Outdoor MV Vacuum Circuit Breaker
Your Professional Outdoor MV Vacuum Circuit Breaker Supplier
Our goal is to become your true partner in the field of chassis truck for vcb in China. Shaanxi West Power Tongzhong Electrical Co., Ltd. is a leading manufacturer with over 20 years of experience, specializing in high quality vacuum circuit breakers, switchgears, and a wide range of electrical products. We have a skilled engineering team dedicated to refining every stage, from product development and process improvement to production oversight, ensuring every product delivered meets rigorous quality and performance standards. The price is competitive and the product is quality-assured, which is a good choice for your long-term cooperation.
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ZW7-40.5 Outdoor Vacuum Circuit Breaker With External Cur...
1. Rated Voltage: 40.5kV. 2. Operating Mechanism: Modular operating mechanism.. 3. Installation Method: Fixed installation with outdoor support.. 4. Product Compliance with Standards: GB/T1984-2014,Add to Inquiry -
ZW32-12M Permanent Magnetic Vacuum Circuit Breaker
1. Rated Voltage: 12kV. 2. Operating Mechanism: Permanent magnetic operating mechanism.. 3. Installation Method: Outdoor support/pole-mounted installation.. 4. Product Compliance with Standards:Add to Inquiry -
ZW32-24 Outdoor Vacuum Pole-Mounted Circuit Breaker
1. Rated Voltage: 24kV. 2. Operating Mechanism: Spring operating mechanism.. 3. Installation Method: Outdoor Bracket Mounting / Pole Fixed Installation.. 4. Product Compliance with Standards:Add to Inquiry -
ZW7-40.5 Highland Outdoor Vacuum Circuit Breaker
1. Rated Voltage: 40.5kV. 2. Operating Mechanism: Modular operating mechanism.. 3. Installation Method: Fixed installation with outdoor support.. 4. Product Compliance with Standards: GB/T1984-2014,Add to Inquiry -
ZW32-12 Outdoor Vacuum Circuit Breaker
1. Rated Voltage: 12kV. 2. Operating Mechanism: Operation Mechanism. 3. Installation Method: Outdoor scaffolding/Pole fixed installation. 4. Product compliance standards: GB/T1984-2014,Add to Inquiry -
ZW7-40.5 Outdoor Miniaturized Vacuum Circuit Breaker
1. Rated Voltage: 40.5kV. 2. Operating Mechanism: Modular operating mechanism.. 3. Installation Method: Fixed installation with outdoor support.. 4. Product Compliance with Standards: GB/T1984-2014,Add to Inquiry -
ZW7-40.5 Outdoor Vacuum Circuit Breaker
1. Rated Voltage: 40.5kV. 2. Operating Mechanism: Modular operating mechanism.. 3. Installation Method: Fixed installation with outdoor support.. 4. Product Compliance with Standards: GB/T1984-2014,Add to Inquiry -
ZW20-12 Outdoor Vacuum Circuit Breaker
1. Rated Voltage: 12kV. 2. Installation method:outdoor support type / pole fixed installation. 3. Compliance with Standards: GB/T1984-2014, GB/T11022-2011. 4. Product advantages: E2-C2-M2Add to Inquiry
Why Choose Us
Our R&D: 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, enables us to always lead industry trends and continuously optimize our product portfolio.
Quality control: We are able to accurately and efficiently produce a wide range of high-quality electrical products that comply with GB 1984-2024 and GB/T11022-2020 standards to ensure the highest quality.
Customization requirements: We know that our customers' needs are different, so each product can be designed according to the specific needs of the customer.
Our services: In the pre-sales stage, our team of experts will recommend the most suitable products according to the needs of customers and provide detailed technical consultation. During the sales period, we ensure timely delivery and provide installation guidance. For after-sales, we provide long-term technical support, warranty services and spare parts to help customers maximize the use of products and get reliable maintenance during use.
