A SEMINAR PRESENTATION ON PRACTICAL TRAINING AT SWASTIK COPPER (P) LTD JAIPUR By:

1. A SEMINAR PRESENTATIONON PRACTICAL TRAININGATSWASTIK COPPER (P) LTDJAIPUR By: Abhinav Soni Electrical Engineering

2. ABOUT COMPANY • SERVICE • PCB Oil analysis • Samples drawn in your yard by our technicians. • On site drainage of PCB contaminated transformers. • Laboratory testing is Ontario hydro approved. • Using the most modern equipmaent we offer these services :one hour emergency,overnight,

3. standard lead times. • Repair • All repairs are completely tested and painted. • Minor repairs-20% cost of new. • Major repairs and rewinds-50% to 70% of new. • Update to current specs.

4. Field service • Minor repair. • AMP reading. • Pole marking. • Vault sampling. • Pad mount painting. • Update of transformer data.

5. PRODUCTS:- Range of product includes power transformers up to 100 MVA,220 KV class. • The transformers are manufactured according to application as detailed under:- • Distribution transformer. • General transformers. • Unit auxiliary transformers.

6. Station auxiliary transformers. • Network transformers. • We also manufacture transformers for special applications as listed below:- • Double ratio transformers. • Auto transformers. • Motor starting transformers.

7. QUALITY CONTROL Quality systems existing at Swastik copper company comply with the requirement of International standard system and have been certified by British Standard Institution(BSI). It is an ISO 9002 certified company.The effectiveness of quality system is reviewed by the top management regularly.

8. Transformers Very large three-phase network transformer.

9. TRANSFORMER CONSTRUCTION The constructional details consist of following section : • Core cutting. • Conductor plant. • Radiator plant. • Winding section. • Core assembling.

10. Tank fabrication. • Tanking. • Testing. • Painting • Finishing.

11. Transformer electromagnetic device (mutual induction) 1. components: -- 2 adjacent coils -- coils not physically connected to each other

12. N N N S S S S S S N N N Transformer (cont.) 2. operation: a) AC in primary coil produces DB b) Secondary coil receives a D in I & V

13. TYPES OF TRANSFORMER

14. Transformers Wye / Wye connection

15. Transformers Three-phase network supplies a load through a transformer. Equivalent circuit of the wye-wye Single-phase equivalent circuit for phase A of the three-phase wye-wye transformer system

16. Wye / Delta connection

17. Transformers Wye-delta connected transformer

18. Transformers Single-phase equivalent circuit of a wye-delta transformer.

19. Delta / Wye connection

20. Delta / Delta connection

21. Transformers Three-phase Transformer Relations

22. Transformer Turns Ratio • ratio of the # of turns in the secondary coil to the # of turns in the primary coil • numerical factor indicating relative change in PD across a transformer • TR > 1 = éV (step up) • TR < 1 = êV (step down)

23. Transformer Law(change in voltage in a transformer) • Din V is directly proportional to the ratio of the # of turns in the secondary to the # of turns in the primary • Formula: • NS secondary coil turns NP primary coil turns • VS secondary voltage • VP primary voltage • direct relationship

24. Transformer Current • Current in a transformer will be inversely proportional to the TR of the transformer • formula: IP primary coil current IS secondary coil current • I vs. V = inverse relationship

25. Types of Transformers • Based on TURNS RATIO • 1. step-up • turns ratio > 1 • VS>VP • IS<IP • 2. step-down • turns ratio < 1 • VS <VP • IS>IP

26. Transformer Types (cont.)Based on STRUCTURE OF COILS 1. air core -- inside area of coil is empty -- inefficient induction 2. open core -- ferromagnetic material inside coils -- B = induction

27. Transformer Types (cont.) 3. closed core -- ferromagnetic ends connected -- ­B = ­ induction 4. shell -- lazy square eight -- overlap of coils on same ferromagnetic core

28. CONCLUSION Thanking you, Abhinav soni, EE Branch.