An accumulator control system for one or more electrical breaker poles includes an accumulator mechanism presenting a control handle movable at least between breaking and closing positions; a first link connected to the outer carriage and pivoting about a first pivot point between first and second positions, by actuating the control handle of the accumulator mechanism between the breaking and closing positions; a second link pivotable about a pivot axis and connected to the first link by a sliding connection so that the movement of the first link, between the second and first positions, causes the second link to pivot about the pivot axis between a position for closing one or more breaker poles, and a position for opening one or more breaker poles. The control system is further configured to exert an additional pivoting force on the second link when the control handle is actuated beyond the breaking position.

A removable switching element for switching an electric current for an electrical switching device includes a housing; first and second fixed electrical conductors; a mobile electrical conductor that can be moved between a first position, in which the mobile electrical conductor electrically connects the first and second fixed electrical conductors; and a second position, in which the mobile electrical conductor is electrically isolated from the first and second fixed electrical conductors. The housing includes two windows passing therethrough, one being located facing an area of contact between the mobile conductor and the first fixed electrical conductor and the other being located facing an area of contact between the mobile conductor and the second fixed electrical conductor.

A two-level latch mechanism for an operation mechanism of a circuit breaker is provided. The operation mechanism includes: a tripping component, a left side plate, a right side plate, a latch, a half shaft, a lever, and a main shaft. The tripping component, the latch and the lever are mounted between the left side plate and the right side plate. The half shaft and the main shaft penetrate through the left side plate and the right side plate, and extend out of the left side plate and the right side plate. The tripping component, the latch, the half shaft, the lever, and the main shaft move in linkage. The tripping component includes a tripping buckle and a latch surface is disposed on a second end of the tripping buckle. The tripping component, the latch component and the half shaft component form a two-level latch.

An operation mechanism of a circuit breaker includes: a tripping component; a left side plate; a right side plate; a latch; a half shaft; a lever; and a main shaft. The tripping component, the latch, the half shaft and the lever are mounted between the left side plate and the right side plate. The half shaft and the main shaft penetrate through the left side plate and the right side plate, and extend out of the left side plate and the right side plate. The lever includes a sheet metal bending piece. The sheet metal bending piece is bent to form a top wall and two side walls. The tripping component, the latch, the half shaft, the lever and the main shaft move in linkage. The tripping and the latch form a two-level latch. The operation mechanism of the circuit breaker is manual operation.

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.

An accumulator control system for one or more electrical breaker poles comprises: an accumulator mechanism presenting a control handle movable at least between breaking and closing positions; a first link connected to the outer carriage and pivoting about a first pivot point between first and second positions, by actuating the control handle of the accumulator mechanism between the breaking and closing positions; a second link pivotable about a pivot axis and connected to the first link by a sliding connection so that the movement of the first link, between the second and first positions, causes the second link to pivot about the pivot axis between a position for closing one or more breaker poles, and a position for opening one or more breaker poles. The control system further comprises means for exerting additional pivoting force on the second link when the control handle is actuated beyond the breaking position.

An off-stop mechanism for a circuit breaker. Off-stop mechanism includes a handle moveable to an OFF configuration, the handle including a blocking engagement portion, a blocking member pivotally coupled at a pivot location, a linkage coupled between a cross bar housing and a linkage attachment location of the blocking member, the linkage being configured to: position the blocking member in an unblocked orientation when the main contacts are not fused together, and in a blocked orientation when the main contacts are fused together, wherein blocking member in the blocked orientation engages the blocking engagement portion as the operating handle is moved to the OFF configuration wherein the engagement places the blocking member in compression between the pivot location and the blocking contact portion. Circuit breakers including the off-stop mechanism and methods of operating a circuit breaker are also provided, as are other aspects.

The present invention relates to a multi-pole molded case circuit breaker, more particularly, to a multi-pole molded case circuit breaker having a safety device (with an isolation function) which prevents a manipulation handle from being moved to an off-position when a fusion occurs on a contact part

A circuit breaker having a positive-off stop feature includes an operating lever rotatably coupled to a side frame, a tension lever coupled to the side frame, and an upper toggle linkage and a stop link each rotatably coupled to the tension lever. The upper toggle linkage may be configured to rotate the stop link. The operating lever may be configured to move rotatably to and from an ON position and an OFF position provided the main contacts of the circuit breaker are not welded or otherwise stuck together. Should the main contacts become welded or otherwise stuck together, the upper toggle linkage may be configured to rotate the stop link to a position wherein the stop link may be configured to prevent the operating lever from moving into the OFF position. Methods of assembling a circuit breaker positive-off stop feature are also provided, as are other aspects.

The present technology relates to a safety feature of industrial circuit breakers. More specifically, a mechanism is disclosed that prevents a circuit breaker switch from being turned to the off position when contact welds are present. In an embodiment, a circuit breaker includes an interlock component that interfaces with a rotary disk used for switching the device on and off. When no contact welds are present, the circuit breaker may be turned off and the interlock component rotates out of the way of the rotary disk due to linear motion resulting from separation of the contacts. However, when a contact weld exists, the interlock component does not move out of the way because no linear motion occurs due to failure to separate the welded contacts. In such a scenario, the interlock component catches an opposing undercut on the rotary disk preventing it from rotating past the point of interlock.