KYN28-12 Metal-Clad HV Switchgear
The KYN28-12 is a 12kV armored, removable (withdrawable) AC metal-enclosed switchgear designed for primary distribution substations. Its four-compartment isolation structure and five-prevention interlocking mechanism deliver superior operational safety for power plants, industrial facilities and urban grid projects.
Product Specifications
Product Description
Product Overview
The KYN28-12 Metal-Clad Removable High-Voltage Switchgear is suitable for three-phase AC 50Hz/60Hz, 12kV power systems. It is primarily used for power plants, industrial and mining enterprises, public utility distribution substations, and high-voltage motor control systems. The switchgear features an armored layout, divided into independent functional compartments to maximize safety and limit damage in the event of an internal arc.
Key Features
- Metal-Clad Compartmentalized Construction: Fully enclosed by metal plates with dedicated pressure relief channels for the circuit breaker, busbar, cable, and instrument compartments.
- Removable Handcart Circuit Breaker: Utilizes highly reliable vacuum circuit breakers (such as VD4, VS1) mounted on a robust, smooth-rolling handcart.
- Five-Anti Mechanical Interlock: Integrates rigorous mechanical and electrical interlocks to prevent all common operator errors.
- Spacious Cable Connection Area: Roomy cable compartment accommodates multiple cable connections and surge arrestors, allowing easy bottom cable entry.
- Excellent Environmental Adaptation: High-quality Al-Zn coated steel sheets provide outstanding corrosion and oxidation resistance.
Technical Specifications
| Rated Voltage | 12 kV |
| Rated Frequency | 50 Hz / 60 Hz |
| Rated Current of Main Busbar | 630A to 4000A (Consult for specifications) |
| Rated Short-Time Withstand Current (Icw) | 20kA to 50kA for 4s |
| Rated Peak Withstand Current (Ipk) | 50kA to 125kA |
| Rated Power Frequency Withstand Voltage (1min) | 42 kV (phase to ground) |
| Rated Lightning Impulse Withstand Voltage (Peak) | 75 kV |
| Protection Level | IP4X (enclosure) / IP2X (between compartments) |
Applications
- Power reception, distribution, and control in high-voltage industrial plants.
- Power grid substations, municipal distribution grids, and residential feeder systems.
- High-voltage motor control and transformer protection applications.
Quality & Standards
Fully compliant with IEC 62271-200 and relevant high-voltage electrical safety standards. Built to ISO 9001 and ISO 14001 specifications to guarantee mechanical durability and reliable arc containment.
Need a customized switchgear configuration? Consult our engineering team for specifications.
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Contact Us
Apex Power Systems (Nanjing) Co., Ltd.
Contact us for product details, quotation, and project support.
- +8613201571341
- WhatsApp: +8613201571341
- xuke@link-jl.com
- Room 1001, Xinke Building, No. 209 Pubin Road, Jiangbei New Area, Nanjing City, Jiangsu Province, China

