A decrease in insulation resistance over time typically signals what?

A decrease in insulation resistance over time is often indicative of a potential insulation issue, as it suggests that the insulation material is deteriorating or compromised. Over time, various factors such as moisture ingress, thermal stress, chemical exposure, or mechanical damage can lead to a decrease in insulation resistance. This decrease can create conditions conducive to electrical leakage, which poses a risk for equipment failure, electrical shorts, or fire hazards.

Recognizing a drop in insulation resistance allows for proactive measures to be taken to assess and repair any insulation problems before they lead to more serious issues, such as equipment downtime or safety hazards. Monitoring insulation resistance is a critical part of the overall maintenance strategy for electrical systems to ensure they operate safely and effectively.