35kV Three-phase Epoxy Cast Dry Distribution Transformer

Product overview:

•  Lower loss, more energy saving, 30% energy saving than SCB11 transformer loss.

• Actual measurement is better than GB and IEC standards, CB, CCC, KEMA SASO and other certification.

• Better safety excellent fire performance, F1 class.

• High lightning resistance level (175kV for 35kV products).

• Equipped with perfect temperature protection control system, it can operate at 120% rated load under forced air cooling condition.

• Global operation verified high reliability, has been exported to more than 50 countries and regions.

• Mainly used in 35KV urban distribution network, industrial and mining enterprises and civil building power supply and distribution system.

• Products are mainly exported to Southeast Asia, the Middle East, Africa, South America and other countries and regions.

• Implementation standard: IEC 60076 series, GB1094 series, GB/T6451-2008.

• The shell material is aluminum alloy, cold rolled steel plate, stainless steel, etc. (protection grade IP20, IP23, etc.)）

Product advantages

Leading technology

• High pressure copper tape winding technology, flame retardant formula vacuum pouring.

• Low pressure copper foil winding technology, thermosetting epoxy prepreg cloth insulation.

• High quality iron core 45° full oblique joint step laminated structure.

The iron core

• The core is made of high quality cold rolled grain oriented silicon steel sheet insulated by mineral oxide.

• Minimize loss level, no-load current and noise by controlling the cutting and stacking process of silicon steel sheet.

• Apply class F or CLASS H core paint on the surface of assembled cores to prevent corrosion and rust.

Low voltage winding

• The low voltage winding is made of high quality copper foil.

• Insulated by thermosetting epoxy preimpregnated cloth.

• Winding ends are insulated with thermosetting epoxy preimpregnated cloth.

• Excellent insulation resistance.

• Very good resistance to radial stress caused by short circuit.

• The outgoing terminal of the low-voltage winding is tinned copper bar.

• The whole winding is heated in the oven to 140°C and polymerized for 4 hours. It has excellent corrosion resistance of industrial gas.

High voltage winding

• Made of insulated copper wire and using the patented technology of Hengfengyou Electric.

• For small volume products, the high voltage winding uses a linear voltage gradient from top to bottom.

• For products with large capacity, the high voltage winding is made by "tape winding" technology.

• The application of these methods makes the electric field between adjacent conductors very low.

• Transformer structure is reliable during normal operation and transportation.

High quality material

• Baowu Steel Group production of silicon steel sheet.

• China produces high quality anaerobic copper.

• Huntsman Epoxy resin (including flame retardant filler).

Product parameters

Ordering instructions

• Main parameters of transformer (voltage, capacity, loss and other main parameters.

• Transformer operating environment (altitude, temperature, humidity, location, etc.

•  Other customization requirements (coupling groups, colors, oil pillows, etc.

• The minimum order quantity is 1 sets, worldwide delivery within 7 days.

• Normal delivery period of 30 days, worldwide fast delivery.

What is the epoxy casting process for the windings and core z of the transformer？

Manufacture of Windings and Iron Cores：

Windings Manufacture:

• Use a wire winding machine to wind the copper wires into the required shapes and number of layers.

• Ensure the uniformity and compactness of the windings.

• Add insulating materials, such as insulating paper or insulating tape, between each layer of copper wires.

Iron Core Manufacture:

• Use a silicon steel sheet laminating device to laminate the silicon steel sheets into an iron core.

• Ensure the flatness and compactness of the iron core.

• Conduct necessary pre-treatments on the iron core, such as deburring and cleaning.

Assembly：

Assembling Windings and Iron Cores:

• Assemble the windings and the iron core together, ensuring the correct positions and connections between them.

• Use temporary fixing devices (such as clamps) to fix the windings and the iron core to prevent displacement during the casting process.