Abstract: An electrical cut-off device (1) with high electrodynamic resistance in which the fixed contacts (4) and the moving contact (5) are arranged according to an architecture forming a current loop so that the Laplace electromagnetic forces, called compensation forces (Fc), generated by the circulation of the current (I) in the current loop, are oriented in a direction flowing from the inside toward the outside of the current loop, and in which the actuator mechanism (6) is arranged for moving the moving contact (5) inside of the current loop, from its switched-off position to its switched-on position in a direction (Fd) that is identical to the direction of the compensation forces (Fc).

Abstract: A molded case houses switching parts and includes a case main body and a cover placed on an upper portion of the case main body. The case main body includes a bottom portion case that forms a bottom portion of a circuit breaker and an intermediate case, placed on an upper portion of the bottom portion case, having a dividing wall that blocks off a space between the intermediate case and the bottom portion case. A power source side terminal block and second movable contact are fitted inside the bottom portion case, and a first movable contact, the load side terminal block, the contact portion, and the arc extinguishing chamber are fitted inside the intermediate case.

Abstract: A pressure sensitive circuit breaker trip unit has a case forming a gas receiving cavity and a cavity accommodating movement of an actuator body with a trip lever. The actuator is moved by pressure of circuit interruption gases entering the gas receiving cavity. The actuator body has a hollow therein for accepting the interruption gases and accompanying hot debris thereby reducing any fouling of the movement accommodating cavity which may impede movement of the actuator body on subsequent circuit interruptions.

Abstract: A switching device having an ultra-fast actuating mechanism for opening electric contacts, the device having a propulsion coil and a conducting disk. A stationary contact collaborates in a closed position with a movable contact, said contacts being moved to an open position by repulsion of the conducting disk. A biasing device generates a closing force to hold the electrical contacts in the closed position. Latching means, for maintaining the movable contact in the open position, includes a magnetic yoke having an attraction coil providing an attraction force of a magnetic movable armature. The movable contact is supported by a contact-bearing support having drive means collaborating with the magnetic movable armature to cause movement thereof when movement of the movable contact takes place.

Abstract: A power contact device comprises two stationary and movable contact elements, the two elements being in the form of two juxtaposed coiled turns arranged facing one another in the open position. Each turn is made from a material that is both magnetic and current conducting to constitute a single part acting as power contact, as coil generating a magnetic induction field, and as magnetic circuit performing strengthening and channelling of said magnetic field.

Abstract: A stationary contact arm assembly for a molded case circuit breaker includes a stationary contact arm having a terminal portion and a contact portion provided at both end portions thereof in the length direction, and an inclined extension portion provided between the contact portion and the terminal portion, a flat extension portion forming a space between the flat extension portion and a bottom surface of the contact potion, a bent portion formed from the flat extension portion to the terminal portion; a magnet assembly having a plurality of steel plates at least part of which is installed to be pushed into a space between the flat extension portion and contact portion in the stationary contact arm; and an elastic support plate having an elastic support portion installed on the flat extension portion of the stationary contact arm to support the magnet assembly.

Abstract: A circuit breaker having a movable contact arm for opening and closing the circuit which is controlled separately by a circuit breaker mechanism for circuit protection and by a switch lever mechanism which does not require actuation of the circuit breaker mechanism to function. The switch lever may be activated by a solenoid or other suitable means, and various interlocking mechanical states exist among the elements that provide added safety features.

Abstract: An enclosed switch includes a switch assembly having separable contacts; an operating mechanism structured to open and close the separable contacts; and a shunt trip mechanism cooperating with the operating mechanism to trip open the separable contacts, wherein the operating mechanism includes a manual operating mechanism.

Abstract: A reed switch assembly of a magnetic latching relay includes a movable reed, an immovable reed, a movable contact and an immovable contact. The movable contact and the immovable contact are disposed at respective ends of the movable reed and the immovable reed. The end with the movable contact of the movable reed is bent twice to form a reverse U-shaped end. The end with the immovable contact of the immovable reed is bent twice to form a U-shaped end. The reverse U-shaped end of the movable reed and the U-shaped end of the immovable reed are interlaced. The present invention further comprises a tension spring. One end of the tension spring is fixed to the reverse U-shaped end of the movable reed, and another end of the tension spring is mounted to a base of the magnetic latching relay.

