2.5 MVA Dry Type Distribution Transformer

2.5 MVA Dry Type Distribution Transformer Datasheet:

Power Rating: 2500 kVA

Frequency: 50 Hz

Primary Voltage: 11 kV

Secondary Voltage: 400 V

Phase : Three Phase

Winding Material: Copper/Aluminum

Core Material: CRGO (Cold Rolled Grain Oriented)

Insulation: Class F or H (as per requirement)

Cooling Type: Natural Air/ Forced Air/ Forced Oil

Vector Group: Y/Yd11

Impedance Voltage: 6%

Efficiency: 98%

Temperature Rise: Less than 85 degrees Celsius (as per standard)

IP Rating: IP00/IP20/IP23 (as per requirement)

Weight: Approx. 4000 kg (may vary based on design)

Dimensions: (LxWxH) 3400mm x 1650mm x 2100mm (may vary based on design)

Standards: IEC 60076, IS 2026, ANSI, etc. (as per requirement)

2.5 MVA Dry Type Distribution Transformer Features:

1. It is safe, fire-proof, and pollution-free, and can be operated directly in the load center.

2. Using German technology. High mechanical strength, short circuit resistance, small partial discharge, good thermal stability, high reliability and long life.

3. Low loss, low noise, remarkable energy-saving effect, and maintenance-free.

4. Good heat dissipation performance and strong overload capacity.

5. It has good moisture resistance and is suitable for working in other harsh environments with high humidity.

6. It has a complete temperature monitoring and protection system. The intelligent signal temperature control system can automatically monitor and display the individual operating temperatures of the three-phase windings.

7. In addition, there are alarms, circuit breakers, and other function settings.

8. Small size, light weight, less floor space and low installation cost. Features:

2.5 MVA Dry Type Distribution Transformer Production Process

The iron core is made of high-quality cold-rolled silicon steel plate, which is a 45-degree stepped full oblique joint structure. In order to improve the magnetic flux distribution at the junction and reduce the vibration energy of the iron core, the three-cut two-punch core iron angle fork cutting process and the five-step cutting laminated iron process are adopted. The iron core is integrally hardened, and the surface is sealed with insulating resin, which can effectively reduce no-load loss, no-load flow and iron core noise.

2.5 MVA Dry Type Distribution Transformer Iron Core

The high-voltage coils are wound with high-quality F-class insulated wires and international advanced insulating materials, and the large-capacity coils are equipped with cooling air passages in the axial direction. The structure has current shock resistance, temperature change resistance, crack resistance, and excellent heat dissipation performance. Using multi-section segmented cylinder structure, it has strong pressure resistance and low partial discharge level. Coil molds are filled after vacuum drying.

The entire injection and solidification process is completed based on the pre-created process curve, and the advanced process control ensures that there are no air holes and holes in the reel.

The low-voltage coil adopts a foil structure, which effectively solves the ampere imbalance problem of the low-voltage high-current coil coil. On the other hand, the foil coil does not have the number of shaft windings and the helix angle of the number of shaft windings, which effectively removes the axial force of the transformer during short circuit, and the current density in the coil can be adjusted to the axial direction according to the load distribution of the high voltage coil to ensure The radial force will be reduced. The end of the coil is sealed and cured with resin to prevent various foreign objects and moisture from entering.

2.5 MVA Dry Type Distribution Transformer Use:

A working situation that meets the following requirements is a normal working situation:

1. Height

The altitude cannot exceed 1000 meters.

2. Ambient temperature

Highest temperature +40℃

Higher average daily temperature +30°C

Higher annual average temperature +20°C

Lower temperature -30°C (suitable for outdoor transformers)

Lower temperature -5°C (suitable for indoor transformers)

3. supply voltage waveform

The waveform of the power supply voltage is similar to a sine wave.

4. Symmetry of multi-phase power supply voltage

The mains voltage connected to the polyphase transformer should be almost symmetrical.

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