15/09/2026
bTypes of transformer & their uses:
Transformers are essential electrical devices used to transfer electrical energy between circuits while changing voltage and current levels through electromagnetic induction. Depending on their construction, application, voltage level, and operating conditions, different transformer types are used across power generation, transmission, distribution, industries, railways, and electrical equipment.
🔹 Power Transformer – Used mainly in high-voltage transmission networks to transfer large amounts of electrical power efficiently.
🔹 Distribution Transformer – Steps down voltage to suitable levels for supplying electricity to homes, commercial buildings, and industries.
🔹 Dry-Type Transformer – Uses air or solid insulation instead of liquid insulation and is commonly installed indoors where fire safety is important.
🔹 Potential Transformer (PT) – Reduces high voltage to a measurable level for metering, protection, and monitoring systems.
🔹 Current Transformer (CT) – Produces a reduced current proportional to the primary current for measurement and protective relays.
🔹 Isolation Transformer – Provides electrical isolation between circuits while maintaining approximately the same voltage ratio.
🔹 Autotransformer – Uses a common winding for primary and secondary circuits, offering a compact and efficient solution for voltage adjustment.
🔹 Three-Phase Transformer – Designed for three-phase electrical systems and widely used in industrial and power distribution applications.
🔹 Single-Phase Transformer – Used for single-phase power supplies, control circuits, residential systems, and smaller electrical loads.
🔹 Furnace Transformer – Designed to supply very high currents required by electric furnaces and other heavy industrial heating processes.
🔹 Rectifier Transformer – Works with rectifier systems to provide suitable AC power for conversion into DC power.
🔹 Traction Transformer – Used in railway electrification system
