1 Before using the power supply: first confirm whether the input and output voltage specifications match the nominal value of the power supply used;

2 Before power-on: Check if the input and output leads are connected correctly to avoid damage to the user equipment;

3 comprehensive inspection: check whether the installation is firm, the installation screws and the power board device have no contact, measure the insulation resistance of the outer casing
and input and output, so as to avoid electric shock

4 pay attention to maintenance: frequent power switch, working environment and load level will affect its life.