How many insulators are in 11kv line?

In a 11 kV system we generally use one part type insulator where whole pin insulator is one piece of properly shaped porcelain or glass. As the leakage path of insulator is through its surface, it is desirable to increase the vertical length of the insulator surface area for lengthening leakage path.

Which insulator is used for 11 kV line?

For low voltage lines (<11 kV) shackle insulators are used as strain insulators. Stay insulators are also known as strain insulators and are generally used up to 33 kV line. These insulators should not be fixed below three meters from the ground level. These insulators are also used where the lines are strained.

How do you calculate the number of disk insulators for transmission lines?

we know that each insulator disk can tolerate upto 11kv,for example when we want to find no. of 220kv,first find phase voltage for 220kv and then divided by 11kv. no. of discs=127/11=12.

What is disc insulator?

Definition: An insulator that is made up of high-grade wet processes like brown-green glazed is known as disc insulator. These insulators are used in transmission & distribution systems. For insulation material, its relative permittivity is high. It uses materials like non-porous or waterproof.

Where is disc insulator used?

Disc insulators are used in high voltage transmission and distribution lines which are designed for fulfilling the required electro mechanical strength. Disc insulators are used for providing insulation as well as support to the line conductors in suspension and tension systems, as required.

What is 11kV line?

The 11kV lines are used in residential areas and is what feeds the local transformers, which then distributes power to the buildings in the area. This power can then be safely distributed in order to power a town near the transformer.

How many types of disc insulators are there?

Types of Disc Insulators Disc insulators can be classified into two types of suspension disk insulators and strain disk insulators.

What is electric corona?

Corona Discharge (also known as the Corona Effect) is an electrical discharge caused by the ionization of a fluid such as air surrounding a conductor that is electrically charged. Corona discharge can cause an audible hissing or cracking noise as it ionizes the air around the conductors.

What is electrical corona discharge?

Corona is a luminous, audible discharge that occurs when there is an excessive localized electric field gradient upon an object that causes the ionization and possible electrical breakdown of the air adjacent to this point. These items have detrimental affects on materials, inclusive of electrical insulators.

How many disc insulators are there in a power transmission line?

In a Power Transmission line more is the number of disc insulators higher will be the voltage rating of that transmission line. For example in case of 132 KV line a string of 11 disc insulators are connected. In case of 220 KV usually 16 disc insulators are used.

What type of insulator is used in 11 kV power system?

In a 11 kV system we generally use one part type insulator where whole pin insulator is one piece of properly shaped porcelain or glass. As the leakage path of insulator is through its surface, it is desirable to increase the vertical length of the insulator surface area for lengthening leakage path.

How many discs can be connected together to make an insulator?

Each unit of disc is designed for a low voltage, say 11 kV. Hence, depending upon the working voltage, desired number of discs can be connected in series to form an insulator string suitable for particular voltage.

How many discs are used in a 400 kV transmission line?

In a 400 KV line 25 discs are used. This is a trick and sometimes assumption may vary but generaly 33 kv disc insulator are being used in transmission line. We know the standard transmission voltage are 132 KV, 220 KV, 400 KV and 765 KV.