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 | 116 MVA 138 kV Transformer Positions — 2027JJ-TX-205 | 50 MVA-Class 138/13.8 kV Substation PackageJJ-TX-007 |
|---|---|---|
| Manufacturer | Manufacturer disclosed in the qualified technical package | Manufacturer to confirm |
| Rating / output | 116 MVA stated maximum | 30/39.9/50 MVA at 55 C; 33.6/44.7/56 MVA at 65 C |
| Voltage / winding arrangement | 138 kV HV; secondary voltage requires confirmation | 138 kV delta / 13.8 kV grounded wye |
| Vector group | Requires confirmation | Delta–Grounded Wye; clock to confirm |
| Frequency | Requires confirmation | 60 Hz |
| Cooling | Not documented; confirm with J&J | ONAN / ONAF / ONAF |
| Impedance and base | Not documented; confirm with J&J | Not documented; confirm with J&J |
| Tap changer | Not documented; confirm with J&J | Five-position HV DETC: 131.1, 134.55, 138, 141.45 and 144.9 kV (±5%, 2.5% steps) |
| Insulation / BIL | Not documented; confirm with J&J | HV 650 kV; LV 110 kV, drawing basis |
| Quantity represented | 2 offered positions | 1 represented design package |
| Technical details / open items | Seller offer summary; exact cooling stages require confirmation.; 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. | Oil-immersed substation transformer; ONAN/ONAF/ONAF, 60 Hz, three-phase; HV de-energized tap range: 131.1-144.9 kV; Final impedance, serial number, test data, and manufacture date are not populated |
| Evidence reviewed | Seller offer summary; exact cooling stages require confirmation | Project-specific supplied approval drawings reviewed; final equipment OEM and serial identity require confirmation |
| Technical value basis | Received production offer and existing reviewed design package; final individual nameplates and factory tests remain pending. | Supplied approval design drawings; a completed individual nameplate and final equipment identity have not been established. |
| Details to confirm | Match the final design/rating and drawing revision to each offered manufacturing position; Final frequency, cooling/rise, winding duty, impedance/base, BIL, taps, accessories and transport dimensions/weights | Final OEM, individual equipment identity, manufacture year, tested impedance and factory reports; Final drawings, current preservation, complete accessories and shipping configuration |
| Represented condition | Factory manufacturing position; completion pending | Brand new, never used and never energized; 2024 approval drawings reviewed; serial identity requires confirmation |
| Equipment location | Dispatch location confirmed with quotation | USA |
| Technical records reviewed | 2026-10-08 | 2026-10-08 |
| Availability | 2027 manufacturing positions offered for allocation; current release terms require written confirmation | Available; approval drawings reviewed; unit identity requires documentation; 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 | Not recorded as reviewed; request it |
| Drawings reviewed | Not recorded as reviewed; request them | Yes — request matching unit drawings |
| 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.
Match the nameplate to the specification · Review surplus equipment records · Procurement checklist