Reservations
UEE301 DIRECT CURRENT MACHINES AND TRANSFORMERS | L | T | P | Cr | | 3 | 1 | 2 | 4.5 | Prerequisite(s): None |
Single phase Transformers: Introduction, Basic principle, Types of transformer, Construction of singlephase transformer, Transformer windings, Terminals and leads, Bushings, Tapping, Cooling of transformer, Transformer oil, Conservator and breather, Buchhloz realy, Transformer tank, EMF equation of a transformer, Stepup and stepdown transformer, Transformer on noload and on load, Magnetic leakage, Transformer with resistance and reactance, Equivalent resistance and reactance, Equivalent circuit, Open circuit , Short circuit test, Separation of core losses, Total approximate voltage drop of a transformer, Exact voltage drop, Per unit resistance, Leakage reactance and impedance voltage drop, Voltage regulation of a transformer, Losses in a transformer, Efficiency of a transformer, Condition for maximum efficiency, All day efficiency, Polarity test of a singlephase transformer, Sumpner’s test, Parallel operation of singlephase transformers, Load sharing of two transformer, Auto transformer.
Threephase Transformer: Advantages of three phase transformer, Principle of operation, Construction of three phase transformers, connections, Open delta or VV connection, Scott connection or TT connection, Threephase to twophase conversion, Threephase to sixphase conversion, Threewinding transformer, Parallel operation of transformers, Rating of transformers.
Special purpose Transformers: Instrument transformers (CT and PT), Earthing transformer, Pulse transformer, High frequency transformer, Converter transformer.
General concepts of Rotating Electrical Machines: Electromagnetic torque, Reluctance torque, Constructional features of rotating electrical machines, Classifications of rotating electrical machines, Construction of DC machines, Principle of DC generator, Principle of DC motor, Lap winding, Wave winding, Electrical and mechanical degrees.
DC Generators:
Single phase Transformers: Introduction, Basic principle, Types of transformer, Construction of singlephase transformer, Transformer windings, Terminals and leads, Bushings, Tapping, Cooling of transformer, Transformer oil, Conservator and breather, Buchhloz realy, Transformer tank, EMF equation of a transformer, Stepup and stepdown transformer, Transformer on noload and on load, Magnetic leakage, Transformer with resistance and reactance, Equivalent resistance and reactance, Equivalent circuit, Open circuit , Short circuit test, Separation of core losses, Total approximate voltage drop of a transformer, Exact voltage drop, Per unit resistance, Leakage reactance and impedance voltage drop, Voltage regulation of a transformer, Losses in a transformer, Efficiency of a transformer, Condition for maximum efficiency, All day efficiency, Polarity test of a singlephase transformer, Sumpner’s test, Parallel operation of singlephase transformers, Load sharing of two transformer, Auto transformer.
Threephase Transformer: Advantages of three phase transformer, Principle of operation, Construction of three phase transformers, connections, Open delta or VV connection, Scott connection or TT connection, Threephase to twophase conversion, Threephase to sixphase conversion, Threewinding transformer, Parallel operation of transformers, Rating of transformers.
Special purpose Transformers: Instrument transformers (CT and PT), Earthing transformer, Pulse transformer, High frequency transformer, Converter transformer.
General concepts of Rotating Electrical Machines: Electromagnetic torque, Reluctance torque, Constructional features of rotating electrical machines, Classifications of rotating electrical machines, Construction of DC machines, Principle of DC generator, Principle of DC motor, Lap winding, Wave winding, Electrical and mechanical degrees.
DC Generators: