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Simplex dynaMITE Portable Load Bank (300-400kW)

Dynamite 300: $24,277.00
Dynamite 400: $26,995.00
Please Call for a Detailed Quotation

SKU: dynaMITE Category Brand:
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The Simplex dynaMITE Portable Resistive Load Bank is designed to provide manufacturers, distributors, and users of large AC generators and UPS systems with sophisticated testing capability up to 400kW.


  • Load Capacity: Max capacity up to 300 or 400kW at 240 and 480 VAC, 3PH, 60Hz. Capacity derates at other voltages.
  • Duty Cycle: Rated for continuous operation.
  • Digital Load Step Control: Nominal 5kW resolution – direct enter any load value, and controller will apply load within nominal 5kW resolution.
  • Digital Control: PLC based control with 8-inch color TFT touch-screen interface. MODBUS over TCP/IP network communication. Touchscreen easily removable from panel.
  • Instrumentation: Digital power transducer with built-in communication to digital controller. Data display on touch-screen. Data acquisition and recording.
  • Control Power Supply: Dual voltage control power transformer with supply power switchable to internal (generator) or external.
  • Cooling System: Forced Air
  • Load Elements: Simplex Powr-Web chromium alloy, open wire, continuously supported, power resistor.
  • Load Element Circuit Protection: Branch circuit fuses. One set of fuses each 50KW branch. Fuses are current limiting type, 200KAIC, 600V, enabling safe use on large generating or UPS system.
  • Malfunction Detection System: Protection against fan failure, high exhaust air temperature, high intake air temperature, over-voltage and fan reversal. Exhaust air temperature displays on screen.
  • Load Connections: Cam-type power connectors (2 per phase & 1 ground for Dynamite 300; 3 per phase & 1 ground for Dynamite 400).
  • Enclosure: Indoor enclosure with casters, lifting eyes, and forklift channels.
  • Network Capable: Any number of dynaMITE and Electra Load Banks can be combined for large system capacities and networked for central control and data acquisition.
  • UL Listed.
dynaMITE Comparison Chart
Model Max Capacity Full Load Amps Cooling System Max Air
Temp Rise
300 KW at 240/480V 3Ph
225 KW at 208/416V 3Ph
188 KW at 380V 3Ph
200 KW at 240V 1Ph
721A at 240V
361A at 480V
8,500 CFM
1.5HP Motor
290 F
400 KW at 240/480V 3Ph
300 KW at 208/416V 3Ph
251 KW at 380V 3Ph
267 KW at 240V 1Ph
961A at 240V
481A at 480V
10,500 CFM
3HP Motor
300 F


dynaMITE Brochure

dynaMITE Drawing

dynaMITE Drawing with Optional Weather-Resistant Enclosure

Simplex One-Year Parts Only Warranty


  • 400 Hz modification – Call for Pricing
  • Network control cables – Call for Pricing
  • Remote control cable extensions – Call for Pricing
  • Simplex AUTO-TEST software for full automation of testing with data acquisition and report generation – Call for Pricing
  • 12’ connection cable set including 3-phase power cables, ground cable, stored in rear compartment – Call for Pricing
  • Weather Resistant Enclosure (OPLB-84) – ADD $2,418.00
  • Highway Trailer (OPLB-85) – ADD $15,900.00
  • Steadypower 20ft or 50ft Cable Set (see below to order)
Load Voltage Rating


Full Load Amps

Digital Load Step Control

Control/Fan Power

Internal Control/Fan Power

External Control/Fan Power

Cooling System

Max Air Temp Rise

Ambient Air Temp

Power Connection

Dimensions HxWxD (inches)

300 Weight

400 Weight

Limited Warranty


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