If a device shows a temperature change of greater than what degree Celsius based on comparison with similar components, should it be removed from service?

The guideline for removing a device from service when it shows a temperature change is primarily based on the risk of degradation or failure linked to thermal performance. A temperature change of 15° C is significant enough to indicate that the device may be operating outside of its optimal parameters. This threshold is set to ensure safety and reliability.

It is important to note that at 15° C, the deviation often suggests potential issues such as poor connections, insulation degradation, or impending failure, which can impact the device’s performance and safety. Continuous operation under abnormal temperature conditions can lead to further damage or unsafe scenarios, justifying the need for removal from service for inspection or repairs.

In comparison, the other temperature changes – 10°, 20°, and 25° C – either do not indicate a severe enough problem (in the case of 10° C), or they set a limit that may be too high (20° C and 25° C) to ensure proactive management of device health and safety. Thus, 15° C provides a balanced and prudent threshold for intervention, reinforcing the importance of maintaining operational integrity.