Pad-Mounted Transformer Buyers

Sell pad-mounted equipment without losing useful information

A pad-mounted transformer is a ground-level distribution transformer in a steel cabinet, typically placed on a concrete pad. It appears at commercial and industrial sites, campuses, developments, utilities, and renewable-energy projects. An upgrade, decommissioning, or inventory change can make an intact unit surplus.

We evaluate pad-mounted transformers for purchase from the actual equipment and the practical path to moving it. Start with the nameplate and a direct description of status. That helps separate usable surplus equipment from units needing a more limited review because of damage, missing parts, oil concerns, or unknown history.

Start With the Nameplate: kVA, Voltage, Phase, and Manufacturer

The nameplate is the strongest starting point. It identifies the manufacturer, serial number, rating, voltage relationship, phase, cooling or fluid information, and other design details. Send a clear, square photograph rather than a typed estimate. Include every readable line, especially tap information, impedance, or connection designation.

kVA is the apparent-power rating, not proof of present condition. Primary and secondary voltages show the intended system relationship. Phase is equally important: single-phase and three-phase pad-mount units serve different applications. If the plate is missing or obscured, send exterior photos, dimensions if known, and records that may identify the transformer.

• Manufacturer, model or catalog number, serial number, and year if shown
• kVA, phase, primary and secondary voltage, and tap information
• Fluid type, visible warning or PCB labels, and overall cabinet photographs
• Nameplate, pad interface, and connection-compartment photos when safely accessible

Radial Feed or Loop Feed: Describe the Primary Arrangement Accurately

Radial and loop feed describe the medium-voltage system arrangement. A radial arrangement has a dedicated primary path to the transformer. In a loop, the primary circuit can pass through the transformer location and be supplied from either end, with an open point managed in the system. Loop-feed transformers generally provide for that through connection; radial-feed equipment does not need it.

Do not guess at the arrangement. Tell us whether records identify the unit as radial or loop feed. Photograph the high-voltage compartment and any switches, elbows, bushings, or parking stands without moving them. We evaluate the nameplate, layout, accessories, and available records together.

Cabinet Condition and Accessories Affect the Evaluation

An intact cabinet protects both the transformer and the information needed to identify it. Note corrosion, impact damage, bent doors, compromised locks, missing panels, water intrusion, vandalism, or signs of a leak. Photograph each exterior side first, then affected areas. Show the pad clearance and nearby ground condition.

Accessories affect what is present with the unit. Depending on its design, these may include elbows, bushings, arresters, fuses, gauges, pressure-relief devices, switches, grounding hardware, low-voltage terminals, and barriers. List what remains attached, what is removed, and what is loose but available.

• Doors, hinges, locks, panels, seals, corrosion, and open ports
• High- and low-voltage connection hardware, switches, fuses, and arresters
• Oil staining, damaged or missing bushings, and disconnected parts
• Pad condition, route, clearance, and room for loading equipment

State Whether It Is Surplus, Removed Working, or Failed

Surplus equipment may be installed but unneeded, or warehouse inventory never energized. Removed-working equipment was taken out of service while known to operate, subject to records and the reason for removal. Those are distinct facts, and both are more useful than a general claim that a transformer is “good.”

A failed transformer can still be submitted. Describe any reported fault, relay event, test result, leak, fire exposure, or reason for removal. Known failure information changes the purchase review and may mean a conditional purchase does not proceed. If no history is available, say so plainly; unknown history is not proof of working condition.

Keep Oil-Filled Equipment Intact and Identify PCB Status

Do not drain, transfer, or mix transformer fluid to prepare a unit for sale. Keep an oil-filled transformer upright, closed, and protected from damage while it is reviewed. Photograph fluid labels and the areas beneath valves, radiators, seams, and bushings. Identify staining, seepage, or a release before an evaluation.

A mineral-oil label does not prove that the fluid has no PCB contamination. EPA guidance says testing is the only way to determine whether a mineral-oil transformer has been PCB contaminated. Share laboratory results, PCB marks, fluid records, or prior handling records. If status is unknown, state that rather than mixing the fluid with other used oil.

From transformer photos to purchase terms

Send nameplate and overall photos, condition notes, equipment location, ownership or disposal authority, and access details. We review rating, voltage, phase, primary arrangement, fluid and documentation, completeness, apparent condition, and loading feasibility. We may ask focused questions where a missing detail changes the evaluation.

If the equipment fits an available purchase or recovery route, the next step is to confirm its condition, release timing and collection scope. Agree on the units and accessories included, inspection conditions, loading responsibility, freight and payment terms before release. Send updated information if equipment or access changes. The offer and pickup plan must match the actual transformer, not an incomplete description.

• Submit each serial-numbered unit separately, even if units look alike
• Separate photos and records for accessories, spare bushings, and loose hardware
• Identify site contacts who can confirm access, isolation status, and release authority
• Keep the unit available in the stated condition during the evaluation

If the transformer is still installed or serving a load

You can begin a sale inquiry before the transformer is physically removed. Explain whether it is still energized, disconnected but attached to cables, or already released from service. Share existing asset records and exterior photos taken under the site’s normal safety procedures. Do not unlock compartments, disturb connections or arrange an improvised lift just to improve the listing. The equipment’s release status affects the schedule and the responsibilities that must be agreed before collection.

For a planned replacement, include the expected outage or release window and the person authorized to approve disposition. Describe whether the transformer belongs to the property owner, the utility or another organization; equipment sitting on your property is not automatically yours to sell. If ownership or dimensions are uncertain, identify the uncertainty early. The buyer can then ask for the relevant records while the site’s qualified professionals handle disconnection and any access work.

Multi-Unit Inventories and Loading Access

For several transformers, provide an inventory list, not one set of representative photos. Record each serial number, rating, phase, voltage, manufacturer, condition category, and location. Mixed inventories often contain different ratings or configurations and need separate purchase decisions. Matching rows and photos prevent an intact unit from being confused with a damaged or incomplete one.

Value and loading feasibility are related but separate. A tight pad location, blocked driveway, soft ground, limited turning area, overhead obstruction, or crane requirement can change the removal plan. Show the route from the pad to the street or loading point. Confirm the transformer is de-energized and the responsible site party controls access before anyone approaches the compartment or prepares it for loading.