How Is The 630A High Current-Carrying Capacity Achieved? Reveal How 25kV 25kV Load Switches Design Principles

In power system, load switches, as the key equipment, takes on the important task of closing, carrying, interrupting normal or overload currents. Especially in high voltage electric field with 25kV voltage voltage level, the design of load switches should not only meet the requirement of large current carrying capacity, but also ensure safe and stable operation under complex grid conditions. In this paper, the implementation of the 630A high current-carrying capacity switch will be deeply studied, revealing the design principle of 25kV load switches.
Achieve the 630A High Current-Carrying Capacity
1.Material Selection and Structural Design
The primary prerequisite for achieving a 630A high current-carrying capacity is the selection of materials with excellent electrical conductivity. Copper has good conductivity and mechanical properties and is the preferred material for manufacturing load switching conductive components. For example, high-purity copper materials are used in the design of contact points for load switches and conductive rods, and special processes such as silver plating are applied to further improve electrical conductivity and corrosion resistance.
In terms of structural design, load switches adopts modularized design method, which is convenient to combine and expand flexibly according to actual needs. For example, the CMW series 630A high-power connectors, developed independently by Tengfang Zhongke, has a compact modular installation design. This not only improves space utilization but also improves mechanical strength, ensuring stable connections even under harsh conditions such as high load and vibration.
2.Application of arc extinguishing technology
An arc occurs when a load switch interrupts the current. If not extinguished in time, serious damage will be done to the equipment. Therefore, arc extinguishing technology is key to realize the carrying capacity of large current. Common arc extinguishing methods are pneumatic arc extinguishing SF6 gas arc extinguishing and vacuum arc extinguishing.
Pneumatic Arc-Extinguishing: This method uses pistons to compress air and jets of compressed air to blow out arc. Simple structure, suitable for 35 kV and below.
SF6 Gas Arc-Extinguishing: SF6 gas has high insulation and arc extinguishing ability, which can achieve large current interruptions. Sulfur hexafluoride gas arc extinguishing has the advantages of strong current interruption capacity and excellent resistance, but the structure is relatively complex and suitable for high-voltage arc extinguishing.
Vacuum Arc-Extinguishing: In a vacuum, arc can quickly disperse ions and cause arc to be quickly extinguished. Vacuum arc extinguishing is characterized by long electrical life and low maintenance requirements. Widely used in 220kV and below voltage levels.
3.Heat Dissipation and temperature control
When strong currents pass through, the device generates a lot of heat. If it does not dissipate in time, it can lead to excessive temperature rises and affect performance and service life. Therefore, heat dissipation design is an important aspect to realize high carrying capacity.
Load switches employ a a a various heat dissipation measures, such as increasing heat sinks, optimizing air duct design and using materials with high thermal conductivity. For example, in PCB design, increasing the thickness of copper, widening trace widths and increasing heat dissipation of PCB can reduce temperature rise and ensure stable operation under high current.
Reveal how 25kV 25kV Load Switches Design Principles
1.Arc-Extinguishing Chamber Design
The arc chamber design is the core component of a 25kV load switch. The arc extinguishing chamber is made of special materials and has good insulating properties and arc extinguishing ability. air jets or SF6 gas may be used to blow out the arc extinguishing chamber during opening to prevent arc reignition and equipment damage.
2.Design of operational mechanisms
The design of operation mechanism of load switch directly influences the opening and closing speeds and reliability of switch. A 25kV load switch usually includes a spring-loaded mechanism that stores energy through an electric motor or manually to quickly open and close. The operating mechanism is also equipped with mechanical interlocking device to prevent misoperation and ensure the safety of the equipment.
3.Insulation and protection design
In high-voltage environments, insulation performance is the most important. A 25kV load switch uses high-strength insulating materials such as epoxy resin and silicone to ensure insulation performance in harsh environments. In addition, the equipment is equipped with comprehensive protective equipment such as rain covers and dust covers to prevent damage from external factors.
4.Intelligence and Remote Control
With the development of smart grid, the intelligent and remote control of load switches has become a trend. By integrating smart sensors and communication modules, a 25kV load switch can monitor device status in real time and be controlled remotely. This not only improves the operation efficiency of the equipment, but also improves the safety and reliability of the power grid.