The importance of predictive maintenance in medium voltage

Thus, in a scenario where every minute counts, ensuring the reliability of medium voltage networks (15 kV to 36 kV) is very important to maintain efficiency and safety.

More than fixing problems, the companies that stand out today are those that anticipate failures and use technology to monitor their systems in real time.

This is where predictive maintenance comes into play, combining intelligence and precision to transform the way we take care of the energy that drives businesses. Come with us and learn more!

Understanding the types of electrical maintenance

Before understanding the role of predictive maintenance, it is important to differentiate the three main types of maintenance applied in medium voltage systems: corrective, preventive, and predictive.

1. Corrective maintenance

It is performed after a failure occurs. The goal is to repair the equipment and restore the system's operation.

2. Preventive maintenance

It is based on periodic inspections and replacements, following a fixed schedule. This strategy reduces the occurrence of failures, but does not always consider the actual condition of the components. In some cases, parts are replaced before necessary, increasing costs without a proportional gain in performance.

3. Predictive maintenance

Unlike the previous ones, it uses technology, sensors, and continuous analysis to evaluate the condition of the equipment in real time. The focus is to predict and anticipate failures, intervening only when there are concrete signs of degradation. Thus, the investment in maintenance becomes more efficient, precise, and aligned with the actual lifespan of the assets.

How does predictive maintenance work in medium voltage?

Predictive maintenance in medium voltage systems involves the constant collection and analysis of data from equipment such as circuit breakers, transformers, disconnectors, and cables. The goal is to identify anomalies before they evolve into critical failures.

See what the main applied techniques are.

Thermographic analysis

It uses infrared cameras to identify abnormal heating points in connections and panels. This technique detects overloads, poor contact, and insulation failures — common causes of electrical interruptions and fires.

Partial discharge analysis

It monitors electrical phenomena that indicate the onset of insulation failures in cables and transformers. Detecting these discharges at an early stage allows acting before insulation breakdown occurs.

Vibration measurement

Applied mainly to circuit breakers and disconnectors, vibration measurement evaluates the mechanical condition of the components. Abnormal vibrations signal misalignments, looseness, or excessive wear.

SF₆ gas analysis

Sulfur hexafluoride (SF₆) gas is widely used in medium voltage equipment. Monitoring the purity and pressure of the gas is crucial to ensure electrical insulation and prevent internal failures.

Insulating oil analysis

In oil-filled transformers and circuit breakers, monitoring detects contamination, moisture, and thermal degradation, factors that compromise insulation efficiency.

Continuous monitoring of temperature and contact resistance

Sensors installed on busbars and terminals measure critical parameters that reveal the aging or overloading of components. This allows for precise interventions without the need to shut down the system.

These technologies, combined with analysis software and historical databases, form an intelligent maintenance ecosystem. The result is more predictable, safe, and economical management.

Discover the direct benefits of predictive maintenance

The application of predictive maintenance in medium voltage generates significant benefits in both the short and long term. Among the main ones:

The role of predictive maintenance in the future of energy

The digitalization of the electrical sector has been transforming the way companies manage their assets. In medium voltage networks, the trend is for predictive maintenance to become the standard.

Smart sensors, SCADA systems, and IoT (Internet of Things) solutions already allow remotely tracking equipment performance and issuing automatic alerts when something deviates from the standard.

With the advancement of data analysis and artificial intelligence, utilities and industries now rely on increasingly precise predictive models, capable of anticipating failures based on historical behavior and environmental conditions.

This evolution represents more energy security, lower operational costs, and a firm step towards an autonomous, safe, and efficient electrical system.

Conclusion: reliability and efficiency that start with prevention

Predictive maintenance is a necessity in a scenario where electrical reliability sustains the productivity and safety of operations.

By investing in monitoring and diagnostic technologies, companies reduce risks, optimize resources, and ensure that energy flows with stability and efficiency.

To implement an effective predictive maintenance strategy in medium voltage, the quality of the equipment is decisive.

Trifásica Elétrica offers equipment and solutions from 15 kV to 36 kV designed for maximum reliability, durability, and compatibility with advanced monitoring systems.

Monitor your network safely and efficiently! Visit our website and see how we can boost the performance and reliability of your medium voltage electrical system.