Multi-Tap Power Flex
Integrated multi-tap primaries and secondaries allow flexible voltage matching to account for element aging, changing load impedance, and precise variable thermal profiles across multi-zone industrial ovens and furnaces.
High-Performance Heating & Furnace Transformers
At AFP Transformers Corp., we design and manufacture a comprehensive line of custom dry-type and cast-coil transformers engineered specifically to withstand the extreme duty cycles, harmonic stress, and continuous high thermal demands of industrial heating and furnace applications. Built upon the merged engineering legacies of Field Transformer, IsoReg, and International Transformers Incorporated (ITI), our USA-manufactured heating transformers empower global OEM equipment manufacturers and industrial facilities with reliable, energy-efficient power transformation.
Our custom capabilities cover a wide thermal and electrical spectrum—including multi-tap voltage configurations, saturable reactors, SCR (Silicon Controlled Rectifier) primary control magnetics, and Scott-T phase transformation units. Whether powering high-temperature heat-treating furnaces, vacuum induction melting, glass manufacturing, or semiconductor thermal processing equipment, AFP delivers tailored solutions rated from 100 VA up to 2,500 kVA across 600 V to 34.5 kV voltage classes.
Advanced Engineering Features for Heating Applications
SCR & Saturable Control
Engineered to handle severe phase-angle firing and high peak current waveforms associated with SCR-driven primaries and saturable reactor power supplies without core saturation or excessive temperature rise.
Scott-T Phase Conversion
Precision-balanced Scott-T transformer configurations engineered to convert 3-phase utility grid power into balanced 2-phase power (or vice versa), ideal for dual-element heating loads and specialized thermal systems.
High-Frequency Induction
Specialized high-frequency induction heating transformers operating up to 25 kHz. Features customized impedance-matching secondary outputs optimized for RF, microwave, and high-frequency induction heating power supplies.
Rugged Thermal Construction
Built with premium Class H (180°C) or Class N (200°C) high-temperature insulation systems, solid copper or aluminum foil windings, and vacuum pressure impregnation (VPI) for superior mechanical integrity and moisture resistance.
Custom Enclosures & Cooling
Available in NEMA 1 through NEMA 4X stainless steel enclosures, non-ventilated sealed housings, drip-proof rain shields, and custom forced-air or liquid-cooled configurations for harsh industrial environments.
Transformer Configurations & Assemblies
Multi-Tap Furnace Unit
High Current Secondary
NEMA 3R Enclosed Heavy Duty
Epoxycast® Coil Assembly
Engineering Specifications & Capabilities
| Transformer Types | Step-Down Transformers, Multi-Tap Transformers, Scott-T Phase Conversion Transformers, Saturable Reactors, Auto-Transformers, and High-Frequency Output Transformers. |
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| Control Features & Options | SCR Controlled Primaries, Saturable Core Reactor Designs, High-Frequency Voltage Conversion, Impedance Matching Outputs, and Integrated Water-Cooled Bus Bars. |
| Power Ratings | 100 VA to 2,500 kVA (Custom engineered capacities available upon request). |
| Voltage Classes | 600 V Class, 5 kV Class, 15 kV Class, up to 34.5 kV Medium Voltage Class. |
| Operating Frequency | 50 Hz, 60 Hz, 400 Hz, and High Frequency up to 25 kHz for induction heating. |
| Power Phase Types | Single Phase, Two Phase, Three Phase, and Multi-Phase configurations. |
| Construction Types | VPI Standard Dry Type, Cast Block, Epoxycast® Cast Coil, and Open Frame. |
| Winding Materials | High-Conductivity Copper, Aluminum Foil, Magnet Wire, and Heavy Copper Bus Bars. |
| Enclosure Options |
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| Insulation Thermal Rating | 150°C, 180°C (Class H), and 220°C (Class R) insulation systems; up to 150°C temperature rise. |
| Testing & Quality Inspection |
100% Production Tested & Stored Quality Data:
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| Production Volume & Supply Chain | Prototype development, low-volume specialty runs, high-volume OEM manufacturing, KanBan stocking programs, Min-Max inventory management, and Just-In-Time (JIT) global shipping. |
| Typical Lead Times | 3 to 6 Weeks standard; expedited emergency turnaround available in as little as 1 week. |
Compliance Standards & Industry Applications
| Target Applications | Industrial Electric Furnaces (Arc, Resistance, & Induction), Heat Treating Ovens, Semiconductor Crystal Growing & Wafer Fabrication, Glass & Ceramic Melting Kilns, RF & Microwave Heating Machinery, Vacuum Induction Melting (VIM), Chemical Thermal Reactors, and Metal Annealing Systems. |
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| North American Standards |
IEEE C57.12.01 (General Requirements for Dry-Type & Cast Transformers) IEEE C57.12.91 (Standard Test Code for Dry-Type Distribution & Power Transformers) UL 506 (Standard for Specialty Transformers) UL 508 (Standard for Industrial Control Equipment) UL 1561 (Dry-Type General Purpose & Power Transformers - 600V Class) UL 1562 (Dry-Type Medium Voltage Transformers up to 34.5 kV) NEMA ST 20 (Dry Type Transformers for General Applications) NEMA TR1 & NEMA ICS 2 (Motor Starting & Industrial Controller Equipment) |
| International & Marine Certifications |
IEC 60076 (Power Transformers & Reactors - Medium Voltage) IEC 61558 (Safety of Power Transformers & Power Supply Units) CE Certification compliant to applicable IEC directives ABS (American Bureau of Shipping) & DNV (Det Norske Veritas) Marine Standards |
Request Custom Heating & Furnace Transformer Engineering
Partner with AFP Transformers Corp. to optimize your thermal processing operations. Our engineering specialists are ready to review your exact electrical specifications, thermal profiles, and enclosure dimensions.
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