Cost-Effective Medium-Voltage Switchgear

KYN28-12 Cost-Effective Medium-Voltage Switchgear

KYN28-12 is a 12 kV indoor metal-clad withdrawable switchgear manufactured in accordance with GB 3906, GB/T 11022, and IEC 62271-200 standards. The enclosure is assembled using high-quality aluminum-zinc coated steel sheets and features a four-compartment segregated design, consisting of the busbar compartment, circuit breaker compartment, cable compartment, and instrument compartment.

The switchgear provides an enclosure protection rating of IP4X, with IP2X protection between internal compartments, and is equipped with a comprehensive five-prevention mechanical interlocking system as standard. Designed for use in power plants, substations, industrial and commercial facilities, real estate developments, and renewable energy projects, it is suitable for a wide range of 10 kV medium-voltage distribution systems.

Featuring a modular withdrawable truck design, switchgear units of the same specification offer 100% interchangeability, simplifying maintenance, spare parts management, and system expansion. As one of the most widely deployed and proven medium-voltage switchgear platforms in China, the KYN28-12 has become a benchmark solution for modern power distribution networks.

Advantages & Features

• Streamlined Standardized Configuration
  The enclosure is manufactured from national-standard aluminum-zinc coated steel sheets and assembled through CNC precision bending processes. By eliminating unnecessary customized structures, the design remains highly standardized and cost-efficient. The switchgear is equipped as standard with a high-quality domestically manufactured VS1 vacuum circuit breaker, while key components are produced through mature localized mass-production processes, resulting in lower procurement costs, shorter lead times, and outstanding value for large-scale projects.

• Interchangeable Withdrawable Truck Design
  Circuit breaker trucks, PT trucks, and isolation trucks share a standardized modular platform. Trucks with the same current rating are fully interchangeable, allowing faulty units to be quickly withdrawn and replaced without extensive maintenance work. This significantly reduces downtime, simplifies maintenance procedures, and lowers overall operating costs.

• Compact and Optimized Cabinet Dimensions
  The switchgear features standardized dimensions of 800 mm width × 1500 mm depth × 2300 mm height. Compared with customized narrow-width cabinet designs, the standardized structure offers greater maturity, reliability, and ease of installation while fitting most conventional electrical rooms and reducing civil construction and retrofit costs.

• Reliable Operation Across a Wide Temperature Range
  Designed for stable operation in ambient temperatures ranging from –15°C to +40°C, the switchgear performs reliably in typical indoor humid environments without requiring dedicated climate-controlled rooms. Equipped with a complete set of fundamental five-prevention safety interlocks, it fully complies with standard requirements for commercial and residential power distribution systems.

Technical Parameters