Marathon 25 HP Variable Speed Motor, 3 phase, 1800 RPM, 230/460 V, 284T Frame, TEFC - Y569

Catalog #:Y569
Part #:284THFPA8028
  • MAX GUARD® Class H insulation system
  • Constant torque operation from 0 to base speed on vector drive, including TEFC (On Volts/Hertz drives, TEFC motors are limited to 20:1 constant torque
  • Constant HP operation to twice base speed (143-256 frame);1.5 times base (all others)
  • Optimized for operation with IGBT inverter (NEMA Design A)
  • Normally closed thermostats (one per phase, class F)
  • Blue Chip quality, cast iron frame and brackets
  • Patented “fracket” design (TEBC enclosure)
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Weight:393.00 LB
List Price: $5,989.00

General Specifications

UPC: 722856025227 Weight: 393.00 LB
Packaged Length: 35 IN Packaged Width: 26 IN
Packaged Height: 21.14 IN

Nameplate Specifications

Output HP: 25 Hp Output KW: 18.7 kW
Frequency: 60 Hz Voltage: 230/460 V
Current: 63.0/31.5 A Speed: 1765 rpm
Service Factor: 1 Phase: 3
Efficiency: 91.7 % Power Factor: 82
Duty: Continuous Insulation Class: H
Design Code: INV 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: 43

Technical Specifications

Electrical Type: Squirrel Cage Inverter Duty Starting Method: Inverter Only
Poles: 4 Rotation: Reversible
Resistance Main: .325 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: 28.58 in
Frame Length: 12.75 in Shaft Diameter: 1.875 in
Shaft Extension: 4.81 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 182.00 578.0 147.00 198.0 0 39.5 25.00
Pull-Up 165.00 524.0 140.00 188.0 900 25.00
2/3 150.00 476.0 155.00 208.0 1,200 25.00
No Load 14.00 44.0 0.00 0.0 1,800 25.00
Break-Down 115.00 365.0 195.00 262.0 1,625 66.0 25.00
Full Load 31.50 100.0 74.40 100.0 1,765 25.00
1/3 175.00 556.0 130.00 175.0 600 25.00

Load Characteristics

% of Rated Load 0 % 25 % 50 % 75 % 100 % 125 % 150 % 200 %
Current (Amps) 14.00 15.50 20.00 25.00 31.50 39.00 46.50 66.50
Rated Output (KW) 0.75 5.50 10.00 15.00 20.50 25.50 31.20 43.50
Efficiency (%) 0.0 86.5 91.0 92.4 91.7 91.0 88.5 84.0
Power Factor (%) 6.0 43.0 65.0 75.5 82.0 82.5 84.0 81.5
Speed (RPM) 1,800 1,794 1,785 1,775 1,765 1,760 1,745 1,715
Temp. Rise @ FL 0.0 0.0 0.0 0.0 65.0 0.0 0.0 0.0
Torque (ft-lbs) 0.00 18.50 37.00 55.50 74.40 93.50 112.00 150.00
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