Yunfeng Technology Shares the Classification of High-Voltage Complete Equipment

The role of Yunfeng Technology's indoor AC high-voltage vacuum circuit breaker

03 Feb,2024

The YFZN (ZN)-24 series indoor AC high-voltage vacuum circuit breaker from Yunfeng Technology is designed for use in 50Hz AC networks with a rated voltage of 24kV. Compliant with the GB1984-2003 standard, this vacuum circuit breaker features a clearly visible isolation gap, making it suitable as both an independent electrical unit and a critical component in power systems—capable of interrupting load currents, overload currents, and short-circuit currents. The distinct isolation gap ensures enhanced safety for maintenance personnel working on high-voltage grids. This product is particularly well-suited for environments where oil-free operation, minimal maintenance, and frequent switching cycles are essential requirements. Yunfeng Technology is a leading domestic manufacturer of 12kV indoor AC high-voltage load switches. As a member of the High-Voltage Switchgear Branch of the China Electrical Equipment Industry Association, a member of the Jiangsu Provincial Electrical Industry Association, and a nationally recommended enterprise for urban and rural grid upgrades, Yunfeng Technology has also earned IS09001 quality management system certification. If you’re interested in Yunfeng’s products, please contact our dedicated customization hotline at 13806160307 or 0510-68976851.

Yunfeng Technology Shares the Classification of High-Voltage Complete Equipment

03 Feb,2024

Yunfeng Technology's high-voltage switchgear is primarily used for the control and protection of power systems—including users such as power plants, substations, transmission and distribution lines, and industrial and mining enterprises. These devices allow operators to either bring certain electrical equipment or lines into service—or take them out—based on grid operational needs. Additionally, in the event of a fault within the system, the faulty components can be swiftly isolated from the grid, ensuring uninterrupted operation of unaffected sections while safeguarding both equipment and personnel involved in maintenance and repairs. For this reason, high-voltage switchgear is an essential component of power transmission and distribution systems. Its safe and reliable operation plays a critical role in maintaining the overall security and efficiency of the power grid. Yunfeng Technology’s high-voltage switchgear can be categorized into two main types based on their functions and applications: 1. **Components and Component Combinations**: This includes individual circuit breakers, disconnect switches, earthing switches, reclosers, sectionalizers, load switches, contactors, fuses, as well as more complex assemblies like load switch-fuse combinations, F-C (contactor-fuse) units, isolating load switches, fuse-switch combinations, and open-type switchgear assemblies. 2. **Complete Switchgear Systems**: These systems integrate the aforementioned components and combinations with other essential electrical equipment—such as transformers, current transformers, voltage transformers, capacitors, reactors, surge arresters, busbars, incoming/outgoing line bushings, cable terminations, and secondary components—into a cohesive unit housed within a metal-enclosed enclosure. Such systems deliver fully functional, ready-to-use solutions, including metal-enclosed switchgear cabinets, gas-insulated switchgear (GIS), and prefabricated high- and low-voltage substations. Yunfeng Technology is a leading domestic manufacturer of 12kV indoor AC high-voltage load switches. The company is a member of the High-Voltage Switchgear Branch of the China Electrical Equipment Industry Association, a member of the Jiangsu Provincial Electrical Industry Association, and a nationally recommended enterprise for urban and rural grid upgrades. Yunfeng Technology has also achieved IS09001 quality management system certification. If you’re interested in Yunfeng Technology’s products, please contact our dedicated customization hotline at 13806160307 or 0510-68976851.

What are the functions of high-voltage circuit breakers? Yunfeng Technology is here to tell you.

