Protection of power

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protection of power system saves man, machine, material

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Protection of power

  1. 1. Protective device Bhagawan Prasad Chartered Engineer amieclub@gmail.com
  2. 2. TYPE OF PROTECTIVE DEVICE  FUSE LOW VOLTAGE  FUSE HIGH VOLTAGE  MCB  ELCB  MCCB  RCCB  SFU  BREAKRS  RTD  THERMOCOUP LE  THEWRMOSTA TE
  3. 3. HT FUSE RATING 11/0.415KV KVA PRIMARY SECONDR Y MIN. FUSE MAX. FUSE 50 2.9 72 6 10 75 4.3 108 10 16 100 5.8 144 16 25 125 7.2 180 16 40 160 9.2 231 16 40 200 11.5 290 25 40 250 14.4 360 32 40 315 18.2 455 40 63 400 23 576 40 63
  4. 4. RTD  MADE OF PLATINUM , NICKEL, COPPER  TEMP- 600 DEGREE
  5. 5. THERMO COUPLE-TEMPERATURE SENSOR  MADE –NICKEL, PLATINUM , COPPER  RATING –UPTO 3000 DEG.
  6. 6. BMR  RATING –a) with CT b) without CT
  7. 7. THERMOSTAT  RATING-5A
  8. 8. Relay  Thermal over load relay  Over current relay  Under voltage relay  Frequency relay  Earth fault relay  Buchholz relay  Master trip  Auxiliary relay  OTI
  9. 9. MOTOR PROTECTION UPTO 55KW  SHORT CIRCUIT PROTECTION BY FUSE  SINGLE PHASING PROTECTION  THERMAL OVER LOAD  WINDING TEMPERATURE PROTECTION
  10. 10. MOTOR PROTECTION 55-200 KW  SHORT CIRCUIT PROTECTION BY FUSE  SINGLE PHASING PROTECTION  THERMAL OVER LOAD  WINDING TEMPERATURE PROTECTION  STALLED ROTOR
  11. 11. PROTECTION OF HT MOTOR  SHORT CIRCUIT PROTECTION BY FUSE/BREAKER  SINGLE PHASING PROTECTION  THERMAL OVER LOAD  WINDING TEMPERATURE PROTECTION  STALLED ROTOR  UNDER VOLTAGE  BEARINGOVER TEMPERATURE  DIFFERENTIAL PROTECTION  PHASE REVERSAL
  12. 12. Transformer rating  25,40,63,100  150,250,300,  400,500,630,750,  1000,1250,1600,  2000,2500  150,250,300,  400,500,630,750 ,  1000,1250,1600,  2000,2500 Distribution Power
  13. 13. PROTECTION OF DISTRIBUTION TRANSFORMER  Over current protection  Earth fault protection  Buchholz relay  OTI  WTI  Low oil level
  14. 14. PROTECTION OF POWER TRANSFORMER  Over current protection  Earth fault protection  Buchholz relay  OTI  WTI  Low oil level  Differential protection  Over fluxing
  15. 15. CABLE PROTECTION O/C +E/F (CDG31) Feeder differential
  16. 16. Busbars  Differential protection (CAG34)
  17. 17. Outgoing feeders from 11KV SWBD  Differential (HORM-4)  O/C +E/F (CDAG 51)
  18. 18. RESSTRICTED EARTH FAULT RELAY
  19. 19. BIMETALIC =BMR
  20. 20. BUCHHOLZ RELAY
  21. 21. MASTER TRIP
  22. 22. ACT FAST AND INITIATE FIRST  बड़ा    सोचो         तेजी से सोचो व     सबसे पहले सोचो  िवचारो     पर िकसी का       एकािधकार नही होता.   ----  धीरभाई अमबानी
  23. 23. THANK YOU

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