How does the application of lightning arrester wound core in high-voltage electrical equipment prevent equipment from being damaged by overvoltage?
Publish Time: 2025-03-10
During the operation of high-voltage electrical equipment, overvoltage is a safety hazard that cannot be ignored. Overvoltage may not only cause equipment damage, but also cause power system failures, affecting power supply stability and safety. Therefore, it is crucial to take effective protective measures. As an important overvoltage protection device, lightning arrester wound core plays a key role in high-voltage electrical equipment.
The lightning arrester wound core is an overvoltage protection device made of metal oxides or other nonlinear resistance materials. Its core lies in the design of the rolled iron core structure, which enables the arrester to respond quickly under high voltage and limit the overvoltage to a safe range. When the voltage in the power system exceeds the normal range, the lightning arrester wound core will quickly conduct and guide the overvoltage to the ground, thereby protecting the electrical equipment from damage.
The application advantages of lightning arrester wound core are mainly reflected in the following aspects: First, it has a fast response speed and can limit the overvoltage in a very short time; second, it has good protection performance and can effectively reduce the impact of overvoltage on the equipment; third, it has a long service life and has high reliability and stability. These advantages have made the lightning arrester wound core widely used in high-voltage electrical equipment.
In terms of preventing equipment from being damaged by overvoltage, the lightning arrester wound core has adopted a variety of strategies. First, through precise calculation and design, the rated voltage and nominal discharge current of the lightning arrester wound core are ensured to match the actual needs of the high-voltage electrical equipment. In this way, when an overvoltage occurs, the arrester can act quickly to limit the overvoltage to the range that the equipment can withstand.
Secondly, the residual voltage characteristics of the lightning arrester wound core are also an important factor in preventing equipment from being damaged by overvoltage. Residual voltage refers to the peak voltage across the arrester when the nominal discharge current passes through it. Lower residual voltage means that the arrester can better protect the equipment from the impact of overvoltage. Therefore, when selecting an arrester, products with lower residual voltage should be given priority.
In addition, the grounding of the lightning arrester wound core is also a key link in preventing equipment from being damaged by overvoltage. Good grounding can ensure that the arrester can quickly guide the overvoltage to the ground when it is in action, thereby avoiding damage to the equipment. Therefore, when installing the arrester, ensure that its connection with the grounding system is reliable and the grounding resistance meets the specified requirements.
In summary, the application of lightning arrester wound core in high-voltage electrical equipment is of great significance to prevent equipment from overvoltage damage. Through precise design, calculation and installation, it can ensure that the arrester responds quickly when overvoltage occurs, limiting the overvoltage within a safe range, thereby protecting electrical equipment from damage. At the same time, good grounding and choosing the right arrester product are also key factors to improve the protection effect.
