Description
256TTDX4020 – Marathon 25 HP Fire Pump Motor, 3 phase, 3600 RPM, 200/400 V, 256T Frame, ODP – U501
256TTDX4020 Marathon Fire Pump Motors
General Specifications
| UPC: |
722856035905 |
Weight: |
126 LB |
| Packaged Length: |
26.88 IN |
Packaged Width: |
18.38 IN |
| Packaged Height: |
15 IN |
Nameplate Specifications
| Output HP: |
25 Hp |
Output KW: |
18.7 kW |
| Frequency: |
60 Hz |
Voltage: |
200/400 V |
| Current: |
66.5/33.5 A |
Speed: |
3520 rpm |
| Service Factor: |
1.15 |
Phase: |
3 |
| Efficiency: |
91 % |
Power Factor: |
88.3 |
| Duty: |
Continous |
Insulation Class: |
B |
| Design Code: |
B |
KVA Code: |
G |
| Frame: |
256T |
Enclosure: |
Drip Proof |
| Thermal Protection: |
No |
Ambient Temperature: |
50 °C |
| Drive End Bearing Size: |
6309 |
Opp Drive End Bearing Size: |
6208 |
| UL: |
No |
CSA: |
Y |
| CE: |
Y |
IP Code: |
12 |
Technical Specifications
| Electrical Type: |
Squirrel Cage Induction Run |
Starting Method: |
Wye Start Delta Run |
| Poles: |
2 |
Rotation: |
Reversible |
| Resistance Main: |
.365 Ohms |
Mounting: |
Rigid Base |
| Motor Orientation: |
Horizontal |
Drive End Bearing: |
Ball |
| Opp Drive End Bearing: |
Ball |
Frame Material: |
Rolled Steel |
| Shaft Type: |
T |
Overall Length: |
22.32 in |
| Frame Length: |
15.45 in |
Shaft Diameter: |
1.625 in |
| Shaft Extension: |
4.19 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 |
9.50 |
33.0 |
0.00 |
0.0 |
3,600 |
|
|
25.00 |
| Break-Down |
125.00 |
431.0 |
110.00 |
293.0 |
3,100 |
|
70.5 |
25.00 |
| 2/3 |
150.00 |
517.0 |
77.00 |
205.0 |
2,100 |
|
|
25.00 |
| Full Load |
29.00 |
100.0 |
37.50 |
100.0 |
3,520 |
|
|
25.00 |
| Pull-Up |
165.00 |
569.0 |
65.00 |
173.0 |
1,500 |
|
|
25.00 |
| 1/3 |
175.00 |
603.0 |
62.00 |
165.0 |
1,000 |
|
|
25.00 |
| Locked-Rotor |
182.00 |
628.0 |
72.00 |
192.0 |
0 |
|
41.5 |
25.00 |
Load Characteristics
| % of Rated Load |
0 % |
25 % |
50 % |
75 % |
100 % |
115 % |
125 % |
| Current (Amps) |
9.78 |
13.23 |
18.98 |
25.30 |
33.35 |
37.95 |
41.98 |
| Rated Output (KW) |
0.50 |
5.20 |
10.00 |
15.00 |
20.50 |
23.50 |
25.50 |
| Efficiency (%) |
0.0 |
89.5 |
91.0 |
92.4 |
91.0 |
91.0 |
90.2 |
| Power Factor (%) |
6.0 |
56.0 |
79.0 |
85.0 |
88.3 |
89.0 |
89.0 |
| Speed (RPM) |
3,600 |
3,580 |
3,565 |
3,545 |
3,520 |
3,510 |
3,500 |
| Temp. Rise @ FL |
0.0 |
0.0 |
0.0 |
0.0 |
55.0 |
65.0 |
80.0 |
| Torque (ft-lbs) |
0.00 |
9.20 |
18.50 |
28.00 |
37.50 |
43.00 |
47.00 |
Marathon Motors
Regal Beloit
