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SJKW1-ACB.jpg
SJKW1-ACB.jpg

Intelligent Universal Circuit Breaker SJKW1-2000 from China Suppliers | Factory Direct, Overload & Short-Circuit Protection

This Air Circuit Breaker is expertly designed for 50Hz AC distribution networks, accommodating voltages up to 690V and current ratings from 200A to 6300A. It offers comprehensive protection against overloads, short circuits, undervoltage, and ground faults, ensuring optimal safety and reliability. Its intelligent selective protection feature significantly enhances power reliability, making it a must-have for modern electrical systems. Open communication interfaces facilitate seamless remote control, perfect for integration with automation systems. Rated for altitudes up to 2000m and featuring an 8kV impulse withstand voltage, this versatile device also serves as an isolator without needing controllers. Combining precision protection with smart grid compatibility, this product is ideal for customers seeking reliable solutions from trusted China suppliers and factories
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    Product Details

    Type Designation
    SJKW1-2000-intelligent-universal-circuit-breaker-(2)
    ① Rated current in scope of frame size
    1600 type 200A, 400A, 630A, 800A, 1000A, 1250A, 1600A
    2000 type 630A, 800A, 1000A, 1250A, 1600A, 2000A
    3200 type 2000A, 2500A, 3200A
    4000 type 2500A, 3200A, 4000A
    6300 type 4000A, 5000A, 6300A
    ② Number of poles: 3 - default; 4 - 4 pole
    ③ Installation

    Fixed type — horizontal, vertical

    Drawout type — horizontal, vertical

    ④ Intelligent Controller

    M type

    2M type: Digital display, over-current protection (overload, short delay, instantaneous), 4P or 3P+N have earthing protection.

    3M type: LCD display, over-current protection (overload, short delay, instantaneous), 4P or 3P+N have earthing protection.

    H type

    2H type: Communication function, digital display, over-current protection (overload, short delay, instantaneous), 4P or 3P+N have earthing protection.

    3H type: Communication function, LCD display, over-current protection (overload, short delay, instantaneous), 4P or 3P+N have earthing protection.

    ⑤ Common Use Accessory

    Shunt release — AC220V/230V, AC380V/400V, DC220V, DC110V

    Undervoltage release — AC220V/230V, AC380V/400V; classified to instantaneous type and time-delay type.

    Closing electromagnet — AC220V/230V, AC380V/400V, DC220V, DC110V

    Motor-driven energy-storage mechanism — AC220V/230V, AC380V/400V, DC220V, DC110V

    Auxiliary contact — 4a4b, 2a6b, 3a3b  (Note: a = normal open, b = normal close)

    ⑥ Optional Accessory

    Mechanical interlock:

    One circuit breaker (1 lock + 1 key)

    Two circuit breakers (steel cable interlock, connecting rod interlock, 2 locks + 1 key)

    Three circuit breakers (3 locks + 2 keys, connecting rod interlock)

    Automatic power transfer system

    Current transformer connected with neutral lead

    Product Display
    SJKW1-ACB
    SJKW1-2000-intelligent-universal-circuit-breaker-(1)
    SJKW1-2000-intelligent-universal-circuit-breaker-(2)
    W1-ACB-intelligent-universal-circuit-breaker-(4)
    SJKW1-2000-intelligent-universal-circuit-breaker-(4)
    SJKW1-2000-intelligent-universal-circuit-breaker-(5)
    Technical Parameters
    Rated current of frame (Inm)   1600 2000 3200 4000 6300
    Ue (V) AC400V / AC690V AC400V / AC690V AC400V / AC690V AC400V / AC690V AC400V / AC690V
    Ui (V) 1000 1000 1000 1000 1000
    Rated Frequency (Hz) 50 Hz 50 Hz 50 Hz 50 Hz 50 Hz
    Rated ultimate short-circuit breaking capacity (Icu, kA) O-CO 400V 65 85 100 100 120
    690V 50 50 65 65 80
    Rated short-circuit making capacity nxIcu (kA) / cosφ 400V 143 176 / 0.2 220 / 0.2 220 / 0.2 264 / 0.2
    690V 105 105 / 0.25 143 / 0.2 143 / 0.2 187 / 0.2
    Rated service short-circuit breaking capacity (Ics, kA) O-CO-CO 400V 55 50 65 65 80
    690V 42 40 50 50 70
    Rated short-time withstand current Icw (kA) 1s, Time delay 0.4s, O-CO 400V 55 50 65 65 / 80 (MCR) 85 / 100 (MCR)
    690V 42 40 50 50 / 65 (MCR) 65 / 75 (MCR)
    Installation and Overall Dimensions
    Installation-and-Overall-Dimensions-1Installation-and-Overall-Dimensions-2
    Frequently Asked Questions
    Q What frame sizes are available for the SJKW1 Intelligent Universal Circuit Breaker?
    The SJKW1 series is available in five frame sizes: 1600, 2000, 3200, 4000, and 6300. Each frame size covers a specific range of rated currents, from 200A up to 6300A, to suit a wide variety of power distribution applications.
    Q What are the differences between the M type and H type intelligent controllers?
    The M type controllers (2M and 3M) provide digital or LCD display with over-current protection functions. The H type controllers (2H and 3H) include all M type features plus a built-in communication function, making them suitable for smart grid and remote monitoring applications.
    Q What installation methods does the SJKW1 circuit breaker support?
    The SJKW1 supports both fixed type and drawout type installation. Both types are available in horizontal and vertical orientations, providing flexible options for different switchgear cabinet configurations.
    Q What rated voltages does the SJKW1 series operate at?
    The SJKW1 series operates at rated voltages of AC400V and AC690V across all frame sizes. The rated insulation voltage (Ui) is 1000V. This makes it suitable for standard industrial and commercial power distribution systems.
    Q What optional accessories are available for the SJKW1 circuit breaker?
    Optional accessories include mechanical interlocks for one, two, or three circuit breakers (with various lock and key configurations), an automatic power transfer system, and a current transformer connected with a neutral lead. These accessories enhance safety and operational flexibility.
    Q What is the rated ultimate short-circuit breaking capacity (Icu) of the 6300 frame at 400V?
    The 6300 frame size achieves the highest rated ultimate short-circuit breaking capacity (Icu) of 120 kA at 400V, and 80 kA at 690V, making it suitable for high-demand industrial power distribution environments requiring robust fault protection.