Understanding the impedance of a three-phase motor can be of importance for maintaining performance and efficiency. Measuring the impedance of the windings can help detect issues such as short circuits, insulation problems, or damage to the windings. Furthermore, the impedance response over frequency provides information on high-frequency behavior of inverter driven motors. High-frequency currents can cause unwanted disturbances (EMI) and losses. Measuring the capacitance between the neutral point and the motor housing helps keep this capacitance low to maintain proper insulation, prevent current leakage, and protect the motor and connected systems.

Check out the application note below for detailed instructions on setting up the connection and configuring the Bode 100 for accurate impedance measurements on a three-phase motor.