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Electrical safety gen

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Transcript

  • 1. WelcomeWelcome to Safety awareness Electrical Electrical safety awareness ELECTRICAL SAFETY
  • 2. Power DistributionELECTRICAL SAFETY
  • 3. SAFETY TEMINOLOGY Shocks-Results in burn,injury,deaths Flashovers- Results in deaths, fires, damages Faults-Results in arching, explosions and fires Explosions in electrical equipment resulting in damage to installations and deaths Fire hazards resulting in destruction , loss of fire and release of smoke , dust gases etc. ELECTRICAL SAFETY
  • 4. Causes of electrical hazard Exposed live conductors Conductor not discharged Enclosure not earthed Lack of fence and lock Lack of awareness Miscommunication /miss-interpretation Capacitor not discharged Lack of ‘danger sign’. ELECTRICAL SAFETY
  • 5. Contd…. Open cable trench Cable not clamped properly Poor illumination Overloading of electrical gadgets Not using safety belt Internal flash over Protection did not respond. Lightning stroke ELECTRICAL SAFETY
  • 6. Shock level at 50 HzMAGNITUDE OF EffectCURRENTBelow 10 milli Not painfulamperes10mA to 15mA Painful shock15mA to 20 mA Muscle control affected20 mA to 40 mA Breathing affected40mA to 80mA Irregular heart beatAbove 100mA Severe burn, leads to death ELECTRICAL SAFETY
  • 7. Safety device Discharged rod Rubber gloves Rubber shoes Insulation mat Insulation support Insulated pliers/screw driver Goggles/apron ELECTRICAL SAFETY
  • 8. Electrical permit Line clearance for LT Line clearance for HT Height work permit Excavation permit Temporary connection permit Barricading ELECTRICAL SAFETY
  • 9. Tagging Green tag for production Red tag for electrical isolation Tag “MAN AT WORK” Message no for de- enegization Message no for energization ELECTRICAL SAFETY
  • 10. Illumination levelArea Lux level Area Lux levelUnit 50 Conference 1000/CDU/VBU roomFurnace 50 Reading 150 roomPump 50 Dressing 200house tableSubstation 50 Badminton 500Control 300 Canteen 150roomCorridor 70 Road 30Footpath 30 Walk way 15Bed room 100 Inspection 200kitchen 200 Hospital 100 ward ELECTRICAL SAFETY
  • 11. Earthing system Structure earthing Tower earthing Cabinet earthing Equipment earthing Transformer body earthing Transformer neutral earthing Surge arrester earthing Cable rack earthing Fencing/door earthing ELECTRICAL SAFETY
  • 12. HOUSE WIRINGELECTRICAL SAFETY
  • 13. ELECTRICAL SAFETY
  • 14. FUNCTION OF ELCB ELECTRICAL SAFETY
  • 15. FUNCTION OF MCB ELECTRICAL SAFETY
  • 16. Case studyELECTRICAL SAFETY
  • 17. FIRE EXTIGUISHER DCP=dry chemical powder CO2= Carbon di-oxide ELECTRICAL SAFETY
  • 18. Connection by Agency ELECTRICAL SAFETY
  • 19. DB open left after tempering ELECTRICAL SAFETY
  • 20. Tempering by students ELECTRICAL SAFETY
  • 21. Tempering by students ELECTRICAL SAFETY
  • 22. Tempering by studentsELECTRICAL SAFETY
  • 23. .----
  • 24. Thank youELECTRICAL SAFETY