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        發布時間: 2021-09-02 11:14    



    Brief introduction to the products


    SVC Low-Voltage Reactive Power Automatic Compensation Device is mainly used for the reactive power compensation at the low-voltage side of the indoor and outdoor power transformer and is composed of condenser, filter reactor, contactor, combination switch, fuse, power factor automatic controller, main switch, ventilation system and cabinet. It plays an important part in improving the system voltage level, reducing the loss of the lines, improving the power factor of the system, improving the utilization ratio of the power transformer and enhancing the stability of the system voltage. It is characterized by its rapid and timely response, no power consumption operation and effectively suppressing the switching on surging current to improve the operation safety performance of the reactive power compensation device. The device also has the protection functions of over voltage, under voltage, over current, short circuit and lack-phase and can display three-phase voltage, current, active power, reactive power, power factor and control parameters, etc.. It is widely used in residential quarters, industrial and mining enterprises, hospitals, scientific research, coal and oil fields, petrochemistry and other public facilities, especially electric welder, spot welding machine, cranes and other high power industrial equipment which starts frequently.


    Standards for Product




    IEC-4931 Low Voltage Whole Set Switchgear and Controlgear

    GB7251 Low Voltage Whole Set Switchgear

    GB/T15576 General Technical Conditions of Low Voltage Reactive Power Steady Compensation Device


    Structural Characteristics and Function

















    High Compensation Precision

    The system power factor after compensation is higher than 0.98 ~ 0.99 (or the designed value).

    Rapid Response

    For 50Hz power grid, the system response time is less than 4 ms. The time for completion of a switching process is not more than 20 ms. Dynamic compensation should be achieved for the switching frequency depending on the change of power load (can up to 50 times/sec).

    Switching Pollution-free

    The group of silicon controlled adopts the imported silicon controlled chips, and the process of switching adopts the zero potential technology. The capacitor switching realizes the zero-crossing detection, zero voltage input and zero voltage switching. During the switching, there are no surge current, no voltage surge, and no high-order harmonics, with the safe and reliable operation and long service life to ensure the safety of power supply of the system.

    Three-Phase Asymmetric Compensation Functions:

    In case of the imbalance of the electrical load for users, quantitive input is made according to the actual needs of each phase to achieve the best compensation effect.

    Filter Circuit

    RC absorption circuit filters the high-order harmonics to realize the vibration without switching and dead zones without compensation.

    Fully Automatic Detection and Operation of Controller

    The controller has detection auto-tracking, over-voltage blocking, lack-phase protection, under voltage protection, short circuit of output terminal and line fault protection functions. When the system voltage is too high or too low, the controller will stop operation automatically. The trouble free operation time of the controller shall be not less than 12 years.

    Data Communication

    It has RS232/RS485 physical communication interface. The communication means can adopt on-the-spot data collection (point to point) or the remote data collection (network).

    Temperature Control Protection

    When the device temperature exceeds 40℃, the heat sink will automatically start to carry out mandatory ventilation.

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