A switch assembly adapted and a method for switching power to a circuit having a power source. The switch assembly includes current carrying contacts and a coupling member. The coupling member has conductive pads for engaging the current carrying contacts and a contact bridge extending between the conductive pads. An actuator assembly moves the coupling member between a closed position in which the conductive pads of the coupling member engage the current carrying contacts and an open position in which the conductive pads of the coupling member are disengaged from the current carrying contacts. Opposing electromagnetic forces are generated between the contact bridge and the conductive pads to resist electromagnetic repulsion forces generated between the current carrying contacts and the conductive pads as the actuator assembly approaches or is in the closed position.

An electromagnetic contactor includes: a lower frame having an accommodation space therein; a bobbin having a fixed core, and accommodated in the lower frame; a movable core inserted into the bobbin so as to be moveable up and down; a spring installed between the bobbin and the movable core, and configured to provide an upward restoration force to the movable core; and a b contact switch installed at one side of the bobbin, wherein a button for operating a switch lever of the b contact switch is provided at a movable core plate positioned above the movable core.

A switch capable of withstanding short-circuit currents without being destroyed or deteriorated by the passage of such high currents includes at least one fixed contact and at least one movable contact, wherein the movable contact is displaceable between a closed position of the switch in which the fixed and the movable contacts are electrically connected, and an open position of the switch in which the fixed and movable contacts are separated. The switch includes at least one equipotential connecting member electrically connecting the fixed contact and the movable contact in the closed position of the switch, such that the fixed and the movable contacts are at the same electric potential, and wherein at least a part of the equipotential connecting member is pressed against the fixed contact and/or the movable contact in the closed position of the switch.

Systems, devices and methods for the management of glucose levels in the body of patient featuring user interface input mechanisms configured to provide haptic feedback to the user are provided.

One variation of a keyboard system includes: a substrate including an array of inductors; a tactile layer arranged over the substrate defining an array of key locations over the array of inductors; an array of magnetic elements, each arranged within the tactile layer at a key location configured to inductively couple to an adjacent inductor and configured to move relative to the adjacent inductor responsive to application of a force on the tactile layer at the key location; and a controller configured to read electrical values from the inductors. In response to detecting a change in electrical value at a first inductor, the controller also configured to: register a first keystroke of a first key type associated with a first key location defined over the first inductor; and drive an oscillating voltage across the first inductor to oscillate the tactile layer over the substrate during a haptic feedback cycle.

A circuit breaker protects an electric low-voltage circuit, having: a housing with grid-side connections and load-side connections for the low-voltage circuit; and a mechanical separating contact unit connected to an electronic interruption unit in series. The mechanical separating contact unit is paired with the load-side connections, and the electronic interruption unit is paired with the grid-side connections. The mechanical separating contact unit is switched by opening contacts to prevent a current flow or by closing the contacts for a current flow in the low-voltage circuit. Semiconductor-based switch elements of the electronic interruption unit are switched to a high-ohmic state to prevent a current flow or to a low-ohmic state for a current flow in the low-voltage circuit. A current sensor ascertains the level of the current of the low-voltage circuit and a controller is connected to the current sensor, the mechanical separating contact unit, and the electronic interruption unit.