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motor testing

LumaSense Announces Luxtron LumaSMART, Smart Grid Ready Winding Hotspot Temperature Monitor

SANTA CLARA, CA—October 5, 2009 - LumaSense Technologies, a global leader of infrared temperature and gas measurement solutions, today announced the release of the Luxtron LumaSMART Winding Hotspot temperature monitor.

Diagnosing Rotor Bar Issues with Torque and Current Signature Analysis

by Drew Norman

Over the years rotor bar problems have been a diagnostic challenge for motor maintenance professionals. Now with current signature, spectral torque analysis and automated computer diagnostic software, defining rotor health problems has been made fairly simple. However, problems arise when professionals do not understand the underlying principles of the what’s, whys and how’s of dynamic rotor testing.

Defects in Nonceramic Insulators: Can They be Detected in a Timely Manner?

by S. Gorur and S. Sivasubramaniyam Department of Electrical Engineering, Arizona State University, Tempe, AZ, USA

This work was performed under a PSERC (Power Systems Engineering Research Center) funded project at Arizona State University

This paper is a continuation of the work reported during the Daycor users meeting. The electric field measurement method has been explored to determine its potential for timely detection of defects in nonceramic insulators. Various types of defects were simulated and the external electric field was computed. It is shown that the electric field method used presently is not sensitive enough to permit early detection of defective. There is a need for an improved method, perhaps periodic corona inspection could be the answer.

NEMA Publishes AB 4-2009 Guidelines for Inspection and Preventive Maintenance of Molded Case Circuit

(ROSSLYN, Va.)—The National Electrical Manufacturers Association (NEMA) has published NEMA AB 4-2009 Guidelines for Inspection and Preventive Maintenance of Molded Case Circuit Breakers Used in Commercial and Industrial Applications. The standard was last revised in 2003.

PdM of Mechanical Failures Using Electrical Measurements for Instantaneous Torque

by Ernesto J. Wiedenburg

Electric dynamic predictive maintenance is a field of continual rapid technology development. The same theoretical background, which made the first torque controlled VFDs possible, is now utilized to monitor the shaft torque by measuring only the stator currents and voltages. The first diagnostic use of the instantaneous torque signal as part of an off-the-shelf solution for field maintenance reached the market in 1999. In the last ten years, it has shown a dramatic increase in the quality of the information obtained over previously used techniques.

Artesis Flies High with BAA at Heathrow Airport

Artesis, leading supplier of intelligent predictive maintenance solutions, has secured a significant agreement to supply and install its market-leading Motor Condition Monitor (MCM) systems to all of the most critical escalators across 4 terminal buildings at Heathrow Airport.

A Cradle to Grave Approach - Motor Management at Its Best

by Noah Bethel, CMRP

Ask a motor manufacturer how long one of its motors is expected to live, and the response will be something like, "20-plus years in the right environment." Ask the same question in a facility that uses such a motor and the answer is more likely to be, "If we get five years out of it, we'll be happy!" Why does this discrepancy exist? Why do motors die of an infant mortality instead of living to the ripe old age for which they are designed and built? The answer has to do with the failure to optimize motor management and maintenance.

Extech Reports Record Growth: Tough Budgets Fuel Demand for Affordable Test & Measurement Tools

Waltham, MA - Extech Instruments, a subsidiary of FLIR Systems, Inc., (NASDAQ: FLIR) announced another year of sustained growth with record sales of $48 million in 2008. As a reflection of the economic downturn, Extech has witnessed a continued surge in demand for their wide range of handheld test and measurement equipment that offers quality and innovation at an affordable price.

NEMA Publishes Two Cable Standards

ROSSLYN, Va., April 16, 2009-The National Electrical Manufacturers Association (NEMA) has published RV 1-2008 Application and Installation Guidelines for Armored Cable (AC) and Metal-Clad (MC) Cable and RV 2-2008 Application and Installation Guidelines for Nonmetallic-Sheathed (NM-B) Cable and Underground Feeder and Branch (UF-B) Circuit Cable.

PdMA to Host AC/DC Motor Workshop

Are you responsible for maintaining, testing, troubleshooting, or repairing alternating and direct current motors? If you answered yes to any of these scenarios, then you cannot afford to miss the AC-DC Motor Operation and Maintenance Workshop instructed by Richard Love and hosted by PdMA Corporation from May 19-21 in sunny Tampa, Florida.

Adventures in Engineering Standards - Behind the Scenes of Creating IEEE Std 43-2000

by Howard W. Penrose, PhD, CMRP

Engineering can be a boring career with everyone working with known measurements and absolutes. There is never any doubt that the information contained in a standard or textbook is fact because everything is static, mathematical, and measurable. At least, that is what most people tend to think.

Maintaining The Long Term Reliability of Critical Power Systems in Water Processing Plants

By Reza Tajali
Schneider Electric

The critical applications in water and wastewater processing plants require uninterruptible power of a high quality. The most basic of these systems utilize automatic throw-over switches. The most advanced systems include UPS (Uninterruptible Power Supply) and generator equipment that maintain the continuity of power without one cycle of interruption.

motor testing

A Better Understanding of Rotor Dynamics and Support Stiffness

More Data Provides More Answers

Motor Repair or Replacement? Go Green

LumaSense Announces Luxtron LumaSMART, Smart Grid Ready Winding Hotspot Temperature Monitor

Diagnosing Rotor Bar Issues with Torque and Current Signature Analysis

Defects in Nonceramic Insulators: Can They be Detected in a Timely Manner?

Technology for Drying Impregnating Varnish of Electric Motor Developed

NEMA Publishes AB 4-2009 Guidelines for Inspection and Preventive Maintenance of Molded Case Circuit

PdM of Mechanical Failures Using Electrical Measurements for Instantaneous Torque

Jury finds reseller of electrical products guilty of selling counterfeit Square D circuit breakers

Free Power Quality CD-ROM