Transformers, the silent powerhouses of electrical distribution, owe much of their efficiency to the intricacies of their winding systems. In this post, we’ll dive into the diverse types of transformer windings that shape the backbone of both high and low voltage transformers.
Multi-Layer Helical Windings
Ideal for high voltage transformers of 110 kV and above, these windings boast numerous cylindrical layers connected in series. The external layers are shorter to ensure consistent capacitance allocation, enhancing surge behavior.
Helical Windings or Spiral Windings
Suited for low voltage, high-capacity transformers, helical windings accommodate higher current flows. Available in single, double, and disc-helical types, these windings provide flexibility and efficiency indifferent applications.
Disc Windings
Constructed by connecting several conductor discs in series, disc windings offer robust mechanical strength. Each disc, separated by spacers, contributes to the overall radial strength of the winding.
Foil Windings
Crafted from thin aluminum or copper sheets, foil windingsare designed for high-capacity transformers. These thin insulated sheets, woundin a multilayer spiral fashion, contribute to efficient performance.
Cylindrical Windings
Utilizing circular conductors wound on vertical strips,cylindrical windings find application in low voltage scenarios. This designenhances cooling conditions, creating oil ducts for better thermal management.
Cross-Over Windings
Ideal for small transformers, cross-over windings reduce voltage between contiguous layers. With coils separated by axial distances and insulating material blocks, these windings ensure high strength.
Disc & Continuous Disc Winding
Used in high-capacity transformers, these windings consist of several discs or flat coils. Rectangular strips, spirally wound in a radial direction, create a robust structure with maximum mechanical axial strength.
Aluminum Windings
A prevalent choice, especially in North American transformers, aluminum windings offer cost efficiency and flexibility. Their lower resistivity minimizes eddy losses, making them a compelling option despite larger coil sizes.
As we unravel the intricate tapestry of transformer windings, it becomes clear that each type serves a unique purpose, contributing to the reliability and efficiency of these indispensable electrical devices.Whether it's high voltage resilience or low voltage flexibility, the world of transformer windings continues to evolve, powering the pulse of electrical distribution.
For more insightful explorations into the world of transformers, stay tuned to our blog for valuable industry insights.
