Infrared Thermography as a Diagnostic Tool in Power Engineering

Thermal imaging, also called thermography, is the production of non-contact infrared pictures from which temperature measurements can be made. This technique is used to detect anomalies often invisible to the naked eye, even while electrical systems are under load. When a connection becomes loose there is a resistance to current that can cause an increase in temperature and subsequent failure of components, potentially resulting in unplanned outages and possible injury. In addition, the efficiency of an electrical grid becomes low prior to failure, thus energy is spent generating heat, causing unnecessary

losses. If left unchecked, heat can rise to a point at which connections will melt and break the circuit; as a result fires may occur. Besides loose connections, electrical systems suffer from load imbalances, corrosion, and increase in impedance to current. Thermography will quickly locate hot spots, determine the severity of the problem and help to establish the time scale in which the equipment should be repaired. Thermography is also particularly useful for inspecting indoor and outdoor components such as motor control centres, substations, breaker panels, switchgear, transformers and circuit breakers. Thermography not only detects high temperatures but can also be used to detect temperatures that have fallen below recommended levels, thus providing a very wide range of functions. All surveys are qualified by a fully comprehensive report, detailing our findings and recommendations for the repair of any faul. For more information on the use of Electrical Power Distribution and Installation: ...(Read whole article)

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