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# Rex Power Magnetics

Canadian dry-type transformer design and manufacturing company

## Sitemaps

- [XML Sitemap](https://www.rexpowermagnetics.com/sitemap.xml): Contains all public & indexable URLs for this website.

## Posts

- [Load Calculation of Transformer: A Complete Guide](https://www.rexpowermagnetics.com/knowledge-hub/load-calculation-of-transformer-a-complete-guide/) - Transformers are powering everything from homes to massive industrial complexes. The efficient operation is the load calculation of the transformer.
- [Isolation Transformer: Purpose, Functions, and Uses](https://www.rexpowermagnetics.com/knowledge-hub/isolation-transformer-purpose-functions-and-uses/) - The main purpose of an isolation transformer is to create a solid electrical barrier between the input and output circuits. Why is this so important?
- [Transformer Impedance: What It Means for Fault Current, Voltage Regulation, and System Design](https://www.rexpowermagnetics.com/knowledge-hub/impedance-in-transformers-key-concepts-and-calculations/) - Understand transformer impedance, how it’s calculated, and how it affects fault current, voltage regulation, and overall electrical system performance.
- [Seismic Certification of Dry-Type Transformers: What the Specification Actually Requires](https://www.rexpowermagnetics.com/knowledge-hub/seismic-certification-of-dry-type-transformers-what-the-specification-actually-requires/) - Seismic requirements show up on transformer specifications constantly, and they're among the most misunderstood lines in the document. A typical spec says something like "the transformer shall be designed for the seismic parameters of the installation location" — and stops there. The intent is clear. What's missing is any recognition of how seismic certification actually
- [How to Pick the Ideal Transformer for Your Power System](https://www.rexpowermagnetics.com/knowledge-hub/how-to-pick-the-ideal-transformer-for-your-power-system/) - Choosing the right transformer isn't just a routine task; it's a pivotal decision, akin to picking the ideal location or investing in essential machinery.
- [Why Do Transformers Hum? Understanding the Buzzing Sound](https://www.rexpowermagnetics.com/knowledge-hub/why-do-transformers-hum-understanding-the-buzzing-sound/) - The primary reason transformers produce sound is a phenomenon known as magnetostriction — a property of the silicon steel used in transformer cores.
- [Transformer Fuse Sizing: A Guide to Overcurrent Protection](https://www.rexpowermagnetics.com/knowledge-hub/transformer-fuse-sizing-a-guide-to-overcurrent-protection/) - Transformer fuse sizing is often misunderstood because it must account for unique transformer characteristics such as inrush current, thermal behavior, and impedance.
- [3-Phase Transformer Wiring Diagrams Explained](https://www.rexpowermagnetics.com/knowledge-hub/3-phase-transformer-wiring-diagrams-explained/) - A 3-phase transformer wiring diagram is a graphical representation of how transformer windings are connected on the primary and secondary sides.
- [Air Core vs. Iron Core Inductors: Top Key Differences](https://www.rexpowermagnetics.com/knowledge-hub/air-core-vs-iron-core-inductors-key-differences-and-applications/) - Inductance depends on both geometry and magnetic permeability. Air has very low permeability, while iron-based materials significantly increase it.
- [Air Core vs. Iron Core Inductors: Top Key Differences](https://www.rexpowermagnetics.com/knowledge-hub/air-core-vs-iron-core-inductors-key-differences-and-applications/) - Inductance depends on both geometry and magnetic permeability. Air has very low permeability, while iron-based materials significantly increase it.
- [Understanding Transformer Nameplates: Key Specifications](https://www.rexpowermagnetics.com/knowledge-hub/transformer-nameplate-guide/) - Transformer nameplates are often treated as simple identification labels—useful for confirming voltage or kVA during installation. Learn more.
- [Understanding Transformer Nameplates: Key Specifications](https://www.rexpowermagnetics.com/knowledge-hub/transformer-nameplate-guide/) - Transformer nameplates are often treated as simple identification labels—useful for confirming voltage or kVA during installation. Learn more.
- [Inside a Transformer: Key Components and How They Work](https://www.rexpowermagnetics.com/knowledge-hub/what-is-inside-a-power-transformer/) - Understanding what is inside a power transformer is essential for engineers, electricians, and purchasers to evaluate performance and application suitability.
- [Inside a Transformer: Key Components and How They Work](https://www.rexpowermagnetics.com/knowledge-hub/what-is-inside-a-power-transformer/) - Understanding what is inside a power transformer is essential for engineers, electricians, and purchasers to evaluate performance and application suitability.
- [DOE 2029 Efficiency Standards for Dry-Type Transformers: What's Changing and Why It Matters](https://www.rexpowermagnetics.com/knowledge-hub/doe-2029-efficiency-standards-for-dry-type-transformers-whats-changing-and-why-it-matters/) - In April 2024, the U.S. Department of Energy finalized amended energy conservation standards for distribution transformers — the most significant change to transformer efficiency regulation since the 2016 levels took effect. For anyone specifying, buying, or building dry-type transformers for installation in the United States, the new standards reshape what a compliant transformer looks like:
- [Transformer Considerations for EV Charging Infrastructure](https://www.rexpowermagnetics.com/knowledge-hub/transformer-considerations-for-ev-charging-infrastructure/) - The pattern that produces reliable EV charging infrastructure is the same as in any other power-electronic application: specify for the actual load.
- [Energy-Efficient Low Voltage Transformers: What to Look For](https://www.rexpowermagnetics.com/knowledge-hub/energy-efficient-low-voltage-transformers-what-to-look-for/) - Low voltage transformers are becoming crucial parts of industrial, commercial, and residential systems as energy efficiency propels advancements
- [Transformer Turns Ratio: Formula, Meaning, and How to Use It](https://www.rexpowermagnetics.com/knowledge-hub/turns-ratio-of-a-transformer-formula/) - Learn the transformer turns ratio formula, how to calculate TTR using primary and secondary voltage or winding turns, and why accurate TTR matters.
- [Transformers Design: How to Size and Select a Transformer](https://www.rexpowermagnetics.com/knowledge-hub/transformers-design-how-to-size-and-select-a-transformer/) - Proper transformer sizing and configuration improve reliability and performance. Learn the key transformer design considerations for your system.
- [Transformer Windings: Design, Function and Performance](https://www.rexpowermagnetics.com/knowledge-hub/transformer-windings-design-function/) - Transformer windings are at the heart of transformer operation. Winding design is therefore one of the most critical aspects of transformer engineering.
- [Short-Circuit Withstand Capability of Dry Type Transformers](https://www.rexpowermagnetics.com/knowledge-hub/short-circuit-withstand-capability-of-dry-type-transformers/) - A technical review of short-circuit withstand capability in dry type transformers, including fault force development, impedance impact.
- [Low-Ambient Temperature Considerations for Dry-Type Transformers](https://www.rexpowermagnetics.com/knowledge-hub/low-ambient-temperature-considerations-for-dry-type-transformers/) - In low-ambient applications, long-term reliability is determined less by steady-state temperature rating but by disciplined storage and commissioning practices.
- [Low-Ambient Temperature Considerations for Dry-Type Transformers](https://www.rexpowermagnetics.com/knowledge-hub/low-ambient-temperature-considerations-for-dry-type-transformers/) - In low-ambient applications, long-term reliability is determined less by steady-state temperature rating but by disciplined storage and commissioning practices.
- [VPI vs. Cast Coil Transformers: How to Choose Between Them](https://www.rexpowermagnetics.com/knowledge-hub/vpi-vs-cast-coil-transformers/) - A low voltage transformer is an electrical device that steps down high voltage to low voltage. This is typically used where electrical loads require a safer.
- [Passive Harmonic Filters Explained: Improving Power Quality](https://www.rexpowermagnetics.com/knowledge-hub/passive-harmonic-filters-explained-improving-power-quality/) - This article explains how passive harmonic filters work, why they are used, and how they contribute to more reliable electrical systems. Learn more.
- [Passive Harmonic Filters Explained: Improving Power Quality](https://www.rexpowermagnetics.com/knowledge-hub/passive-harmonic-filters-explained-improving-power-quality/) - This article explains how passive harmonic filters work, why they are used, and how they contribute to more reliable electrical systems. Learn more.
- [Understanding the K-Factor of Transformers and Harmonics](https://www.rexpowermagnetics.com/knowledge-hub/understanding-the-k-factor-of-transformers-and-harmonics/) - Harmonic currents cause extra transformer heating. Learn how K-rated dry-type transformers handle harmonics, what K-factors mean, and how to choose the right unit.
