BREMER Transformer Series

At BREMER Transformatoren GmbH, we name our mains frequency series based on the standardized core laminations used, adhering to the traditions of our industry. The core laminations are designated as EI, UI, or 3UI, reflecting their external shapes.

Single-phase transformers up to about 650VA are available in various EI series.
Single-phase transformers ranging from 150VA to about 20kVA belong to the UI series.
Single-phase transformers above 20 to about 100kVA are categorized as ETN series, with their cores based on an in-house standard.

Three-phase transformers from 60VA to approx. 25kVA are called 3UI type series.
Three-phase transformers from 25 to max 180kVA are the DTN type series, these cores also originate from their own in-house standard.

Mains frequency PCB transformers are EE and EI types (EE20 … EI66).
The so-called PCB flat transformers are called UI30 and UI39, as three-phase 3UI30 and 3UI39.

Product families of transformers, transformers and inductors for higher frequencies made of ferrite and other materials in all common forms from E to RM cores, we name as the core manufacturers do.

High-voltage and other special transformers have their own names.
You can find more information about core sheets in our flyer BREMER+GERTH_Kerne.pdf under Downloads.