Description
256TTDBD4024 – Marathon 25 HP Fire Pump Motor, 3 phase, 3600 RPM, 230/460 V, 256T Frame, ODP – U500A
256TTDBD4024 Marathon Fire Pump Motors
General Specifications
| UPC: |
722856067241 |
Weight: |
274 LB |
| Packaged Length: |
27.55 IN |
Packaged Width: |
24.21 IN |
| Packaged Height: |
24.4 IN |
Nameplate Specifications
| Output HP: |
25 Hp |
Output KW: |
18.7 kW |
| Frequency: |
60/50 Hz |
Voltage: |
230/460 V |
| Current: |
58.0/29.0 A |
Speed: |
3545 rpm |
| Service Factor: |
1.15 |
Phase: |
3 |
| Efficiency: |
91 % |
Power Factor: |
88 |
| Duty: |
Continuous |
Insulation Class: |
F |
| Design Code: |
B |
KVA Code: |
F |
| Frame: |
256T |
Enclosure: |
Drip Proof |
| Thermal Protection: |
No |
Ambient Temperature: |
50 °C |
| Drive End Bearing Size: |
6209 |
Opp Drive End Bearing Size: |
6208 |
| UL: |
Listed |
CSA: |
Y |
| CE: |
Y |
IP Code: |
23 |
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: |
.635 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: |
24.22 in |
| Frame Length: |
12.20 in |
Shaft Diameter: |
1.625 in |
| Shaft Extension: |
4.00 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) |
| Full Load |
29.00 |
100.0 |
37.20 |
100.0 |
3,545 |
|
88.0 |
25.00 |
| Break-Down |
105.00 |
|
92.00 |
250.0 |
3,350 |
|
72.0 |
25.00 |
| Locked-Rotor |
175.00 |
|
56.00 |
150.0 |
0 |
|
44.0 |
25.00 |
| 2/3 |
145.00 |
|
60.00 |
|
2,400 |
|
|
25.00 |
| 1/3 |
170.00 |
|
48.00 |
|
1,200 |
|
|
25.00 |
| Pull-Up |
160.00 |
|
48.00 |
|
1,800 |
|
|
25.00 |
| No Load |
9.80 |
|
0.00 |
0.0 |
3,600 |
|
7.0 |
25.00 |
Load Characteristics
| % of Rated Load |
0 % |
25 % |
50 % |
75 % |
100 % |
115 % |
125 % |
| Current (Amps) |
9.80 |
12.00 |
16.50 |
22.50 |
29.00 |
33.50 |
36.50 |
| Rated Output (KW) |
0.75 |
5.50 |
10.20 |
15.50 |
20.50 |
23.90 |
26.00 |
| Efficiency (%) |
0.0 |
87.5 |
90.2 |
91.0 |
91.0 |
90.2 |
89.5 |
| Power Factor (%) |
7.0 |
57.0 |
77.0 |
85.0 |
88.0 |
89.0 |
89.0 |
| Speed (RPM) |
3,600 |
3,585 |
3,575 |
3,560 |
3,545 |
3,535 |
3,525 |
| Temp. Rise @ FL |
0.0 |
0.0 |
0.0 |
0.0 |
40.0 |
55.0 |
65.0 |
| Torque (ft-lbs) |
0.00 |
9.20 |
18.50 |
27.80 |
37.20 |
42.80 |
46.50 |
Marathon Motors
Regal Beloit
