How to calculate VCB current rating for 2000 KVA transformer



How to calculate VCB current rating for 2000 KVA transformer..

Answer / k. kannan

Power=1.732*415*I
I =2000000/1.732*415
I=2782.5 amps

Vcb =I=2000000/1.732*11000
I=104.97 amps=I=105 A


Suitable VCB 125 AMPS

Is This Answer Correct ?    7 Yes 16 No

Post New Answer

More Electrical Engineering Interview Questions

What are the necessary solutions needed to be carried out on a malfunctioned earthing mechanism of a VACUUM CIRCUIT BREAKER.(TAMCO)

1 Answers  


What is phase angle? and what is importance to measure it?

2 Answers  


What is servo lock in CNC how they work and if any parameter for them in CNC machine

1 Answers  


What is ht lt switchgear.

3 Answers   Bhel, HBL Power Systems,


Why is the electric shock from the DC supply is more dangerous than the shock from AC supply.

8 Answers   IBM,


A 1F capacitor is charged to 100V initially. A 1H inductor is connected accros the capacitor througha a switch. The current in the circiut when the switch is closed is____

1 Answers   Ecil, L&T,


why battery room in substation is black coloured?

4 Answers  


how can we test the vector group of transformer

1 Answers  


what is the working principle of energy saver control panel. please give the complete calculation & theory.

1 Answers   Lupin,


what is destructive and non-destructive testing of welding

1 Answers  


in 11kv generators the neutral point is connected to earth via earth coil while in the 33 / 11 kv transformer the neutral point is connected to earth via earth resistor why? 

1 Answers  


is there any phase difference occurs while primary and secondary side mutual induction occurs?

1 Answers  


Categories
  • Civil Engineering Interview Questions Civil Engineering (5086)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4453)
  • Electrical Engineering Interview Questions Electrical Engineering (16638)
  • Electronics Communications Interview Questions Electronics Communications (3918)
  • Chemical Engineering Interview Questions Chemical Engineering (1095)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (239)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (259)
  • Instrumentation Interview Questions Instrumentation (3014)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (124)
  • Power Plant Engineering Interview Questions Power Plant Engineering (172)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (25)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1379)