What are the characteristics of glass insulators

The high mechanical strength of the surface layer of glass insulator makes the surface less prone to cracks. The electrical strength of glass generally remains constant throughout its operation, and its aging process is much slower than that of porcelain, thereforeGlass insulators

Scrap is mainly due to self-damage, which occurs within the first year of operation, but defects in porcelain insulators only begin to be discovered after a few years of operation.

With glass insulators, it is possible to eliminate the periodic preventive test of live energized insulators during operation. This is because every damage to the tempered glass causes the destruction of the insulator, which is easily spotted by the operator when patrolling the line. When the insulator is damaged, the glass shards near the steel cap and iron feet are stuck, and the mechanical strength of the remaining part of the insulator is strong enough to prevent the insulator string from breaking.

The self-breaking rate of glass insulator is one of the important indicators to measure product quality, and it is also the quality basis for the current bidding and bidding of power transmission projects.

Glass insulators

Glass insulators have the following characteristics:

1) High mechanical strength, 1 2 times higher than the mechanical strength of porcelain insulators.

2) The performance is stable and not easy to age, and the electrical performance is higher than that of porcelain insulators.

3) The production process is less, the production cycle is short, it is convenient for mechanized and automated production, and the production efficiency is high.

4) Due to the transparency of glass insulators, it is easy to find small cracks and various internal defects or damages during external inspection.

5) If there are various defects in the glass body of the insulator, the glass body will automatically break, which is called "self-breaking".After the insulator is self-broken, the iron cap residual hammer still maintains a certain mechanical strength to hang on the road, and the line is still there.

However, it can continue to run. When the line patrol personnel inspect the line, it is easy to find the self-breaking insulator and replace the new insulator in time. Because glass insulators have this "self-breaking" characteristic, it is **.

During the operation of the road, there is no need to carry out preventive tests on the insulator, which brings great convenience to the operation.

6) Light weight of glass insulators. Due to the manufacturing process and other reasons, the "self-breaking" rate of glass insulators is relatively high, which is the fatal disadvantage of glass insulators.

Glass, ceramics and composite insulators are common insulator materials used in power equipment, and they have different characteristics and scope of application. Here are their pros and cons:

1.Glass insulators

Advantages: good anti-fouling performance, not easy to form corona, arc and other phenomena on the surface.

It has good moisture resistance and can be used in wet environments.

High mechanical grip strength and elastic modulus, can withstand certain mechanical loads.

Lightweight, easy to install and maintain.

The cost is relatively low.

Disadvantages: It is not heat-resistant and cannot be used for a long time in a high-temperature environment.

It is fragile and easy to break when subjected to external forces such as shock or vibration.

Insulation properties degrade over time.

2.Ceramic insulators.

Advantages: High temperature resistance, can be used for a long time in high temperature environment.

It has good anti-shock and anti-vibration performance, and is not easy to break.

The insulation performance is stable and does not deteriorate over time.

It has good corrosion resistance and is suitable for environments where acids, alkalis, salts and other chemicals exist.

Disadvantages: It is not resistant to wear and tear, and it is easy to form small cracks on the contact surface.

The weight is large, and it is difficult to install and maintain.

The cost is relatively high.

3.Composite insulators.

Advantages: Light weight, easy to install and maintain.

It has good anti-shock and anti-vibration performance, and is not easy to break.

The pollution resistance is wide, and the surface is not easy to form corona, arc and other phenomena.

The insulation performance is stable and does not deteriorate over time.

Insulators of different shapes and specifications can be designed as required.

Disadvantages: Relatively high cost.

High temperature resistance and corrosion resistance may not be as bright as ceramic insulators.

It is necessary to select the appropriate insulator material according to the actual use environment and requirements.

