A transformer is a static device. The primary and secondary windings of oil filled transformers are made with aluminium or electrolytic copper.

1. 6th
Sem
Electrical Engineering Department
Batch – B1 (2014 Batch)
Abhishek Choksi
(140120109005)
Design of DC Machines & Transformer (2160912)
ALA Presentation
On
“ Design of LV Winding ”
Prepared By: Guided By:
Prof. Jaimini Gohel
Gandhinagar Institute Of Technology

2. L.V. Winding
• A transformer is a static device.
• The primary and secondary windings of oil filled transformers are
made with aluminium or electrolytic copper.

3. • The main reason behind the LV winding placed nearer to core is the
heat which is proportional to the copper losses occurring in the wires
or winding.
• This heat produced is larger in High Voltage winding than in Low
Voltage winding so for the heat to travel outside the transformer and
to avoid the damage to the transformer the high voltage winding is
placed outside the low voltage winding so that more heat flows outside
the transformer easily.
• If HV winding is placed inside LV winding then heat produced the
Core and LV winding will burn.

4. Design

7. • The choice of current density depends on the allowable temperature
rise, copper loss and method of cooling.
• After finding the cross section area of LV conductor , the dimension of
conductor are selected as per IS table of copper conductors.

8. Reference
• Wikipedia - https://en.wikipedia.org/wiki/Transformer
• [V.K. Mehta] - electrical machine design
• AK sawhney - electrical machine design
• Aditya-design-of-transformers
• SPX TRANSFORMER SOLUTIONS, INC.
• ABB - http://www.abb.com/transformers
• Minnesota Power Systems Conference November 3 5, 2009 Earl‐
Brown Heritage Center University of Minnesota