Transformers & Substations

36 kV Oil-Immersed Power Transformer

2.5 – 31.5 MVA · 36 kV class

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Entogo 36 kV class three-phase oil-immersed power transformer for substations

Entogo’s 36 kV class oil-immersed power transformer is a three-phase, liquid-filled unit built for substation and subtransmission service on 34.5 / 35 kV networks across North America, Europe and export markets. Ratings span 2.5 to 31.5 MVA with ONAN / ONAN-ONAF cooling, copper windings on a CRGO silicon-steel core-form, and a full standards envelope covering IEEE C57.12.00 / C57.12.10, IEC 60076 and CSA C88.

Mechanical and electrical configuration is specified per project — vector group, BIL, tap-changer type (DETC standard, OLTC optional with motor drive and AVR), bushing style, insulating liquid (mineral oil standard, FR3 natural ester for fire-safer urban siting) and accessory protection package (Buchholz, pressure-relief, oil-temperature and winding-temperature indicators). The result is a substation transformer that drops into utility, industrial and renewables interconnection assets without bespoke retrofit.

Key features

  • Designed to IEEE C57.12.00 / C57.12.10 and IEC 60076 — interchangeable with North American and European substation standards.
  • Three-phase core-form construction with copper windings and CRGO silicon steel for low no-load loss.
  • ONAN base rating with ONAF (forced-air) upgrade typically delivering +33 % continuous capacity.
  • Hermetically sealed or conservator-tank construction; mineral oil with FR3 natural ester option for fire-safer indoor / urban siting.
  • Off-circuit DETC standard; on-load tap changer with motor drive and AVR controller available.
  • Full protection package — Buchholz / sudden-pressure relay, pressure-relief device, oil and winding-temperature indicators, dial gauges.
  • Suitable for utility substations, industrial step-down, renewables interconnection and HVAC subtransmission.

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