Abstract: A movable contactor assembly for a current limiting type circuit breaker comprises a movable contactor having a pair of curved protrusions having cam profiles, a shaft to rotatably support the movable contactor located therein, a pair of contact levers each having a contact surface contactable with the curved protrusion of the movable contactor and a pair of spring supporting recess portions and a pair of springs each having both end portions supported by the spring supporting recess portions, the pair of springs applying an elastic force as contact pressure for maintaining a contact state between the movable contactor and the stationary contactor when the movable contactor is located at the first position, and applying the elastic force in a direction to separate the movable contactor from the stationary contactor when the movable contactor is moved over a dead point while rotating toward the second position.

Abstract: A circuit interruption device includes a conductive element configured to be coupled to a circuit, a contact arm configured to move with respect to the conductive element between a first position and a second position, and a biasing element configured to apply a biasing force on the contact arm to maintain contact between the contact arm and the conductive element when the contact arm is in the first position, wherein the contact arm is configured such that a current flow through the contact arm causes an electromagnetic repulsive force to act on the contact arm in a second direction that is opposite the first direction.

Abstract: An installation switching device which rapidly disconnects short-circuit currents is provided. A contact lever is arranged at least partially in an air gap in a magnetic circuit such that, in case of a short circuit, the interaction between current flow and magnetic flux within the air gap can result in an electrodynamic force effect, which leads to rapid opening of at least one contact point. A switching mechanism acts via a first operating connecting line on the contact lever to open the contact point and/or to keep it open. In case of overcurrent tripping, an overcurrent release acts, by a switching mechanism and via a second operating connecting line, on the switching mechanism to open the contact point and keep it open. In case of short-circuit tripping, the contact lever acts via a third operating connecting line on the switching mechanism to keep the contact point open.

Abstract: A load breaking switch including a rotor embodied as a switch shaft segment, and a contact arm pivotally mounted in the rotor pivotable between an ON and OFF position about an axis of rotation and at the free end of which is a contact piece which is pivotable with the contact arm and is in contact with an opposite fixedly arranged contact piece when the contact arm is in its ON position. Current flows through the switch via the contact pieces and the contact arm. The contact arm is pivotable into its OFF position when the current flowing via the contact pieces exceeds a rated current value or an overload current value. A magnetizable area is spatially arranged inside the rotor such that the current flowing through the contact arm in this area induces a magnetic field which exerts a torque on the contact arm.

Abstract: A current path in an installation switching device includes first and second contact points, which respectively include first and second levers. The second lever is arranged in an air gap in a magnetic circuit. In case of a short circuit, an electrodynamic force, which leads to rapid opening of the second contact point, can act on the second lever due to interaction of current flow with magnetic flux within the air gap. A switching mechanism acts via a first connecting line on the first lever to open and/or keep open the first contact point. In case of overcurrent tripping, an overcurrent release acts through the switching mechanism and a second connecting line on the switching mechanism to open and keep open the first contact point. In case of short-circuit tripping, the second lever acts via a third connecting line on the switching mechanism to keep the first contact point open.

Abstract: A circuit breaker comprises a latching plate rotatably coupled to a moveable plate, and tensile type latching springs, each latching spring having two ends fixed to the latching plate and the moveable plate, respectively. Time taken for a moveable contact to be lifted up from a contact time point between the moveable contact and a fixed contact may be shortened, and thus a time duration for which an accident current flows may be reduced. Accordingly, the amount of energy applied to the circuit breaker may be reduced, and a breaking function of the circuit breaker may be enhanced. Furthermore, since a contact pressure between the moveable contact and the fixed contact has a constant change, a reliability on a conductive state of the moveable contact and the fixed contact may be enhanced.

