How much do you know about polymeric housed surge arrester?

The resistance of the polymeric housed surge arrester is a metal oxide semiconductor non-linear resistance with zinc oxide as the main component. When the voltage applied across the resistor is less than the varistor voltage, the varistor assumes a high resistance state. If the resistance is connected in parallel to the circuit, the valve slice is open. When the voltage applied to both ends of the varistor is greater than the varistor voltage, the varistor will break down, showing a low resistance value, or even close to a short-circuit state. The breakdown state of the varistor can be restored. When the voltage higher than the varistor voltage is removed, it returns to the high resistance state. When the power line is struck by lightning, the high voltage of the lightning wave causes the varistor to break down, and the lightning current flows into the ground through the varistor, so that the voltage-like voltage on the power line is clamped within a safe range.

Here is the list of the article:

• What is the sealing problem of polymeric housed surge arrester?

• How to install and maintain polymeric housed surge arrester?

• How many kinds of polymeric housed surge arrester are there in our company?

What is the sealing problem of polymeric housed surge arrester?

The sealing aging problem of metal oxide arrester is mainly caused by imperfect sealing technology adopted by the manufacturer, or unstable aging resistance of the sealing material used. When the temperature difference changes greatly or the running time is close to the end of the product life, it will be used after poor sealing. Moisture immersed, causing the internal insulation level to drop, accelerating the deterioration of the resistors and causing an explosion. Polymeric housed surge arrester can effectively solve the sealing problem due to its excellent physical properties, thereby avoiding the deterioration of the resistor.

How to install and maintain polymeric housed surge arrester?

The installation and maintenance of polymeric housed surge arrester are similar to valve type surge arresters, but the following matters should be noted. ①Polymeric housed surge arrester is not suitable for installation in places with vibration or severe pollution and places with severe corrosive gas. ②Preventive tests should be done before the polymeric housed surge arrester is put into operation and after every two years of operation. ③The golden polymeric housed surge arrester is sealed with a brass double bottom cover, and a preventive test should be carried out every 5 years after it is put into operation. When measuring the leakage current, a 10kV DC voltage should be applied on both sides of the polymeric housed surge arrester (the AC pulsation is not more than ±1.5%), and the leakage current is required to comply with the specified value of the product.

How many kinds of polymeric housed surge arrester are there in our company?

There are three kinds of polymeric housed surge arresters in our company, they are 12KV polymeric housed metal-oxide lightning surge arrester without gaps, polymeric housed metal oxide lightning surge arrester series without gaps and polymeric housed mental oxide lightning surge arrester series without gaps. If want to purchase polymeric housed surge arrester, please contact our company, we will try our best to meet all your needs.