Question { 4350 }

Which neutral is use when DG(3 Phase)is running?

Answer

3 phase with neutral coming from alternator. alternator internal winding is star connection so star connection middle is connected to earth this is neutral earth so alternator output taken for 3 phase and N. Ans; alternator N

Question { Anwar Ispat, 19906 }

Whats the use of earth pits? and it will function? whats
the natural earth value? How to improve ur earth resistance?

Answer

What is use of earth bits?
Earth is 2 type 1.neutral earth 2.body earth neutral earth called us parallel in phase for any load its not parallel in phase any electrical equipment was not working. body earth is called us it is connected to only electrical machine body any leakage current passed in machine body reduced to earth side so avoided electric shock .
Neutral earth value?
Neutral earth value is 5 ohm individual .combine neutral earth value less than 1 ohm.
How to improve earth value?
methods:
1. earth bits side add water and salt ,chemical powder in weekly once.
2. check weekly once for earth bus bar bolt net any loose condition.
3. only using pipe earth.
4. pipe earth max length 10 feet using better .
5. maximum avoid old earth bits.
6.more than 2 earth bits combine better.