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    1. Labs
    2. VTU THEORY
    3. VTU Sem 1
    4. BASIC ELECTRICAL ENGINEERING
    5. Module – 5
    starting of motor using stars-delta starter
    Necessity of a starter
    Applications of squirrel - cage and slip - ring motors
    Slip and its significance
    Types and Constructional features.
    Frequency of the rotor induced emf
    Slip
    Synchronous speed
    Concept and production of rotating magnetic field
    Three Phase Induction Motors : Principle of operation
    Illustrative problems on emf equation and efficiency only
    Voltage regulation and its significance
    Condition for maximum efficiency
    efficiency
    variation losses with respect to load
    losses
    Emf equation
    Principle of operation and construction of single-phase transformers (core and shell types)
    Transformers : Necessity of transformer
    Single Phase
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