- [Electrostatic Shields in Transformers: Solving Noise Issues ](https://www.rexpowermagnetics.com/knowledge-hub/electrostatic-shields-in-transformers-solving-noise-issues/) - Electrostatic shields are used to address this specific coupling mechanism. Their function is misunderstood, leading to over-specification or misapplication.
- [Electrostatic Shields in Transformers: Solving Noise Issues ](https://www.rexpowermagnetics.com/knowledge-hub/electrostatic-shields-in-transformers-solving-noise-issues/) - Electrostatic shields are used to address this specific coupling mechanism. Their function is misunderstood, leading to over-specification or misapplication.
- [Partial Discharge in Dry-Type Transformers: Causes and Mitigation ](https://www.rexpowermagnetics.com/knowledge-hub/partial-discharge-in-dry-type-transformers-causes-and-mitigation/) - Partial discharge (PD) is one of the most important indicators of insulation condition in dry type transformers. Its significance is long-term reliability.
- [Partial Discharge in Dry-Type Transformers: Causes and Mitigation ](https://www.rexpowermagnetics.com/fr/non-classifiee/partial-discharge-in-dry-type-transformers-causes-and-mitigation/) - Découvrez les causes des décharges partielles dans les transformateurs à sec, les méthodes de détection et les stratégies pour réduire les risques.
- [Step-Up Dry-Type Transformers: Applications and Specification Essentials](https://www.rexpowermagnetics.com/knowledge-hub/step-up-dry-type-transformers-applications-and-specification-essentials/) - A step-up transformer raises voltage from primary to secondary by way of more turns on the secondary winding. As voltage increases, current decreases.
- [Step-Up Dry-Type Transformers: Applications and Specification Essentials](https://www.rexpowermagnetics.com/knowledge-hub/step-up-dry-type-transformers-applications-and-specification-essentials/) - Découvrez les applications des transformateurs à sec élévateurs, leurs critères de sélection et les spécifications essentielles pour votre système.
- [Rex Completes first phase of Operational Scale Up](https://www.rexpowermagnetics.com/news/rex-completes-first-phase-of-operational-scale-up/) - REX Power Magnetics achève la première phase de son expansion opérationnelle afin d’accroître ses capacités de fabrication et soutenir la demande.
- [Rex Completes first phase of Operational Scale Up](https://www.rexpowermagnetics.com/news/rex-completes-first-phase-of-operational-scale-up/) - REX Power Magnetics completes the first phase of its operational scale-up, expanding manufacturing capabilities to support growing demand.
- [Transformer Impedance Matching: Concepts, Tolerances, and Practical Application](https://www.rexpowermagnetics.com/knowledge-hub/transformer-impedance-matching/) - Impedance matching affects how load current is shared, how voltages behave under load, and how reliably transformers operate over time. Learn more.
- [Reverse Feeding a Transformer: When It Works and When It Doesn’t](https://www.rexpowermagnetics.com/knowledge-hub/reverse-feeding-a-transformer-when-it-works-and-when-it-doesnt/) - A distribution transformer built to step 480 V down to 208 V should also work in reverse. This article tells what occurs when you reverse-feed a transformer.
- [BIL Ratings: Why Insulation Class Matters More Than People Think](https://www.rexpowermagnetics.com/knowledge-hub/bil-ratings-why-insulation-class-matters-more-than-people-think/) - This article covers what BIL actually measures, how the IEEE and CSA standards organize the available ratings, when to specify above the standard minimum.
- [Wye vs. Delta: Connection Choices and What They Mean in Practice](https://www.rexpowermagnetics.com/knowledge-hub/wye-vs-delta-connection-choices-and-what-they-mean-in-practice/) - This article walks through what the two most common configurations — delta-wye and wye-delta — actually do, how grounding works in each.
- [Custom vs. Standard Transformers: When the Catalog Doesn't Have What You Need](https://www.rexpowermagnetics.com/knowledge-hub/custom-vs-standard-transformers-when-the-catalog-doesnt-have-what-you-need/) - This article covers when custom transformers are genuinely the right answer, what the practical realities of specifying and buying custom actually look like.
- [Motor Starting Autotransformer: How Reduced-Voltage Starting Helps Protect Large Motors](https://www.rexpowermagnetics.com/knowledge-hub/motor-starting-autotransformer-how-reduced-voltage-starting-helps-protect-large-motors/) - The autotransformer starter is one of the oldest and still one of the most effective methods. This article covers how the method works, the calculations, etc.
- [Power Quality Issues in Industrial Facilities and How Transformers Help](https://www.rexpowermagnetics.com/knowledge-hub/electrical-power-quality-and-transformers/) - Electrical Power quality is a broad subject, but for most industrial sites two issues dominate: harmonic distortion and transient overvoltages. Learn more.
- [How Transformers Work: Working Principle, Components, and System Role](https://www.rexpowermagnetics.com/knowledge-hub/how-transformers-work-working-principle-components-and-system-role/) - A transformer transfers electrical energy between two circuits through a magnetic field, while changing the voltage level. The frequency stays the same.
- [How Transformers Work: Working Principle, Components, and System Role](https://www.rexpowermagnetics.com/knowledge-hub/how-transformers-work-working-principle-components-and-system-role/) - A transformer transfers electrical energy between two circuits through a magnetic field, while changing the voltage level. The frequency stays the same.
- [Mini Power Centers Explained: When Integrated Distribution Makes Sense](https://www.rexpowermagnetics.com/knowledge-hub/mini-power-centers-explained-when-integrated-distribution-makes-sense/) - Most low-voltage distribution gets built up from discrete components. This article covers what an MPC is, where it fits, and how to think about the choice.
- [RC Snubbers for Transformer Protection: Working Principle and Design](https://www.rexpowermagnetics.com/knowledge-hub/rc-snubbers-for-transformer-protection-working-principle-and-design/) - The RC snubber is the standard mitigation. This article explains the working principle and walks through a complete sizing example for a dry-type transformer.
- [Transformer Taps and Tap Changers: How They Work and When to Use Them](https://www.rexpowermagnetics.com/knowledge-hub/transformer-tap-changers-purpose-operation-and-practical-use/) - This article explains the purpose of transformer taps, how tap changers operate, and how they are used in practical applications. Learn more.
- [Transformer Taps and Tap Changers: How They Work and When to Use Them](https://www.rexpowermagnetics.com/knowledge-hub/transformer-tap-changers-purpose-operation-and-practical-use/) - This article explains the purpose of transformer taps, how tap changers operate, and how they are used in practical applications. Learn more.
- [How to Calculate kVA for Transformer Sizing](https://www.rexpowermagnetics.com/knowledge-hub/how-is-transformer-kva-calculated-a-guide-to-proper-transformer-sizing/) - This article explains how transformer kVA is calculated, provides practical formulas for single-phase and three-phase systems. Learn more.
- [Transformer Rating Explained: What You Need to Know About Transformer Capacity](https://www.rexpowermagnetics.com/knowledge-hub/transformer-rating-explained/) - Learn what transformer rating is, how it is established, and what engineers should evaluate when translating nameplate capacity into a reliable specification.
- [Transformer Commissioning: Critical Checks for Safe Energization](https://www.rexpowermagnetics.com/knowledge-hub/transformer-commissioning-critical-checks-for-safe-energization/) - Transformer commissioning is the final engineering control point before a unit is placed into service. It is where installation quality, system compatibility.
- [Transformer Commissioning: Critical Checks for Safe Energization](https://www.rexpowermagnetics.com/knowledge-hub/transformer-commissioning-critical-checks-for-safe-energization/) - Transformer commissioning is the final engineering control point before a unit is placed into service. It is where installation quality, system compatibility.
- [Transformer Paralleling: Principles and Practical Considerations](https://www.rexpowermagnetics.com/knowledge-hub/transformer-paralleling-principles-and-practical-considerations/) - Parallel operation depends on several parameters being aligned within tight limits, and small mismatches produce disproportionate problems.
- [Transformer Paralleling: Principles and Practical Considerations](https://www.rexpowermagnetics.com/knowledge-hub/transformer-paralleling-principles-and-practical-considerations/) - Parallel operation depends on several parameters being aligned within tight limits, and small mismatches produce disproportionate problems.
