What is valve type lightning arrester?

What is valve type lightning arrester?

Valve type lightning arrester is an improved and expensive lightning arrester which is also called a nonlinear surge diverter. A valve type arrester gets its name from the fact that a nonlinear resistor regulates itself from the flow of current and reduces the voltage when high surge currents occur.

What are the types of lightning arrester?

Heeding these above factors, there are twelve types of lightning arresters.

• Rod Gap Arrester.
• Sphere Gap Arrester.
• Horn Gap Arrester.
• Multiple-Gap Arrester.
• Impulse Protective Gap Arrester.
• Electrolytic Arrester.
• Expulsion Type Lightning Arrester.
• Valve Type Lightning Arresters.

What is the working principle of lightning arrester?

Lightning Arresters The principle is that once the voltage surge travels across the conductor and reaches the place where it is to be installed. So it will break the insulation of the conductor for a moment so that the voltage surge can be discharged towards the ground.

What are the advantages of valve type lightning arrester?

Advantages of Valve Type Lightning Arrester Provide very reliable and effective protection to the equipment like cables, transformers and other equipments. The impulse ratio is the ratio of Breakdown voltage under surge condition to the Breakdown voltage under low frequency condition, which is practically unity.

Which type of lightning arrester is used in substation?

Valve-type Lightning Arrester. A valve type of lightning arrester is used to protect the substations, line termination, and electrical equipment. This device discharges overvoltage (due to lightning) into the earth or earth grid. It is also called the Non-linear type.

Where is the valve type lightning arrester used in substation?

Station Type Valve Lightning Arrester – This type of valve is mainly employed for the protection of the critical power equipment in the circuit of 2.2kV to 400kV and higher. They have the high capacity of energy dissipation.

What are the types of lightning?

There are three primary types of lightning which include: cloud-to-ground (the most commonly known type), cloud-to-air, and cloud-to-cloud. With cloud-to-ground lightning, the rapid discharge of lightning is a channel of negative charge that is attracted to the positively charged ground.

What LA is used for substations?

A valve type of lightning arrester is used to protect the substations, line termination, and electrical equipment. This device discharges overvoltage (due to lightning) into the earth or earth grid. It is also called the Non-linear type.

Is lightning DC or AC?

Second, lightning is a direct current (DC) that would require it to be converted to alternating current (AC) so it could be used for lights and other equipment.

What are the 6 types of lightning?

6 Types of Lightning

• Cloud-to-Ground (CG) Lightning.
• Negative Cloud-to-Ground (-CG) Lightning.
• Positive Cloud-to-Ground (+CG) Lightning.
• Cloud-to-Cloud (CC) Lightning.
• Intra-Cloud Lightning.
• Ball Lightning.

Does the IEEE lightning arrester model affect the voltage induced by lightning?

SOLIDWORKS software was utilized in this study to access the performance analysis and application of an 11kV valve-type surge diverter modelled after the IEEE lightning arrester model. Different lightning arrester models are presented. By Slight variation to the IEEE model, a 92% reduction in the lightning-induced voltage was recorded.

What is the rated voltage of a lightning arrester?

The Arrester Rated Voltage is given as: = ( ) (7) The lightning arrester designed is to be installed on a 11-kV transmission line i.e. a transmission line with system voltage of 11-kV (rms).

What is the mcov of a lightning arrester?

Which implies that MCOV, which is 85% of the chosen voltage is 7.65kV For this study, a lightning arrester, to be installed on a transmission line, is designed using the SOLIDWORKS software. The structure of the lightning arrester and the SOLIDWORKS design consist of the following four (4) main parts.

How do lightning arresters work?

They can be greatly suppressed by lightning arresters. The designed lightning arrester performs optimally as it greatly reduces the lightning-induced voltages recorded at specific loads in a 132/11 kV power system network by about 92 as can be seen in Table 5.