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Gas Insulated Transformer (2)

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This seminar report discusses gas insulated transformers, which use sulfur hexafluoride (SF6) gas instead of oil as both an insulating and cooling agent. SF6 has excellent dielectric and cooling properties and is nonflammable, nontoxic, and recyclable. Gas insulated transformers are advantageous as they have a smaller footprint, higher reliability, and cause no pollution. They are suitable for applications like hospitals and underground facilities where fire safety is important. The report outlines the features, layout, cooling apparatus, and accessories of gas insulated transformers and concludes that ongoing research is improving their efficiency and making power systems more reliable and safe.

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SEMINAR REPORT ON GAS INSULATED TRANSFORMER
SF6 GAS INSULATED TRANSFORMER EMPLOYS SF6 GAS INSTEAD OF THE CONVENTIONAL OIL BOTH AS AN INSULATING AND COOLING AGENT.
CONTENTS SF6---AN OVERVIEW APPLICATIONS OF A GAS INSULATED TRANSFORMER FEATURES OF A GAS INSULATED TRANSFORMER LAYOUT COOLING APPARATUS OF A GAS INSULATED TRANSFORMER IMPORTANT ACCESSORIES CONCLUSION
SF6 AN OVERVIEW SF6 is Sulphur hexafluoride formed by chemical reaction of molten sulphur and fluorine. It is colorless, odorless, nonflammable, non- corrosive and chemically stable. High dielectric strength. Quenches arc effectively and has excellent cooling properties. Good thermal conductivity and excellent thermal stability. Its not poisonous and eco-friendly. It can be recycled.
APPLICATIONS OF SF6 GAS INSULATED TRANSFORMER Hospitals, underground shopping centers, substations where a high level of fire safety is required. Water treatment plants and hydroelectric power plants where waterways must be kept unpolluted. Thermal power plants, chemical plants, public works facilities etc where high reliability is required.
FEATURES OF A GAS INSULATED TRANSFORMER Highly flame resistant and non explosive. High resistance to moisture. Reduced installation space. High reliability. Causes no pollution. Explosion proof tank. Easy inspection and maintenance work.
LAYOUT OF A GAS INSULATED TRANSFORMER
Pressure rise on internal fault
CONSTRUCTIONAL FEATURES Constructional Features Oil Immersed Transformer (OIT) Gas Insulated Transformer (GIT) Insulation/Cooling Insulating Oil SF6 (Pressure 0.14 or 0.43MPa-g) Solid Insulation Material Oil Impregnated Paper, Pressboard PET Film, PPS Film, Aramide Paper, Pressboard Conservator Necessary Unnecessary On Load Tap Changer Arcing Switching in Oil Vacuum Interrupter
COOLING APPATARTUS Employs a cooling medium in liquid phase such as a Refrigerant R113 otherwise known as Trifluorotrichloroethane or C2F3Cl3. SF6 gas is obviously used as the second cooling medium.
IMPORTANT ACCESSORIES DIAL THERMOMETER PRESSURE GAUGE TEMPERATURE COMPENSATING PRESSURE SWITCH
CONCLUSION Incessant research and continuous developments have made construction of large capacity gas insulated transformer possible. With the eco-friendly aspects of SF6 gas and considering the huge advantages of the gas, long strides can be made in this regard to further utilize it and increase the efficiency of the transformer and making the power system more reliable and safer.
Thank you for a very patient hearing.

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Gas Insulated Transformer (2)

  • 2. SF6 GAS INSULATED TRANSFORMER EMPLOYS SF6 GAS INSTEAD OF THE CONVENTIONAL OIL BOTH AS AN INSULATING AND COOLING AGENT.
  • 3. CONTENTS SF6---AN OVERVIEW APPLICATIONS OF A GAS INSULATED TRANSFORMER FEATURES OF A GAS INSULATED TRANSFORMER LAYOUT COOLING APPARATUS OF A GAS INSULATED TRANSFORMER IMPORTANT ACCESSORIES CONCLUSION
  • 4. SF6 AN OVERVIEW SF6 is Sulphur hexafluoride formed by chemical reaction of molten sulphur and fluorine. It is colorless, odorless, nonflammable, non- corrosive and chemically stable. High dielectric strength. Quenches arc effectively and has excellent cooling properties. Good thermal conductivity and excellent thermal stability. Its not poisonous and eco-friendly. It can be recycled.
  • 5. APPLICATIONS OF SF6 GAS INSULATED TRANSFORMER Hospitals, underground shopping centers, substations where a high level of fire safety is required. Water treatment plants and hydroelectric power plants where waterways must be kept unpolluted. Thermal power plants, chemical plants, public works facilities etc where high reliability is required.
  • 6. FEATURES OF A GAS INSULATED TRANSFORMER Highly flame resistant and non explosive. High resistance to moisture. Reduced installation space. High reliability. Causes no pollution. Explosion proof tank. Easy inspection and maintenance work.
  • 7. LAYOUT OF A GAS INSULATED TRANSFORMER
  • 8. Pressure rise on internal fault
  • 9. CONSTRUCTIONAL FEATURES Constructional Features Oil Immersed Transformer (OIT) Gas Insulated Transformer (GIT) Insulation/Cooling Insulating Oil SF6 (Pressure 0.14 or 0.43MPa-g) Solid Insulation Material Oil Impregnated Paper, Pressboard PET Film, PPS Film, Aramide Paper, Pressboard Conservator Necessary Unnecessary On Load Tap Changer Arcing Switching in Oil Vacuum Interrupter
  • 10. COOLING APPATARTUS Employs a cooling medium in liquid phase such as a Refrigerant R113 otherwise known as Trifluorotrichloroethane or C2F3Cl3. SF6 gas is obviously used as the second cooling medium.
  • 11. IMPORTANT ACCESSORIES DIAL THERMOMETER PRESSURE GAUGE TEMPERATURE COMPENSATING PRESSURE SWITCH
  • 12. CONCLUSION Incessant research and continuous developments have made construction of large capacity gas insulated transformer possible. With the eco-friendly aspects of SF6 gas and considering the huge advantages of the gas, long strides can be made in this regard to further utilize it and increase the efficiency of the transformer and making the power system more reliable and safer.
  • 13. Thank you for a very patient hearing.