Electromagnetic switching device
AssigneeSiemens Aktiengesellschaft
InventorsKarl-Hans Bärnklau, Johann Drexler, Peter Hartinger, Gerhard Wössner
Life of this patent
Estimating the term…
Abstract
An electromagnetic switching device includes an electromagnetic drive device and at least one electrical contact that, when a starting current is applied to the drive device, can be transferred by the drive device from a disconnect position (contact opened) into a bridging position (contact closed). When the switching device is fully installed, the contact can be blocked in the disconnect position and can be mechanically blocked in the disconnect position by an arresting element that can be connected to the switching device. As a result, the contact remains in the disconnect position even when the starting current is applied to the drive device.
Claims15
An electromagnetic switching device, comprising:
- an electromagnetic drive apparatus;
- at least one electrical contact, the contact being movable via a contact link support from a disconnected position to a bridging position by the electromagnetic drive apparatus when a pull-in current is applied to the electromagnetic drive apparatus, the contact being closed in the bridging position and being open in the disconnected position;
- a basic appliance;
- and
- an additional appliance, connected to the basic appliance, the contact link support and the at least one contact being arranged in the basic appliance, the additional appliance including,
- an extension, connected to the contact link support in such a way that the extension is positively guided by the contact link support, the extension being mechanically blockable by use of a locking element, connectable to the additional appliance and blockable in the disconnected position of the contact, such that the extension, the contact link support and the contact are locked in the disconnected position, even when the pull-in current is applied to the electromagnetic drive apparatus.
An additional appliance for an electromagnetic switching device, said additional appliance being connectable to a basic appliance of the electromagnetic switching device, wherein:
- said basic appliance has an electromagnetic drive apparatus and a contact link support;
- said contact link support is movable from a first position to a second position by applying a pull-in current to the electromagnetic drive apparatus;
- said additional appliance has an extension which is connectable to the contact link support of the basic appliance in such a way that the extension is positively guided by the contact link support;
- said extension is mechanically blockable by a locking element that is insertable into the additional appliance when said contact link support is in the first position;
- and
- said contact link support remains in the first position even when the pull-in current is applied to the electromagnetic drive apparatus when the locking element is inserted into the additional appliance.
Dependencies are inferred from the claim text.