Efficient Plant October 2017 - 7
Why you should add
motor analysis to your
Four keys to understanding
motor efficiency, and causes
Electric motors transfer electrical power to
mechanical rotational forces that are the muscle
of the industrial world. Measuring and analyzing those forces-mechanical power, torque and
speed-as well as power quality characteristics are important to assessing performance of
rotating equipment. These measurements can
not only help predict failure and thus help avert
downtime, they can also help quickly determine
whether additional inspections, such as vibration
testing, shaft alignment analysis or insulation
testing, are needed to corroborate the findings.
Traditionally, obtaining accurate motor analysis
data required costly equipment shutdowns to
allow for the installation of mechanical sensors.
Not only can it be extremely difficult (and sometimes impossible) to properly install mechanical
sensors, the sensors themselves are often cost
prohibitive and introduce variables that decrease
overall system efficiency.
Modern motor analysis tools make it easier than
ever to troubleshoot direct on-line electric motors
by significantly simplifying the process and
reducing the number of components and tools
necessary to make critical maintenance decisions.
For instance, the new Fluke 438-II Power Quality and Motor Analyzer enables technicians to
discover electrical and mechanical performance
of electric motors, and evaluate power quality by
measuring the three-phase input to the motor,
without mechanical sensors.