What is the structure of indoor high voltage load switch?

The structure of indoor high voltage load switch is designed to meet the requirements of safe and efficient control of power distribution in indoor environments. Its design features include a simple arc extinguishing device that is used to switch a certain load current and overload current, but cannot disconnect short-circuit current. This switch is usually used in series with a high voltage fuse to provide short-circuit protection. The structure and function of indoor high voltage load switches are as follows:‌

Basic structure: Indoor high voltage load switches usually consist of a fixed cabinet and a removable vacuum circuit breaker trolley. The cabinet is divided into several compartments, including the busbar compartment, circuit breaker compartment, cable compartment, and low-voltage compartment. This structure allows the various parts of the power system to be isolated from each other, improving safety.

Arc extinguishing device: Indoor high voltage load switches are equipped with simple arc extinguishing devices, which enable them to cut off the rated load current and a certain overload current, but are not sufficient to cut off the short-circuit current. The arc extinguishing device is designed to reduce the generation of arcs when the current is interrupted, thereby protecting the safety of equipment and operators.

Use with other equipment: Since indoor high voltage load switches cannot disconnect short-circuit currents, they are usually used in series with high-voltage fuses. When a short circuit occurs, the fuse will quickly cut off the circuit to protect the system and equipment from damage.

Application areas: Indoor high voltage load switches are widely used in three-phase AC 10KV, 50HZ power systems. They are suitable for industrial and mining enterprises, high-rise buildings and public facilities. As a ring network power supply or terminal, they play a role in the distribution, control and protection of electric energy.

In summary, the design of indoor high voltage load switch is to provide a safe and reliable power control system, cut off load current and overload current through a simple arc extinguishing device, and provide short-circuit protection by cooperating with high voltage fuses to ensure the stable operation of the power system.