Which of the following issues can be diagnosed with phase analysis instead of Motor Current Signature analysis?

Phase analysis is a method that allows for the assessment of the electrical characteristics of a system, particularly in three-phase systems. One of the most notable uses of phase analysis is to identify issues related to the resistive connections and imbalances in the electrical supply.

High resistance joints can create significant voltage drops across the joint, leading to variations in current flow that can be detected through phase analysis. This method evaluates the phase angles and magnitudes of currents and voltages in each phase, helping to shine a light on discrepancies that indicate potential high resistance in the connections.

In contrast, while Motor Current Signature analysis focuses on the motor’s operational characteristics and faults tied to its performance, it is less effective in pinpointing high resistance issues in electrical joints. Motor Current Signature analysis is more targeted toward diagnosing faults related to the motor itself, such as rotor bar failures or bearing issues. As such, resolving high resistance joints is more effectively achieved through phase analysis, which directly gauges electrical performance and integrity at the point of connection.