A fusible switch disconnect device includes a housing adapted to receive at least one fuse therein, and a switchable contact for connecting the fuse to circuitry. A tripping mechanism and control circuitry are provided to move the switchable contact to an open position in response to a predetermined electrical condition.

The present invention discloses a field assembled electrical distribution device assembled from various prepackaged modular kits. The prepackaged modular kits include all of the components required for their assembly. The prepackaged modular kits, when assembled by a certified assembler using a certified method and verification means provided by the modular kit manufacturer and one or more well know third-party certifiers, meets the requirements local, national and international electrical codes and is eligible for the third-party's certification mark.

The power distribution system includes a plug-in frame, a board located in the plug-in frame, and at least one circuit breaker. The board includes a plurality of slot positions, a position signal acquisition apparatus is disposed on the board, and the position signal acquisition apparatus is configured to acquire an address of any slot position on the board. A first end of each circuit breaker extends into the plug-in frame and is plugged to a slot position on the board, and a second end of the circuit breaker is located at an open end of the plug-in frame. The open end of the plug-in frame is provided with an address code, the address code corresponds to an address of a slot position on the board, and each circuit breaker corresponds to at least one address code.

A fusible switch disconnect device includes a housing adapted to receive at least one fuse therein, and a switchable contact for connecting the fuse to circuitry. A tripping mechanism and control circuitry are provided to move the switchable contact to an open position in response to a predetermined electrical condition.

An auxiliary apparatus is coupled to an electric circuit breaker. In the open position, the breaker interrupts the circulation of a current in an electrical connection, which includes at least one electrical conductor and a mechanical output member movable between an operating position and a stop position associated with the interruption of the circulation of the current in the connection after opening of the breaker. The auxiliary apparatus includes at least one current sensor to measure the current circulating in a respective conductor, and a mechanical coupler to couple with the mechanical output member. The mechanical coupler also detects the opening of the breaker. The auxiliary apparatus also includes a device for determining a cause of the detected opening, based on the intensity measured by the current sensor.

The power distribution system includes a plug-in frame, a board located in the plug-in frame, and at least one circuit breaker. The board includes a plurality of slot positions, a position signal acquisition apparatus is disposed on the board, and the position signal acquisition apparatus is configured to acquire an address of any slot position on the board. A first end of each circuit breaker extends into the plug-in frame and is plugged to a slot position on the board, and a second end of the circuit breaker is located at an open end of the plug-in frame. The open end of the plug-in frame is provided with an address code, the address code corresponds to an address of a slot position on the board, and each circuit breaker corresponds to at least one address code.

A fusible switch disconnect device includes a housing adapted to receive at least one fuse therein, and a switchable contact for connecting the fuse to circuitry. A current detecting element, a tripping mechanism, and control circuitry are provided to move the switchable contact to an open position in response to predetermined electrical current conditions in the device.

A fusible switch disconnect device includes a housing adapted to receive at least one fuse therein, and a switchable contact for connecting the fuse to circuitry. A tripping mechanism including an electromagnetic coil is operable to move the switchable contact to an open position in response to a predetermined electrical condition when the fuse is engaged and when the switchable contact is in the closed position.

A plug-on neutral (PON) device includes a housing that defines a phase cooperation portion configured to physically cooperate with phase buses of a bus assembly. The phase cooperation portion is configured to be electrically isolated from the phase buses and stabilize the PON device when installed on the bus assembly. A neutral cooperation portion is configured to physically cooperate with the neutral bus and to physically stabilize the PON device when installed. An electrical connector disposed at the neutral cooperation portion is configured to electrically connect to the neutral bus at an external end and to electrically connect to a conductive current path at its internal end. A lug assembly has one or more conductive terminal lugs, each terminal lug configured to receive current from an external neutral source via an aperture in the lug end of the housing and to electrically connect to the current path.

The present disclosure relates to an earth leakage breaker and an arc detection apparatus attachable/detachable to/from the earth leakage breaker. An earth leakage breaker and an arc detection apparatus according to one embodiment of the present disclosure comprise: a body of the earth leakage breaker; and an arc detection module attachably/detachably coupled to the body of the earth leakage breaker so as to detect an arc current, wherein the arc detection module comprises: an arc detection unit connected to a first load side terminal of the body of the earth leakage breaker so as to detect an arc current flowing through a line; a control unit for determining an arc current on the basis of an arc detection signal delivered by the arc detection unit; and an output unit for outputting a signal or a current, according to a control signal of the control unit.