Article 450, Part II provides the installation requirements for transformers. There are actually several sets of requirements, each of which pertains to a specific transformer configuration. Not ...

Article 450, Part I provides the general requirements for transformers. In the 2020 revision, Part 2 was titled “Specific Provisions Applicable to Different Types ...

Part 1 of this three-part series laid out an overview of a proposal to create a numerical health index and establish a practical program for power transformer maintenance. Part 2 breaks down each of ...

The first case study is about an on-site measurement on a 66kV to 132kV reference VT. The secondary winding has two taps for adapting the voltage ratio between 132kV/√3:110V/√3 and 66kV/√3:110V/√3.