- [Rex Power Magnetics vous informe de l’avancement du projet d’expansion](https://www.rexpowermagnetics.com/news/rex-power-magnetics-announces-plans-and-progress-towards-expansion-of-production-capacity/) - Rex Power Magnetics poursuit sa lancée pour améliorer la productivité et la capacité globale. Cette année, une nouvelle installation de 60 000 pieds carrés viendra s’ajouter à côté de l’usine actuelle située à Concord, en Ontario. Cet ajout permettra l’augmentation de la capacité de production et diminuera les délais de livraison des transformateurs de moyenne
- [How Transformers Are Constructed: A Deep Dive into the Process](https://www.rexpowermagnetics.com/knowledge-hub/how-transformers-are-constructed-a-deep-dive-into-the-process/) - For dry type transformers in particular, construction is not just a manufacturing process. It is a series of tightly controlled design and assembly decisions.
- [Dry-Type vs. Liquid-Filled Transformers: A Comprehensive Comparison](https://www.rexpowermagnetics.com/knowledge-hub/dry-type-vs-liquid-filled-transformers-a-comprehensive-comparison/) - The two dominant categories—dry-type and liquid-filled transformers—are not interchangeable solutions. Each is optimized for specific environments.
- [Pending Tariff Action](https://www.rexpowermagnetics.com/news/pending-tariff-action/) - Information regarding pending Canadian protectionist measures & the effect on transformer prices The Federal Government of Canada has announced that it intends to apply a 25% surtax on imports of steel and aluminum from China, effective October 15th, 2024. This bulletin covers the effect this will have on transformer pricing and Rex’s measures to mitigate
- [Understanding Short Circuit Testing of Transformers: A Step-by-Step Guide](https://www.rexpowermagnetics.com/knowledge-hub/short-circuit-testing-of-transformers/) - This article explains what short circuit testing is, what it verifies, and how it is performed, with a focus on practical interpretation for engineers.
- [VFD Variable Frequency Drives Explained: A Full Guide](https://www.rexpowermagnetics.com/knowledge-hub/vfd-variable-frequency-drives-explained-why-drive-isolation-transformers-are-essential/) - This article explains how VFDs work, the electrical challenges they introduce, and why drive isolation transformers are essential. Learn more.
- [How to Calculate Transformer Fault Current: Power System Design Considerations](https://www.rexpowermagnetics.com/knowledge-hub/how-to-calculate-transformer-fault-current-power-system-design-considerations/) - This article explains the basic formulas, shows worked examples, and highlights the design considerations that matter in real installations. Learn more.
- [Transformer Fault Current Calculation Explained: Methods and Formulas](https://www.rexpowermagnetics.com/knowledge-hub/transformer-fault-current-calculation/) - Performing a proper transformer fault current calculation ensures that protective devices are correctly rated and can withstand short-circuit conditions.
- [Transformer Grounding and Bonding Explained: Key Principles](https://www.rexpowermagnetics.com/knowledge-hub/transformer-grounding-and-bonding-explained/) - Understanding transformer grounding and bonding is therefore essential for engineers, electricians, and facility managers involved in system installation.
- [The Role of Transformers in Energy Efficiency and Power Loss Reduction](https://www.rexpowermagnetics.com/knowledge-hub/the-role-of-transformers-and-ways-to-save-on-electricity-bill/) - Transformers operate continuously in most electrical systems, often for decades at a time. Even small improvements in transformer performance can reduce energy.
- [Lightning and Surge Protection for Transformers: Arresters & Coordination](https://www.rexpowermagnetics.com/knowledge-hub/lightning-and-surge-protection-for-transformers/) - This article explains the fundamentals of transformer surge protection, with particular attention to arrester selection. Learn more here.
- [What Is an Autotransformer? Simple Explanation, Diagram, and Uses](https://www.rexpowermagnetics.com/knowledge-hub/what-is-an-autotransformer/) - An autotransformer is a transformer that uses a single continuous winding to perform voltage transformation. Learn more about the details here.
- [Transformer Electrical Symbols: A Guide to Transformer Symbols in Electrical Diagrams](https://www.rexpowermagnetics.com/knowledge-hub/transformer-electrical-symbols/) - This article provides a practical guide to common transformer electrical symbols, what they represent, and how to interpret them in electrical diagrams.
- [Transformer Polarity Explained: Polarity of a Transformer and Why It Matters](https://www.rexpowermagnetics.com/knowledge-hub/transformer-polarity-explained/) - This article explains transformer polarity in practical terms and highlights why it must be verified before transformers are energized or interconnected.
- [Autotransformer vs. Isolation Transformer: Pros, Cons, and When to Use Each](https://www.rexpowermagnetics.com/knowledge-hub/autotransformer-vs-isolation-transformer/) - This article explains the key differences between autotransformers and isolation transformers, outlines their advantages and limitations. Learn more.
- [Equivalent Circuit of a Transformer Explained: How It Models Real Transformer Losses](https://www.rexpowermagnetics.com/knowledge-hub/circuit-of-a-transformer-explained/) - This article explains the transformer equivalent circuit in practical terms and shows how it represents transformer losses without resorting to excessive maths.
- [Cast Coil Transformers: Reliable and Durable Solutions for Modern Power Systems](https://www.rexpowermagnetics.com/knowledge-hub/cast-coil-transformers-reliable-and-durable-solutions/) - A cast coil transformer uses epoxy resin encapsulation to insulate and protect the windings—most commonly the high-voltage winding. Learn more here.
- [Transformer Grounding: Understanding the Importance of Proper Transformer Neutral Grounding](https://www.rexpowermagnetics.com/knowledge-hub/transformer-grounding-understanding-the-importance/) - Transformer neutral grounding refers to the intentional connection of a transformer’s neutral point—typically on the secondary winding—to ground.
- [Neutral Grounding Reactors: Ensuring Safe Ground Fault Protection](https://www.rexpowermagnetics.com/knowledge-hub/neutral-grounding-reactors-ensuring-safe-and-controlled-ground-fault-protection/) - This article explains how Neutral Grounding Reactors function, where they are applied, and why air-core construction is required for reliable performance.
- [Harmonic Mitigating Transformers: How to Improve Power Quality](https://www.rexpowermagnetics.com/knowledge-hub/harmonic-mitigating-transformers-how-to-improve-power-quality/) - Modern electrical systems contain a concentration of non-linear loads. How creating harmonic distortion reduces efficiency and stresses upstream equipment.
- [Transformer Clearance Requirements: Ensuring Safe and Code-Compliant Installations](https://www.rexpowermagnetics.com/knowledge-hub/transformer-clearance-requirements/) - Clearances around dry-type transformers play a central role in ensuring proper operation, electrical safety. Electrical codes are mandatory to maintain security.
- [Understanding Transformer Insulation Classes: Importance, Types, and Standards](https://www.rexpowermagnetics.com/knowledge-hub/understanding-transformer-insulation-classes/) - Dry-type transformers are built to recognized standards such as IEEE C57.12.01, IEEE C57.12.91, and CSA C9. Find the most common insulation classes here.
- [Transformer Inrush Current Explained: Causes, Effects, and Reduction Techniques](https://www.rexpowermagnetics.com/knowledge-hub/transformer-inrush-current-explained-causes-effects-and-reduction-techniques/) - This article explains what causes inrush current and practical methods. Transformer inrush is a transient event that requires an important consideration.
- [The Manufacturing Process of VPI/VPE Power Transformers: Understanding Vacuum Pressure Impregnation](https://www.rexpowermagnetics.com/knowledge-hub/the-manufacturing-process-of-vpi-vpe-power-transformers-understanding-vacuum-pressure-impregnation/) - This article explains the VPI and VPE manufacturing processes, their advantages, particularly applied in Rex Power Magnetics dry-type power transformers.
- [Understanding Losses in Transformers: Types, Causes, and Impact on Efficiency](https://www.rexpowermagnetics.com/knowledge-hub/understanding-losses-in-transformers/) - Understanding the types, causes, magnitude of transformer losses is essential for optimizing performance and specifying units that balance energy efficiency.
- [Power Transformer Testing: Ensuring Quality, Reliability, and Compliance](https://www.rexpowermagnetics.com/knowledge-hub/power-transformer-testing/) - Power transformers are critical components in electrical distribution systems, and their reliability impacts the performance and safety of the entire network.
- [Thermal Management in Dry-Type Transformers: Cooling Methods and Classes](https://www.rexpowermagnetics.com/knowledge-hub/thermal-management-in-dry-type-transformers-cooling-methods-and-classes/) - Dry-type transformers rely on air as the cooling medium through natural convection or forced circulation. Get the cooling methods and temperature rise limits.
- [Understanding Harmonics in Power Systems: IEEE 519 Guidelines Explained](https://www.rexpowermagnetics.com/knowledge-hub/understanding-harmonics-in-power-systems-ieee-519-guidelines-explained/) - This article explains what harmonics are, the limits set by IEEE 519, and how practical design and mitigation measures keep power systems efficient.
