Transformers
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With decades of industry experience and 1,000+ transformers under our roof, we deliver the transformer solutions you need before the competition can even get you a quote.
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Discover our most common models of in-stock transformers, ready to ship same-day or made-to-order in record time.
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The Industry’s Leading Inventory
“Downtime” isn’t in our vocabulary. We pride ourselves on providing you with the fastest delivery timelines so that you can get back to powering your projects.
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With our most expedited option for made-to-order (MTO) transformers.
Need something faster? In-stock transformers ship same day.
Need something faster? In-stock transformers ship same day.
Explore The Lineup
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Low-Voltage Dry-Type | Medium-Voltage Dry-Type | Padmount | Substation |
30–2,500 kVA Up to 35 kV | 112.5–15 MVA Up to 35 kV | 112.5–15 MVA Up to 35 kV | 500 kVA–100 MVA Up to 230 kV |
Single- or Three-Phase | Three-Phase | Single- or Three-Phase | Three-Phase |
 Winding Configurations Single-Phase ∆ (Delta) Y (Wye) GrdY (Grounded Wye) | Winding Configurations ∆ (Delta) Y (Wye) GrdY (Grounded Wye) | Winding Configurations Single-Phase ∆ (Delta) Y (Wye) GrdY (Grounded Wye) | Winding Configurations ∆ (Delta) Y (Wye) GrdY (Grounded Wye) |
 Core Material Laminated Steel | Core Material Laminated Steel | Core Material Laminated Steel | Core Material Laminated Steel |
 Coil Material Aluminum Copper | Coil Material Aluminum Copper | Coil Material Aluminum Copper | Coil Material Aluminum Copper |
 Terminations ANSI 1 (Front) | Terminations Top / Bottom ANSI 1-4 | Terminations Live Front Dead Front, Loop Feed Dead Front, Radial Feed | Terminations Throat Flange Top (Exposed) ATC (Air Terminal Chamber) ANSI 1-4 |
 HV/LV Connections LV Bus | HV/LV Connections HV Bus or Lugs LV Bus w/ NEMA Hole Spacing | HV/LV Connections 200A Wells w/ Inserts 200A One-Piece Purple Cuff 600A Dead Break 900A Dead Break Spades w/ NEMA Spacing | HV/LV Connections 200A Wells w/ Inserts 200A One-Piece Purple Cuff 600A Dead Break 900A Dead Break Spades w/ NEMA Spacing |
 BIL Rating 10 kV–30 kV | BIL Rating 10 kV–200 kV | BIL Rating 30 kV–200 kV | BIL Rating 30 kV–200 kV |
 K-Factor Rating K-1 through K-30 | K-Factor Rating K-1 through K-30 | K-Factor Rating K-1 through K-30 | K-Factor Rating K-1 through K-30 |
 Build & Test Standards ANSI / IEEE C57.12 | Build & Test Standards ANSI / IEEE C57.12 | Build & Test Standards ANSI / IEEE C57.12 | Build & Test Standards ANSI / IEEE C57.12 |
 Certifications UL, cUL, DOE2016, FM | Certifications UL, cUL, DOE2016, FM | Certifications UL, DOE2016, FM | Certifications UL, DOE2016, FM |
 Features & Accessories Taps NEMA 3R Rain Hood Wall Mounting Brackets Multi-Voltage Ratings | Features & Accessories Taps Fans & Controller Vacuum Pressure Impregnated (VPI) Cast-Coil Epoxy Resin Infrared (IR) Window RC Snubbers Monitoring NEMA 3R Exposure Infrared (IR) Viewing Window | Features & Accessories Taps Live / Dead Front Radial / Loop Feed Mineral Oil / FR3 / Silicone External Drain & Sample Pressure Relief Valve (PRV) Pressure Release Device (PRD) Motorized LBOR Thermometer Liquid Level Gauge Gauges w/ Contacts Switch w/ Contacts Winding Temperature Gauge Kirk Key Provisions Through-Tank Window Close-Couple HV/LV Infrared (IR) Viewing Window Sudden Pressure / Seal In Relay External Control Box | Features & Accessories Taps Throats Flanges Air Terminal Chambers (ATC) Pressure Release Device (PRD) Fans w/ Controller Thermometer Liquid Level Gauge Sudden Pressure / Seal In Relay Close-Couple HV/LV Over-Bushing CTs Gauges w/ Contacts Winding Temperature Gauge |
 Impedance ANSI C57 Standard Custom | Impedance ANSI C57 Standard Custom | Impedance ANSI C57 Standard Custom | Impedance ANSI C57 Standard Custom |
— |  Temperature Rise 80°C–150°C | Temperature Rise 55°C 65°C 75°C | Temperature Rise 55°C 65°C 75°C |
 Insulating Medium Ventilated Air | Insulating Medium Ventilated Air Forced Air | Insulating Medium Mineral Oil FR3 (Natural Ester Fluid) | Insulating Medium Mineral Oil FR3 (Natural Ester Fluid) |
 Cooling Classes AA | Cooling Classes AA, FA, FFA | Cooling Classes ONAN, ONAF, KNAN, KNAF | Cooling Classes ONAN, ONAF, KNAN, KNAF, Future Fans |
— | — |  Overcurrent Protection Bayonet Fuses Current Limiting Fuses Weak Links Isolation Links | Overcurrent Protection Bayonet Fuses Current Limiting Fuses Weak Links Isolation Links |
SHIPPING & AVAILABILITY | |||
New Stock Same-Day Shipping | New Stock Same-Day Shipping | New Stock Same-Day Shipping | New Stock Same-Day Shipping |
ProCORE Same-Day Shipping | ProCORE Same-Day Shipping | ProCORE Same-Day Shipping | ProCORE Same-Day Shipping |
Refurbished Same-Day Shipping | Refurbished 4–6 Weeks (Rush Available) | Refurbished 4–6 Weeks (Rush Available) | Refurbished 4–6 Weeks (Rush Available) |
Made-To-Order (Delivered) 18 Weeks 12 Weeks (Expedited) | Made-To-Order (Delivered) 18 Weeks 12 Weeks (Expedited) | Made-To-Order (Delivered) 24 Weeks 16 Weeks (Expedited) | Made-To-Order (Delivered) 24 Weeks 16 Weeks (Expedited) |
Rental Same-Day Shipping | Rental Same-Day Shipping | Rental Same-Day Shipping | Rental Same-Day Shipping |
Expedited Shipping Available. Contact Us 24/7Setting A New Standard
Discover The CORE Difference
Consider us your partner in power, providing the transformer solutions you need—and nothing you don’t.
Lightning-Fast Lead Times
10 Weeks Made-To-Order
Low Voltage Dry-Types
Low Voltage Dry-Types
14 Weeks Made-To-Order
Med Voltage Dry-Types
Med Voltage Dry-Types
40 Weeks Made-To-Order
Substation
Substation
24 Weeks Made-To-Order
Padmount
Padmount
Get A Quote In Weeks Minutes
44+
Years of Perfecting Transformer Solutions
"We're built on speed, stock, and service."
Randall Maddox