Description
284TTFNA16832 – Marathon 25 HP Severe Duty Motor, 3 phase, 1800 RPM, 230/460 V, 284T Frame, TEFC – U873A
284TTFNA16832 Marathon Low Voltage NEMA Cooling Tower Motors
Please advise CFM, static pressure, voltage, phase, and/or horsepower on specifications, drawings, or existing equipment for an accurate quote.
General Specifications
| UPC: |
722856018854 |
Weight: |
468 LB |
| Packaged Length: |
35 IN |
Packaged Width: |
26 IN |
| Packaged Height: |
24.51 IN |
Nameplate Specifications
| Output HP: |
25 Hp |
Output KW: |
18.7 kW |
| Frequency: |
60/50 Hz |
Voltage: |
230/460 V |
| Current: |
62.0/31.0 A |
Speed: |
1772 rpm |
| Service Factor: |
1.15 |
Phase: |
3 |
| Efficiency: |
93.6 % |
Power Factor: |
81 |
| Duty: |
Continuous |
Insulation Class: |
F |
| Design Code: |
B |
KVA Code: |
G |
| Frame: |
284T |
Enclosure: |
Totally Enclosed Fan Cooled |
| Thermal Protection: |
No |
Ambient Temperature: |
40 °C |
| Drive End Bearing Size: |
6311 |
Opp Drive End Bearing Size: |
6210 |
| UL: |
Recognized |
CSA: |
Y |
| CE: |
Y |
IP Code: |
55 |
Technical Specifications
| Electrical Type: |
Squirrel Cage Inverter Rated |
Starting Method: |
Line Or Inverter |
| Poles: |
4 |
Rotation: |
Reversible |
| Resistance Main: |
.271 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: |
26.21 in |
| Frame Length: |
12.75 in |
Shaft Diameter: |
1.875 in |
| Shaft Extension: |
4.82 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 |
108.00 |
348.0 |
185.00 |
250.0 |
1,662 |
|
66.0 |
25.00 |
| No Load |
13.00 |
41.9 |
0.00 |
0.0 |
1,800 |
|
3.0 |
25.00 |
| Full Load |
31.00 |
100.0 |
74.00 |
100.0 |
1,772 |
|
81.0 |
25.00 |
| Pull-Up |
169.00 |
545.0 |
117.00 |
158.0 |
900 |
|
|
25.00 |
| Locked-Rotor |
182.00 |
590.0 |
138.00 |
186.0 |
0 |
|
33.0 |
25.00 |
| 1/3 |
179.00 |
577.0 |
117.00 |
158.0 |
600 |
|
|
25.00 |
| 2/3 |
160.00 |
516.0 |
124.00 |
168.0 |
1,200 |
|
|
25.00 |
Load Characteristics
| % of Rated Load |
0 % |
25 % |
50 % |
75 % |
100 % |
115 % |
125 % |
| Current (Amps) |
13.00 |
15.00 |
19.10 |
24.60 |
31.00 |
35.00 |
40.00 |
| Rated Output (KW) |
0.60 |
5.30 |
10.00 |
15.00 |
20.00 |
23.20 |
25.30 |
| Efficiency (%) |
0.0 |
90.2 |
93.6 |
94.1 |
93.6 |
93.0 |
93.0 |
| Power Factor (%) |
3.0 |
43.0 |
65.5 |
76.0 |
81.0 |
82.5 |
83.0 |
| Speed (RPM) |
1,800 |
1,793 |
1,787 |
1,780 |
1,772 |
1,767 |
1,763 |
| Temp. Rise @ FL |
0.0 |
0.0 |
0.0 |
0.0 |
60.0 |
80.0 |
95.0 |
| Torque (ft-lbs) |
0.00 |
18.30 |
37.00 |
55.50 |
74.00 |
85.50 |
93.00 |
Marathon Motors
Regal Beloit