Abstract: A power contact device comprises two stationary and movable contact elements, the two elements being in the form of two juxtaposed coiled turns arranged facing one another in the open position. Each turn is made from a material that is both magnetic and current conducting to constitute a single part acting as power contact, as coil generating a magnetic induction field, and as magnetic circuit performing strengthening and channelling of said magnetic field.

Abstract: An electromagnetic trip device for a circuit breaker is provided. The electromagnetic trip device includes a current path having a conductor guiding an electric current through at least one contact point formed between a fixed and at least one movable contact piece. A contact lever carries the at least one movable contact piece. The contact lever is mounted to be movable between a closed contact position and an open contact position. The electromagnetic trip device also includes a magnetic circuit with an air-gap. The movable contact lever is at least partially located in the air-gap. The electric current flows through the contact lever in a direction substantially perpendicular to the orientation of magnetic flux in the air-gap.

Abstract: Exemplary embodiments are directed to an electrical overcurrent tripping device for a circuit breaker. The tripping device includes an actuating member which in case of an overcurrent is driven to interact directly or indirectly with a movable contact piece of the circuit breaker to open a contact point in the circuit breaker if the overcurrent is exceeding a preset tripping threshold for a predetermined tripping delay time. The actuating member is coupled to a magnetic circuit such that the driving force acting on the actuating member is created by the magnetic field of the magnetic circuit, said magnetic field being induced by the overcurrent. The actuating member is coupled to an electromagnetic damping arrangement to set the tripping delay time, and is connected to a coupling spring configured to adjust the overcurrent tripping threshold.

Abstract: A magnetic actuator includes a coil bobbin that has electrical wire wound around a core. The magnetic actuator also includes a plunger located in a central portion of the magnetic actuator and configured to move within a bore located in the central portion, and at least one spring located adjacent the central portion. When electrical current is provided to the electrical wire, an electromagnetic field causes the plunger to move from a first position to a second position, and stored energy associated with the spring aids in moving the plunger to the second position. The magnetic actuator further includes a linking portion coupled to the plunger, wherein the linking portion is configured to initiate an action based on movement of the plunger.

Abstract: An interrupter includes at least four pairs of contacts. Each pair of contacts includes a stationary contact positioned to abut a corresponding moveable contact. The moveable contacts are coupled to a rotating member. The rotating member is coupled to a driving member via a biasing member. The driving member is rotated causing all four pairs of contacts to separate and open a circuit quickly.

Abstract: A charging assembly for an electrical switching apparatus includes a cam shaft and including a number of cams. A latch lobe and a charging handle are coupled to opposing ends of the cam shaft. Each stroke of the charging handle pivots the cams a predetermined amount. A rocker arm includes a first portion cooperating with the cams, a second portion translating movement of the cams into movement of a stored energy mechanism, and a third portion cooperating with a close D-shaft having a close latch. A close prop includes a first end cooperating with the close D-shaft, and a second end including a roller that cooperates with the latch lobe. The close D-shaft pivots between latched and unlatched positions. The third portion cooperates with the close D-shaft to hold the close latch in the unlatched position until the charging handle has been pivoted a predetermined number of strokes.

Abstract: A circuit interruption device includes a conductive element configured to be coupled to a circuit, a contact arm configured to move with respect to the conductive element between a first position and a second position, and a biasing element configured to apply a biasing force on the contact arm to maintain contact between the contact arm and the conductive element when the contact arm is in the first position, wherein the contact arm is configured such that a current flow through the contact arm causes an electromagnetic repulsive force to act on the contact arm in a second direction that is opposite the first direction.

Abstract: A movable contactor assembly for a current limiting type circuit breaker comprises a movable contactor having a pair of curved protrusions having cam profiles, a shaft to rotatably support the movable contactor located therein, a pair of contact levers each having a contact surface contactable with the curved protrusion of the movable contactor and a pair of spring supporting recess portions and a pair of springs each having both end portions supported by the spring supporting recess portions, the pair of springs applying an elastic force as contact pressure for maintaining a contact state between the movable contactor and the stationary contactor when the movable contactor is located at the first position, and applying the elastic force in a direction to separate the movable contactor from the stationary contactor when the movable contactor is moved over a dead point while rotating toward the second position.

