⚡
Key Performance: Supports rated current switching of 630A and transfer current closing, with a short-circuit withstand current of 20kA/3s — delivering high reliability for demanding power distribution environments.
🛡️
Semi-Insulated Design
Busbars and high-voltage live components are encased in insulating materials, effectively reducing phase-to-phase and ground distances for a compact, safe structure.
🏗️
High-Quality Steel Cabinet
The cabinet is constructed from premium steel plates, ensuring structural robustness, long-term durability, and reliable performance in challenging environments.
⚙️
Flexible Switch Configuration
The core switch unit supports flexible configuration with load switches, load switch-fuse combinations, or vacuum circuit breakers to suit various application needs.
🔒
"Five-Prevention" Interlock
Comprehensive five-prevention interlock functions are built in as standard, ensuring operational safety and preventing misoperation during switching procedures.
🔋
630A Rated Current
Standard configurations support rated current switching of 630A and transfer current closing, meeting the demands of medium-voltage power distribution systems.
💥
20kA/3s Short-Circuit Withstand
Short-circuit withstand current reaches 20kA/3s, providing exceptional fault tolerance and protecting the system during abnormal electrical events.
❓ Frequently Asked Questions
Q
What is the semi-insulated design and why is it important?
The semi-insulated design means that busbars and certain high-voltage live components are encased in insulating materials. This reduces phase-to-phase and ground clearance distances, allowing for a more compact cabinet structure while maintaining electrical safety standards. It is particularly important in space-constrained installations where a smaller footprint is required without compromising safety.
Q
What switch unit configurations are available for this product?
The core switch unit can be flexibly configured with three options: a standard load switch, a load switch-fuse combination, or a vacuum circuit breaker. This flexibility allows the product to be tailored to specific application requirements, ranging from basic load control to advanced fault protection in medium-voltage distribution systems.
Q
What does the "five-prevention" interlock function mean?
The "five-prevention" interlock is a comprehensive safety mechanism commonly used in medium-voltage switchgear. It prevents five types of misoperations: operating the circuit breaker under load, pulling or inserting the handcart while it is live, grounding a live circuit, closing the grounding switch while the circuit is energized, and entering the live compartment without proper isolation. These interlocks work together to ensure safe and correct operation at all times.
Q
What is the rated current capacity of this switchgear?
The standard configuration supports a rated current switching capacity of 630A, along with transfer current closing capability. This makes it suitable for medium-voltage power distribution networks where reliable and efficient current management is essential for continuous operation.
Q
What is the short-circuit withstand current rating, and why does it matter?
The short-circuit withstand current rating is 20kA for a duration of 3 seconds. This rating indicates the maximum fault current the equipment can safely withstand without sustaining damage. A higher withstand rating means the switchgear can handle severe electrical faults, protecting both the equipment and the broader power system from catastrophic failure during short-circuit events.
Q
What are the advantages of using a high-quality steel plate cabinet?
The use of high-quality steel plates for the cabinet construction provides several key advantages: superior mechanical strength to withstand physical impacts, excellent resistance to corrosion and environmental factors, long service life with minimal maintenance, and reliable electromagnetic shielding. These properties ensure the switchgear remains robust and dependable throughout its operational lifespan in various industrial and utility environments.
