Difference Between Core Type vs Shell Type Transformer

Hello, friends, I hope you all are doing great. In today’s tutorial, we will discuss the Difference Between Core Type and Shell Type Transformer. The basic difference between core and shell-type transformers is that in core-type transformers winding is wounded on the core and in shell-type transformers core covers the winding means the core encircles the winding.

In today’s post, we will have a detailed look at both core and shell types of transformers do compare them to find their differences. So let’s get started with the Difference Between Core Type and Shell Type Transformer.

Difference Between Core Type and Shell Type Transformer

Core Type Transformer

• This type of transformer winding is wounded at the outer parts of the core.

• The core is rectangular in shape and the winding wounded has a circle-like configuration.
• The windings are wounded at arms of the core that are a certain distance apart from each other.
• It needed a large quantity of copper so it is expensive
• The transformer core has 2 number of limbs and primary and secondary winding ar wounded on them
• It can be created and designed very easily
• This core configuration is an exit in the power transformer and autotransformer
• Its design is such that flux has equal quantity on both arms
• Its physical structure is like a cylinder
• Due to separated limbs and simple structure, any fault can be repaired if it
• There is just a single circuit exit in this transformer

Shell Type Transformer

• In this type of transformer, the winding is lies at the central arm which is called the mid limb.

• Windings is arranged at the inner side of the core.
• It has three numbers of limbs than core winding that has two’
• It needed a large number of windings which made it costly
• Its fault removal is more difficult than the core transformer
• It used in less volge induterris compoent handlesing
• Forced air cooling system used for heat removal from this device
• The winding used in this transform called disc winding
• Its leakage reactance less than core

Difference Between Core Type and Shell Type Transformer

• The core transformer has a circuit having two vertical limbs and two horizontal structures known as yokes and these limbs come with winding that structure is called a core type transformer and a type transformer has one mid limb and two external limbs primary and secondary windings are wounded on the central limb
• Winding surrounds the core of the transformer for the core transformer and shell-type transformers has magnetic core around the windings
• In a core transformer, U and I-shaped cores is used, and in a shell transformer U shaped or in some cases E or I-shaped core used
• The rectangle shape core used in the shell transformer and core type transformer has a square core
• There are two limbs and two yoks for the core transformer and shell type transformer has 3 limbs and 2 yokes
• There are two magnetic circuitry for shell type transformer and core type transformer has one magnetic circuit
• Sandwich winding is used in shell-type transformers and core type transformer has concentric winding
• Shell type transformer has both windings on a central limb while core-type transformer has windings on two different limbs
• The core transformer uses larger conductors and the shell transformer uses less conductors for windings
• The core-type transformer uses less iron for core creation and the shell-type transformer uses more iron for construction
• Core losses are high in core-type transformers and shell-type transformers have fewer losses
• Copper losses are high for the core transformer and the shell-type transformer has less copper losses
• The natural cooling method used in core-type transformers and poor natural cooling for shell type transformer
• Repairing of core type transformers is easier than shell type transformer
• A small length of winding is used in core-type transformers causes low percentage impedance and the shell-type transformer has an average larger length of winding that increases percentage impedance
• The average length of the core is larger in core transformers than shell type transformer
• Core-type transformers are used for high voltage and high power and shell-type transformers are used of low voltage and low power

Related Posts:

• Transformer Symbols
• Introduction to transformer
• Instruments Transformer
• Ideal Transformer

Shell-type transformers Applications

This transformer type is best used for low-voltage uses.

It is a low-cost transformer since uses a rectangular cross-section area core.

Core type Transformer Advantages and Disadvantages

 Advantages

• It provides good mechanical stability and has features to handle external forces.
• It comes with a laminated core that reduces iron losses and flux leakage.
• it is effective for high-frequency current since has less eddy current losses.

 Disadvantages

• It is a high cost for manufacturing and maintenance.
• it needed regular maintenance and when used for extreme conditions
• It is noisy since the use of cooling fans

Core Type vs. Shell Type: Which is Better?

• The use of transformers based on applications. Core-type transformers are used where high frequency and mechanical stability as well and shell type is used for easy installation and compact configuration.

So, friends, it is a detailed post about the difference between core-type and shell-type transformers. If you have any queries ask in the comments. thanks for reading. Have a good day. Read more theengineeringknowledge.com