How to calculate HT XLPE CABLE for 11 kv / 433 v , 1500 kva
oil type transformer system?
plz provide step by step calculation
- 15 Answers
- 124688 Views
- Engineers India, Indian Railways, Polycab, Shashwat, Sitara Energy, Sonali Bank, I also Faced
- E-Mail Answers
Answer Posted / s.srinivasan
Generally HT cable sizing is not done based on the full
load current of the equipment but based on the prospective
fault level. For a 11kV network, generally it shall not be
less than 150sqmm XLPE.
Fault level at 11kV(furnished by respective EB)=100 MVA(say)
Details on EB's fault level can be obtained from EB.
Therefore fault current= 100*1000/(SQRT(3)*11000)
= 5.25 kA
Short circuit current rating (for 3-sec duration)of HT 11kV
XLPE cables with Alu conductor is as below:
95 sqmm: 5.16 kA
120 sqmm: 6.51 kA
150 sqmm: 8.14 kA
| Is This Answer Correct ? | 138 Yes | 29 No |
Post New Answer View All Answers
what is the working principle of energy saver control panel. please give the complete calculation & theory.
which one is more efficient, torq, power & ecnomy with the same frame size AC motor / DC motor?
How is the gain affected by the introduction of feedback in a control system.
Make a list observation on Transformer?
Why armature rheostat is kept in maximum position?
Why and when NGR panel required. Is it necessary to design a NGR panel for a 6.6kV Alternator paralleling with Grid????
I am a possesor of c licence from 1993. I forgot to renew during the year 1998. During that time I was working at TNEB to till date. Is there any possibility to get renewed? or to apply for a new one?
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 meaning of the symbol << >> put in transformer drawing
What is the tests required for a 132 kV, 400 kV , 765 kV for a Circuit Breaker and Power Transformer before commissioning ?
can anyone send me some sample question regarding power grid corp
Can you please explain creepage distance in detail, for a 6.6kV cable head what must the distance be and how do you determine it?
How to select circuit breakers rating eg. if i select a circuit breakers of capacity 40 amps DC with operating voltage 28 volts and if i what to use same circuit breakers for 300 Volts DC application what is the current rating of this circuit breakers.
Is RTCC panel needs any control supply.
Saving in copper achieved by converting a 2 winding transformer in to an auto transformer is determined by A voltage transformation ratio B load on secondary C quality of core material D size of transformer core
