Earthing Transformers

EARTHING Transformers

Getra, in its plant in Pignataro Maggiore, is able to design, manufacture and test Earthing Transformers with insulation class up to 36kV and earth fault current up to 1000A to satisfy any electrical and mechanical customer needs.

The Earthing Transformers is a special electrical equipment that physically creates the star center of the MV system to connect it to ground directly or through an appropriate impedance (Petersen coil). The structure of the Earthing Transformers is similar to a three-phase transformer in which two identical and concentric windings, instead of being galvanically separated to form primary and secondary, are connected to each other in the typical zig-zag connection, i.e. two windings, a zig and a zag , of cyclically successive columns are connected in opposite series forming a phase; the three phases are star connected. If required, the Earthing Transformers can be equipped with an auxiliary low voltage winding to power any loads present in the substations.

Earthing in electrical power systems plays a very important role as reliability, the ability to withstand fault currents and overvoltages depend on the characteristics of the neutral earthing. The main applications of Earthing Transformers are:

  • Earthing the electrical system
  • Limit the magnitudes of transient overvoltages when restriking earth faults occur
  • Limit the current line to earth faults
  • In phase-to-ground faults, limit the current value
  • Allow the circulation of unbalanced load current in the neutral
  • Allow the connection of phase to neutral loads when desired

Technical features of the product

  • Voltage: up to 36kV
  • Earth currents: up to 1.000A

Contact our team

Select the product and country to find out which manager to contact
Team Getra
Getra | Francesca Pelizzola - Sales Manager (Italia)

Francesca Pelizzola


T +39 333 3179312

Getra | Ciro Sannino - Sales Manager (Spagna, Sud America e Usa)

Ciro Sannino

SALES MANAGER (Spagna, Sud America and Usa)

T +39 345 7631542

Getra | Francesco D’Alessio - Sales Business Development (Est Europa e Nord America)

Francesco D’Alessio

SALES BUSINESS DEVELOPMENT (Est Europa and Nord America)

T +39 335 8002718

Getra | Nunziato D'Ambrosio - Sales Manager (Nord Europa e Middle East)

Nunziato D'Ambrosio

SALES MANAGER (Nord Europa and Middle East)

T +39 348 1225578

Getra | Vincenzo Iula - Sales Manager (Germania, Austria e Svizzera)

Vincenzo Iula

SALES MANAGER (Germania, Austria and Svizzera)

T +39 348 4217986

Getra | Contatta il nostro Team


Contact the sales office at the following addresses

T +39 0823 581711



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