Specific Vacuum Circuit Breaker

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Why choose us

Excellence in research and development
Innovation is at the core of our business. We have independently developed the VTZ Series Vacuum Circuit Breakers and continue to invest in research and development to meet the evolving needs of the electrical industry. Our R&D team consists of senior technical experts with decades of experience in the design and manufacture of high and low voltage electrical equipment. Their expertise, combined with our advanced facilities, allows us to stay ahead of industry trends and continually optimize our product offerings.

Advanced manufacturing and production
We operate one of the most advanced and standardized assembly line manufacturing facilities in the industry, equipped with the latest technology, enabling us to produce a wide range of high quality electrical products with precision and efficiency. Wecomply with GB 1984-2024 and GB/T11022-2020 standards to ensure the highest quality. Our commitment to excellence is reflected in the durability, reliability, and compatibility of our products.

Adapting to industry trends
Guided by our strategic development plan, we continuously adapt our products to align with the latest trends in smart grids, power system automation, and high altitude environments. Our leading high-current, high-voltage, and long-life products are designed to meet the rigorous demands of today's power systems, providing our customers with reliable, maintenance-free solutions that stand the test of time.

Wide range of products
We offer a wide range of products, including indoor and outdoor vacuum circuit breakers, switchgear, low voltage switch equipment, and various electrical accessories. Each product is designed to meet the specific needs of our customers, and can operate stably in urban distribution networks, industrial melting, new energy power generation, rural power supply and other places, and can still maintain excellent reliability even in harsh environments.

VTZ-15/T5000-63 Indoor High-voltage Generator Circuit Bre...

1. Rated Voltage：15kV. 2. Operating Mechanism: Integrated operating mechanism.. 3. Installation Method: Floor-standing, Fixed-mounted Drawout Unit. 4. Compatible Cabinet: Special fixed cabinet from

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VTZ-12 Indoor Phase-controlled Vacuum Circuit Breaker

1.Rated Voltage：12kV. 2.Rated Frequency：50/60Hz. 3.Rated current：630/1250A. 4.Rated short-circuit breaking current：25/31.5 kA. 5.Rated-short-circuit making current (peak)：63/80 kA. 6.Mechanical

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VTZ-12T Vacuum Circuit Breaker For Underground High Explo...

1. Rated Voltage: 12kV. 2. Operating Mechanism: modular operating mechanism. 3. Installation Method:mining high-explosive cabinet. 4. Compatible Cabinet: new combination high-explosive cabinet.

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VTZ-12T Mine High Explosive Cabinet Improved Vacuum Circu...

1.Rated Voltage：12kV. 2.Rated Frequency：50/60Hz. 3.Rated current：1250A. 4.Rated short-circuit breaking current：25/31.5 kA. 5.Rated-short-circuit making current (peak)：63/80 kA. 6.Installation method:

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VTZ-12T Vacuum Circuit Breaker For in Mines

1.Rated Voltage：12kV . 2.Rated Frequency：50/60Hz. 3.Rated current：1250A. 4.Installation method: mining high-explosive cabinet. 5.Applicable cabinet: PJG-10 series switch cabinet; new combination

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VTZ-12T Mine Explosion-Proof Vacuum Circuit Breaker

1. Rated Voltage: 12kV. 2. Operating Mechanism: modularized operating mechanism. 3. Installation Method: Mining explosion-proof switchgear.. 4. Compatible Cabinet: Compatible with PJG9-10 series

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VTZ-12MT Mine Explosion-Proof Vacuum Circuit Breaker

1. Rated Voltage: 12kV. 2. Operating Mechanism: Combination of permanent magnet operation mechanism and spring operation mechanism.. 3. Installation Method: Mining explosion-proof switchgear.. 4.

