What do resistance measurements of C to R = 4, C to S = 6.2, R to S = 10.2, and R to ground = 20.4 indicate when testing a motor?

The scenario describes resistance measurements that can provide insight into the condition of a motor’s windings. The measurements from different points suggest that there could be an issue with the winding itself, which is why identifying a bad winding is important.

In this case, the resistance between various points indicates a discrepancy that may suggest that the windings are not functioning as they should. A normal motor winding should show relatively low and uniform resistance values throughout its sections. If the values reflect significant variations or exceed expected readings, this can imply that there is a fault in one of the windings, leading to a situation where the winding may be damaged, broken, or otherwise compromised.

The resistance from C to R and other measurements illustrates how the circuit paths behave under resistance. If one of the windings is faulty, it will disrupt the expected resistance readings, confirming the diagnosis of a bad winding. This is crucial for troubleshooting, as it can help pinpoint issues that interfere with the motor's operational integrity.

Understanding resistance in this context is essential for diagnosing motor problems effectively. This measurement strategy can help maintain optimal functionality and prevent costly repairs or replacements by allowing for timely interventions when a winding issue is detected.