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April 12, 2025

Kirk Keys are mechanical interlocks that control access to electrical equipment. The interlock only releases the key when the proper conditions are met.

Parts

Transformer technician spraying padmount with TransArmour coating

February 17, 2025

Is your transformer in a corrosive environment? TransArmour and stainless steel protect against corrosion. In this article, we compare these two options.

Parts

A large pressure relief device (PRD) on a Maddox substation transformer

February 12, 2025

The difference between pressure relief and fault detection. How pressure relief devices (PRVs & PRDs) and fault detectors (IFDs & SPRs) protect transformers.

Parts

December 23, 2024

Wondering about the different parts of transformer windings & coils? Learn all about how windings work, different winding designs, & what's best for your unit.

Parts

A padmount transformer bayonet fuse link being removed

November 14, 2024

What is the difference between dual element, current sensing, 38kv, and high-amp transformer bayonet fuses? Learn which type of fuse you should get for your padmount transformer.

Parts

October 24, 2024

PCBs used to be used in transformer oil. Now, they're banned because of their harmful health effects. Modern transformers contain no traceable amount of PCBs.

Parts

August 1, 2024

Transformer inspection windows: viewing & IR windows provide a convenient and safe way to monitor a transformer's gauges and bushings without opening the cabinet.

Parts

Graphic showing an electrostatic shield on a wiring diagram

June 3, 2024

What is an E-shield? What does it do in a transformer? What kind of transformers need them? Find answers to these questions and more in our guide to E-shields.

Parts

November 13, 2023

Transformer cores ensure efficient magnetic coupling between the windings. Learn all about transformer core types, how they are constructed, and what they do.

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Parts

Guide to Kirk Keys Interlocks on Transformers

Transformer Corrosion Protection: Stainless Steel & TransArmour

Transformer Pressure Relief & Fault Detection Devices

Guide to Transformer Windings & Coils

Types of Bayonet Fuses: Dual Element, Current Sensing, etc...

Transformer PCBs: A guide for buying and selling

Guide to Transformer Inspection Windows: Viewing & IR Windows

Guide to Transformer Electrostatic Shields (E-shields)

Guide to transformer cores: types, construction, & purpose