SC (B) 10, 11 Resin-Insulated Dry-Type Transformers

SC(B)10-30~2500/10 Series Epoxy Resin Casting Dry-Type Transformer

This series of epoxy resin casting dry-type transformer materials is selected for its optimal quality and scientifically formulated composition. It is produced using advanced production and testing equipment according to strict manufacturing processes. The products feature high reliability and long service life. Depending on the different operating environments, they can be equipped with shells of varying protection levels or without any shell. Suitable for important or special environments such as high-rise buildings, commercial centers, airports, tunnels, chemical factories, nuclear power plants, and ships.

Feature Highlights:

Safe, fire-resistant, and pollution-free, ready for direct operation at load centers.

Utilizing German HTT technology, offers high mechanical strength, excellent short-circuit resistance, minimal partial discharge, good thermal stability, high reliability, and a long service life.

Low loss, low noise, significant energy-saving effect, maintenance-free.

Excellent heat dissipation, strong overload capacity, and can increase capacity operation when forced air cooling.

Excellent moisture resistance, suitable for operation in high humidity and other harsh environments.

Equipped with a comprehensive temperature monitoring and protection system. Utilizes an intelligent signal temperature control system to automatically monitor and巡回display the working temperature of each three-phase winding, and can automatically start and stop the fan, with functions for alarms and tripouts.

Compact, lightweight, space-saving, and low installation cost.

The core is made of cold-rolled silicon steel sheets with a 45-degree stepped full bevel joint structure. By using a three-cut, two-punch corner trimming process and a five-step stepwise cutting and lamination technique, the magnetic flux distribution at the joint is improved, and the vibration energy of the core is reduced. The core undergoes a one-piece curing process and is sealed with insulating resin on the surface, effectively reducing no-load losses, no-load current, and core noise.

The high-voltage coil is wound with wire insulated with F-grade insulation and using internationally advanced insulating materials. The larger capacity coils are equipped with axial ventilation channels for heat dissipation. This structure offers excellent resistance to current surges, temperature changes, cracking, and superior heat dissipation capabilities. It features a multi-stage segmented cylindrical structure, with strong overvoltage withstand capacity and very low partial discharge levels. The coil is molded and vacuum-dried before being cast, with the entire casting and curing process completed according to a pre-programmed process curve. Precise process control ensures the coil is free of air bubbles and voids.

The low-voltage coil employs a foil structure, effectively addressing the issue of ampere-turn imbalance in wire-wound coils with low voltage and high current, while the foil coils do not have axial turns or winding helix angles, thus effectively eliminating the axial force on transformers during short circuits. This ensures that the current density within the coil can be freely adjusted along the axis according to the load distribution of the high-voltage coil, reducing radial forces during low-voltage sudden short circuits. The ends of the wound coil are sealed and cured with resin, preventing the entry of various foreign objects and moisture.

Normal usage conditions are met when the following usage requirements are satisfied:

a. Altitude

Altitude not exceeding 1,000 meters.

b. Environmental Temperature

To High Temperature           +40℃

　　ToHigh Average Daily Temperature +30℃

　　ToAverage Annual Mean Temperature +20℃

　　ToLow Temperature -30℃ (Applicable to outdoor transformers)

　　ToLow temperature -5℃ (for indoor transformers)

c. Power voltage waveform

The power voltage waveform is similar to a sine wave.

d. Symmetry of multi-phase power voltage