What does a sudden drop in resistance measurement indicate in a motor?

A sudden drop in resistance measurement in a motor typically indicates a potential problem. When resistance decreases unexpectedly, it can point to issues such as insulation failure, short circuits, or winding damage. These conditions can compromise the operational efficiency of the motor and may lead to overheating or complete failure if not addressed.

Understanding that resistance measurements help assess the health of motor components, a significant drop indicates a deviation from normal operating conditions, warranting further investigation. In contrast, normal wear and tear generally leads to gradual changes rather than sudden drops. Calibration is usually related to adjustments rather than resistance changes, and a drop in resistance is not a sign of improvement, as it suggests a deterioration of motor integrity instead.