What is indoor high voltage vacuum circuit breaker?

What is indoor high voltage vacuum circuit breaker?

An indoor high voltage vacuum circuit breaker is an electrical switching device used to interrupt or break the flow of electrical current in high voltage power systems within indoor substations or switchgear installations. It is specifically designed to operate in medium to high voltage ranges, typically above 11 kilovolts (kV) up to several hundred kilovolts.

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Our company took the lead and passed the ISO9001 quality system certification. The company specializes in cooperating with State Grid, South Grid, high and low voltage electrical equipment, and supporting services

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Chongqing Xinsheng Technology Electric Co., Ltd. was founded in 2002 and is located in Chongqing, China, one of the four major municipalities in China.

It is a high-tech company engaged in the research, development, production and sales of pneumatic, air cylinder, high and low voltage electrical, outdoor vacuum circuit breakers, indoor high voltage vacuum circuit breakers, indoor high voltage isolation switches, stainless steel photovoltaic distribution boxes, furniture and household appliances and other products. Technology industry company, its products are widely used in power transmission and distribution, machinery, metallurgy, hydropower, petrochemical, mining, transportation, construction, urban and rural power grid transformation and other power grid home appliance construction projects.

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Construction and working principle

The basic structure of VCB includes vacuum bottle, contacts, control mechanism and arc extinguishing chamber. The vacuum bottle is a sealed container filled with vacuum, which can effectively prevent the generation of arc. Contacts are usually made of copper or silver and are capable of withstanding high voltages and currents. When a fault occurs, the control mechanism operates the VCB to separate the contacts, thereby cutting off the circuit.

Advantages and Features of VCB

VCBs have many advantages over other types of circuit breakers. First, due to the vacuum break, the VCB can reliably cut off high voltages and currents without generating harmful gases or by-products. Second, VCB has a long service life and low maintenance requirements, saving operating costs. In addition, VCB is installed indoors and is suitable for various environments.

Working process of vacuum circuit breaker

When a fault occurs, the VCB generates an arc through the separation contacts. This arc is directed to an arc chute where it is controlled and eliminated by an arc extinguishing device. The arc extinguishing chamber quickly extinguishes the arc by using technologies such as cooling and deionization, and efficiently converts the arc energy into heat and light energy.

Fields of application and future development

Indoor high-voltage vacuum circuit breakers are widely used in the fields of power generation, transmission and distribution of power systems, as well as industrial and commercial facilities. As power demands grow and technology continues to advance, VCBs continue to evolve in design and functionality. Future development trends will mainly focus on increasing the capacity, reliability and intelligence of circuit breakers to meet changing power demands.

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Frequently Asked Question

Do you have any question?

Vacuum circuit breakers offer several advantages. Firstly, they can interrupt high fault currents without generating harmful gases or byproducts, making them environmentally friendly. Secondly, they have a longer lifespan and require less maintenance compared to other circuit breaker types. Lastly, their compact design and suitability for indoor installation make them an ideal choice for various applications.

When a fault occurs, the control mechanism activates the VCB, causing the contacts to separate. This action creates an arc between the contacts, which is then directed into the arc extinguishing chamber. The vacuum inside the chamber helps to prevent the arc from re-striking, and various techniques, such as cooling and deionization, are employed to extinguish the arc efficiently.

Indoor high voltage vacuum circuit breakers find extensive use in power generation, transmission, and distribution systems. They are also employed in industrial facilities, commercial buildings, and other areas where reliable protection against electrical faults is required. Their ability to handle high voltages and currents, combined with their safe and environmentally friendly operation, makes them a preferred choice for critical electrical infrastructure.

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