The requirements for the performance of the insulator first of all, the insulator in the operation must not only bear the effect of working voltage, but also be affected by overvoltage, not only to withstand the action of mechanical force, but also to contain the influence of temperature changes and surrounding environmental conditions, so the general performance of the insulator must meet the following points:

1. It should have good insulation performance, so that it can withstand the pressure specified in the standard in dry and rainy conditions;

2. Must have sufficient mechanical strength;

3. The insulator can withstand large temperature changes without breaking;

4. The aging speed of the insulator is required to be relatively slow and have a long service life.

5. It is required to have sufficient anti-pollution and anti-chemical gas erosion ability.

Ceramic insulators: They have the advantages of good insulation properties, climate change resistance, heat resistance and flexible assembly, and are widely used in lines of various voltage levels. Disc porcelain insulator is a breakdown type, it is composed of cement to glue the porcelain and metal parts with different physical and chemical properties, and will gradually deteriorate under the action of electric field, mechanical load and natural sunlight, wind, rain, snow, fog, etc., which will gradually deteriorate and pose a threat to the safe operation of the power grid.

In particular, if a flashover occurs in an insulator string containing a deteriorated insulator (due to lightning strikes or dirt flashovers, etc.), the head of the deteriorated insulator may instantly heat up**, causing an accident in which the wire falls to the ground.

Glass insulator: It has good mechanical and electrical properties, and its tensile strength, electrical breakdown resistance, vibration fatigue resistance, arc burn resistance and cold and thermal shock resistance are better than porcelain insulators. And unlike porcelain insulators, glass insulators have a zero-value self-detonation insulation self-elimination ability, so they can be easily detected without the need for insulation testing.

The self-detonation rate is usually higher in the first 3 years, which is the opposite of porcelain insulators. Decades of operation and test data have proved that tempered glass insulators have long-term stable electromechanical spine energy and long service life. In order to achieve a large creepage distance, the anti-fouling glass insulator can only be achieved by adding several deep edges on the lower surface of the umbrella skirt (due to process reasons, it is not possible to increase the creepage distance through double or triple umbrellas like porcelain insulators).

When used in areas with serious dust pollution, due to the poor self-cleaning ability and inconvenient cleaning of the umbrella type with deep edges of the bell, the scale of the lower surface is serious, resulting in a great reduction in the ability to resist pollution and flashover.

Synthetic insulators: It has many advantages such as small weight, high strength, good stain resistance, and low maintenance workload. The surface of the silicone rubber synthetic insulator is hydrophobic, and the contamination layer attached to the surface of the umbrella skirt is also hydrophobic (i.e., the hydrophobic migration of silicone rubber), which greatly improves the stain resistance of the synthetic insulator.

From the perspective of domestic use, in the previous large-area pollution flashover accidents, synthetic insulators have shown excellent anti-pollution flashover ability, and in the case of low external insulation level and heavy pollution silver ridge, synthetic insulators are a better choice object.

Finally, I would like to add that the quality of synthetic insulators is indeed very light, but it is not unsuitable for jumper insulators, the key is to see how your jumper is designed, what if it is a V-string???

Glass is an insulator. The main components of glass are silica and other oxides. The chemical composition of ordinary glass is Na2SiO3, Casio3, SiO2 or Na2O·Cao·6SiO2, etc., and the main component is silicate double salt, which is an amorphous solid with irregular structure.

It is widely used in buildings to insulate wind and light, and belongs to the mixture of scattered destruction. In addition, there are colored glasses that are mixed with oxides or salts of certain metals to show color, and tempered glass that is prepared by physical or chemical methods. Transparent plastics, such as polymethyl methacrylate, are sometimes referred to as plexiglass.

Other facts about glass.

The simple classification of glass is mainly divided into flat glass and deep-processed glass. There are three main types of flat glass: flat glass (divided into two kinds of grooved and non-grooved), flat flat glass and float glass.

Due to the uniform thickness of float glass, the flat and parallel upper and lower surfaces, coupled with the influence of factors such as high labor productivity and conducive to management, float punch glass is becoming the mainstream of glass manufacturing.

Abstract: Glass insulator is a device used to support and insulate the wire, which is one of the key components of the high-voltage transmission line, which directly affects the operation safety of the entire transmission line. The difference between glass insulators and ceramic insulators is reflected in the strength of the machinery and the anti-aging properties.

Nebu glass insulators have both advantages and disadvantages, such as slow aging speed and low maintenance costs. If you want to know the difference between glass insulators and ceramic insulators and what are the advantages and disadvantages of glass insulators, you will understand after reading the article. First, the difference between glass insulators and ceramic insulators is **.

