The present disclosure discloses a heat dissipation structure for a high-capacity circuit breaker, which includes: a circuit breaker body, inner heat dissipating fins, outer heat dissipating fins, and chimney cover plates; wherein the inner heat dissipating fins are disposed on an inner side of a base plate on an upper surface of a housing of the circuit breaker body, the outer heat dissipating fins are disposed on an outer side of the base plate on the upper surface of the housing of the circuit breaker body, and the outer heat dissipating fins are topped with the chimney cover plates. The inner and outer heat dissipating fins are arranged parallel to each other, are equidistantly distributed, and are perpendicular to the base plate. The chimney cover plates are made of epoxy resin and abut the top of the outer heat dissipating fins and are in parallel with the base plate.

The present disclosure provides a solid-state circuit breaker, which includes: a housing; a contact assembly; a semiconductor element, connected in series with the contact assembly; a handle; a first microswitch, capable of being triggered to generate a first signal; a second microswitch, capable of being triggered to generate a second signal; a first trigger part, coupled to the handle to move the handle; and a second trigger part, coupled to the handle to move with the handle, wherein, during a movement of the handle from the closed position to the open position, before the contact assembly is switched to the open state, the first microswitch generates the first signal, during a movement of the handle from the open position to the closed position, before the contact assembly is switched to the closed state, the second microswitch generates the second signal.

A box core module, a plug module, and a surge protective device (SPD) are provided. The plug module includes a housing, bottom plates, a plurality of box core modules with an independent tripping mechanism, a first pin electrode, and a second pin electrode. The plurality of box core modules are vertically arranged on a side of the bottom plates in a side-by-side or opposite manner, and the plurality of box core modules are connected by an internal connection electrode to form a series and/or parallel combined line. The combined line is led out through the first pin electrode and the second pin electrode. The plug module is combined with a base. A modularized multi-form assembly-type SPD is provided. Mutual conversion between a high working voltage of the SPD and a large lightning strike through-current is achieved when the same voltage-limiting element is used and an overall tripping mode remains unchanged.

A circuit breaker can include a moveable electrical contact configured to be moved between an open position and a closed position, and a lever assembly configured to prevent the progressive closing of the moveable electrical contact to the closed position such that the lever assembly is configured to cause snap action closing of the moveable electrical contact at a charged position of a motorized slider.

The present disclosure relates to an earth leakage breaker system with a leakage current limiting function, which can enhance leakage current limiting efficiency by additionally expanding areas of an input-side leakage current limiting unit and an output-side leakage current limiting unit that perform the leakage current limiting function and can ensure stable leakage current limiting operation by implementing the input-side leakage current limiting unit and the output-side leakage current limiting unit with enhanced corrosion resistance.

Example bases are described. One example base includes an insulating housing, where the insulating housing has a first surface and a second surface that are away from each other. The first surface is configured for a detachable connection of a circuit breaker. The second surface is provided with a first mounting slot. The insulation housing can be slidably snapped into a mounting rail in power distribution equipment by using the first mounting slot. An accommodating cavity is provided in the insulation housing. The accommodating cavity is configured to accommodate a conductive connection member. One end of the accommodating cavity is open along a sliding direction of the insulating housing relative to the mounting rail, and the other end thereof is closed. The base is used to install the circuit breaker.

An electric circuit breaker device includes: a housing defining an accommodating space; an igniter provided in the housing; a projectile that moves inside the accommodating space; and a conductor piece held by the housing. The conductor piece includes, between a first and second connection end portions, a cutoff portion cut by the projectile, the cutoff portion having a boundary at which the cutoff portion is cut closer to the first connection end portion is defined as a first cutting edge portion, and a boundary at which the cutoff portion is cut closer to the second connection end portion is defined as a second cutting edge portion, and a groove formed in an inner wall surface of the housing at a position corresponding to the conductor piece crossing the accommodating space and in a predetermined inter-edge inner wall region positioned between the first and second cutting edge portions.

A circuit for a circuit interrupter is provided. The circuit may in include a first SCR configured to receive a first trigger signal at a gate of the first SCR, a second SCR configured to receive a second trigger signal at a gate of the second SCR, and a third SCR configured to receive a third trigger signal at a gate of the third SCR. A cathode of the first SCR may be connected to an anode of the third SCR. A cathode of the second SCR and a cathode of the third SCR may be connected to a ground. Methods of operating a circuit interrupter and a circuit are also provided.

The present disclosure provides a circuit breaker and a battery control system including the circuit. The circuit breaker includes a frame including a lower frame and an upper frame, with an internal space being formed in the frame, a terminal portion disposed at a side of the frame to electrically connect the internal space of the frame and an exterior of the frame, and a terminal cover disposed at the side of the upper frame and covering the terminal portion.

This electrical protection device (300) is configured to be reversibly mounted on a distribution device (110) comprising a power bus (124). The device for protecting the incoming terminals (302), connectable to the power bus, and a switching mechanism (310) with a movable contact (370) and a tripping device (372). The protection device comprises a safety mechanism (500), which comprises a support portion (502), which is movable and which is configured to be pushed back, against a return member (504), into a retracted position when the protection device is mounted on the distribution device. When the protection device is dismantled, the support portion moves and the safety device activates the tripping device (372), causing the switching mechanism to switch to an isolation configuration before each incoming terminal is disconnected from the power bus.