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Single-Phase Transformers. • This is an isolation transformer. The secondary winding is physically and electrically isolated from the primary winding. UNIT – IV. SINGLE PHASE TRANSFORMERS. TRANSFORMERS. The transformer is a device that transfers electrical energy from one electrical circuit to. A single-phase transformer with a 2-kVA rating has a. 480-V primary, and a 120-V secondary. Determine the primary and secondary full-load currents of the trans-. 28.2 Problems on 2 winding single phase transformers. 1. The O.C and S.C test data are given below for a single phase, 5 kVA, 200V/400V, 50Hz transformer. There are two types of windings in a single-phase transformer. These are called primary and secondary windings or coils. The primary winding is connected to. SINGLE-PHASE TRANSFORMERS: Equivalent circuit, losses, efficiency, condition for Losses of transformer are divided mainly into two types: 1. Iron Loss. Transformers: Single phase transformer, Constructional details, Core, windings, Insulation, principle of operation, emf equation, magnetising current and core o Single phase transformers o Three-phase transformers o Auto-transformers Part A Single-Phase Transformer. 2nd Year/ Comm. Eng. Div. Lecture Note 3.