A contactor assembly is connected to a bus-bar of a main circuit-breaker. The assembly includes a housing including an opening defined therein; a contactor passing through the opening, wherein the contractor includes contacting portions projecting forwardly of the opening and coupled portions projecting rearwardly of the opening; a presser passing through the opening, wherein the presser is interposed between the contactor and the housing, wherein the presser is supported on the housing and presses the contacting portions and the coupled portions; and a connector coupled to the coupled portions of the contactor and electrically connected to the contactor.

The present application provides a residual-current protection device and a tripper. The residual-current protection device comprises: a flux transformer receiving a residual-current signal; a tripping output element outputting ON/OFF signals; an energy storage mechanism adapted to switch between an energy storage state and an energy release state, the energy storage mechanism having a locking unit that locks the energy storage mechanism in the energy storage state; and a transmission mechanism braked by the flux transformer, which drives the tripping output element to move and drives state of the energy storage mechanism to switch; the transmission mechanism comprising: a first rack cooperating with the locking unit, a second rack driving the tripping output element, and a reduction gear with a big gear engaged with the first rack and a small gear engaged with the second rack. By means of the gear rack transmission mechanism of the residual-current protection device, reduction transmission can be effected, driving force needed by energy storage may be reduced, and thus design requirements as high transmission efficiency, easy processing and assembly as well as low costs can be satisfied.

An unit has a plurality of arc quenching plates and an electrically isolative housing, the plurality of arc quenching plates adjacent to each other are spaced to form an arc channel. Each one of the plurality of arc quenching plates has a mounting portion and a receiving portion, the receiving portion has a distributing part, the distributing part has a through hole penetrating through the receiving portion and an inclined plane protruding from the receiving portion, the inclined plane is arranged to a side of the through hole away from an arc entrance and extending to the arc entrance, an angle between the inclined plane and the receiving portion is an acute angle, a root of the inclined plane is continuous with the receiving portion. An inclined plane of a first arc quenching plate is interlacing and opposite with an inclined plane of a second arc quenching plate.

An electrical switching apparatus includes a first pole unit, a second pole unit, and a busbar assembly interconnecting the first pole unit with the second pole unit in series or in parallel. A first mechanism is configured to switch the first pole unit between its open and closed conditions. A second mechanism is configured to switch the second pole unit between its open and closed conditions. An actuating assembly is configured to actuate the first and second mechanisms to switch the first and second pole units from their open conditions to their closed conditions simultaneously, and to switch the first and second pole units from their closed conditions to their open conditions simultaneously.

A locking module of an arming system including accumulation device, the module including a lever, second end including a bearing surface, the accumulation device exerting a thrust force on the first end when it is in the armed state; a lock element intended to adopt a first position to oppose the thrust force and a second position to stop opposing the thrust force; the module being characterized in that a shoe fixed to the lever is interposed between the bearing surface and the contact surface when the bearing surface is bearing against the contact surface, the width of the surface of the shoe in contact with the contact surface being greater than the width of the bearing surface.

The invention relates to an arc quenching plate for quenching arcs. The arc quenching plate comprises a mounting portion suitable for mounting and a receiving portion suitable for receiving arcs, the receiving portion comprises a distributing part suitable for separating arcs, the distributing part comprises a through hole penetrating through the receiving portion and an inclined plane protruding from the receiving portion, the inclined plane is arranged to a side of the through hole away from an arc entrance and extending to the arc entrance, an angle between the inclined plane and the receiving portion is an acute angle, a root of the inclined plane is continuous with the receiving portion. The arc quenching plate and the arc quenching unit of the present invention have following benefit, in the same space, an arc can be separated into much more pieces of short arc.

A locking mechanism for a circuit breaker operation device includes a housing (1). A button (2) is mounted in a button slot (101) of the housing (1). The locking mechanism is characterized in that the housing (1) is provided with a locking member (3) therein, and the locking member (3) can lock or unlock the button (2). In the locking mechanism for a circuit breaker operation device, a locking member is added in the circuit breaker; only after a lock button is pressed, an operation button is pressed to close the circuit breaker; when the operation button is pulled out, the circuit breaker is disconnected; when the lock button is not pressed, the operation button is locked by the lock button, the operation button cannot be pressed down, the circuit breaker cannot be closed.

Implementations of the subject matter described herein provide a switching apparatus. The switching apparatus includes: a switching component including a first main shaft, which is adapted to selectively connect and disconnect at least one circuit in response to the rotation of the first main shaft; and an operating mechanism including a second main shaft for actuating the first main shaft to rotate via the second main shaft; wherein the switching component further includes a first interface, and the operating mechanism further includes a second interface, and the second main shaft to be detachably coupled to the first main shaft in response to the engagement of the first interface and the second interface.

Motor control centers have units or buckets with an extendable/retractable power connection (stab) assembly and one or more operating lever interlocks that include a unit latch to latch to a cabinet and a power connection position interlock that blocks the handles of the units or buckets based on position of the power connection assembly, optionally also including a shutter cam that slides a shutter right and left.

An electrical switching apparatus includes a first pole unit, a second pole unit, and a busbar assembly interconnecting the first pole unit with the second pole unit in series or in parallel. A first mechanism is configured to switch the first pole unit between its open and closed conditions. A second mechanism is configured to switch the second pole unit between its open and closed conditions. An actuating assembly is configured to actuate the first and second mechanisms to switch the first and second pole units from their open conditions to their closed conditions simultaneously, and to switch the first and second pole units from their closed conditions to their open conditions simultaneously.