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ZN42-27.5 Railway-Specific Vacuum Circuit Breaker

1. Rated Voltage: 27.5kV. 2. Operating Mechanism: Spring Operating Mechanism.. 3. Installation Method: Floor handcart type.. 4. Compatible Cabinet: Compatible with JYN-27.5 switchgear.. 5. Product

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VTZ-12F Generator Output-Specific Vacuum Circuit Breaker

1. Rated Voltage：15kV. 2. Operating Mechanism: Integrated operating mechanism.. 3. Installation Method: Floor handcart fixed installation.. 4. Compatible Cabinet: Special fixed cabinet from the XGN

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Advantages of Specific Vacuum Circuit Breaker

High dielectric strength
The vacuum inside the breaker has high dielectric strength, making VCBs highly effective at interrupting high voltage currents. This characteristic allows for compact designs as the distance required between contacts to quench the arc is significantly reduced compared to air circuit breakers.

Long operational life
VCBs are renowned for their durability and long operational life. The vacuum environment minimizes the erosion of the contacts due to arcing, ensuring that the circuit breaker can operate for many thousands of cycles without significant maintenance.

Minimal maintenance
One of the most significant advantages of VCBs is their low maintenance requirements. The sealed vacuum interrupters do not degrade over time as air or oil interrupters do, which means that VCBs require less frequent inspections and servicing, leading to lower operational costs over their lifecycle.

Fast operation and quick recovery

VCBs are capable of interrupting and establishing currents very quickly, which is crucial for protecting electrical equipment and systems from damage during fault conditions. Moreover, the dielectric strength of the vacuum recovers rapidly after arc extinction, allowing the circuit to be restored swiftly.

Environmentally friendly

Unlike SF6 circuit breakers, VCBs do not use sulfur hexafluoride gas, which is a potent greenhouse gas. This makes VCBs a more environmentally friendly option for medium-voltage applications, aligning with global efforts to reduce carbon footprints and combat climate change.

High interrupting capacity

One of the most compelling advantages of VCBs lies in their exceptional ability to interrupt large fault currents. This characteristic is particularly crucial in medium voltage (MV) applications, where equipment like transformers and switchgear are susceptible to damage from these high currents. During fault events, the vacuum environment within the breaker extinguishes the arc rapidly and efficiently, effectively limiting fault damage and ensuring system stability.

Application of Specific Vacuum Circuit Breaker

VTZ-12F Generator Output-Specific Vacuum Circuit Breaker

Substations

These critical junctions within power grids house transformers, switchgear, and control equipment. VCBs are strategically placed within substations to protect these components from faults and ensure their reliable operation.

ZN42-27.5 Railway-Specific Vacuum Circuit Breaker

Distribution lines

MV lines deliver electricity to industrial and commercial facilities. VCBs are employed at strategic points along these lines to isolate faulty sections and prevent widespread outages.

Wind farms

The growing adoption of wind power necessitates reliable protection for wind turbines and associated electrical infrastructure. VCBs, with their compact size and ability to withstand harsh environmental conditions, are well-suited for this application.

Industrial plants

VCBs safeguard critical equipment within industrial facilities, such as motors, transformers, and control panels, minimizing downtime and ensuring production continuity.

Components of Low Voltage Switch Equipment

Circuit breakers
These critical devices are designed to automatically cut off electrical power when abnormal conditions, such as an overload or short circuit, occur. Depending on the application, circuit breakers come in various types, including moulded case circuit breakers (MCCBs) and miniature circuit breakers (MCBs).

Disconnect switches
Disconnect switches isolate electrical circuits from the power supply, providing a safe environment for maintenance or repairs.

Fuses
Fuses provide overcurrent protection by breaking the circuit when excessive current flows through them. Unlike circuit breakers, fuses need to be replaced after they blow.

Busbars

Busbars are conductive strips that distribute power within the switchgear assembly, and they provide a low-resistance pathway for electrical currents to flow.

Protection relays

These intelligent devices monitor the electrical system and initiate protective actions, such as opening a circuit breaker if an abnormal condition is detected.

Meters and monitoring devices

Modern switchgear is often equipped with meters and sensors to monitor system performance, including current, voltage, and power quality.

