KYN28A-12(Z) Electrical withdrawable AC metalclad switchgear

Product Overview

          The KYN28A-12(Z) is a high-performance 12kV AC metal-clad switchgear designed for power distribution systems. Featuring a withdrawable structure, it complies with GB 3906 and IEC 62271-200 standards. Ideal for substations, industrial plants, commercial buildings, and renewable energy facilities, it delivers exceptional reliability, safety, and intelligent control for power distribution, protection, and management.

          KYN28 metal-clad  switchgear (KYN28 enclosed metalclad  switchgear) is a complete power distribution device for 3.6~12kV,3-phase AC 50Hz,single-bus and single-bus sectionalized system. It is mainly used for power transmission of middle/small generators in power plants; power receiving, transmission for substations in power distribution and power system of factories, mines and enterprises, and starting of large high-voltage motor, etc.,so as to control, protect and monitor the system.

Key Specifications

Structural Features

Modular Design

Enclosure built with aluminum-zinc-coated steel plates for corrosion resistance and high strength (IP4X protection).

Internal compartments: Circuit Breaker Chamber, Busbar Chamber, Cable Chamber, Instrument Chamber—ensuring isolation and easy maintenance.

Withdrawable Circuit Breaker

Breaker equipped with a three-position (Connect/Test/Disconnect) trolley, supporting hot-swappable operation for maintenance without power shutdown.

Mechanical interlock system ensures compliance with "Five Protections" safety requirements.

Smart Configuration

Optional microprocessor-based protection relays and intelligent control units enable remote monitoring, fault diagnostics, and data integration.

SMC Insulation for contact boxes minimizes partial discharge and enhances dielectric performance.

Thermal Management & Safety

Natural convection cooling via top ventilation channels ensures temperature rise below national standards.

Spacious cable chamber accommodates single/multi-core cables, with standard voltage indicators and phase-checking devices.

Applications

Power Systems: Substation feeder control, busbar sectionalizing.

Industrial Facilities: Steel plants, chemical parks, mining operations.

Commercial Infrastructure: Data centers, hospitals, airports (primary distribution systems).

Renewable Energy: Photovoltaic power stations, wind farm step-up substations.

Key Advantages

✅ Enhanced Safety: Fully enclosed metal structure with multi-level interlocks to prevent misoperation.
✅ Extended Lifespan: Core components rated for 10,000 mechanical operations with long maintenance-free intervals.
✅ Scalable Design: Modular busbar system supports multi-cabinet configurations for complex grid demands.
✅ Eco-Friendly: Low-loss design aligns with green grid initiatives.

Code and implication 

Working environment

Ambient Temperature: -15℃～+40℃.

Altitude: Not above 3500 meters.(Altitude:4000M--3200M, pass IEC standards type test)

Relative Humidity: Daily average is not more than 95% and monthly average is not more than 90%;

The average daily vapour pressure is not more than 22KPA;

The average monthly vapor pressure is not more than 1.8KPA;

Seismic Intensity Scale: not more than 8 Liedu scale.

No obvious contamination with corrosive or combustible gases on site.  

Don’t be used on frequent intense vibration site.  

Note: When the working environment is out of the scope mentioned above, the user may consultant with us for the solution.   

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