- [Types of Transformers Explained - An Ultimate Guide](https://www.rexpowermagnetics.com/knowledge-hub/types-of-transformers-explained-an-ultimate-guide/) - Transformers are essential components in electrical systems, allowing the efficient transmission and distribution of electrical energy. Learn more.
- [Power Transformer Design and Key Specifications](https://www.rexpowermagnetics.com/knowledge-hub/power-transfomer-design-and-key-specifications/) - Transformers are essential parts of electrical systems because they make it easier for electrical energy to move between circuits with varying voltages.
- [The Role of Design, Environment, and Load in Transformer Lifespan](https://www.rexpowermagnetics.com/knowledge-hub/the-role-of-design-environment-and-load-in-transformer-lifespan/) - The lifespan of a transformer depends on various factors, the type of transformer, the environment in which it operates, and how well it is maintained.
- [Why K-Factor Rated Transformers Are Critical for Modern Electrical Loads](https://www.rexpowermagnetics.com/knowledge-hub/why-k-factor-rated-transformers-are-critical-for-modern-electrical-loads/) - Where do K-factor-rated transformers come in? This post is all about K-factor transformers: what they do, why they matter. So, let's jump in!
- [Dry-Type vs. Liquid-Filled Transformers: A Comprehensive Comparison](https://www.rexpowermagnetics.com/knowledge-hub/dry-type-vs-liquid-filled-transformers-a-comprehensive-comparison/) - Transformers are central to electrical power systems, enabling voltage to be stepped up for transmission and stepped down for utilization. While the operating principle is consistent across designs, the method of insulation and cooling introduces meaningful differences in performance, installation, and lifecycle behavior. The two dominant categories — dry-type and liquid-filled transformers — are not
- [How Transformers Are Constructed: A Deep Dive into the Process](https://www.rexpowermagnetics.com/knowledge-hub/how-transformers-are-constructed-a-deep-dive-into-the-process/) - Transformers are fundamental to electrical infrastructure, enabling efficient transmission and controlled distribution of power across virtually every sector. While the operating principle is well understood, the construction of a transformer is often less visible — and significantly more complex than it appears from the outside. For dry-type transformers in particular, construction is not just a
- [Understanding Short Circuit Testing of Transformers: A Step-by-Step Guide](https://www.rexpowermagnetics.com/knowledge-hub/short-circuit-testing-of-transformers/) - Short circuit testing is one of the most important validation steps in transformer design and manufacturing. While routine electrical tests confirm ratio, polarity, and losses, short circuit testing evaluates how the transformer behaves under the most mechanically and thermally stressful conditions it will ever experience. For dry-type transformers, this is particularly critical. Unlike liquid-filled units,
- [VFD Variable Frequency Drives Explained: A Full Guide](https://www.rexpowermagnetics.com/knowledge-hub/vfd-variable-frequency-drives-explained-why-drive-isolation-transformers-are-essential/) - Variable Frequency Drives (VFDs) are widely used in modern industrial and commercial power systems to control motor speed, improve process control, and reduce energy consumption. By adjusting the frequency and voltage supplied to a motor, VFDs enable precise speed regulation and improved operational efficiency. However, VFDs also introduce electrical characteristics that can negatively affect the
- [How to Calculate Transformer Fault Current: Power System Design Considerations](https://www.rexpowermagnetics.com/knowledge-hub/how-to-calculate-transformer-fault-current-power-system-design-considerations/) - A transformer fault current calculation is one of the first steps in short-circuit analysis. It affects equipment interrupting ratings, bus bracing, protection coordination, and arc-flash studies. In practical terms, the available short-circuit current is highest closest to the source transformer and decreases as conductor and upstream source impedance are added downstream. For most facility-level work,
- [Transformer Rating Explained: What You Need to Know About Transformer Capacity](https://www.rexpowermagnetics.com/knowledge-hub/transformer-rating-explained/) - When engineers, contractors, and facility teams discuss transformer “capacity,” they are usually referring to the transformer’s rating. In practice, that sounds simple: a 500 kVA transformer can supply 500 kVA of load. But the real meaning of transformer rating is more nuanced. Capacity is not just a nameplate number. It is the result of thermal
- [Line Reactors vs. Transient Filters: Understanding Their Roles in VFD Systems](https://www.rexpowermagnetics.com/knowledge-hub/line-reactors-vs-transient-filters-understanding-their-roles-in-vfd-systems/) - Variable Frequency Drives (VFDs) have become an essential part of modern power and motor control systems. VFD efficiency also depends on multiple factors.
- [Transformer Fault Current Calculation Explained: Methods and Formulas](https://www.rexpowermagnetics.com/knowledge-hub/transformer-fault-current-calculation/) - Understanding available fault current is essential for safe and reliable power system design. When a short circuit occurs, the magnitude of current that flows is largely determined by transformer impedance and system configuration. Performing a proper transformer fault current calculation ensures that protective devices are correctly rated and that equipment can withstand short-circuit conditions. Engineers
- [How to Calculate kVA for Transformer Sizing](https://www.rexpowermagnetics.com/knowledge-hub/how-is-transformer-kva-calculated-a-guide-to-proper-transformer-sizing/) - Transformer sizing starts with one number: kVA. Get the kVA right and the transformer will run within its design limits for decades. Get it wrong and the consequences show up as overheating, accelerated insulation aging, or — in the opposite direction — wasted capital on capacity that never gets used. The math itself is straightforward.
- [Transformer Failures: Causes, Faults, and Prevention Tips](https://www.rexpowermagnetics.com/knowledge-hub/transformer-failures-causes-faults-and-prevention-tips/) - Learn about the main causes and fault types in dry-type transformer failures. This technical guide explains thermal, electrical, and environmental failure mechanisms and outlines proven prevention and maintenance practices.
- [Rex Power Magnetics Announces Plans and Progress Towards Expansion of Production Capacity](https://www.rexpowermagnetics.com/news/rex-power-magnetics-announces-plans-and-progress-towards-expansion-of-production-capacity/) - Rex Power Magnetics is building on its momentum for enhancing productivity and overall capacity. This year, a new 60,000 square foot facility is being brought online. This factory is immediately adjacent to our main plant in Concord, Ontario. This addition will enable greater throughput and shorter lead times for Medium Voltage Power Transformers, as well
- [Transformer Maintenance: Essential Checklist and Industry Standard](https://www.rexpowermagnetics.com/knowledge-hub/transformer-maintenance-essential-checklist-and-industry-standard/) - Keep your transformers reliable with this essential maintenance checklist. Learn inspection steps, test procedures, and industry standards for dry-type power transformers.

## Pages

- [Home](https://www.rexpowermagnetics.com/) - Custom dry-type transformers, designed and built in Canada for over 50 years. CSA-certified testing on every unit. Tested to UL, IEEE, and CSA standards.
- [Transformer kVA Calculator](https://www.rexpowermagnetics.com/resources/calculator/transformer-kva-calculator/)
- [Transformer kVA Calculator](https://www.rexpowermagnetics.com/resources/calculator/kva-calculator/) - Quickly calculate the kVA requirements for your transformer application with the REX kVA Calculator and plan your electrical system with confidence.
- [Produits](https://www.rexpowermagnetics.com/products/) - Explorez les transformateurs, réactances et solutions magnétiques REX conçus pour répondre aux exigences des applications industrielles modernes.
- [Contactez-nous](https://www.rexpowermagnetics.com/contact/) - Contactez REX Power Magnetics pour discuter de vos besoins en transformateurs, obtenir de l’aide technique ou en savoir plus sur nos solutions.
- [Carrières](https://www.rexpowermagnetics.com/careers/) - Explorez les possibilités de carrière chez REX Power Magnetics et joignez-vous à une équipe spécialisée dans les solutions électriques et magnétiques.
- [Actualités](https://www.rexpowermagnetics.com/news/) - Découvrez les dernières nouvelles de REX Power Magnetics, notamment les innovations, projets, développements et mises à jour de l’entreprise.
- [À propos de nous](https://www.rexpowermagnetics.com/about/) - Découvrez REX Power Magnetics, notre expertise en conception et fabrication de transformateurs et notre engagement envers la qualité et l’innovation.
- [Home](https://www.rexpowermagnetics.com/) - Découvrez les transformateurs et solutions magnétiques de REX Power Magnetics, conçus sur mesure pour des applications industrielles exigeantes.
