Expertise Across Industries
Weselec Industries Facilities
Core Slitting
High-grade cold rolled grain-oriented (CRGO) silicon electrical steel is processed using advanced CNC slitting machines to achieve precise widths and burr-free edges. This meticulous approach reduces core losses and preserves optimal magnetic properties, thereby enhancing transformer efficiency and supporting long-term performance reliability.
Core Cutting
Once the core is slit, high-precision CNC machines cut laminations to exact transformer design specifications. Modern cutting techniques are applied to reduce no-load losses and noise levels. This optimized process ensures efficient material utilization while maintaining dimensional accuracy and consistent magnetic performance.
Core Assembly
Transformer LV Winding
The LV (Low Voltage) winding of a distribution transformer is constructed from high-grade copper, either coated with enamel or wrapped in premium insulation paper. Precision winding machines are used to achieve uniform turns and proper tension control, which helps maintain dimensional accuracy. High-quality insulation materials are essential for enhancing dielectric strength and thermal performance, ultimately reducing losses and improving the efficiency and operational life of the transformer.
Transformer HV Winding
The HV (High Voltage) winding, on the other hand, is also manufactured using high-grade copper but is specifically designed to withstand high voltage stresses. The copper is carefully wrapped with premium insulation paper, and the winding process follows strict quality standards to ensure accurate layering, proper insulation spacing, and robust mechanical strength. This meticulous design ensures excellent voltage regulation, thermal stability, and long-term reliability, even under varying load conditions.
Tank Manufacturing
Transformer tanks are meticulously engineered to endure internal pressure, mechanical stress, and diverse environmental conditions throughout their operational lifetime. Constructed from premium-grade mild steel sheets, these tanks undergo precise cutting, bending, and welding procedures to guarantee structural integrity and longevity. Every tank is specifically designed to prevent oil leakage, withstand corrosion, and deliver reliable performance over extended periods, even in challenging outdoor settings.
Transformer Assembly
The core and windings together constitute the transformer’s active part. Once the bushings and windings are securely connected, the transformer is subjected to controlled oven drying using specific temperature and time cycles to remove moisture and strengthen insulation. Following this process, the dried active assembly is placed into the tank, and then oil is introduced under vacuum conditions to achieve thorough impregnation and enhance dielectric properties.
Final Testing
The finished product undergoes a complete set of standard routine and performance tests to ensure it meets all design and regulatory requirements. Testing includes insulation resistance, winding resistance, turns ratio, vector group verification, no-load and load loss measurements, high-voltage withstand tests, and oil quality analysis. Each transformer is thoroughly inspected and certified by our Quality Assurance team before approval. This rigorous testing process guarantees reliability, safety, and long service life in real operating conditions.