Transformer failure is a constant worry for anyone whose job revolves around maintaining such systems. With business continuity and safety at stake, it is essential that asset managers stay on top of their transformer equipment and ensure they remain fit for purpose as they see increasing demand and age over time. In the event that they begin to fall short of performance expectations, most people would think it is time to get the transformer replaced. However, doing so can not only be expensive but also disruptive to business operations. This is where retrofilling comes in to provide a more convenient way of upgrading transformers and prolonging their service life.
What is Transformer Retrofilling?
Retrofilling a transformer involves draining its existing insulating liquid with a new one. Most of the time, the fluid being replaced is mineral oil, which has long been the go-to option on the market because of its low price and good performance in many everyday use cases. An advanced fluid such as natural or synthetic ester fluid typically takes its place to effectively upgrade the transformer with its many demonstrable benefits. The entire process can be done on-site, and retrofilling any transformer can often be completed in as short as eight hours–which is well within the average timeframe of planned maintenance schedules these days–with daily operations rarely getting affected. And among the many key advantages of retrofilling, its ability to give transformers a new lease on life is undoubtedly the most important.
How Retrofilling Can Extend The Life of Ageing Transformers
Prolonging the life of vital and expensive equipment is among the top concerns of any asset manager. Transformers no doubt fit this category, and needing to replace them before it is absolutely necessary can prove to be a difficult proposition for any organisation. This is why retrofilling and its proven benefit of increasing a transformer’s lifespan can be a lifesaver for those looking to get the most value from their investment. Not only that, the process can also enable transformers to operate under increased load in some cases.
As a refresher, water is one of the many driving factors of ageing in transformer equipment, which typically makes its way in from the atmosphere or is produced as its oil-paper insulation deteriorates. This moisture then degrades the solid insulation material at a more accelerated rate. In contrast, esters boast a greater moisture saturation point compared to mineral oil, which allows them to absorb more water, effectively keeping the solid insulation drier and slowing down its rate of degradation. This, in turn, decelerates the paper ageing process and extends transformer life. In theory, esters can improve insulation longevity by five to seven times, which translates to insulation life extension of anywhere between 25-50%, if not more.
Conclusion
Regardless of whether they undergo retrofilling or not, the fact remains that all transformers will need to be replaced at some point down the line. Some organisations may have their reasons for choosing to invest in newer assets rather than extending the life of their old ones, but when it comes to transformers, there’s no reason not to retrofill. After all, opting to do so virtually guarantees to offset the initial investment, and it brings many other benefits like improved operational safety, environmental performance, and better insurance options.
With that said, if you’re in search of an expert who can retrofill your transformers and deliver other essential services to your vital equipment like electric motor overhauling in Singapore, look no further than MES. As one of the most trusted electrical and mechanical engineering service providers on the island, we’ll make sure all your electric assets perform optimally as well as maximise their longevity.