Siemens Aktiengesellschaft

Martin Böttcher

Ludvik Godesa

Karl-Heinz Manthe

Marcus Kampf

Sezai Türkmen

Karsten Freundt

Werner Troebel

Frank Graskowski

Stefan Lecheler

Werner Schmidt

Ulf Schümann

Gernot Swiatkowski

Philipp Last

Gunter Seidler-Stahl

Jörg Teichmann

Maximilian Sieting

Christoph Luft

Dorothea Pohlmann

Christian Heinrichs

Ulf Schumann

A drive, for a switching device including a contact system with a fixed and a moving contact, including an actuator for operating the moving contact for closing or opening the contact system, and also a mechanical transmission device arranged between the moving contact and the actuator. The transmission device includes a toggle joint mechanism formed by a folding lever, pivotable about a stationary bearing, and a coupling element, connected to the folding lever via a moving bearing. The toggle joint mechanism is pivotable between a first end position and a second end position. When the changeover is made from the first to the second end position or vice versa, a maximum extended position occurs. The coupling element holds the moving contact in that position which closes the contact system in the first end position and in that position in which the contact system is open in the second end position.

Drive for a switching device

A vacuum interrupter has a housing with at least a first metal flange through which a first connection pin extends into the vacuum interrupter in a vacuum-tight manner to a first contact. The housing has at least one insulating-material housing region formed by a disc-like insulator. A second connection pin extends into the vacuum interrupter in a vacuum-tight manner to a second contact. The vacuum interrupter can be produced in a cost-effective manner with a compact construction. There is also described a switch pole for a switching device having a vacuum interrupter.

Vacuum interrupter and switch pole

An electromagnetic drive for an electrical switch such as a circuit breaker, has at least one movable armature that can implement a lifting movement along a pushing direction for moving a movable switching contact of the switch. In a closed armature position, the armature closes a magnetic circuit through first and second magnetically conductive yoke parts. A permanent magnet produces a magnetic field for the magnetic circuit and a holding force for holding the armature in the closed position. A coil is disposed to generate a magnetic flux in the same or opposite direction as the magnetic flux of the permanent magnet. The electromagnetic drive can be readjusted after installation, where the first and second yoke parts are moved relative to one another by the permanent magnet into the adjusted state, whereupon they are fixed in position.

Electromagnetic drive

A modular cost-effective drive system for electrical switching devices of medium-voltage installations is specified. The drive system, by the addition or omission of individual components, can be used both as a three-position disconnector with a snap-action or storage drive function and as a two-position circuit breaker which can also be expanded by a brief interruption function.

Drive system for electrical switching devices

Low-voltage power switch with a switching chamber

Arc chute having three barriers for the passage of arc gasses

A low-voltage circuit breaker has a locking lever to prevent transfer of the circuit breaker handle entirely into its 'off' position if the movable contact is blocked in its 'on' position by being welded to the fixed contact. The locking lever is rotatably mounted on the control shaft, which is pivotally moved by a drive lever which is connected to the control shaft by a toggle lever system including two toggle levers and a toggle hinge pin joining them together. The fork arms embrace a working surface on the drive lever and the toggle hinge pin. The working surface and the hinge pin are spaced closer together than the arms when the circuit breaker handle is in its 'on' position to allow only partial movement of the handle toward its 'off' position unless the movable contact is free to move to its 'off' position before the locking lever pivots to a position in which it engages both the working surface and the toggle hinge pin. The locking lever can be formed as a double lever with a connecting web.

Low-voltage protective circuit breaker with a forked locking lever

Growing community of inventors

Berlin, Germany

Martin Böttcher