Underground Buried Transformer, 12 kV (Um 12 kV), 100–1250 kVA — DMB-12

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Box-Type Substations
100 – 1250 kVA12 kV / 0.4 kV

Where surface space simply does not exist, the transformer goes below it. The DMB-12 is built for direct burial in a sealed concrete chamber: the tank, HV connections and cooling path are protected against ground water and soil load, while the LV cabinet remains at grade for operation and maintenance. Typical applications are city squares, boulevards and historic districts where nothing may be seen.

Model / SeriesDMB-12/0.4
Rated Capacity100 – 1250 kVA
Voltage Level12 kV / 0.4 kV
Um (IEC 60071-1)12 kV
PhaseThree-phase
Cooling MethodONAN (buried, natural)
Executive StandardIEC 60076
  • Transformer installed below grade
  • Only the LV cabinet visible at ground level
  • Corrosion-protected tank and chamber
  • Watertight cable entries
  • Frees surface space in dense districts

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