Safe low voltage circuit, also for AC power secondary circuit
That is, when a person touches an element in the secondary circuit, the voltage applied to the human body does not exceed the safe voltage when it is connected to the ground, the ground terminal of the device, or touches any two of them at the same time. This kind of circuit is It is specially designed with corresponding protection. It is not determined by the three-core or two-core input.
Normally, we would see the SELV driver request in the label and LEDs applications, what does this means?
when a person touches an element in the secondary circuit, when it touches the ground, the ground terminal of the device, or any two of the elements at the same time, the voltage applied to the human body does not exceed the safe voltage.
This circuit is special designed to add corresponding protection. It is none business with the three or input wires to a power supply.
That is say, our 12v 24v constant voltage led drivers are aluminum house IP67 rated, the input wire is 3 wires, but that is a safe low voltage circuit inside this kinds of UL,CE, ROHS led drivers, this is also called SELV led driver.
