Hero Transformer

Up to 30 MVA & 35 kV

Substation Transformers

Power any project with our in-stock units
or made-to-order equipment.

Excellence Starts Here

  • Same-Day Availability
  • Fully Customizable
  • IEEE/ANSI C57.1
  • Small- & Large-Scale Orders
  • Free Shipping
    *Contiguous 48 United States

The Choice Is Yours

Discover the price range, lead time, and transformer configuration that best suits your team’s needs. We'll provide a quote for each solution to help get you started.

The CORE Difference

We’re consistently leading the charge with the most cost-effective, high-quality transformer solutions, built and delivered in record time.
CORE Substation
The Competition
PRICE
LEAD TIME
QUALITY
substation
Features
Three-Phase Substation
lightningSize & Voltage
500 kVA–30 MVA
Up to 115 kV
bill-ratingBIL Rating
Up to 550 kV
cooling-classCooling Classes
ONAN/ONAF Mineral Oil
KNAN/KNAF (FR3 Natural Ester)
Future Fans
winding-configWinding Configurations
Δ (Delta)
Y (Wye)
GrdY (Grounded Wye)
Multi-Voltage
core-materialsCore Materials
Laminated Silicon Steel
Amorphous Steel
coil-materialCoil Material
Aluminum
Copper
temperature-classesTemperature Classes
55°C
65°C
75°C
featuresFeatures
Infra-red (IR) Window
External Drain & Sample
Pressure Relief Valve (PRV)
Pressure Release Device (PRD)
Sudden Pressure Sensor Motorized LBOR
accessoriesAccessories
Liquid Temperature Gauge
Liquid Level Gauge
Gauges w/ Contact
LBOR w/ Contacts
Winding Temperature Gauge
Kirk Key Provision
Through-Tank Window
build-test-standardsBuild & Test Standards
IEEE/ANSI C57.12
certificationsCertifications
UL, cUL, DOE2016

Shipping & Availability

New (In Stock)
New (Custom)
ProCORE
Remanufactured
Rental

Stock Status

In Stock

Stock Status

Made-To-Order
(MTO)

Stock Status

In Stock

Stock Status

Remanufactured-To-Order

Stock Status

In Stock

Lead Time

Same-Day Shipping

Lead Time

20 Weeks
(Rush Available)

Lead Time

Same-Day Shipping

Lead Time

4 Weeks
(Rush Available)

Lead Time

Same-Day Shipping

Price

$$$$

Price

$$$

Price

$$$

Price

$$

Price

$

Standard Warranty

2 Years
(Extended up to 5 Years)

Standard Warranty

2 Years
(Extended up to 5 Years)

Standard Warranty

3 Years
(Extended up to 5 Years)

Standard Warranty

3 Years
(Extended up to 5 Years)

RepairsRepairs

Customizable Substation Transformers

We’ll customize equipment to match your exact specifications. Get made-to-order (MTO) substation transformers in just 24 weeks.

Questions?
We Have Answers.

What does the warranty cover? plus
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? plus
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? plus
Absolutely. Check out our Transformer Repair page 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? plus
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 Transformer Customization page for more details.
Does CORE sell spare parts? plus
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? plus
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? plus
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? plus
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? plus
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? plus
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? plus
Not a problem. Just be sure to coordinate with your sales associate when placing your order.
Are CORE transformers autobots or decepticons? plus
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? plus
Most substation transformers are loaded onto 6x6 or 8x8 timber and are secured onto a flatbed truck. We typically recommend using slings on a forklift to lift the transformer from the lifting eyes, although you could potentially lift it from below, instead. Contact our team with any questions and we’ll confirm the specific arrangement you’ll need.
Can CORE build to custom dimensions? plus
es, we can! We’ve even been known to fly across the country to get measurements on-site, ensuring the perfect form fit and function, especially for equipment that needs to close-couple HV or LV gear on either side. Your sales associate can answer any questions you have about custom work.
Does CORE offer commissioning services for large units? plus
We leave the commissioning and field-service to our valuable partners. Give us a call for a recommended company in your area.
Can I buy extra oil from CORE? plus
Our goal is to be easy to do business with, and sometimes that means shipping a few totes of mineral, silicone, or FR3 oil. Give your sales associate a call to discuss your options.

Industries We Support