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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...

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,...

Overload Protection for Electric Motors

Thermal images are an easy way to identify apparent temperature differences in industrial three-phase electrical circuits, compared to their normal operating conditions. By inspecting the thermal differences of all three phases side-by-side, technicians can quickly spot performance anomalies on...

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:...

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...
Home Motors & Drives

Motors & Drives

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 available, thereby establishing the short circuit rating of electrical equipment.  Regardless of the size or voltage rating of a motor, it can be demonstrated that motor contribution is present...

Motors & Drives Articles

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Motors & Drives Videos

Vibro-Acoustic Testing applied to Circuit Breakers (On-line/Off-line)

HVI | PFT Series AC Hipots: Features and Benefits - T&D Channel

The Sediver Research Center English Version

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OMICRON MONTESTO 200

Analog & Digital Meters

Protector Relays

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Electricity Today T&D Magazine - March-April 2019 Issue

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2024 HVAC catalog Canada

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Electrical Transformer Testing Handbook, Vol. 7