Transformer Testing & Maintenance
Advancements in Dissolved Gas Analysis: Investigating Failure Cases
Advancements in Dissolved Gas Analysis: Data Quality
Transformer Testing & Maintenance

Sweep Frequency Response Analysis
Sweep frequency response analysis: Reliable demagnetization of transformer cores
BY MARKUS PÜTTER, MICHAEL RÄDLER, BORIS UNTERER, OMICRON electronics GmbH
Whenever a power or distribution transformer is isolated from the power system, it is very probable that residual magnetism remains in the core due to the phase shift. However, residual magnetism also occurs when performing winding resistance tests. Since manufacturers use these measurements in their routine testing and these tests are typically performed for on-site condition...
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