The limiter that limits the voltage and the current has adhered to the power supply where the grade is high for a moment
though nothing a cheap switching power supply. The power supply doesn't

start indefinitely when it makes a mistake in the adjustment. it misunderstands it when broken if it doesn't know.

After it steps up the voltage up to a starting necessary limit voltage of the minimum set of the start of the limiter, the limiter adjusts the voltage limiter especially because it does the break when raising it ..
more than a regulated voltage... as do the breakIt decreases the voltage, it restarts, and it is adjusted to a necessary voltage.

The limiter of the power supply protects it before excessively raising the power-supply voltage if it neatly adjusts it and putting the equipment out of order. The limiter of the current can be used for a short and an abnormal current.

The voltage and the current limiter of the switching power supply are convenient.