Using infrared vision obtained a thermographic analysis they can detect, among other things, bad connections, load phases unbalance and operating temperature high in the components of the electrical installation.
Then proposed three practical examples in order to show the advantages in the realization of infrared thermography in switchboards.
Wrong connection.
Problem detected: is observed that the fuse of one of the phases is at a temperature slightly higher than the others. This indicates a possible failure of the fuse or the existence of imbalance of charge in phases.
Proposed solution: check the connection corresponding to the affected fuse/base and perform a posterior thermography to confirm the disappearance of the anomaly. If the hotspot persists other procedures will be used to determine whether the problem is caused by the fuse/base. If so this element will be replaced.
Unbalance of the phases.
Problem detected: The cable from one of the phases is working at a temperature above regarding other phases, which demonstrates the existence of imbalance between phases.
Proposed solution: tighten the connection corresponding to the affected cable and perform a posterior thermography to confirm the disappearance of the defect. If the hot spot is maintained, is determined by other procedures if the problem lies with the switch (if so, the protection will be replaced).
High operating temperature.
Problem detected: the relays are a close to the intended temperature (90°C) due to overcrowding (or little separation) and the poor ventilation of the envelope.
Proposed solution: known that the operating temperature of the relays is normally high, so it is recommended that they are separated, ensuring adequate ventilation of the cabinet for the purpose of decreasing the temperature. The solution shall be verified by performing a new thermography..
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