Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / naresh
when ever there is a fault the current value increases........
the fault is a sub transient condition.....
the reactance offered during first few cycles of faulty
condition the reactance is very less(bcoz in alternator all
three winding's damper,field& armature are connected in
parallel )and the fault current is more..........
after few cycles the current level decreases(bcoz out of
these winding's damper winding cut's off due to lesser time
constant, now field& armature are connected in parallel) due
to increase in reactance this reactance is called transient
reactance.......
after few cycles the field winding cut's off due to lesser
time constant and only the armature winding is present, this
reactance is steady state reactance.........
steady state X > transient X > sub transient X
| Is This Answer Correct ? | 7 Yes | 0 No |
Post New Answer View All Answers
Pl.brief me any electrical major fault you have rectified.
how hazordious area is classified at an oil & gas plant and categorise suitable class of electric equipment in that area like induction motors, LCS, Lighting Fixtures Fluerescent/Flood lights Mercury& sodium lights, J.Bs, Power Cables etc
What is FTA card? How it works?
what is the total power generation in india?
sir i have cleared the apti test of EIL held on 15th march and my interview will be in new delhi on 2nd june.i will be very much helpful if u help me regarding the type of interview questions comes at EIL.(URGENT.........PLZZZZZZZZZZ...............)
What is meant by control system?
how to measure dc earth leakage current?
Why Utility Distribution System in India is mainly at 11 kV? Why not Utility go for 33 kV?
How does a transformer contribute towards the widespread popularity of ac system over dc?
What happens if we connect a single phase energy meter in reverse polarity.
11kv/433v delta/star distribution transformer primary side full load Ht current is 83.33A in , but input side VCB rating 800A.why?
Can we test the alignment of End shield and stator of turbogenerator without rotor insertion? Also how to fix maintain the alignment at site installation?
Why are lt windings placed near the core?
1. Why is the speed of shunt motor practically constant? 2. Why dc series motor use to start with heavy loads? 3. advantages & disadvantages of separately excited generator over self excited generator?
List the power rating of any 5 important electrical appliances used in houses.
