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HHT10 Series Vertical Fuse Switch Disconnector - China Supplier & Factory for Power Distribution Solutions

The HHT10 series bar-type vertical fuse switch disconnectors, commonly referred to as switches, are engineered for use in AC power systems operating at 50/60Hz with rated voltages of up to AC400V, AC500V, and AC690V. With a maximum heating current capacity of 630A, these switches are ideal for infrequent circuit connection and disconnection, as well as for isolation in enterprise power distribution systems. Serving multiple functions, they act as power switches, disconnect switches, and emergency switches, providing essential circuit protection. However, they are not typically designed for direct switching of individual units and are particularly suited for electric motors, With a modern design, these fuse switch disconnectors are extensively utilized in applications such as cable branch boxes and American-style box transformers. Our product meets the stringent standards of GB/T14048.3 and IEC60947-3, ensuring reliability and safety in all installations, Current classifications available include 160A, 250A, 400A, and 630A. As a trusted China supplier and factory, we focus on delivering high-quality electrical solutions to meet diverse customer needs
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    Product Detail

    Meaning of Product Model

    HHT10 Series Bar-type Vertical Fuse Switch Disconnector

    Normal Working and Installation Conditions

    • The ambient air temperature shall not exceed +40℃ and not be lower than -5℃.
    • The altitude of the installation site shall not exceed 2000m.
    • Humidity: When the maximum temperature is +40℃, the relative humidity of the air does not exceed 50%. Higher relative humidity can be allowed at lower temperatures, such as reaching 90% at 20℃. Special measures should be taken to treat occasional condensation due to temperature changes.
    • The pollution level of the surrounding environment is level 3.
    • The switch should be installed in a place without significant shaking, impact vibration, and invasion of rain and snow. The installation location should be free of explosive hazardous media, and there should be no gas or dust in the media that can corrode metals and damage insulation.

    Structure Characteristics

    The switch is composed of a base, contacts, cover, operating handle, arc extinguishing device, etc. The base is made of unsaturated polyester molded plastic, and the rest are pressed with arc resistant plastic. The fuse installed on the cover serves as the moving contact. The handle rotates in a fan-shaped motion along the fulcrum on the base, and the cover is connected to the fuse for opening and closing. The base is equipped with an arc extinguishing chamber to ensure the segmented ability of the switch. This product has a simple structure that is easy to disassemble and assemble.

    • Strong arc extinguishing ability and beautiful appearance.
    • Two installation methods: Screw FixedHook Fixed
    • Fixed installation with hooks — the busbar does not require punching, making installation more convenient, flexible, and reliable.
    • A 3-pole strip fuse holder installed on the bus track integrates three vertically arranged single pole fuse holders, with one contact (feed contact) of each phase connected to one phase, and other contacts (output contact) equipped with wire connection devices.
    • The carrier for the live parts is made of sturdy fiberglass reinforced polyester material. Silver plated fuse contacts combined with tin plated lead plate ensure low energy consumption, high power acceptance, and low temperature rise.

    Main Technical Parameters

    ▶ Relationship Between Switches and Fuses

    Agreed Heating Current Ith Matching Fuse Size Rated Current of Fuse (A)
    160 NT00、NH00 10、16、25、32、40、50、63、80、100、125、160
    250 NT1、NH1 63、80、100、125、160、200、250
    400 NT2、NH2 160、200、250、315、400
    630 NT3、NH3 250、315、400、500、630

    ▶ Main Technical Parameters of Switches

    160 250 400 630
    With fuse Rated working voltage Ue V AC400 AC500 AC690 AC400 AC500 AC690 AC400 AC500 AC690 AC400 AC500 AC690
    Rated working current le A 160 125 100 250 250 200 400 400 315 630 630 500
    Agreed heating current lth A 160 125 100 250 250 200 400 400 315 630 630 500
    Utilization category AC-23B AC-22B AC-21B AC-23B AC-22B AC-21B AC-23B AC-22B AC-21B AC-23B AC-22B AC-21B
    Rated limiting breaking current lq kA 50 100 100 50 100 100 50 100 100 50
    Rated insulation voltage Ui V 1000 1000 1000 1000
    Rated impulse withstand voltage Uimp kV 12 12 12 12
    Rated frequency Hz 50/60 50/60 50/60 50/60
    Electrical life Time 200 200 200 200
    With isolation knife Rated operational voltage Ue V / AC500 AC500 AC500
    Rated working current le A / 250 400 630
    Agreed heating current lth A / 250 400 630
    Utilization category / AC-23B AC-23B AC-23B
    Short time withstand current lcw KA / 12 12 12
    Rated insulation voltage Ui V / 1000 1000 1000
    Rated impulse withstand voltage Uimp kV / 12 12 12
    Rated frequency Hz / 50/60 50/60 50/60
    Electrical life Time / 200 200 200
    Mechanism Mechanical lifespan Time 1400 1400 800 800
    Distance between busbars mm 185 185 185 185
    IP Grade Front Open IP20 IP20 IP20 IP20
    Closing IP30 IP30 IP30 IP30
    Working conditions Way of working Work-conserving
    Manipulate Hand shank
    Installation Perpendicular
    Pollution degree 3
    Overvoltage level I IV

    Installation Precautions

    Please Note
    1. The contact parameters of the switch have been set by the manufacturer and cannot be adjusted freely during use.
    2. During the connection process between the busbar and the product, it is necessary to ensure that the distance between the busbar holes is consistent with the product wiring holes to avoid product damage caused by external forces.

    Ordering Notice

    How to Order

    Customers must indicate the product name, model, rated current, number of poles, and quantity.

    Example: HHT10-400/3F (with fuse 315A)

    ⓘ Note: The specifications and external dimensions may change due to product improvements without prior notice. The actual product shall prevail.

    Frequently Asked Questions (FAQ)

    QWhat is the maximum ambient temperature for installing the HHT10 Series Fuse Switch Disconnector?
    AThe maximum ambient air temperature for installation and operation is +40℃, with a minimum of -5℃. At the maximum temperature of +40℃, the relative humidity must not exceed 50%.
    QWhat are the two installation methods available for the HHT10 Series switch?
    AThe HHT10 Series supports two installation methods: screw fixed installation and hook fixed installation. Hook fixed installation is particularly convenient as it does not require punching holes in the busbar, offering more flexible and reliable mounting.
    QWhat fuse sizes are compatible with the HHT10-250 model?
    AThe HHT10-250 model is compatible with NT1 and NH1 fuse sizes, supporting rated fuse currents of 63A, 80A, 100A, 125A, 160A, 200A, and 250A.
    QWhat is the rated insulation voltage and impulse withstand voltage for the HHT10 Series?
    AAll models in the HHT10 Series (160A, 250A, 400A, and 630A) share a rated insulation voltage (Ui) of 1000V and a rated impulse withstand voltage (Uimp) of 12kV.
    QHow should I specify my order for an HHT10 Series Fuse Switch Disconnector?
    AWhen placing an order, please provide the product name, model number, rated current, number of poles, and required quantity. For example: HHT10-400/3F (with fuse 315A). Please note that specifications may change due to product improvements without prior notice.
    QWhat materials are used in the construction of the HHT10 Series switch base and housing?
    AThe base is made of unsaturated polyester molded plastic, while the other components are pressed with arc-resistant plastic. The live parts carrier is made of sturdy fiberglass reinforced polyester material, and the fuse contacts are silver plated and combined with tin plated lead plates to ensure low energy consumption and low temperature rise.