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
NETA technicians are encouraged to share their stories via our “In the Field column, which explores real-world examples and challenges faced by the electrical testing industry today. Submit your stories by clicking below or learn more about how to submit additional articles.
In the Field column
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Industry Topics
Protection Considerations for an Improperly Installed On-Load Tap Changer
Large power transformers are widely used in the electrical grid, and interconnecting solar farms to the utility is one of their many applications. To control voltage variations throughout the day, an on-load tap changer (OLTC) is used to adjust the ...
