New & Used Transformers for Sale

Used and surplus dry-type distribution transformers (15–225 kVA) typically list for $1,500–$12,000; pad-mount and pole-mount units run $2,000–$25,000, and reconditioned substation transformers are quoted from about $75,000. Electrical Trader lists new, surplus and reconditioned units from Eaton, Square D, GE, ABB, Hammond, Federal Pacific and others, sold by verified sellers across the USA.

Updated automatically from live inventory · Sold by verified sellers · Freight quotes available

In Stock Now

4 units · pulled live from inventory
Power Partners 100 kVA single-phase pole-mount transformer (34500V to 120V), new — Electrical Trader
New
100 KVA Pole Mount Transformer
$13,000
Power Partners 167 kVA single-phase pole-mount transformer (34500V to 120V), new — Electrical Trader
New
167 KVA Pole Mount Transformer
$23,000
Westinghouse 2000 kVA 3-phase substation transformer, reconditioned (2024) — Electrical Trader
Refurbished
2000kVA 3-Ph., Substation Transformer, Reconditioned
$75,000
ABB 300 kVA three-phase pad-mount transformer (V14E538SZQ), refurbished (2019) — Electrical Trader
Refurbished
300 KVA Refurbished Transformer
$18,500

Tell us what you need

Tell us the kVA or MVA rating, primary and secondary voltage, phase, and oil-filled or dry-type — plus when you need it. We'll match you with consignment and new-surplus transformers before they're listed publicly, or source one through our seller network.

Get a Power Quote →

What to Check Before Buying a Transformer

kVA rating & load

Size to the connected load with room for growth. Undersized units overheat; oversized units waste no-load energy around the clock. Check the nameplate kVA and cooling class (AA, FA, ONAN, ONAF), not the listing title.

Voltage, phase & connection

Match primary and secondary voltage exactly (480 V delta to 208Y/120 V, 13.8 kV to 480Y/277 V) and single- vs three-phase. Primary taps (usually ±2 × 2.5%) give a small adjustment range; they don't fix a wrong voltage class.

Impedance (%Z) & fault current

The nameplate %Z sets the available fault current on the secondary. Enter kVA, secondary voltage and %Z into our Fault Current Calculator and confirm downstream breakers have the interrupting rating to match.

Dry-type vs liquid-filled

Dry-type suits indoor, lower-kVA distribution with minimal maintenance. Pad-mount and substation units are usually liquid-filled (mineral oil or FR3 ester) for higher kVA; budget for containment and periodic oil testing.

Enclosure, temperature rise & efficiency

NEMA 1 indoor vs NEMA 3R outdoor; 80, 115 or 150 °C rise; K-factor rating for nonlinear loads. New units built since 2016 meet DOE efficiency levels — older surplus may not.

Condition & test records

For used or reconditioned units ask for turns-ratio (TTR), insulation-resistance and winding-resistance results, plus oil dielectric and DGA on liquid-filled units. Nameplate photos and manufacture year at minimum.

Frequently Asked Questions

How much does a used transformer cost?
Current listings run about $1,500–$12,000 for dry-type distribution units, $2,000–$25,000 for pad-mount and pole-mount units, and from $75,000 for reconditioned substation transformers, depending on kVA, voltage class, condition and age.
Is a used or reconditioned transformer safe to put in service?
Yes, when it has passed turns-ratio, insulation-resistance and winding-resistance tests (plus oil testing for liquid-filled units). Reconditioned units from specialist shops often carry a seller warranty — check the listing.
Do listings include nameplate data and test reports?
Listings show kVA, voltages, impedance and condition where the seller has provided them, with nameplate photos at minimum. Request test reports and drawings through the Power Quote form before purchase.
Can you source a specific kVA or voltage?
Yes. Send the kVA, primary/secondary voltage, phase and required date through the Power Quote form and we'll match it against consignment inventory and our seller network.