Difference between core type and shell type transformer | Comparison of core type and shell type transformers

Sr. No.	Core Type Transformer	Shell Type Transformer
1.	LV winding and HV windings are wound on the two limbs of the core and HV winding is placed on LV winding this type of arrangement is known as core type transformer.	LV winding and HV windings are wound on the central limb of the core and HV winding is placed on LV winding this type of arrangement is known as shell type transformer.
2.	HV winding and LV windings are normally distributed over two opposite limbs of core.	LV and HV windings are wound on the central limb of the core.
3.	Cylindrical type windings are used.	Sandwich type windings are used.
4.	Core has two limbs.	Core has three limbs.
5.	It has single magnetic circuit.	It has two magnetic circuit.
6.	Core is either circular or rectangular.	Core is either rectangular or cylindrical or spiral.
7.	More suitable for supplying power at high voltage and low current.	More suitable for supplying power at low voltage and high current.
8.	The coils can be easily withdrawn for repair. (due to windings are outside of core.)	The coils can not be easily withdrawn for repair. (Due to windings are surrounded by core.)
9.	Easy in design and construction point of view.	Comparatively complex construction and design.
10.	Natural cooling is more effective.	Natural cooling is poor. (Due to windings are surrounded by core.)
11.	Mechanical protection of winding is less.	Better mechanical protection to the windings.