KYN28A-24 Armored Removable AC Metal-Enclosed Switchgear from China Suppliers and Factory for Reliable Power Distribution

Model and Definitions

Application Conditions

• Ambient Air Temperature: Maximum temperature 40℃, minimum temperature -15℃;
• Relative Humidity: Daily average not exceeding 95%, daily average vapor pressure not exceeding 2.2 kPa; monthly average not exceeding 90%, monthly average vapor pressure not exceeding 1.8 kPa;
• Altitude: 1000m and below;
• Seismic Intensity: Not exceeding 8 degrees;
• Surrounding air should not be significantly polluted by corrosive or flammable gases, water vapor, etc.;
• No frequent severe vibration in the area;
• If used under conditions exceeding the normal environmental conditions specified in GB3906, it should be negotiated between the user and the manufacturer.

Technical Specifications

Structural Features of Products

• Structure of the Switchgear (see Figure 1).
• Fully metal armored, modular structure with a wide range of combination schemes.
• The cabinet body is made of imported aluminum-zinc coated thin steel plate, processed by machine tools, using advanced multiple folding techniques, connected with pull-riveted nuts and high-strength bolts, ensuring high precision, lightweight, high strength, and strong parts interchangeability.
• Compatible with VS1-24 series or imported VD4 series vacuum circuit breakers, offering wide applicability, high reliability, and long-term maintenance-free operation.
• The truck has operational and testing positions, with positioning and display devices at each location, ensuring safety and reliability.
• Various trucks change according to modular block design, ensuring that trucks of the same specification can be freely interchanged, while trucks of different specifications cannot enter.
• Grounding switch installation methods: Installed in the middle of the cabinet (front-mounted) to facilitate maintenance from the back of the cabinet with dual-sided access. Installed at the back of the cabinet (rear-mounted) to save space against the wall.
• Current transformer installation method: Installed in the rear cable room of the cabinet. Suspended from the bottom of the large bending plate.
• The cable room can accommodate up to 9 single-core cables.
• Each high-voltage chamber is equipped with a pressure relief channel to ensure personnel safety.
• Highly reliable interlocking device that fully meets the "Five Prevention" safety requirements.
• The hand truck is transported by a dedicated transport vehicle, making operation easy and flexible.
• The front and back doors are equipped with observation windows, allowing for easy monitoring of the working status of the internal components.

External Dimensions of Switchgear

Product Features

• Main circuit schematic diagram number, purpose, and single line system diagram, Nominal Voltage, Rated Current, Rated Short-circuit Breaking Current, layout of the distribution room, and arrangement configuration diagram of the switchgear, etc.
• Requirements for control, measurement, and protection functions of the switchgear, as well as other interlocking and automatic device requirements.
• Model, specifications, and quantity of the main electrical components inside the switchgear.
• If bus bridges are needed to connect between switchgear or incoming cabinets, provide specific requirements such as the rated current capacity of the bus bridge, span, height from the ground, etc.
• If the switchgear is used in special environmental conditions, details should be specified at the time of ordering.
• Other special requirements.