Principles and advantages of withdrawable switchgear
Publish Time: 2024-10-14
Principle and advantages of withdrawable switch cabinet
Principle
Drawable switch cabinet, also known as low-voltage withdrawable switch cabinet or drawer switch cabinet, is mainly based on manual or electric operation, so that the moving contact and the static contact of the contact mechanism are connected and disconnected respectively, so as to realize the connection and disconnection of the circuit. When the moving contact and the static contact are in contact, a certain contact resistance is formed between the two contacts, so that the current flows in the equipment, which plays the role of connecting the circuit; conversely, when the moving contact and the static contact are separated, the contact resistance between the contacts increases, and arc light and electric arc may be generated to achieve the purpose of power off.
The internal structure of the drawer switch cabinet is cleverly designed, and usually includes components such as circuit breakers, fuses, contactors, and overload protectors. Circuit breakers and fuses are used to protect circuit safety and cut off power when the circuit is overloaded or short-circuited; contactors are used to control the connection and disconnection of the circuit; overload protectors monitor the current in the circuit and cut off the power when the current exceeds the rated value to protect electrical equipment.
Advantages
Compact structure and multiple functional units:
The draw-out switch cabinet is compactly designed and can accommodate more functional units in a smaller space to meet a variety of power distribution and control needs.
The structure is highly versatile and flexible to assemble, and can be customized according to different environments and needs.
High technical performance:
The technical performance of the draw-out switch cabinet has reached the contemporary international level, with high breaking and connection capabilities, as well as good dynamic thermal stability.
The horizontal arrangement of the busbar enhances the dynamic and thermal stability of the device and can withstand large short-circuit current shocks.
Safe and reliable:
The separation between functional units and compartments is clear and reliable, ensuring that the failure of a unit will not affect the normal operation of other units.
Safety mechanisms such as overload protection and short-circuit protection are set to ensure equipment and personal safety.
Easy maintenance:
The drawer unit of the draw-out switch cabinet can be easily withdrawn and inserted, which is convenient for inspection and maintenance.
The internal structure is reasonably designed to facilitate the replacement and repair of electrical components.
Strong adaptability:
Drawout switchgear is suitable for various industries and places, such as power plants, petrochemicals, metallurgy, textiles, high-rise buildings, etc.
In large-scale places with a high degree of automation, the switchgear can be left with a computer interface for centralized control and management.
Save space:
Due to its compact design and multifunctional units, the drawout switchgear can greatly save floor space, especially for places with limited space.
Serialization and strong versatility:
Adopting standard module design, users can arbitrarily select and assemble different functional units according to their needs to meet different power distribution and control requirements.
In summary, the drawout switchgear has been widely used in power systems with its compact structure, diverse functions, high technical performance, safety and reliability, easy maintenance and strong adaptability.
