Marathon 250 HP Explosion Proof Motor, 3 phase, 1800 RPM, 460 V, 449T Frame, EPFC - H502

Catalog #:H502
Part #:449TTGS7068
  • Meets NEMA Premium® efficiencies, Bearing Current Protection (BCP), as noted
  • 10:1 Variable torque, see Inverter Duty column for constant torque
  • MAX GUARD® Class F insulation
  • Blue Chip® quality, 100% cast iron construction for rigidity and reduced vibration
  • Internal and external surfaces treated with epoxy paint
  • 1.15 Service Factor on sinewave or 1.0 Service Factor on IBGT power
  • Precision balanced to .08”/sec, Extended grease tubes
  • Normally closed thermostats (must be connected to control circuit)
  • Meets temperature code T3B, Shaft slinger, Nameplated 60/50 Hz, 190/380 Volts, at next lower HP, as noted
  • Ball Bearings (except as noted), Ball Bearings (except as noted)
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General Specifications

UPC: 722856024053 Weight: 2,779.00 LB
Packaged Length: 56 IN Packaged Width: 46 IN
Packaged Height: 29.41 IN

Nameplate Specifications

Output HP: 250 Hp Output KW: 187.0 kW
Frequency: 60 Hz Voltage: 460 V
Current: 290.0 A Speed: 1785 rpm
Service Factor: 1 Phase: 3
Efficiency: 95 % Power Factor: 85
Duty: Continuous Insulation Class: F
Design Code: B KVA Code: F
Frame: 447/449T Enclosure: Explosion Proof Fan cooled
Thermal Protection: Thermostats (N/C) Ambient Temperature: 40 °C
Drive End Bearing Size: NU319 Opp Drive End Bearing Size: 6318
UL: UL Listed; also, UL Certified for Canada CSA: N
CE: N IP Code: 54
Hazardous Location: EXP PROOF CL I GR C&D CL II GR F&G T3B

Technical Specifications

Electrical Type: Squirrel Cage Inverter Rated Starting Method: Part Wdg Start & Wye Start Delta Run Or Inverter
Poles: 4 Rotation: Reversible
Resistance Main: .0134 Ohms Mounting: Rigid Base
Motor Orientation: Horizontal Drive End Bearing: Roller
Opp Drive End Bearing: Ball Frame Material: Cast Iron
Shaft Type: T Overall Length: 51.85 in
Frame Length: 28.75 in Shaft Diameter: 3.375 in
Shaft Extension: 8.76 in Assembly/Box Mounting: F1 ONLY

Speed Characteristics

Curvepoint Current (Amps) Current (%) Torque (ft-lbs) (%) Speed (RPM) Rated Output (KW) Power Factor (%) Rated Output (Hp)
Full Load 290.00 100.0 736.00 100.0 1,785 250.00
Break-Down 900.00 310.0 1,650.00 224.0 1,750 65.0 250.00
Pull-Up 1,550.00 534.0 1,200.00 163.0 900 250.00
2/3 1,500.00 517.0 1,300.00 177.0 1,200 250.00
1/3 1,600.00 552.0 1,100.00 149.0 600 250.00
No Load 85.00 29.0 0.00 0.0 1,800 250.00
Locked-Rotor 1,650.00 569.0 1,250.00 170.0 0 30.0 250.00

Load Characteristics

% of Rated Load 0 % 25 % 50 % 75 % 100 % 115 % 125 %
Current (Amps) 85.00 110.00 160.00 222.00 290.00 327.00 365.00
Rated Output (KW) 6.00 52.00 99.50 148.00 196.00 221.00 246.00
Efficiency (%) 0.0 89.5 93.6 94.5 95.0 95.0 94.5
Power Factor (%) 9.0 59.0 78.0 83.5 85.0 85.0 84.5
Speed (RPM) 1,800 1,795 1,792 1,788 1,785 1,780 1,775
Temp. Rise @ FL 0.0 50.0 45.0 0.0 80.0 110.0 0.0
Torque (ft-lbs) 0.00 183.00 366.00 551.00 736.00 829.00 922.00
Catalog #:E591
Part #:449TTGS16537
List Price: $40,361.00
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