Description
284TTFNA7240 – Marathon 20,5 HP 2 speed Definite Purpose AC Motor, 3 phase, 1800/900 RPM, 460 V, 284T Frame, TEFC – Y385
284TTFNA7240 Marathon Other Purpose Motors
Please advise CFM, static pressure, voltage, phase, and/or horsepower on specifications, drawings, or existing equipment for an accurate quote.
General Specifications
| UPC: |
722856042262 |
Weight: |
489 LB |
| Packaged Length: |
35 IN |
Packaged Width: |
26 IN |
| Packaged Height: |
24.51 IN |
Nameplate Specifications
| Output HP: |
20,5 Hp |
Output KW: |
14.9 kW |
| Frequency: |
60/60 Hz |
Voltage: |
460 V |
| Current: |
24,8.5 A |
Speed: |
1775,880 rpm |
| Service Factor: |
1.15 |
Phase: |
3 |
| Efficiency: |
91.7 % |
Power Factor: |
84.5 |
| Duty: |
Continuous |
Insulation Class: |
F |
| Design Code: |
1VT |
KVA Code: |
J |
| 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 Induction Run |
Starting Method: |
Across The Line |
| Poles: |
4/8 |
Rotation: |
Reversible |
| Resistance Main: |
.505 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) |
| No Load |
9.50 |
40.0 |
0.00 |
0.0 |
1,800 |
|
|
20.00 |
| Full Load |
24.00 |
100.0 |
59.00 |
100.0 |
1,775 |
|
|
20.00 |
| Break-Down |
120.00 |
500.0 |
180.00 |
305.0 |
1,625 |
|
69.0 |
20.00 |
| Locked-Rotor |
180.00 |
750.0 |
105.00 |
178.0 |
0 |
|
40.0 |
20.00 |
| Pull-Up |
165.00 |
688.0 |
95.00 |
161.0 |
500 |
|
|
20.00 |
| 1/3 |
175.00 |
729.0 |
90.00 |
153.0 |
200 |
|
|
20.00 |
| 2/3 |
150.00 |
625.0 |
120.00 |
203.0 |
750 |
|
|
20.00 |
Load Characteristics
| % of Rated Load |
0 % |
25 % |
50 % |
75 % |
100 % |
115 % |
125 % |
| Current (Amps) |
9.50 |
11.00 |
15.00 |
19.00 |
24.00 |
27.50 |
30.00 |
| Rated Output (KW) |
0.75 |
4.50 |
8.40 |
12.50 |
16.50 |
19.00 |
20.50 |
| Efficiency (%) |
0.0 |
84.0 |
89.5 |
91.7 |
91.7 |
91.0 |
90.2 |
| Power Factor (%) |
8.0 |
50.0 |
71.0 |
80.0 |
84.5 |
85.5 |
86.0 |
| Speed (RPM) |
1,800 |
1,795 |
1,790 |
1,785 |
1,775 |
1,772 |
1,770 |
| Temp. Rise @ FL |
0.0 |
0.0 |
0.0 |
0.0 |
65.0 |
85.0 |
0.0 |
| Torque (ft-lbs) |
0.00 |
14.60 |
29.50 |
44.20 |
59.00 |
68.00 |
74.50 |
Marathon Motors
Regal Beloit
