Possible cause of electrical failure

Due to the gap or deviation during the electrical operation and maintenance electrical failure takes places and sometimes it becomes so fatal.

 a) Safety

1) Not using PPE

possible cause of electrical failure 

2) Poor lighting 

 3) In/exit path missing

 4) Using non-standard tools 

5) Not using LOTO

 6) Wrong tag marking 

7) In sufficient fire detector, fire extinguisher 8) Improper SOP for energization/de-energization 

  b) Monitoring issue 

 9) Irregularity in in taking reading 

 10) Relay failure

 11) Irregularity in PM

 12) Time coordination with up stream

 13) Setting coordination with up stream 

14) Numerous alarm 

15) Irregularity in in taking reading of UPS, Battery charger 

16) High temperature in VFD/UPS room 

  c) Marking on panel

17) Feeder cubical name 

 18) Rating 19) Fuse rating 

20) Cable size 

 21) Special marking 

  d) Functional 

22) non availability of emergency light for power restoration 

 23) Auto failure of bus coupler 

 24) Spare short fall 

 25) Non availability of testing equipment 

 26) ill weather 

27) poor maintenance

  e) Fire Hazard 

 28) flammable material in cable cellar 

 29) Non FLP equipment in battery room

 30) Improper spacing of fire extinguisher 

 31) Hydrocarbon ingress in substation 

 32) Failure of insulation

  f) Furious tripping 

 33) Wrong relay setting 

 34) Wrong operation 

 35) Wrong sequence of operation 

 36) Wrong control circuit 

 37) Breaker failure 

 38) Poor scheme 

 39) Poor design 

  g) Flashover 

 40) Failure of end termination 4

1) Lizard entry

 42) Unwanted light on at night 

 43) Aging of equipment 

 44) CT/PT failure 

 45) Water ingress in JB/DB 

 46) Rodent entry

 47) Moisture ingress

 48) Poor ventilation 

 49) Fire in capacitor of AC 

  h) Knowledge gap 

 50) Lack of training 

 51) Lack of knowledge 

 52) Improper monitoring