Description
256TTFNA14022 – Marathon 20 HP Fire Pump Motor, 3 phase, 3600 RPM, 230/460 V, 256T Frame, TEFC – Y1610
256TTFNA14022 Marathon Fire Pump Motors
General Specifications
| UPC: |
722856132550 |
Weight: |
682 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: |
46.5/23.2 A |
Speed: |
3525 rpm |
| Service Factor: |
1.15 |
Phase: |
3 |
| Efficiency: |
90.2 % |
Power Factor: |
88 |
| 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: |
2 |
Rotation: |
Reversible |
| Resistance Main: |
.465 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: |
12.44 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 |
80.00 |
345.0 |
72.00 |
240.0 |
3,250 |
|
71.0 |
20.00 |
| 2/3 |
110.00 |
475.0 |
45.00 |
150.0 |
2,400 |
|
|
20.00 |
| No Load |
6.20 |
26.5 |
0.00 |
0.0 |
3,600 |
|
10.0 |
20.00 |
| 1/3 |
130.00 |
562.0 |
36.00 |
120.0 |
1,200 |
|
|
20.00 |
| Locked-Rotor |
135.00 |
582.0 |
47.50 |
158.0 |
0 |
|
35.0 |
20.00 |
| Full Load |
23.20 |
100.0 |
30.00 |
100.0 |
3,525 |
|
88.0 |
20.00 |
| Pull-Up |
120.00 |
518.0 |
36.00 |
120.0 |
1,800 |
|
|
20.00 |
Load Characteristics
| % of Rated Load |
0 % |
25 % |
50 % |
75 % |
100 % |
115 % |
125 % |
| Current (Amps) |
6.20 |
8.50 |
12.80 |
18.00 |
23.20 |
27.00 |
29.20 |
| Rated Output (KW) |
1.00 |
4.50 |
8.50 |
12.50 |
16.50 |
19.00 |
21.00 |
| Efficiency (%) |
0.0 |
85.5 |
90.2 |
91.0 |
90.2 |
90.2 |
89.5 |
| Power Factor (%) |
10.0 |
65.0 |
81.0 |
87.0 |
88.0 |
88.5 |
88.5 |
| Speed (RPM) |
3,600 |
3,582 |
3,565 |
3,545 |
3,525 |
3,510 |
3,500 |
| Temp. Rise @ FL |
0.0 |
0.0 |
0.0 |
0.0 |
70.0 |
90.0 |
0.0 |
| Torque (ft-lbs) |
0.00 |
7.40 |
14.80 |
22.20 |
30.00 |
34.50 |
37.50 |
Marathon Motors
Regal Beloit
