KYN28A-12 High Voltage Switchgear Armoured Removable AC Metal Enclosed 12kV Rated Voltage

The KYN28A-12 is a premium, high-performance indoor switchgear designed for three-phase AC 50Hz power systems with a rated voltage of 12kV. This "Armoured Move-Open" switchgear is engineered based on advanced domestic and international manufacturing technologies, serving as a superior replacement for older models like KYN1-10 and JYN2-10.
It is widely used in power plants, substations, industrial and mining enterprises, and high-rise buildings for power reception and distribution. Its versatile design supports sophisticated control, protection, and monitoring for single busbar, single busbar segmented, and double busbar systems.

• Premium Material Construction: The enclosure is crafted from high-quality aluminum-zinc-deposited (Al-Zn) steel plates, assembled using precise bolt-fastening techniques after multiple precision bending by CNC machines. This ensures high corrosion resistance and exceptional mechanical strength.

• Fully Armoured & Safe Partitioning: The interior is divided into several independent compartments, including the VCB (Vacuum Circuit Breaker) room, Busbar room, Cable room, and Instrument room, each protected by metal partitions for maximum operator safety.

• Advanced Interlocking System: Features a comprehensive and reliable "Five-Prevention" interlocking mechanism, effectively preventing misoperation and ensuring the safety of personnel and equipment during maintenance.

• Flexible Removable Design: Equipped with a high-performance vacuum circuit breaker, the removable handcart design allows for easy maintenance, quick replacement, and high operational reliability.

• High Environmental Resilience: Designed to withstand harsh industrial conditions with an enclosure protection rating of IP4X (IP2X when the door is open), ensuring stable operation in various indoor environments.

• Ambient Temperature: -10°C to +40°C (Daily average ≤ 35°C).

• Altitude: ≤ 1000m (Special designs available for higher altitudes).

• Humidity: Daily average relative humidity ≤ 95%; Monthly average ≤ 90%.

• Seismic Intensity: ≤ Magnitude 8.

• Pollution Level: Suitable for environments without corrosive/flammable gases or obvious pollution.

1. Main circuit diagram and layout plan.

2. Specific models and quantities of auxiliary components.

3. Busbar specifications (material and current).

4. Required protection class and special environmental requirements.

5. Color requirements for the enclosure.

• Superior CNC-Fabricated Enclosure Our cabinets are constructed from premium Al-Zn (Aluminum-Zinc) coated steel, precisely processed by multi-stage CNC bending. This bolt-assembled design (rather than welding) provides exceptional mechanical strength and maximum resistance to corrosion, ensuring the structural integrity of your substation for decades.

• Failure-Proof "Five-Prevention" Interlock Safety is our non-negotiable priority. The KYN28A-12 features a high-reliability mechanical and electrical interlocking system. It strictly prevents:

  1. Moving the breaker handcart under load.

  2. Accidental entry into live compartments.

  3. Closing the breaker while the grounding switch is on.

  4. Energizing the grounding switch while live.

  5. Closing the grounding switch under load.

• Optimized Modular Partitioning The interior is intelligently partitioned into four independent metal-clad compartments: Busbar, VCB (Handcart), Cable, and Low-Voltage Instrument rooms. This compartmentalization contains any potential internal arc fault within a single area, protecting adjacent equipment and ensuring operator safety.

• High-Performance Vacuum Technology Equipped with our latest generation of high-reliability vacuum circuit breakers, the KYN28A-12 offers long electrical life and minimal maintenance. The removable handcart design allows for rapid replacement or testing, reducing downtime from hours to minutes.

• Adaptable for Smart Grids Ready for the digital age, our switchgear can be integrated with advanced microcomputer protection devices and smart sensors. It supports real-time monitoring of temperature, humidity, and electrical parameters, making it the perfect node for your Industrial 4.0 or Smart Grid infrastructure.

• Global Compliance & Extreme Testing Every unit undergoes rigorous Factory Acceptance Testing (FAT) in our modernized 2026-standard labs. Compliant with IEC 62271-200 and GB3906 standards, JNCN switchgear is engineered to perform in the world’s most demanding electrical environments.