Electrical transformation substation

An electrical transformation substation comprising:

• a containment box extending along a longitudinal direction and comprising a first box compartment, a second box compartment and a third box compartment, wherein the first, second and third box compartments each define a respective compartment and are arranged adjacent to one another in the longitudinal direction when the electrical transformation substation is in a position of use, the second box compartment being arranged between the first and third box compartments;
• a first-voltage switchgear having a first-voltage power and arranged in the first box compartment;
• an electrical power transformer configured to convert the first-voltage power into a second-voltage power lower than the first-voltage power and arranged in the second box compartment,
• a second-voltage switchgear having the second-voltage power and arranged in the third box compartment, wherein the containment box comprises a box bottom wall which, in the position of use lies on a support surface, a box upper wall opposite the box bottom wall, a first and second box side walls opposite to one another, a box front wall and a box rear wall opposite the box front wall, and the first box side wall and the second box side wall laterally delimit the first box compartment and the third box compartment, respectively, and
• a forced-air cooling system comprising:
• a first air intake and a first air extraction device being arranged on an outside of the electrical transformation substation on the box upper wall and in communication with an inside of the containment box, the first air intake and the first air extraction device are arranged at respective openings formed in the box upper wall at the second box compartment, and
• a second air intake and a second air extraction device being arranged on the outside of the electrical transformation substation on the box upper wall, the second air intake and second air extraction device at respective openings in the box upper wall, wherein the second air intake is arranged at the first box compartment or the third box compartment and the second extraction device is arranged at the third box compartment if the second air intake is arranged at the first box compartment or at the first box compartment if the second air intake is arranged at the third box compartment.