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Thermal Imaging Services (UK) Limited INFRARED THERMAL IMAGING CONSULTANTS |
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Electrical Predictive Maintenance
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ELECTRICAL PREDICTIVE MAINTENANCE
Will identify problems caused by current/resistance relationships. Generally a hot spot will be generated in an electrical circuit as a result of either a loose, oxidised or corroded connection or a malfunction of the component itself.
Candidates for an infrared electrical survey include overhead transmission lines substations, transformers, thyristor banks, circuit operating devices, switched, fuses circuit breakers, control equipment, motors and motor control centres.
The heat generated at the point of increased resistance is conducted away by the adjacent conductor and air. When this occurs the thermogram will show a hot area at the connection and a gradual tapering off of temperature as the distance form the connection increases.
But not all electrical over-heating is a sign of increased resistance. In a 3 phase system, for example, a small change in current flow can result in a considerable amount of heating difference. In this case the overheating will appear to the inspector as a consistent temperature along the length of the conductor.
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