Corrosion-Resistant Medium-Voltage Switchgear

KYN28-12 Corrosion-Resistant 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

• Enhanced Corrosion-Resistant Cabinet Construction
  The enclosure is manufactured using thickened aluminum-zinc coated steel sheets combined with a dual-layer epoxy electrostatic powder-coating process. With a coating thickness of ≥70 μm and verified performance through 500-hour neutral salt spray testing, the cabinet provides exceptional resistance to coastal salt mist, chemical acid and alkali vapors, and other corrosive environments. This ensures long-term durability without rusting, paint peeling, or structural degradation.

• Comprehensive Pollution-Resistant Insulation System
  Busbar supports, insulating bushings, and structural insulation components are all manufactured from V-0 rated flame-retardant and aging-resistant insulating materials. The system offers excellent resistance to electrical tracking, dust contamination, and environmental pollution, effectively preventing flashover and insulation breakdown in humid and heavily contaminated operating conditions.

• Upgraded Sealed Dustproof Protection
  The cabinet is equipped with reinforced rubber door gaskets and fire-resistant cable sealing compounds to enhance enclosure integrity. The upgraded IP44 protection rating effectively prevents the ingress of dust, moisture, and corrosive contaminants. In addition, a full-cabinet anti-condensation heating system is provided as standard to ensure reliable operation under high-humidity conditions.

• Reinforced Anti-Vibration Mechanical Structure
  The switchgear features a strengthened structural frame, reinforced operating mechanism springs, and stainless-steel locks and hinges. Designed to meet Seismic Intensity Level 8 requirements, it is well suited for mining operations, heavy industrial facilities, and other vibration-prone environments. The robust construction ensures smooth, reliable operation without sticking or mechanical failure, even under frequent switching conditions.

Technical Parameters