Motor Drive Analyzer
Navigation and User Interface
11
• Motor Shaft Voltage (MDA-550 only)
Use this function to detect bearing grease flash-over
currents that can damage motor bearings. These
problems can be caused by high shaft voltages due to
fast high voltage switching of the drive output circuit. A
brush on the tip of a probe measures the rotating shaft
voltage.
After you select a measurement location, select the specific
measurement with .
Some measurements require another submenu to select
the measurement method. As an example, for voltage and
current measurement on the motor drive input, select if the
measurement is done between 2 phases or between phase
and ground.
After a selection is complete, a connection diagram shows
how to connect the voltage probes and current clamps. See
Figure 3.
Figure 3. Connection Diagram
Push or NEXT to show the actual
measurement.
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