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ASCO Avtron 5500 Trailer Load Bank (500kW)

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3,000.00 LBS

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The ASCO Avtron 5500 (K580) Trailer Load Bank is designed for mobile applications and offers a max capacity up to 500kW. Available with or without a trailer.


  • Load Capacity: Max capacity of 500kW at 240 & 480 VAC 3PH 60Hz. Derates to 375kW at 208VAC 3PH 60Hz.
  • Duty Cycle: Rated for continuous operation.
  • Load Step Resolution: 5kW minimum.
  • Controller: Local manual toggle switch controller. Controls include: Power On/Off switch, Blower Start/ Stop push buttons, Master Load On/Off switch, and Individual Load Step switches. Visual indicators include: Power On, Blower On, and Blower/Air Failure. See Options below for optional digital controls.
  • Instrumentation: Advanced Digital Monitoring System (ADMS) is provided for display of Volts, Amps, Frequency, and kW. Includes Data Logging Software.
  • Control Power: An Integral Dual Voltage Control Power Transformer is provided for control circuit operation.
  • Cooling Power: Blower motor is factory-wired to the main load bus.
  • Cooling: Approximately 13,000 CFM cooling is provided by integral TEFC or TEAO motor which is direct coupled to the cooling fan blade. Horizontal airflow and discharge. The fan motor is fully protected with fuses, motor starter contractor, and overload relay.
  • Load Elements: ASCO Avtron brand load banks use helically wound chromium alloy Helidyne elements. Elements are fully supported across their entire length by segmented ceramic insulators on stainless steel rods.
  • Safety Features: Branch circuit fusing, a differential pressure switch provides cooling air loss protection, an over-temperature switch is provided to sense load bank exhaust temperature, blower motor circuit is protected by current limiting fuses, and thermal overload relays, operator warning and caution statements are located on appropriate access panels.
  • Load Connections: Cam-type quick-connect male cable receptacles are securely mounted to the cool air intake side of the load bank. Three cam-connections per phase plus two ground.
  • Enclosure: Heavy-gauge aluminized steel outdoor enclosure with high quality baked polyester powder coated finish. Designed for continuous outdoor weatherproof operation. Removable travel covers for the intake and exhaust louvers. Forklift channels are provided in the base for lifting.


  • Heavy duty welded construction with steel deck, dual axles, radial tires, and 4400 lbs. GVW.
  • DOT and ICC road legal.
  • Electric brakes.
  • 3" lunette eye hitch.
  • Stabilizer jacks.
  • Safety chains and hooks.


5500-K580 Spec Sheet

5500-K580 Drawing

Advanced Digital Monitoring System (ADMS) Spec Sheet

Avtron 2-Year Warranty


  • Manual Cable Reels
  • Electric Cable Reels (choice of 12 VDC or 120 VAC powered)
  • Cable Reel Covers (lockable)
  • Cable Storage Box (lockable)
  • 4/0 Type W Load Cables
  • SIGMA 2 Digital Controls
  • Hydraulic surge brakes
  • 2-5/16" Ball Coupler
  • Mounted Spare Tire
  • Special Paint Color
5500 (K580)
Max Capacity:
500 kW
240 & 480VAC
Three Phase
Minimum Load Step Resolution:
5 kW
Control Power:
Integral Control Power Transformer for control circuit operation
Load Bank Dimensions LxWxH (inches):
61 x 47 x 51
Load Bank Weight:
1100 lbs.
Load Bank w/ Trailer Dimensions LxWxD (inches):
180 x 88 x 83
Load Bank w/ Trailer Weight:
3000 lbs.
Limited Warranty:
2 Year
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