A large wastewater processing plant experienced continual problems with its influent raw wastewater pumps for several years.
It is impossible to balance line-to-line voltages perfectly in a three-phase circuit.
Mechanically generated sparks, electrostatic discharge and high surface temperatures are all potential ignition sources in explosive atmospheres.
Last September, we spoke about the importance of pipe-to-piping alignment, evaluating actual numbers, and tabulating stress values as they approach yield stress of pipe at various values of misalignment. This time, we will discuss the effects of pump-to-motor misalignment, beyond hype or generalities, by numerically quantifying the conclusions.
An argument in favor of IEEE-841's provision for motor bearing protection.
Shaft failures do not happen everyday, but when they do, it can be a challenge to determine the cause of failure. Here's a technical explanation of what happens when the shaft bends or breaks.
Last month we took a close look at the flow of voltage and current in purely resistive and inductive circuits.
In June, 2007, a reader asked Electrical Apparatus magazine, "How long should motor bearings last?" The answer will astound you.
Unanticipated noise and vibration can be problematic for both occupants and processes within structures.
In the past year, the rate of acceleration in the cost of raw materials (including steel, iron ore, copper and aluminum) has reached unprecedented levels in the pump and rotating equipment industries.
A paper or an electronic work order system can be used to capture alignment data.
Improvements in performance and energy reduction can be achieved with smart drives and system optimization.
Many people feel that all pump vibrations are bad, but is this a fact or only what we think is true?
When a motor fails, users can (1) rewind, possibly for high efficiency; (2) replace the failed motor with a new motor; or (3) invest in a premium efficiency product.
Energy efficiency and reduced consumption are important issues in the pump and motor marketplace.
How do I move from my situation to a better one? In other words, is it possible to retrofit a less-than-optimal installation with a better solution, and how?
When maintaining motors, proactive strategies are required.
Why integrating vibration monitors with process controls provides fast response to pump faults, adds predictability and avoids unexpected shutdowns.
New motor starting controller provides one solution.
The freefall in electric motor sales is a direct effect of the worldwide economic downturn, which has severely depressed industrial and commercial productions.