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.
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
Same Day Quotes
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.
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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.
Multi-Bay Lineups
Multi-Bay Lineups
Multi-bay lineups combine multiple switchgear sections into a single integrated assembly, providing a compact way to connect and control multiple incoming and outgoing circuits.
NEMA 3R Enclosures
NEMA 3R Enclosures
NEMA 3R enclosures provide the same protection as NEMA 1 enclosures with additional protection against rain, sleet, and snow.
Space Heater with Thermostat
Space Heater with Thermostat
Space heaters in metal-enclosed switchgear prevent condensation by maintaining a controlled internal temperature and reducing excess moisture buildup on electrical components.
Frequently Asked Questions
Single Phase vs Three Phase
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 .
Shipping
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.
Remanufactured
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.
New vs Remanufactured
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.
Returns & Exchanges
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 .
American Made
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.