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Improving Motor Maintenance Practices

Useful approaches to building an effective operation and maintenance program BY IAN CULBERT AND VICKI WARREN, Iris Power Engineering The pressures to be more competitive and cost-effective in today’s deregulated market have driven plants to reduce resources by making more informed,...

Enhance Performance with VFD Technology

Energy savings for pumping applications BY TOM NEUBERGER & STEVEN WESTON, Eaton In the early days of variable frequency drive (VFD) technology, the typical application was in process control for manufacturing synthetic fiber, steel bars and aluminum foil. Because VFD improved process...

Maximizing Electric Motor Efficiency

How to get the most from your rotating machines BY STEPHEN MANSFIELD, TechnoWise Inc. An area of great interest is improving the efficiency of electrical devices. More electric motor efficiency means less electrical energy consumed and thus less impact to the environment. By far, the largest...

Reviewing Electric Motor Reliability Research

What did the studies really say—then and now? BY HOWARD PENROSE, Ph.D., CMRP One of the most frequently quoted studies related to electric motor reliability is a 1983 Electric Power Research Institute (EPRI) project, entitled “Assessment of the Reliability of Motors in Utility Applications:...

Monitoring Stator Winding Deterioration

The importance of partial discharge testing in electric motors BY VICKI WARREN, Iris Power LLP Comparing partial discharge (PD) results obtained from a single machine is a valuable tool that enables companies to observe the gradual deterioration of a machine stator winding. Proper monitoring of...

Understanding Short Circuit Motor Contribution

A back to basics approach BY DARRELL BROUSSARD, GE Industrial Solutions An electric motor’s contribution is the current generated by a motor or motors during a short circuit condition. It represents a small but important value that is needed to determine the maximum short circuit current...
Home Motors & Drives

Motors & Drives

Overload Relays for Motor Protection

Improve system reliability and efficiency

BY KEVIN TRIMMER, Eaton Corporation

Nearly a third of global energy demand is attributable to manufacturing. Overall, the industry’s use of energy has grown by 61 percent between 1971 and 2004. According to the International Energy Agency (IEA) analysis, there are substantial opportunities to improve worldwide energy efficiencies.

More specifically, motor systems use more than 75 percent of a plant’s electricity. Driving energy efficiencies is more than being green. It...

Motors & Drives Articles

T&D Buyer’s Guide Companies

Motors & Drives Videos

Power Outages in the United States

Causes and Detection of Mechanical Failures in Power Transformers

About Dynamic Ratings

Motors & Drives Products

Spark P3 - Universal PD & EMI Analyzer

HVAC toughened glass insulator

Build-Your-Own Acorn, featuring OmniMax

Motors & Drives Shared Media

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Intelligent Power Today Issue 1

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CALCUATION OF TRANSMISISON LINE PARAMETERS WITH THE BOUNDARY ELEMENT METHOD

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Electrical Transformer Testing Handbook, Vol. 7