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Earthing switches |
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Type EF |
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rated voltage [kV] |
72.5 - 420 |
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rated short-time current 3s [kA] |
up to 63 |
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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.
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Advantages |
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More than 70 years experience |
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Durable and reliable design |
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Pre-assembled and adjusted in our
works for quick installation |
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Easy installation and adjustment
at site without special tools |
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Suitable for installation in
areas with severe climatic conditions |
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Virtually maintenance free |
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Long service life |
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Technical Features |
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Modular construction with
interchangeable parts |
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Special earthing contact on top of
the insulator |
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Earthing blade made out of an aluminium
tube |
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Silver-plated copper contacts |
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Self-cleansing contacts |
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Hot-dip galvanized steel parts |
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