what is zero sequence curr
ent ?
Answers were Sorted based on User's Feedback
Answer / 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 |
Answer / chimbu
zero sequence current means what u will get when u will
have ground fault on a three phase system.
Is This Answer Correct ? | 27 Yes | 16 No |
Answer / shankari
there is no sequence at all.they are all in phase with each other
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / thenmozhi r
its refered as the voltage and current is inphase and have
same magnitude.
Is This Answer Correct ? | 4 Yes | 13 No |
why high speed tripping relay is used in protection circuit why not normal relay
what is the difference between LATCH and FLIP FLOP
In Power transformer oil temperature or winding temperature will be high
Why the capacitor are connected in Delta(Three Phase) for power factor improvement ?
Why a transformer Noise during its running condition ?
why are use corona ring in high tension line switchgear?
please tell me the all the spcications of the 100MW 11KV HYDEL POWER PLANT SPECICATIONS
A power transformer 4MVA/11KV/0.415Kv has been out of use in 12years. what maintenance actions/test need to be carried out before energizing.
In CDG type IDMTL realy O/L , E/F, O/C which are used for out going feedrs,on R-phase o/c element, Y-phase , e/f elecment and on b -phase o/c element will be connected . Why the earth fault on center phase only, why not on other two phases?
Upload data by LSMW via BAPI in SAP system.
On monitor it is written that current rating is 2.2 Amps. Is it a monitor current drawing capacity or CPU & monitor. If it is only monitor rating, what will be the rating of only CPU and what will be the power consumption rating of PC, Monitor & Scanner? In net, I learnt that computer consumes only 200-300W while running. With the current rating of 2.2 Amps, how it could be 200-300Watts. Please explain?
IN CONTROL SYSTEMS Y WE NEED TO KNOW THE STABILITY OF THE SYSTEM?WHAT IS ITS PRACTICAL USE?