Phu My 3 BOT Power operated in 2002 with 4 transformers. After a long time of operation, oil and copper probes have been conteminated by sulfate corruption and others, which have reduced the ages and the functionality of the tranformers.
Sitram Reg by Siemens was used this time for one of the large transformers in Phu My 3 BOT Power. Sitram Reg refine conteminated oil according to IEC 60422 online without changing oil.
Inside SITRAM LAB
The total time needed for oil refinary depends on the capacity, the ages, and the high or low property of DBDS (Dibenzyl Disulfie) in the oil of transformer. This time, the refinary time is 2 months with the core result of DBDS reduction from 99 before refinary to 5. The number of oil sample tests is 14.
Oil test after tests: 8 times (second from right) and 14 times (far right)
This is the first transformer oil refinary of Phu My 3 BOT Power. With experiences saved from this time, the following time shall be better prepared and carried out faster.