pin type insulator used up to 1

Electrical Insulators use in Power System: Types & Application

Let us now discuss the types of power line insulators based on their construction and design. However, glass insulators have a shorter lifespan than porcelain insulators. Pin insulators are used for voltages up to 33kV, while suspension insulators using multiple discs are required for higher voltages. It consists of an assembly of suspension insulators in which the discs are used in the verticalplane.

In the case of high voltage lines that have longer spans and greater mechanical loading, suspension insulator strings are arranged in a horizontal position, and these are referred to as strain insulators. In transmission and distribution (T&D) systems, overhead conductors are usually supported by towers and poles, which are both grounded. The suspension insulators are most beneficial than the other insulator. Especially, glass types of insulators used in lightweight conditions.

The conductor sits in the groove of this insulator and it is clamped with the assistance of a soft binding wire. The conductor sits in the groove of this insulator and it is clamped with the assistance of an annealed wire of the same material as the conductor. Pin type insulator is fixed to the cross-arm on the pole and the conductor is housedin a groove at the upper end of the insulator. Pin type insulators are used for transmission and distribution of electric power at voltagesup to 33 kV.

thought on “Different Type of Insulators Used in Power System”

• It is connected with a stay wire to fasten and counterweight the dead-end pole.
• Insulators are classified based on their construction, voltage rating, and application in the electrical system.
• It functions similarly to a suspension insulator, supporting radio antennae and overhead power cables.
• Pin insulators are also able to withstand factors such as wind, rain, ice and UV radiation.
• The conductor clamps onto the top groove of the insulator and secured with binding wire.

In recent years, polymer-based insulators have gained traction for their lightweight construction and resistance to breakage. At this point, post insulators or suspension insulators may offer a more economical solution, especially when the full lifecycle cost is considered. Compared to other types of insulators—such as post or suspension insulators—pin insulators often require fewer components and simpler installation procedures. This limitation is why post insulators or suspension insulators often replace pin insulators when dealing with high voltage transmission lines. This type of insulator has more mechanical strength than other types of insulators.

Construction and Materials

Shackle insulators are strain insulators for low-voltage lines, less than 11 kV. Multiple suspension strings can be placed parallel to withstand higher tensions. In this condition, the strain insulators are used to sustain the mechanical tensile load of the conductors.