Earthing switches are used for ensure absolute de-energisation of high-voltage equipment in a circuit or switchgear.

   Güral EF Series Earthing Switches offer free-standing, robust and reliable solutions for high voltage earthing systems. With variations designed to serve for a wide range of system voltages, Güral EF Series Earthing Switches currently operate worldwide at system voltages from 72.5kV to 550kV.

   The flexibility of the design of Güral EF Series Earthing Switches allows almost any custom solutions requested by the client, insulation levels, driving variations and construction assembly types.

   Güral Earthing Switches can be fitted in parallel, in line or even shifted crosswise layouts.
   

   Earthing Switch consists of one or three poles. Each pole consists of a base, a fixed support insulator, one motion current carrying arm made of aluminium round tube for 72.5-170kV, one motion current carrying arm made of aluminium square tube for 245-362kV, double motion current carrying arm made of aluminium square tube for 420-550kV. Current carrying arm is connected to base by flexible copper with sufficient cross section for reliable earthing purpose.

   The base is made of two NPU profiles. All steel parts of the earthing switches are hot-dip galvanized.
   

   The earthing switches can be equipped with insulators in accordance with IEC, ANSI or DIN specifications.
   

   The earthing blade consists of an aluminium round or rectangular tube , in which the silver plated copper blade is installed.

   Folded type silver plated copper earthing contacts are fixed to the contact carrier housing. Each folded contact is provided with stainless steel flat springs to ensure reliable contact pressure.

   The contacts are self-cleaning, which makes the earthing switch suitable for installation in areas with severe climatic conditions.

   Depending on the voltage rating, anti-corona rings will be provided.
   

  The earthing switches can be single-pole or gang operated by means of a motor-operated drive mechanism or a manual-operated drive mechanism.

   In case only one drive mechanism is used for gang operation, the poles are interconnected by means of coupling rods.

   MD Series motor drives and HD series hand drives have aluminium housings and special design auxiliary switches. MD series motor drives also have manual operation by a crank.
   

   The earthing switches are designed and tested in accordance with latest IEC standards.
   

   The earthing switches are preassembled and adjusted in our workshops as complete as possible.

   The construction is designed so that all earthing switches can be installed at site very easily, without the need of any special tools. Güral provides installation instructions and assembly drawings.
   

   The earthing switches supplied by Güral are designed so as to ensure that they are maintenance free.

   However, to guarantee a long and trouble-free service period, we advise that a visual inspection of the contacts be carried out at regular intervals.