- High-side voltage
- 345 kV
- Low-side voltage
- 34.5 kV
- Listed quantity
- On request
Georgia Transformer 108/144/180 MVA
345 kV / 34.5 kV gsu transformer for sale
345 kV high side / 34.5 kV low side
Equipment ID: GA446-FA
Equipment photographs & nameplate documents
Reference drawing; manufacture year and final impedance fields are unfilled. Select an image to view it full size.
Equipment specifications
- Manufacturer
- Georgia Transformer
- Equipment ID
- GA446-FA
- Application
- GSU transformer
- Power rating
- 108/144/180 MVA
- High-side voltage
- 345 kV
- Low-side voltage
- 34.5 kV
- Catalog condition
- New & unused
- Listed quantity
- On request
- Manufacture year
- Not stated on supplied nameplate
- Tap changer
- HV neutral on-load tap changer, VACUTAP VM III 500Y 123/C–18 35 3W
- Nameplate ratings
- 108 / 144 / 180 MVA
- High side
- 345 kV grounded wye
- Low side
- 34.5 kV grounded wye
- Phase / frequency
- 3-phase / 60 Hz
- Cooling
- ONAN / ONAF / ONAF
- Vector group
- YNyn0+d1
- HV regulation
- ±16 × 0.9375% with OLTC
- Tertiary
- 12 kV buried delta; unloaded
- Manufacturer shown on drawing
- Georgia Transformer
- Manufacturer serial / instruction reference
- GA446A
- Manufacturer location
- Rincon, Georgia, USA
- Transformer construction
- Core type
- Cooling stages
- ONAN / ONAF / ONAF
- HV / LV rating
- 108 / 144 / 180 MVA
- Buried tertiary rating (unloaded)
- 37.8 / 50.4 / 63 MVA
- HV voltage
- 345,000 V grounded wye / 199,186 V phase-to-neutral
- LV voltage
- 34,500 V grounded wye / 19,919 V phase-to-neutral
- Buried tertiary voltage
- 12,000 V delta; grounded inside
- Standard
- IEEE C57.12.00–2015
- Temperature rise
- 65 °C
- HV regulation / tap range
- ±16 × 0.9375%; 396,750 to 293,250 V
- HV line winding / bushing BIL
- 1,050 / 1,300 kV
- HV neutral winding / bushing BIL
- 200 / 200 kV
- LV line winding / bushing BIL
- 200 / 200 kV
- LV neutral winding / bushing BIL
- 200 / 200 kV
- Conductor material
- Copper
- Ambient temperature marking
- −20/30/45 °C (as printed)
- Elevation
- Less than 3,300 ft
- Seismic rating
- Z1 & Z2
- Oil preservation system
- Conservator
- Insulating oil
- Type II mineral oil
- Impedance
- Not populated; winding-pair bases shown as 108 MVA
- Untanking weight
- 29,542 lb / 13,400 kg
- Tank and fittings weight
- 144,007 lb / 65,321 kg
- Core and coils weight
- 225,041 lb / 102,077 kg
- Insulation weight
- 15,754 lb / 7,146 kg
- Total weight
- 486,874 lb / 220,842 kg
- Shipping weight without oil
- 302,308 lb / 137,125 kg
- Total oil at 25 °C
- 117,826 lb / 53,445 kg; 15,775 gal / 59,715 L
- Main-tank oil
- 13,735 gal / 51,993 L
- Radiator oil
- 1,544 gal / 5,845 L
- LTC oil
- 60 gal / 227 L
- Conservator oil at 25 °C
- 400 gal / 1,514 L
- Oil-volume consistency
- Listed component volumes do not sum to the stated total; confirm final filling schedule
- Maximum positive oil-system pressure
- 45 kPa / 6.5 psi
- Vacuum filling design
- 103 kPa / 15 psi; transformer designed for full vacuum
- Nameplate drawing dimensions
- 420 × 594 mm
- Manufacture year
- Not populated on drawing
- PCB note
- Less than 2 ppm at manufacture, per drawing
Equipment overview
Georgia Transformer generator step-up design rated 108/144/180 MVA for 345/34.5 kV service. The existing public nameplate documents copper windings, on-load voltage regulation and an unloaded 12 kV buried tertiary.
Reference drawing; manufacture year and final impedance fields are unfilled.
HV tap schedule
| Position | Voltage (V) | Current at 180 MVA (A) |
|---|---|---|
| 16R | 396750 | 262 |
| 15R | 393520 | 264 |
| 14R | 390280 | 266 |
| 13R | 387050 | 269 |
| 12R | 383810 | 271 |
| 11R | 380580 | 273 |
| 10R | 377340 | 275 |
| 9R | 374110 | 278 |
| 8R | 370880 | 280 |
| 7R | 367640 | 283 |
| 6R | 364410 | 285 |
| 5R | 361170 | 288 |
| 4R | 357940 | 290 |
| 3R | 354700 | 293 |
| 2R | 351470 | 296 |
| 1R | 348230 | 298 |
| NR / N / NL | 345000 | 301 |
| 1L | 341770 | 304 |
| 2L | 338530 | 307 |
| 3L | 335300 | 310 |
| 4L | 332060 | 313 |
| 5L | 328830 | 316 |
| 6L | 325590 | 319 |
| 7L | 322360 | 322 |
| 8L | 319130 | 326 |
| 9L | 315890 | 329 |
| 10L | 312660 | 332 |
| 11L | 309420 | 336 |
| 12L | 306190 | 339 |
| 13L | 302950 | 343 |
| 14L | 299720 | 347 |
| 15L | 296480 | 351 |
| 16L | 293250 | 354 |
LV and tertiary currents
| Winding | Voltage (V) | Rating (MVA) | Current (A) |
|---|---|---|---|
| LV | 34500 | 180 | 3012 |
| Buried tertiary | 12000 | 63 | 3031 |
Document scope & verification
Specifications were transcribed from the supplied nameplate drawing. Confirm the final unit nameplate, factory test report, accessories and shipping configuration before purchase. Blank fields, asterisks and draft values have not been treated as final test results. Drawing dimensions describe the nameplate itself, not the transformer footprint.
Freight and delivery scope quoted on request.
Listing details
Georgia Transformer generator step-up design rated 108/144/180 MVA for 345/34.5 kV service. The existing public nameplate documents copper windings, on-load voltage regulation and an unloaded 12 kV buried tertiary.
Winding connections, secondary options, included accessories, and tap-changer details must be checked against the unit-specific nameplate and drawings. The description above preserves the listed configuration.
Plan the purchase and delivery
Review the transformer procurement checklist, the technical documentation guide, and delivery planning requirements.
Looking for a different unit? Browse new & unused inventory and pre-owned transformers, or ask about additional sourcing options.
Request the technical package
Ask our team for the records available for this equipment and confirmation of its current status.
- Nameplate & winding diagram
- General arrangement drawings
- Equipment photographs
- Factory or field test reports
- Condition & service history
- Dimensions & shipping weights
Document availability varies by unit. Pricing, location, lead time, warranty, and delivery scope are provided with the quotation.
How do I confirm availability?
Email the equipment ID or call (248) 250-0407. Equipment is subject to prior sale. Current availability and allocation are confirmed in writing.
Can you coordinate transportation and installation?
Yes. We coordinate shipment preparation, oil services, heavy haul, rigging, placement, and qualified installation support as an agreed project scope. Explore full-service solutions.
What purchase and warranty options apply?
Terms depend on the equipment, condition, seller, and agreed scope. Review purchase options and request a unit-specific quotation.
Listing document
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