21. What is the purpose of taking Capacitance and Tan Delta
22. What are the protections to be used for Generator?
23. Draw the vector diagram and condition for the
following: 1) Dyn1
2) Ynd0 3) YnYn0
24. What happens when the polarity changes in CT? Explain
25. Explain the Term in CT Name Plate – Class: 5P10
Answers were Sorted based on User's Feedback
Answer / raul
-it is done for insulation testing i.e. to measure the loss
-merz price circulating current scheme (i.e. differential
protection), balanced earth fault protection, protection
against unbalanced loading which leads to negative sequence
-not possible to draw in this format........
-no change will occur if the polarity is changed bcoz it is
independent of the polarity
-class 5 and VA rating is : 10
|Is This Answer Correct ?||0 Yes||0 No|
Answer / naresh
Pole slipping,backup protection,differential,dead machine
protection,low forward power,voltage control over
current,current control over voltage,df/dt,if ct polarity
chenge in protection reverse active power flows to relay
and diff current flow and in metering import power wil show
in energy meter,for five times of primary current 10%
|Is This Answer Correct ?||0 Yes||7 No|
Three phase star connected PT transformer primary side one phase fuse is blown what will be the output in secondary side(Secondary side also three phase star connected)
I have 1500KVA transformer ,How much Maximum KW Load is allowed?
What is the difference between KV,KVAR,KVA,KW?
why genarator genarating voltage 11 KV?
Why HRG and LRG used beside transformer, what is the purpose
Is there any thumb rule for cable selection for any current rating ?
how we sesign the transformer give some specifion regarding design of transformers
What does quality factor depend on in resonance?
IN TWO WATTMETER METHOD WE GOT W1,W2,WE KNOW V.HOW TO FIND Q????????????
what will be happen if earth point is being used for as a neutral point for raw power , and same will be used for ups earthing
what is recovery voltage & transient voltage ?
Advantages/Disadvantages of earthing of neutral bus on MSB instead of separate neutral earthing for transformer/DG sets feeding to MSB