Question
Download Solution PDFWhich of the following is NOT an advantage of shell type transformers over core type transformers?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is option 4.
The dismantling of a shell-type transformer for maintenance is relatively difficult compared to core-type transformers, hence maintenance of shell type of transformer is difficult.
Difference between core and shell type transformer:
|
Transformer |
Core Type |
Shell Type |
|
Construction |
A core-type transformer consists of two limbs and two yokes. |
A shell-type transformer consists of three limbs and two yokes. |
|
Cross section of core |
The cross-section of the core of a core-type transformer may be square, cruciform two-stepped or three-stepped |
The cross-section of the core of a shell-type transformer is rectangular |
|
Number of magnetic circuits |
single magnetic circuit |
two magnetic circuits |
|
Type of winding |
concentric winding (or cylindrical winding) |
sandwich winding (or interleaved winding or disc winding) |
|
Losses |
More core and copper loss |
Less core and copper loss |
|
Repair and maintenance |
can be easily dismantled for repair and maintenance |
Dismantling for maintenance is relatively difficult |
|
Conductor material |
requires more conductor material for windings |
requires less winding conductor material |
|
Mechanical Strength |
Low |
High |
|
Application |
used for high voltage and high power applications |
preferred for low voltage and low power applications |
Last updated on Jun 16, 2025
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