Abstract: A concept of a double-breaking contact system with a rotating contact arm is disclosed. In at least one embodiment, a novel arrangement of fixed conductors that cross over the contact arm is presented. A double-breaking contact system for a low voltage circuit breaker of at least one embodiment includes a double-breaking contact arm extending along a longitudinal axis and being rotatable across a central bearing; a first fixed conductor and a second fixed conductor, each conductor contacting one end of the contact arm, respectively and having first segments below the contact arm, second segments above the contact arm and third segments crossing over the contact arm and connecting the first segments with the corresponding second segments of each conductor; wherein the first segments and/or the second segments are arranged parallel to each other for guiding a current in a parallel direction through the respective first and/or second segments, but reverse to the current in the contact arm.

Abstract: A circuit breaker and method includes a mechanical pole moveable between a latched position and an unlatched position to open an electrical connection between a pair of electrical contacts. An electronic tripping device is configured to respond to a sensor signal. The sensor signal is output from a condition sensor wherein upon receiving the sensor signal the electronic tripping device trips the mechanical pole into the unlatched position.

Abstract: A switching device, in particular a circuit breaker, is disclosed including a switching shaft for mounting a rotary contact link. According to at least one embodiment of the invention, the rotary contact link has at least one groove-shaped longitudinal cutout, arranged within and along the transversely running cutout in relation to the switching shaft. Two grooves, which are arranged radially opposite one another, with in each case a bend or arcuate profile are provided in the cutout of the switching shaft, the respective two ends of the grooves being positioned radially further outward than the respective central region thereof. In each case one groove is connected to the at least one groove-shaped longitudinal cutout via a transverse bolt guided there between. At least one prestressed spring element is provided which pushes the respective transverse bolt radially outward.

Abstract: A shunt separator is provided for an electrical switching apparatus including a housing, separable contacts enclosed within the housing, an operating assembly including a trip bar, and a trip assembly. The trip assembly cooperates with the trip bar to trip open the separable contacts in response to a fault condition. The trip assembly includes a number of shunts. The shunt separator includes a molded projection, which extends outwardly from the housing of the electrical switching apparatus. The molded projection at least partially surrounds a portion of the trip bar, thereby separating the number of shunts from the trip bar.

Abstract: The present invention relates generally to a mechanism of a contact system for circuit breakers. More particularly, the invention encompasses a mechanism for a rotary double-break contact system, which enables a direct transfer of torque from stored energy components, such as, springs, to the contact arm in the ON-position (contacts closed) without using intermediate cam surface. The mechanism described in the invention also ensures reliable locking of the contact arm in the blow-off position using stationary means that are integral with or fixed to a crossbar module. This invention enables to achieve significant reduction or even to eliminate friction at certain critical interfaces between the contact mechanism components, thus, reducing or potentially eliminating hysteresis, and improving performance consistency, and also eliminating mechanism performance dependency on wear level and condition of an intermediate cam surface.

Abstract: A mold cased circuit breaker is disclosed that enables a user to easily discern an actually connected state between stationary contactors and movable contactors and forcibly separates a connection therebetween if there arises electrical fault, wherein the circuit breaker comprises: a first isolation link hinged at a lower end thereof to a shaft unit and selectively engaged at an upper end thereof with a lateral surface of a lever; a second isolation link centrally formed with an oblong hole for accommodating a guide pin protruded on a side plate and linked at one end thereof to an upper end of the first isolation link; and an isolation lever adjacently positioned at one end thereof to the other end of the second isolation link, and so positioned at the other end thereof as to selectively engage with a nail, and rotatably mounted at the side plate to rotate the nail by way of operation of the second isolation link.

Abstract: A mechanism for a circuit breaker contact arm that allows current limiting by reducing the opening time is disclosed. A secondary trip assembly is arranged to actuate due to magnetic forces generated during an undesirable electrical condition such as a short circuit. The secondary trip system releases a contact arm assembly allowing the contact arm to rotate to an open position that interrupts the flow of electrical power.

