Oil-Immersed
Power Transformers.
34.5 kV through 765 kV, ratings up to 800 MVA — designed to IEEE C57 for the US grid. Delivered in 5 to 10 months, against current OEM backlogs of 18 to 36.
Six transformer families,
one production line.
Step-up GSU, step-down station, autotransformers, phase-shifters, EAF, traction — manufactured at Baku Industrial Complex and the new ATEF-Ukraine facility in Hust.
Step-up GSU
Generator step-up transformers for thermal, hydro, and renewables — typically 230 to 500 kV.
Step-down station
Transmission-to-distribution station transformers for utility and large industrial substations.
Autotransformers
Interconnecting transmission autotransformers — 345/230 kV, 500/345 kV, 765/500 kV ties.
Phase-shifting
Phase-shifting transformers for power flow control on heavily loaded transmission paths.
Electric arc furnace
EAF transformers for steel production — high-current, high-duty, harmonic-tolerant designs.
Traction
Traction transformers for rail electrification and high-speed transit feeder substations.
Annual production,
by voltage class.
Combined Baku + ATEF-Ukraine capacity at full ramp-up. Higher kV classes consume more factory time per unit — the volume mix shifts toward distribution at lower classes.
Core to test bay,
under one roof.
GEORG core lines, vertical winding machines, vapor-phase drying, HighVolt + OMICRON test bay with Faraday-cage shielded room — operations competitors typically distribute across external suppliers.
Core processing
- GEORG + SAGMA automatic core cutting lines
- STEP-LAP construction, grain-oriented steel from 0.18 mm
- Hydraulic-adjustable assembly tables, banding machines
Winding
- Vertical and horizontal winding machines
- Single coil capacity up to 30 tons
- CTC support for low-loss high-current designs
Active part
- Vapor-phase drying in solvent vapor environment
- Active part assembly under controlled humidity
- Combined drying and pressing furnaces, vacuum extraction
Testing center
- HighVolt HV test sets, OMICRON measurement
- Faraday-cage shielded room, PD ≤5 pC
- Oil and insulation chemical analysis lab
2 – 3× faster
than US OEM backlog.
Major US OEMs currently quote 18 to 36 months for new orders. ATEF Group's manufacturing capacity is available now — production slots open across all voltage classes.
Designed to IEEE C57.
Tested by KEMA and CESI.
Third-party type-test reports on existing serial production from KEMA (Netherlands) and CESI (Italy). Project-specific IEEE C57.12.90 reports issued under each US contract.
IEC 60076 type-test reports on serial production.
Short-circuit and dielectric type tests.
From the same line.
Reactors and substation equipment are built on the same factory floor, by the same engineering team, under the same quality system.
Reactors
Shunt, current-limiting, noise-suppression. Oil-immersed or dry-type. Same HV test lab as power transformers.
View reactors →Distribution
Pad-mount, substation-type, pole-type. 100 kVA – 5,000 kVA. 5,000+ units/year combined capacity.
View distribution →Substation integration
Coordinated HV equipment scope as a single-contract package — transformers, reactors, instrument transformers.
View integration scope →Have an SLD
or a load list?
Send specifications, a single-line diagram, or a draft RFQ. Our US-based engineering team confirms voltage class, sizing, and lead time within one business day.