Datasheet

2 Fluke Corporation Fluke MDA-510 and MDA-550 Motor Drive Analyzer
The Fluke MDA-510 and MDA-550 Motor Drive
Analyzers use guided test measurements to make
analysis easier than ever
Drive input
Measure input voltage and current to quickly see whether values
are within acceptable limits by comparing the drive’s nominal
rated voltage to the actual supplied voltage. Then, check the input
current to determine if the current is within the maximum rating
and the conductors are suitably sized. You can also check whether
the harmonic distortion is within an acceptable level by visu-
ally inspecting the waveform shape or by viewing the harmonics
spectrum screen (MDA-550) which shows both the total harmonic
distortion and individual harmonics.
Voltage and current unbalance
Check the voltage unbalance at the input terminals so you can
ensure the phase unbalance is not too high (> 6-8 %), and that the
phase rotation is correct. You can also check the current unbalance,
as excessive unbalance may indicate a drive rectifier problem.
Extended harmonic measurements
Excessive harmonics are not just a threat to your rotating machines
but also to other equipment connected to the electrical power
system. The MDA-550 provides the ability to discover the harmon-
ics of the motor-drive but can also discover the possible effects of
inverter switching electronics. The MDA-550 has three harmonic
ranges, 1st to 51st Harmonics, 1 to 9 kHz and 9 kHz to 150 kHz
giving the ability to detect any harmonic pollution problems.
DC bus
In a motor-drive the conversion of AC to DC inside the drive is
critical, having the correct voltage and adequate smoothing with
low ripple is required for the best drive performance. High ripple
voltage may be an indicator of failed capacitors or incorrect sizing
of the connected motor. The record function of the MDA-500 Series
can be used to check DC bus performance dynamically in the oper-
ating mode while a load is applied.
Drive output
Check the output of the drive focusing both on voltage to frequency
ratio (V/F), and voltage modulation. When high V/F ratio measure-
ments are experienced, the motor may overheat. With low V/F
ratios, the connected motor may not be able to provide the required
torque at the load to sufficiently run the intended process.
Drive input step-by-step guided measurement
connections
Drive output waveform with auto triggering
Extended harmonics spectrum from 9 kHz to
150 kHz