Features of Vacuum Circuit Breaker
- It adopts high-vacuum arc extinguishing and can quickly and reliably break all kinds of currents.
- The vacuum interrupter is small in size, which saves installation space.
- Fully sealed design, no need to inspect the arc-extinguishing medium, and low operation and maintenance costs.
- No explosion risk, stable insulation, and suitable for harsh environments.
- Free of oil and SF₆ gas, green and low-carbon.
Your Reliable Vacuum Circuit Breaker Supplier
The vacuum circuit breakers supplied by ZHONGSHAO use vacuum as the arc-extinguishing and insulating medium, which can effectively control and protect circuits in power systems, promptly cut off fault currents and ensure the safety of your equipment.
ZHONGSHAO is a professional supplier of step-down transformers, providing you with one-on-one solutions. If you have any other questions about ZHONGSHAO’s power system solutions, please feel free to contact us at any time for professional advice.
A high quality 25kA breaking capacity fixed indoor high voltage vacuum circuit breaker with a 12kV rated voltage and customizable rated current available.
A single phase 50Hz rated frequency along with a 12kV breaking capacity indoor type high voltage vacuum circuit breaker.
A high performing industrial vacuum circuit breaker with high efficiency and can be customized with different rated current, rated voltage, and rated current.
A fixed indoor vacuum circuit breaker with a high voltage capacity and has a customizable rated current, rated frequency, and rated voltage available.
A three phase 20kA breaking capacity and 12kV rated voltage vacuum circuit breaker and has a rated frequency of 50Hz.
An industrial three phase high voltage pole mounted vacuum circuit breaker with a 25kA breaking capacity and maximum operating temperature of 40 degree Celsius.
A high quality outdoor automatic high voltage vacuum circuit breaker with three phase and a 20kA breaking capacity and a 50Hz rated frequency.
A 630Amp rated current and a 25kA breaking capacity high voltage distribution vacuum circuit breaker for outdoor industrial use.
What is a Vacuum Circuit Breaker?
The ZHONGSHAO vacuum circuit breaker is a medium and high-voltage switchgear that uses a highly vacuum environment as the arc-extinguishing and insulating medium. It is equipped with a sealed vacuum interrupter. When the contacts separate, the generated metal vapor arc is quickly extinguished.
Vacuum circuit breakers have significant advantages such as strong breaking capacity, long service life, small size, no explosion risk and environmental friendliness, which are widely used in industrial, commercial and other fields, and is an indispensable key equipment for realizing circuit control and fault protection in power systems.
The Working Principle of Vacuum Circuit Breakers
Vacuum circuit breakers utilize high vacuum as the insulating and arc-extinguishing medium. In a sealed vacuum interrupter, when the contacts separate within the vacuum chamber, the current will cause the contact material to melt and evaporate, generating a plasma arc mainly composed of metal vapor.
Due to the lack of conductive medium in the vacuum environment, this arc column is very fine, bright and surrounded by metal vapor. At the moment of the natural zero-crossing of alternating current, metal vapor particles rapidly diffuse into the surrounding vacuum area at an extremely fast speed and quickly condense, causing the arc medium to disappear instantly. The high insulation strength of the vacuum is immediately restored, thereby efficiently and thoroughly extinguishing the arc and breaking the circuit. The entire process is fast and has no leakage.
The Function of Vacuum Circuit Breakers
Control On and Off
Our vacuum circuit breakers can safely and reliably connect and disconnect the rated working current of the line according to the dispatching instructions during the normal operation of the power system, which achieves flexible control of the circuit’s on-off.
Fault Protection
When serious faults such as short circuits and overloads occur in the power grid, vacuum circuit breakers can automatically trip at an extremely fast speed under the command of relay protection devices, strongly extinguish the fault arc to completely cut off the fault current, thereby protecting key equipment such as generators and transformers from damage.
Insulation Isolation
A reliable insulation gap is formed between the moving contacts and the static contacts of the vacuum circuit breaker by a high vacuum medium. This gap can withstand the high voltage of the system for a long time, electrically isolating the faulty line that has been cut off from the live power grid, providing a guarantee for the safety of the equipment and you.