03 Feb,2024

Yunfeng Technology’s high-voltage circuit breakers play a critical control role in high-voltage circuits, serving as one of the essential electrical components in this system. These breakers are designed to connect or disconnect circuits during normal operation, while also ensuring rapid circuit interruption under fault conditions, thanks to the coordinated action of relay protection devices. In special situations—such as automatic reclosing onto a faulty line—they reliably allow short-circuit currents to flow. High-voltage circuit breakers are specialized electrical devices engineered to open or close high-voltage circuits, whether under normal operating conditions or during faults. The breaker’s operational state—whether open or closed—is precisely controlled by its actuating mechanism. The primary functions of high-voltage circuit breakers include: (1) **Control Function**: Based on the operational requirements of the power system, these breakers enable the connection or disconnection of specific electrical equipment or entire sections of the power grid, allowing for flexible system management and operation. (2) **Protection Function**: When a fault occurs in a particular part of the power system, the circuit breaker, working in tandem with protective and automatic devices, swiftly isolates the faulty section from the rest of the system. This minimizes the scope of power outages, prevents the escalation of accidents, safeguards sensitive equipment from damage, and ensures the continued safe operation of unaffected areas within the system. Founded in 1990, our company spans an expansive site of 32,000 square meters, with a total building area of 26,000 square meters. Equipped with cutting-edge office facilities, advanced manufacturing and processing equipment, and comprehensive testing tools tailored to industry standards, we boast a dedicated team of professionals skilled in R&D, production, sales, and service. With over two decades of focused expertise in high-voltage electrical equipment manufacturing, we’ve cultivated a strong corporate culture and deep-rooted industry experience. If you’re interested in Yunfeng Electric’s products, please don’t hesitate to reach out to us via our custom hotline: 13806160307 or 0510-68976851.

Yunfeng Technology Analyzes the Installation of High-Voltage Isolating Switches

03 Feb,2024

Yunfeng Technology's pre-sales, in-sales, and after-sales service teams operate a rapid response mechanism, regularly reaching out to customers for follow-up visits and promptly addressing their needs with timely maintenance. High-voltage disconnect switches are critical switching devices in the electrical systems of power plants and substations, designed to be used in conjunction with high-voltage circuit breakers. Their primary function is to ensure safety during maintenance operations by isolating voltage—essentially acting as a physical barrier to prevent accidental contact with live components. However, these switches are **not** intended for interrupting or making load currents, nor are they suitable for breaking short-circuit currents. Instead, they can only handle certain switching tasks that don’t generate powerful arcs—meaning they lack arc-extinguishing capabilities. Depending on the installation location, high-voltage disconnect switches are classified into indoor and outdoor types. Based on the number of insulating pillars, they come in single-column, double-column, and three-column designs, with each voltage level offering a range of compatible equipment options. When installing outdoor high-voltage disconnect switches, ensure they remain horizontally positioned to allow the porcelain insulators with skirted bases to effectively repel rainwater. For indoor installations, the switch should be mounted vertically, with the stationary contact located at the top. If equipped with a bushing, it can be installed at a slight angle. In this setup, the stationary contact connects to the power source, while the movable contact is linked to the load. However, when installing high-voltage disconnect switches inside distribution cabinets and using cable connections, the power supply is typically routed through the sides of both the stationary and moving contacts. This installation method is also referred to as "reverse incoming current." Finally, it’s crucial to securely connect both sides of the high-voltage disconnect switch to the busbar and cable grounding system. When copper and aluminum conductors come into contact, always use specialized copper-aluminum transition connectors to prevent galvanic corrosion, which could compromise performance and longevity. Yunfeng Technology offers a comprehensive range of high-voltage load switches, including models such as the 12kV, 24kV, and 40.5kV versions. Our quality control team, comprising experts from the company’s technical department along with seasoned assembly professionals, rigorously inspects every product to guarantee uncompromising quality standards. If you’re interested in Yunfeng’s products, please reach out to our dedicated customization hotline at 13806160307 or call 0510-68976851.

What are the features of Yunfeng Technology's high-voltage complete equipment?

03 Feb,2024

The HXGN1-12 and HXGN10-12 series of indoor, box-type, AC enclosed ring network switchgear (hereinafter referred to as ring main units) are a new generation of high-voltage complete equipment products independently designed and developed by our company. They incorporate advanced foreign technologies while also meeting China’s specific power supply requirements, making them ideal for urban grid renovation and construction projects. After undergoing rigorous type tests and extensive long-term operational evaluations, these products have successfully achieved the performance standards outlined in IEC 298 "AC Metal-Enclosed Switchgear and Control Equipment" and GB 3906 "3-35 kV AC Metal-Enclosed Switchgear." Additionally, they feature reliable interlock mechanisms that comply with the stringent requirements of both standards, ensuring safe operation. With an IP3X-rated protection level, these ring main units boast several key advantages: compact size, lightweight design, simple operation, minimal operating force, clear visible disconnection points, enhanced safety, ease of maintenance, consistent reliability, and a small footprint. Notably, their core technical specifications now rival those of comparable international products.