how to calculate knee point voltage of current transformer?
Answer Posted / saleh abdulsalam trabelsi
to calculate knee point voltage of current transformer by
formal
Vknee point = Isecandary(Rct+ Rcable+ Rburden)
where
Rct= resistenc of current transformer
Rcable =resistenc of cable =2Rcable
Rburden =burden of relay
IF Vknee point< manufacture voltage of current transformer
current transformer is good
IF Vknee point> manufacture voltage of current transformer
current transformer must be change
Is This Answer Correct ? | 88 Yes | 47 No |
Post New Answer View All Answers
WHY CBCT USE ONLY IN Y PHASE NOT OTHER PHASES
As a electrical engineer.. what are the basic norms should follow in transformer oil testing.. 1.What is the Electrode type? 2.How long time you will give for oil testing?
Could u pls tell me the NPCIL electrical engineering interview questions for Executive trainee, and also guide me how to face the interview.
HOW MANY TYPES OF FUSE?
how to interlock 3 incomer-ACB,1 buscoupler ACB,... pls answer this question and if possible send me the ckt diagram..haifriends2910@gmail.com
what is cathodic protaction?
Explain the laying procedure and laying depth of submarine/subsea power cable for 220/400KV system? Also available cable diameter?
what is the meaning of 0.5ohm Resistance
Is there a diode made that works with AC 120 volt 20 amp? If so can it completely stop all current flow in 1 direction at all times?
how can check the resistance of battery contact?
what is meant by poly phase induction motor ? how its operating by single phase or three phase?
why should small green grass ans small plant should not be there inside the transformer Yard in the factories
it is possible to measurement of tension of slipring induction motor(SRIM)carbon brushes, any maesuring instruments are available in the markets.
What is PQA???Applications........
What is the function of auadag in a cro?