Advantages of Outdoor MV Vacuum Circuit Breaker
Convenient maintenance
The modular mechanism design allows for easy replacement of the closing and opening coils without the need for dismantling other components. This eliminates the need for testing or adjustment after replacement, ensuring users to replace them independently, making subsequent maintenance more convenient.
Standardized outdoor design
The ceramic insulated cylinder design is capable of meeting pollution degree level IV environments and offers rational waterproof and anti-corrosion performance. It is equipped with built-in condensation control.
Wide range of applications
Designed to withstand harsh environments, the product can endure temperatures as low as -25°C and meet usage requirements up to an altitude of 2000 meters. Under special requirements, it can operate at temperatures as low as -40°C and altitude up to 4000 meters.

Specification of Outdoor MV Vacuum Circuit Breaker
|
No. |
Name |
Unit |
Data |
|
1 |
Clearance between Moved and Fixed Contact |
Mm |
19±2 |
|
2 |
Contact Overtravel |
Mm |
4±1 |
|
3 |
Average Closing Speed |
M/s |
0.8±0.2 |
|
4 |
Average Opening Speed (Average Speed of First Opening at 12mm) |
M/s |
1.7±0.3 |
|
5 |
Rated Contact Pressure |
N |
3100±200N (25kA/31.5kA) 4800±300N(40kA) |
|
6 |
Closing Time |
Ms |
30~70 |
|
7 |
Opening Time |
Ms |
20~50 |
|
8 |
Contact Bouncing Duration at Closing Operation |
Ms |
≤3 |
|
9 |
No-Simultaneity of Closing/Opening Operations of 3-Phase |
Ms |
≤2 |

Medium voltage outdoor circuit breaker are equipped with a range of features that enhance their functionality and reliability. Their primary function is to detect and interrupt abnormal current flow, thus preventing potential hazards. Key features include thermal and magnetic trip mechanisms, which provide dual protection against overloads and short circuits.
Thermal trips respond to prolonged overcurrents by bending a bimetallic strip, while magnetic trips react instantly to high current surges by releasing a latch. Additional features, such as indicator windows and easy reset buttons, offer convenience and ease of use. The compact design of medium voltage outdoor circuit breaker allows for easy installation in confined spaces, making them a versatile choice for modern electrical systems.
Application of Outdoor MV 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.
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 Outdoor MV Vacuum Circuit Breaker
Vacuum interrupter
The vacuum interrupter is the most important component of the vacuum breaker. It is a sealed chamber having two contacts: Static contact and dynamic contact.
Static and dynamic contacts
The static contact is located at one end of the vacuum interrupter and remains stationary. This contact is a part of the electrical circuit and plays a vital role in conducting fault currents.
Arc shield
The arc shield is a vital component that protects other components from the heat and other effects generated when the arc is formed inside the vacuum interrupter.
Driving mechanism
The driving mechanism is the mechanism that is responsible for opening and closing the circuit breaker. This mechanism May be driven through electric motors, springs, or electromagnetic coils.
Control mechanism
The control mechanism is used to control and monitor the operation of the circuit breaker. It consists of control panels, relays, and switches, which provide commands to open and close the circuit breaker.
Insulator
Insulators are used to keep the various components of the circuit breaker electrically isolated. These play a vital role in controlling and isolating high voltage, thereby increasing the safety and reliability of the circuit breaker.
Bus bars
Busbars are a key component that helps distribute electrical current to various parts of a vacuum breaker. These are high-capacity conductors that play a vital role in conducting electrical current smoothly and safely.
Connectors
Connectors are used to interconnect various components of a circuit breaker. These ensure that electrical current can flow without interruption. The quality and reliability of connectors are crucial in the operation of a circuit breaker.
Packing and Shipping of Outdoor MV Vacuum Circuit Breaker
|
Packing |
Box |
|
Shipping |
Shipped by road, sea, rail |
FAQ
We're professional outdoor mv vacuum circuit breaker manufacturers and suppliers in China, specialized in providing high quality products and service. If you're going to buy customized outdoor mv vacuum circuit breaker, welcome to get more information from our factory.
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