Why use the VCB at High Transmission System ? Why can't use
ACB? Pls explain the ans.




Answers were Sorted based on User's Feedback



Why use the VCB at High Transmission System ? Why can't use ACB? Pls explain the ans...

Answer / s syed mohamed

Actually the thing is vacuum has high arc queching property
compare than air .becoz in VCB ,the die electric strength
is equal to 8 times of air . That y always vaccum used as in
HT breaker and air used as in LT in these breakers employ
with high resistance intruption principle.

Is This Answer Correct ?    39 Yes 1 No

Why use the VCB at High Transmission System ? Why can't use ACB? Pls explain the ans...

Answer / g.ravikanth

vcb means "vaccume" at higher potential there is a chance
of ionization of air molecules but if it is vaccume there
is no chance at all for ionization.

Is This Answer Correct ?    31 Yes 5 No

Why use the VCB at High Transmission System ? Why can't use ACB? Pls explain the ans...

Answer / er. ankush miglani 9718151073

at high voltages the air may get ionized but the vaccum
doesnt. so dats why..........

Is This Answer Correct ?    10 Yes 4 No




Why use the VCB at High Transmission System ? Why can't use ACB? Pls explain the ans...

Answer / reddy

VCB provides more insuklation strength than ACB ... ACB
upto 132kV

Is This Answer Correct ?    8 Yes 9 No

Why use the VCB at High Transmission System ? Why can't use ACB? Pls explain the ans...

Answer / rajesh dhankar

i'm sorry to say that above two answer give above are half
correct. because all u r talking about ionized air if u ever
open Chamber where CT's and PT's are connected u will find
distance less than a hand away and there is no problem of
ionized air there.
The main reason after that is at a time of breaking a ckt or
can say shutting down a ckt when load is not completely zero
there can be big damage or accident because of higher
voltage rather if load is completely zero then there is no
problem.
and ACB are used in low tension line where low voltage and
higher load can be controlled.

Is This Answer Correct ?    3 Yes 5 No

Post New Answer



More Electrical Engineering Interview Questions

How many safety of Disel Generator

5 Answers   Sail,


Why no-load primary current is very small as compared to full load current in transformer (as 1% of full load current?

5 Answers   NTPC,


Which are Electrical componet and Electronics componet??

2 Answers   KarMic,


what is the sweep commenly used 1200mm sweep and 600mmsweep please tell me breifly sweep

1 Answers   Khaitan,


How to take of Transformer oil Break down voltage test?

2 Answers  






How halogen & merquery lamp works.

0 Answers  


using n1*n2 which type transformer is made; where n1 is primary turn and n2 is secondery turn

1 Answers   JSW,


what is idmt relay

1 Answers  


what will happen if instead of neutral we use earth wire as return conductor?if we can use ,then why we are not using in our day to day appliances?please justify the answer

11 Answers   ONGC, NTPC,


What should be the earthing resistance of an industrial substation and also What should be the house hold earthing resistance?

20 Answers   TATA, Pharma, TAAT, Jindal,


What is an iron loss or core loss pi?

0 Answers  


how to set the overload setting in the thermal overload relay?? is there any calculation in that??

3 Answers  






Categories
  • Civil Engineering Interview Questions Civil Engineering (5069)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4439)
  • Electrical Engineering Interview Questions Electrical Engineering (16576)
  • 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 (2985)
  • 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)