- [Mentions légales](https://www.rexpowermagnetics.com/legal/) - Accédez aux informations juridiques de REX Power Magnetics, notamment les conditions d’utilisation et la politique de confidentialité.
- [Politique de confidentialité](https://www.rexpowermagnetics.com/legal/privacy-policy/) - Consultez la politique de confidentialité de REX Power Magnetics pour savoir comment vos renseignements personnels sont recueillis et protégés.
- [Conditions d'utilisation](https://www.rexpowermagnetics.com/legal/terms-of-use/) - Consultez les conditions régissant l’accès et l’utilisation du site Web, du contenu et des ressources en ligne de REX Power Magnetics.
- [Conditions générales](https://www.rexpowermagnetics.com/terms-conditions/) - Consultez les conditions générales de REX Power Magnetics concernant les ventes, garanties, livraisons, retours et annulations.
- [Politique d'annulation](https://www.rexpowermagnetics.com/terms-conditions/cancellation-policy/) - Consultez la politique d’annulation de REX Power Magnetics et les conditions applicables à l’annulation des commandes.
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- [Responsabilité du fret](https://www.rexpowermagnetics.com/terms-conditions/freight-responsibility/) - Consultez les conditions de REX Power Magnetics relatives au transport, à l’expédition et à la responsabilité liée à la livraison des produits.
- [Garantie limitée](https://www.rexpowermagnetics.com/terms-conditions/limited-warranty/) - Consultez les modalités de la garantie limitée de REX Power Magnetics, notamment la couverture, les conditions et les limitations applicables.
- [General Conditions of Sale](https://www.rexpowermagnetics.com/terms-conditions/general-conditions-of-sale/) - Consultez les conditions générales de vente de REX Power Magnetics concernant les commandes, les prix, les paiements et les livraisons.
- [Privacy Policy](https://www.rexpowermagnetics.com/legal/privacy-policy/) - Read the REX Power Magnetics privacy policy to learn how personal information is collected, used, protected and managed.
- [Terms of Use](https://www.rexpowermagnetics.com/legal/terms-of-use/) - Review the terms governing access to and use of the REX Power Magnetics website, its content, services and related online resources.
- [Cancellation Policy](https://www.rexpowermagnetics.com/terms-conditions/cancellation-policy/) - Review the REX Power Magnetics cancellation policy, including applicable conditions and requirements for cancelling orders.
- [Return Policy](https://www.rexpowermagnetics.com/terms-conditions/return-policy/) - Review the REX Power Magnetics return policy for information about product returns, applicable conditions and return requirements.
- [Freight Responsibility](https://www.rexpowermagnetics.com/terms-conditions/freight-responsibility/) - Review REX Power Magnetics' freight responsibility terms and important information regarding product shipping, delivery and transportation.
- [Limited Warranty](https://www.rexpowermagnetics.com/terms-conditions/limited-warranty/) - Review REX Power Magnetics' limited warranty terms, including warranty coverage, conditions, limitations and applicable product requirements.
- [General Conditions of Sale](https://www.rexpowermagnetics.com/terms-conditions/general-conditions-of-sale/) - Review the general conditions of sale governing orders, pricing, payment, delivery and other commercial transactions with REX Power Magnetics.
- [Chariot](https://www.rexpowermagnetics.com/request-quote/) - Demandez un devis à REX Power Magnetics pour des transformateurs à sec, des réactances et des solutions électriques sur mesure.
- [Documentation](https://www.rexpowermagnetics.com/resources/product-documentation/) - Consultez la documentation technique, les guides et les spécifications des transformateurs, réactances et autres produits REX.
- [Frequently Asked Questions](https://www.rexpowermagnetics.com/resources/faq/) - Trouvez des réponses aux questions fréquentes sur les transformateurs à sec, les réactances, les spécifications et les applications.
- [Frequently Asked Questions](https://www.rexpowermagnetics.com/resources/faq/) - Find answers to frequently asked questions about dry-type transformers, reactors, specifications, applications, customization and more.
- [Certifications](https://www.rexpowermagnetics.com/resources/certifications/) - Consultez les certifications et documents de conformité de REX Power Magnetics, notamment ISO, CSA, ABS, RoHS et qualifications sismiques.
- [Certifications](https://www.rexpowermagnetics.com/resources/certifications/) - Review REX Power Magnetics certifications and quality standards supporting safe, reliable and high-performance transformer solutions.
- [Data Centers](https://www.rexpowermagnetics.com/industries/data-centers/) - Explore data center transformers engineered for reliable, efficient power distribution, harmonic mitigation and continuous operation.
- [Data Centers](https://www.rexpowermagnetics.com/industries/data-centers/) - Explore data center transformers engineered for reliable, efficient power distribution, harmonic mitigation and continuous operation.
- [Accessibilité](https://www.rexpowermagnetics.com/accessibility/) - Découvrez l'engagement de REX Power Magnetics envers l'accessibilité de ses informations, produits et services.
- [Agent Locator](https://www.rexpowermagnetics.com/agent-locator/) - Need help selecting a transformer? Find your local REX Power Magnetics representative and connect with an expert for product and project support.
- [Documentation](https://www.rexpowermagnetics.com/resources/product-documentation/) - Access REX transformer documentation, product catalogs, manuals and technical information for distribution, power and control transformers.
- [Order Tracking](https://www.rexpowermagnetics.com/order-tracking/) - Looking for your transformer order? Use REX order tracking to check your order information and stay updated on your purchase.
- [Order Tracking](https://www.rexpowermagnetics.com/order-tracking/) - Looking for your transformer order? Use REX order tracking to check your order information and stay updated on your purchase.
- [Legal](https://www.rexpowermagnetics.com/legal/) - Review legal information, policies and important terms related to the REX Power Magnetics website, products and services.
- [Customer Support](https://www.rexpowermagnetics.com/customer-support/) - Get technical and product support from REX Power Magnetics. Find the information and expert assistance you need to keep your project moving.
- [Accessibility](https://www.rexpowermagnetics.com/accessibility/) - Learn about REX Power Magnetics' commitment to accessibility and our efforts to provide inclusive access to our products, services and information.
- [Cart](https://www.rexpowermagnetics.com/request-quote/) - Have a transformer project in mind? Submit your requirements and request a quote from REX Power Magnetics for a solution built around your needs.
- [Enclosure Drawings](https://www.rexpowermagnetics.com/resources/enclosure-drawings/) - Access REX transformer enclosure drawings and dimensions to simplify specification, planning and installation for your next project.
- [Resources](https://www.rexpowermagnetics.com/resources/) - Find transformer documentation, drawings, certifications, calculators and technical resources to help specify the right REX solution.
- [Industries](https://www.rexpowermagnetics.com/industries/) - From data centers and EV charging to mining and marine applications, discover transformer solutions engineered around your industry's demands.
- [Products](https://www.rexpowermagnetics.com/products/) - Explore REX dry-type transformers and power magnetic products engineered for industrial, commercial, and utility applications. Find the right solution today.
- [Calculators](https://www.rexpowermagnetics.com/resources/calculator/) - Use Rex Power Magnetics’ transformer calculator to convert kVA ↔ amps, size single- and three-phase transformers, and estimate primary/secondary currents
- [About Us](https://www.rexpowermagnetics.com/about/) - Learn about Rex Power Magnetics — a Canadian manufacturer of high-quality dry-type transformers for industrial, commercial, and utility applications. Trusted since 1972 for engineering excellence, reliability, and custom design expertise.
- [Centre de connaissances](https://www.rexpowermagnetics.com/knowledge-hub/) - Please, find the top news and blog articles here about power transformers.
- [Plans D'Enceintes](https://www.rexpowermagnetics.com/resources/enclosure-drawings/)
- [Calculateur de Transformateur](https://www.rexpowermagnetics.com/resources/calculator/)
- [Configurateur de Produit](https://www.rexpowermagnetics.com/resources/product-configurator/)
- [Service Maritime](https://www.rexpowermagnetics.com/industries/marine-duty/)
- [Énergie Temporaire](https://www.rexpowermagnetics.com/industries/temporary-power/)
- [Exploitation Minière](https://www.rexpowermagnetics.com/industries/mining/)
- [Qualité de l'énergie](https://www.rexpowermagnetics.com/industries/power-quality/)
- [Stockage d'énergie](https://www.rexpowermagnetics.com/industries/energy-storage/) - Rex Power Magnetics conçoit et fabrique des transformateurs de type sec pour les systèmes de stockage d'énergie par batterie (BESS). Conçu pour l'efficacité, la sécurité et la fiabilité dans les applications de stockage d'énergie renouvelable et connectée au réseau
- [Recharge des véhicules électriques](https://www.rexpowermagnetics.com/industries/ev-charging/)
- [Product Configurator](https://www.rexpowermagnetics.com/resources/product-configurator/) - Design your custom dry-type transformer with Rex Power Magnetics’ online configurator. Choose ratings, voltages, enclosures, and options to generate a tailored solution for your application.
