Marathon 20 HP Automotive Duty Motor, 3 phase, 1800 RPM, 460 V, 286U Frame, TEFC - P445

Catalog #:P445
Part #:286UTFPA4026
  • Cast iron construction
  • Oversized, fully gasketed, cast iron conduit box
  • Oversized ball bearings
  • NEMA Design B
  • Class F insulation
  • V-Ring shaft seals
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General Specifications

UPC: 722856060655 Weight: 636.00 LB
Packaged Length: 35 IN Packaged Width: 26 IN
Packaged Height: 23.72 IN

Nameplate Specifications

Output HP: 20 Hp Output KW: 14.9 kW
Frequency: 60 Hz Voltage: 460 V
Current: 24.1 A Speed: 1775 rpm
Service Factor: 1 Phase: 3
Efficiency: 93 % Power Factor: 84
Duty: Continuous Insulation Class: F
Design Code: B KVA Code: G
Frame: 286U Enclosure: Totally Enclosed Fan Cooled
Thermal Protection: No Ambient Temperature: 65 °C
Drive End Bearing Size: 6311 Opp Drive End Bearing Size: 6210
UL: Recognized CSA: Y
CE: Y IP Code: 43

Technical Specifications

Electrical Type: Squirrel Cage Induction Run Starting Method: Across The Line
Poles: 4 Rotation: Reversible
Resistance Main: .474 Ohms Mounting: Rigid Base
Motor Orientation: Horizontal Drive End Bearing: Ball
Opp Drive End Bearing: Ball Frame Material: Cast Iron
Shaft Type: U Overall Length: 28.06 in
Frame Length: 14.25 in Shaft Diameter: 1.625 in
Shaft Extension: 5.08 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 86.00 357.0 146.00 247.0 1,625 66.0 20.00
2/3 105.00 436.0 115.00 194.0 1,200 20.00
Locked-Rotor 138.00 573.0 104.00 176.0 0 40.0 20.00
Full Load 24.10 100.0 59.20 100.0 1,775 20.00
1/3 125.00 519.0 90.00 152.0 600 20.00
Pull-Up 115.00 477.0 100.00 169.0 900 20.00
No Load 8.50 35.0 0.00 0.0 1,800 20.00

Load Characteristics

% of Rated Load 0 % 25 % 50 % 75 % 100 % 115 % 125 %
Current (Amps) 8.50 10.50 14.00 18.50 24.10 27.00 30.00
Rated Output (KW) 0.60 4.00 8.00 12.00 16.00 18.00 20.50
Efficiency (%) 0.0 90.0 93.0 93.6 93.0 92.4 91.7
Power Factor (%) 8.5 51.0 72.0 81.0 84.0 84.5 85.0
Speed (RPM) 1,800 1,795 1,785 1,780 1,775 1,770 1,760
Temp. Rise @ FL 0.0 0.0 0.0 0.0 55.0 75.0 90.0
Torque (ft-lbs) 0.00 14.50 29.50 44.50 59.20 68.00 74.50
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