Abstract: An arc member is provided for an electrical switching apparatus. The electrical switching apparatus includes an operating mechanism for opening and closing separable contacts, and an arc chute disposed proximate the separable contacts to attract an arc generated thereby. The separable contacts include a stationary contact and a movable contact. The stationary contact has an edge, which is disposed in a plane. The arc member includes an arc element disposed between the stationary contact and the arc chute. The arc element has first and second portions and first and second arc attractors. The first arc attractor extends outwardly from the first portion toward the plane of the edge of the stationary contact to draw the arc from the separable contacts to the arc member. The second arc attractors, which are disposed on the second portion of the arc element, direct the arc into the arc chute.

Abstract: An electrical contact assembly resists blow-open under conditions of increased current flow. The contact assembly includes parallel conducting surfaces on fixed and moveable conductors that generate forces biasing the contacts together under current flow conditions. The assembly also includes a magnetic armature and yoke that exert a magnetic force to resist movement of the contacts toward the open position. Current flowing through both the fixed and moveable conductors contribute to the magnetic force. A spring may additionally bias the contacts to the closed position. The contact assembly may be used in remote-controlled circuit breaker applications.

Abstract: Embodiments of an automatic single- or multi-pole circuit breaker for use in low-voltage applications are disclosed. The circuit breaker includes at least a first fixed contact this is coupled/uncoupled with a first moving contact. The moving contact is operatively connected to an operating mechanism that enables its displacement. The circuit breaker includes a kinematic tripping device driven by means of a first separating movement of the moving contact away from the fixed contact. The kinematic tripping device includes an operative member capable of tripping the operating mechanism, which in turn takes effect on the moving contact, thus determining a second rapid separating movement until the circuit breaker tripped position is reached.

Abstract: A method of forming a switch assembly that includes a magnetic intensifier constructed to extend in generally close proximity to one of the stationary contact and the arc contact. During communication of power through the contactor assembly, the magnetic intensifier manipulates a magnetic field associated with current passing through the switch assembly and increases the magnitude of a magnetic force directed to the arc arrestor. Preferably, the magnetic intensifier is formed integrally with a turnback associated with one of the stationary contact or the arc contact. Such a construction simplifies the manufacture and assembly of the contactor assembly and provides efficient and repeatable arc suppression.

Abstract: A pole shaft assembly for a circuit breaker includes a receiving portion disposed on the exterior side of the housing, a pole shaft pivotably disposed within the receiving portion and including at least one protrusion, a number of cover members overlaying the pole shaft and the receiving portion, at least one first seal disposed between the receiving portion and a corresponding protrusion, and at least one second seal disposed between such protrusion and a corresponding one of the cover members. The seals resist undesired entry of debris between the receiving portion and the pole shaft, and control the discharge of arc gases from the circuit breaker. The first seal is formed by the interaction between the receiving portion and the corresponding protrusion. The second seal is formed by the interaction between the protrusion and the corresponding one of the cover members.

Abstract: An electrical distribution panel includes a backplane, a circuit breaker comprising a load conductor for transmitting electrical power to a load, and a load sensing assembly comprising a load sensor operatively coupled to the load conductor for detecting an electrical load of the load conductor and generating a load signal proportional to the electrical load. The load sensing assembly is selectively positionable with respect to the load conductor at a plurality of fixedly secured positions on the backplane to facilitate positioning the load sensor with respect to the load conductor.

Abstract: A shunt assembly is provided for an electrical switching apparatus including a conductor assembly having a load conductor and a movable contact assembly with a number of movable contact arms. The movable contact assembly is movable in response to a fault current. The shunt assembly includes a number of flexible conductive elements each having a first end electrically connected to the load conductor, a second end electrically connected to a corresponding one of the movable contact arms, and a number of bends disposed between the first and second ends. At least one constraint element is disposed proximate a corresponding one of the bends and constrains movement of the flexible conductive element in response to the fault current, thereby translating the magnetic repulsion force associated with the fault current into a corresponding torque of the movable contact arms of the movable contact assembly.

