Glass insulator knowledge: Why choose glass insulator?

What are the uses of glass insulators?

Glass insulators are used for insulation and suspension of conductors in high-voltage, ultra-high voltage, and ultra-high voltage AC/DC transmission lines.

What is the composition of glass insulators?
Glass insulators are composed of steel caps, tempered glass components, and bonded together with cement adhesive.
All glass insulator products adopt the most advanced cylindrical head structure internationally, which is characterized by small head size, light weight, high strength, and large creepage distance, which can save metal materials and reduce line costs. To meet the needs of live working, traditional Chinese structural shapes are used on the brim of the hat.

What are the mechanical (electrical) strength grades of glass insulators?

Glass insulators have 70kN, 100kN, 120kN, 160kN, 210kN, 240kN, 300kN, 420kN, and 550kN.

What are the types of glass insulators?

Glass insulators are divided into standard glass insulators, Anti-pollution resistant glass insulators,aerodynamic glass insulators, double umbrella glass insulators, triple umbrella glass insulators, and ground wire glass insulators.

Standard glass insulator	Anti-pollution glass insulator	Aerodynamic glass insulator	Double umbrella glass insulator	Triple umbrella glass insulator	ground wire glass insulator

What are the models of glass insulators?

“L” stands for long spindle, “S” stand for short spindle, “P” stand for pollution, “D” stand for double, “T” stand for Triple

Why choose glass insulator?

The advantages of glass insulators as following:

Zero value self breakage, easy to detect: tempered glass insulators have the characteristic of zero value self breakage, which can be observed on the ground or in a helicopter without the need to climb the pole and inspect each piece, reducing the labor intensity of workers. The annual operating self rupture rate is 0.02-0.04%, which can save maintenance costs of the line.

The new surface of the glass insulator subjected to lightning burns during operation is still a smooth glass body with a tempered stress protection layer, which maintains sufficient insulation performance and mechanical strength due to its excellent resistance to arc and vibration. There have been multiple incidents of conductor icing induced vibration on 500kV transmission lines. After testing, the mechanical and electrical performance of the glass insulators affected by conductor vibration did not deteriorate.

Good self-cleaning performance and resistance to aging. According to the general feedback from the power sector, glass insulators are not prone to fouling and are easy to clean. Glass insulators used in southern China's power lines are washed relatively clean after rain. Regular sampling and testing of the mechanical and electrical performance of glass insulators on typical regional power lines after operation have been conducted. Accumulated data from thousands of years shows that the mechanical and electrical performance of glass insulators after 40 years of operation is basically the same as that at the time of delivery, and there is no aging phenomenon.

What are the tests for glass insulators?

The testing of insulators is divided into individual testing, sampling testing, and type testing.

Test one by one

1) Appearance inspection. According to IEC60383.

2) Tensile load test. According to IEC60383.

Sampling test

 Sampling tests are divided into factory sampling tests (completed by the factory itself), third-party sampling acceptance tests, and on-site sampling tests.

 Sampling quantity of glass insulators

Type test

Type testing includes type testing, sampling testing, and individual testing.

1. 1.Size, dimension, deviation, creepage distance, and gauge inspection

2 Locking pin operation test

3 Lightning impulse dry withstand voltage test

4. 4. Wet power frequency withstand voltage test

5 Thermal Performance Test

6 Mechanical damage load test (only for glass insulators)

7. 7.Residual mechanical strength test
8. 8.Coating thickness test

 
What are the signs of glass insulators?

Each insulator should be labeled with the manufacturer's name or trademark and the year of manufacture on the insulation or metal accessories in accordance with IEC60383, and its mechanical and electrical failure load or specified mechanical failure load value should also be indicated at a suitable position on the insulator. These signs should be clear and firm.

What is the advantage of glass insulator from Jiangxi huayao electric co.,ltd.

1. Factory direct price

We are a glass insulator direct factory, we are not an assembly factory.

We can control the price from raw material to finished price, each step we use superior quality, but we control the cost for each step so that customer can win the market. We can reach win-win profit.

2. Large production capacity, short delivery time.

Huayao has the ability to produce over 6 million pieces of AC and DC glass insulators annually. We can meet customer short delivery time request. We prepare some stock for common type glass insulator.

3. Strict Quality Control

Huayao control the quality starting from the careful screening of raw materials and automatic batching, every link follows a strict technological process, from melting to pressing, from uniform tempering to cold and hot impact, homogenization treatment, to subsequent gluing, maintenance, inspection and packaging, until the final product leaves the factory.

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