Fast Lead Times

Padmount Transformers

The safety and security of tamper-proof padmount transformers make them ideal for public installations with underground cabling.

CAPABILITIES MADDOX ADVANTAGE

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Capabilities

Maddox stocks and supplies padmount transformers for projects of any size, customized however you need them. From solar duty and data center designs to standard commercial and industrial units we have the padmounts to get your project powered on.

Maddox tamper-proof, compartmentalized, liquid-filled, pad-mounted (or padmount) transformers are all-in-one units designed, built, and tested in accordance with the highest industry standards including NEMA, ANSI C.57, DOE, and IEEE as applicable. They can be customized with over-current protection, and sectionalized switching to give you maximum control over your distribution system.

Product Scope

Base Rating: 30 – 10,000 kVA
High Voltage: 5kV – 35kV
Low Voltage: 208- 15kV

Common Padmount Sizes:

300 kVA
Padmount Transformer

500 kVA
Padmount Transformer

750 kVA
Padmount Transformer

1000 kVA
Padmount Transformer

1500 kVA
Padmount Transformer

2000 kVA
Padmount Transformer

2500 kVA
Padmount Transformer

3000 kVA
Padmount Transformer

Technical Specs

Standard specs

Type II non-PCB mineral oil (ONAN)
High-grade silicon-steel core
Aluminum windings
Pad-lockable door handle
No-load tap changer
Impedance 5.75 % (±7.5%)
Reinforced carbon steel tank
Lifting lugs
Externally clamped high- and low-voltage bushings
Pressure relief valve
Pressure vacuum gauge
Liquid temp gauge
Liquid level gauge
Drain and sample valve
Schrader valve
Ground pads/lugs
Nitrogen blanket
65 degree C rise

Optional Features

Environmentally friendly, high fire-point FR3 oil (KNAN)
Copper windings
Key interlock provisions
Stainless steel tank
Gauges with contacts
Externally accessible drain and sample valve
External gauge package
Lid-mounted pressure relief device
Sudden pressure relay
Lightning arresters
Viewing windows in cabinet
55/65 degree C rise
Step-up solar and wind duty design
Electrostatic shielding
K-rated design
Vacuum Interrupters

Maddox Advantage

Padmounts. In Stock. Ready To Ship.

Maddox stocks thousands of new and remanufactured padmount transformers in yards across the United States. If we don’t have what you need in stock, we can have it built for you with the shortest lead-times in the industry.

Speed

Maddox has the fastest lead times for padmount transformers in the industry. We also pride ourselves on fast clear communication for our customers.

Capacity

With over 4,000 new padmount manufacturing slots each year and thousands in stock across the U.S., we’re ready to power your project—no matter the size.

Quality

Based in South Carolina, with locations across the United States, we stand behind our padmounts with an industry leading 3-year warranty.

Power your next project on with a Maddox padmount. Fill out the form below to get a padmount quote.

Projects Powered by Maddox Padmounts

Don’t just listen to us. Take it from our customers and their 800+ 5 Star Reviews.

It’s rare to find a team that combines professionalism with such a human touch. Their responsiveness made all the difference; I never felt like I was left waiting or out of the loop. It felt more like a partnership than just a service

Shaun D

Greg went OVER AND BEYOND to get us what we needed on a holiday weekend. He helped us find the correct transformer and coordinate a pickup within an impossible timeframe. Will definitely use Maddox for any future transformer needs.

Brandon R

I have never had a bad experience when working with Maddox as their quotes come quickly and if changes are needed, they turn them around just as fast. It truly feels like you are their main customer at all times.

Austin S

I will definitely use Maddox again. When I called, A real person (Gregory) answered the phone, and within a half hour or so, I had three quotes in my inbox to review.

Timothy G

This company is very good on customer service, I sent an email inquiry about a specific transformer, I received a reply with-in few minutes. I called back to get some more information, someone answer the call, No Hold! very professional response.

Ouri L

Maddox has exceptional lead times! We have installed numerous Maddox units over the past year. Great customer service and super fast turn around on equipment, what more can you ask for!

Michael M

I purchased a Transformer from Maddox. They explained everything to me about what I needed. It was in stock. They arranged the shipping and was delivered to my customer right away. The service was prompt and professional.

Scott Hotsinpiller

Get a Same Day Padmount Quote

Fill out the form and we will get back to you as soon as possible. Our average response time during business hours is 30 minutes.

Frequently Asked Questions

Lead Time

What is the average lead time for a Maddox padmount transformer?

Maddox offers industry-best lead times. We stock units for same-day deliveries, remanufacture in 4–6 weeks, and can provide built-to-order new padmounts in under 20 weeks. Request a quote here for spec-specific lead times.

Warranty

What is Maddox’s standard warranty for padmount transformers?

Maddox offers the industry’s best warranty for padmount transformers, covering new and remanufactured units for 3 years (with a 5 year option available).

American Made

Are Maddox padmount transformers BABA compliant?

Many Maddox products are made in the USA, but not all. Our goal is to provide the majority of our products domestically, while leveraging global supply as needed. We specify “American Made” on our quotes when applicable. Maddox can also provide padmounts to meet “Build America, Buy America” requirements. Ask for BABA in your quote and learn more about BABA here.