CONSTRUCTION of TRANSFORMERS Construction of Transformers In order

CONSTRUCTION of TRANSFORMERS

Construction of Transformers In order to approach the characteristics of an ideal transformer the following design features are used, 1. Core is made up of thin sheet of silicon steel laminations to reduce eddy current loss and hysteresis loss 2. One half of each winding on one limb to ensure tight coupling, structural symmetry 3. Windings are made up off usually copper wires, and winding resistance must be less

Construction of Transformers Depending upon the manner in which primary and secondary are wound on the core transformers are two types 1. Core type transformer 2. Shell type transformer

Construction of Transformers 1. Core type transformer Ø Half of each winding in one limb and other half on other limb Ø LV wound below the HV to reduce insulation and mechanical consideration Ø core is surrounding by winding

Construction of Transformers 1. Core type transformer Ø L shaped strips are used

Construction of Transformers 1. Core type transformer Ø L shaped strips are used

Construction of Transformers 1. Core type transformer Ø L shaped strips are used

Construction of Transformers 1. Shell type transformer Ø Both windings are wound in central limb Ø LV wound below the HV to reduce insulation and mechanical consideration and it also near the core Ø Winding is surrounding by core Ø E or F shaped strips are used

Construction of Transformers 1. Shell typetransformer Ø Both windings are wound in central limb Ø E or F shaped strips are used

Construction of Transformers 1. Shell transformer Ø Both windings are wound in central limb Ø E or F shaped strips are used

Construction of Transformers Depending upon the manner in which primary and secondary are wound on the core transformers are two types Core type transformer used high voltage Shell type transformer used low voltage