Solid Dielectric Switches

First, the installation of 10 kV high-voltage disconnect switches must meet the following requirements. The first step is to select an appropriate installation location, typically near the switchgear power supply in the power system to facilitate operation and maintenance. At the same time, sufficient space must be ensured at the installation site to accommodate equipment placement and wiring.Secondly, equipment safety must be fully considered—for example, lightning protection and explosion-proo

The 145 kV disconnector is a critical switching device in substation electrical systems. It is used in conjunction with high-voltage circuit breakers and plays an important role in power grid operation:First, it isolates the power source, separating equipment under maintenance from the power system to ensure personnel and equipment safety;Second, it enables switching operations to change the system operating mode;Third, it is used to interrupt small-current circuits and bypass (loop) currents.Re

1. Operating Principle of the DisconnectorThe operating mechanism of the disconnector is connected to the active pole of the disconnector via a connecting tube. When the main shaft of the mechanism rotates 90°, it drives the insulating pillar of the active pole to rotate 90°. The bevel gears inside the base drive the insulating pillar on the other side to rotate in the opposite direction, thereby achieving opening and closing operations. The active pole, through inter-pole linkage tubes, drives

Selection Guidelines for 36 kV Disconnect SwitchesWhen selecting the rated voltage, ensure that the disconnect switch’s rated voltage is equal to or higher than the nominal voltage of the power system at the installation point. For example, in a typical 36 kV power network, the disconnect switch must have a rated voltage of at least 36 kV.For rated current, selection should be based on the actual long-term load current. Generally, the switch’s rated current must be no less than the maximum conti

The relationship between the temperature-rise current of a 145 kV disconnector and copper conductor size lies in balancing current-carrying capacity and heat dissipation efficiency. The temperature-rise current refers to the maximum continuous current a conductor can carry without exceeding its specified temperature rise limit, and the copper conductor size directly influences this parameter.Understanding this relationship begins with the physical properties of the conductor material. Copper’s c

Intelligentization has become an important development direction for power systems. As a critical component of the power system, the stability and safety of 10 kV distribution network lines are vital to the overall operation of the power grid. The fully enclosed disconnector, as one of the key devices in distribution networks, plays a significant role; thus, achieving its intelligent control and optimized design is of great importance for enhancing the performance of distribution lines.This pape

"Economy" remains paramount in power equipment procurement decisions. When it comes to Solid Insulated Ring Main Units (SIRMUs), the seemingly higher initial price often causes concern. However, a deeper analysis of their Life Cycle Cost (LCC) reveals a surprisingly compelling economic picture – it emerges as the wiser and ultimately more cost-effective choice.Initial Investment: A Misunderstood Starting PointAdmittedly, the purchase price of a SIRMU can be about 5%-15% higher than tra

Subject: Ultra-Low Temperature Self-Heating CT SolutionIn harsh extreme cold environments (e.g., Siberian oil/gas fields, Antarctic research stations), conventional GIS current transformers (CTs) face critical failures such as material embrittlement, drastic accuracy loss, and sealing failure. This solution is specifically engineered for operations below -60°C, integrating advanced material science, precision temperature control technology, and aerospace-grade sealing processes to ensure

BackgroundDuring urban power grid upgrades, limited land resources present a core challenge. Traditional GIS equipment occupies significant vertical space due to the separate structures of current transformers (CTs) and grounding switches, becoming a bottleneck in substation miniaturization design.Solution: Modular Integrated DesignThis solution innovatively deeply integrates CT functionality into the grounding switch operating mechanism, achieving spatial reuse and performance breakthroughs: Sp