What Are The Advantages Of Practical Composite Surge Protectors?

Surge protector, also known as surge protector, is an important lightning protection device used inside buildings. It can discharge lightning current to the grounding device at the moment of lightning current intrusion, so as to better protect the line and our personal property. Surge protector is divided into switch type surge protector (with discharge gap inside), voltage limiting type surge protector (with varistor inside) and composite type surge protector according to its internal structure. Among the three, composite type surge protector has better lightning protection effect, because it can achieve no leakage current and continuous current, thus eliminating the fire hazard of surge protector. So what are the advantages of practical composite type surge protective device?

What are the advantages of practical composite type surge protector? Before understanding this problem, we first need to understand the working principle of surge protector. For example, switch type surge protection device is not conductive at ordinary times, which is equivalent to a large resistor, but once the lightning current invades the line, because the lightning current breaks through, the gap will quickly conduct and discharge the lightning current to the grounding device; voltage limiting type surge protector is the lightning current breaking through the varistor, thus playing the role of discharging lightning current.

What are the advantages of practical composite surge protectors? The composite surge protector is equivalent to combining the two. Its interior is a discharge gap and a varistor in series, generally with the varistor in front and the gap in the back. When a lightning strike occurs, the two are turned on at the same time until the lightning current is discharged, and the two work in coordination.

What are the advantages of practical composite surge protectors? In the composite surge protector, the discharge gap is equivalent to the switch of the varistor. If the discharge gap is not turned on, the varistor will not break down, and no leakage current will be generated; but the varistor is equivalent to the switch of the discharge gap. Under normal working conditions, due to the existence of the varistor, it is far from enough to break through the discharge gap, so no continuous current will be generated. In the composite surge protector, the two restrain and protect each other, thus achieving 0 continuous current and 0 leakage current.