Slide 1

Core form Shell form Transformer Construction

Slide 2

Core is made up of laminations to reduce the eddy current losses. The thickness of laminations is usually 0.4mm. Transformer Construction

Slide 3

Slide 4

Slide 5

Left: Windings shown only on one leg Right: Note the thin laminations

Slide 6

Classification of transformers according to turn ratio:

Slide 7

1- Power transformer 2- Distribution transformer 3- Measuring transformers A)voltage transformer B) current transformer 4-Autotransformer- Tapped autotransformer Classification of transformers according to their function:

Slide 8

It is a power transformer connected to the output of a generator and used to step its voltage up to the transmission level. Power Transformer A 1300 MVA, 24.5/345 kV, 60Hz transformer with forced oil and air (fan) cooling.

Slide 9

It is a transformer converting the distribution voltage down to the final level. Distribution Transformer A 60 MVA, 225/26.4 kV, 60 Hz transformer showing the conservator.

Slide 10

Classification of transformers according to number of phases: 1- Single phase transformer 2- Poly phase transformer