What Are the Precautions for Testing Power Supplies with Load Banks?

First, make basic preparations before testing. It is necessary to confirm that the voltage, current, and power parameters of the load bank match those of the power supply to be tested, so as to avoid equipment burnout due to incompatible parameters. At the same time, check the appearance of the load bank to ensure that the cables are not damaged, the interfaces are not loose, and the grounding device is firmly connected to prevent electric leakage risks. Testers should wear protective equipment such as insulating gloves and goggles, clean up debris at the test site, maintain good ventilation, and keep away from flammable and explosive materials.
 

1000kW Load Bank

 

Second, standardize the equipment connection operation. When connecting the load bank to the power supply, first turn off the main switches of both sides, and connect the wires in the order of "connecting the load first, then the power supply". After the wiring is completed, repeatedly check whether the positive and negative poles are reversed and whether the lines are connected incorrectly. Only after confirming that there is no error, turn on the power switch. It is strictly forbidden to plug or unplug cables when the power supply or load bank is energized to prevent arc burns or short-circuit accidents.

Third, strictly control the testing process. During the test, the principle of "gradual loading and step-by-step testing" should be followed. Start with a low load and slowly increase the load capacity, and monitor the power supply output voltage, current, and load bank temperature changes in real time. Avoid overloading the power supply or overheating the load bank due to excessive one-time loading. If abnormalities such as abnormal noise, smoke, or peculiar smell occur during the test, immediately turn off the power supply, troubleshoot the problem, and then continue.

Finally, do a good job in the post-test finishing work. After the test, first gradually reduce the load to zero, then disconnect the connection between the load bank and the power supply, and organize the cables and equipment. Record the test data in a timely manner, compare it with the standard parameters to judge the power supply performance. If abnormalities are found, mark the problem points and report to professional maintenance personnel. It is strictly forbidden to put the faulty power supply into use.