Your equipment shortlist
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 | 220 MVA 345/34.5 kV Prolec GE TransformerJJ-TX-002 | 260 MVA 345/34.5 kV Siemens TransformerJJ-TX-114 |
|---|---|---|
| Manufacturer | Prolec GE | Siemens |
| Rating / output | 132/176/220 MVA; 46.2/61.6/77 MVA tertiary | 260 MVA |
| Voltage / winding arrangement | 345/34.5 kV with 13.8 kV delta tertiary | 345/34.5 kV |
| Vector group | Grounded Wye–Wye / Delta; clock to confirm | Winding connections and phase shift to confirm |
| Frequency | 60 Hz | Not documented; confirm with J&J |
| Cooling | ONAN / ONAF / ONAF | Not documented; confirm with J&J |
| Impedance and base | Design H–X: 12.0% at 132 MVA | Not documented; confirm with J&J |
| Tap changer | Not documented; confirm with J&J | Not documented; confirm with J&J |
| Insulation / BIL | Not documented; confirm with J&J | Not documented; confirm with J&J |
| Quantity represented | 1 documented unit | 1 schedule entry; individual identity to confirm |
| Technical details / open items | Collector step-up duty; ONAN/ONAF/ONAF, 60 Hz, three-phase; Grounded-wye / grounded-wye / delta winding configuration; Nominal design H-X impedance: 12.0% on a 132 MVA base | Ratings and manufacturer are transcribed from the J&J-submitted schedule; verify them against the matching nameplate and current technical package.; Service history, present condition, frequency, winding arrangement, impedance, tap changer and accessories require unit-specific confirmation.; Historical schedule dates do not establish current dispatch timing, manufacture year or transferable warranty. Request present release terms and any applicable warranty in writing. |
| Evidence reviewed | Serial-specific nameplate and approval drawings reviewed | J&J-submitted inventory schedule; matching unit-specific technical records to confirm |
| Technical value basis | Supplied nameplate and approval drawings; design values require matching final factory records. | Submitted inventory schedule; manufacturer and electrical rating are representations, not an individual nameplate match. |
| Details to confirm | Final tested impedance, insulation levels, complete tap schedule and approved drawing revision; Overall and shipping dimensions, shipping weight, accessory schedule and current preservation | Individual identity and quantity, current photos, condition/service history and preservation; Frequency, cooling/rise, winding connections and clock, impedance/base, BIL, conductor/fluid and tap schedule; Factory/current tests, included accessories, dimensions/weights and final release/transport scope |
| Represented condition | Brand new, never used and never energized; approval drawings reviewed | Condition and service history require confirmation |
| Equipment location | USA | Location confirmed with quotation |
| Technical records reviewed | 2026-10-08 | 2026-10-08 |
| Availability | Available; nameplate and approval drawings reviewed; subject to prior sale and written confirmation | Listed for inquiry by J&J; current allocation and release timing require written confirmation |
| Availability last confirmed | 2026-09-24 | Request current confirmation |
| Shipping estimate | Request a written dispatch and delivery schedule | Request a written dispatch and delivery schedule |
| Nameplate reviewed | Yes — request the unit package | Not recorded as reviewed; request it |
| Drawings reviewed | Yes — request matching unit drawings | Not recorded as reviewed; request them |
| Factory test report reviewed | Not recorded as reviewed; request test records | Not recorded as reviewed; request test records |
| This unit only | Email for specs & price | Email for specs & price |
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What still needs to be checked?
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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