Single Phase Transformer Library

Single Phase Transformer Library

 ➣ Introduction

➣ Self Inductance

➣ Mutual Inductance

➣ Coefficient of Coupling or Magnetic Coupling Coefficient (k)

➣ Dot Convention and Equilibrium Equations
     Sign Convention for KVL
     Writing Equilibrium Equations fore Coupled Circuit

➣ Inductive Coupling in Series
     Series Aiding
     Series Opposing

➣ Inductive Coupling in Parallel 
     Parallel Aiding
     Parallel Opposing
➣Energy in a Pair Coupled Coil

➣ Introduction to Transformer

➣Principle of Working

    Can D.C. Supply be Used for Transformer ?

➣ Construction

     Types of Windings

➣ Construction of Single Phase Transformers

     Core Type Transformer

     Shell Type Transformer

      Berry Type Transformer

➣ Comparison of Core and Shell Type Transformers

➣ E.M.F. Equation of a Transformer

➣ Ratios of a Transformer

    Voltage Ratio

    Concept of Ideal Transformer

    Current Ratio

     Volt-Ampere Rating

➣ Ideal Transformer on No Load

➣ Practical Transformer on No Load

➣ Transformer on Load (M.M.F. Balancing on Load)

➣ Effect of Winding Resistances

     Equivalent Resistance

➣ Effect of leakage Reactances

     Equivalent Leakage Reactance

➣ Equivalent Impedance

➣ Phasor Diagrams for Transformer on Load

    Unity Power Factor load, cosΦ₂ = 1

    Lagging Power Factor Load, cosΦ₂

    Leading Power Factor load, cosΦ₂

➣ Equivalent Circuit of a Transformer

     Approximate Equivalent Circuit

➣ Approximate Voltage Drop in a Transformer

➣ Voltage Regulation of Transformer

     Expression for Voltage Regulation

     Zero Voltage Regulation

    Constants of a Transformer

➣ Losses in a Transformer

    Core or Iron Losses

     Copper Losses

➣ Efficiency of a Transformer

➣ Condition for Maximum Efficiency

     Load Current at Maximum Efficiency

     KVA supplied at Maximum Efficiency

 ➣ Effect of Power Factor on Efficiency

➣Effect of Frequency and Supply Voltage on Iron Losses

➣ Design of Single Phase Transformer for Instrument Power Supply
➣ All Day Efficiency of a Transformer

➣ O.C. and S.C. Tests on Single Phase Transformer

    Open Circuit Test (O.C. Test)

    Short Circuit Test (S.C. Test)

    Calculation of Efficiency from O.C. and S.C. Tests

    Calculation of Regulation

➣ Polarity Test

➣ Sumpner's Test (Back to Back Test)

➣ Separation of Core Losses Tests

➣ Parallel Operation of Transformers

➣ Conditions for Satisfactory Parallel Operation

     Explanation of Conditions

➣ Parallel Operation of Two Ideal Transformers

➣ Parallel Operation of Transformer With Equal Ratios

➣ Parallel Operation of Transformer With Unequal Voltage Ratios

➣ Methods of Cooling Transformer

➣ Tap Changing Transformer