- [Careers](https://www.rexpowermagnetics.com/careers/) - Explore career opportunities at Rex Power Magnetics. Join Canada’s leading manufacturer of custom dry-type transformers and build your future in engineering, manufacturing, and innovation.
- [Temporary Power](https://www.rexpowermagnetics.com/industries/temporary-power/) - Temporary power transformers for construction, events, and rental fleets. Type 4/4X enclosures, quick-connect, multi-voltage. Built in Canada by Rex.
- [Power Quality](https://www.rexpowermagnetics.com/industries/power-quality/) - Power quality transformers, reactors, and harmonic filters for IEEE 519 compliance. Harmonic mitigating and K-factor rated designs. Built in Canada by Rex.
- [EV Charging](https://www.rexpowermagnetics.com/industries/ev-charging/) - Custom EV charging transformers for Level 2 and DC fast-charging stations. Engineered for harmonic loads and continuous-duty operation. Built in Canada by Rex.
- [Marine Duty](https://www.rexpowermagnetics.com/industries/marine-duty/) - Rex Power Magnetics designs and manufactures dry-type marine transformers for marine, offshore, and coastal applications. Engineered for corrosion resistance, reliability, and safety in harsh marine environments.
- [Mining](https://www.rexpowermagnetics.com/industries/mining/) - Mining transformers for vibration, dust, and Class I Div 2 environments. Encapsulated and mini power center options. Built in Canada by Rex.
- [Energy Storage](https://www.rexpowermagnetics.com/industries/energy-storage/) - Custom energy storage transformers for grid-scale BESS, commercial storage, and behind-the-meter applications. High round-trip efficiency. Built in Canada by Rex.
- [Your Drawing Request Has Been Submitted](https://www.rexpowermagnetics.com/drawing-request-submitted/) - Can’t find a drawing for your specific catalogue number or voltage combination? No problem — our engineering team is here to help. Your request has been successfully submitted. Thank you — we’ll review your details and get back to you shortly with the drawing you need.
- [Knowledge Hub](https://www.rexpowermagnetics.com/knowledge-hub/) - Explore the Rex Power Magnetics Knowledge Hub — your source for transformer education, FAQs, and engineering insights. Learn about dry-type design, power quality, and custom transformer solutions.
- [Contact](https://www.rexpowermagnetics.com/contact/) - Contact Rex Power Magnetics — Canada’s leading manufacturer of custom dry-type transformers. Request a quote or speak with our technical team today.
- [News](https://www.rexpowermagnetics.com/news/) - Stay up to date with the latest news from Rex Power Magnetics — including product launches, certifications, and industry insights from Canada’s leading transformer manufacturer.
- [Thank You for Getting in Touch!](https://www.rexpowermagnetics.com/thank-you-for-getting-in-touch/) - We appreciate you reaching out to us. Your message has been received, and one of our team members will get back to you as soon as possible.
- [Secteurs](https://www.rexpowermagnetics.com/industries/)
- [Customer Support](https://www.rexpowermagnetics.com/customer-support/)
- [Sales Support](https://www.rexpowermagnetics.com/fr/sales-support/)
- [Get a quote](https://www.rexpowermagnetics.com/get-a-quote/) - RAPID QUOTE REQUEST Search by part number lookup (distribution class products only) or use the custom product forms. You can add multiple items to your cart and review the total bill of materials. After submitting the quote request, a local agent or distributor will contact you with pricing.
- [Agents](https://www.rexpowermagnetics.com/agent-locator/)
- [Obtenez un devis](https://www.rexpowermagnetics.com/get-a-quote/) - DEMANDE DE DEVIS RAPIDE Recherchez par numéro de pièce (produits de classe de distribution uniquement) ou utilisez les formulaires de produits personnalisés. Vous pouvez ajouter plusieurs articles à votre panier et consulter la nomenclature totale. Après avoir soumis la demande de devis, un agent ou un distributeur local vous contactera pour vous communiquer les prix.
- [Terms & conditions](https://www.rexpowermagnetics.com/terms-conditions/) - These Conditions of Sale apply to all Rex Power Magnetics products unless other terms have been expressly agreed to in writing by Rex Power Magnetics. All sales transactions are subject to the latest published General Conditions of Sales of Rex Power Magnetics and to any special Conditions of Sale which may be contained in applicable
- [Ressources](https://www.rexpowermagnetics.com/resources/)

## Products

- [Transformateurs de mise à la terre zigzag/étoile-triangle](https://www.rexpowermagnetics.com/product/neutral-grounding-transformers/) - Découvrez les transformateurs de mise à la terre du neutre REX conçus pour assurer une mise à la terre fiable et limiter les défauts dans les réseaux électriques.
- [Transformateurs d'isolement à usage général](https://www.rexpowermagnetics.com/product/general-purpose-isolation-transformer/) - Découvrez les transformateurs d’isolement à usage général REX, conçus pour assurer une isolation électrique fiable et protéger les équipements sensibles.
- [R.C. Snubbers](https://www.rexpowermagnetics.com/product/r-c-snubber/) - R.C. snubbers are used in transformer and power equipment protection to soften switching surges during breaker operations, motor starts, and load changes.
- [Industrial Control Transformers](https://www.rexpowermagnetics.com/product/industrial-control-transformer/) - Rex Power Magnetics provides durable industrial automation control transformers that ensure smooth operations with stable voltage, preventing costly downtime.
- [Cast Coil Power Transformers](https://www.rexpowermagnetics.com/product/cast-coil-power-transformer/) - Cast coil transformers with solid epoxy encapsulation for high reliability in harsh, contaminated environments.
- [VPI/VPE Power Transformers](https://www.rexpowermagnetics.com/product/vpi-vpe-power-transformer/) - VPI and VPE power transformers offering moisture resistance, thermal endurance, and superior dry-type performance.
- [AC Line/Load Reactors](https://www.rexpowermagnetics.com/product/ac-line-load-reactor/) - AC line and load reactors designed to improve power quality, reduce harmonics, and protect sensitive electrical equipment.
- [Transformateurs de Contrôle Industriel](https://www.rexpowermagnetics.com/product/industrial-control-transformer/) - Industrial control transformers are used to convert the available supply voltage to the voltage that is required to supply industrial control circuits.
- [Transformateurs de puissance de contrôle moyenne tension](https://www.rexpowermagnetics.com/product/medium-voltage-control-power-transformers/) - Medium Voltage Control Power Transformers (CPT) are single phase transformers used to supply control power in medium voltage switchgear and transformers.
- [Autotransformateurs de démarrage de moteur](https://www.rexpowermagnetics.com/product/motor-starting-autotransformers/) - Motor starting autotransformers are transformers used in the autotransformer starting of a industrial motors. Here are autotransformer starting of motors.
- [Réacteurs de ligne/charge CA](https://www.rexpowermagnetics.com/product/ac-line-load-reactor/) - AC line/load Inductors are designed to reduce harmonics caused by variable frequency drives. Absorbing power line disturbances, reactors can protect inverters.
- [Filtres transitoires de protection du moteur](https://www.rexpowermagnetics.com/product/motor-guarding-transient-filter/) - The steep voltage wave fronts produce high frequency effects which may damage the insulation of motors operated by the equipment. Learn more
- [Réacteurs à noyau d'air](https://www.rexpowermagnetics.com/product/air-core-reactor/) - Air-Core reactors provide a linear impedance with respect to current which is crucial in many applications where an iron core reactor would otherwise saturate.
- [Transformateurs d'isolement d'entraînement](https://www.rexpowermagnetics.com/product/drive-isolation-transformer/) - Drive Isolation Transformers are designed for supplying power to SCR motor drives which provide convenient variable speed motor control and can save on energy.
- [Autotransformateurs](https://www.rexpowermagnetics.com/product/autotransformer/) - Autotransformers are transformers which have a single winding per phase. Using an autotransformer is an economical and compact means to a power supply.
- [Transformateurs de puissance VPI/VPE](https://www.rexpowermagnetics.com/product/vpi-vpe-power-transformer/) - Vacuum Pressure Impregnated (VPI) power transformers utilize an open winding design, providing the windings a degree of protection against moisture.
