China Fuse load break switch Manufacturers, Suppliers, Factory

The FZN25-12D type vacuum load break switch and FZRN25-12D type combination appliance adopt a overall structure where the operating mechanism is arranged on the side of the main circuit (available in right or left side arrangement according to user's needs). The main conducting part consists of insulation cover, static contact, movable contact, conductive cylinder, and vacuum arc chamber. The combination appliance also includes a current-limiting fuse. This product uses the TF351 type vacuum arc-extinguishing chamber with a ceramic outer casing and 25 copper contacts. It features a flat contact structure, which results in minimal electrical wear and a long service life. With high breaking and closing capabilities, it offers strong performance and easy operation and maintenance. The fused switch is integrated with the operating mechanism, combining the functions of an isolating switch, load switch, and grounding switch into one compact structure. It has a small size, convenient installation, and flexible operation. The switch is equipped with a dynamic isolated contact and a vacuum arc-extinguishing chamber, which are arranged in series and linked according to the specified operating procedure, achieving a one-time operation. The cone-shaped static contact, insulation cover, and movable contact structure separate the busbar and load switch units, ensuring the personal safety of workers. When the grounding switch is closed, the movable contact automatically isolates the breaking point, providing excellent protection. The switch, grounding switch, movable contact, and cabinet door light are strictly in accordance with the "five preventions" mechanical interlocking to prevent misoperation. The switch mechanism is a spring-stored energy type, featuring both manual and electric energy storage functions. Once energy storage is complete (with the spring at the midpoint), it will automatically close, and for opening, it can be done manually with a decoupling lever or by an electromagnetic coil. This facilitates the implementation of remote control requirements for switch opening and closing operations. The switch can be powered by both AC and DC sources, and its working principle is similar to that of a circuit breaker. It is generally equipped with a simple arc extinguishing device, but its structure is relatively simple. The diagram shows a type of compressed air high-voltage load break switch. During breaking, under the action of the opening spring, the main shaft rotates clockwise. On one hand, the piston moves upward by compressing the gas through the crank-slider mechanism; on the other hand, the transmission system composed of two sets of four-link mechanisms opens the main contact first, and then the arc extinguishing contacts, blowing out the arc with the compressed air from the nozzle. When closing, the main contact and arc extinguishing contacts rotate clockwise at the same time under the action of the main shaft and the transmission system, with the arc contacts closing first and then the main contacts closing subsequently. During closing, the opening spring is also storing energy. As the load break switch cannot interrupt short-circuit currents, it is often used in combination with a current-limiting high-voltage fuse to not only complete the function of breaking the circuit but also reduce the thermal and mechanical forces caused by short-circuit currents.

The ZW7-40.5 series outdoor high voltage power station vacuum circuit breaker is a three-phase AC 50Hz outdoor high voltage switch device. It is designed for control and protection in 35kV transmission systems and can also be used in applications such as contactors and capacitor bank switching. This vacuum circuit breaker is primarily used for control and protection in outdoor 35kV power transmission and transformation systems. It is also suitable for normal operation and short-circuit protection in urban and rural distribution networks and industrial and mining enterprises. The overall structure of this product is a porcelain bottle pillar type, with a vacuum arc extinguishing system inside the upper porcelain bottle and a pillar porcelain bottle at the bottom. It is suitable for frequent operation environments. The ZW7-40.5 vacuum circuit breaker with electromagnetic operating mechanism offers various features, including excellent sealing, resistance to aging and high voltage, non-combustibility, and non-explosiveness. It has a long service life and is easy to install and maintain. With its reliable performance, this vacuum circuit breaker ensures efficient control and protection for power systems. Its porcelain bottle pillar structure provides enhanced durability and stability, making it ideal for frequent operation scenarios. The excellent sealing properties prevent any intrusion of external elements, ensuring reliable operation in various environmental conditions. Equipped with an electromagnetic operating mechanism, this circuit breaker enables smooth and precise switching operations. The electromagnetic mechanism delivers swift and efficient opening and closing actions, ensuring optimal control and protection in high voltage applications. The ZW7-40.5 vacuum circuit breaker is designed to meet the stringent requirements of 35kV power transmission systems. It is capable of withstanding high voltage levels and offers long-lasting performance without the risk of combustion or explosions. Its extended lifespan reduces the need for frequent replacement, minimizing maintenance costs and downtime. Installation and maintenance of this circuit breaker are straightforward, thanks to its user-friendly design. The convenient access points and simplified procedures ensure easy installation, inspection, and servicing, contributing to operational efficiency. In conclusion, the ZW7-40.5 series outdoor high voltage power station vacuum circuit breaker with electromagnetic operating mechanism provides reliable and efficient control and protection for power systems. Its robust construction, excellent sealing properties, and resistance to high voltage and aging make it a durable and safe choice for various applications. With its user-friendly design and long service life, it ensures hassle-free installation, operation, and maintenance.

