Compact Secondary Substation in Aluminum enclosure CSSinAL1
CSSinAL1 housing is composed of reinforced-concrete foundation, ready prefabricated type sheet elements and of a supportive sub-construction. Type sheet elements are made of 3 mm thick aluminum and are protected by dry electrostatic polymerization in a nuance marked as RAL 7032. The supportive sub-construction is made by steel profiles made of 3 mm thick pickled sheet.
The basic construction is vertical profiled pillars and horizontal pillars, reinforced in two axes, in the upper and lower part of the pillars, with diagonal connections in all areas between the pillars. Sub-construction is made in such a way that it is completely dismountable with enough solidity for supporting aluminum lining. Anticorrosive protection of sub-construction is made by electrostatic varnishing in a nuance marked as RAL 9006. Connection between sub-construction and foundation is realized by M16 screws anchored in eight points. Pillar linings made of 3 mm aluminum sheet are first mounted on supportive sub-construction and then come door and masks. All doors and some masks are made with horizontal ventilation openings which provide enough input and output air flow for natural transformer substation cooling.
CSSinAL1 is mounted in a way that a transformer supporter made of reinforced UNP 14 profiles are connected to profiles anchored in reinforced concrete foundation. MV and LV blocks are mounted in a way that they are leaned on specially prepared profile supporters connected by welding to profiles anchored in reinforced concrete foundation. Under the substation there is oil and water tight bath large enough to accept all the quantities of possible oil leaking from the energetic substation. Thereby a possibility of probable spillage of substation oil or spread of fire is prevented. Use of oil bath is in accordance with application of Rulebook on technical regulations for special protection of electro-energetic plants from fire (“Official Gazette of SFRY”, No. 16/66, changes and amendments published in “Official Gazette of SFRY”, No. 58/72 and 24/75).
Transport and mounting the CSSinAL1 housing is done with a crane using hooks directly connected to the basic steel construction.
CSSinAL1 is mounted on a previously prepared reinforced concrete foundation. Preparation of the reinforced concrete foundation is done according to the type design or according to instructions for terrain preparation.
Basic outdoor dimensions of transformer substation are: 2200 x 3000 x 2700 mm. Housing mass without LV block, MV block and substation is 1980 kg.
It is not foreseen to have a fire extinguisher as the substation is without crew. Transformer substation in its construction and equipment characteristics gives enough firefighting safety.