Description
256TTFNA14071 – Marathon 20 HP Fire Pump Motor, 3 phase, 1800 RPM, 230/460 V, 256T Frame, TEFC – Y1611
256TTFNA14071 Marathon Fire Pump Motors
General Specifications
| UPC: |
722856132567 |
Weight: |
331 LB |
| Packaged Length: |
30.75 IN |
Packaged Width: |
21.75 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: |
50.0/25.0 A |
Speed: |
1765 rpm |
| Service Factor: |
1.15 |
Phase: |
3 |
| Efficiency: |
91 % |
Power Factor: |
82 |
| 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: |
Listed |
CSA: |
Y |
| CE: |
Y |
IP Code: |
43 |
Technical Specifications
| Electrical Type: |
Squirrel Cage Induction Run |
Starting Method: |
Part Wdg Start Low Volt Only & Wye Start Delta Run |
| Poles: |
4 |
Rotation: |
Reversible |
| Resistance Main: |
.468 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: |
25.27 in |
| Frame Length: |
12.25 in |
Shaft Diameter: |
1.625 in |
| Shaft Extension: |
4.20 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 |
86.00 |
344.0 |
145.00 |
244.0 |
1,625 |
|
67.0 |
20.00 |
| 1/3 |
135.00 |
540.0 |
92.00 |
155.0 |
200 |
|
|
20.00 |
| Locked-Rotor |
140.00 |
560.0 |
108.00 |
182.0 |
0 |
|
41.5 |
20.00 |
| Full Load |
25.00 |
100.0 |
59.50 |
100.0 |
1,765 |
|
|
20.00 |
| 2/3 |
115.00 |
460.0 |
105.00 |
176.0 |
1,250 |
|
|
20.00 |
| No Load |
9.50 |
38.0 |
0.00 |
0.0 |
1,800 |
|
|
20.00 |
| Pull-Up |
125.00 |
500.0 |
94.00 |
158.0 |
900 |
|
|
20.00 |
Load Characteristics
| % of Rated Load |
0 % |
25 % |
50 % |
75 % |
100 % |
115 % |
125 % |
| Current (Amps) |
9.50 |
11.50 |
15.00 |
19.50 |
25.00 |
28.50 |
31.00 |
| Rated Output (KW) |
0.50 |
4.50 |
8.50 |
12.50 |
16.50 |
19.00 |
20.50 |
| Efficiency (%) |
0.0 |
85.5 |
90.2 |
91.0 |
91.0 |
90.2 |
89.5 |
| Power Factor (%) |
7.0 |
48.0 |
70.0 |
79.5 |
82.0 |
84.0 |
84.5 |
| Speed (RPM) |
1,800 |
1,790 |
1,785 |
1,775 |
1,765 |
1,760 |
1,755 |
| Temp. Rise @ FL |
0.0 |
0.0 |
0.0 |
0.0 |
70.0 |
90.0 |
105.0 |
| Torque (ft-lbs) |
0.00 |
14.50 |
29.50 |
44.50 |
59.50 |
68.50 |
75.00 |
Marathon Motors
Regal Beloit
