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In the global power distribution and transmission system, the outdoor vacuum circuit breaker (also known as the vacuum outdoor circuit breaker, outdoor circuit breaker) is an indispensable core electrical equipment. As a leading manufacturer of high and low voltage electrical equipment, Chuanli has been deeply engaged in the research and development, production, and sales of vacuum circuit breakers for many years, and its products are widely used in various outdoor power supply scenarios with excellent performance and reliable quality.
Understanding the core use and optimal installation position of disjoncteurs à vide extérieurs is crucial for building a safe, stable, and efficient power grid. Different outdoor distribution scenarios have different requirements for the voltage level, breaking capacity, environmental adaptability, and intelligent functions of electrical equipment. Chuanli outdoor vacuum circuit breaker has developed targeted technical solutions for various installation environments, perfectly matching the operation requirements of different links in the power grid.
In outdoor power distribution systems, the core use of disjoncteurs à vide extérieurs revolves around ensuring the safe and stable operation of the power grid, and it shows multi-dimensional functional value in the daily operation, fault handling, and long-term development of the power grid. As a mature and reliable switching device, the outdoor vacuum circuit breaker uses vacuum as the arc extinguishing medium, and its core use in outdoor installation scenarios is mainly reflected in the following four aspects:
In summary, the core use of the outdoor vacuum circuit breaker is not only to complete the basic switching function of the circuit, but also to act as the “protector” and “smart node” of the outdoor power grid, adapt to the harsh outdoor environment, and promote the intelligent and efficient development of the distribution system.
The outdoor vacuum circuit breaker is widely used in various outdoor distribution links due to its multi-functional advantages. Different installation positions correspond to different application requirements, and the selection of equipment models and technical parameters is also clearly targeted. The following is a detailed explanation of the main outdoor installation positions, installation reasons, and core functional requirements of the Chuanli outdoor vacuum circuit breaker:
The substation is the core hub of voltage transformation and distribution in the power grid, and the outdoor vacuum circuit breaker on the medium-voltage side is the key equipment for the protection of the feeder cabinet of the substation. Installation reason: Substations undertake the task of power transmission and distribution between different voltage levels. The load current of the medium-voltage circuit is large, and the fault risk is high. The outdoor vacuum circuit breaker can quickly interrupt the fault current and safely isolate the circuit, protecting the high-precision equipment,t such as transformers and current transformers in the substation.
The outdoor vacuum circuit breaker installed in the substation requires high opening capacity, high insulation performance, and intelligent linkage function, which can form a complete protection system with the company’s microcomputer protection device, so as to realize the precise and rapid treatment of substation feeder cabinet faults. At the same time, the modular design of the equipment facilitates maintenance and replacement in the limited space of the substation, reducing maintenance downtime by 50%.
The overhead distribution line is the main body of medium-voltage distribution in urban and rural outdoor areas, which has the characteristics of long distance, wide coverage, and many branch nodes. Reasons for installation: overhead lines are easily affected by natural factors such as lightning strikes, strong winds, and rainfall. It is difficult to locate the fault point, and installing disjoncteurs à vide extérieurs in the key section of overhead lines can realize the segmental protection of the lines. When a fault occurs in a certain section, only the fault section will be cut off, avoiding the entire line power outage and greatly improving the power supply reliability of the power grid.
Chuanli’s outdoor circuit breaker for overhead distribution lines is designed with a compact structure and windproof and waterproof performance as the core, adopts an IP65-level protection shell, can operate stably in a harsh outdoor environment, and supports SCADA remote control, realizes remote fault handling, and reduces the on-site operation workload of operation and maintenance personnel. The equipment is also equipped with lightning arresters to resist the impact of lightning overvoltage, further enhancing the fault-tolerant ability of overhead lines.
The power load of industrial parks and industrial enterprises is large, the outdoor distribution circuit is complex, and the continuity of power supply is extremely high. Reasons for installation: Industrial production and mining operations are highly dependent on power supply, and power outages will cause huge economic losses. The outdoor vacuum circuit breaker can quickly cut off the fault circuit of the industrial outdoor distribution system, and at the same time withstand the large current impact produced by the start-up and operation of industrial heavy equipment, ensuring the continuous and stable industrial power supply. In addition, the mine environment is dusty and humid, requiring outdoor circuit breakers to have excellent environmental adaptability and explosion-proof performance.
Chuanli’s outdoor vacuum circuit breaker for industrial and mining scenarios adopts a customized design with high fault tolerance and strong structure, coupled with high-voltage fuses to form a multi-level fault protection system, which can timely respond to all kinds of short-circuit faults in industrial circuits. Silicon-coated tubing with 70kV impact voltage can ensure reliable insulation in dusty and humid industrial environments, and modular accessories can be quickly maintained and replaced, meeting the needs of 24-hour continuous production in industrial enterprises.
