2500 kVA Dry Transformer-10/0.4 kV | Georgia 2025

Resin Cast Dry Type Transformer - The Choice for Efficient, Safe, and Eco-Friendly Power Transmission!

01 General

1.1 Project Description

The 2500 kVA resin cast dry type transformer was delivered to Georgia in 2024, the rated power of the dry transformer is 2500 kVA. The high voltage of this dry transformer is 10kV, the low voltage is 0.4kV. This high voltage dry type transformer is equipped with a no load tap changer, the tapping range is ±2*2.5% at the primary side, the cooling is KNAN/KNAF.

Resin cast dry type transformers represent the pinnacle of modern transformer technology, expertly blending electrical efficiency with robust mechanical resilience. The innovative construction involves encasing the windings in a solid epoxy shell, which not only enhances the transformer’s durability but also provides exceptional resistance against environmental factors such as moisture, dust, and temperature fluctuations. This unique feature ensures that resin cast dry type transformers maintain optimal performance in a variety of challenging conditions, making them ideal for use in diverse industrial applications.

Moreover, these transformers prioritize safety by eliminating the risk of oil leaks and reducing fire hazards, a critical advantage in densely populated urban settings and industrial facilities. Their installation requires less maintenance compared to traditional oil-filled transformers, leading to lower operational costs over time.

Beyond their technical strengths, resin cast dry type transformers cater to the growing demand for sustainable solutions in the energy sector. Their design aligns with environmental standards, contributing to reduced carbon footprints and supporting the sustainability goals of various industries. Whether it’s for renewable energy projects, commercial buildings, or industrial operations, resin cast dry type transformers are the smart choice for organizations looking to enhance their electrical infrastructure while promoting environmental responsibility.

1.2 Technical Specification

2500 kVA resin cast dry transformer specification and data sheet

1.3 Drawings

2500 kVA resin cast dry transformer diagram drawing and size.

02 Manufacturing

2.1 Core

The core of a resin-cast dry-type transformer is crucial for its efficiency, energy consumption, and operational stability. Made from high-permeability cold-rolled silicon steel sheets, the core features precision 45° mitred cuts and a step-lap construction that optimize magnetic flux and minimize losses and noise. The resin-casting process enhances its mechanical strength and vibration resistance, ensuring robust performance. The core is coated with a corrosion-resistant epoxy resin to protect against moisture and oxidation, while efficient heat dissipation channels prevent overheating, maintaining long-term performance. Utilizing advanced automation in manufacturing ensures consistent quality and precision. With its low energy loss, minimal noise, corrosion resistance, and extended service life, this core design represents cutting-edge engineering for modern power systems.

2.2 Winding

Low voltage windings are made from foil copper or aluminum sheets, insulated with multiple layers. Their helical design offers excellent stability during short circuits and reduces losses from the “skin effect.” High voltage windings consist of enameled round copper or aluminum wires and strips, designed by the transformer’s rated current. They feature multi-layer helical structures with high-quality insulation (class F or H), ensuring durability under high-voltage conditions.

2.3 Other

The winding is transferred to a vacuum casting chamber for epoxy resin casting. After preheating to remove moisture and gases, chemical materials like epoxy resin and hardener are prepared in separate containers. Once ready, these materials are mixed in a static mixer at a precise ratio and cast into molds. The coils are then cured in an oven at high temperatures to create strong solid structures.

2.4 Final Assembly

Upper and Lower Yoke Assembly: Secure the upper and lower yokes to the transformer core, ensuring stability and electromagnetic performance. Electrical Connections: Establish electrical connections between the high-voltage and low-voltage windings, ensuring connections are secure and meet design requirements. Accessory Assembly: Install accessories, such as temperature controllers, surge arrestors and so on, to ensure the overall integrity and functionality of the structure.

03 Testing

04 Packing and Shipping

05 Site And Summary

In conclusion, the resin cast dry transformer is an innovative solution in electrical engineering, providing reliable and efficient performance for modern power distribution systems. With its robust design, superior insulation, and advanced safety features, our transformers are built to withstand the challenges of demanding environments while ensuring effective energy management. By choosing our resin cast dry-type transformers, you are investing in a sustainable and high-quality solution that enhances the efficiency and safety of your electrical infrastructure. Experience the advantages of our advanced technology and elevate your power systems with a dependable and efficient choice.