Yes. Because they use a single winding, autotransformers are inherently more efficient than isolation transformers. Efficiency often exceeds 97%, resulting in lower operating costs and reduced heat generation. The reduced copper and core material requirements contribute to compact size and improved performance. Rex Power Magnetics designs its autotransformers to deliver stable voltage regulation and minimal losses, making them an environmentally and economically advantageous choice where isolation is not required.

Yes. Rex Power Magnetics designs and builds custom cast coil transformers to meet specific electrical, thermal, and mechanical requirements. Options include special voltage ratios, kVA ratings, impedance levels, enclosure types, cooling enhancements, and seismic or vibration-resistant configurations. Engineering support is available to ensure the optimal design for each project’s application and environmental conditions. Every custom transformer undergoes full electrical and mechanical testing to ensure compliance, safety, and dependable operation.

Yes. Rex Power Magnetics specializes in custom industrial control transformer solutions tailored to unique applications. Options include non-standard voltage ratios, frequency adaptations, fusing, terminal configurations, special nameplates, and mechanical mounting variations. Engineering support is available to assist OEMs and system designers with technical requirements such as space constraints, harmonic considerations, or environmental protection. Each custom unit undergoes the same rigorous testing and quality assurance as standard models, ensuring performance consistency and compliance with applicable standards. This flexibility allows Rex to meet specialized industrial and international market needs effectively.

Yes. Rex Power Magnetics offers fully customized encapsulated transformers to meet specific electrical, mechanical, and environmental requirements. Options include special voltage ratios, kVA ratings, frequency ratings, enclosure materials, and mounting configurations. Custom encapsulation compounds and temperature-rise classes can be specified for unique applications such as marine or corrosive atmospheres. Every custom unit is built and tested to the same standards as catalog models, ensuring consistent performance and reliability in specialized environments.

Yes. Rex Power Magnetics offers fully customized general purpose isolation transformers tailored to customer requirements. Options include non-standard voltage ratios, kVA ratings, special impedance levels, and custom enclosures. Our engineering team can design transformers with enhanced shielding, harmonic mitigation, or specific thermal performance targets. Each custom-built unit is produced and tested to the same rigorous standards, ensuring full compliance with applicable codes and reliable integration into specialized systems.

Yes. Rex Power Magnetics designs and manufactures custom hazardous location transformers to meet project-specific requirements. Options include special voltage ratings, enclosure materials, temperature-rise classes, and mounting configurations. Transformers can also be integrated into explosion-proof panels or combined with fusing and protection devices. Each custom design is fully tested and certified for its intended hazardous classification, ensuring compliance, reliability, and safe operation in demanding environments.

Yes. Rex Power Magnetics specializes in custom line and load reactors tailored to specific drive, voltage, or harmonic requirements. Options include custom inductance values, current ratings, terminal configurations, and enclosure types. Engineering teams perform system-level analysis to optimize performance for harmonic mitigation, voltage waveform improvement, and equipment protection. Each custom reactor is fully tested and certified to ensure compliance and long-term operational reliability.

Yes. Rex Power Magnetics designs and manufactures custom VPI/VPE transformers to meet specific electrical, mechanical, and environmental requirements. Options include special voltage ratios, kVA ratings, impedance levels, tap arrangements, enclosure materials, and winding configurations. Custom thermal or seismic designs can be provided for specialized installations. Every custom unit is fully tested to the same standards as catalog models, ensuring reliability and compliance with customer specifications.

General purpose isolation transformers are not optimized for the unique demands of motor drives, such as handling harmonic distortion and voltage spikes. Rex Power Magnetics’ Drive Isolation Transformers are specifically designed to withstand these conditions, making them a safer and more effective choice.

Dry-type transformers can generally be connected in reverse (back-fed), but there are some precautions to consider:

• Compensated Windings: Control transformers and distribution transformers below 3kVA are typically designed with an overvoltage on the secondary to compensate for voltage regulation at full load. Reverse feeding these transformers may lead to a lower than expected output voltage.
• Inrush current: The inrush current when energizing a transformer from the intended secondary terminals will be significantly higher than on the primary side as a multiple of the rated current. This high inrush current can cause nuisance tripping of the protective breaker and special considerations may need to be made.
• Voltage Taps: Given that there are typically no voltage adjustment taps on the secondary side, the transformer cannot be adjusted to account for higher or lower than nominal incoming voltages. In order to not damage the insulation or overexcite the core, the input voltage should not exceed the nominal rated secondary voltage. In the case that the incoming voltage is lower than the nominal rated secondary voltage, the taps on the primary winding can be used to boost the output voltage.
• Grounding: When the secondary (wye) of a delta-wye transformer is energized instead of the primary (delta), then the wye side of the transformer is not a separately derived service. As such, the neutral should not be connected to building ground nor should it be bonded to the transformer enclosure.