Abstract: A spring assembly is provided for a yoke assembly of an electrical switching apparatus including a housing, separable contacts enclosed by the housing, and an operating mechanism structured to open and close the separable contacts. The operating mechanism includes a pole shaft. The yoke assembly is coupled to the pole shaft and is movable among first and second positions corresponding to the separable contacts being closed and open, respectively. The spring assembly includes a number of first springs having a first spring rate and being coupled to the yoke assembly, and a number of second springs having a second spring rate and being coupled to the yoke assembly. The second spring rate is different than the first spring rate. The number of first springs and the number of second springs bias the yoke assembly toward the second position.

Abstract: An apparatus includes a plurality of contacts for interrupting current flow when an overcurrent condition occurs, each contact including a mating face displaced at an angle with respect to a pivot point of at least one of the contacts, where the displacement of the mating faces is configured to minimize a repulsion force moment arm from the pivot point of at least one of the contacts.

Abstract: A bearing assembly is provided for an electrical switching apparatus including a housing having at least one parting line and an exterior side, a stationary contact assembly disposed on one side of the parting line, a movable contact assembly, and an operating mechanism with a pole shaft for moving the movable contact assembly into and out of electrical contact with the stationary contact assembly. The bearing assembly includes a number of primary bearings pivotably supporting the pole shaft on the same side of the parting line as the stationary contact assembly. An integral bearing section including secondary bearings pivotably couples the pole shaft to the housing at least one bearing cover member having a fastening portion. The pole shaft is pivotably disposed at or about the integral bearing section on the exterior side of the housing. A housing and an electrical switching apparatus are also disclosed.

Abstract: A manual opening device is for an electrical switching apparatus, such as a synchronous circuit breaker, including a housing having an opening, a plurality of pole mechanisms each comprising separable contacts, and at least one operating mechanism including a number of actuators adapted to open and close the separable contacts. The operating mechanism is supported by the housing and includes a corresponding pole shaft. The manual opening device comprises an operating handle, a cam assembly, and a drive assembly. A first end of the operating handle protrudes through the opening of the housing and the second end is coupled to the cam assembly. The drive assembly couples the cam assembly to the corresponding pole shaft of the operating mechanism and cooperates with the corresponding pole shaft and actuators to simultaneously open the separable contacts when the operating handle is moved from a first position to a second position.

Abstract: An interlock assembly is provided for a circuit breaker charging assembly. The charging assembly includes a cam shaft, a latch mechanism, such as a D-shaft, a latch assembly, and a charging handle. The charging handle pivots the cam shaft. The D-shaft is pivotable between first and second positions corresponding to the D-shaft latching and unlatching the latch assembly, respectively. The interlock assembly includes a lever coupled to and pivotable with the D-shaft, and a latch interlock pivotably coupled to the circuit breaker housing. The latch interlock moves between locked and unlocked positions corresponding respectively to the first end of the latch interlock moving the lever to position the D-shaft in the second position and the first position. Unless and until the stored energy mechanism is substantially fully charged, the latch interlock is disposed in the locked position and the latch assembly is movable with respect to the D-shaft.

Abstract: This invention pertains to an automatic single- or multi-pole circuit breaker (1) for use in lowvoltage applications. The circuit breaker (1) includes at least a first fixed contact (10) that is coupled/uncoupled with a first moving contact (20). The latter is operatively connected to an operating mechanism (5) that enables its displacement. The circuit breaker (1) according to the invention includes a kinematic tripping device driven by means of a first separating movement of the moving contact (20) away from the fixed contact (10). The kinematic tripping device includes an operative member capable of tripping the operating mechanism (5), which in turn takes effect on the moving contact (20), thus determining a second rapid separating movement until the circuit breaker tripped position is reached.

