Cast-Coil Transformer Buyers
Epoxy-encapsulated cast-coil units built for harsh, humid and high-load environments. Because they were expensive new and are durable used, they hold value better than any other dry-type.
| Ratings bought | 300 kVA – 10 MVA |
|---|---|
| Primary | 2.4 kV – 34.5 kV |
| Construction | Epoxy vacuum-cast, encapsulated windings |
| Enclosure | NEMA 1, NEMA 3R, open core-and-coil |
| Typical service | Mills, marine, mining, data centers |
| Value driver | Copper windings, low hours, intact coils |
Selling Cast-Coil Transformers
Why cast-coil holds value
Cast-coil construction was specified where an oil-filled unit was unacceptable and a standard ventilated dry-type would not survive: paper mills, wastewater plants, offshore and marine installations, mines, high-humidity process areas. Those units cost a great deal new, and a used one with sound coils is a genuine bargain to the next buyer. That flows back into our offer.
Inspecting the coils
The failure mode to look for is cracking or crazing in the epoxy, particularly at the coil ends and around the tap leads. Surface dust and discoloration are cosmetic. Send close photographs of the coil faces and we can usually assess condition without a site visit.
Where they come from
Most cast-coil units reach us through plant closures, process line changes and data center capacity refreshes. Because the equipment is often in a tight electrical room within a running facility, removal scheduling matters more than price to most sellers — and scheduling is something we control.
Questions About These Units
A coil is visibly cracked. Still worth calling?
Do you buy cast-coil units without enclosures?
Other Equipment We Buy
Padmount Transformers
Pad-mounted distribution transformers are the single most liquid item we buy. A dead-front loop-feed unit in the 75 to 2500 kVA range with a legible nameplate and a sound tank can be priced from photographs the same day.
75 kVA – 5000 kVA300+ oil-filled units purchased annuallyOil-Filled Transformers
Liquid-filled units — mineral oil, silicone or ester — from 25 kVA pole-mounts up to 20 MVA power transformers. Oil is not a problem for us; containment, testing and disposal are part of what we do.
25 kVA – 20 MVA120–160 dry-type units handled per yearDry-Type Transformers
Ventilated, sealed and cast-coil dry-type units from 15 kVA control transformers up to 5000 kVA unit substation sections. Copper-wound units carry a materially higher offer than aluminum.
15 kVA – 5000 kVA40–60 substation-class units per yearSubstation Transformers
Station-class and power transformers from 1 MVA to 100 MVA, including units with load tap changers, radiator banks and conservator tanks. These are heavy-haul projects and we run them end to end.
1 MVA – 100 MVALots of 10 to 400 units purchased at a timePole-Mount Transformers
Single-phase and three-phase overhead distribution transformers, 5 kVA to 500 kVA. This is a volume item — we buy them by the pallet and by the trailer load out of utility and co-op surplus programs.
5 kVA – 500 kVA25–40 complete lineups per yearUnit Substations
Complete primary-transformer-secondary lineups: incoming section, transformer, and low-voltage switchgear or switchboard bolted as one assembly. We buy them whole and we buy them by the section.
300 kVA – 5000 kVASend the nameplate from your cast-coil transformers and we will return a firm number, usually the same business day. Payment is issued before loading and the rigging is ours.
Selling cast-coil transformers?
Same-day offers, payment upfront before loading, no testing required, freight and rigging covered nationwide.