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Electrical Transformers


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...

Radiator Fin(s) Leak Repair

Radiator fins are notorious for leaking at various locations. One of which is where the fins are attached (welded) to the horizontal bottom-run header. Measurements are taken so a weir box can be installed to cover the fin(s) that are leaking. It is preferred the weir box will cover above the...

Industry and Education

As we see the electrical industry advance it is obvious the demographics will be challenged. The infrastructure investment needs of the electrical and renewable energy grid will reach the $billions$ over the next 15-20 years with expensive, complex and specialized training and education needs. ...

Electrical Transformers

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 has become more commonly known as DOE 2016. It improved on the previous regulation by requiring 30% lower losses at 35% loading which was determined to be the most common operating...

Related Articles


Industry and Education

As we see the electrical industry advance it is obvious the demographics will be challenged. The infrastructure investment needs of the electrical and renewable energy grid will reach the $billions$ over the next 15-20 years with expensive, complex and specialized training and education needs. ...

Electrical transformer design and manufacturing

Acutran Transformers: Built to Military Precision

Acutran is a veteran-owned custom designer and manufacturer of low- and medium-voltage dry-type transformers from 10VA to 3000kVA with voltages up to 25000V, inductors and reactors, and related components and services.The company was founded in 1983 and is now owned by Mike Evans, who is also the...


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