When a transformer is used continuously, the performance or quality of the oil will decrease physically, electrically or chemically. There are many things that cause oil quality to drop, including oxidation between oil and wire insulation material, due to oil contamination with air, dust, gas or other impurities. For this reason, maintenance and purification of the transformer is required. Maintenance is the process of maintaining, maintaining and replacing damage, while purification is a process to improve oil quality or transformer oil purification process.
Maintenance and purification must be done regularly. Special care must be taken if the transformer operates at full load and/or under certain hazardous conditions. Maintenance and purification can be done periodically, depending on the conditions required. Usually, for new transformers, maintenance and purification needs to be carried out every 2-3 years, while old transformers can be maintained and purified once a year.
The purification process is usually carried out using 2 methods, namely the offline method and the online method. If only purification is carried out, then it can be done with the online transformer condition or when it is on or operating. But if there is an oil leak and requires replacement of transformer seals, then you can replace and purify the transformer offline or the transformer is in a dead or non-operating condition.
The maintenance and purification process usually lasts for approximately 3 hours and usually uses a power source from a portable generator to purify and maintain the transformer.
In terms of maintenance it is also different, depending on the type of transformer, whether it is an oil type transformer or a dry type transformer. If the transformer is of the oil type, then what needs to be inspected and treated is the transformer oil, including the breakdown voltage of the transformer oil, the seals on the transformer body, the LV or HV bussing connectors and the DGPT transformer protection function. If the transformer is a dry type, then what needs to be inspected and cared for is the physical condition of the transformer, both from the condition of the tank, nuts, bolts, cable connections, and cleanliness of the transformer body or around the transformer.
In the maintenance and purification process, there is something called the Breakdown Voltage Test (BDV Test). This BDV test is conducted to determine the condition of the oil breakdown voltage (transformer oil insulation power) inside the transformer. BDV tests are carried out before and after transformer purification to compare the quality and condition of transformer oil. Usually the BDV value after the transformer is purified is higher than before the purification. The BDV value indicates that after purification, transformer oil is in better condition than before purification.
So far, Galleon has been carrying out maintenance and purification for transformers with a capacity of 630 KVA to 5000 KVA, both within the city and outside the city. Supported by experienced technical personnel, Galleon is ready to serve customer needs in the electricity sector. Being a solution to electricity needs means that Galleon is committed to providing the best for customers, not only in the material sector but also in its services. Well, now what about the condition of your transformer?
