No electric system can function well without a transformer, which serves to step up or step down voltages to enable efficient power distribution. But as with any other electrical distribution equipment, transformers do not have an infinite lifespan and only last anywhere between 30 and 50 years. Regardless of whether it’s due to ageing or significant changes in their operational efficiency, the fact remains that neglecting a transformer’s overall condition poses significant risks to organisations in terms of higher maintenance costs, wasted energy, and becoming a potential point of failure. Below, we cover the key signs that your transformer needs to be replaced sooner rather than later.
1. Signs of Weak Points and Deterioration
Common signs of deterioration among transformers can be observed physically and through monitoring. When it comes to the former, these include increased noise levels, degraded insulation fluids and leaking oil, and even consistent paint damage like flaking or warping, which points to the equipment running much hotter than usual due to being near failure. Speaking of running hot, this also applies to internal bushings and connections, which can only be observed through infrared scans. As such, it is recommended to scan transformers periodically to determine internal weak points and learn whether they can still be repaired or if a total replacement is necessary.
2. High Results in Dissolved Gas Oil (DGA) Tests
DGA tests reveal if there are any dissolved gases in a transformer, which typically occur due to material breakdown of the parts that make up the system. The results of these tests offer valuable insights into the transformer’s condition and, depending on which gases are discovered to be exceptionally high, provide a good indication whether it is time for a replacement.
3. Dark Oil Color
When servicing a transformer, make sure to take note of the colour of the oil inside it. A dark or blackened hue is generally a sign that the transformer experienced a severe level of strain due to a hit or surge. Even if it remains operational despite that, it is safe to assume that the transformer is simply limping along at this rate and replacing it before it encounters total failure is highly recommended.
4. Higher Electrical Demand
Any significant increase in a facility’s electrical demand will strain your current transformer’s capacity beyond its limits. The situations that can cause this range from expanding one’s operations to simply adding new equipment and machinery. This causes a transformer to become overloaded and consequently overheat, reducing efficiency and increasing its potential failure rate. Therefore, an upgrade to a higher-capacity transformer should go hand-in-hand when making such changes to safely meet the increased demand.
5. Changing Voltage Requirements
Another factor that warrants replacing an existing transformer is whether the equipment connected to it has new voltage requirements. This commonly occurs when, say, switching to a new utility voltage standard or upgrading machinery on the production floor. In such cases, the current transformer may become incompatible and result in mismatched voltage levels, risking equipment malfunctions and other potential damages. Hence, a transformer replacement becomes absolutely necessary to maintain seamless operations and preserve other equipment.
Conclusion
Transformer deterioration is a critical issue that can lead to significant operational disruptions if not addressed promptly. Key signs to watch for include unusual noises, excessive heat, inconsistent voltage, and visible signs of wear, such as leaks or corrosion. Recognizing these warning signs early can help prevent failures and ensure the reliability of your electrical system. When these indicators appear, it may be time to consider replacing the transformer to maintain safety and efficiency in your facility.
To ensure you stay on top of your transformer’s condition, consider partnering with MES today for dedicated transformer maintenance services and other integral solutions like generator overhauling in Singapore. By working with a trusted electrical and mechanical engineering service provider, you can rest easy knowing that your facility’s vital equipment is always running in perfect shape.