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Green liquid filled padmounted transformer roped off for testing

November 15, 2022

Overview of the common tests performed on transformers, including Winding Resistance, Megger, Transformer Turns Ratio, Load-Loss, Leak Tests, and others.

How To's

November 1, 2022

Copper or aluminum transformer windings, which is right for your project? Compare efficiency, cost, weight, strength, and lifespan to find out which winding material makes the most sense for your application.

How To's

EC Electric contractor standing in front of three padmount transformers

March 16, 2026

When EC Electric had project deadlines threatened by delayed transformers, they turned to Maddox. Read what happened next.

Case Studies

technician handling tap changers on a low voltage dry type transformer

March 16, 2026

Learn how to install a low voltage dry-type transformer with this general guide covering wiring, primary tap settings, grounding, anchoring, and NEC compliance.

How To's

small dry-type transformer with exposed interior

March 4, 2026

Not sure whether to buy new or used? Learn what to expect when purchasing a dry-type transformer and how Maddox tests and warranties every unit for reliable performance.

Parts

substation transformer with cooling fans in yard

February 24, 2026

Explore substation transformers, power-class definitions, voltage ranges, and key design features used in transmission and distribution substations.

Parts

A Maddox 1000 kVA made in america padmount transformer

February 12, 2026

Maddox is donating a free American-made transformer (up to 1000 kVA) to support U.S. manufacturing startups and reindustrialization.

News

January 29, 2026

Learn what transformer bushings are, how they work, their two main types (dead-front and live-front bushings), and when each type works best in padmount and substation transformers.

Parts

A padmount transformer filled with FR3® Fluid being loaded on a truck

January 17, 2024

FR3® fluid is the go-to cooling fluid in transformers. Learn all about FR3® fluid, and why you should choose it over mineral oil for your transformer.

Parts

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Guide to Transformer Testing Standards

Aluminum vs. Copper Windings in Distribution Transformers

University Project Gets Padmounts Five Months Sooner

Guide to Installing Low Voltage Dry-Type Transformers

What to Expect When Buying a Used Dry-Type Transformer

Substation Transformer Guide: Design, Power Classes, and Grid Applications

Maddox Supports Reindustrialization with a Free American-Made Transformer Donation

Guide to Transformer Bushings

The Benefits of FR3® Fluid in Transformers