Abstract: A contact spring assembly is provided for an electrical switching apparatus including a movable contact assembly and a stationary contact assembly having stationary electrical contacts. The movable contact assembly includes a carrier assembly, and movable contact arms pivotably coupled to the carrier assembly and carrying movable electrical contacts. The contact spring assembly includes a first contact spring housing member, a second contact spring housing member coupled to and disposed opposite from the first contact spring housing member, a spring guide disposed between and coupled to at least one of the first and second contact spring housing members and including spring holes, springs received in the spring holes, and sliders coupled to the springs. The springs and sliders individually bias the movable contact arms and movable electrical contacts toward engagement with corresponding stationary electrical contacts. A movable contact assembly and an electrical switching apparatus are also disclosed.

Abstract: The invention relates to a magnetic actuating device containing a reference element and an adjusting element which is movably disposed between first and second end positions with respect to the reference element. The reference and/or adjusting elements contain a magnetizable material. A drive coil is provided for generating a magnetic field that moves the adjusting element from the first to the second end position. A mechanical clamping device is provided for producing mechanical forces that move the adjusting element from the second to the first end position. A fixing device is provided with a permanent magnet for generating a holding force fixing the adjusting element in the second end position with respect to the reference element. The fixing device contains a fixing unit separated from the adjusting element and provided with the permanent magnet.

Abstract: A circuit breaker includes a housing, separable contacts, an operating mechanism structured to open and close the separable contacts, a power conductor including a first conductor and a second reverse loop conductor, the second reverse loop conductor carrying one of the separable contacts, and a slot motor. The slot motor includes a first slot motor portion, and a second slot motor portion including a plurality of generally U-shaped slot motor laminations, a first insulative housing portion, and a second insulative housing portion. The first and second insulative housing portions interlock with one another to form a generally U-shaped insulative slot motor housing. The first and second insulative housing portions cooperatively receive the generally U-shaped slot motor laminations.

Abstract: Certain exemplary embodiments comprise a device comprising: a trip mechanism adapted to engage an operating mechanism of an alternating current circuit breaker, said trip mechanism comprising: a bi-metal element arranged lengthwise into a first end zone, a central zone, and a second end zone, a load bus coupled to said first zone, said second end zone adapted to engage an armature latch that is adapted to trip on operating mechanism of the circuit breaker; and an electromagnetic element coupled to the load bus.

Abstract: An auxiliary switch sub-assembly is provided for a telecommunication system circuit breaker including a housing having an opening, separable contacts inside the housing, and an operating mechanism operating the separable contacts between open and closed positions. The operating mechanism comprises an operating handle operable among a first position corresponding to the separable contacts being open and a second position corresponding to the separable contacts being closed. The operating handle has a first end protruding from the opening of the housing, and a second end. The auxiliary switch sub-assembly includes an auxiliary switch including an actuator, and a mount attaching the auxiliary switch to the operating mechanism of the circuit breaker within the housing thereof. The actuator is mechanically actuated by a portion of the second end of the operating handle. An electrical switching apparatus employing an auxiliary switch sub-assembly is also disclosed.

Abstract: A circuit breaker mechanism comprises a line terminal, a load terminal and a set of contacts between the terminals. A fixed contact is connected to the line terminal, and a moving contact is connected to the load terminal via a conductive frame and a load sensing element. The moving contact is fixed to a contact carrier which is supported pivotably on conductive pins which are electrically connected to the frame. A spring urges the contact carrier into snug engagement with the conductive pins. The arrangement obviates the need for a flexible conductive pig-tail to form a current path between the contact carrier and the frame, simplifying the construction and improving the performance of the circuit breaker. With this arrangement, the current path extends from the line terminal to the moving contact, through the contact carrier, through the conductive pins, to the conductive frame and through the load sensing element to the load terminal.

Abstract: An electrical contact assembly resists blow-open under conditions of increased current flow. The contact assembly includes parallel conducting surfaces on fixed and moveable conductors that generate forces biasing the contacts together under current flow conditions. The assembly also includes a magnetic armature and yoke that exert a magnetic force to resist movement of the contacts toward the open position. Current flowing through both the fixed and moveable conductors contribute to the magnetic force. A spring may additionally bias the contacts to the closed position. The contact assembly may be used in remote-controlled circuit breaker applications.