2500 KVA 11 to 0.4 KV Dry Type Transformer

The 2500 kVA 11 to 0.4 kV dry type transformer mainly consists of the following components: transformer core, transformer windings, transformer insulation, transformer conductors, transformer cooling device, and temperature measuring device.

Coils

The 2500 kVA 11 to 0.4 kV dry type transformer coils are wound on high precision winding machines. The low voltage winding adopts a foil winding construction. For larger capacity transformers, ventilation ducts are reserved. After winding, vacuum drying is carried out. The casting and solidification process is strictly performed in accordance with process standards, ensuring that there are no bubbles or voids inside the coils, allowing the transformer to achieve optimal operation.

Core

The core of this series of 2500 kVA 11 to 0.4 kV dry type transformer is made of high quality, high permeability grain oriented cold rolled silicon steel sheets. Advanced silicon steel sheet cutting lines and a 45° fully mitered step lap core stacking technique are adopted. The core limbs are bound with Class F unidirectional glass fiber tape, and a new structure of pull plates without punching holes on the core yoke is used for fixing. The core surface is coated with epoxy resin, which reduces the influence of leakage flux, effectively optimizes the magnetic circuit distribution, and reduces core noise, no load losses, and no-load current. This significantly improves the appearance quality of the distribution transformer.

High Voltage Winding

The high voltage winding of 2500 kVA 11 to 0.4 kV dry type transformer adopts a segmented layer structure, which greatly reduces the voltage between layers of the winding. It is formed by vacuum cast epoxy resin with filler, reducing the internal partial discharge level of the winding and improving the electrical performance of the coil. The insulation between winding layers uses DMD epoxy resin prepreg cloth, which increases the withstand voltage strength. The winding surface is filled with fiberglass mesh fabric, improving the impact toughness of the coil, enhancing the short circuit withstand capability of the distribution transformer. The coil never dries out or cracks.

Low Voltage Winding:

The low voltage winding adopts a foil construction. Radial cooling ducts are used in the coil to enhance heat dissipation capability. The insulation between layers of the 2500 kVA 11 to 0.4 kV dry type transformer’s low voltage winding uses DMD epoxy resin prepreg cloth. The ends are sealed and potted with epoxy resin, resulting in integral cured forming.

Product Parameters:

Producing Equipment

Semi Finished Product

Protection Enclosure IP21

Transformer Core

Transformer Winding

Test Center

Winding Workshop