Featured Stories
What Does Insulation Thermal Class Mean for Electrical Machines?
How hot is too hot? Motors and transformers have maximum operating conditions, but can I exceed those ratings on occasion and…
Kevin Alewine, Shermco Industries
Electromagnetic Imperfection Measurements for Stator Core Condition Assessment
The stator core of a rotating machine is composed of multiple stacked layers to minimize eddy current losses. A short between…
Fabian Oettl, OMICRON Technologies Italia, GmbH, and Mathieu Lachance, OMICRON electronics Canada
New Method to Inspect Motor/Generator Windings for Electrical Integrity
Measuring the winding resistance of generators and motors is one of the essential tests used in factory acceptance testing and during…
Edis Osmanbasic, DV Power, Sweden, and Normen Kaemena, Siemens Gamesa, Germany
Columnists
Ron Widup
Shermco Industries
NFPA 70E and NETA
Electrical and Thermal Burns: Why Is This an Important Topic in NFPA 70E?
Michael Labeit
249th Engineer Battalion, U.S. Army Corps of Engineers
In the FieldUsing Thermographic Surveys to Monitor Condition
Steven Turner
Arizona Public Service Company
Relay ColumnEvent Analysis: Overall Differential Tripping
Paul Chamberlain
American Electrical Testing Co. LLC
Safety Corner
Rotating Machinery Hazard Awareness
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In the Field column
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Industry Topics
High-Power Batteries as Power Source with Dynamic Resistance Measurement and Both Sides Grounded
Electrical arc phenomena have been studied for a long time. It is an inevitable process that occurs during interruption of high electrical currents (e.g., during a short circuit current interruption). The effects of the electrical arc on the circuit breaker ...
