Low frequency heating transformer vacuum drying plant CMM-6

    GlobeCore

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    Low Frequency Heating Transformer Vacuum Drying Oven CMM-6 is designed for drying the solid insulation of power transformers.

    A common practice during the production or repair of power transformers is to remove moisture from paper insulation. The dried insulation has dielectric strength 20 times greater than not dried one, as moisture affects its dielectric breakdown.

    Depending on the types of transformers there are several ways to remove moisture from the active part. One of them is drying with a vacuum furnace (vacuum oven).

    Drying of power transformers with vacuum furnaces has the following advantages:

    • more intensive evaporation of moisture in comparison with drying with warm air or natural drying;
    • optimal overall performance and reduced processing time.

    GlobeCore offers a transformer vacuum furnace with modifications, adapted to meet specific needs of the customer. The design, accounts for productivity, dimensions, and placement location, loading method, degree of automation, etc.

    1 – Autoclave; 2 – Trolley; 3 – Door with lock mechanism; 4 – Oil filling unit; 5 – Vacuum pump group with condenser; 6 – Control panel; 7 – Trolley support; 8 – Chiller

    Drying of transformer insulation with a vacuum oven CMM-6 is characterized by automated checkout and recording of important operating parameters: heating temperature, operating vacuum in the chamber, changes in moisture content of insulation, and condensate in the chamber. It is also possible to automatically record the listed parameters on the in the memory of the controller, to form a file with report and protocol.

    Item

    Unit

    Value

    Type

    Vacuum furnace with forced air flow

    Voltage

    V

    415

    Frequency

    Hz

    50

    Empty drying chamber dimensions

    mm

    L5000 x W3000 x H4000

    Heating type

    Electric resistance heater with auxiliary heating of short circuited transformer by low frequency current (LFH)

    Max power of resistance heater

    kW

    120

    Max power of LVH heater

    kW

    50

    Vacuum system

    Double stage

    Mechanical booster

    m3/hour

    2 х 2100

    Rotary vane oil sealed pump

    m3/hour

    2 х 300

    Door opening

    Electrically driven, vertical, lateral to the left.

    Door seal

    Hydraulic

    Cart drive

    Electric

    Cart weight capacity

    Kg

    20000

    Control type

    SCADA automation

    Max temperature

    °С

    175

    Nominal temperature

    °С

    120

    Total dimensions of installation site

    Length

    mm

    17000

    Width

    mm

    12000

    Height

    mm

    7000

    Total weight

    kg

    35000

    • uniform drying of the entire transformer core volume;
    • economic use of electricity;
    • reduced duration of drying;
    • simple operation;
    • process parameters control and logging;
    • removal of moisture from chamber;
    • the chamber is made of anti-corrosion material