The reinforced substations, type ”Karposh” from 10-20/04 kN, 1000 kW, are planned as standard buildings made of prefabricated reinforced elements designed for distributive and industrial workshops with 10-20/04 kN voltage. The substations have the typical dimensions according to the engineering standards for this type of building taking into consideration the most unfavorable conditions.
The elements are reinforced and casted out of concrete MB30, while the roof elements have a waterproof element also. The surface of the reinforced elements is smooth, with no holes, and made out of fair-faced concrete. For urban usage of the buildings, the color can vary depending on the needs and wishes of the investor. The metalwork (the doors and the air hole inlet in the processed facades) is made of aluminum. The air hole inlets have a fine net that blocks animals and outside objects from entering.
All doos open outwards and have locks that can be opened without a key from the inside. Only the people in charge have a serial key that can open the door from the outside. The louver vents on the roof are made of frames of flat iron with outstretched wire.
The assembly of substations is in the following order:
A 10cm layer of sand is placed on a flat surface. Afterwards, a reinforced concrete flagstone with 80/80/10cm dimensions is placed on top. This helps the surface to adjust to various bearing capacity.
The foundation wells are placed on the foundation plates. After they are leveled, the placing of foundation beams and cable ducts follows. In the end, the floor is tiled with concrete slabs.
The ventilation in the transformer chamber has a complete natural air circulation through the air holes on the roof and those on the processed facades placed on 20cm height.
The assembly duration of the construction part is limited to three days. This is achieved with the elements shape, weight, and the method of assembly. The constructive solution allows the process of assembling and dismantling not to affect the quality of the constructive elements, their form, their appearance, and their static safety. The constructive solution of the foundations allows the cables to be spread into cable ducts in every possible direction in the building without affecting the stability of the building itself.
Under the high-voltage block and the low-voltage board, there is planned space for cable distribution, and space for cable access that will allow working with them. The elements that compose the substation i.e. the materials and the quality of production allow easy maintenance and fitting into the surrounding space.