Hello! I am not a specialist in mine equipment, but logic suggests something like this.
The main ground electrode - apparently in this case (and in all others) - is a ground electrode with the largest cross-sectional area and contact with the ground. You even have its dimensions indicated.
The point is that if you remove the main earthing switch, it is more likely that a step voltage may appear in emergency situations, the equipotential bonding does not function normally. Add to this the increased risk of electric shock in the mine and the huge risk of explosion and fire.
High-quality grounding allows you to accurately adjust various protections, such as differential, for tripping equipment and cable lines in case of damage, accordingly reduce the risk of sparking and other unpleasant moments.
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thanks for the answer!
What can you say about the local ground electrode system, what is its essence and what will happen if you remove it?
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Applying for an internship for an employee who will have an electrical safety group
