What is the function of lightning conductor and lightning rod? What is the function of lightning arrester?
First of all, the wire arrester with copper alloy wire, so the performance is limited, the reaction rate is only 200 (uS). The delicate and LEMP half peak velocity (maximum energy) is 20 (uS), subtle LEMP is faster than lightning arrester, the arrester so a lightning strike into the ground, for two times, three times tend to react, direct leakage on the device. That is to say, two times, three of the arrester buildings have little effect.Secondly, the introduction of LEMP, will return from the formation of induction lightning. Lightning will leak from all metal containing lead to equipment (cable, power line and signal line, transmission line, etc.). The arrester is one-way function, so it has no effect on lightning, lightning can play bad equipment directly. Moreover, the wire part often do not install arresters.Again, only 20% of the surge from the lightning and other external environment, 80% of the internal system operation, lightning arrester on the 80% is not any role
Also called lightning protector is a device to provide security protection for electric power equipment, instrumentation and communication lines. When the electric circuit or communication lines because of outside interference peak current or voltage suddenly, the surge protector can in a very short time conducting shunt, so as to avoid damage to other equipment surge in the loop.
Is the shock from lightning arrester protection equipment of substation equipment. When the wave of lightning incoming wave over the substation along the line arrester protection level, and the first discharge arrester, lightning current through the introduction of good conductor security of the earth, by grounding lightning protection equipment is voltage amplitude limit in the lightning impulse level below so, electrical equipment is protected.