- [Transformateurs d'atténuation des harmoniques](https://www.rexpowermagnetics.com/product/harmonic-mitigating-transformers/) - Harmonic Mitigating Transformers are specially designed for non-linear loads which draw significant amounts of harmonic current. Learn more.
- [Transformateurs encapsulés](https://www.rexpowermagnetics.com/product/encapsulated-transformer/) - Encapsulated Transformers are designed for applications where the environmental conditions would not permit a general purpose ventilated dry type transformer.
- [Transformateurs pour emplacements dangereux](https://www.rexpowermagnetics.com/product/hazardous-location-transformer/) - Rex Power Magnetics has been designing and producing a line of dry type transformers for Hazardous Locations and Harsh Industrial Environments. Learn more.
- [Mini centres électriques](https://www.rexpowermagnetics.com/product/mini-power-center/) - Mini Power Centers combine three individual components, prewired into one NEMA 3R enclosure: a single-phase or three-phase dry-type encapsulated transformer.
- [Amortisseur RC](https://www.rexpowermagnetics.com/product/r-c-snubber/) - R.C. snubbers are a passive electrical devices, comprised of appropriately selected resistors and capacitors to protect medium voltage power transformers.
- [Transformateurs de puissance à bobine moulée](https://www.rexpowermagnetics.com/product/cast-coil-power-transformer/) - Cast coil power transformers feature primary and secondary windings which are vacuum cast inside a solid block of epoxy resin. Learn more here.
- [Transformateurs à facteur K](https://www.rexpowermagnetics.com/product/k-factor-rated-transformer/)
- [Encapsulated Transformers](https://www.rexpowermagnetics.com/product/encapsulated-transformer/) - Encapsulated transformers offering durable, moisture-resistant performance for harsh and contaminated environments.
- [K-Factor Rated Transformers](https://www.rexpowermagnetics.com/product/k-factor-rated-transformer/) - K-factor rated transformers designed to handle non-linear loads and reduce overheating in harmonic-rich environments.
- [Medium Voltage Control Power Transformers](https://www.rexpowermagnetics.com/product/medium-voltage-control-power-transformers/) - Medium voltage control power transformers built for safety, performance, and long-term reliability in switchgear and substation systems.
- [Grounding Transformers](https://www.rexpowermagnetics.com/product/neutral-grounding-transformers/) - Neutral grounding transformers provide a controlled ground reference for three-phase systems. Their core function is to establish a stable neutral point.
- [Hazardous Location Transformers](https://www.rexpowermagnetics.com/product/hazardous-location-transformer/) - Hazardous location transformers CSA/UL approved for Class I, Division 2, Groups A–D environments.
- [Mini Power Centers](https://www.rexpowermagnetics.com/product/mini-power-center/) - Compact mini power centers combining transformer, protection, and distribution for efficient local power delivery.
- [Drive Isolation Transformers](https://www.rexpowermagnetics.com/product/drive-isolation-transformer/) - Drive isolation transformers for reliable VFD performance, harmonic mitigation, and transient protection.
- [Autotransformers](https://www.rexpowermagnetics.com/product/autotransformer/) - Compact, efficient autotransformers for voltage adjustment and system interconnection in industrial power applications.
- [General Purpose Isolation Transformers](https://www.rexpowermagnetics.com/product/general-purpose-isolation-transformer/) - General purpose isolation transformers providing safe, efficient voltage transformation and electrical noise isolation.
- [Motor Starting Autotransformers](https://www.rexpowermagnetics.com/product/motor-starting-autotransformers/) - Motor starting autotransformers for reduced-voltage motor starts, minimizing inrush current and extending equipment life.
- [Motor Guarding Transient Filters](https://www.rexpowermagnetics.com/product/motor-guarding-transient-filter/) - Motor guarding transient filters protect motors from voltage spikes and dv/dt stress in VFD-driven systems.
- [Air Core Reactors](https://www.rexpowermagnetics.com/product/air-core-reactor/) - Air core reactors for current limiting, neutral grounding, harmonic filtering, and reliable power quality improvement.
- [Harmonic Mitigating Transformers](https://www.rexpowermagnetics.com/product/harmonic-mitigating-transformers/) - Harmonic mitigating transformers with phase-shifting and flux cancellation for cleaner, more efficient power systems.

## Agents

- [EMSI Inc.](https://www.rexpowermagnetics.com/agent/emsi-inc-11/)
- [EMSI Inc.](https://www.rexpowermagnetics.com/agent/emsi-inc-10/)
- [EMSI Inc.](https://www.rexpowermagnetics.com/agent/emsi-inc-9/)
- [EMSI Inc.](https://www.rexpowermagnetics.com/agent/emsi-inc-8/)
- [EMSI Inc.](https://www.rexpowermagnetics.com/agent/emsi-inc-7/)
- [EMSI Inc.](https://www.rexpowermagnetics.com/agent/5762/)
- [EMSI Inc.](https://www.rexpowermagnetics.com/agent/emsi-inc-6/)
- [EMSI Inc.](https://www.rexpowermagnetics.com/agent/emsi-inc-5/)
- [EMSI Inc.](https://www.rexpowermagnetics.com/agent/emsi-inc-4/)
- [EMSI Inc.](https://www.rexpowermagnetics.com/agent/emsi-inc-2/)
- [EMSI Inc.](https://www.rexpowermagnetics.com/agent/emsi-inc-3/)
- [Composite Power Group](https://www.rexpowermagnetics.com/agent/composite-power-group/)
- [No Sales Rep - Please contact our USA Sales Manager](https://www.rexpowermagnetics.com/agent/hawaii/) - Tel: +52 555 837 7716 Mx 508 Beverly Hills Ln Edinburg, TX 78542 www.lareps.com
- [Advance Electrical Agency Ltd.](https://www.rexpowermagnetics.com/agent/advance-electrical-agency-ltd/)
- [FGR Group](https://www.rexpowermagnetics.com/agent/fgr-group-2/)
- [SierraWestron Inc.](https://www.rexpowermagnetics.com/agent/sierrawestron-inc-2/)
- [FGR Group](https://www.rexpowermagnetics.com/agent/fgr-group/) - Tel: +52 555 837 7716 Mx 508 Beverly Hills Ln Edinburg, TX 78542 www.lareps.com
- [Pioneer Sales Group Inc.](https://www.rexpowermagnetics.com/agent/pioneer-sales-group-inc-2/)
- [Mercer Sales Inc.](https://www.rexpowermagnetics.com/agent/mercer-sales-inc-2/)
- [Mercer Sales Inc.](https://www.rexpowermagnetics.com/agent/mercer-sales-inc/) - Tel: +52 555 837 7716 Mx 508 Beverly Hills Ln Edinburg, TX 78542 www.lareps.com
- [Pioneer Sales Group Inc.](https://www.rexpowermagnetics.com/agent/pioneer-sales-group-inc/) - Tel: +52 555 837 7716 Mx 508 Beverly Hills Ln Edinburg, TX 78542 www.lareps.com
- [Integrated Component Sales Inc](https://www.rexpowermagnetics.com/agent/integrated-component-sales-inc-2/)
- [Integrated Component Sales Inc](https://www.rexpowermagnetics.com/agent/integrated-component-sales-inc/) - Tel: +52 555 837 7716 Mx 508 Beverly Hills Ln Edinburg, TX 78542 www.lareps.com
- [Southeast Electrical Representative Group, Inc.](https://www.rexpowermagnetics.com/agent/southeast-electrical-representative-group-inc-2/)
- [Southeast Electrical Representative Group, Inc.](https://www.rexpowermagnetics.com/agent/southeast-electrical-representative-group-inc/) - Tel: +52 555 837 7716 Mx 508 Beverly Hills Ln Edinburg, TX 78542 www.lareps.com
- [LaSalle Representatives LLC.](https://www.rexpowermagnetics.com/agent/lasalle-representatives-llc/) - Tel: +52 555 837 7716 Mx 508 Beverly Hills Ln Edinburg, TX 78542 www.lareps.com
- [LaSalle Representatives LLC.](https://www.rexpowermagnetics.com/agent/lasalle-representatives-llc-2/)
- [H.C. Zang Agency, Inc.](https://www.rexpowermagnetics.com/agent/h-c-zang-agency-inc/) - Tel: +52 555 837 7716 Mx 508 Beverly Hills Ln Edinburg, TX 78542 www.lareps.com
