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Electrical Transformers


Harmonic Problems in Power Transformers

Preventing malfunction in power transformers BY ANDY SAGL, Megger Harmonics are another power quality phenomenon that can cause equipment to malfunction. Harmonics are a sinusoidal component of periodic waves that have frequencies that are multiples of the fundamental frequency. Harmonics can cause...

Transformer Core Grounds

Transformer core grounds: a different path to maintaining insulation systems BY JAMES WHITE, Shermco Industries, Inc. Power transformers are usually supplied with a ground from the core of the transformer to the tank (earth/ground). Smaller, dry-type transformers may not have this ground, but it...

Distribution Transformer Loss Costs

A car owner must make some important decisions when purchasing a new vehicle—particularly if he or she has not bought one in decades. The features of the hundreds of 2015 models available can seem overwhelming. The budget-conscious owner, considering factors such as fuel efficiency,...

Electrical Transformers

Power lines protection

Trump Visits Georgia: Denial of Climate Crisis Post-Hurricane Helene

In a recent visit to Georgia following the devastating impacts of Hurricane Helene, former President Donald Trump made headlines by denying the reality of climate change. His remarks come at a time when communities are grappling with the aftermath of severe weather events, raising questions about leadership, accountability, and the future of climate policy in the United States.

The Context of Hurricane Helene

Hurricane Helene made landfall on the southeastern coast, causing extensive damage in...

Related Articles


Distribution Transformer Loss Costs

A car owner must make some important decisions when purchasing a new vehicle—particularly if he or she has not bought one in decades. The features of the hundreds of 2015 models available can seem overwhelming. The budget-conscious owner, considering factors such as fuel efficiency,...

Mirus International ULLTRA(TM) graph

Optimal Transformer Efficiency Using Weighted Average

In order to improve the efficiency of electrical distribution in commercial buildings, the US Department of Energy (DOE) introduced regulations with more stringent minimums on transformer efficiencies in January 2016. This was covered under the Code of Federal Regulations 10 CFR Part 431.192 and...

power plant

RMS Energy Responds to the Changing Engineering Needs of Customers

Today’s electrical infrastructure in the United States might have been viewed as a work of science fiction when the first commercial power grid was conceived and built in New York’s lower Manhattan in the 1880s. But it didn’t take long for fiction to become fact. Thomas...

Grounding Transformers Explained

By R. W. Hurst, Editor Grounding transformers are used to provide a path to ground for unbalanced load current and for fault currents on systems where a suitable ground is otherwise not available. Grounding transformers are normally constructed with one of the two configurations: Zig-Zag (Zn) with...


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