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Pillar Insulator vs Composite Insulator

May. 28, 2021

What is the difference between a pillar insulator and a composite insulator?

Post insulators and composite insulators are classified from two different perspectives. Pillar insulators are classified according to the use of insulators, while composite insulators are classified according to the material of insulators. It can be said that post insulators include post composite insulators, post porcelain insulators, etc.; composite insulators include post composite insulators, hollow composite insulators, and line composite insulators. Next, the composite insulators supplier will share them with you.


History of post insulators

Post insulator is a special kind of insulation control that can play an important role in overhead transmission lines. In the early days, post insulators were mainly used for electric poles. Slowly, many hanging insulators were suspended at one end of the towers connected to high voltage power lines. It is used to increase the creepage distance and is usually made of silicone or ceramic and is called an insulator. 

Insulators play two basic roles in overhead transmission lines, namely supporting the wires and preventing current flow back to the ground. These two roles must be ensured. The insulator should not fail due to various electromechanical stresses caused by changes in environmental and electrical load conditions. Otherwise, the insulator will not have a significant impact and will damage the life and service life of the entire line.


Post Composite Insulator 

Post Composite Insulator

Introduction of lightning protection pillar insulator

The lightning protection pillar insulator is a new combined structure of the arc-proof insulator, which is mainly composed of an insulating shield, a compression nut, a pressure block seat, a movable pressure block, an upper metal cap, a composite insulator, an arc striking rod, an insulating sleeve and The lower metal foot is composed of the arc-striking rod and the upper metal cap. When a lightning strike occurs, the discharge between the arc-striking rod and the lower metal foot causes the freewheeling power frequency arc to move to the arc-striking rod to burn, thereby protecting The insulated wires are not damaged.


Indoor and outdoor pillar insulators and their manufacturing methods

An extremely good lightning arrester insulator with a discharge gap and a zinc oxide arrester element made in the insulator. It includes a discharge electrode in the insulator. The discharge gap consists of heat-resistant protrusions in and around the discharge electrode in the insulator. A pair of metal or conductive ceramic plates clamps the protrusions from both sides and is electrically connected to the discharge electrode. The pair of plates are connected by the inorganic glass through opposing protrusions and hermetically sealed.


The zinc oxide arrester elements have a highly reliable gas-tight fixed and sealed structure, thus truly eliminating accidental faults in the power supply or distribution lines at normal operating voltage and significantly reducing damage caused by moisture and lightning.

Indoor and outdoor pillar insulators technical conditions.

1. Porcelain pillar structure, waterproof transmission box, a new type of vacuum interrupter chamber.

2. 2-3 current transformers, four coils per phase, to be selected and replaced according to user needs.

3. It can be equipped with a CD10 electromagnetic mechanism or CT19 spring mechanism.

4. Good fracture performance, high reliability, long life, and low maintenance workload.

5. Oil-free, non-gasification, economic and environmental protection.

If you want to know about the wholesale composite insulator, welcome to contact us.

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