Types of Switchgear - Substation Equipment & Switching Devices - Protection & Switchgear Engineering

TL;DR

This video discusses the various types of switchgear devices, including low voltage switchgear, indoor switchgear, and high voltage switchgear.

Transcript

click the bell icon to get latest videos from equator hello friends in previous video we have studied what is definition of switch case basically switch gear consists of older devices which are connected in the power system in this video we are going to study what are the various types of switch gear devices so depending upon the system voltage the... Read More

Key Insights

• 😘 Low voltage switchgear includes circuit breakers, switches, isolators, fuses, and circuit breakers, and is rated up to 1 kV.
• 🤘 Indoor switchgear for medium voltage applications is enclosed in a metal enclosure and can be metal-enclosed or metal-clad.
• ⚡ High voltage switchgear deals with voltages 36 kV and above and requires special care due to high arcing.
• 🫢 Gas-insulated indoor switchgear requires less space and uses SF6 gas for insulation.
• 🅰️ Air-insulated outdoor switchgear can be either dead tank type or live tank type.
• 😘 Indoor switchgear is more reliable, safer, and has lower operating costs compared to outdoor switchgear.
• ✋ The main limitation of switchgear devices is the high installation cost.

Questions & Answers

Q: What is low voltage switchgear?

Low voltage switchgear is electrical switchgear rated up to 1 kV. It includes circuit breakers, switches, isolators, fuses, and circuit breakers. Its main purpose is to protect electrical systems from overloads and faults.

Q: What are the advantages of indoor switchgear?

Indoor switchgear is more reliable and safer compared to outdoor switchgear. It requires less space, has easier maintenance, lower operating costs, reduced risks of electrocution, increased security, and is less prone to environmental conditions.

Q: What is high voltage switchgear?

High voltage switchgear deals with voltages of 36 kV and above. It requires special care due to the high level of arcing produced during switching. Common types include minimum oil circuit breakers, air blast circuit breakers, and SF6 circuit breakers.

Q: What are the types of high voltage switchgear?

High voltage switchgear can be classified as gas-insulated indoor type or air-insulated outdoor type. Gas-insulated switchgear uses SF6 gas for insulation and requires less space, while air-insulated switchgear can be either dead tank type or live tank type.

Summary & Key Takeaways

• Switchgear devices are classified based on the system voltage, with low voltage switchgear being rated up to 1 kV and including circuit breakers, switches, isolators, fuses, and circuit breakers.

• Indoor switchgear is used for medium voltage applications and is enclosed in a metal enclosure. It can be metal-enclosed or metal-clad, with the latter using SF6 gas for superior dielectric properties.

• High voltage switchgear deals with voltages 36 kV and above and requires special care. It can be gas-insulated indoor type or air-insulated outdoor type, with each having its advantages and drawbacks.