Components of Specific Vacuum Circuit Breaker

01/

Vacuum interrupter
The vacuum interrupter is the core component of a VCB. It consists of a fixed contact and a moving contact enclosed in a vacuum-sealed ceramic or glass envelope. When the circuit breaker is closed, the contacts are in contact, allowing current to flow. When the circuit breaker is tripped, the contacts separate, creating an arc. The vacuum interrupts the arc, extinguishing it quickly and efficiently.

02/

Operating mechanism
The operating mechanism controls the opening and closing of the circuit breaker contacts. It can be manual, spring-operated, or motor-operated, depending on the application. The operating mechanism must provide sufficient force to separate the contacts and maintain them in the open position.

03/

Insulating enclosure
The vacuum interrupter is housed in a sturdy insulating enclosure that protects it from environmental factors and maintains the vacuum integrity. The enclosure is typically made of high-quality insulating materials such as ceramic or glass.

04/

Arc chutes
Arc chutes are used to facilitate the interruption of the arc and to cool and deionize the arc gases. They are typically made of metal plates or fins that are arranged to create a path for the arc to follow, allowing it to extinguish quickly.

05/

Control and protection system
Modern VCBs are equipped with advanced control and protection systems that monitor the electrical parameters and actuate the circuit breaker when abnormal conditions are detected. These systems help to ensure the safe and reliable operation of the circuit breaker.

06/

Auxiliary contacts
Auxiliary contacts are used to provide feedback to the control system and to indicate the status of the circuit breaker (open or closed). They are also used for remote operation and monitoring of the circuit breaker.

Certifications

FAQ

Q: What are the main components of a vacuum circuit breaker?

A: Vacuum circuit breakers (VCBs) play a crucial role in the realm of high-voltage electrical systems. They are essential for protecting electrical circuits and ensuring operational efficiency. As a professional in the field, I often receive questions about the main components of a vacuum circuit breaker and their functions. Understanding these components can enhance our knowledge of VCBs and their application in various power systems.

Q: What makes vacuum circuit breakers unique compared to other types of circuit breakers?

A: VCBs utilize a vacuum as the medium for interrupting the electrical current. This unique property provides several advantages, such as a compact design, minimal maintenance, and an extended lifespan. The contacts within a VCB are enclosed in a vacuum chamber, which prevents the formation of an electric arc during the interruption of current. This feature distinguishes VCBs from air-insulated or oil-insulated circuit breakers.

Q: What are the advantages of using vacuum circuit breakers in high-voltage applications?

A: One significant advantage is their ability to operate under high voltage conditions without requiring extensive insulating materials. This results in a smaller footprint compared to traditional circuit breakers. Additionally, VCBs have a fast response time, which is critical in protecting sensitive equipment from electrical faults. Their durability and reliability make them ideal for use in various environments, including industrial and commercial settings.

Q: How does a load break switch function in conjunction with a vacuum circuit breaker?

A: Load break switches are often integrated with VCBs to enhance their functionality. A load break switch allows for the safe interruption of current while maintaining a secure connection to the system. This is essential during maintenance activities, ensuring that equipment can be serviced without the risk of electrical shock or damage.

Q: What are the contacts of vacuum circuit breaker?

A: Their design is separated into three parts: fixed contacts, moving contacts, and an arc shield located inside the arc interrupting chamber. The vacuum circuit breaker's outside envelope is constructed of glass because the glass envelope helps in the examination of the breaker from the outside after the operation.

Q: What is the IEC standard for vacuum circuit breakers?

A: The high-voltage vacuum circuit breakers are designed and manufactured in accordance with latest IEC standard, IEC 60056, IEC 2300, and for indoor switchgear purposes.

We're professional specific vacuum circuit breaker manufacturers and suppliers in China, specialized in providing high quality products and service. If you're going to buy customized specific vacuum circuit breaker, welcome to get more information from our factory.

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