Advantages of Porcelain Composite Insulator

Porcelain composite insulators have good anti-fouling ability, which can reduce the number of pieces used to reduce the string length, which can reduce the height of the tower, and its own light weight can improve the ability of the tower and the line to resist ice coating, save a lot of steel and floor space, if developed The use of large-tonnage porcelain (glass) composite insulators is of greater significance in the construction of UHV projects.

Advantages of Composite Insulators

1. Stable and reliable mechanical performance.

The end connection fittings (steel feet, iron caps) of the insulator all adopt the structure of the disc-shaped suspended porcelain insulator, and the core plate is made of high-strength porcelain. Every process from the supporting parts to the finished product is made and inspected in strict accordance with national and industry standards. Thereby, the receiving and transmission of the moment acting on the insulator is reliably ensured. The test results prove that this structural advantage of porcelain insulators has been fully embodied. At present, products with six mechanical strength grades of 100KN, 120KN, 160KN, 210KN, 240KN, and 300KN have passed the type test of the "National Quality Supervision and Inspection Center for Insulator Lightning Arrester".

2. Excellent pollution flashover resistance.

As the silicone rubber composite jacket has good hydrophobicity and hydrophobicity migration, it improves the power frequency wet flashover voltage and the ability to resist pollution flashover. Through the artificial pollution flashover voltage comparison test, the pollution flashover voltage of each porcelain composite insulator is increased by more than 70% compared with the porcelain insulator of the same type and specification. At the same time, the umbrella shape also has better wind and rain self-cleaning ability and pollution speed. Slow, manual water washing and cleaning are also extremely convenient, especially in dusty and dirty environments, it is more and more excellent. The insulator is easy to adjust the creepage distance of the external insulation, which can meet the requirements of the creepage distance of the insulator string for the operation line in the heavy pollution area.

Porcelain Pin Insulators

3. Strong impact resistance

The surface of Porcelain Pin Insulators is firmly covered with a silicone rubber composite jacket, which makes it have good impact resistance. At the same time, since the porcelain parts are not directly exposed to the air, the frequency of breakdown or bursting of the porcelain parts caused by sudden changes in environmental temperature or lightning strikes is reduced, thereby greatly reducing the line maintenance cost. 

4. Light weight, convenient for transportation, installation and maintenance.

The weight of the porcelain composite insulator is 1/3 lighter than the same type of porcelain insulator, thus reducing the installation labor intensity and the load bearing pressure of the iron tower. It can well withstand the bending distance on the tensile string and slow down the damage to the iron tower caused by the periodic impact force.

5. Unique and reasonable structure

The shape structure of the porcelain composite insulator, the iron cap adds a concave groove to the base of the porcelain insulator iron cap, which is convenient for the insulator to be clamped by tools during installation and replacement. The connection size and structural height of the iron cap and the steel foot of the insulator are exactly the same as the original porcelain insulator, which has good interchangeability. Especially on the current running line, the composite insulator can be replaced directly without adjusting the sagging of the original line, and the replacement is extremely convenient.