An insulator is an insulating control that used to be used for poles and has now gradually developed into a disk-like insulator hung at one end of a high-voltage wire connection tower, usually made of ceramic or glass. It plays an important role in the overhead transmission line, that is, it supports the wire and prevents the current from returning to the ground. The insulator should ensure that when the environmental and electrical load conditions change, the various electromechanical stresses remain unchanged, otherwise it will not only play a due role, but will damage the service life of the entire line.

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The advantages and disadvantages of glass insulator and porcelain insulator: glass insulator The insulator device is made of glass, called glass insulator; At present, the most widely used in the line is the tempered glass insulator. Ceramic insulator is made of electrical ceramic insulator, ceramic insulator is the earliest insulator, the process is simple, but it does not have the advantages of not easy to accumulate dirt, in fact, the pollution of ceramic insulator is also very serious in the field, the biggest advantage of glass insulator relative to ceramic insulator is that there is no need to carry out zero value detection, zero value glass insulator will self-explosion

Glass insulator: has good mechanical and electrical properties, its tensile strength, electrical breakdown resistance, vibration fatigue resistance, arc burn resistance and thermal shock resistance are better than porcelain insulators. And unlike porcelain insulators, glass insulators have the insulation self-elimination ability of zero self-detonation, so that it is easy to be found without 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 prove that tempered glass insulators have long-term stable electromechanical properties and long service life.

The Advantages and Disadvantages of Various Insulators

Glass Insulators

Advantages:

• High mechanical strength on the surface, less prone to cracking, and slow aging rate.
• No need for “zero-value” detection during operation, resulting in low maintenance costs.

Disadvantages:

• Due to the transparency of glass, fine cracks, internal defects, and damages are easily detected during appearance inspection.

Ceramic Insulators

Advantages:

• Excellent chemical and thermal stability, strong anti-aging capability, and good electrical and mechanical properties.
• Flexible assembly suitable for various configurations.

Disadvantages:

• Zero-value detection requires tower climbing for piece-by-piece inspection, involving significant labor and material costs.

Composite Insulators

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Advantages:

• Lightweight for easy installation; high mechanical strength with low breakage risk.
• Outstanding seismic resistance and superior pollution resistance.
• Fast production cycle and high quality stability.

Disadvantages:

• Anti-aging performance is inferior to ceramic and glass insulators.

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