Altran Corp.

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Crystal Lake, IL  |  815-455-5650

At Altran Corp., we specialize in the design, manufacturing, and testing of electric transformers for a wide range of industrial and commercial applications. With decades of experience behind us, we’ve built our reputation on engineering excellence, precision craftsmanship, and a deep commitment to innovation. Our product lineup spans custom and standard transformer solutions, including power transformers, distribution transformers, and specialized units built to perform in harsh or demanding environments. We bring a solutions-focused mindset to every project, working closely with our customers to ensure each transformer meets not only the technical specifications but also the performance and longevity expectations of their systems.

We operate with vertically integrated capabilities that allow us to control quality at every stage of production, from core winding and assembly to insulation and final testing. Our in-house engineering team leverages advanced modeling tools to optimize each design for thermal efficiency, electrical performance, and compact form factor. We also offer repair, refurbishment, and retrofitting services, helping customers extend the life of existing equipment and reduce downtime. Whether we’re supporting utility infrastructure, powering industrial automation, or supplying OEMs with built-to-spec units, we pride ourselves on delivering reliable, durable transformer solutions backed by technical expertise and responsive service.

Electric Transformers Power Pages

Electric Transformers

Electric Transformers

Electric transformers are static electrical machines that transform electric power from one circuit to the other without changing the frequency. An electrical transformer can increase or decrease the voltage with…

Isolation Transformers

Isolation Transformers

An isolation transformer, just like typical transformers, is a non-moving device that transmits electrical energy from one circuit to another without requiring any physical contact. It works on the idea of magnetic…

Plug-In Transformers

Plug-In Transformer

Plug-in transformers are class 2 power supplies that are intended for connections with 15 ampere, 120 or 240 volt alternating current (AC) branch circuits. The classification of class 2 power supplies comes from…

Power Transformer

Power Transformer

Power transformers are electrical instruments used in transmitting electrical power from one circuit to another without changing the frequency. They operate by the principle of electromagnetic induction. They are used in transmitting electrical power between…

Three-Phase Transformers

Three-Phase Transformers

An electrical transformer is a passive machine that transfers electrical energy from one circuit to another using a magnetic flux to induce an electromotive force. Transformers are used to increase (step-up) or decrease (step-down) voltages without changing the frequency of the electric current…

Toroidal Transformers

Toroidal Transformers

A toroidal transformer is a type of electrical transformer constructed with a torus or donut-shaped core. Its primary and secondary windings are wound across the entire surface of the torus core separated by an insulating material…

Types of Electric Transformers

Types of Electric Transformers

Electronically operated equipment depends on power transformers to convert electrical currents into voltage. Current transformers store and transport energy through power lines and grids…

Electric Coils

Electric Coils

An electric coil, or electromagnetic coil, is an electrical conductor that contains a series of conductive wires wrapped around a ferromagnetic core that is cylindrical, toroidal, or disk-like. Electric coils are one of the simplest forms of electronic components and provide…

High Voltage Power Supply

High Voltage Power Supply

By definition a power supply is a device that is designed to supply electric power to an electrical load. An electrical load refers to an electrical device that uses up electric power. Such a device can be anything from…

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