Enhance System Stability
Vacuum circuit breakers can only disconnect the faulty local lines while maintaining the normal operation of other non-faulty parts of the power grid. This minimizes the scope of power outages and significantly enhances the power supply reliability and operational stability of the entire power system.
The Advantages of Using Vacuum Circuit Breakers
Outstanding Breaking Capacity
Vacuum circuit breakers can quickly and reliably extinguish arcs generated from load currents to large short-circuit currents by using high vacuum media. They perform exceptionally well when breaking small currents such as capacitor and inductor currents, effectively avoiding the risks of reignition and overvoltage.
Long Service Life
The electrical and mechanical life of our vacuum circuit breakers is much longer than that of traditional circuit breakers. Due to its low contact wear and a sturdy overall structure, it can still work stably for a long time in frequent operation scenarios.
Small Size and Compact Structure
Due to the extremely high insulation strength of the vacuum arc extinguishing medium, the required arc extinguishing distance is very small, which makes the vacuum arc extinguishing chamber very compact. Therefore, the design of the entire vacuum circuit breaker and the matching switch cabinet can be more compact, saving you a lot of installation space.
Low Maintenance Cost
The vacuum interrupter is of a fully sealed and non-detachable structure. During its normal service life, you do not need to maintain or replace the arc extinguishing medium. You only need to conduct simple mechanical characteristic checks regularly, which significantly reduces your operation and maintenance material costs.
Safe and Reliable
Our vacuum circuit breakers have no explosion risk during operation and are not affected by external environments such as temperature and altitude. Its high reliability and fast features provide a safety protection barrier for the power grid and your equipment.
Environmental Friendliness
The insulating and arc-extinguishing medium of vacuum circuit breakers is high vacuum, and they do not use insulating oil or the strong greenhouse gas SF6. This fundamentally avoids oil leakage pollution and greenhouse gas emissions, which meet the current environmental protection requirements.
The Application of Vacuum Circuit Breakers
Ensure the Operation of the Power Grid
Vacuum circuit breakers undertake the functions of protection, control and isolation of circuits. They are often used as incoming and outgoing line switches, busbar tie switches and transformer protection switches to ensure the safe and stable operation of regional power grids.
Industrial and Building Power Distribution
In the high-voltage distribution systems of industrial fields and large commercial buildings, vacuum circuit breakers are widely used for the protection and control of motors, generators, and large transformers. Its high reliability and long service life are particularly suitable for frequent operations and strict requirements in industrial environments.
New Energy Power Generation
Vacuum circuit breakers can reliably perform tasks such as current convergence, protection and fault isolation, and can adapt to the intermittent and fluctuating characteristics of new energy power generation, which ensures the safe connection of clean power to the power grid.
Rail Transit Power Supply
In the power supply systems of subways and electrified railways, vacuum circuit breakers can be used for the protection and control of DC or AC traction networks. Its rapid breaking capacity and high mechanical life meet the strict requirements of rail transit for power supply continuity, safety and frequent operation.
Specialized Applications
Due to its advantages of small size and no flammable or explosive media, vacuum circuit breakers are also often used in special occasions such as ships and mines, which provide safe and reliable electrical protection solutions for specific environments.
Vacuum circuit breakers adopt high vacuum arc extinguishing technology, which features stronger starting capacity, extremely long electrical life and almost maintenance-free operation. Meanwhile, they are completely free of oil and greenhouse gas SF6, making them safer and more environmentally friendly.
Our arc extinguishing chamber adopts a one-time sealing and discharging process and strict quality control to ensure its service life. We offer optional vacuum degree online monitoring device services or evaluate it through regular pressure resistance tests to ensure its condition is controllable.
The vacuum insulation strength is not affected by air humidity or altitude. Moreover, it is a fully enclosed structure as a whole and has passed rigorous environmental tests such as high altitude and salt spray, ensuring its reliability.
Our factory has established a semi-automatic production line. Before leaving the factory, each circuit breaker must pass multiple strict inspections such as characteristic tests, withstand voltage tests, and partial discharge monitoring to ensure that its performance parameters fully comply with standards and are consistent across batches.
You need to provide us with key parameters such as rated voltage, current, short-circuit breaking current, type of operating mechanism and usage environment. We offer standard products and customized design services, including special protection grades or specific size adaptations, etc.
