In this lecture, we will discuss the Difference Between Core and Shell Type Transformers with a detailed discussion of types of transformers. So let’s start from the basic knowledge of both types of transformers and then we will discuss the differences.
The transformers are of different types depending on the arrangement of the core and the winding as follows:
Now we will first see some important points of both core and shell-type transformers and then we will discuss the difference Between Core and Shell Type transformers.
Also Read: Losses in Transformer
Core Types Transformer
The construction of the core-type transformer is shown in the figure below.
The core of this transformer is in the form of a rectangular frame made from laminations. It provides a single magnetic circuit as shown in the below figure.
The primary and secondary windings are uniformly distributed on two limbs of the core.
Both the windings are of cylindrical shape and they are arranged in a concentric manner with the low voltage winding placed near the core.
Shell Types Transformer
The below figure shows the construction of a shell-type transformer.
The primary and secondary windings are placed on the central limb of the core. The high voltage and low voltage windings are of sandwich type, which are in the form of interleaved pancakes.
This type of core provides a double magnetic circuit. This type of core provides better mechanical support and protection for the windings.
Difference Between Core and Shell Type Transformer
|Core Type Transformer||Shell Type Transformer|
|The core has only one window.||The core has two windows.|
|Windings encircle the core.||Core encircles the windings.|
|Cylindrical windings are used.||Sandwich-type windings are used.|
|This transformer is easy to repair.||It is not so easy to repair.|
|Better cooling since more surface is exposed to the atmosphere.||Cooling is not very effective.|
|Less mechanical protection to the coils (windings).||Better mechanical protection to the coils (windings).|