Why two main buses and one transfer bus scheme not using
for 400kV switchyard
Answer Posted / jkrocks
DMT scheme is used earlier in 400kV System but all new 400kv ss are made on one & half breaker scheme. it has many advantages over DMT scheme.
more reliable than DMT each time line or ICT remain connected through both buses I & II, reduces numbers of confusing isolator in system, reduce additional bus.
If one bus trip due to any fault , lines are transformer connected to that bus remains charged through another bus by means of Tie CB.
Only disadvantage is that this system require three breaker for 2 lines or transformer.
But It is nothing against lots of advantages of One & Half Breaker Scheme.
Is This Answer Correct ? | 2 Yes | 0 No |
Post New Answer View All Answers
if a.c supply is given to the motor,, what happen?
What is referred to the electron in the outer orbit?
What are the main advantages of bode plot?
How to Decide(calculate) Bush bar size for copper and aluminiam ?
What happens if we run alternator on under frequency?
What are merits & De-merits of State-Space Method? What is series programming, parallel programming, general programming & direct programming ? And, difference between these programmings Techniques ?
Differentiate between ideal and non-ideal voltage sources?
excitation limit of an excitor
ult of expression 'document.FrmQF.myem
Why are the cores of large transformers built up of circular transactions ?
is it possible to have dc motors on single chip
tell me about eletrical contractor
Explain cos(theta) and Sin(theta)
can we choose current transformer secondary, to calculate residual flux in a power transformer, so as its saturation is close to the saturation level of power transformer?
What is mean by hot and cold loop testing? What is the difference between them?