Transformers

Exceptional Quality.
Lightning-Fast Delivery.

When it comes to speed and reliability— there is no competition.

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.

Same-Day Response

We’ve Got What You Need

Discover our most common models of in-stock, ready-to-ship transformers, or speak with our team about made-to-order power solutions.

Dry-Type

Up to 15 MVA, 35 kV

Padmount

Up to 11 MVA, 45 kV

Substation

Up to 100 MVA, 230 kV

Above And Beyond The Rest

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.

CORE Transformers®

12 Weeks

The Competition

35 Weeks
On Average

With our most expedited option for made-to-order (MTO) transformers.
Need something faster? In-stock transformers are ready to ship, same-day.

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Low-Voltage Dry-Type	Medium-Voltage Dry-Type	Padmount	Substation
Up to 2500 kVA, 600 V	Up to 15 MVA, 35 kV	Up to 11 MVA, 45 kV	Up to 100 MVA, 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

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SHIPPING & AVAILABILITY
New Stock Ready to Ship	New Stock Ready to Ship	New Stock Ready to Ship	New Stock Ready to Ship
ProCORE Ready to Ship	ProCORE Ready to Ship	ProCORE Ready to Ship	ProCORE Ready to Ship
Refurbished Ready to Ship	Refurbished 4–6 Weeks (Rush Available)	Refurbished 4–6 Weeks (Rush Available)	Refurbished 4–6 Weeks (Rush Available)
Made-To-Order (Delivered) 10 Weeks	Made-To-Order (Delivered) 14 Weeks 12 Weeks (Expedited)	Made-To-Order (Delivered) 40 Weeks 16 Weeks (Expedited)	Made-To-Order (Delivered) 24 Weeks 16 Weeks (Expedited)
Rental Ready to Ship	Rental Ready to Ship	Rental Ready to Ship	Rental Ready to Ship