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Which is a Symmetrical type of fault?

Which is a Symmetrical type of fault? Correct Answer line to line to line to ground (L-L-L-G) fault

Symmetrical faults:

  • A symmetrical fault is a fault where all phases are affected so that the system remains balanced
  • A three-phase fault is a symmetrical fault
  • As symmetrical faults result in balanced conditions, they may be analyzed using per-phase analysis
  • LLLG fault is symmetrical fault

 

Unsymmetrical Faults:

  • Unsymmetrical faults are the faults that lead unequal currents with unequal phase shifts in a three-phase system
  • The unsymmetrical fault occurs in a system due to the presence of an open circuit or short circuit of transmission or distribution line
  • It can occur either by natural disturbances or by manual errors
  • The natural disturbances are heavy wind speed, ice loading on the lines, lightning strikes and other natural disasters.
  • LG, LL, LLG faults are asymmetrical faults.

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