A heat destructive disconnecting switch, comprises a first conductive member, a second conductive member, a movable conductive member, an overheating destructive member, an operating component, and a second elastic member. The movable conductive member conducts electricity to the first conductive member and the second conductive member. A first elastic member and the second elastic member act on an operating member. The first elastic member is compressed and provided with a first elastic force, and the second elastic member is provided with a second elastic force. When the overheating destructive member is destructed due to overheating, the first elastic force is diminished or vanishes, causing the second elastic force to be larger than the first elastic force. Consequently, the movable conductive member disconnects the current conducting state between the first conductive member and the second conductive member, thereby achieving a protective effect from overheating.

A heat destructive disconnecting switch, comprises a first conductive member, a second conductive member, a movable conductive member, an overheating destructive member, an operating component, and a second elastic member. The movable conductive member conducts electricity to the first conductive member and the second conductive member. A first elastic member and the second elastic member act on an operating member. The first elastic member is compressed and provided with a first elastic force, and the second elastic member is provided with a second elastic force. When the overheating destructive member is destructed due to overheating, the first elastic force is diminished or vanishes, causing the second elastic force to be larger than the first elastic force. Consequently, the movable conductive member disconnects the current conducting state between the first conductive member and the second conductive member, thereby achieving a protective effect from overheating.

A dual conductor Thomson coil actuator for use in opening the separable contacts of a circuit interrupter comprises two nested conductors wound to form a single coil, rather than the traditional design comprising one single conductor wound to form a coil of the same size. Each of the two conductors can be excited by half the capacitance that would be used to excite the traditional single conductor coil, using the same voltage as the single conductor coil. When the same total capacitor-stored energy that would be used to excite the single conductor coil is instead used to excite the dual conductor coil, the initial pulse of aggregate current through the dual conductor coil is greater than the initial pulse of current through the single conductor coil, resulting in a faster initial opening distance of the separable contacts during an opening stroke.

A dual conductor Thomson coil actuator for use in opening the separable contacts of a circuit interrupter comprises two nested conductors wound to form a single coil, rather than the traditional design comprising one single conductor wound to form a coil of the same size. Each of the two conductors can be excited by half the capacitance that would be used to excite the traditional single conductor coil, using the same voltage as the single conductor coil. When the same total capacitor-stored energy that would be used to excite the single conductor coil is instead used to excite the dual conductor coil, the initial pulse of aggregate current through the dual conductor coil is greater than the initial pulse of current through the single conductor coil, resulting in a faster initial opening distance of the separable contacts during an opening stroke.

An electrical switch for an electric power tool. The electrical switch has a contact system that can be switched between an off position and an on position, and having a movable actuating means or switching the contact system. The actuating means comprises a plunger and a contact piece. The contact piece acts on the contact system for the purpose of switching. A coupling element is provided, such that the plunger can be brought into and out of interaction with the contact piece. The interaction is effected such that it is made possible for the contact system to be switched into the on position and the off position by means of the plunger, and for the contact system to be switched into the off position independently of the plunger.

This invention relates to a switching device (10). More specifically, the invention relates to a retrofit switching device (10) for mechanically switching a plurality of switches between on and/or off conditions. It is envisaged that the primary application of such invention is for switching circuit breakers configured along one or more rows on a distribution board. The switching device (10) includes a pair of primary parallel guide rails (12,14), a means for anchoring the switching device (10) to a switch covering panel (i.e. a distribution board panel) and a carriage (22), supported across the primary parallel guide rails (12,14) and movable back-and-forth therealong along a first axis, the carriage (22) comprising thereon: (i) a switch engaging formation for operably switching the switches between on and off conditions; and (ii) a primary drive (26) for moving the switch engaging formation back-and-forth along a second axis, wherein the first and second axes are transverse one another. The switching device (10) further includes a secondary drive (28) for moving the carriage along the primary parallel guide rails (12, 14) and operably along the one or more rows of switches, a controller for at least actuating the primary (26) and the secondary drives (28), and a power source for powering at least the primary drive (26), the secondary drive (28) and the controller.

This invention relates to a switching device (10). More specifically, the invention relates to a retrofit switching device (10) for mechanically switching a plurality of switches between on and/or off conditions. It is envisaged that the primary application of such invention is for switching circuit breakers configured along one or more rows on a distribution board. The switching device (10) includes a pair of primary parallel guide rails (12,14), a means for anchoring the switching device (10) to a switch covering panel (i.e. a distribution board panel) and a carriage (22), supported across the primary parallel guide rails (12,14) and movable back-and-forth therealong along a first axis, the carriage (22) comprising thereon: (i) a switch engaging formation for operably switching the switches between on and off conditions; and (ii) a primary drive (26) for moving the switch engaging formation back-and-forth along a second axis, wherein the first and second axes are transverse one another. The switching device (10) further includes a secondary drive (28) for moving the carriage along the primary parallel guide rails (12, 14) and operably along the one or more rows of switches, a controller for at least actuating the primary (26) and the secondary drives (28), and a power source for powering at least the primary drive (26), the secondary drive (28) and the controller.

A holding adapter for fixing control and signaling devices, including pushbuttons, on a front plate, includes: a housing having a first recess; and a mounting plate mounted in the housing and having a second recess. The second recess is arranged flush with the first recess so that a control or signaling device is guidable in an axial direction through the two recesses. The mounting plate is displaceable in the axial direction relative to the housing between a first end position and a second end position so as to provide a vertical compensation when the control or signaling device is fixed to the front plate, depending upon a thickness of the front plate.

A holding adapter for fixing control and signaling devices, including pushbuttons, on a front plate, includes: a housing having a first recess; and a mounting plate mounted in the housing and having a second recess. The second recess is arranged flush with the first recess so that a control or signaling device is guidable in an axial direction through the two recesses. The mounting plate is displaceable in the axial direction relative to the housing between a first end position and a second end position so as to provide a vertical compensation when the control or signaling device is fixed to the front plate, depending upon a thickness of the front plate.

A control device for commercially available high voltage capacitor switches to close the circuit on electric utility power factor correction shunt capacitors or motor start assistance shunt capacitors precisely as each phase of the AC power source passes through zero volts.