Quoting across every supply route, delivered and factory

Pad mounted transformers, without the year long wait

Three phase liquid-filled units from 45 to 2500 kVA, dead front, loop feed, built to ANSI/IEEE C57.12.34. We quote every route we can buy on, delivered and factory, and we tell you plainly which one your date actually needs.

Browse by rating Find a manufacturer

172

UL listed makers tracked

of them TAA eligible

4 to 22

weeks, quoted factory lead times

45 to 2500

kVA quoted

equipment we source

Transformers, and everything around them

Switchgear, solar and battery transformers, dry type, generators, cable and used equipment, sourced from US and overseas manufacturers and quoted delivered.

Switchgear and Switchboards

Low voltage switchboards and switchgear and medium voltage metal clad and metal enclosed switchgear, sourced from US and overseas manufacturers and quoted delivered to site.

Solar and Battery Step Up Transformers

Pad mounted step up transformers for solar farms and battery energy storage, inverter and MV skid transformers, sourced from US and overseas manufacturers and quoted delivered.

Dry Type Transformers

Low voltage and medium voltage dry type and cast resin transformers for indoor use, from small control units to large unit substation transformers, quoted delivered.

Used and Reconditioned Equipment

Used, surplus and reconditioned pad mounted transformers, switchgear and generators, tested and quoted delivered, plus buying decommissioned units.

Generators

Diesel and natural gas generator sets from 100 kW to 3 MW, transfer switches and paralleling gear, new and used, quoted delivered.

Medium Voltage Cable

Medium voltage power cable from 5 kV to 35 kV, URD primary cable, elbows and terminations, and low voltage building wire in volume, quoted delivered.

Substation and Power Transformers

Substation transformers, unit substations and power transformers from about 1 MVA upward, sourced from US and overseas manufacturers and quoted delivered.

Data Center Power

Transformers, switchgear, busway, UPS and power distribution units for data centers and mission critical facilities, quoted delivered.

01, ratings we move most

Start with the rating

Dimensions and weights are typical and vary between manufacturers. Secondary current is at 480Y/277.

02, the supply base

A UL listing says a company may build these. It does not say one will sell you one.

We catalogued every company holding a UL listing to build these for the US market. Nobody else publishes this, and it is free to cite.

All the figures and how they were gathered

73 of 172

73 of the 172 companies UL listed to build liquid-filled pad-mounted transformers for the US market are TAA eligible, about 42 percent. That counts US made end products and designated country end products under FAR 25.003.

Padmount Supply LLC, 24 September 2026. Free to cite with a link.

03, manufacturers

Who stocks, who builds

The distinction that decides your date is not who is biggest. It is whether a company holds inventory or sells you a production slot.

Stocking distributors 4

Hold inventory. Ship in days or weeks.

Maddox, Sunbelt Solomon, T&R Electric

US builders 15

Build to order. A purchase order buys a slot.

Virginia Transformer, ERMCO, Central Moloney

Global OEMs 8

Rarely quote a single unit.

ABB, Hitachi Energy, Eaton

Overseas builders 2

Build to order outside the US.

Prolec GE, Hammond Power Solutions

All 172 UL listed manufacturers

04, specifications

Written for the person specifying the job

8 guides to the details that decide whether two quotes are actually comparable, and whether the unit passes inspection once it is on the pad.

01Pad Mounted Transformer Dimensions and Weights 02Dead Front and Live Front Pad Mounted Transformers 03Loop Feed and Radial Feed Pad Mounted Transformers 04Three Phase Transformer Wiring, Delta and Wye 05Reading a Pad Mounted Transformer Nameplate 06Pad Mounted Transformer Clearance Requirements 07Transformer Taps, Full Capacity and Why They Matter 08Oil Filled and Dry Type Transformers Compared

05, free tools and reference

Work the numbers before you ask anyone

No sign up, free to cite, and the answers are on the page whether or not you use the calculator.

kVA to amps

Full load current at every standard rating and voltage.

Transformer sizing

What size a service needs, with the 80 percent figure.

kVA to kW

Apparent to real power, and why the rating is in kVA.

Three phase formulas

Current, kVA, kW, turns ratio and fault current, each worked.

Dimensions and weights

Footprint, height and weight for 45 to 2500 kVA.

Wiring diagrams

Delta wye and all four connections, drawn. Free to reuse.

Glossary

Dead front, loop feed, impedance, BIL, ONAN, defined plainly.

23 guides

Lead times, efficiency rules, testing, installation.

Power transformers

MVA ratings, cooling classes, and why lead times run into years.

Substations

Every piece of equipment on the site and what it does.

Send us the spec

Rating, voltages and the date. You get a delivered price and a factory price side by side, the incoterm named, the country of manufacture stated, and freight and duty on their own lines.

Get a quoteor call 786 220 2801