The output short circuit will short-circuit the output positive and negative together to see if the power supply has a bad condition. The commonly used test method is to investigate the short-circuit input power, and look at the input power of the AC output when the output is short-circuited. Less than a certain value.

The output over current protection is to automatically turn off the output when the output current increases to a certain level to achieve the protection function. A very common kind of protection at this time. The test method generally involves slowly increasing the output current and turning off the output when the load is seen.

The absolute value of the ripple (including noise) of the output voltage at rated output voltage and load current, usually expressed as a peak or rms value.

Full load 50% output voltage.

Input power refers to the power absorbed by the device. For electrical equipment, the input power is equal to the product of the input voltage to the input current. Input power has different interpretations for different devices. For example, the input power of the speaker refers to the power of the unit inside the speaker that is subjected to the power of the speaker.

The rated current refers to the current when the electrical equipment is operated at the rated voltage and at the rated power.

It means that the motor is in the best working condition under this data. The rated voltage is fixed with a tolerance of 10%.

Refers to the power consumed by the resistance furnace at the rated temperature without the workpiece being operated.

When the secondary of the transformer is open, there is still a certain current in the primary. This part of the current is called no-load current.

The output is not connected to the load.