how we calculate the knee point of a protection and metering
CT and what is the testing procedure.



how we calculate the knee point of a protection and metering CT and what is the testing procedure...

Answer / nur.asidik

knee point voltage is only for protection, not for measurement, it is depend on your protection you need,for example, 87 need higher Vkp than 50/51, just follow your relay requirement. I mean your CT Vkp should higher than Relay required Vkp. refer to IEC, for class 5P or 10P, Vkp is as a function of ALF, Rct, VA, and secondary ratio of CT

Is This Answer Correct ?    0 Yes 1 No

Post New Answer

More Electrical Engineering Interview Questions

Is a d.c.compound motor is use as a booster? how?

0 Answers  


What is multiplying factor of meter if the meter ctr and ptr is open type?

1 Answers  


What different between kw and kva. why maser AC in kva.

3 Answers  


why current is constant on d.c?

0 Answers  


can anybody sent me power grid questions. what subject should i prefer for preparation?

0 Answers   Reliance, Vascon,






after how many spot we must chang secondry cable in portable spot welding gun?

0 Answers  


How to calculate the volumetric capacity of a oxygen & Nitrogen gas Cylinder if pressure is 145 kg/cm2 & water capacity of cylinder is 67 liters.

0 Answers   vssc,


ouestion for the post of section engineer

1 Answers   BSNL, RRB,


How does flights get the neutral(grounding)

1 Answers  


how to calculate KA rating of C.B?explain with Formula.

1 Answers  


what is the full form of FRL (3/20,7/20 EARTH WIRE)..????

3 Answers   Divis Laboratories, Aster, FRL, Gasco,


can a synchronous motor be made to rotate in a clockwise direction ?

1 Answers  






Categories
  • Civil Engineering Interview Questions Civil Engineering (5070)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4442)
  • Electrical Engineering Interview Questions Electrical Engineering (16579)
  • Electronics Communications Interview Questions Electronics Communications (3915)
  • Chemical Engineering Interview Questions Chemical Engineering (1091)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (214)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (258)
  • Instrumentation Interview Questions Instrumentation (2986)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (122)
  • Power Plant Engineering Interview Questions Power Plant Engineering (170)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (0)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1376)