High-voltage switch cabinets are core equipment in power distribution systems, responsible for energy reception and distribution. They can switch power equipment and lines as needed, or quickly isolate faulty sections to protect grid safety and personnel security. Stable operation of high-voltage switchgear is critical to modern power systems.
As an ISO 9001 certified manufacturer, Zhejiang Lvma Electric Co., Ltd. (LVMA) leverages 17 years of production expertise to supply reliable high-voltage switchgear solutions, including mainstream models like KYN28, to customers worldwide.
Classification of High-Voltage Switchgear
1. By Structure Type
Armored: Compartments separated by grounded metal plates, represented by KYN28 series and KGN types.
Compartmentalized: Separated by non-metallic plates, typical model JYN.
Enclosed: Metal-enclosed with fewer compartments, typical model XGN.
2. By Circuit Breaker Placement
Floor-standing: Breaker unit installed on the floor and pushed into the cabinet.
Mid-mounted: Handcart located in the middle; widely used in kyn28 12 and other mainstream models.
3. By Insulation Type
Air-insulated metal-enclosed switchgear
SF6 gas-insulated metal-enclosed switchgear (gas-filled cabinet)These designs are widely applied in 34.5 kv switchgear and other medium voltage solutions.
Structure of KYN28 High-Voltage Switchgear
KYN28 switchgear consists of a fixed cabinet and removable handcart components, with high safety and interchangeability.
1. Cabinet Body
Made of aluminized zinc steel plate with assembled structure, featuring high strength, corrosion resistance and consistent dimensions. The cabinet is divided into four grounded compartments:
A. Busbar Chamber
Located at the upper rear, used for three-phase high-voltage busbars and branch connections. Busbars are insulated and supported to limit fault arc spread, a key advantage of kyn28 12.
B. Drawer (Breaker) Chamber
Equipped with rails for the circuit breaker handcart to move between working and test positions. Automatic shutters improve operator safety, a standard design in KYN28.
C. Cable Room
Accommodates current transformers, grounding switches, surge arresters and cables. The bottom has detachable plates for easy on site construction, widely used in 34.5 kv switchgear projects.
D. Relay Instrument Room
Installed with microcomputer protection devices, operation handles, instruments, indicator lights, terminal blocks and control power switches, supporting intelligent operation and monitoring.
Conclusion
Understanding the classification and internal structure helps users select the most suitable power distribution equipment. KYN28, kyn28 12 and 34.5 kv switchgear are widely recognized for their reliability and safety.
Adhering to strict quality and safety standards, LVMA focuses on delivering high-performance electrical products to global markets including Europe, the Middle East and South America, providing stable and professional power solutions for various industries.