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ASCO Avtron 4900 Stationary Load Bank (1000-2500kW)

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Call with Options for Price Quote: 1-888-331-5344
3,600.00 LBS

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The ASCO Avtron 4900 (K975A) Permanent Load Bank is designed for outdoor installation and offers a max capacity up to 2500 kW.


  • Load Capacity: Max capacity of 1000, 1500, 2000, 2250, or 2500kW.
  • Standard Voltage: 3PH 480V.
  • Duty Cycle: Rated for continuous operation.
  • Load Step Resolution: Choice of 5kW or 50kW minimum.
  • Controller: Remote manual toggle switch controller w/ NEMA 4 wall-mount enclosure. 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 and Spec Sheet below for other options.
  • Control Power: An Integral Control Power Transformer is provided for control circuit operation. Also see Options below.
  • Cooling Power: Blower motor is factory-wired to the main load bus. Also see Options below.
  • Cooling: Approximately 46,000 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 Connection: Copper bus bars with NEMA pattern are provided for customer load connections.
  • Enclosure: Heavy-gauge aluminized steel outdoor enclosure with high quality baked polyester powder coated finish. Designed for continuous outdoor weatherproof operation on a concrete pad or structural base. Forklift channels are provided in the base for lifting.
  • UL Listed.


4900-K975A Spec Sheet

4900-K975A Drawing

Avtron 2-Year Warranty


  • Local Controller (instead of remote)
  • Control Power from External 120V 1PH 60Hz Source (instead of a Control Power Transformer)
  • Blower Power from External Power Source (instead of factory-wired to main load bus)
  • ADMS Digital Metering - (V, A, KW, Hz) with Data Logging Capability
  • Automatic Load Control
  • SIGMA 2 Digital Controls
  • Further Control Options (see Spec Sheet)
  • Arctic Rating for low temperature applications
  • Other Capacity/Volatge/Frequency Options available
4900 (K975A)
Max Capacity:
1000, 1500, 2000, 2250, or 2500 kW
Phase / Frequency:
Three Phase / 60 Hz
Minimum Load Step Resolution:
5kW or 50kW
Control Power:
Integral Control Power Transformer for control circuit operation
Dimensions LxWxH (inches):
90 x 75 x 93
Weight :
3600 lbs.
Limited Warranty:
2 Year

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