Low- & Medium-Voltage
Up to 15 MVA, 35 kV
Dry-Type Transformers
Hundreds of dry-type transformers in
stock and ready to ship.
Excellence Starts Here
- Immediate Availability
- Fully Customizable
- IEEE/ANSI C57.1
- Small- & Large-Scale Orders
- Free Shipping*Contiguous 48 United States
Powered By Choice
You should have full control over your preferred price range, lead time, and transformer configuration. That’s why we provide a quote for every equipment possibility available to you.
IN STOCK
Immediate Solutions
We have 500+ customizable dry-type transformers—up to 2500 kVA, 600 V—in stock and ready to ship.
Shop Low-Voltage Dry-Types
MADE-TO-ORDER
Set Your
Specifications
Receive the exact dry-type transformer you need—up to 15 MVA, 35 kV—in 16 weeks delivered (or 20 weeks, standard lead time).
Unmatched In Price, Speed & Quality
We’re committed to providing the highest-quality, most cost-effective transformers that the industry has to offer, with the fastest lead times on the market.
CORE Dry-Types
The Competition
PRICE
LEAD TIME
QUALITY
Medium-Voltage Dry-Type
 |  | |
|---|---|---|
Features | Low-Voltage Dry-Type | Medium-Voltage Dry-Type |
 Size & Voltage | Up to 2500 kVA, 600 V | Up to 15 MVA, 35 kV |
 BIL Rating | Up to 10 kV | Up to 200 kV |
 Cooling Classes | AA (Self-Cooled) | AA (Self-Cooled) FA (Forced-Air Cooled) FFA (Future Forced-Air Cooled) |
 Winding Configurations | Single Phase Δ (Delta) Y (Wye) GrdY (Grounded Wye) Zig Zag Auto | Single Phase Δ (Delta) Y (Wye) GrdY (Grounded Wye) Zig Zag Auto |
 Core Materials | Grain Oriented & Laminated Silicon Steel Amorphous Steel | Grain Oriented & Laminated Silicon Steel Amorphous Steel |
 Insulation Method | VPI (Vacuum Pressure Impregnated) | VPI (Vacuum Pressure Impregnated) Cast Coil (Epoxy Resin) |
 Insulation Temperature | 220°C | 220°C |
 Coil Material | Aluminum Copper | Aluminum Copper |
 Temperature Rise | 80°C–150°C | 80°C–150°C |
 Enclosure Type | General Purpose | General Purpose Unit Substation |
 Enclosure Ratings | NEMA 1, 3R | NEMA 1, 3R |
 K-Factor | 1, 4, 9, 13, 20, 30 | 1, 4, 9, 13, 20, 30 |
 Common Options | 3R Rain Hood | IR Viewing Window Lightning / Surge Arresters Qualitrol Transformer Monitor RC Snubbers |
 Build & Test Standards | IEEE/ANSI C57.12 | IEEE/ANSI C57.12 |
 Certifications | UL, cUL, DOE2016 | UL, cUL, DOE2016 |
| Shop Online |
Shipping & Availability
New (In Stock) | New (Custom) | ProCORE | Remanufactured | Rental |
|---|---|---|---|---|
Stock StatusIn Stock | Stock StatusMade-To-Order (MTO) | Stock StatusIn Stock | Stock StatusRemanufactured-To-Order | Stock StatusIn Stock |
Lead TimeReady to Ship | Lead Time20 Weeks Delivered (16 Weeks Expedited) | Lead TimeReady to Ship | Lead Time4–6 Weeks (Rush Available) | Lead TimeReady to Ship |
Standard Warranty2–3 Years (Extended up to 5 Years) | Standard Warranty2–3 Years (Extended up to 5 Years) | Standard Warranty3 Years (Extended up to 5 Years) | Standard Warranty3 Years (Extended up to 5 Years) | – |
Build The Exact Dry-Type You Need
Receive customized equipment in 20 weeks, or 16 weeks expedited, with our made-to-order (MTO) dry-type transformers.
Questions?
We Have Answers.
What does the warranty cover? 
If you didn’t get what you expected, we’ll make it right. Now, if you decided to wire the transformer backwards or drop it off the side of a truck, that would not be covered in the warranty—but we would still see what we could do to help. For all the fine-print that will keep your attorney busy, see the Warranty Details on our Terms & Conditions page.
Can I purchase an extended warranty?
Yes, you can purchase an extended warranty for 2% per year, with a maximum warranty of up to 5 years total.
Can CORE repair my existing transformer?
Absolutely. Check out our for a full process breakdown. We can complete most jobs within just a few days or weeks, depending on the complexity of the repair.
Can CORE modify my existing transformer?
It would be our pleasure. We frequently modify our stock units and customize our customers’ units to suit specific projects, even on tight deadlines. Check out our for more details.
Does CORE sell spare parts?
Sometimes, the easiest way for us to help you means selling a bushing, gasket, part, or piece to keep your project moving. And while we’re not technically in the business of selling parts, we’ll always see what we can do to help our existing customers.
Does CORE ship internationally?
We do, and we’d be happy to help coordinate an international shipment. Or, we can facilitate a delivery to your local freight forwarder.
Are emergency and holiday shipments available?
Our normal office hours follow most holidays, but our team is available 24/7/365 for customer emergencies. Please note that orders that have been taken or shipped after hours, on weekends, or on holidays, though, will incur additional emergency fees.
Can I have the transformer painted a different color?
As long as it’s not USC Gamecock Garnet Red (Go Tigers!), we should be able to accommodate. You can talk to one of our sales associates for more info.
Does the free shipping include a dedicated truck?
Our free shipping does not include a dedicated truck. Most transformers are quoted with free delivery anywhere in the lower 48 states, with a few exceptions for extra-large specialty units. These are not dedicated loads, but frequently ship within 24–72 hours of the order receipt.
Can I arrange my own pick-up or drop-off?
Absolutely. Most of our orders include free freight anywhere in the lower 48 states, however, you are welcome to arrange your own freight and our team will happily load your truck at no extra cost.
Can specific labels be applied to the unit?
Not a problem. Just be sure to coordinate with your sales associate when placing your order.
Are CORE transformers® autobots or decepticons?
If they ever start talking or walking, please submit a warranty claim. For now, they’re 100% focused on uptime and reliability.
What kind of equipment is needed to offload the transformer?
Most dry-type transformers, approximately 500 kVA and below, will be loaded and secured to a pallet and shipped LTL for easy unloading. Transformers larger than 500 kVA are typically loaded directly onto a flatbed truck and may require removing bolts from the front cover in order to access lifting points within the enclosure. If you have any concerns, our team can verify shipment configuration before your units arrive.
Industries We Support
Commercial
Reliable energy distribution for retail, offices, and commercial campuses.
Industrial
Engineered to meet the demands of heavy-duty industrial operations.
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Renewables
Seamless integration for solar, wind, and other renewable energy systems.
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Data Centers & Critical Power
High-performance power solutions for data, tech, and mission-critical loads.
Learn MoreCustomers We Serve
Electrical Contractors
From installations to repairs, we’ll support you with the highest-quality transformer solutions.
Electrical Distributors
Partnering with you in all-things-transformers, so that your clients never have to wait.
NETA / Field Service
When you run into trouble in the field, we’re the number you want to have on speed dial.
Operations & Maintenance
We’re available to assist your team 24/7/365 to ensure your division runs smoothly.