043329 - Miller LBP-350 Portable Load Bank 350A for Welder Calibration

Precise Troubleshooting for Welding Power Sources

Take the guesswork out of welder repair and calibration with the Miller LBP-350 Load Bank. As a professional welder or service technician, you know that relying on a manual arc to test a machine is inconsistent and wasteful. The LBP-350 provides a static, repeatable resistive load that mimics the electrical characteristics of a welding arc, allowing you to accurately diagnose power source issues, calibrate digital meters, and verify that a machine is delivering its rated output. This tool is indispensable for anyone serious about welding equipment maintenance and repair.

The LBP-350 is built for versatility, supporting both AC and DC welding outputs. This makes it compatible with a vast array of equipment, from TIG inverters and MIG power sources to engine-driven welder-generators. The front panel features seven heavy-duty toggle switches, each engaging a 50-amp load step. This simple yet effective design allows you to dial in the exact amperage draw you need, up to a maximum of 350 amps. Need to check if a machine can hold 150 amps steady? Simply flip three switches. Need to stress-test a generator at max output? Engage all seven. The unit is rated for a 100% duty cycle at 300 amps, meaning you can run continuous tests without worrying about overheating the load bank itself.

Monitoring the test is straightforward thanks to the large, easy-to-read analog meters on the face of the unit. These meters provide instant readings for voltage and amperage. However, Miller understands that calibration often requires certification-level accuracy, which is why the LBP-350 also features external metering jacks. These allow you to hook up your own certified Fluke or other high-precision meters to verify the machine's output against factory specifications. The unit is portable and rugged, designed to be carried to the machine rather than requiring the machine to be brought to a bench. It comes complete with a 13-foot (4 meter) 115-volt power cord to run the cooling fans, ensuring the resistive coils dissipate heat efficiently. Invest in the LBP-350 to ensure your welding fleet is always running at peak performance.