Follow Our FB Page << >> for Daily Laughter. We Post Funny, Viral, Comedy Videos, Memes, Vines...

How to Calculate 11 KV Side Cable size of a 250 KVA Oil
cooled transformer

Answers were Sorted based on User's Feedback

How to Calculate 11 KV Side Cable size of a 250 KVA Oil cooled transformer..

Answer / a.narasimha rao

Transformer capacity is 250 KVA

Primary current = 250000/1.732x11000= 13.12 Amps

Short circuit current ( 6 times primary current )

total current would comes -----90 amps

Size of the cable --- 3c X 35/ 50 11 kv HT XLPE
cable is required for primary

Secondary side current -----333.35 amps

cable size is 3.5 c X 300 AYFY cable is required

Is This Answer Correct ?    18 Yes 14 No

How to Calculate 11 KV Side Cable size of a 250 KVA Oil cooled transformer..

Answer / pillay

IS it a 250 KVA or 2500 KVA transformer? any way you must
know the operating current first before determining the
cable size. if 250 kva than 250000 / 11000 / 1,732 = 13.12
amps the cable should be able to withstand 11000 volts and
carry 13.12 amps.

Is This Answer Correct ?    12 Yes 9 No

Post New Answer

More Electrical Engineering Interview Questions

Car battery + terminal allways biger than - terminal! Why?

2 Answers  

Re: What do you mean by Power factor of a generator? Power factor purely depends on the load (wether inductive, reactive or unity) then what does the Power factor mentioned on the generator nameplate means?

2 Answers  

Is only insulation the difference between High voltage and Medium voltage cable?

1 Answers  

what is JE exam?

0 Answers  

why the check zone and main zone are used for Busbar Protn. scheem?

0 Answers  

eddy current losses depends on?(a-max magnetic feild,b-avg magnetic feild,c-on frequency,d-on square of frequency)?

3 Answers   Ecil,

What is the formula to find maximum load of a DG (Single phase and Three phase)?

1 Answers  

What is disc insulator and it's application..?

2 Answers  

If one tertiary phase i.e. R,Y or B is earthed of a loaded type tertiary delta connected (Without load)of a power auto transformer, what is its advantage/disadvantage?

0 Answers   Amara Raja,

How to use computer cpu ups use for home inverter circuit board

0 Answers  

How does ELCB work when exist earth foult? and How does RCCB work when exist earth foult?

1 Answers  

how many frequent start/stop operation possible in case of HT MOTORS.

5 Answers   DVC, Steel Plant,

  • Civil Engineering Interview Questions Civil Engineering (5075)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4444)
  • Electrical Engineering Interview Questions Electrical Engineering (16597)
  • Electronics Communications Interview Questions Electronics Communications (3915)
  • Chemical Engineering Interview Questions Chemical Engineering (1092)
  • 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 (2987)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (123)
  • 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 (1377)