KYN28-12 Metal Clad Switchgear: Technical Overview The KYN28-12 is a highly reliable and widely used metal-clad, indoor-type switchgear designed for medium-voltage power distribution systems. It operates at a rated voltage of 12 kV and complies with international standards such as IEC 62271-200 and GB 3906. This switchgear is engineered for safety, flexibility, and ease of maintenance, making it suitable for industrial plants, commercial buildings, and utility substations. Design and Construction The KYN28-12 features a modular, metal-clad structure with segregated compartments for enhanced safety. The main components include: 1. Circuit Breaker Compartment: Houses the vacuum circuit breaker (VCB), which ensures reliable interruption of fault currents up to 31.5 kA. The VCB is withdrawable, allowing for easy maintenance without de-energizing adjacent circuits. 2. Busbar Compartment: Contains the main and branch busbars, insulated to prevent short circuits. The design ensures minimal resistance and heat generation. 3. Cable Compartment: Located at the rear, it facilitates cable termination and includes grounding switches for safe maintenance. 4. Relay and Control Compartment: Equipped with protective relays, meters, and control devices for monitoring and automation. The switchgear’s robust steel enclosure provides IP4X protection against dust and mechanical impact, while the internal arc fault containment ensures operator safety. Key Features - Vacuum Interruption Technology: Ensures long service life and minimal maintenance. - Withdrawable Design: Enables quick replacement or inspection of breakers. - Interlocking Mechanisms: Mechanical and electrical interlocks prevent unsafe operations. - Flexible Configuration: Supports single or double busbar arrangements. - Communication Ready: Compatible with SCADA and smart grid systems for remote monitoring. Applications The KYN28-12 is ideal for: - Primary and secondary substations - Renewable energy integration (e.g., solar/wind farms) - Mining, oil & gas, and heavy industries Advantages - High short-circuit withstand capability (up to 31.5 kA). - Compact footprint, saving space in switchgear rooms. - Environmentally friendly (no SF₆ gas). In summary, the KYN28-12 combines advanced technology, safety, and adaptability, making it a preferred choice for modern medium-voltage power systems.