Dry-type transformers – which are cooled by air rather than oil – have a much lower maintenance cost than their oil cooled equivalents. Oil samples from oil type transformers need to be regularly taken and analysed as this provides valuable insight into the condition of the unit and any possible areas of underperformance. These oil checks are similar to taking a blood sample, as the analysis allows the owner to predict the necessary steps to keep the transformer in optimal condition. In dry-type transformers, the absence of oil as a coolant significantly reduces the maintenance cost. They require a simple check to ensure that air is passing over the equipment at the desired volumes and speed. In very dusty environments, there may be a need to regularly clean dust off the enclosure; however, there is no need for costly or time consuming oil sampling, analysis and related expertise.
August 26, 2024