Marathon 25 HP Fire Pump Motor, 3 phase, 3600 RPM, 230/460 V, 256T Frame, ODP - U500A

Catalog #:U500A
Part #:256TTDBD4024
  • Designed for use on pumps for fire pump duty
  • UL file EX5190, CSA file LR2025 and CE mark
  • 50°C ambient
  • Red paint on 25 HP through 200 HP
  • NEMA Design B, Code G or less
  • Will accept C-Face kits, see Accessories section for kits
  • Single voltage motors have 12 leads and are suitable for wye-delta, across the line, or part winding start
  • 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
  • Rated 60/50 hertz, 190/380 or 380 volt at next lower horsepower
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Weight:274 LB
List Price: $3,124.00

General Specifications

UPC: 722856067241 Weight: 274 LB
Packaged Length: 27.55 IN Packaged Width: 24.21 IN
Packaged Height: 24.4 IN

Nameplate Specifications

Output HP: 25 Hp Output KW: 18.7 kW
Frequency: 60/50 Hz Voltage: 230/460 V
Current: 58.0/29.0 A Speed: 3545 rpm
Service Factor: 1.15 Phase: 3
Efficiency: 91 % Power Factor: 88
Duty: Continuous Insulation Class: F
Design Code: B KVA Code: F
Frame: 256T Enclosure: Drip Proof
Thermal Protection: No Ambient Temperature: 50 °C
Drive End Bearing Size: 6209 Opp Drive End Bearing Size: 6208
UL: Listed CSA: Y
CE: Y IP Code: 23

Technical Specifications

Electrical Type: Squirrel Cage Induction Run Starting Method: Part Wdg Start Low Volt Only & Wye Start Delta Run
Poles: 2 Rotation: Reversible
Resistance Main: .635 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: 24.22 in
Frame Length: 12.20 in Shaft Diameter: 1.625 in
Shaft Extension: 4.00 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)
Full Load 29.00 100.0 37.20 100.0 3,545 88.0 25.00
Break-Down 105.00 92.00 250.0 3,350 72.0 25.00
Locked-Rotor 175.00 56.00 150.0 0 44.0 25.00
2/3 145.00 60.00 2,400 25.00
1/3 170.00 48.00 1,200 25.00
Pull-Up 160.00 48.00 1,800 25.00
No Load 9.80 0.00 0.0 3,600 7.0 25.00

Load Characteristics

% of Rated Load 0 % 25 % 50 % 75 % 100 % 115 % 125 %
Current (Amps) 9.80 12.00 16.50 22.50 29.00 33.50 36.50
Rated Output (KW) 0.75 5.50 10.20 15.50 20.50 23.90 26.00
Efficiency (%) 0.0 87.5 90.2 91.0 91.0 90.2 89.5
Power Factor (%) 7.0 57.0 77.0 85.0 88.0 89.0 89.0
Speed (RPM) 3,600 3,585 3,575 3,560 3,545 3,535 3,525
Temp. Rise @ FL 0.0 0.0 0.0 0.0 40.0 55.0 65.0
Torque (ft-lbs) 0.00 9.20 18.50 27.80 37.20 42.80 46.50
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