Marathon 50 HP General Purpose, 3 phase, 1200 RPM, 230/460 V, 250M Frame, TEFC - R350

Catalog #:R350
Part #:250MTFC4586
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Weight:973.00 LB

General Specifications

Weight: 973.00 LB

Nameplate Specifications

Output HP: 50 Hp Output KW: 37 kW
Frequency: 60 Hz Voltage: 230/460 V
Current: 117/58.5 A Speed: 1185 rpm
Service Factor: 1.15 Phase: 3
Efficiency: 93 % Power Factor: 85.5
Duty: CONTINUOUS Insulation Class: F
Design Code: B KVA Code: G
Frame: 250M Enclosure: TEFC
Thermal Protection: NOT Ambient Temperature: 40 °C
Drive End Bearing Size: 6314 Opp Drive End Bearing Size: 6314
UL: Recognized CSA: Y
CE: Y IP Code: 55

Technical Specifications

Electrical Type: SQ CAGE INV RATED Starting Method: PWS & YDRUN OR INV
Poles: 6 Rotation: REV
Resistance Main: 0.138 Ohms Mounting: RIGID
Motor Orientation: HORIZONTAL OR SHAFT DOWN Drive End Bearing: BALL
Opp Drive End Bearing: BALL Frame Material: CAST IRON
Shaft Type: STANDARD IEC Overall Length: 36.02 in
Shaft Diameter: 2.56 in Shaft Extension: 5.51 in
Assembly/Box Mounting: F3

Speed Characteristics

Curvepoint Current (Amps) Current (%) Torque (ft-lbs) (%) Speed (RPM) Rated Output (KW) Power Factor (%) Rated Output (Hp)
2/3 300.00 513.0 475.00 215.0 800 50.00
Pull-Up 325.00 555.0 485.00 219.0 600 50.00
1/3 350.00 598.0 420.00 190.0 400 50.00
No Load 20.00 34.0 0.00 0.0 1,200 50.00
Full Load 58.50 100.0 221.00 100.0 1,190 50.00
Break-Down 230.00 393.0 640.00 290.0 1,120 70.0 50.00
Locked-Rotor 375.00 641.0 485.00 219.0 0 40.0 50.00

Load Characteristics

% of Rated Load 0 % 25 % 50 % 75 % 100 % 115 % 125 %
Current (Amps) 20.00 24.00 33.50 45.00 58.50 67.00 72.50
Rated Output (KW) 1.50 10.50 20.00 30.00 40.00 45.50 50.00
Efficiency (%) 0.0 88.5 92.4 93.6 93.0 93.0 93.0
Power Factor (%) 6.5 54.0 75.0 83.0 85.5 86.5 86.5
Speed (RPM) 1,200 1,196 1,193 1,190 1,185 1,184 1,180
Temp. Rise @ FL 0.0 0.0 0.0 0.0 50.0 65.0 80.0
Torque (ft-lbs) 0.00 55.00 110.00 166.00 221.00 255.00 278.00
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