- [ASA Electrical Solutions](https://www.rexpowermagnetics.com/agent/asa-electrical-solutions-4/)
- [ASA Electrical Solutions](https://www.rexpowermagnetics.com/agent/asa-electrical-solutions-3/)
- [ASA Electrical Solutions](https://www.rexpowermagnetics.com/agent/asa-electrical-solutions-2/)
- [SierraWestron Inc.](https://www.rexpowermagnetics.com/agent/sierrawestron-inc/) - Tel: +52 555 837 7716 Mx 508 Beverly Hills Ln Edinburg, TX 78542 www.lareps.com
- [ASA Electrical Solutions](https://www.rexpowermagnetics.com/agent/asa-electrical-solutions/) - 2515 E. Thomas Rd. Suite 16-6 Phoenix, AZ 85016 Contact: Jon Scovel PH: 480-550-0415 e-mail: jon@hartlandsouthwest.com www.hartlandsouthwest.com
- [Brodwell Industrial Sales](https://www.rexpowermagnetics.com/agent/brodwell-industrial-sales/)
- [Integra Agencies Man. Ltd.](https://www.rexpowermagnetics.com/agent/integra-agencies-man-ltd/)
- [Brodwell Industrial Sales](https://www.rexpowermagnetics.com/agent/brodwell-industrial-sales-2/)
- [Vigilant Technical Sales Ltd.](https://www.rexpowermagnetics.com/agent/vigilant-technical-sales-ltd/)
- [Arbutus West Agency Ltd.](https://www.rexpowermagnetics.com/agent/arbutus-west-agency-ltd/)
- [Power Protection Products, Inc.](https://www.rexpowermagnetics.com/agent/power-protection-products-inc/) - Tel: +52 555 837 7716 Mx 508 Beverly Hills Ln Edinburg, TX 78542 www.lareps.com
- [Pioneer Engineering - For special multi-voltage 3Ø Auto Transformer](https://www.rexpowermagnetics.com/agent/pioneer-engineering-mohammad-zahid/) - Tel: +52 555 837 7716 Mx 508 Beverly Hills Ln Edinburg, TX 78542 www.lareps.com
- [EMSI Inc.](https://www.rexpowermagnetics.com/agent/emsi-inc/)
- [The Yanow Companies](https://www.rexpowermagnetics.com/agent/the-yanow-companies/) - Tel: +52 555 837 7716 Mx 508 Beverly Hills Ln Edinburg, TX 78542 www.lareps.com
- [Electro Specialties Sales Group](https://www.rexpowermagnetics.com/agent/electro-specialties-sales-group/) - Tel: +52 555 837 7716 Mx 508 Beverly Hills Ln Edinburg, TX 78542 www.lareps.com
- [Serge Maheu](https://www.rexpowermagnetics.com/agent/serge-maheu/)
- [Eric Turmel](https://www.rexpowermagnetics.com/agent/eric-turmel/)
- [Eric Massé](https://www.rexpowermagnetics.com/agent/eric-masse/)
- [Jean-François Després](https://www.rexpowermagnetics.com/agent/agence-beliveau-turmel-et-associes/)
- [Ontech Sales Inc.](https://www.rexpowermagnetics.com/agent/ontech-sales-inc/)
- [JB Snyder & Associates](https://www.rexpowermagnetics.com/agent/jb-snyder-associates/) - Tel: +52 555 837 7716 Mx 508 Beverly Hills Ln Edinburg, TX 78542 www.lareps.com
- [Integrated Power Systems](https://www.rexpowermagnetics.com/agent/integrated-power-systems/) - www.ipowersys.com Portland Office 17643 SW Pilkington Rd. Lake Oswego, OR 97035 PH: 503-640-3201 Seattle Office 1625 E. Marine View Dr. Everett, WA 98201 PH: 206-849-6800
- [Eisenhaur Industrial Solutions, LLC](https://www.rexpowermagnetics.com/agent/eisenhaur-industrial-solutions-llc/) - Tel: +52 555 837 7716 Mx 508 Beverly Hills Ln Edinburg, TX 78542 www.lareps.com
- [Robert W. Chapman & Co.](https://www.rexpowermagnetics.com/agent/robert-w-chapman-co/) - Tel: +52 555 837 7716 Mx 508 Beverly Hills Ln Edinburg, TX 78542 www.lareps.com
- [Jensenius Associates, Inc.](https://www.rexpowermagnetics.com/agent/jensenius-associates-inc/) - Tel: +52 555 837 7716 Mx 508 Beverly Hills Ln Edinburg, TX 78542 www.lareps.com
- [HasGo Power Equipment](https://www.rexpowermagnetics.com/agent/hasgo-power-equipment/) - Tel: +52 555 837 7716 Mx 508 Beverly Hills Ln Edinburg, TX 78542 www.lareps.com
- [Applied Controls, Inc.](https://www.rexpowermagnetics.com/agent/applied-controls-inc/) - Tel: +52 555 837 7716 Mx 508 Beverly Hills Ln Edinburg, TX 78542 www.lareps.com
- [Control Sales, Inc.](https://www.rexpowermagnetics.com/agent/control-sales-inc/) - Tel: +52 555 837 7716 Mx 508 Beverly Hills Ln Edinburg, TX 78542 www.lareps.com
- [UVD, Inc.](https://www.rexpowermagnetics.com/agent/uvd-inc/) - Tel: +52 555 837 7716 Mx 508 Beverly Hills Ln Edinburg, TX 78542 www.lareps.com
- [WD Engineering Sales](https://www.rexpowermagnetics.com/agent/wd-engineering-sales/) - Tel: +52 555 837 7716 Mx 508 Beverly Hills Ln Edinburg, TX 78542 www.lareps.com
- [ELP Marketing](https://www.rexpowermagnetics.com/agent/elp-marketing/)
- [No Sales Rep - Please contact our inside sales team.](https://www.rexpowermagnetics.com/agent/no-sales-rep-please-contact-our-inside-sales-team/)
- [Integra Agencies](https://www.rexpowermagnetics.com/agent/integra-agencies/)
- [Latin America Electrical Representatives.](https://www.rexpowermagnetics.com/agent/latin-america-electrical-representatives/) - Tel: +52 555 837 7716 Mx 508 Beverly Hills Ln Edinburg, TX 78542 www.lareps.com
- [Itecna S.A.](https://www.rexpowermagnetics.com/agent/itecna-s-a/)

## Tags

- [blog](https://www.rexpowermagnetics.com/tag/blog/)
- [news](https://www.rexpowermagnetics.com/tag/news/)
- [blog](https://www.rexpowermagnetics.com/tag/blog/)
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## Product Categories

- [Control & Automation](https://www.rexpowermagnetics.com/categories-product/control-automation/) - Power critical control and automation systems with reliable transformers built for demanding applications. Explore standard and custom solutions from REX.
- [Reactors & Filters](https://www.rexpowermagnetics.com/categories-product/reactors-filters/) - Protect equipment and improve power quality with REX reactors and filters engineered for demanding industrial electrical systems.
- [Low Voltage Distribution Transformers](https://www.rexpowermagnetics.com/categories-product/low-voltage-distribution-transformers/) - Explore low voltage distribution transformers engineered for reliable power distribution, efficiency and demanding commercial and industrial applications.
- [Medium Voltage Power Transformers](https://www.rexpowermagnetics.com/categories-product/medium-voltage-power-transformers/) - Discover VPI/VPE and cast coil medium voltage transformers engineered for reliable power distribution in demanding applications.
- [Specialty Products](https://www.rexpowermagnetics.com/categories-product/specialty-products/) - Need more than a standard transformer? Explore specialty magnetic products engineered by REX for unique electrical and environmental challenges.
- [Control & Automation](https://www.rexpowermagnetics.com/categories-product/control-automation/) - Power critical control and automation systems with reliable transformers built for demanding applications. Explore standard and custom solutions from REX.
- [Reactors & Filters](https://www.rexpowermagnetics.com/categories-product/reactors-filters/) - Protect equipment and improve power quality with REX reactors and filters engineered for demanding industrial electrical systems.
- [Low Voltage Distribution Transformers](https://www.rexpowermagnetics.com/categories-product/low-voltage-distribution-transformers/) - Explore low voltage distribution transformers engineered for reliable power distribution, efficiency and demanding commercial and industrial applications.
- [Medium Voltage Power Transformers](https://www.rexpowermagnetics.com/categories-product/medium-voltage-power-transformers/) - Discover VPI/VPE and cast coil medium voltage transformers engineered for reliable power distribution in demanding applications.
- [Specialty Products](https://www.rexpowermagnetics.com/categories-product/specialty-products/) - Need more than a standard transformer? Explore specialty magnetic products engineered by REX for unique electrical and environmental challenges.