The rural power distribution network has the characteristics of wide distribution, scattered users, complex outdoor terrain, and relatively backward original power distribution equipment. Reasons for installation: The original agricultural network has problems such as low equipment disconnection efficiency, poor environmental adaptability, and frequent power outages. The installation of disjoncteurs à vide extérieurs can realize the segment control and fault protection of the agricultural network, reduce the scope of power outages, shorten the time of power outages, and improve the reliability of power supply in rural areas. At the same time, the characteristics of easy installation and low maintenance cost are suitable for the actual situation of insufficient professional operation and maintenance personnel in rural areas.
Chuanli’s outdoor circuit breaker for rural distribution network adopts a plug-and-play design, which reduces the on-site installation time and difficulty, and is suitable for installation and debugging in rural mountains, hills, and other complex terrain. The compact structure of the equipment saves installation space, and the modular design reduces the cost of daily maintenance. In addition, it can be combined with the compact substation and photovoltaic transformer cabinet of Chuanli to form an integrated distribution scheme, support the connection of new energy such as rural photovoltaic, and promote the green development of the rural power grid.
With the rapid development of new energy industries such as photovoltaic and wind power and the continuous construction of smart grids, disjoncteurs à vide extérieurs have become an important supporting equipment for the connection of new energy and the operation of smart grids. Installation reason: New energy power generation has the characteristics of intermittent and unstable output, and the grid connection process has extremely high requirements for circuit switching and protection. The outdoor vacuum circuit breaker can realize the flexible on-off control of the new energy grid connection circuit and the rapid handling of grid connection faults, so as to ensure the safe and stable grid connection of new energy. In the smart grid system, as an intelligent sensing node, it collects operating data in real time, realizes remote control and linkage, and is the basis of smart grid dispatching management.
Chuanli’s outdoor vacuum circuit breaker for new energy and smart grid systems is equipped with high-precision IoT sensors and remote control functions compatible with SCADA, enabling real-time monitoring of equipment operation and remote fault detection. The equipment conforms to the international standard IEC 6231, adopts a modular and standardized design, is easy to seamlessly connect with new energy power generation equipment and smart grid control systems, can perfectly match the KYN28A12 series photovoltaic transformer cabinet, and provides reliable switching and protection for photovoltaic grid connection.
Rail transit (subway, high-speed rail), data centers require the reliability and continuity of outdoor power supply to the extreme, which is a typical scenario of high-grade power supply requirements. Installation reason: Rail transit is related to public travel safety, and data centers bear the task of storing and processing massive amounts of information. Even a short power outage will cause serious consequences. Disjoncteurs à vide pour l'extérieur are the key equipment for outdoor power supply circuit protection in rail transit and data centers, which can realize the rapid and non-delayed interruption of fault current to ensure the uninterrupted power supply of core loads. At the same time, the low noise and low loss characteristics of the equipment also meet the environmental requirements of urban rail transit and data centers.
Chuanli’s outdoor circuit breakers for rail transit and data centers are designed with high reliability and low noise as the core, coupled with dry-type transformers to achieve low noise operation (≤55dB), meeting the environmental noise requirements of urban areas; The equipment disconnection speed is less than 50ms, the rated short-circuit current is 25kA, and the fault circuit can be cut off in the shortest time to avoid the interruption of the core load power supply; The intelligent monitoring function can realize the predictive maintenance of the equipment, reduce the probability of sudden equipment failure, and ensure the stable and continuous operation of the rail transit and data center power supply system.
In order to facilitate an intuitive understanding of the installation location, core requirements, and supporting highlights of the Chuanli outdoor vacuum circuit breaker, the following summary table has been compiled to clearly present the key information of each installation scenario:
| Installation Location | Core Equipment Requirements | Chuanli Product Highlights |
| Sous-stations | High breaking capacity, intelligent linkage, and high insulation | 25kA short-circuit rating; equipped with microprocessor protection device; modular design. |
| Overhead Distribution Lines | Weatherproof, remote control, and lightning protection | IP65 protective enclosure; SCADA compatible; equipped with surge arrester; compact structure. |
| Industrial Parks/Mining Enterprises | High fault tolerance, dust and moisture resistance, multi-level protection | Equipped with high-voltage fuses, silicon-coated bushings, and 70kV impulse withstand voltage |
| Rural power distribution network | Plug and play, low maintenance, compact design | Pre-installed structure, compatible with compact substations/PV cabinets, easy installation |
| New Energy / Smart Grid | Intelligent monitoring, remote linkage, and standard compliance | IoT sensor (±0.5℃ accuracy), SCADA compatible, compliant with IEC 62271 standard |
| Rail Transit / Data Center | High reliability, fast disconnection, low noise | <50ms disconnection, ≤55dB low noise, predictive maintenance function |
ZW32- 12 series is a classic outdoor vacuum circuit breaker designed by Chuanli for 12kV medium-voltage distribution systems, which is the preferred product for most urban and rural overhead distribution lines, rural distribution networks, and small and medium-sized substations.Practical environment design: In response to the characteristics of the 12kV distribution network, which is widely distributed and has a harsh outdoor environment, this series adopts an IP65-level windproof and waterproof shell, which can operate stably within the temperature range of -40 ℃ to + 70 ℃, and is resistant to natural factors such as rain, snow, and dust; The compact and integrated structure saves installation space and adapts to the limited installation conditions of overhead line poles and rural distribution nodes.
