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Simplex LBW Water Cooled Load Bank (50-2500 kW)

  • LBW 500kW Front
  • LBW 500kW Front Open
  • LBW 500kW Back Open
  • LBW 500kW Right Side & Back
  • LBW 2250KW Front & Left Side
  • LBW 2250KW Front Open
  • LBW 2250KW Back Open
  • LBW 2500kW Front
  • LBW 2500kW Back Open
Call with Options for Price Quote: 1-888-331-5344
1,000.00 LBS

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The Simplex LBW Water-Cooled Resistive Load Bank is completely quiet, highly compact, and virtually maintenance free - offering a highly attractive alternative to traditional air-cooled units. Ideal for installation in buildings in central-city areas, industrial parks or office complexes where an outdoor air-cooled unit would be architecturally obtrusive or impossible to install due to space or noise restrictions.


  • Load Capacity Options: Max capacity of 50-2500kW.
  • AC Voltage Options: 50, 60, 400 Hz voltages up to 600V.
  • DC Voltage Options: Up to 250 VDC.
  • Typical Load Step Resolution: 50kW minimum.
  • Duty Cycle: Rated for continuous operation.
  • Controller: The Simplex D-Series Digital Controller is PLC-based, network capable, and comes with a local or remote color TFT touch-screen operator interface.
  • Control Power:  Internal from load bus via transformer.
  • Coolant Options: City water (nominal 50PSI), closed loop chilled water systems, heat exchanger systems, or pumped water from natural sources (lake, river, etc.). Also can be used wth brine or sea water if ordered with optional nickel alloy construction and elements.
  • Coolant Pressure: Load cells are rated for operating pressures up to 180PSI. High pressure systems are available.
  • Coolant Flow Control: Main electrically operated valve.
  • Coolant Connections: 2”, 4” or 6” as required by flow.
  • Load Elements: Water-immersion type, screw-plug mounting.
  • Load Element Circuit Protection: Branch circuit fuses. One set of fuses each 50KW branch. Fuses are current limiting type, 200,000 AIC, 600V, enabling safe use on large generating or UPS system.
  • System Protections: Sensed at each load cell: overpressure, overtemperature, low coolant level, loss-of-flow. Lockout and alarm at control panel.
  • Load Connection: Main copper load bus.
  • Enclosure: Compact space-efficient design.
  • Network Capable: Multiple LBW load banks can be paralleled to achieve virtually any total capacity desired.
  • National Fire Protection Association (NFPA): Satisfies the requirements for emergency stand-by power systems.


LBW Brochure

LBW 400kW Drawing

LBW 600kW Drawing

LBW 2250kW Drawing

LBW Operator's Manual


  • Automation with Auto-Load Regulation and Regenerative Power Protection
  • Additional Remote Controls
  • Control Power from external 120V source
  • Multi-function metering package
  • Data Logging.
  • Load step resolution down to 1, 5, 10, or 25kW.
  • High pressure system up to 1500 PSI
  • Nickel alloy construction elements for brine or sea water coolant
  • Cam-connectors for load connections
Max Capacity Options:
50 kW-2500 kW (Multiple modules can be used for higher capacities)
Frequency Options:
50, 60, 400 Hz
AC Voltage Options:
To 600V AC
DC Voltage Options:
To 250V DC
Load Steps:
50 kW resolution typical
Control Power:
120V internal, transformer isolated
City water, Closed loop heat exchanger, natural water
Cooling Characteristics: Normal Duty:
10 GPM per 100KW, 62.5°F rise
Cooling Characteristics: Minimum:
6.25 GPM per 100KW, 100°F rise, outlet not to exceed 170°F
Cooling Characteristics: Special Duty:
50 GPM per 100KW, 12.5°F rise (Chilled water systems)
Coolant Requirements:
KW=GPM x Temp. Rise (F) x .16; GPM = KW / (Temp. Rise x .16); Temp. rise (F) = KW / (GPM x .16); Particles must be less than 150 microns or a filter is required.
Pressure Drop:
5 PSI or less
Up to 180 PSI
Water Connection:
2”, 4” or 6”, as required by flow
Duty Cycle:
Enclosure :
Limited Warranty:
12 Months

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