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Compare equipment before you request it.
Review the published facts side by side. Matching a voltage or MVA rating does not establish compatibility. Ask your project engineer to review the complete unit records.
| Compare | 208 MVA 138/34.5 kV Transformer — 2027JJ-TX-203 | Five 110 MVA 138/34.5 kV Kolektor ETRA GSUsJJ-138-110-5 |
|---|---|---|
| Manufacturer | Manufacturer disclosed in the qualified technical package | Kolektor ETRA |
| Rating / output | 125/166/208 MVA | 66/88/110 MVA; 22/29.333/36.666 MVA tertiary |
| Voltage / winding arrangement | 138 kV HV / 34.5 kV LV | 138/34.5 kV with 13.8 kV tertiary |
| Vector group | Grounded wye / grounded wye | YNyn0+d11 |
| Frequency | 60 Hz | 60 Hz |
| Cooling | ONAN / ONAF1 / ONAF2 | ONAN / ONAF1 / ONAF2 |
| Impedance and base | H–X 9% at 125 MVA (supplied design sheet) | Reviewed nameplate H–X: 8.09% at 66 MVA; supplied FAT reports 13.41% at 110 MVA. Match the test and plate to the selected unit. |
| Tap changer | HV OLTC ±8 × 1.25% (±10%); no taps shown on X or Y windings | HV OLTC; 124.2–151.8 kV (±10%); 16 raise / 16 lower steps of 0.625% on the reviewed plate |
| Insulation / BIL | HV line 650 kV; HV neutral, LV line and LV neutral 200 kV | Not documented; confirm with J&J |
| Quantity represented | 1 offered position | 5 units; matching unit packages available on request |
| Technical details / open items | Supplied design data sheet; final unit-specific nameplate and FAT pending.; Ask J&J for the included U.S.-port shipping, commissioning and manufacturer warranty scope in the written offer.; Modifications can be reviewed before completion; feasibility, cost and schedule impact require OEM confirmation.; Any warranty provider, scope, transfer eligibility, start date and commissioning boundary must appear in the written quotation.; Design basis: ONAN/ONAF1/ONAF2, 60 Hz, 65 C temperature rise; grounded-wye high and low sides.; HV OLTC design range ±10%; preliminary 13.8 kV open-delta tertiary. Final unit-specific configuration requires approval.; Design H-X impedance: 9% at a 125 MVA base. This is a design-sheet value, not a final tested result. | GSU duty; ONAN/ONAF1/ONAF2, 60 Hz, three-phase, vector group YNyn0+d11; Measured impedance: 13.41% on a 110 MVA base at nominal tap; 2020 factory tests passed; those records do not establish current condition; Five-unit lot includes two 2020 builds and three 2021 builds; request all five serial-specific packages before quotation |
| Evidence reviewed | Supplied design data sheet; final unit-specific nameplate and FAT pending | Five-unit opportunity confirmed by seller; rating plate and FAT package reviewed for one unit |
| Technical value basis | Supplied guaranteed design sheet; these are design values, not final tested values for an individually matched unit. | One supplied nameplate and one factory-test package; values are not established for all five units. |
| Details to confirm | Final unit-specific nameplate, approved revision, tested impedance/losses and final tertiary arrangement; Conductor, OLTC switch specification, complete accessories, current photos and preservation or manufacturing progress | All five matching nameplates, insulation levels, approved drawings and factory tests; Reconcile unit-specific impedance bases; confirm current preservation and individual shipping weights |
| Represented condition | Factory manufacturing position; completion pending | Brand new, never used and never energized; 2020 factory records reviewed for one unit |
| Equipment location | Dispatch location confirmed with quotation | International; dispatch location confirmed with quotation |
| Technical records reviewed | 2026-10-08 | 2026-10-08 |
| Availability | 2027 manufacturing positions offered for allocation; current release terms require written confirmation | Available; 5 units represented; remaining unit packages require review; subject to prior sale and written confirmation |
| Availability last confirmed | Request current confirmation | 2026-09-24 |
| Shipping estimate | Projected 2027 completion; shipment and receiving dates require written confirmation | Request a written dispatch and delivery schedule |
| Nameplate reviewed | Not recorded as reviewed; request it | Yes — request the unit package |
| Drawings reviewed | Not recorded as reviewed; request them | Not recorded as reviewed; request them |
| Factory test report reviewed | Not recorded as reviewed; request test records | Report reviewed; confirm matching records for each unit |
| This unit only | Email for specs & price | Email for specs & price |
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Confirm frequency, cooling-stage ratings, impedance and its base, taps, vector group, grounding, BIL, site conditions and included scope against the project specification. A table cannot approve the fit.
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