Transformers
From cast-resin and oil-immersed distribution transformers through medium and large power transformers to shunt reactors, rail and phase-shifting applications — loss-optimized designs per IEC 60076 with digital monitoring provisions.
Browse transformers
Distribution transformers
Fluid-immersed FITformer® and GEAFOL cast-resin distribution transformers, from 50 kVA compact units to 50 MVA dry-type designs.
DT-CRDT-OFIT StandardGEAFOL neo4 products →
Power transformers & reactors
Medium and large power transformers, generator step-up units, and shunt reactors for transmission and generation applications.
LPT-GSUMPTSR3 products →
Special transformers
Phase-shifting and rail traction applications.
PSTTRAC2 products →
Featured products
Most-documented entries in this area — full specifications, downloads and orderable designations.
DT-CR GEAFOL cast-resin distribution transformer, ≤ 50 MVA
≤ 50 MVA · ≤ 52 kV · IEC 60076-11 dry-type Datasheet · Dimensions ↓ DT-O Oil-immersed distribution transformer, ≤ 5 MVA
50 kVA – 5 MVA · ≤ 36 kV · 50 / 60 Hz Datasheet · Dimensions ↓ PST Phase-shifting transformer
≤ 2,000 MVA · ≤ 765 kV (1-ph) · single- & two-core designs Datasheet · Dimensions ↓ TRAC Tractronic® on-board traction transformer
Up to 15 MVA (higher on request) · 1.5 / 3 kV DC · 11.5 / 15 / 25 kV AC · 16⅔ – 60 Hz, single- or multi-system Datasheet · Dimensions ↓How to choose a transformer
Rating, voltage class and installation environment select the family: dry-type cast-resin where fire safety and indoor installation dominate, oil-immersed for efficiency and overload headroom, and engineered power classes upward of 200 MVA for grid and generator step-up duty.
- Indoor/fire-critical distribution → GEAFOL cast-resin (E2/C3/F1)
- Network distribution → oil-immersed FITformer range
- Grid coupling, GSU, HVDC and load-flow control → power classes, PST
- Reactive power management → shunt reactors
Official brochures — current online editions
Mirrored from the published marketing literature on siemens-energy.com; source links included.
Technical documentation
10 documents available across this area — datasheets, catalogs and drawings.
Manual GEAFOL / CARECO cast-resin transformer — operating instructions (Edition 04/2025) Catalog The GEAFOL Neo — convincing technology creates compact performance: construction, ordering data Tier 1/Tier 2, truck and terminal dimensions, standard housings (04/2021) Brochure GEAFOL Cast-Resin Transformers — product overview (02/2021) Fact sheet SITRAM H2Guard Lite — online hydrogen monitoring for liquid-filled transformersOwn or operate this equipment?
Related services: maintenance & repairs · how to obtain spare parts. Registered customers see their installed base, quotations and spare-part workflows next to these same product pages.