Parts of Transformer

PARTS OF TRANSFORMER

The various parts of transformers are

(i) Core

(ii) Limb

(iii) Yoke

(iv) Windings

(v) Conservator

(vi) Breather

(vii) Explosion vent

(viii) Buck holz relay

Core:

It is made up of high grade silicon steel laminations. It carry the flux, provide low reluctance to it. It is in the shape of 'L' (or) 'I'.

Limb:

It is vertical portion of the core and its function is to carry the windings.

Yoke:

The top and bottom horizontal portion of the core is called yoke. Its function is to carry the flux produced by one winding to reach the other winding.

Windings:

The coils used are wound on the limbs and are insulated from each other the function of the windings is to carry the current and produce the flux.

Conservator:

The oil in the transformer expands when temperature inside the transformer increases due to heat. While it contracts when the temperature decreases.

Breather:

Smaller transformer are not fully filled with oil and some space remains between oil level and tank. The tank is connected to atmosphere by vent pipe. When oil expands air goes out while when oil contracts the air is taken in. The breather is a device which extract the moisture from the air when the air is taken in and does not allow oil to come in contact with the moisture. It contain the silica gel crystals.

Explosion vent:

It is a bent pipe fitted on the main tank which acts as a relief valve.

Buchholz relay:

It is a safety gas operated relay connected to transformer. When the fault gets developed inside the transformer, the gases are released.