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Earthing switches
rote Linie

Type EF  
  rated voltage [kV] 72.5 - 420
  rated short-time current 3s [kA] up to 63

Earthing switches type EF consists of three single poles. They are free-standing or built-on to disconnectors on to the right hand side and/or to the left hand side. Each free-standing pole consists of a frame, a support insulator with earthing contact on top and a blade moving vertically made out of an aluminium tube with silver-plated contacts at both ends.

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

Earthing switches are operated single-pole or three-pole by means of a motor or manual operated drive mechanism inside an IP54 housing, with torques up 850Nm and including up to 10 auxiliary contacts for position indication.

The earthing switches are designed and tested in accordance with IEC129:1984.


More than 70 years experience

Durable and reliable design

Pre-assembled and adjusted in our works for quick installation

Easy installation and adjustment at site without special tools
Suitable for installation in areas with severe climatic conditions
Virtually maintenance free
Long service life

Some Technical Features
Modular construction with interchangeable parts
Special earthing contact on top of the insulator
Earthing blade made out of an aluminium tube
Silver-plated copper contacts
Self-cleansing contacts
Hot-dip galvanized steel parts

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