With the upgrading of urban and industrial power grids, the 24kV voltage level is gradually becoming a new choice for medium-voltage distribution in some high-load areas such as industrial parks and central urban areas. The ZW32- 24 series outdoor vacuum circuit breaker is specially designed for 24kV distribution system. Design in line with the actual environment: In response to the characteristics of large 24kV power grid load and high power supply reliability requirements, On the basis of ZW32- 12, the series optimizes the structural strength and insulation performance, adopts reinforced silicon-coated tubing that can withstand higher impact voltage, and upgrades the shell to a more sealed structure to ensure the insulation reliability and structural stability of the equipment under high-load operation.
For large substations, ultra-high load industrial parks, new energy bases, and other high-voltage outdoor distribution scenarios, Chuanli has launched the ZW□-4 0.5 series intelligent high-voltage vacuum circuit breaker for outdoor use, which is suitable for 40.5 kV high-voltage distribution systems and is the core protection equipment for the outdoor high-voltage power grid. Practical design: In response to the high voltage, high current, and high intelligence requirements of the 40.5 kV power grid, this series adopts top-level insulation and structural design: silicon-coated bushing that can withstand 70 kV impact voltage, ensuring excellent insulation performance under high voltage; Heavy machinery structure supports isolation switch 100,000 mechanical operations, achieving long-term stable operation under high load; The fully sealed and explosion-proof shell is suitable for the harsh operating environment of large industrial parks and new energy bases.
| Tension nominale | Product Series | Main Applicable Installation Locations | Core Advantages |
| 12kV | ZW32-12 | Urban and rural overhead lines, rural distribution networks, and small substations | IP65 weatherproof, compact structure, low maintenance cost |
| 24kV | ZW32-24 | Industrial parks, urban core areas, and medium-sized substations | Reinforced insulation, high load adaptability, and fully remote control |
| 40.5kV | ZW□-40.5 | Large substations, ultra-high load industrial parks, and new energy bases | 70kV impulse withstand voltage, intelligent linkage, and ultra-fast fault protection |
With the continuous upgrading of the global power grid and the rapid development of the new energy industry, the application scenarios of disjoncteurs à vide extérieurs will become more diversified, and the requirements for equipment performance and intelligence will continue to rise. Chuanli Electric will continue to focus on research and development innovation, based on the actual needs of different outdoor installation environments, Upgrade and optimize product performance, develop more intelligent, high-performance, and strong environmental adaptability outdoor vacuum circuit breaker products, and provide more reliable technical support and equipment support for building a safe, stable, intelligent, and green outdoor distribution system.
Whether it is the transformation of the rural network, the upgrading of the urban network, or the connection of new energy, the outdoor vacuum circuit breaker of Chuanli has always been a reliable choice for the construction of the outdoor power grid.
Q1: What is the temperature range for stable operation of the Chuanli outdoor vacuum circuit breaker?
The outdoor vacuum circuit breaker equipped with an IP65-rated weatherproof shell and high-performance insulating components can operate stably in an extreme temperature range of -40 ℃ to + 70 ℃, adapts to the climatic characteristics of different regions, and meets the operating requirements of various outdoor environments.
Q2: What are the core performance advantages of the Chuanli outdoor vacuum circuit breaker in fault handling?
The core advantage is ultra-fast breaking + high breaking capacity. All series of Chuanli outdoor vacuum circuit breakers can achieve rapid breaking in less than 50ms, and the rated short-circuit breaking current is up to 25kA. At the same time, it can be matched with high-voltage fuses and microcomputer protection devices to form a multi-level, ultra-fast fault protection system, which can quickly cut off the fault current and prevent the fault from expanding.
Q3: Does the Chuanli outdoor vacuum circuit breaker support the smart upgrade of the power grid?
Support. All series of Chuanli outdoor vacuum circuit breakers are equipped with integrated IoT sensors + remote control function compatible with SCADA, The sensor can collect operating data such as temperature (accuracy ± 0.5 ℃) and current in real time, and the SCADA system can realize remote opening and closing, fault detection, and load management, which is the core equipment to support the intelligent upgrade of the power grid and can realize the predictive maintenance and remote coordinated operation of the power grid.
Q4: How long is the delivery time for the sample of Chuanli outdoor vacuum circuit breaker?
A: Standard sample (in stock) delivery time is 7-15 days; After the custom product is approved by DFM, the delivery time is 20-30 days.
Q5: How does Chuanli ensure the product quality of outdoor vacuum circuit breaker in harsh outdoor environment?
Answer: Chuanli ensures quality through full process quality control: 100% inspection of ISO certified supplier raw materials, high precision production process, finished products undergo high pressure, local discharge and environmental adaptability testing, in line with international and domestic standards.
