Scenario

Nameplate data of transformer:

Transformer: GSU transformer
Manufact: xxx
Year: 1974
Power [MVA]: 760
Voltage [KV]: 400
Oil mass [Kg]: 55.000

Problem

See analytical results of the oil before treatment (table below)

Soluzione Sea Marconi

Solution: Dehalogenation treatment (CDP Process®) in order to remove the PCBs from the oil and transformer.

Before treatment

After treatment

TAN [mg KOH/g] 0,029 < 0,010
Breakdown voltage [KV] 58,7 75
PCBs [mg/Kg] 57,2 9,6
Transformer on which the dehalogenation was done

Identified Critical issues


Applied solutions

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