Marathon 25 HP Fire Pump Motor, 3 phase, 3600 RPM, 230/460 V, 256T Frame, ODP - U500

Catalog #:U500
Part #:256TTDX4024
  • Red paint on 25 HP through 200 HP
  • NEMA Design B, Code G or less
  • Dual voltage motors have 12 leads, suitable for wye-delta or across the line start on either voltage, or part winding start on low voltage
  • Single voltage motors have 12 leads and are suitable for wye-delta, across the line, or part winding start
  • Will accept C-Face kits, see Accessories section for kits
  • 230/460 and 460 Volt models rated for 50 HZ at next lower HP, 1.15 SF
  • Will become build-up item when current stock is gone
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General Specifications

Weight: 164.00 LB Packaged Length: 26.88 IN
Packaged Width: 18.38 IN Packaged Height: 15 IN

Nameplate Specifications

Output HP: 25 Hp Output KW: 18.7 kW
Frequency: 60 Hz Voltage: 230/460 V
Current: 58.0/29.0 A Speed: 3520 rpm
Service Factor: 1.15 Phase: 3
Efficiency: 91 % Power Factor: 88.3
Duty: Continuous Insulation Class: B
Design Code: B KVA Code: G
Frame: 256T Enclosure: Drip Proof
Thermal Protection: No Ambient Temperature: 40 °C
Drive End Bearing Size: 6309 Opp Drive End Bearing Size: 6208
UL: No CSA: Y
CE: Y IP Code: 12

Technical Specifications

Electrical Type: Squirrel Cage Induction Run Starting Method: Wye Start Delta Run
Poles: 2 Rotation: Reversible
Resistance Main: .365 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: 22.32 in
Frame Length: 15.45 in Shaft Diameter: 1.625 in
Shaft Extension: 4.19 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)
Pull-Up 165.00 569.0 65.00 173.0 1,500 25.00
Break-Down 125.00 431.0 110.00 293.0 3,100 70.5 25.00
Locked-Rotor 182.00 628.0 72.00 192.0 0 41.5 25.00
No Load 9.50 33.0 0.00 0.0 3,600 25.00
2/3 150.00 517.0 77.00 205.0 2,100 25.00
1/3 175.00 603.0 62.00 165.0 1,000 25.00
Full Load 29.00 100.0 37.50 100.0 3,520 25.00

Load Characteristics

% of Rated Load 0 % 25 % 50 % 75 % 100 % 115 % 125 %
Current (Amps) 8.50 11.50 16.50 22.00 29.00 33.00 36.50
Rated Output (KW) 0.50 5.20 10.00 15.00 20.50 23.50 25.50
Efficiency (%) 0.0 89.5 91.0 92.4 91.0 91.0 90.2
Power Factor (%) 6.0 56.0 79.0 85.0 88.3 89.0 89.0
Speed (RPM) 3,600 3,580 3,565 3,545 3,520 3,510 3,500
Temp. Rise @ FL 0.0 0.0 0.0 0.0 55.0 65.0 80.0
Torque (ft-lbs) 0.00 9.20 18.50 28.00 37.50 43.00 47.00
Catalog #:U500A
Part #:256TTDBD4024
List Price: $3,124.00
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