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 core and shell-type transformer are that in core type transformer winding is wounded on the core and in shell type transformer core cover the winding mean core encircles the winding.
In today’s post, we will have a detailed look at both core and shell types of transformer do comparison between them to find their differences. So let’s get started with 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 ceratin distance apart from each other.
- It needed a large quantity of copper so it is expensive
- The transformer core has 2 numbers of limbs and primary and secondary winding ar wounded on them
- It can be created and design 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 from it
- Ther is just single circuit exit in this transformer
Shell Type Transformer
- In this type of transformer, the winding is lies at the central arm that 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 make 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 structure known as yokes and these limbs comes with winding that structure is called core type transformer and shell 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 transformer has magnetic core around the windings
- In a core transformer, U and I shaped core 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 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 easy 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 transformer are used of low voltage and low power
Related Posts: Transformer Symbols
Shell-type transformers Applications
Shell-type transformers’ main applications are explained here
- Commercial buildings
- Residential complexes
- Hospitals
- Lighting systems
- Control and automation systems
Core type Transformer Advantages and Disadvantages
Core-type transformers have many advantages, explained here
- High efficiency
- Low magnetic leakage
- Robust construction
- Best for high-voltage applications
However, they also have some disadvantages, which are
- Large size and weight
- Higher cost compared to shell-type transformers
- Limited flexibility in design and construction
Core Type vs Shell Type Transformer
| Factors | Core Type Transformer | Shell Type Transformer |
|---|---|---|
| Construction | Both windings are surrounded by the magnetic core | Separate windings placed around the core |
| Design | Bulkier and heavier | Compact and less weight |
| Magnetic Leakage | less leakage | High leakage |
| Efficiency | High efficiency | Less efficiency |
| Cost | High cost | Less cost |
| Size | Larger size | Small size |
| Cooling Requirements | io need efficient cooling | it needs less cooling requirements |
| Flexibility | Limited flexibility in design and construction | More flexibility in design and construction |
| Power Losses | Fewer power losses | High power losses |
| Voltage Applications | Best for high voltage applications | Good for low and medium-voltage applications |
| Industries | Power transmission, heavy industries | Residential, commercial, and light industrial sectors |
| Load Capacity | High load capacity | Moderate load capacity |
| Maintenance | It needs more maintenance | it need less maintenance |
| Power Distribution Networks | Commonly used in power distribution networks | Less commonly used in power distribution networks |
| Noise Level | Higher noise level | Lower noise level |
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
