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KYN28A-12 Metal Enclosed Switchgear - High-Quality China Suppliers & Factory for 3.6-12kV Distribution Solutions
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KYN28-12 Armoured Middle-Mounted Metal Enclosed Switchgear.jpg

KYN28A-12 Metal Enclosed Switchgear - High-Quality China Suppliers & Factory for 3.6-12kV Distribution Solutions

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The KYN28A-12 (GZS1-1is an advanced indoor AC metal-clad switchgear designed for voltages ranging from 3.6-12kV and a frequency of 50Hz. Manufactured in China, this middle-mounted solution is ideal for single busbar segmented systems, making it an excellent choice for power plants, industrial facilities, substations, and large motor control applications. As a leading product from top suppliers and factories, it adheres to GB, IEC, and DL standards, offering comprehensive safety interlocks for reliable control, protection, and monitoring.

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    Product Details

    📦 Product Model

    KYN28-12 Armoured Middle-Mounted Metal Enclosed Switchgear

    ⚙️ Technical Parameters

    Parameter Value

    Rated Voltage (kV)

    3/6/10

    Maximum Operating Voltage (kV)

    3.6/7.2/12

    Power Frequency Withstand Voltage (kV)

    42 (1min)

    Impulse Withstand Voltage (kV)

    75

    Rated Frequency

    50Hz

    Rated Current (A)

    630–3150

    Rated Thermal Stability Current (kA/4s)

    16–50

    Rated Dynamic Stability Current (kA)

    40–125

    Rated Short-Circuit Breaking Current (kA)

    16–50

    Rated Short-Circuit Making Current (kA)

    40–125

    Rated DC Voltage for Opening/Closing Switch and Auxiliary Circuits

    24, 30, 48, 60, 110, 220, AC 110, 220

    Protection Class

    IP4X
    △ Technical data for VSI and VD4 vacuum circuit breakers are shown in the table below:
    Items Unit VSI VD4

    Rated Voltage

    kV

    3.6

    6

    10

    Maximum Operating Voltage

    kV

    3

    7.2

    12

    Rated Insulation Level

    Power Frequency Withstand Voltage for 1 minute

    kV

    42

    Lightning Impulse Withstand Voltage

    kV

    75

    Rated Frequency

    Hz

    50

    Rated Current

    A

    630, 1250, 1600, 2000, 2500, 3150

    Rated Short-Circuit Breaking Current (RMS)

    kA

    16, 20, 25, 31.5, 40, 50

    4S Thermal Stability Current (RMS)

    kA

    16, 20, 25, 31.5, 40, 50

    Rated Dynamic Stability Current (Peak)

    kA

    40, 50, 63, 80, 100, 125

    Transient Recovery Voltage Rate

    kV/ms

    0.345

    0.415

    Peak Transient Recovery Voltage

    kV

    20.6

    30

    Rated Operation Sequence

     

    Split - 0.3 seconds - Merge - 180 seconds - Merge

    Automatic Reclosing Operation Sequence

     

    Split - 0.3 seconds - Merge split - 3 minutes - Merge split

    Multiple Reclosing Operation Sequence

     

    Split - 0.3 seconds - Merge - 15 seconds - Merge - 15 seconds - Merge

    Closing Time

    ms

    100

    70

    Opening Time

    ms

    20

    45

    Arcing Time

    ms

    15

    15

    Breaking Time

    ms

    65

    60

    🔧 The Schematic Diagram of the Switchgear Structure

    Compartments
    • A. Busbar Compartment
    • B. Circuit Breaker Trolley Compartment
    • C. Cable Compartment
    • D. Relay and Instrument Compartment
    Components
    • 1.1 Pressure Relief Device
    • 1.2 Control Cable Tray
    • 1. Enclosure
    • 2. Branch Busbar
    • 3. Busbar Sleeve
    • 4. Main Busbar
    • 5. Static Contact Device
    • 6. Static Contact Box
    • 7. Current Transformer
    • 8. Grounding Switch
    • 9. Cable
    • 10. Surge Arrester
    • 11. Grounding Main Busbar
    • 12. Removable Partition
    • 13. Partition (Live Door)
    • 14. Secondary Plug
    • 15. Circuit Breaker Trolley
    • 16. Heating Device
    • 17. Withdrawable Horizontal Partition
    • 18. Grounding Switch Operating Mechanism
    • 19. Base Plate
    KYN28-12 Switchgear Structure Schematic Diagram

    📐 The Outline Dimensions of the Switchgear

    * For Rated Currents Exceeding 1600A, the Dimension is 1000mm; for Others, it is 800mm
    ** Cable Inlet and Outlet Dimensions: 1500mm for Overhead Lines and 1660mm for Overhead Lines
    KYN28-12 Switchgear Outline Dimensions

    🏗️ Switchgear Base Installation Diagram

    Cabinet Width Cabinet Depth M N L

    800

    1500 Cable

    630

    800

    1450

    1660 Overhead

    1610

    1000

    1500 Cable

    830

    1000

    1450

    1660 Overhead

    1610
    KYN28-12 Switchgear Base Installation Diagram

    📏 Switchgear Installation Dimension Diagram

    Cabinet Width Cabinet Depth L1 L2 L3

    800

    1500 Cable

    530

    630

    800

    1660 Overhead

    1000

    1500 Cable

    730

    830

    1040

    1660 Overhead
    KYN28-12 Switchgear Installation Dimension Diagram

    📏 Switchgear Installation Dimension Diagram

    Cabinet Depth L

    1500

    1450

    1660

    1610
    KYN28-12 Switchgear Installation Dimension Diagram 2

    ❓ Frequently Asked Questions (FAQ)

    Q What is the rated voltage range of the KYN28-12 Armoured Metal Enclosed Switchgear?
    The KYN28-12 switchgear supports rated voltages of 3kV, 6kV, and 10kV, with maximum operating voltages of 3.6kV, 7.2kV, and 12kV respectively, making it suitable for a wide range of medium-voltage distribution applications.
    Q What types of vacuum circuit breakers are compatible with the KYN28-12 switchgear?
    The KYN28-12 switchgear is compatible with both VSI and VD4 vacuum circuit breakers. Both types support rated currents from 630A to 3150A and short-circuit breaking currents from 16kA to 50kA.
    Q What is the protection class of the KYN28-12 switchgear enclosure?
    The KYN28-12 switchgear enclosure meets IP4X protection class, providing effective protection against solid particles and ensuring safe operation in typical indoor substation environments.
    Q What cabinet width options are available for the KYN28-12 switchgear?
    The KYN28-12 switchgear is available in two cabinet width options: 800mm (for rated currents up to 1600A) and 1000mm (for rated currents exceeding 1600A). Both widths are available with cabinet depths of 1500mm (cable) or 1660mm (overhead).
    Q What are the main functional compartments of the KYN28-12 switchgear?
    The KYN28-12 switchgear consists of four main compartments: the Busbar Compartment (A), Circuit Breaker Trolley Compartment (B), Cable Compartment (C), and Relay & Instrument Compartment (D), ensuring safe isolation between functional zones.
    Q What auxiliary control voltages are supported by the KYN28-12 switchgear?
    The KYN28-12 switchgear supports a wide range of auxiliary DC and AC control voltages for opening/closing operations, including DC 24V, 30V, 48V, 60V, 110V, 220V, and AC 110V and 220V, offering flexibility for different substation control systems.