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MDmax® Low-Voltage Switchgear

The MDmax® low-voltage switchgear is available in two major series: MDmax ST and MDmax FC. It is a modular, multi-functional low-voltage switchgear that has undergone full type testing (referred to as TTA) and complies with GB 7251.12-2013 and IEC 61439-1 standards. Its electrical and mechanical design adopts a modular approach, leveraging standard components and modules to achieve compactness, diversity, and flexibility in cabinet configuration solutions.

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  • Product Description
  • Applicable Locations
  • Model Description
  • Terms of Use
  • Ordering Instructions
  • Technical Specifications
  • The MDmax® low-voltage switchgear is available in two major series: MDmax ST and MDmax FC. It is a modular, multi-functional low-voltage switchgear that has undergone full type testing (referred to as TTA) and complies with GB 7251.12-2013 and IEC 61439-1 standards. Its electrical and mechanical design adopts a modular approach, leveraging standard components and modules to achieve compactness, versatility, and flexibility in cabinet configuration.

  • Mdmax@ Low-voltage switchgear is electrical equipment suitable for indoor installation.

    Ambient temperature

    Short-term maximum temperature +40°C

    24-hour maximum average temperature +35°C

    Minimum temperature: -5°C

    When the equipment is operated at ambient temperatures higher than those specified above, it shall be derated.

    Environmental conditions

    During normal operation, the climatic conditions shall comply with the relevant provisions of GB 7251.12-2013 and IEC 61439-1; the relative humidity of the surrounding environment shall be 50% at 40°C.

    The installation location of the switchgear indoors shall comply with the requirements of the relevant standards. In environments where condensation is likely to occur, measures such as ventilation or heating shall be implemented inside the switchgear to prevent condensation. If the switchgear is installed at an altitude exceeding 2,000 meters, the equipment shall operate at a derated capacity accordingly.

  • Product model;

    Main circuit system diagram and arrangement diagram;

    Auxiliary electrical schematic;

    Other special requirements that are inconsistent with the product’s normal use;

  • Dimensions of the switchgear

    Recommended height 2200
    Recommended width
    Fixed structure
    Drawer-style structure
    400/600/800/1000/1200
    600
    Recommended depth
    Movable structure
    Standard unit height
    Plug-in structure
    600/800/1000/1200
    600/800/1000/1200
    600/800/1000/1200
    Standard unit height
    Drawer-style
    Portable
    Insert-type
    Standard installation module pitch
    200/300/400/600
    150/200/300
    150/200/300/400
    25

     

    Technical Data

    Standard
    Type-tested assembled switchgear (TTA)
    GB 7251.12-2013, IEC 61439-1
    Electrical Characteristics GB 7251.12-2013, IEC 61439-1
    Rated voltage
    Rated Insulation Voltage
    Rated operating voltage
    Rated impulse withstand voltage
    Overvoltage Level
    Pollution Level
    Rated operating frequency
    690 V/1000 V AC, 3P, 1500 V DC
    400V/690V AC, 3P, 750V DC
    6/8/12KV
    II/III/IV
    3
    Up to 60 Hz
    Rated current
    Main busbar rated current
    Main Rated Peak Withstand Current
    Rated short-time withstand current
    Up to 6300A
    Up to 220 kA
    Up to 100 kA
    Distribution busbar rated current
    Rated Peak Withstand Current
    Rated short-time withstand current
    Up to 2000 A
    Up to 176 kA
    Up to 80 kA

     

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