 |
89.5 |
88.5 |
| Power Factor (%) |
12.0 |
57.0 |
77.0 |
85.0 |
87.5 |
88.0 |
88.5 |
| Speed (RPM) |
3,600 |
3,580 |
3,560 |
3,535 |
3,510 |
3,500 |
3,485 |
| Temp. Rise @ FL |
0.0 |
0.0 |
0.0 |
0.0 |
75.0 |
105.0 |
0.0 |
| Torque (ft-lbs) |
0.00 |
7.50 |
15.00 |
22.50 |
30.00 |
34.50 |
37.50 |
Marathon Motors
Regal Beloit
