Among the “crown jewels” interventions of 2013, the selective depolarisation to remove the DBDS and polar compounds on 5 transformers must indeed be mentioned. In particular, the activity took place on 4 transformers and a rectifier (for a total of 170 tons of oil) operating at the Urrà, hydroelectric power station North-Western Colombia (read the article relative to the operation start).
The said power station is located in a National Park, with very strict environmental and landscaping regulations, and it was for this reason that the Sea Marconi solution has been preferred as alternative to the change of the insulating oil.
This latter option would have involved the handling of hundreds of tons of oil in tanks, involving unreasonable risks.
The Chedcos selective depolarisation by Sea Marconi, instead, allows keeping the contaminated oil in operation and progressively decontaminates it (example DBDS < 10 mg/kg) until all the parameters reach the values prescribed by the sector (or local regulations).The treatment is carried out thanks to special treatment plants, designated as Decontamination Mobile Units (DMU) decontaminating the oil thanks also to the use of special patented reagents.
The Chedcos selective depolarisation by Sea Marconi, instead, allows keeping the contaminated oil in operation and progressively decontaminates it (example DBDS < 10 mg/kg) until all the parameters reach the values prescribed by the sector (or local regulations).The treatment is carried out thanks to special treatment plants, designated as Decontamination Mobile Units (DMU) decontaminating the oil thanks also to the use of special patented reagents.
This intervention provided the validation of the selective depolarisation Chedcos also for the transportation and distribution grids disseminated in Colombia. The results of the treatment have been excellent, for this reason the Customer invited Sea Marconi to present them in a technical article enriching the technical-scientific community in the territory.