why the flooring of substation is done with small pebbles or
stones..?
Answers were Sorted based on User's Feedback
Answer / d k sharma
there are two terms defined regarding floor of earthing system
1. touch potential(pot b/w hand and structurals (gnd) when a person is touching a grounded body like structurals in switchyard
2. step potential(pot diff b/w the feet of a person walking in the switchyard)
now to minimize these potentials we put pebbles in place of flat flooring.
the reptiles,moisture etc. are secondary reasons...
Is This Answer Correct ? | 18 Yes | 3 No |
There are following resons
1.To Raduce the magnatic field in between ground and
conductor.
2.To Reduce the growth of gress.
3.To aviode entry of animals like Rats, sneks etc..
4.To Reduce water storage in the yard in the rainey
seansion
Is This Answer Correct ? | 26 Yes | 15 No |
Answer / dinesh
In a substation the conductors will be near in distance to
the earth, so that the flux of the conductor may cause a
shock to the person who enters the substation. so in order
to increase the resistance between the earth and
conductors, pebbels or gravels are used...
Is This Answer Correct ? | 8 Yes | 1 No |
Answer / umesh
Gravels / Pebbles 40mm Size should be upto 75 mm thickess
is provided through out the switch Yard for the protction
of humanbeing & material . This Stone is reduced Step
Potential & Touch Potential to protect electric sock.
Is This Answer Correct ? | 5 Yes | 0 No |
Answer / abk
I too thought abt it n done research on it.......
* minimizes step ground potential
* easy to clean once there is spill of oil and any chemicals
* uniformity of design criteria based on international requirements.
Is This Answer Correct ? | 7 Yes | 3 No |
Answer / arindam sarkar
AS water beneath the substation may provide condutivity for
electricity ,so pebbles are provided to break the surface
of water since water surface has high conductivity ,so that
flow of electricity is not continous.
Is This Answer Correct ? | 6 Yes | 2 No |
Answer / sreenadh
we use pebbles in substation for mainly to reduce the
reptile movement,increase soil resistivity and for drying
up of transformer oil in case of any leacage.
Is This Answer Correct ? | 19 Yes | 19 No |
Answer / suresh kumar
pebbles is used to maintain moister below the ground level.
good the moisture better the earthing result
Is This Answer Correct ? | 7 Yes | 8 No |
for reducing the ground resistance of the foot
Is This Answer Correct ? | 9 Yes | 11 No |
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