Answer / svss

Crushed stone is a highly resistive material and this is
used in substations to protect the operating personal from
touch potential and step potential which may be very
dangerous in case of an electrical fault in the substation.
And the other reasons are it will not allow water
stagnation on top layer, and is not slippery.

Answer / archana

2 avoid stagnation of water,to prevent growth of plants,
and the main reason of placing stones is 2 protect the
persons from hv while walking.there is a mathematical
calculation based upon human resistance with earth
resistance regarding how much amount of stones should me
placed in tha yard.

Answer / timer4u

To avoid water
stagnation and
prevent plants(trees)
from growing in the
sub station area,
where equipment are
placed.
This is what they told
us, when we visited a
substation recently......

Answer / k.prakashchandra

Granite aggregate is spread around Tr plinth to 1.prevent
vegetation 2 reduce both touch and step voltages 3 provide
an antiskid surface

Answer / pratik

The main reason is that of stepping potential. In the transformer area stepping potential should not be more than a certain value. We know the fact clearly that we cannot walk fast over stones, our steps do become slow, and with this our stepping potential becomes less which is required for our safety.

Answer / saravanan

improve earth resistance

Answer / puja

To prevent the snake's due to hissing noise generated by changing the dimension of core flux...

Answer / yanamadalaashok

To avoid earthing continuity ,water stagnation & not moving
of snakes.

Answer / syam mohan

it will absorb the vibrations of the transformer,provide a
good conducting path to the earthing, prevent the growth of
plants, To avoid water stagnation

Answer / n.gopala krishna

transformers having oil for cooling purpose supose oil
spilleage is there the oil will sink and absorb to prevent
slippery and fire

Why we use circular(Stepped) cross section in transformer core?

0 Answers  

hi every body i am master student in control engineering and my project is slip control in trains i assumed a Dc motore as traction motor but i don't have characteristics of this kind of motor that is used in train. i want from every body if he or she has the characteristics or information about Dc motor that is used in train give me those information or technical characteristics .

0 Answers  

WHY MOSTLY Rph IS USED FOR CONTROL CIRCUITS AUX. SUPPLY ?

0 Answers   UltraTech,

Two alternators say 1 & 2 are poised to parallel operation. But at the time of paralleing alternator 2 gets out of the system by tripping Earth fault relay. Please send me reply why this is happening?

2 Answers  

how much resistence in proper earthing?

5 Answers  

Why the ceiling fan rotates in clockwise direction and table fan rotates in anticlockwise direction.

3 Answers   Kirloskar, MPF, Wipro,

what are advantage and disadvantage of hvdc transmission . please tell us technic of hvdc technology

2 Answers  

what is amf panel & how it is working

6 Answers   ATS,

if we are using ACB in a panel the how much clearance do we need in panel room.

2 Answers  

what is difference Auto-transformer and ICT ?

1 Answers   CG, Descon,

How to calculate the NGR value for a 2.7MVA Transfomer, 11KV system where the fault current has to be limited to 50A?

1 Answers   Sterling Wilson,

what is the earth to neutral voltage(maximum and minimum) according to ieee standards

4 Answers