The efficiency of a transformer is given by,

Now, input = output + losses = V

_{2}I_{2}_{ }_{ }cos Φ + losses Thus as the power factor of the load is more i.e. cos is higher, x/cosΦ is lesser. Hence the second term in the equation (3) becomes lesser and efficiency will be more.

**Key**

**Point**: As power factor increases, the efficiency increases.

please send equivalent circuit diagram of three transformer,autotransformer notes

ReplyDeletePlease send me the notes on equivalent circuit of three phase transformer and auto transformer notes.

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