distance between two pits should not 3m bcoz there is a
tecnical reason behind it, and the reason is that when
there is some heavy earth fault and if one of the pits is
acting as a returning path for earth fault current then it
might go dry due to heat dissipation by the passing
current, and simultaneously one more heavy fault happens
then these pits will offer high resistance because they
have lost moisture and which is not desirable, hence the
distance between two 3m pits should be minimum 6mts.
It can be kept as far away from each other as possible but minimum distance may vary depending upon the length of the earth electrode used. Usually it must be at least the double of the earth electrode's length.
according to bis 3043 1987 one earthing to another distance minimum 3 mtr techinacl reason is if earthing distance lass than 3 mtr than surface area is overlaping and fault curreent desipate to earth. also depend soil restivity and appplication load
Bhel supervision exam question:
If 2 generators are working in a network. And if suddenly the
field of anyone generator weakens. What will happen in the network?
1. The generator will run as motor
2. The generator will run as motor in reverse direction
3. The generator will take lighter load
4. The generator will take more load
In secondary transmission i.e., in distribution side,
supply for homes are connected through different phases in
order to balance the 3 phase load.
But in practical we saw nearby house doesn't have power due
to single phasing. But other two phases give supply.
How it's possible? it doesn't make "single phasing"?