One surplus 15/20/25 MVA (16.8/22.4/28 MVA at 65 °C) substation transformer, 69 kV delta to 24.94 GrdY/14.4 kV, with on-load tap changer. Built 1993 by Cooper Power Systems (McGraw-Edison). Removed from utility service for a capacity upgrade. Located in Florida near Tampa. Sold as-is, where-is. Subject to prior sale.
CTG Power Systems is offering one (1) surplus three-phase, 60 Hz substation power transformer with on-load tap changer. It was built in December 1993 by Cooper Power Systems (McGraw-Edison) in the United States and is available now in Florida, near Tampa.
The unit is rated 15/20/25 MVA at 55 °C and 16.8/22.4/28 MVA at 65 °C, OA/FA/FA. It steps 69 kV delta down to 24.94 GrdY/14.4 kV, with a McGraw-Edison on-load tap changer on the low-voltage side and copper windings throughout. Per the owner, the transformer was removed from utility service about two years ago for a capacity upgrade.
It is a good fit for OEMs, transformer service shops, and utilities that want a proven core-and-coil platform for refurbishment, remanufacture, or a system spare.
Condition: Surplus, decommissioned from service. Sold as-is, where-is, without warranty.
| Manufacturer | Cooper Power Systems (McGraw-Edison), U.S.A. |
| Year built | December 1993 |
| Type | Three-phase, two-winding, load tap changing power transformer, outdoor substation service |
| Rating | 15,000 / 20,000 / 25,000 kVA at 55 °C rise; 16,800 / 22,400 / 28,000 kVA at 65 °C rise |
| Cooling class | OA/FA/FA (ONAN/ONAF/ONAF) |
| High voltage | 69,000 V delta; de-energized tap changer, 5 positions (±2 x 2.5%) |
| Low voltage | 24,940 GrdY/14,400 V, neutral X0 brought out |
| Phase relationship | Delta-wye, ANSI standard angular displacement |
| Frequency | 60 Hz |
| Impedance | 7.1% at 15,000 kVA |
| Load tap changer | McGraw-Edison, separate oil-filled compartment, motor operated, 33 positions (16R-N-16L), ±10% in 0.625% steps, LTC-4C controller |
| Rated current at 28 MVA | HV 234 A; LV 648 A |
| Windings | Copper |
| High voltage | 350 kV |
| Low voltage | 150 kV |
| Cooling | Detachable radiators with two stages of forced-air fans |
| Insulating fluid | Mineral oil, non-PCB |
| Oil volume | 3,936 US gal total (main tank 3,162, LTC 300, radiators 474) |
| Oil preservation | Sealed tank, nitrogen gas-pressure system |
| Bushings | ABB Type O+C with test taps. HV 69 kV, 400 A (1993). LV 25 kV, 1,200 A (replaced 2015). |
| Bushing CTs | HV 600:5 multi-ratio C400; LV 1200:5 multi-ratio C400; winding hot-spot CT |
| Potential transformers | Three (3) external LV PTs, 14,400-120 V |
| Instruments | Liquid level, liquid and winding temperature, pressure/vacuum gauge, nitrogen cabinet, LTC operations counter |
| Total weight | 95,865 lb (43,484 kg) |
| Core and coils (heaviest untanking piece) | 39,550 lb (17,940 kg) |
| Tank and fittings | 16,295 lb |
| Detachable radiators | 9,400 lb |
| Oil (all compartments) | 29,520 lb |
Documents are shared with qualified buyers on request.
Located in Florida, near Tampa. Exact site is disclosed when an inspection is scheduled. Sold as-is, where-is. Draining, dismantling, rigging, loading, and transport are the buyer's responsibility. Inspection and oil sampling welcome by appointment at the buyer's cost. Pricing on request. Offered to principals only; brokers and intermediaries are not accepted. Subject to prior sale. Please reference Lot FL-XFMR28.
Offered AS-IS, WHERE-IS, WITH ALL FAULTS, and WITHOUT WARRANTY OF ANY KIND, express or implied, including any implied warranty of merchantability or fitness for a particular purpose. Specifications are taken from the manufacturer's nameplate and the owner's records and are provided for information only. Subject to prior sale and to execution of a definitive written purchase agreement.
