The pump industry is the largest purchaser of electric motors in the United States.
Due to the expense and labor required, most facilities need to maximize the life of their motors.
Most of us probably never notice the spinning cylinder mounted between the pump and motor, except how easy it is to dis/assemble when a pump or motor is changed out.
Due to the expense and labor required, most facilities need to maximize the life of their motors. Electrical, insulation resistance and thermal measurement are three tests that can troubleshoot motors, drives and associated electrical panels and prolong their operational lifetime. Thermal imagers can detect potential problems and insulation resistance and electrical tests can determine the cause.
An argument in favor of IEEE-841's provision for motor bearing protection.
One of the major impacts on motor life is common sense—or maybe the lack thereof!
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.
A paper or an electronic work order system can be used to capture alignment data.
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.
Why integrating vibration monitors with process controls provides fast response to pump faults, adds predictability and avoids unexpected shutdowns.
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.