The Miller LBP-350 Load Bank (Stock No. 043329) is an essential diagnostic tool for industrial maintenance teams, welding supply repair shops, and facility managers who require precise verification of their welding fleet's performance. Designed and manufactured by Miller Electric, this portable load bank provides a controlled, adjustable electrical load to simulate welding conditions, allowing technicians to troubleshoot, calibrate, and verify the output of welding power sources and generators without the need to strike an arc or consume welding consumables.
With a substantial power capacity of 12.25 kW, the LBP-350 is engineered to handle the rigorous demands of industrial testing. It offers a maximum capacity of 350 amps, with a robust 100% duty cycle rating at 300 amps and 30 volts (AC or DC). This continuous duty capability is critical for performing extended load tests to diagnose thermal shutdown issues or verify long-term output stability. For higher peak testing, the unit can handle 350 amps at 35 volts with a 30% duty cycle. The load is managed through seven individual 50-amp toggle switches, providing technicians with the flexibility to step the load up or down in 50-amp increments to test various ranges of a machine's output curve.
The unit is equipped with integrated analog meters that display both AC and DC voltage and amperage, giving immediate visual feedback on the power source's performance. For scenarios requiring laboratory-grade precision, the LBP-350 includes jacks for external metering connections, allowing third-party calibrated multimeters or oscilloscopes to be attached for detailed analysis. The device requires a standard 110/115/120 VAC input (50/60 Hz) to power its internal cooling fans and control circuitry, ensuring the resistive elements remain within safe operating temperatures during heavy testing. Connection to the welding power source is made via standard 1/2-inch (12.7 mm) terminals, accommodating a wide range of welding cable lugs.
Whether you are commissioning new equipment, performing routine annual calibrations, or diagnosing a faulty power supply, the Miller LBP-350 provides the reliability and accuracy required to maintain a high-performance welding operation.
| Additional Information |
|---|
| Brand:Miller |
| Amperage:350 |
| Packaging Description:1 Per Ea |
| Capacity:12.25 kW |
| Rated Load (100% Duty Cycle):300 A at 30 VAC/DC |
| Rated Load (30% Duty Cycle):350 A at 35 VAC/DC |
| Load Steps:7 x 50 Amp Switches |
| Input Voltage:110/115/120 V |
| Connection Terminals:1/2 in (12.7 mm) |
| Meters:Analog AC/DC |
