What are the common types and characteristics of high-voltage switchgear?

What is a high-voltage switchgear?

The high-voltage switchgear is the core electrical equipment used in power system generation, transmission, distribution, electric energy conversion and consumption, which mainly plays the role of on-off, control or protection. ‌It consists of high voltage circuit breaker, high voltage isolation switch, etc., and the voltage class is between 3.6kV and 550kV. The high-voltage switchgear is widely used in the power distribution system, which can input or exit some power equipment or lines according to the operation needs of the power grid. And it can quickly remove the fault part when the fault occurs to ensure the normal operation of the fault-free part of the power grid. ‌‌

high-voltage switchgear

What are the common types and characteristics of high-voltage switchgear?

1. Box type high-voltage switchgear

Box type high-voltage switchgear is welded by steel plate and has high sealing and reliability. Box type high-voltage switchgear usually adopts fixed structure. It is mainly used in outdoor power station, distribution room and other occasions. And it has strong shock resistance, anti-environmental pollution and other advantages.

2. Fixed high-voltage switchgear

Fixed high-voltage switchgear is a common type of high-voltage switchgear. It is suitable for various power systems and can be used by on-site installation and fixing. The fixed high-voltage switchgear has the characteristics of compact structure and easy operation.

3. Detachable high-voltage switchgear

The detachable high-voltage switchgear is a multifunctional switchgear. It has a detachable box structure and is suitable for various occasions. The switchgear can be used in various occasions such as low voltage area, distribution power station, substation, etc. It has the characteristics of flexible operation and convenient maintenance.

4. Combined high-voltage switchgear

The combined high-voltage switchgear is a kind of high-voltage switchgear built in the public closed structure. It has the important characteristics of flexible installation, modular electrical device, multi-function and multi-expansion. The combined high-voltage switchgear is the most widely used type of high-voltage switchgear at present, which is suitable for substations, distribution rooms, industrial control centers and other occasions.

5. Cabinet type high-voltage switchgear

Cabinet type high-voltage switchgear is a segmented structure. It is mainly composed of frame, cabinet, feed, take-up cabinet, shielding shielding room and operating mechanism. The cabinet type high- voltage switchgear has the characteristics of reasonable structure and strong device flexibility, etc. It is mainly used in substations, urban distribution centers, industries and mining plants.

switchgear

The important role of high-voltage switchgear in distribution network

1. Ensure power supply security

The high-voltage switchgear is one of the important equipment in the distribution network. It can control and distribute the current and ensure the safety and stability of the power supply system. When the power system fails, the high-voltage switchgear can quickly cut off the circuit to prevent the expansion of the fault, so as to ensure the safety of the entire power supply system.

2. Improve power supply efficiency

The high-voltage switchgear can not only regulate the current, but also distribute the current to different electrical equipment, thereby improving the power supply efficiency. Through the intelligent control of the high voltage switchgear, different loads can be optimized and balanced, which can avoid no-load and overload phenomena and improve the power supply efficiency and stability.

3. Reduce operating costs

High-voltage switchgear can also achieve remote intelligent control and automated operation, which effectively reduces labor and operating costs. The high-voltage switchgear can realize the fine management of electric energy. It makes the use of energy more efficient and economical, which helps enterprises to reduce energy consumption and save costs.