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256TTDX7391 – Marathon 10 HP Definite Purpose AC Motor, 3 phase, 1200 RPM, 230/460/796 V, 256T Frame, ODP – Y204

256TTDX7391 – Marathon 10 HP Definite Purpose AC Motor, 3 phase, 1200 RPM, 230/460/796 V, 256T Frame, ODP – Y204

256TTDX7391 Marathon Other Purpose Motors

Please advise CFM, static pressure, voltage, phase, and/or horsepower on specifications, drawings, or existing equipment for an accurate quote.

  • NEMA design D for extra high starting and breakdown torques
  • Normally closed thermostats (one per phase, Class F)
  • Fully guarded with screens on all external openings
  • Copper bar rotor on 500 frame
  • Low starting current with 5-8% slip
  • Class F insulation, F2 conduit box location
  • Shaft slinger
  • Special “oil well” duty
  • Ball bearings
  • Will become build-up item when current stock is gone

Marathon Motors
Regal Beloit

Description

256TTDX7391 – Marathon 10 HP Definite Purpose AC Motor, 3 phase, 1200 RPM, 230/460/796 V, 256T Frame, ODP – Y204

256TTDX7391 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: 722856043085 Weight: 462 LB
Packaged Length: 30.5 IN Packaged Width: 16.81 IN
Packaged Height: 14 IN

Nameplate Specifications

Output HP: 10 Hp Output KW: 7.5 kW
Frequency: 60 Hz Voltage: 230/460/796 V
Current: 29.0/14.5/8.4 A Speed: 1130 rpm
Service Factor: 1.15 Phase: 3
Efficiency: 86.5 % Power Factor: 75
Duty: Continuous Insulation Class: F
Design Code: D KVA Code: J
Frame: 256T Enclosure: Drip Proof
Thermal Protection: No Ambient Temperature: 40 °C
Drive End Bearing Size: 6309 Opp Drive End Bearing Size: 6208
UL: Recognized CSA: N
CE: N IP Code: 23

Technical Specifications

Electrical Type: Squirrel Cage Induction Run Starting Method: Across The Line
Poles: 6 Rotation: Reversible
Resistance Main: .805 Ohms Mounting: Rigid Base
Motor Orientation: Horizontal Drive End Bearing: Ball
Opp Drive End Bearing: Ball Frame Material: Rolled Steel
Shaft Type: T Overall Length: 23.04 in
Frame Length: 15.15 in Shaft Diameter: 1.625 in
Shaft Extension: 4.19 in Assembly/Box Mounting: F2-ODE-Box

Speed Characteristics

Curvepoint Current (Amps) Current (%) Torque (ft-lbs) (%) Speed (RPM) Rated Output (KW) Power Factor (%) Rated Output (Hp)
Locked-Rotor 97.00 669.0 130.00 281.0 0 52.0 10.00
Pull-Up 90.00 621.0 122.00 264.0 250 10.00
Break-Down 72.00 497.0 170.00 368.0 550 67.0 10.00
2/3 82.00 566.0 132.00 286.0 400 10.00
No Load 7.50 52.0 0.00 0.0 1,200 10.00
Full Load 14.50 100.0 46.20 100.0 1,130 10.00
1/3 95.00 655.0 120.00 260.0 100 10.00

Load Characteristics

% of Rated Load 0 % 25 % 50 % 75 % 100 % 115 % 125 %
Current (Amps) 7.50 8.00 9.50 11.80 14.50 16.20 17.50
Rated Output (KW) 0.40 2.30 4.20 6.40 8.60 10.00 11.00
Efficiency (%) 0.0 83.0 87.5 87.5 86.5 86.0 85.0
Power Factor (%) 7.0 35.5 56.0 68.5 75.0 77.5 78.5
Speed (RPM) 1,200 1,185 1,170 1,155 1,130 1,120 1,105
Temp. Rise @ FL 0.0 0.0 0.0 0.0 70.0 90.0 0.0
Torque (ft-lbs) 0.00 11.20 22.50 34.00 46.20 53.50 59.00

Marathon Motors
Regal Beloit