Interested to Buy Any Domain ? << Click Here >> for more details...
what is the relevance of knee point voltage in protection
and metering grade CT ? and basically what is knee point
voltage ?
- 2 Answers
- 5650 Views
- I also Faced
- E-Mail Answers
Answer Posted / raviteja nowduru
knee point in a transformer is that equipement using maximum
core flux density.v2=(v1/N1)N2.so if v2 is increased by
means of either N1 or by N2.then V2 will increase.but
generally transformer operates at maximum core flux density.
v2=4.44f(BmAi)N2.so Bm will get more.but it is operating at
maximum value .so core gets saturated.core losses will be
incrased and 3rd order harmonics will be induced.
So knee point voltage is that beyond which core gets saturated.
| Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
What are reasond for high wattage in single phase induction motors
there is an alternator 480 k.w, 400v,50hz, 4-wire running on load having leakage alternator body earthed current 38 A. is it within acceptable limit? if yes then give reference if no then how to bring within specified limit
l&t switch FN 63 handle position can we change
what happen as when voltage drop(or may decrease) ? in case of atomic base theory?
There are different classes of protections in power plants.class a,b,c are clear..is there any class d and e r there..and elaborate class b protection.
What is the mechanism of WTI
describe the phenomena of vacuum interruption in C.B
For R-L or R-C ckt,time constant formula is L/R and RC respectively and its unit is in sec.Pls tell me the derivation
does any one know where we can purchase insulation oil for high voltage oil filled cables
Is it advantages of having star-delta vfd than normal star vfd , if yes why?
What is the formula for selecting the cabels according to load? How to calculate what sq.mm cabel to be used?
Explain about 3 phase motor fault current calculation with examples?
Generation of voltage for each phase are same of a turbogenerator.Although the short circuit current flow when two phase of turbogenerator are shorted(where current can't flow without potential difference),why?
Main advantage of auto transformer over two windings transformer is that A it needs no cooling B it uses only one winding C core losses are reduced D it has simple construction
Electrical 'C' license full abbreviation , and full form
