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Indoor MV Vacuum Circuit Breaker

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Your Professional Indoor MV Vacuum Circuit Breaker Supplier

 

Founded in 2014, Shaanxi West Power Tongzhong Electrical Co., Ltd. is a leading innovator in the electrical industry with over 20 years of industry experience. The company specializes in the production of various types of Indoor MV vacuum circuit breaker, mainly including VTZ-12 vacuum circuit breaker, VS1-12 vacuum circuit breaker, ZN85-40.5 vacuum circuit breaker, etc.

 

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.

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Advantages of Indoor MV Vacuum Circuit Breaker
VTZ-24 Vacuum Circuit Breaker
VTZ-12 Vacuum Circuit Breaker
VTZ-12C Vacuum Circuit Breaker with Lateral Operating Mechanism
VTZ/CS-12 Vacuum Circuit Breaker with Lateral Operating Mechanism

Minimal maintenance requirements
One of the notable advantages of MV VCBs is their minimal maintenance requirements. The design of these breakers includes fewer moving parts and a vacuum environment that prevents oxidation and contamination. This results in a highly reliable device that requires less frequent maintenance, reducing the risk of operational failures and enhancing safety.

 

Reduced risk of fire hazards
Unlike oil or gas-insulated circuit breakers, MV VCBs do not use flammable materials for arc quenching. The vacuum environment efficiently extinguishes arcs without the need for oil or gas, eliminating the associated fire hazards. This feature is particularly important in industrial and commercial settings where fire safety is a critical concern.

 

Enhanced longevity and durability
The materials used in MV VCBs are designed to withstand the rigors of high voltage operations. The vacuum interrupter ensures that internal components remain free from contamination and wear, extending the operational life of the breaker. This durability translates to fewer replacements and a lower risk of failures due to aging equipment, enhancing overall safety.

 

Compact and versatile design
The compact design of MV VCBs makes them suitable for a wide range of applications, from industrial plants to commercial buildings. Their versatility allows for easy integration into existing systems, providing reliable protection without requiring significant modifications. This adaptability makes them a preferred choice for various settings.

 

Cost-effectiveness
Although the initial cost of MV VCBs might be higher than some alternatives, their long-term benefits outweigh the upfront investment. The reduced maintenance costs, longer operational life, and enhanced safety features contribute to overall cost savings. These factors make MV VCBs a cost-effective solution for protecting electrical systems.

 

Application of Indoor MV Vacuum Circuit Breaker
 

Industrial applications
VCBs have found wide applications in different industries to protect motors, transformers, and other electrical utilities. Because they can withstand high currents and afford dependable protection, they are applicable in industries.

 

Power plants
VCBs are fundamental components of power generation plants, acting as electric arc protectors for power grids safely and efficiently. Their application helps guarantee that any electrical problem is tended to as soon as possible, thus reducing the probability of power blackouts or equipment destruction.

 

Commercial buildings
In commercial structures where power distribution for medium voltage is needed, VCBs safeguard electrical installations from overloading and short circuits. They are small and, therefore, easily applicable to building installations.

 

Components of Indoor MV Vacuum Circuit Breaker

 

Fixed contact

Electricity flows into the circuit and goes through the fixed or stationary contact. This contact stays in place whether the circuit is open or closed.

01

Movable contact

The current flows from the fixed contact to the movable contact. If the circuit is tripped, the movable contact moves away from the fixed contact, stopping the flow of electricity.

02

Vacuum interrupter

In a VCB, the arc is created in a vacuum. A vacuum is an excellent insulator and quickly extinguishes the arc.

03

Actuator mechanism

The actuator mechanism is connected to the tripping mechanism and the movable contact. Whenever the circuit is tripped, it forces the actuator mechanism to move the circuits apart.

04

 

How to Maintain Indoor MV Vacuum Circuit Breaker
 

Visual Inspection: Check for any signs of physical damage such as cracks or corrosion on the circuit breaker. Inspect the electrical connections, control wiring, and attachments for any signs of wear and tear.

Cleaning: Regularly clean the circuit breaker exterior and interior using a soft dry cloth or vacuum cleaner. If required, use distilled water or mild solvent to remove stubborn dirt and dust.

Testing Procedures: Perform tests such as insulation resistance, contact resistance, over-potential, and timing check to ensure optimum performance of the circuit breaker.

Contact Resistance Check: Check the condition of fixed and floating contacts, and inspect the positioning of contacts.

Insulation Resistance Check: Measure the insulation, phase-to-phase, and phase-to-earth using an appropriate meter to verify the insulation resistance values.

Timing Check: Perform timing tests to ascertain that the breaker’s opening and closing times are accurate.

 

Certifications
 
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FAQ
 

Q: What are the parts of a vacuum circuit breaker?

A: The vacuum circuit breaker consists of a vacuum arc quenching chamber (also called bottle), current terminals, traction insulator, control element, and an electromagnetic actuator.

Q: What is the life expectancy of a vacuum circuit breaker?

A: Vacuum circuit breakers have approximately a 20 to 30 year life expectancy. With these vacuum circuit bottles having the potential to operate beyond their designed life expectancy. It is extremely important that a regular maintenance program be established.

Q: How vacuum is maintained in VCB?

A: The breaker's fixed and movable contacts are housed within the arc shield. At the time of sealing off, the pressure in a vacuum interrupter is kept at around 10−6 torr. Depending on the working voltage, the circuit breaker's movable contacts travel a distance of 5 to 10 mm.

Q: What are the possible applications of a vacuum circuit breaker?

A: The technology is mainly suitable for mainly medium voltage applications. For higher voltage vacuum technology has been developed, but it is not commercially feasible. Vacuum circuit breakers are used in metal-clad Switchgear and also in porcelain housed circuit breakers.

Q: How to check vacuum in vacuum circuit breaker?

A: The presence of the vacuum is verified by applying a voltage across the open contacts of the vacuum interrupters VI's higher than the breakdown voltage of such contacts in air. This procedure has a 50 years proven record and has found world wide acceptance.

Q: Why is vacuum breaker the preferred type in MV distribution circuits?

A: Some key vacuum circuit breaker advantages include a long service life, efficient arc quenching, compact design, low maintenance requirements, and environmental friendliness.

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

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