Stones are often laid in switchyards for a variety of purposes, including the following:
1). Electrical Insulation
2). Drainage
3). Grounding
4). Access and Preventative (Maintenance) Measures
5). Protection from the Flames (or) Fire
1). Electrical Insulation
Switchyards are locations that are used for the installation of various types of electrical equipment, including transformers, circuit breakers, and busbars. Stones, especially those composed of insulating material like gravel (or) crushed rock, contribute to providing electrical insulation and should be used wherever possible. They do this by blocking the passage of electric current to the ground, which in turn reduces the likelihood of electrical defects or short circuits occurring.
2). Drainage
Stones provide for effective drainage of rains and minimise water buildup in the switchyard because of their porous nature. The presence of an excessive amount of water may cause damage to electrical equipment and create safety issues. The stones provide a surface that is porous, which enables water to pass through while also lowering the danger of harm caused by water.
3). Grounding
Switchyards need to have their grounds properly grounded in order to ensure the safe discharge of any electrical faults or surges that may occur. Crushed stone (or) metallic aggregates are two examples of conductive stones that may be utilised to provide a low-resistance channel for electrical currents to follow on their way to the earth. These stones contribute to the establishment of an efficient grounding system, which in turn protects the employees and equipment from any electrical threats.
4). Access and Preventative (Maintenance) Measures
Within the switchyard, the workers are able to walk (or) drive on stones, which create a surface that is both sturdy and conveniently accessible. They provide a stable base for heavy machinery, equipment, & vehicles, which makes it possible to do maintenance, repairs, & equipment installation in a time effective manner.
5). Protection from the Flames (or) Fire
Stones may be useful in reducing the danger of fire in switchyards under certain circumstances. They function as a barrier that fire cannot penetrate and stop the progress of the blaze. Stones not only prevent the development of plants but also reduce the amount of available fuel for any possible flames.
In switchyards as a whole, the usage of stones serves several goals, including those of providing electrical insulation, drainage, grounding, accessibility, & fire protection. The particular needs, electrical standards, & safety rules that are relevant to the switchyard in issue will determine both the choice of stones to be used and the placement of those stones.