Always review applicable codes and standards and consult with the local authority having jurisdiction before reverse feeding transformers.

Yes. Rex Power Magnetics specializes in custom air core reactor designs for harmonic filtering, current limiting, or neutral grounding applications. Customization options include inductance value, current rating, physical dimensions, and mounting configuration. Engineering teams can also design reactors with specific tuning frequencies, voltage ratings, or dielectric clearances for utility, renewable energy, or industrial systems. Each custom-built reactor is fully tested for electrical, thermal, and mechanical compliance before delivery.

Yes. When required, air core reactors can be supplied with ventilated NEMA 3R or 4 enclosures for outdoor use. The polyester resin coating and fiberglass support structure provide strong resistance to moisture, UV exposure, and corrosion. For extreme environments, additional epoxy sealing or stainless steel hardware can be used. Proper installation spacing and ventilation ensure adequate cooling and prevent magnetic interference with nearby metal structures.

Yes. Cast coil transformers are designed to operate in the most demanding environments, including outdoor, marine, and corrosive locations. The solid epoxy insulation prevents moisture absorption, while enclosures rated NEMA 3R, 4, or 4X provide additional protection from dust, rain, and chemicals. Stainless steel or epoxy-coated housings are available for coastal or industrial applications. These transformers operate reliably in environments that would challenge conventional dry-type designs.

Yes. Rex Power Magnetics specializes in custom drive isolation transformer designs. Customers can specify voltage ratios, kVA ratings, temperature rise, impedance levels, and harmonic performance targets. Additional options include electrostatic shielding, thermal sensors, custom enclosures, and non-standard tap arrangements. Engineering teams work directly with OEMs, system integrators, and end users to ensure each unit is optimized for its specific drive and load conditions. Every custom transformer is tested to the same stringent standards as standard models, ensuring reliable and repeatable performance.

Yes. Encapsulated transformers are specifically designed for outdoor or damp environments. Their fully sealed coil construction prevents moisture ingress, while NEMA 3R, 4, or 4X enclosures protect against rain, dust, and corrosion. The resin encapsulation ensures continued electrical performance even in high humidity or temperature fluctuation conditions. These transformers are ideal for wall or pad-mounted installations exposed to weather, washdown, or chemical atmospheres, eliminating the need for additional protective housing.

Yes. When supplied with NEMA 3R or higher-rated enclosures, these transformers are suitable for outdoor or damp environments. The polyester resin coating protects the core and windings from moisture, dust, and corrosion, while the weatherproof housing shields electrical connections. For more severe environments, encapsulated construction or stainless-steel enclosures are available. Proper mounting, grounding, and ventilation practices must be followed to maintain performance and meet CSA and local electrical code requirements for outdoor installations.

Yes. Rex Power Magnetics offers complete customization for grounding transformers, including voltage class, configuration (zig-zag or wye-delta), kVA rating, fault current rating, and enclosure type. Optional features include neutral grounding resistors, temperature sensors, special insulation classes, and seismic or vibration-resistant mounting designs. Each custom transformer is fully engineered, built, and tested to the same rigorous standards as standard models to ensure precise performance and long-term reliability.

Yes. Outdoor-rated grounding transformers are supplied with NEMA 3R or 4 enclosures and built to withstand environmental exposure. The polyester resin coating protects coils against humidity and contamination, while durable enclosures guard against rain, dust, and corrosion. Optional stainless steel or epoxy-coated housings are available for coastal, mining, or chemical applications. Proper grounding and ventilation ensure safe and reliable operation in all conditions.

Yes. Rex Power Magnetics designs custom HMTs to meet specific harmonic profiles, voltage levels, and mechanical requirements. Customization options include unique phase-shift angles, impedance values, kVA ratings, and enclosure types. Engineering teams can also incorporate electrostatic shielding, multiple secondary outputs, or other design features to achieve targeted harmonic cancellation levels. Each transformer is individually tested to ensure compliance with harmonic mitigation performance standards and long-term operational reliability.

Yes. These transformers are designed for both indoor and outdoor use in classified environments. Outdoor-rated models are supplied with NEMA 3R, 4, or 4X enclosures that resist moisture, corrosion, and UV exposure. The polyester resin–dipped coils and sealed enclosures prevent ingress of contaminants and condensation. When properly installed according to CSA and NEC guidelines, they provide safe, long-term operation in even the harshest outdoor or offshore environments.