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SJKQ2-ATS-Switch-(1).jpg
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SJKQ2 Dual Power Automatic Transfer Switch

The SJKQ2 ATS Automatic Transfer Switch delivers robust power transfer solutions for critical systems, supporting 100A-3200A loads at AC 400V with 500-800V insulation and 6-8kV impulse withstand. Engineered for harsh environments, this ATS operates at altitudes ≤2000m and temperatures -5°C to +40°C, featuring <3s switching and AC-33iB performance. With short-time withstand currents up to 16kA, it ensures reliability in Pollution Degree 3/Category Ⅲ installations. The SJKQ2 Automatic Transfer Switch prevents power interruptions with seamless source transition, making it ideal for industrial and commercial backup systems requiring fail-safe operation.

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    product details

    Type Designation

    SJKQ2-Dual-Power-Automatic-Transfer-Switch-4
    1 Manufacturer Code
    2 Auto-Transfer Function
    3 Dervatve Code: (): NCCB; W Compact Type; W1: Economy Type; W2: smart type (Undervoltage/Phase-Loss/Off/Fire Protection)
    4 Function Code: R-Grid-to-Grid (Optional); F-Grid-to-Generator; M-Terminal Type (Optional);
    Y-Integrated Smart Type (Off/Fire Protection/Undervoltage); N-Split Smart Type (Off/Fire Protection/Undervoltage)
    5 Frame Size Current
    6 Number of Poles
    7 Rated Current (In)

    Technical Parameters

    Rated current 100A 160A 250A 630A 1600A 3200A
    Rated voltage AC 400V
    Rated Insulation voltage (Ui) 500V 800V
    Rated Impulse withstand voltage (Uimp) 6KV 8KV
    Rated Short-time withstand current (Icw) 5KA 10KA 16KA
    Switch time <3s 5s
    Rated control voltage AC 230V
    Ambient Temperature The upper limit is +40°C, the average value does not exceed +35°C within 24 hours; the lower limit is -5°C.
    Altitude The altitude of the installation site does not exceed 2000m.
    Installation Environment No explosive atmosphere environment.No rain instrusion environment.
    Power Supply Voltage Deviation <85%Ue
    Using Category AC-33iB
    Installation Category II
    Pollution Degree 3

     product Display

    SJKQ2-Dual-Power-Automatic-Transfer-Switch-(1)
    SJKQ2-Dual-Power-Automatic-Transfer-Switch-(2)
    SJKQ2-Dual-Power-Automatic-Transfer-Switch-(3)

    Main Circuit Wiring Diagram & External Power ON Indicator

    SJKQ2-3

    1. Normal Neutral Line

    2. Normal Source ON Indicator

    3. Alternate Neutral Line

    4. Alternate Source ON Indicator

    Terminal Diagram

    If the user requires fire protection and power generation functions, please consult with the manufacturer for customization. The wiring diagram is as follows:

    SJKQ2-4

    Outline and Installation Dimensions

    SJKQ2-5

    Installation Dimensions

    SJKQ2Automatic Power Transfer Switch Installation Dimensions

    Model    Dimensions W W1 L L1 H
      SJKQ2-100/3P 290  253  205  186  120 
      SJKQ2-100/4P 320  282  205  186  120 
      SJKQ2-225/3P 330  296  215  195  140 
      SJKQ2-225/4P 365  333  215  195  140 
      SJKQ2-400/3P 465  410  310  285  190 
      SJKQ2-400/4P 508  455  310  285  190 
      SJKQ2-630/3P 528  478  318  295  195 
      SJKQ2-630/4P 588  535  318  295  195 
      SJKQ2-800/3P 608  556  334  310  190 
      SJKQ2-800/4P 678  626  334  310  190 
      SJKQ2-1250/4P 695  642  391  365  288 
      SJKQ2-1600/4P 695  642  391  365  288