Earthing

For an electrical system that is as safe as possible, earthing of the protection is carried out in the electrical cabinet and near each group with electrical measurements. Earthing is done with galvanized electrodes with a length of 1.5 m and their line is made with bare copper conductor S=95 mm2. Inside the electrical cabin, a pre-metral contour is made with zinc conductors where all the electrical cables and metal parts of the cabin are grounded. The earthing of the measurement boxes is connected as close as possible to the boxes. The earthing resistance value should be <4Ω. If this value is not eached, electrodes are added or soil improvement is carried out, mixed with coal and salt.