Answer Posted / ayush chamoli
according to fortescue- unbalanced 3 phase voltage nd
current(during fault) r made up of three symmetrical
component having positive,negative nd zero sequence.
zero sequence-when all the symmetrical components r in
phase nd hve same magnitude.
+ve sequence- when symmetrical components r in 120 degree
phase wrt to each other nd hve same phase sequence as
supply voltage.
-ve sequence-when components hve 120 degree phase wrt each
other nd hve opposite phase sequence compared to supply
voltage(3-phase).
for 3phase(symetrical or balanced fault)- only +ve sequence
exist while zero nd -ve sequence r zero.
LG fault all sequences r equal.
LL fault-only + nd -ve sequence(as no ground thats why no
zero sequence).
LLG fault-all sequences nd hve different values.
| Is This Answer Correct ? | 67 Yes | 5 No |
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