The LW3-12 SF6 outdoor 3 pole mounted vacuum circuit breaker is a new generation product developed by our company in accordance with the new requirements of the State Grid Corporation of China for the integration of primary and secondary systems. The switch configuration fully complies with the requirements of the State Grid for the integration of primary and secondary systems. With its compact design structure, rational layout, and comprehensive functionality, this circuit breaker meets all the specified criteria for the integration of primary and secondary systems by the State Grid. One of the key features of this circuit breaker is its use of unified-parameter protection current transformers (CT), zero-sequence current transformers (ZCT), and zero-sequence voltage sensors. These components offer a wide measurement range, high measurement accuracy, and exceptional reliability. With complete analog quantities, this circuit breaker enables accurate diagnosis of various faults on power lines. The LW3-12 SF6 outdoor 3 pole mounted vacuum circuit breaker is meticulously designed to ensure optimal performance and reliable operation. It guarantees the effective integration of primary and secondary systems, providing a secure and stable solution for power distribution networks. Key Features: Integrated Primary and Secondary Systems: The switch configuration complies with the requirements of the State Grid for the integration of primary and secondary systems. This ensures seamless compatibility and smooth operation within the power distribution network. Compact Design and Rational Layout: The circuit breaker is engineered with a compact design structure and a rational layout, optimizing the use of space and facilitating installation and maintenance processes. Comprehensive Functionality: With its comprehensive functionality, the LW3-12 SF6 outdoor circuit breaker meets all the specified criteria for the integration of primary and secondary systems by the State Grid. It effectively protects power lines against various faults, ensuring the stability and reliability of the power distribution network. Unified-Parameter Protection CT, ZCT, and Zero-Sequence Voltage Sensors: These components offer a wide measurement range, high measurement accuracy, and exceptional reliability. They enable accurate fault diagnosis on power lines, ensuring quick and effective response to any detected abnormalities. In conclusion, the LW3-12 SF6 outdoor 3 pole mounted vacuum circuit breaker is a cutting-edge product that meets the requirements of the State Grid for the integration of primary and secondary systems. Its compact design, rational layout, comprehensive functionality, and use of unified-parameter protection components make it a reliable and efficient solution for power distribution networks.

It can be processed according to the drawings and samples, receive oem orders, accept wholesale and customization. Provide a complete set of motor protection system solutions. Voltage Parameter：3kv Power(kW) Size：2500kw Body Size：Customized

JP Integrated Distribution Cabinet(Including incoming and outgoing circuit, metering, reactive power compensation, remote terminal acquisition and control) General Description: An outdoor complete set of power distribution unit of three-phase AC 50/60Hz and rated voltage of 400V, is applicable to urban and rural power grids, used for control, compensation and metering of output of transformer of 10KV to transformer. It realizes load control, meter reading, remote maintenance, anti-electricity theft alarm, payment control of electric charge and other functions to circuit, there is air circuit breaker that is used for breaking loads in the switch chamber; Relative compensation chamber is equipped with muti-stage dynamic relative power compensation device that is of surge-free and long service life, Automated control,  convenient for installation, it cuts down the investment, . This outdoor switchboard complies with the standards GB/1.1-2005, GB/15576-2008 .IEC439and so on.

TBBZ High Voltage Switchgear Automatic Compensation Device is an advanced power system equipment designed to improve the stability and reliability of high voltage switchgear. The device's primary function is to monitor and regulate power voltage and power factor in real-time, ensuring optimal performance of high voltage switchgear and safe operation of the power system. The following article will discuss the features, working principles, and benefits of the TBBZ High Voltage Switchgear Automatic Compensation Device. Features: The TBBZ High Voltage Switchgear Automatic Compensation Device is designed with several advanced features that significantly improve the functionality of high voltage switchgear. The device is capable of precise power voltage and power factor regulation and comes equipped with advanced measuring and control technologies. It is also built with intelligent protection systems that prevent device failure and protect the system from overloads, short circuits, and other electrical hazards. Working Principles: The TBBZ High Voltage Switchgear Automatic Compensation Device operates on the principle of reactive power compensation. It measures the power factor and voltage of the electrical system using a digital controller and adjusts the capacitance or inductance of the device accordingly. By doing so, the device efficiently mitigates power loss and regulates the power factor, improving the stability and reliability of high voltage switchgear. Benefits: The TBBZ High Voltage Switchgear Automatic Compensation Device offers several benefits to power system operators. It enhances the system's performance, improves voltage regulation, increases energy savings, reduces power loss, and mitigates power surges, preventing equipment damage. It also improves the lifespan of high voltage switchgear and reduces maintenance requirements, making it a highly cost-effective and practical power system equipment. Overall, the TBBZ High Voltage Switchgear Automatic Compensation Device is a highly advanced and reliable system equipment that can significantly improve the stability and performance of high voltage switchgear systems. Its advanced features, precise control, and intelligent protection systems make it a highly desirable asset for power system operators, enabling them to efficiently regulate power voltage and power factor, mitigate power loss, and improve the lifespan of high voltage switchgear.