how to claculate earth strip size for 1500kVA transformer
for neutral and body
- 4 Answers
- 36157 Views
- I also Faced
- E-Mail Answers
Answer Posted / bala.a
you will follow as per State electricity board norms - 50
x 6 mm Cu for Nu and 50 x 6 mm GI FOR body 0r
you will calculate as per short circuit calculation
Formula 0.0054 x root t x I
Where
t =1 second
I = SHORT CIRCUIT CURRENT
example
Fault current- 33kA( assumed )
0.0054 x root 1 x 33000= 178.2 mm
so you will recommended 50 x 4 mm Cu
| Is This Answer Correct ? | 14 Yes | 9 No |
Post New Answer View All Answers
how to calculate singlephase motor efficiency?
Can I use star delta connected induction motor for dual supply voltage?
what is meaning of sympathetic tripping with respect to relays and give the values for current carrying capacities for copper and aluminium cables from 16sq mm to 500sq mm
What is knee point voltage of transformer?
why star point of HT motor not earthed?
please send previous exams question papers
how is positive, negative, zero sequence is happen.. how is effect on 3 phase system
What is the two pole structure?
Why the power generated in dams is complex power? Why the generators in dams cannot produce Real power directly (i.e power which has zero reactive part)?
How to define Kirchhoff current law and voltage law along with simply examples.
How to perform a DC resistance test In Alternator and their proceduces?
how can decide the current rating of oltc
Explain about 3 phase motor fault current calculation with examples?
how harmonics generated in induction furnance? how minimise it?
how diside ct mf exmp.200/5 ct
