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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.

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.

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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. Voltage variation is defined as the difference between the motor nameplate voltage and the incoming source voltage.

One of the supposed advantages of centrifugal pumps when compared to positive displacement pumps is their ability to operate across a wide flow range.

A reciprocating power pump, as depicted in Figure 1, is a displacement machine. It has characteristics that are different than a centrifugal pump.

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The global water crisis claims 5,500 lives each day—more than war, natural disasters, AIDS or hunger. It is a sobering problem but not an impossible one to solve.

SKF hosted their annual Technical Press Day on June 9, 2014, at Penske Headquarters in Mooresville, North Carolina. This was my first event to cover for Pumps & Systems, so I had a lot to learn! Here are a just a few of the things I picked up at press day.

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