Shackle type is used for applications upto 11 kv where a sharp turn in line direction is required. It is supported with a steel bolt or pin which is fixed on the cross arm. The conductor is tied to the neck of the top concave surface (above the upper shed) using binding wires to secure the conductor.
Types of Electrical Insulator Overhead Insulator
It consists the number of porcelain insulator units connected with each other by metal links to form a flexible string.
Three types are cemented cap, interlinking suspension, and core suspension insulators.
There are several types of overhead line insulators. The pin insulator supports the wire at the top or at the one side as shown in fig. If one disc can sustain an 11kv voltage capacity and six discs can sustain 66kv voltage. Each insulator can have multiple insulating discs.
The conductor is suspended at the bottom end of this string while the other end of the string is.
Pin, suspension, and strain insulators are used in medium to high voltage systems. The conductor is suspended at the bottom end of the string and the other end is secured to the. The suspension type of insulator is sometimes also called disc insulator. The suspension insulator separates the line conductors and supports them electrically.
Instead of using two suspension type insulators, pin type insulator is used.
Cap and pin type & interlink type are the types of suspension insulator, and it has several advantages. These are commonly used in power networks up to 33 kv system. It is designed for low voltage, upto 11 kv. In the transmission and distribution systems, six different types of insulators are used.
In addition to this, suspension type insulator is cheaper than pin insulators for voltage beyond 33kv.
These six types of insulators are selected on the bases of voltage rating. There are 5 types of insulators used in transmission lines as overhead insulation: Hence the transmission voltage is more than 50 kv, the suspension type insulators are preferred. Following are the types of insulators used in power system:
It operates at above 33kv and overcomes the limitation of pin type insulator like the following.
A suspension type insulator protects an over headed transmission line like a conductor. Pin insulators are used for holding the line conductors on the straight running of poles. This insulator is used in power transmission lines for up to 33kv. It is mostly used in domestic power distribution and low voltage transmission lines.
Why is the wavy structure of pin insulators used?
A suspension type insulator protects an over headed transmission line like a conductor. The most commonly used types are. Pin insulators or pin insulators are widely used in power distribution systems with voltage levels up to 33 kv. Suspension insulator or disc or string insulators.
Suspension type insulator is used for applications upto 765 kv.
Suspension types insulators are also called as string insulator or disc insulators. Type of insulators used in transmission lines. Pin insulators are commonly used in power networks up to 33 kv system post insulator is suitable for lower voltage and also for high voltage each suspension disc is designed for normal voltage rating 11 kv (higher voltage rating 15 kv), so by using different numbers of discs, a suspension string can be made suitable for any voltage level; As they become too large and uneconomical.
The suspension type insulators are generally used with the steel towers.
The main types of insulators used for overhead lines are. Depending upon voltage used, desired number of disc can be connected in series. Used on straight running transmission lines to transmit voltages upto 11 kv. Pin, suspension, and strain insulators are used in medium to high voltage systems.
Generally, it is made up of porcelain material that includes single or a string of insulating discs hanged over a tower.
The conductor is placed on the top side of the insulator where there is groove to fix. It operates at above 33kv and overcomes the limitation of pin type insulator. Pin type insulator is used for applications upto 11 kv to 33 kv. These insulators consist of a number of porcelain discs connected in series by metal links in the form of a string.
Pin type insulator is the most common and old insulator but till the day it used very much.
As the figure is given below shows the plane of discs of the strain insulator is vertical. Suspension insulators consist of a number of porcelain discs connected in series by metal links in the form of a string. While stay and shackle insulators are mainly used in low. This insulator is designed with aid of advanced tools & technology to impart excellent functionality to it.
These insulators can also be used to support high voltage conductor jumpers or leads.
Mostly, suspension insulator is made of glass or porcelain discs connected in series by metal links in the form of a string. As the pin insulators cannot be used if the voltage is more than 50kv. Why pin insulators are not used above 33kv? The suspension insulator is mainly made of sealed materials made of glass or porcelain.
While stay and shackle insulators.
The cost of the suspension type insulators is very less as the voltage rating is high. It may be used in one part or multiple parts. Pin type insulator is mostly used in 11kv lines but somewhere it is used up to 33kv lines. Strain type insulator is used for applications.
These insulators are used on intermediate poles on a straight run;
There are 5 types of insulators used in transmission lines as overhead insulation: Insulators are classified into six different major types.
