Thank you for visiting one of our most popular classic articles. If you’d like to see updated information on this topic, please check out this recently published article, Transformer Calculations.

Note: This article is based on the 2020 NEC. A transformer transfers electrical energy (power) from one system to another by induction, with no physical connection between the two systems (other than ...

In the original version of this article, the second figure contained an error. The image has been updated. It’s important for engineers to have a good, working ...

A Load Tap Changer (LTC) failure can be catastrophic to the rest of the electric power system. SDMyers, a transfomer reliability company, estimates that about 40 percent of LTC-equipped transformer ...

Oregon-based heavy hauler Omega Morgan recently hauled one of the heaviest combination loads in Washington State history, weighing in at nearly 1 million pounds. Omega Morgan was tapped to transport a ...

AssetShield-protected transformers are designed to help utilities meet new security and resiliency standards for critical substations in the U.S. ABB has won orders from three major U.S. utilities for ...