Marathon 25 HP General Purpose Motor, 3 phase, 1800 RPM, 208-230/460 V, 284T Frame, TEFC - E961C

Catalog #:E961C
Part #:284TTFC6027
  • Meets or exceeds NEMA Premium® efficiencies NEMA Premium® models are in compliance with EISA2007
  • Cast iron frame and brackets
  • Inverter Duty 10:1 Variable Torque and 10:1 Constant Torque, 1.0 SF (except as noted)
  • 1.15 Service Factor
  • Class F Insulation
  • Standard assembly F1, reversible to F2 assembly
  • UL Recognized, CSA Certified and CE Mark
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General Specifications

UPC: 722856017482

Nameplate Specifications

Output HP: 25 Hp Output KW: 18.7 kW
Frequency: 60 Hz Voltage: 208-230/460 V
Current: 66-58.5/29.3 A Speed: 1782 rpm
Service Factor: 1.15 Phase: 3
Efficiency: 93 % Power Factor: 78
Duty: CONTINUOUS Insulation Class: F
Design Code: B KVA Code: H
Frame: 284T Enclosure: TEFC
Thermal Protection: NOT Ambient Temperature: 40 °C
Drive End Bearing Size: 6311 Opp Drive End Bearing Size: 6309
UL: Recognized CSA: Y
CE: Y IP Code: 43

Technical Specifications

Electrical Type: SQ CAGE INV RATED Starting Method: LINE OR INVERTER
Poles: 4 Rotation: REV
Resistance Main: 0.058 Ohms Mounting: RIGID
Motor Orientation: HORIZONTAL Drive End Bearing: BALL
Opp Drive End Bearing: BALL Frame Material: CAST IRON
Shaft Type: T Overall Length: 26.26 in
Shaft Diameter: 1.88 in Shaft Extension: 4.87 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)
2/3 170.00 580.0 150.00 204.0 1,200 25.00
Locked-Rotor 200.00 683.0 145.00 197.0 0 25.00
Full Load 29.30 101.0 73.50 100.0 1,783 25.00
Break-Down 130.00 444.0 225.00 306.0 1,700 25.00
Pull-Up 180.00 614.0 130.00 177.0 900 25.00
No Load 12.00 41.0 0.00 0.0 1,800 25.00
1/3 190.00 648.0 125.00 170.0 600 25.00

Load Characteristics

% of Rated Load 0 % 25 % 50 % 75 % 100 % 115 % 125 %
Current (Amps) 12.00 14.50 18.50 24.00 29.50 34.00 36.00
Rated Output (KW) 0.60 5.40 10.00 15.00 20.00 23.00 25.00
Efficiency (%) 0.0 88.5 93.6 94.1 93.6 93.6 93.6
Power Factor (%) 5.5 46.5 69.0 80.0 84.4 86.5 87.5
Speed (RPM) 1,800 1,792 1,783 1,775 1,770 1,767 1,762
Temp. Rise @ FL 0.0 0.0 0.0 0.0 44.0 60.0 75.0
Torque (ft-lbs) 0.00 18.60 37.50 56.00 73.50 84.50 93.50
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