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US 2008/0117006 A1Published application
Switching Equipment Comprising a Thermal and Electromagnetic Trip Device
OwnerPatrick Claeys, Albrecht Vogelinventors
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OwnerPatrick Claeys, Albrecht Vogelinventors
Estimating the term…
A switching device has a housing and at least one contact point, which comprises a fixed contact piece and a moveable contact piece, and having a thermal and magnetic release, which comprises a tripping coil and a tripping armature. The tripping armature comprises at least two operatively connected tripping armature parts. The first tripping armature part is formed from a first material having a magnetic shape memory effect. The second tripping armature part is formed from a bimetallic strip or from a material having a thermal shape memory effect or from a material having a combined thermal and magnetic shape memory effect. The tripping armature, both under the influence of the magnetic field of the tripping coil in the event of a short-circuit current and under the influence of an increase in temperature brought about by overcurrent, can be deformed and, as a result, the contact point can be caused to open. Uses of a material having a magnetic shape memory effect in a thermal and electromagnetic release are also disclosed.
A switching device having a housing and having at least one contact point, which comprises a fixed contact piece and a moveable contact piece, and having a thermal and magnetic release, which comprises a tripping coil and a tripping armature, characterized in that wherein the tripping armature comprises at least two operatively connected tripping armature parts, and the first tripping armature part is formed from a first material having a magnetic shape memory effect, and the second tripping armature part is formed from a bimetallic strip or from a material having a thermal shape memory effect or from a material having a combined thermal and magnetic shape memory effect, the tripping armature, both under the influence of the magnetic field of the tripping coil in the event of a short-circuit current and under the influence of an increase in temperature brought about by overcurrent, being deformed and, as a result, the contact point being caused to open.
The use of a material having a magnetic shape memory effect in a thermal and electromagnetic release, which comprises a tripping coil and a tripping armature, which comprises two operatively connected tripping armature parts, for a switching device, wherein a first tripping armature part of the release is formed from the material having the magnetic shape memory effect, and a second tripping armature part is formed from a bimetallic strip or from a material having a thermal shape memory effect or from a material having a combined thermal and magnetic shape memory effect, the tripping armature, both under the influence of the magnetic field of the tripping coil in the event of a short-circuit current and under the influence of an increase in temperature brought about by overcurrent, being deformed and, as a result, the contact point being caused to open.
The use of a material having a magnetic shape memory effect for short-circuit current and overcurrent tripping in a switching device comprising a tripping coil and a thermal and electromagnetic release, wherein a first tripping armature part of the tripping armature, which comprises two operatively connected tripping armature parts, is formed from the material having the magnetic shape memory effect, and a second tripping armature part of the tripping armature, which comprises two operatively connected tripping armature parts, is formed from a bimetallic strip or from a material having a thermal shape memory effect or from a material having a combined thermal and magnetic shape memory effect, the tripping armature, both under the influence of the magnetic field of the tripping coil in the event of a short-circuit current and under the influence of an increase in temperature brought about by overcurrent, being deformed and, as a result, the contact point being caused to open.
A thermal and magnetic release arrangement for a switching device, the release arrangement comprising:
Dependencies are inferred from the claim text.