Description
445TSTDS7303 – Marathon 250 HP Fire Pump Motor, 3 phase, 3600 RPM, 460 V, 445TS Frame, ODP – Y658
445TSTDS7303 Marathon Fire Pump Motors
General Specifications
| Packaged Length: |
44.88 IN |
Packaged Width: |
39.25 IN |
| Packaged Height: |
29.56 IN |
Nameplate Specifications
| Output HP: |
250 Hp |
Output KW: |
187 kW |
| Frequency: |
60/50 Hz |
Voltage: |
460 V |
| Current: |
275 A |
Speed: |
3565 rpm |
| Service Factor: |
1.15 |
Phase: |
3 |
| Efficiency: |
93.6 % |
Power Factor: |
90.5 |
| Duty: |
CONTINUOUS |
Insulation Class: |
F |
| Design Code: |
B |
KVA Code: |
F |
| Frame: |
445TS |
Enclosure: |
DP |
| Thermal Protection: |
NOT |
Ambient Temperature: |
40 °C |
| Drive End Bearing Size: |
6313 |
Opp Drive End Bearing Size: |
6313 |
| UL: |
No |
CSA: |
Y |
| CE: |
Y |
IP Code: |
12 |
Technical Specifications
| Electrical Type: |
SQ CAGE IND RUN |
Starting Method: |
PWS & YDRUN |
| Poles: |
2 |
Rotation: |
REV |
| Resistance Main: |
0.029 Ohms |
Mounting: |
RIGID |
| Motor Orientation: |
HORIZONTAL |
Drive End Bearing: |
BALL |
| Opp Drive End Bearing: |
BALL |
Frame Material: |
CAST IRON |
| Shaft Type: |
TS |
Overall Length: |
36 in |
| Frame Length: |
20.5 in |
Shaft Diameter: |
2.38 in |
| Shaft Extension: |
5 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) |
| Locked-Rotor |
1,760.00 |
640.0 |
580.00 |
158.0 |
0 |
|
37.0 |
250.00 |
| 2/3 |
1,500.00 |
545.0 |
610.00 |
166.0 |
2,400 |
|
|
250.00 |
| No Load |
22.00 |
8.0 |
0.00 |
0.0 |
3,600 |
|
|
250.00 |
| Full Load |
275.00 |
100.0 |
368.00 |
100.0 |
3,565 |
|
|
250.00 |
| 1/3 |
1,675.00 |
609.0 |
495.00 |
135.0 |
1,200 |
|
|
250.00 |
| Break-Down |
1,020.00 |
371.0 |
920.00 |
250.0 |
3,400 |
|
68.0 |
250.00 |
| Pull-Up |
1,585.00 |
576.0 |
525.00 |
143.0 |
1,800 |
|
|
250.00 |
Load Characteristics
| % of Rated Load |
0 % |
25 % |
50 % |
75 % |
100 % |
115 % |
125 % |
| Current (Amps) |
50.50 |
83.50 |
144.00 |
207.00 |
275.00 |
319.00 |
349.00 |
| Rated Output (KW) |
5.50 |
51.20 |
99.50 |
149.00 |
199.00 |
230.00 |
251.00 |
| Efficiency (%) |
0.0 |
91.0 |
93.6 |
94.1 |
93.6 |
93.0 |
93.0 |
| Power Factor (%) |
10.0 |
77.0 |
87.0 |
90.0 |
90.5 |
90.5 |
90.0 |
| Speed (RPM) |
3,600 |
3,590 |
3,582 |
3,572 |
3,565 |
3,555 |
3,550 |
| Temp. Rise @ FL |
0.0 |
0.0 |
0.0 |
0.0 |
60.0 |
80.0 |
100.0 |
| Torque (ft-lbs) |
0.00 |
102.00 |
183.00 |
276.00 |
368.00 |
425.00 |
462.00 |
Marathon Motors
Regal Beloit
