The present invention relates to an enclosed type electromagnetic switch having a status indication function, and more particularly, to and enclosed-type electromagnetic switch having a status indication function that can show the electromagnetic switch's status on an enclosure.

A differential electrical protection device D including N-1 phase conductors, each phase conductor including, between an input, or upper, connection land and an output, or lower, connection land, a portion able to pass through a torus and a portion able to pass through a current measurement and supply sensor, the input connection lands being situated in a first plane P1, and the output connection lands extending in a second plane P2, in that the supply and measurement sensors of the N1 phase conductors are each positioned in the space situated between the two planes P1,P2, and wherein it includes an additional phase conductor including an input connection land and an output connection land, a portion able to pass through the torus and a portion able to pass through an additional measurement sensor only measuring the current, this additional measurement sensor being of small size and being positioned directly above the torus in such a way that the assembly formed by the torus and the additional sensor is situated substantially in the space between the two planes P1,P2.

A multi-pole circuit interrupter configured to be coupled between an AC source and an electric load electronically detects a hazardous condition associated with energizing of poles and responds to overcome the hazardous condition using a solenoid. The multi-pole circuit interrupter comprises a first switch to energize a first pole on a phase A conductor of the multi-pole circuit interrupter and a second switch to energize a second pole on a phase B conductor of the multi-pole circuit interrupter. The multi-pole circuit interrupter further comprises an electronic solid-state circuit coupled to the phase A conductor and the phase B conductor to detect a line voltage variation and control a current to a device in response to trip an energized pole among the first pole and the second pole if only one of the first pole and the second pole is energized when a user controls a tie bar to turn ON or turn OFF the multi-pole circuit interrupter or when a trip bar fails to trip one of the first pole and the second pole.

A multi-pole circuit interrupter configured to be coupled between an AC source and an electric load electronically detects a hazardous condition associated with energizing of poles and responds to overcome the hazardous condition using a solenoid. The multi-pole circuit interrupter comprises a first switch to energize a first pole on a phase A conductor of the multi-pole circuit interrupter and a second switch to energize a second pole on a phase B conductor of the multi-pole circuit interrupter. The multi-pole circuit interrupter further comprises an electronic solid-state circuit coupled to the phase A conductor and the phase B conductor to detect a line voltage variation and control a current to a device in response to trip an energized pole among the first pole and the second pole if only one of the first pole and the second pole is energized when a user controls a tie bar to turn ON or turn OFF the multi-pole circuit interrupter or when a trip bar fails to trip one of the first pole and the second pole.

The circuit breaker is fabricated by an assembly step that makes a circuit breaker assembly with a moving contact metal plate, stationary contact metal plate, and bimetallic strip disposed in prescribed locations in an external case; and an anneal step that introduces the circuit breaker assembly made in the assembly step into an anneal oven, heats the circuit breaker assembly in the anneal oven and then cools it to anneal both the moving contact metal plate and the bimetallic strip and produce a heat-treated circuit breaker.

A circuit breaker protects an electric low-voltage circuit. The circuit breaker has a housing with grid-side connections and load-side connections for conductors of the low-voltage circuit and a series circuit containing a mechanical separating contact unit and an electronic interruption unit. The separating contact unit is paired with the grid-side connections, and the interruption unit is paired with the load-side connections. The mechanical separating contact unit has a handle for closing and opening contacts. A current sensor is arranged in a conductor path between the separating contact unit and the interruption unit, for ascertaining the level of the current of the low-voltage circuit. The circuit breaker is configured such that when current thresholds and/or current/time thresholds are exceeded, a process for preventing current flow in the low-voltage circuit is initiated. A power supply is connected to conductors of the low-voltage circuit between the grid-side connection and the separating contact unit.

A circuit breaker protects an electric low-voltage circuit, having: a housing with grid-side connections and load-side connections for the low-voltage circuit; and a mechanical separating contact unit connected to an electronic interruption unit in series. The mechanical separating contact unit is paired with the load-side connections, and the electronic interruption unit is paired with the grid-side connections. The mechanical separating contact unit is switched by opening contacts to prevent a current flow or by closing the contacts for a current flow in the low-voltage circuit. Semiconductor-based switch elements of the electronic interruption unit are switched to a high-ohmic state to prevent a current flow or to a low-ohmic state for a current flow in the low-voltage circuit. A current sensor ascertains the level of the current of the low-voltage circuit and a controller is connected to the current sensor, the mechanical separating contact unit, and the electronic interruption unit.

A multi-pole circuit interrupter configured to be coupled between an AC source and an electric load electronically detects a hazardous condition associated with energizing of poles and responds to overcome the hazardous condition using a solenoid. The multi-pole circuit interrupter comprises a first switch to energize a first pole on a phase A conductor of the multi-pole circuit interrupter and a second switch to energize a second pole on a phase B conductor of the multi-pole circuit interrupter. The multi-pole circuit interrupter further comprises an electronic solid-state circuit coupled to the phase A conductor and the phase B conductor to detect a line voltage variation and control a current to a device in response to trip an energized pole among the first pole and the second pole if only one of the first pole and the second pole is energized when a user controls a tie bar to turn ON or turn OFF the multi-pole circuit interrupter or when a trip bar fails to trip one of the first pole and the second pole.

A circuit breaker protecting an electric low-voltage circuit includes a housing with grid and load-side circuit connections. A mechanical isolating contact unit paired with load-side connections is series-connected to an electronic interruption unit paired with grid-side connections. A handle operating the isolating contact unit switches a contact opening function preventing current flow or closing function allowing current flow in the low-voltage circuit. Semiconductor-based switch elements of the electronic interruption unit switch to high-ohmic state preventing, or low-ohmic state allowing, current flow in the low-voltage circuit. A current sensor unit ascertains current level of the low-voltage circuit. A control unit is connected to the current sensor unit, isolating contact unit, and electronic interruption unit. Current flow in the low-voltage circuit is prevented upon exceeding current and/or current/time thresholds. An isolating contact unit handle sensor ascertains handle positions.

A circuit breaker protecting an electric low-voltage circuit includes a housing with grid-side and load-side connections and a series circuit of a mechanical isolating contact unit on the grid side and an electronic interruption unit on the load side. The mechanical isolating contact unit has a handle opening and closing contacts. A current sensor unit is disposed in a conductor between the isolating contact unit and the interruption unit, for ascertaining a current level of the low-voltage circuit. A control unit is connected to the current sensor unit, electronic interruption unit, and mechanical isolating contact unit. When current and/or current/time thresholds are exceeded, prevention of a current flow in the low-voltage circuit is initiated. A power supply unit supplying energy to the circuit breaker is connected to conductors of the low-voltage circuit between the isolating contact unit and the interruption unit.