1. Mechanical strength: through the test of mechanical and electrical performance comparison of porcelain insulators and glass insulators with different operating years on the road, it is found that some porcelain insulators have been lower than the standard value of the factory test after 15-20 years of operation, and the failure rate increases with the operation life. The stability and dispersion of glass are better than that of porcelain.

The results of high-frequency vibration fatigue test of porcelain and glass insulators show that the electromechanical strength of glass insulators decreases significantly after high-frequency vibration. The reason: on the one hand, it is because of the domestic porcelain insulator material and manufacturing process and other factors, resulting in a large dispersion of quality.

2. Anti-aging performance: porcelain insulators have nearly 100 years of operating experience, and their anti-aging ability is relatively strong. Within a certain period of time after it is put into operation.

A small number of deteriorated insulators can be replaced by means of detection. However, as it grows in operation, it will deteriorate. The glass is tempered, and the surface forms compressive stress, and if there are emblem cracks on the surface of the glass, the microcracks are compressed and do not propagate.

The electrical strength of glass generally remains constant throughout operation, and its aging process is much slower than that of porcelain.

2. What are the advantages and disadvantages of glass insulators?

1. Advantages: the surface of the glass insulator has high mechanical strength, the surface is not prone to cracks, and the aging speed is slow; The live periodic preventive test of the insulator during operation can be cancelled, and there is no need to carry out "zero value" detection in operation, and the operation and maintenance cost is low.

2. Disadvantages: Due to the transparency of glass, it is easy to find small cracks and various internal defects and damages during appearance inspection.

Glass insulators are usually insulated in the following ways:1Surface Insulation Treatment:

The surface of glass insulator is transparent and smooth, and it is easy to accumulate dust, corrosion or condensation, which reduces its insulation performance. Therefore, in the production process, the ridge is used to enhance the surface insulation properties with special coating or oxidation treatment of the beam orange socks. 2.

Physical isolation: Glass insulators generally use two or more insulators in series to improve their electrical strength by increasing their insulation distance. 3.

Annular design: Glass insulators often adopt a ring-shaped design, which helps to reduce the length of the discharge arc due to leakage, thereby improving the insulation performance. 4.

Joint lip protection: A metal protective cover needs to be installed in the part where the insulator is connected with the electrical appliance to protect it from still having good insulation. In conclusion, the insulating properties of glass insulators are entirely dependent on the quality of their design and manufacture.

Yes. Insulators can be divided into three categories: gaseous (such as oxygen, nitrogen and all gases in the non-ionized state), liquid (such as pure water, oil, lacquer and organic acids, etc.) and solid (such as glass, ceramics, rubber, paper, quartz, etc.). Glass is generally made with a variety of inorganic minerals as the main raw material and a small amount of auxiliary raw materials.

Glass is an amorphous inorganic non-metallic material, the main component is silica and other oxides, which is widely used in buildings and can be used to insulate wind and light.

The types of glass include quartz glass, silicon carbonate glass, soda-lime glass, fluoride hand glass, high-temperature glass, high-pressure resistant glass cracking, anti-ultraviolet glass, explosion-proof glass, etc.

Glass is widely used in architecture, daily use, art, medical, chemical, electronics, instrumentation, nuclear engineering and other fields.

Glass is a widely used material. In our daily lives, it can be seen in many items, such as windows, glasses, and bottles, etc. Many people may think that glass is a conductor, but in fact, it is an insulator.

This is because its molecular structure determines that it does not have the property of conducting electric current. Conductor electrons can move freely in it, whereas insulators do not have this ability.

Since glass is an insulator, it is widely used in applications where there are strict requirements for current transmission. For example, in the electrical industry, an insulator is an important component that is used to isolate different parts of a circuit. Insulators made of glass can effectively isolate the circuit and avoid current leakage, thus ensuring the safe operation of the circuit.

In addition, in the development of modern science and technology, glass is also widely used in solar panels, LED lights and other fields. This is because glass is not only insulating, but also able to withstand extreme environments such as high temperatures and pressures, making it an important part of high-tech products.

In summary, glass is an insulator, which is due to its molecular structure that determines that it does not have the property of conducting electric current. The insulating properties of glass make it widely used in the electrical industry, high-tech products and other fields.