A circuit breaker device or circuit breaker system may include a series connection of a semiconductor switch and an isolating contact system, for a low voltage electrical circuit, in which the magnitude of the current is determined.

A circuit breaker device or circuit breaker system may include a series connection of a semiconductor switch and an isolating contact system, for a low voltage electrical circuit, in which the magnitude of the current is determined.

A circuit breaker, and method of assembling the circuit breaker, includes a circuit breaker housing defining an interior portion, and which includes a molded base and a separable cover. The molded base includes an interior surface and an exterior surface. The exterior surface of the molded base is operatively disposed outside of the interior portion of the circuit breaker housing, and the exterior surface of the base defines at least one current sensing unit receiving cavity configured to receive a current sensing unit therein. The molded base and separable cover are cooperatively disposed to surround the interior portion of the circuit breaker housing.

A circuit breaker, and method of assembling the circuit breaker, includes a circuit breaker housing defining an interior portion, and which includes a molded base and a separable cover. The molded base includes an interior surface and an exterior surface. The exterior surface of the molded base is operatively disposed outside of the interior portion of the circuit breaker housing, and the exterior surface of the base defines at least one current sensing unit receiving cavity configured to receive a current sensing unit therein. The molded base and separable cover are cooperatively disposed to surround the interior portion of the circuit breaker housing.

A modular circuit breaker includes a module assembly coupled to a primary assembly. The primary assembly includes a primary housing, separable contacts disposed therein, a first terminal conductor electrically connected to one of the separable contacts, a conductive tab electrically connected to another one of the separable contacts and which extends outward from a first end of the primary housing, an operating mechanism disposed in the primary housing for selectively opening and closing the separable contacts, and a trip mechanism disposed in the primary housing cooperative with the operating mechanism to trip open the separable contacts. The module assembly includes a module housing having a second terminal conductor positioned therein and electrically connected to the conductive tab, a third terminal conductor structured to be electrically connected to a neutral conductor of a load, and a fourth terminal conductor structured to be coupled to a neutral bus.

A modular circuit breaker includes a module assembly coupled to a primary assembly. The primary assembly includes a primary housing, separable contacts disposed therein, a first terminal conductor electrically connected to one of the separable contacts, a conductive tab electrically connected to another one of the separable contacts and which extends outward from a first end of the primary housing, an operating mechanism disposed in the primary housing for selectively opening and closing the separable contacts, and a trip mechanism disposed in the primary housing cooperative with the operating mechanism to trip open the separable contacts. The module assembly includes a module housing having a second terminal conductor positioned therein and electrically connected to the conductive tab, a third terminal conductor structured to be electrically connected to a neutral conductor of a load, and a fourth terminal conductor structured to be coupled to a neutral bus.

A circuit breaker includes a housing, separable contacts, a trip mechanism, a first terminal, a second terminal, a first press fit connector, a second press fit connector, a first socket, and a second socket. The first terminal is electrically connected with a first contact of the separable contacts and includes a first base section disposed outwardly from the housing. The second terminal is electrically connected with a second contact and includes a second base section disposed outwardly from the housing. The first press fit connector is attached to the first base section via a first press fit. The second press fit connector is attached to the second base section via a second press fit. The first socket is attached to the first press fit connector. The second socket is attached to the second press fit connector.

A circuit breaker includes a housing, separable contacts, a trip mechanism, a first terminal, a second terminal, a first press fit connector, a second press fit connector, a first socket, and a second socket. The first terminal is electrically connected with a first contact of the separable contacts and includes a first base section disposed outwardly from the housing. The second terminal is electrically connected with a second contact and includes a second base section disposed outwardly from the housing. The first press fit connector is attached to the first base section via a first press fit. The second press fit connector is attached to the second base section via a second press fit. The first socket is attached to the first press fit connector. The second socket is attached to the second press fit connector.

An adapter with an insertion guide for connection between a porcelain tube and a branch tube is provided at an upper end portion of the branch tube. The adapter with the insertion guide includes an insertion guide portion extending in an axial direction of the branch tube. After inserting a lower end of a central conductor into an insertion portion of an arc-extinguishing chamber, a flange of the porcelain tube is inserted into the adapter with the insertion guide by guidance of the insertion guide portion. Accordingly, in a state where a bushing and the branch tube are self-aligned with each other, a lower end portion of the central conductor is inserted into the insertion portion.

An adapter with an insertion guide for connection between a porcelain tube and a branch tube is provided at an upper end portion of the branch tube. The adapter with the insertion guide includes an insertion guide portion extending in an axial direction of the branch tube. After inserting a lower end of a central conductor into an insertion portion of an arc-extinguishing chamber, a flange of the porcelain tube is inserted into the adapter with the insertion guide by guidance of the insertion guide portion. Accordingly, in a state where a bushing and the branch tube are self-aligned with each other, a lower end portion of the central conductor is inserted into the insertion portion.