

Power Transformers
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At AFP Transformers, we offer dry type power transformers in 600 V to 34.5 kV voltage classes. Power transformers may either be traditional dry type transformers manufactured using VPI processes or Epoxycast transformers which have coils directly cast into a tough epoxy material. Transformers are available as open core and coil configuration for integration into panels, or contained in enclosures. Enclosure options include pad-mount, unit substation designs, and all standard NEMA enclosures including stainless steel. An abundance of standard designs are available to fit many applications, but our engineers also have extensive experience in developing custom products for specialty applications. This versatility allows us to efficiently produce transformers at any production volume while maintaining competitive prices and providing fast turnaround.
Additional features can be incorporated in the transformer design as the application dictates. Optional features include readouts and indicators, forced air cooling to increase operating kVA percentages, and surge protectors. A variety of inventory management and stocking options are also available including Kanban systems and JIT shipping services.
For additional information about our power transformers, see the table below, or Contact Us directly.
Power Transformers Capabilities
- Transformer Type
- Power Transformers
- Power Type
-
- Single Phase
Two Phase - Three Phase
Multi-Phase
- Single Phase
- Voltage Class
-
- 600 V
5 kV - 15 kV
34.5 kV
- 600 V
- Construction
-
- Traditional Dry Type
- Cast Coil (Epoxycast®)
- Configurations
-
- Open Core & Coil
NEMA Enclosures - Pad-Mount
Unit Substation Designs
- Open Core & Coil
- Winding Material
-
- Copper
Aluminum - Magnet Wire
Foil
- Copper
- Enclosure Types & Options
-
- NEMA 1
NEMA 2
NEMA 3R
NEMA 4
NEMA 4X
NEMA 12
Drip Proof - Non-Ventilated
Totally Sealed
Stainless Steel
Indoor
Outdoor
Rain Shields
Custom
- NEMA 1
- Insulation Thermal Rating
- Up to 150°C Rise
- Additional Features & Options
-
- Temperature Readout Indicators
Feedback Circuits
Condensation Prevention Controls
Forced Air Cooling
Common Rectifier Duty Ratings - Lighting/Surge Arresstors
Primary Fusing
Secondary Fusing
Impedance Matched Designs
Loss-Evaluated Designs
- Temperature Readout Indicators
- Testing & Inspection
-
- 100% Product Testing
IEEE C57.12.91 Special, Standard, or Custom
Testing Parameters Stored- Voltage
- Current
- Watts
- Vars
- VA
- Power Factor
- Efficiency
- Applied Potential (HiPot) Testing to 100 kV AC RMS
BIL capability up to 300 kV
Partial Discharge Testing- Up to 100 kV applied potential
- In excess of 70 kV induced potential
- 100% Product Testing
- Stocking Programs
-
- Kanban
JIT Shipping - Min-Max
Custom
- Kanban
- Production Volume
-
- Prototype
Low Volume - High Volume
- Prototype
- Lead Time
-
- 3 to 6 Weeks Typical
- Expedited Turnaround in as little as 1 Week
Additional Information
- Industry Focus & Applications
-
- Switchgear Manufacturers
Motor Control Center Manufacturers
Utilities
Power Factor Correcting Equipment Manufacturers
Power Conditioning Equipment Manufacturers- PDU manufacturers
- UPS manufacturers
- Voltage Regulator Manufacturers
- Data Center CPUs
- Industrial Heating Equipment Manufacturers
- Furnaces
- Induction Heating Power Supplies
- RF and Microwave Heating Machines
Waste Water Treatment
OEM Machine Manufacturers- Machine Toolmakers
- Packaging Machines
- Semiconductor Machine Manufacturers
- Web Processing Machine Manufacturers
- Switchgear Manufacturers
- Industry Standards
- IEEE C57.12.01
General Requirements for Dry-Type Distribution & Power Transformers, Including Solid Cast
IEEE C57.12.91
Standard Test Code for Dry-Type Distribution & Power Transformers
UL 508
UL Standard for Industrial Control Equipment
UL 506
UL Standard for Specialty Transformers
UL 1561
Industry Standard for Dry Type General Purpose & Power Transformers, 600 Volt Class
UL 1562
Industry Standard for Dry Type General Purpose & Power Transformers, Medium Voltage, Up to 34.5 KV
NEMA ST 20
Standard for Dry Type Transformers for General Applications
NEMA TR1
Test Code for Transformers, Regulators & Reactors
NEMA ICS 2
Industrial Standard for Controllers, Contactors, Overload Relays & Related Equipment. (Motor Starting Autotransformers & Reactors)
International Standards
IEC 60076
Power Transformer & Reactors - Medium Voltage
IEC 61558
Power Transformers & Reactors - 600 Volt Class
CE Certification to IEC Standards
Marine Standards
ABS
American Bureau of Ships
DNV
Det Norske Veritas