Common faults and solutions of DC electronic load
Dc electronic load refers to the equipment that can consume electric energy and has comprehensive protection function, which can be divided into internal protection and external protection. The internal protection refers to the electronic load, with over current, over voltage, over power, over heat, voltage protection function; External protection refers to the function of over current, over power, load voltage and low voltage protection for the device under test.
Considering the special performance of DC electronic load, it occupies a large market in electronic equipment, mainly suitable for a variety of power supplies, batteries, adapters and dc electronic load testing fields. Next xiaobian for you to explain the dc electronic load fault self-test method, as follows:
1. Dc electronic load cannot be started: check whether the cable is connected correctly; Check whether the power switch on the front panel can be turned on. Unplug the power cord and check that the voltage selector is in the correct position and the fuse specifications are correct and intact.
2. Abnormal constant current load: check whether the connection line between the instrument and the device under test is inversely connected; Check whether the input voltage and current value of the load exceed the rated power of the instrument; Check whether the set range of load current is suitable.
3. Abnormal constant voltage input: check whether the connection line between the electronic load and the tested equipment is inversely connected; Check whether the maximum output voltage of the tested equipment is lower than the voltage set by the load.
4. Abnormal constant resistance input: check whether the output of the tested equipment is normal; Check whether the resistance range setting of the instrument is reasonable.
5, constant power input abnormality: check whether there is a cable connection between the electronic load and the tested equipment, resulting in load reverse alarm; Check whether the output of the tested device is normal.
In practical applications, the working mode of electronic load is usually opposite to that of power supply, that is, constant voltage CV source needs to use constant current CC mode electronic load, and constant current CC source needs to use constant voltage CV mode electronic load.
TRIUMPH LOAD EXHIBITING AT DATA CENTER WORLD GERMANY 2023-BOOTH F909
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