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‣  Protection of Transformer‣  Equivalent Circuit diagram of single phase Transformer ‣  Core type Transformer and Shell type Transformer‣  Transformer with winding Resistance and Magnetic Leakage‣  Transformer with winding Resistance but No Magnetic Leakage‣  Equivalent Resistance of single phase Transformer‣  Magnetic leakage of Single Phase Transformer‣  Oil Flow Indicator of the pump of Power Transformer‣  Silica Gel Breather of Transformer‣  Oil Pump of Transformer ‣  Radiator of Transformer and working of Radiator‣  PRD of Transformer‣  MOG ( magnetic oil gauge ) of Transformer‣  Bushing of Transformer ( for H.V side and L.V side )‣  WTI and OTI of Transformer‣  Buchholz Relay of Transformer and Working of Buchholz Relay‣  Conservator tank of Transformer‣  What is a Power Transformer ?‣  Short Circuit Test or Full load Cu loss of Transformer ‣  Open circuit test or No load Test of Transformer ‣  Parallel operation of 3-phase Transformer‣  Earthing or Neutral Grounding Transformer ‣  Transformer on On load Condition ‣  What is a Transformer ?‣  E.m.f Equation of Transformer ‣  Transformer on No load Condition

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Transformer with winding Resistance but No Magnetic Leakage

In an actual transformer, there will be some resistance in both sides winding i.e primary & secondary winding due to the presence of copper winding .

Now, we describe what is the effect in transformer due to presence of winding resistance but no magnetic leakage ?

Fig-1

Let, R₁ = Primary winding resistance,
R₂ =Secondary winding resistance,
V₁= Primary applied voltage,
V₂=Secondary terminal voltage,
E₁= Primary induced e.m.f,
E₂= Secondary induced e.m.f,
I₁= Primary current,
I₂= Secondary Current, ( which are shown in fig-1 )

a) Due to the presence of secondary winding resistance ( R₂), an amount I₂R₂ voltage drop will be occurred in the secondary winding.
Hence, the secondary Terminal voltage (V₂) is equal to the vector difference of E₂ and resistance voltage drop I₂R₂,

i.e V₂=E₂-I₂R₂

b) Similarly, Primary induced e.m.f E₁ is equal to the vector difference of V₁ and primary resistance voltage drop I₁R₁,

i.e E₁=V₁ - I₁R₁

The vector diagrams are shown below on different loading condition of transformer at no magnetic leakage :-

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