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Simplex LBD Radiator Cooled Load Bank (50-1200 kW)

  • Bolt-Together
  • Bolt-Together
  • Weld-Together
  • Weld-Together
Call with Options for Price Quote: 1-888-331-5344
0.00 LBS

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The Simplex LBD-Series load banks utilize the radiator air outflow of a generator engine to cool the resistive load elements. The LBD can be adapted to fit varying site conditions and duct dimensions, making it ideal for after market retrofit. Many options are available to suit individual requirements and simplify installation.


  • Two Standard Forms: Bolt-together (50-400 kW) and Weld-together (400-1200 kW).
  • Numerous Applications: Reliability exercise and testing of standby generator sets; Base load leveling to eliminate the deleterious effects of low load operation; Automatic protection against generator reverse power and motoring of prime mover by power regenerated by inertial loads.
  • System Controls: Local or remote controls; Control compartments thermally insulated from load elements; Indicator lights: Normal Operation and Cooling Failure.
  • Cooling: Utilizes the air outflow of an engine radiator.
  • Malfunction Protections: Cooling failure sensors lock out load application.
  • Load 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.
  • Load Control: Branch circuit contactors each step or each 50KW circuit maximum; Contactors with enclosed silver surfaced contacts, 120V coils, electrically operated and electrically held.
  • Connections: Control Wiring: 105°C color coded; Power Wiring: 150°C XLP color-coded; Cables connect to full rated copper bus bar with an oversized terminal junction box.
  • Duty Cycle: Continuous.
  • Enclosure: Includes service access panels.
  • National Fire Protection Association (NFPA): Satisfies the requirements for emergency stand-by power systems.

Bolt-Together Features (50-400 kW)

  • Enclosure: galvanized steel construction.
  • UL Recognized Simplex Powr-Rod load elements.
  • Earned the UL Listing Mark.

Weld-Together Features (400-1200 kW)

  • Enclosure: Finish painted with a UL Listed process consisting of either a powder-coated finish or a liquid-coated finish consisting of an epoxy primer and a polyurethane finish.
  • UL Recognized Simplex Powr-Web load elements.


LBD Brochure

LBD Operator's Manual


  • Automation with Auto-Load Regulation and Regenerative Power Protection
  • Remote Control
  • Multi-function metering package
  • Data Logging
  • Outdoor enclosure configuration
  • Mounting angles
  • Mounting feet
  • Anti-condensation heaters at 120V 1Ph, 240V 1Ph, or any common 3Ph voltage
Max Capacity Options:
50-400 kW (Bolt-Together), 400-1200 kW (Weld-Together)
Frequency Options:
50, 60, 400 Hz
Voltage Options:
All common 3-Phase 50 and 60 Hz voltages: 60 Hertz: 208V, 220V, 240V, 416V, 440V, 450V, 460V, 480V, 575V, 600V; 50 Hertz: 190V, 200V, 208V, 380V, 400V, 416V
Load Steps:
50 kW resolution
Control Power:
Internal from load bus; Load control circuits operate 120V via transformer; Control circuits are fused.
Varies per application
Varies per application
Limited Warranty:
12 Months

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