Power Quality Products

At AFP Transformers, we offer transformers, reactors, and inductors designed to increase power quality. Our products are used in power conditioning equipment, passive and active filters, voltage regulators, and in multiple types of data center equipment such as CPU, PDU, and PDU equipment. We specialize in the design and manufacturing of custom transformers in 600 V to 34.5 kV voltage classes for a myriad of applications. Common transformer types used in power quality applications include K-rated, phase-shifting, pulse, and ferroresonant transformers. Specific outputs, core types, and configurations can be customized for specific applications at 50 Hz, 60 Hz, or 400 Hz operating frequencies.

We have very versatile manufacturing capabilities and can produce custom transformers in any production volume. All transformers are tested according to applicable industry and customer specifications. Our stocking and inventory management programs are very flexible and designed to serve the needs of the OEM and utility industries. These programs include Kanban management and JIT shipping services. 

For additional information about our range of power quality products, see the table below, or Contact Us directly.

Power Quality Products Capabilities

K-Rated Transformers
Phase-Shifting Transformers
Ferroresonant Transformers
Multi-Pulse Transformers
  • 12-Pulse
  • 18-Pulse
  • 24-Pulse
Inverter Input Transformers
Inverter Output Transformers
AC Filter Reactors
AC Inductors
DC Filter Chokes
Voltage Class
600 V
5 kV
15 kV
34.5 kV
50 Hz
60 Hz
400 Hz
Winding Material
Insulation System Rating
Up to 220°C
Thermal System Rating
All standard rises up to 150 °C
Equipment Applications
UPS Machines
Equipment For Data Centers
  • PDU
  • PDM
  • CPU
Voltage Regulators
Power Conditioners
Active Filter Systems
Passive Filter Systems
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
Customer Specified Testing as Requested
Stocking Programs
JIT Shipping
Production Volume
Low Volume
High Volume
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
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
Mining Machine Manufacturers
Waste Water Treatment
OEM Machine Manufacturers
  • Machine Toolmakers
  • Packaging Machines
  • Semiconductor Machine Manufacturers
  • Web Processing Machine 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
Standard for Dry Type Transformers for General Applications
Test Code for Transformers, Regulators & Reactors
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
American Bureau of Ships
Det Norske Veritas