Surge arrester

Patent metadata

Field	Value
Publication number	US-9306385-B2
Application number	US-201214363818-A
Country	US
Kind code	B2
Filing date	Nov 9, 2012
Priority date	Dec 9, 2011
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

A surge arrester has a tube-shaped housing, an end fitting connected to an end of the housing, a varistor block arranged in the housing and a supporting element arranged in the region of the end fitting. The supporting element has a supporting ring which is in contact with the housing and which includes a cone and a clamping ring with a counter-cone that corresponds to the cone. The cone is braced to the counter-cone in such a manner that the supporting ring is pressed to the housing in a non-displaceable manner. The supporting element can thus also be used after the installation of the varistor block and also be removed.

First claim

The invention claimed is:

1. A surge arrester, comprising:
a tubular housing having an end;
an end fitting connected to said end of said housing;
a varistor block disposed in said housing; and
a supporting element disposed in a region of said end fitting, said supporting element having:
a supporting ring resting on said housing and including a first cone;
a first clamping ring including a first opposing cone associated with said first cone;
wherein said first cone is clamped with said first opposing cone such that said supporting ring is pressed immovably against said housing.

2. The surge arrester according to claim 1 , wherein said supporting ring rests on an inner wall surface of said housing.

3. The surge arrester according to claim 1 , wherein said supporting ring has a second cone formed with an incline opposite to an incline of said first cone, and said supporting element has a second clamping ring formed with a second opposing cone associated with said second cone.

4. The surge arrester according to claim 3 , wherein said supporting ring, said first clamping ring, and said second clamping ring are arranged coaxially with respect to a tube axis of said housing and are movable relative to one another along said tube axis so as to selectively produce or release a clamping effect.

5. The surge arrester according to claim 1 , wherein said supporting ring and said first clamping ring are arranged coaxially with respect to a tube axis of said housing and are movable relative to one another along said tube axis so as to selectively produce or release a clamping effect.

6. The surge arrester according to claim 1 , which further comprises adjustment means connecting said supporting ring and said first clamping ring or said first and second clamping rings to one another, wherein a movement required in order to produce or release a clamping effect is adjustable by way of said adjustment means.

Assignees

• Siemens Ag

Inventors

• Gottschalk Ingo
• Pippert Erhard
• Springborn Dirk
• Sulitze Markus

Classifications

• H01C7/12 Primary

  Overvoltage protection resistors; Arresters · CPC title

• H02H1/043

  to inrush currents (H02H1/046 takes precedence; differential protection of transformers H02H7/045) · CPC title

• H02H9/001 Primary

  limiting speed of change of electric quantities, e.g. soft switching on or off (progressive control of electronic switches for eliminating interferences H03K17/16) · CPC title