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1. Vocational Training Report AT C.S.E.B bhilai 03 rd june - 02 nd july S.S.T.C. Electrical Engineering presented by:- kulranjan minj roll no. :- 16 5 th semester 31/08/2016

2. ACKNOWLEDGEMENT I feel great pleasure on my vocational training report on  CHHATTISGARH STATE POWER DISTRIBUTION COMPANY LTD. Bhilai . I am very thankful to my training officer who gave me this opportunity to undergo vocational training and supporting my practical background knowledge fortunately. I express my sincere gratitude to for supporting me to complete my vocational training . 31/08/2016

3. Index CHHATTISGARH STATE POWER companies Substations Transformers Isolators Insulators Capacitor bank Protection of substation Substation Earthing Conclusion 31/08/2016

4. CHHATTISGARH STATE POWER COMPANIES Chhattisgarh State Electricity Board has been reorganized into five companies :- CHHATTISGARH STATE POWER HOLDING COMPANY LTD . CHHATTISGARH STATE POWER GENERATION COMPANY LTD . CHHATTISGARH STATE POWER TRANSMISSION COMPANY LTD . CHHATTISGARH STATE POWER DISTRIBUTION COMPANY LTD .   CHHATTISGARH STATE POWER TRADING COMPANY LTD. 31/08/2016

5. 33/11 kV substation In this substation there is one 33kV input supply coming from BHILAI 3. Here 33 kV is step downed to 11kV which is then send to 2 various different areas like Jamul, Kedamara , etc.   This substation joins the transmission system to the primary distribution system and plays a vital role in supplying electricity to our city. 31/08/2016

6. 33/11kV SUBSTATION 31/08/2016

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8. Components of a Substation   Power Transformer Current Transformer Voltage Transformer Insulator   Earthing system Isolator Switches Circuit breakers Surge arrestor   Switchgear Relay 31/08/2016

9. TRANSFORMERS Transformer is a static machine, which transforms the potential of alternating current at same frequency. TYPES OF TRANSFORMERS Power Transformer Instrumental Transformer 1. current transformer 2. potential transformer On the basis of working 1. step up 2. step down Distribution transformer 31/08/2016

10. ISOLATERS A disconnector , disconnect switch or isolator switch is used to ensure that an electrical circuit is completely de-energized for service or maintenance. High-voltage isolation switches are used in electrical substations to allow isolation of apparatus such as circuit breakers , transformers, and transmission lines, for maintenance. 31/08/2016

11. CAPACITOR BANK The load on the power system being high during morning and evening which increases the magnetization current. This results in the decreased power factor. additional losses. power factor as close to unity as possible. One of such device can be capacitor bank. Main functions of Capacitor Bank are:- Supply Reactive Power Improve Terminal Voltage Improve Power Factor 31/08/2016

12. INSULATORS An electrical insulator is a material whose internal electric charges do not flow freely, and therefore make it very hard to conduct an electric current under the influence of an electric field . TYPES:- Pin type voltages up to 33 kV Suspension insulators voltages greater than 33 kV 31/08/2016

13. VACUUM CIRCUIT BREAKER Vacuum circuit breaker is a type of breaker where the arc quenching take place in vacuum. The technology is suitable for the medium voltage application. Vacuum circuit breaker is use in the voltage range up to 3kv to 38kv.This breaker fast in operation and maintenance free. 31/08/2016

14. TRANSFORMER COOLING Air natural cooling Oil natural cooling 31/08/2016

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16. CONCLUSION electricity plays an important role in our life. know about the various parts of substations how distribution is done in various parts of Chhattisgarh . protective measures to protect the substations Chhattisgarh State Power Distribution Company Ltd. takes such steps so that a uniform and stable supply of electricity can reach in every part of this state. 31/08/2016

17. THANK YOU 31/08/2016