Company base: Sugar Land, Texas · Nationwide sales · Tommy Marco

346-276-9540 tommy@jjtransformers.com

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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.

J&J Transformers LLC · 346-276-9540 · tommy@jjtransformers.com

Published specifications for 2 alternatives. Availability remains subject to prior sale and written reconfirmation.
Compare300 MVA 138/34.5 kV Georgia TransformerJJ-TX-00142 MVA 138/34.5 kV Virginia TransformerJJ-TX-102
ManufacturerGeorgia TransformerVirginia Transformer
Rating / output180/240/300 MVA; 63/84/105 MVA tertiary25.2/33.6/42 MVA
Voltage / winding arrangement138/34.5 kV with 12 kV buried-delta tertiary138/34.5 kV
Vector groupYNyn0+d1Winding connections and phase shift to confirm
FrequencyNot documented; confirm with J&JNot documented; confirm with J&J
CoolingNot documented; confirm with J&JNot documented; confirm with J&J
Impedance and baseNot documented; confirm with J&JNot documented; confirm with J&J
Tap changerNot documented; confirm with J&JNot documented; confirm with J&J
Insulation / BILNot documented; confirm with J&JNot documented; confirm with J&J
Quantity represented1 documented unit1 schedule entry; individual identity to confirm
Technical details / open itemsONAN/ONAF/ONAF, 60 Hz, three-phase, vector group YNyn0+d1; Measured 138/34.5 kV impedance: 9.67% on a 180 MVA base; Copper windings, conservator system, Type II mineral oil, and HV OLTCRatings 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 reviewedSerial-specific nameplate reviewedJ&J-submitted inventory schedule; matching unit-specific technical records to confirm
Technical value basisSerial-specific nameplate reviewedSubmitted inventory schedule; manufacturer and electrical rating are representations, not an individual nameplate match.
Details to confirmMatching technical records, current condition, complete equipment scope and transport detailsIndividual 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 conditionBrand new, never used and never energized; 2020 nameplate reviewedCondition and service history require confirmation
Equipment locationUSALocation confirmed with quotation
Technical records reviewed2026-10-082026-10-08
AvailabilityAvailable for sale — confirmed by J&J October 8, 2026; quotation and release terms on requestListed for inquiry by J&J; current allocation and release timing require written confirmation
Availability last confirmed2026-10-08Request current confirmation
Shipping estimateRequest a written dispatch and delivery scheduleRequest a written dispatch and delivery schedule
Nameplate reviewedYes — request the unit packageNot recorded as reviewed; request it
Drawings reviewedNot recorded as reviewed; request themNot recorded as reviewed; request them
Factory test report reviewedNot recorded as reviewed; request test recordsNot recorded as reviewed; request test records
This unit only Request more info Request more info

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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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