A Vacuum Circuit Breaker (abbreviated as VCB) is an electrical switching device designed to open and close electrical circuits in a vacuum. It uses a vacuum as the arc extinguishing medium, meaning that when the switch contacts are separated, the current is interrupted in a vacuum, which prevents the formation of an electric arc. Vacuum circuit breakers are typically used in medium and high voltage applications such as distribution systems and power plants.

Types of Vacuum Circuit Breakers

Vacuum circuit breakers are classified according to voltage class: 6–10 kV devices, 35 kV devices.

These switches have three poles, each containing a chamber and a contact prestressing unit (traction) and a spring drive.

Depending on their location, circuit breakers are divided into:

• Switcher for indoor installation are used as part of complete distribution devices.

• Outdoor switcher – used on open switchgears.

Vacuum circuit breakers are also classified by design: stationary and withdrawable.

Fixed switches are used as independent devices and as components of larger automatic equipment protection systems.

One of the advantages of stationary vacuum circuit breakers is their increased insulation capacity and the ability to operate at very high temperatures (from - 40 °C to + 40 °C, the lowest temperature limit is -60 °C).

Fixed switches have a rigid design and are intended for permanent use in fixed places, for example, special racks or cabinets. This allows them to provide a higher level of reliability and a long service life - more than 30 years.

Withdrawable devices are used in work with complete distribution devices. When working with withdrawable circuit breakers, it is possible to replace it without disconnecting the entire switchgear.

Vacuum circuit breakers are used in a variety of applications: for switching electric motors, heating, ventilation and air conditioning systems, as well as for other processes where high power switching is required.

There are also vacuum load switches. They are used in energy systems such as hydroelectric power plants, nuclear power plants and other energy industry facilities.

A vacuum load switch consists of contacts located in a vacuum chamber, which is filled with high-vacuum gas. When the switch is turned on, the contacts connect, allowing electrical current to flow through the circuit. When the load break switch is open, the contacts are disconnected, providing safety and protection to the electrical system.

Vacuum circuit breaker type

What are vacuum circuit breakers needed for?

The main application of vacuum circuit breakers is switching currents in electrical systems. They can quickly and reliably shut down the power system with possible damage. Thanks to this feature, accidents can be prevented.

Vacuum load switches are used to protect electrical equipment from overloads and short circuits. They are used in energy systems such as hydroelectric power plants, nuclear power plants, wind generators and other energy industry facilities.

Vacuum circuit breakers are used in the following areas:

1.Industry: used to control electric motors in industrial installations, for example, to control compressors, fans, pumps and other industrial machinery.

2.Electrical power industry: widely used in the electrical power industry for disconnecting and controlling electrical circuits, including power transmission, distribution and transmission.

3.Transport: used in electrical circuit control systems in railway electric trains and trams.

4.Medicine: Widely used in medical devices and equipment such as magnetic resonance imaging scanners and laser surgical systems.

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How to order and buy vacuum circuit breakers

1.The price of vacuum circuit breakers depends on technical parameters

2.additional functions

3.quantities

4.delivery region

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Hebei Libang Electric Technology Co.,Ltd, founded in 2000 and located in Hebei Province, China, covering an area of 20,000 square meters, is a group of companies integrating R&D, production, sales and service.

Our products cover various fields such as transformers, switches, distribution cabinets, electricity meters, electrical wires and cables, and are widely used in construction, energy, communications and other industries.

The company has its own scientific and technical group. All products can be individually designed taking into account structural, mechanical and electrical principles. We have advanced manufacturing equipment, inspection and testing equipment, production lines and computer network control systems, allowing us to be among the leading electrical equipment manufacturers in the country.

We have passed ISO9001, ISO14001, ISO45001, CQC quality system certification, test reports and other quality systems, and also have AAA credit rating certification.

We are committed to putting the customer at the center, establishing long-term partnerships and providing customers with innovative solutions to meet their ever-changing needs. We believe that outstanding quality and service are the key to our success, and we continually strive to improve our ability to provide customers with the best electrical products and services.

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