Power Gap Lightning Protection Device

LZA-30A, LZA-50A
Application range
LZA-30A/50A are applied to equipotential bonding of the low voltage side of transformer or main low voltage distribution boxes inside the building, providing protection against the overvoltage arising fromthe lightning strike to power supply system of class I or faulty operation, but they are not applied to the systemof the expected short-circuit current beyond rated breaking afterflow current. The series fuse must be at the front-end of the product, otherwise, the surge protector may be burned out by the developed power flowcurrent, while the product is discharging. (option from standard IEC61643-1 and GB50343)
Main structure and work principle.
The two electrodes are connected to the line L (or line N) and line PE respectively. An electric gap is formed between the two electrodes. The high-impedance state exists between the two electrodes when the electric network runs under the striking voltage. If the voltage between the two electrodes surpasses the striking voltage arising fromthe lightning or faulty operation on the electric network, arc through the electric gap and power energy releases through arc discharge. The arc will be extinguished by the arc quenching system consisting of detached arc slices and arc quenching roomand the electric gap resumes to high-impedance state. The discharge gap is totally-enclosed and No arc escape.