In my June column on pump and motor testing, I said that three-phase voltage variation and unbalance can have a significant effect on motor insulation life.
The term “testing” covers a range of processes. Parts supplied for motor manufacturing are tested as they are manufactured and when they arrive at the plant.
Bearing currents occur in specific motor and drive installations and can lead to motor fatigue and failure.
In last month’s column (Pumps & Systems, May 2014), the drawdown analysis
Even though most Winter Olympic venues are held in locations that are likely to have white winters, there is no guarantee that Mother Nature will deliver.
Previous articles in this series explained how oversized piping systems can have higher operating and maintenance costs.
Part One of this series in the March 2014 issue of Pumps & Systems
A proven tool to reduce energy consumption, variable frequency drives (VFDs) became increasingly used during the 1970s energy crisis.
A basic electrical safety rule is that water and electricity do not mix.
In 2011, I wrote a five-part series on alternating current (AC) motors and motor efficiency. This column will go into more detail about the impact of efficiency.
Many engineers and technicians in the motor control industry consider a programmable logic controller (PLC) a necessary component for variable frequency drive (VFD) control.
Today’s industrial marketplace uses many different machines—such as pumps, fans, compressors and conveyors. One machine that is often overlooked is the centrifuge.
More than ever, commercial building owners and industrial process users need to reduce their maintenance costs and achieve energy savings.
You have probably noticed that three-phase motors can have a varying number of leads exiting the junction box. The most common numbers are three, six, nine or twelve.
According to the Department of Energy, motor-driven equipment—such as pumps, fans and compressors—consume about 16 percent of the energy used in U.S.
A series of studies by the Institute of Electrical and Electronics Engineers, Inc.