Working Principle and Advantages of Zinc Oxide Lightning Arrester

In the security protection camp of the power system, zinc oxide lightning arresters play a crucial role. Their unique working principle and significant advantages ensure the stable operation of electrical equipment.

The working principle of zinc oxide lightning arrester is based on the nonlinear volt ampere characteristics of zinc oxide valve plates. Under normal power frequency voltage, the zinc oxide valve plate exhibits a high resistance state, with only a very small current passing through, like a loyal guardian quietly holding on, with little impact on the operation of the system. When encountering overvoltage such as lightning, the voltage at both ends of the valve increases, and its resistance rapidly decreases, instantly releasing the overvoltage energy through the valve to the ground, like opening a flood discharge door, timely guiding the surging current and protecting electrical equipment from overvoltage impact. Once the overvoltage disappears, the valve returns to a high resistance state, ensuring the normal operation of the system. This characteristic of automatically adjusting the resistance with voltage changes enables it to accurately respond to complex and changing voltage environments.

Its advantages and features are even more evident at a glance.

One is excellent protection performance, which can respond to overvoltage in nanoseconds, act quickly, effectively limit overvoltage within the insulation tolerance range of the equipment, and greatly reduce the risk of equipment damage.

The second is the gapless design, which avoids the protection uncertainty caused by the dispersion of gap discharge in traditional lightning arresters and improves the reliability and stability of protection.

Thirdly, it is small in size, light in weight, easy to install and maintain, and can be easily placed in limited space distribution places.

Fourthly, it has a long service life, slow aging of zinc oxide valve plates, and can operate stably for a long time, reducing replacement frequency and lowering operation and maintenance costs.

Zinc oxide lightning arrester, with its advanced working principle and outstanding advantages, leads the way in the field of power protection, building a solid barrier for power grid safety and continuously safeguarding our electrical life.

HZ-20A Wireless Zinc Oxide Surge Arrester Tester for Transformer