Single-Phase Padmount

Single-phase padmount transformers deliver underground power to homes and businesses. Their tamper-proof, low-profile design makes them ideal for public areas. Maddox supplies these units to commercial and industrial customers.

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1-PH Padmount Specifications

Voltage: 5 – 250 kVA

Maddox tamper-proof, liquid-filled, single-phase pad-mounted (or padmount for short) transformers are designed, built, and tested in accordance with the highest industry standards. They feature a clamshell cabinet design allowing easy access in a compact footprint.

Standard Features

Up to 19.9 kV (150 kV BIL)
Type II non-PCB mineral oil (ONAN)
Aluminum windings
Pad-lockable door handle
DOE 2016 efficiency
Reinforced carbon steel tank
Lifting lugs
Pressure relief valve
Nitrogen blanket
65 degree C rise
Bayonet fuse with drip shield
Dead front well & insert HV bushings
Paddle-spade or lug-connector type LV bushings

Optional Upgrades

27 kV designs
Dry-contact kit (2 normally open, 2 normally closed)
Customer metering
Multi-bay lineups
Surge arresters
Convenience light
Space heater switch
Duplex receptacle
Run back bus

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Price and lead time today

3 Year Warranty

Backed by US-based support

USA Options

Made-in-America available

Hit Your Lead Time with Stock and Custom Options

Maddox keeps metal-enclosed switchgear in stock for fast deliveries and builds custom ones with some of the best lead times in the industry.

Stock

Hit project deadlines with common kVA sizes and voltages, in stock and ready to ship.

Custom

Build exactly what you need with extensive switchgear customizations available.

See How We Earned +800 Five Star Reviews

Maddox metal-enclosed switchgear provide reliable power to critical projects across the United States.

Competitive pricing, always the most inventory, and exceptional after sales support. They are my "go to" option for transformers

David D.

This is my 5th order from Maddox. Always knowledgeable and helpful. Every transformer I have purchased has worked perfectly.

Jason W.

They have stock when others don't and are quick to ship and fill their orders. VERY THANKFUL we found them.

Mike A.

The transformer I ordered was delivered onsite at our project in two business days. Great service!

Jerome T.

Great company easy to deal with. Every transformer I buy will be from Maddox.

Austin M.

First time purchasing from Maddox. Was very easy and we are pleased with the results of our purchase.

Chris O.

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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.

Meet Any Spec with Extensive Customizations

Meet your exact spec with customized transformers designed, built, and tested in accordance with the highest industry standards including NEMA, ANSI, DOE, and IEEE as applicable.

Stainless
Steel Tank

Stainless steel transformer tanks provide enhanced corrosion resistance and durability in harsh environments, helping extend equipment life.

Pressure
Relief Valve

Pressure relief devices protect transformers from internal pressure buildup by venting excess pressure during fault or overheating conditions to prevent tank rupture or equipment failure.

Bayonet Fuse
with Drip Shield

Bayonet fuses with drip shields provide transformer overcurrent protection while adding a protective barrier that helps prevent moisture or fluid from entering the fuse compartment during maintenance or fuse replacement.

Frequently Asked Questions

Does Maddox sell both single phase and three phase padmount transformers?

Yes, Maddox sells single and three phase padmount transformers. Learn more about power distribution systems here.

How is shipping arranged for Maddox’s single phase padmount transformers?

Maddox ships single phase padmount transformers anywhere in North America, handling all logistics at no additional charge. Request a quote here to get specific pricing and lead times.

Are Maddox remanufactured single phase padmount transformers reliable?

Yes, Maddox remanufactured single phase padmount transformers are tested in accordance with NEMA, ANSI, DOE, and IEEE standards as applicable. Learn about remanufactured transformers here.

Does Maddox sell new and used single phase padmount transformers?

Yes, Maddox sells both new and remanufactured single phase padmount transformers, so you can meet the budget and deadline of any project.

Can I return or exchange a Maddox single phase padmount transformer?

Yes, Maddox single phase padmount transformers may be eligible for return or exchange within six months of shipment date. Terms and conditions apply. Learn about the Maddox return and exchange policy here.

Are Maddox single phase 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 substations to meet “Build America, Buy America” requirements. Ask for BABA in your quote and learn more about BABA here.