Fluke MDA-550 Specifications
TECHNICAL DATA
Fluke MDA-510 and MDA-550
Motor Drive Analyzer
Simplify complex motor-drive troubleshooting
with guided test setups and automated drive
measurements that provide reliable, repeatable test
results.
The new Fluke MDA 510 and MDA 550 Motor-Drive Analyzers save
time and eliminate the hassle of setting up complex measurements,
while simplifying the troubleshooting process. Simply select
a test and the step-by-step guided measurements show you
where to make voltage and current connections, while the preset
measurement profiles ensure you will capture all the data you
need for each critical motor-drive section—from the input to the
output, the DC bus, and the motor itself. From basic to advanced
measurements, the MDA-500 Series has you covered, and with
a built-in report generator you can quickly and easily generate
as-found, and as-left reports with confidence.
KEY MEASUREMENTS
Inverter output voltage, DC bus voltage and
ripple voltage, harmonics, unbalance
THREE POWERFUL TEST TOOLS IN
ONE
Motor-drive analyzer, waveform analyzer
and recording data logger all in one
HIGHEST SAFETY RATING IN THE
INDUSTRY
600 V CAT IV/1000 V CAT III rated for use at
the service entrance and downstream
The MDA-510 and MDA-550 are the ideal portable motor-drive
analysis test tools, and can help safely locate and troubleshoot
typical problems on inverter type motor-drive systems.
• Measure key motor-drive parameters including voltage,
current, DC Bus voltage level and AC ripple, voltage and current
unbalance and harmonics (MDA-550), voltage modulation, and
motor shaft voltage discharges (MDA-550).
• Perform extended harmonics measurements to identify the
effects of low and high order harmonics on your electrical power
system.
• Conduct guided measurements for motor-drive input, DC bus,
drive output, motor input and shaft measurements (MDA-550)
with graphical step-by-step voltage and current connection
diagrams.
• Use simplified measurement setup with preset measurement
profiles to automatically trigger data collection based on the
chosen test procedure.
• Create reports quickly and easily that are perfect for
documenting troubleshooting and collaborative work with
others.
• Measure additional electrical parameters with full 500 MHz
oscilloscope, meter and recording capability for complete range
of electrical and electronic measurement on industrial systems.
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 visually 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 harmonics 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.
Drive input step-by-step guided measurement
connections
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 operating 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 measurements 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 output waveform with auto triggering
Extended harmonics spectrum from 9 kHz to
150 k Hz
2 Fluke Corporation Fluke MDA-510 and MDA-550 Motor Drive Analyzer
Voltage modulation
Measurements of the Pulse Width Modulated signal are used to
check for high voltage peaks which can damage motor winding
insulation. The rise time or steepness of impulses is indicated by
the dV/dt reading (rate of voltage change over time), this should
be compared to the motor’s specified insulation. The measurements can also be used to measure switching frequency to identify
whether there is a potential issue with electronic switching, or
with grounding, where the signal floats up and down.
Motor input
Ensuring that voltage is being supplied at the motor input terminals is key, and the selection of cabling from drive to the motor
is critical. Incorrect cabling selection can result in both drive and
motor damage due to excessive reflected voltage peaks. Checking
that the current present at the terminals is within the motor rating
is important as over current condition could cause the motor to run
hot, decreasing the life of the stator insulation which can result in
the early failure of the motor.
Motor shaft voltage
Voltage pulses from a variable speed drive can couple from a
motor’s stator to its rotor, causing a voltage to appear on the rotor
shaft. When this rotor shaft voltage exceeds the insulating capacity of the bearing grease, flashover currents (sparking) can occur,
causing pitting and fluting of the motor bearing race, damage that
can cause a motor to fail prematurely. The MDA-550 Series analyzers are supplied with carbon fiber brush probe tips that can
easily detect the presence of destructive flashover currents, while
the impulse amplitude and count of events will enable you to take
action before failure occurs. The addition of this accessory and
capability of the MDA-550 allows you to discover potential damage
without investing in expensive permanently installed solutions.
Voltage modulation with zoom
Step-by-step guided measurements ensure you have the
data you need, when you need it
The MDA-500 Series is designed to help you quickly and easily
test and troubleshoot typical problems on three-phase and
single-phase inverter type motor-drive systems. The on-screen
information, and step-by-step setup guidance make it easy to configure the analyzer and get the drive measurements you need to
make better maintenance decisions, fast. From power input to the
installed motor, the MDA-500 provides the measurement capability
for the fastest motor-drive troubleshooting.
3 Fluke Corporation Fluke MDA-510 and MDA-550 Motor Drive Analyzer
Motor shaft voltage discharge event counts
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