1047results about "Circuit-breaking switch contacts" patented technology

An electrically isolated rotor assembly for a cassette assembly of a circuit breaker includes a rotor having a first side and an opposing second side, a first isolation cap disposed on the first side, a second isolation cap disposed on the second side. Each isolation cap preferably includes a centrally located knob with a bushing surrounding each knob, wherein the bushings are sized for securement within apertures within first and second cassette half pieces.

A contactor assembly for a circuit breaker comprises a first spring supporting pin, a cam plate, a second spring supporting plate, a link, and a spring. When a movable contactor is rotated without a rotation axis, a fluctuation of a rotation center of the movable contactor is not generated and a current limiting function is fast performed. Also, after contacts are separated from each other, the movable contactor is prevented from returning towards fixed contactors and the separated position is maintained for a predetermined time. An assembly process of the contactor assembly is simplified.

An electrically isolated rotor assembly for a cassette assembly of a circuit breaker includes a rotor having a first side and an opposing second side, a first isolation cap disposed on the first side, a second isolation cap disposed on the second side. Each isolation cap preferably includes a centrally located knob with a bushing surrounding each knob, wherein the bushings are sized for securement within apertures within first and second cassette half pieces.

A current-interrupting section of a molded case circuit breaker includes fixed contact shoes and a rotary bridge-type contact shoe held in a contact shoe holder. A pair of pressure springs is assembled in the contact shoe holder to press the rotary contact shoe to the fixed contact shoes. The pressure spring is torsion coil springs and have U-shaped offset arm portion drawn out from the center of the coil. A pair of the torsion coil springs is arranged above and under the rotary contact shoe. Furthermore, legs of the torsion coil springs at ends are hooked to sidewalls of the contact shoe holder. The offset arm portions at the center of the torsion coil springs engage the rotary contact shoe at positions symmetrical with respect to the rotational center of the rotary contact shoe.

A line terminal for a circuit breaker includes a body forming two opposing legs and a third leg. The opposing legs are configured to form a passage for receiving a stab from a panel board. The two opposing legs are biased toward each other, and each of the opposing legs has a convex surface facing the passageway for engaging and maintaining alignment of the stab. A fixed contact is attached to the third leg. The fixed contact connects to a moveable contact of a circuit breaker. An arc runner is connected to the third leg and at least partially encloses a perimeter of the fixed contact.

The invention provides a multi-breakpoint circuit breaker. A preset connection mode is adopted, at least a pair of fixed contacts are arranged in a base, at least two sets of fixed contacts corresponding to two sets of movable contacts opposite to the flow direction of current are arranged on the pair of the static contacts, and one set of fixed contacts correspond to one arc extinguishing chamber, a plurality of breakpoints are connected in series in the base of the circuit breaker, so that users do not need to wire outside a wiring terminal for connecting the breakpoints in series. Long time-delay characteristics are also set in the preset wiring mode, so that the motion characteristics of the multi-breakpoint circuit breaker cannot be affected when the multi-breakpoint circuit breaker is used by the users.

The invention discloses a contact system of a low-voltage switch device, such as, a circuit breaker, the contact system utilizes the principle of combining the electromagnetic repulsive force and the gas pressure, a structure with a moving contact and a static contact which can simultaneously swing and be repulsed and an automatic magnetic blow-out system, thus being able to accelerate the breaking speed between the moving contact and the static contact, widen the repulsion distance between the moving contact and the static contact, accelerate the arc extinguishment and further enhance the performance indicators for rapid flow limit and arc extinguishment. The contact system of the invention has compact structure, small volume and low production cost.

The invention discloses a contact structure for a low-current molded case low-voltage circuit breaker. A static conducting rod is positioned at the front-lower part of a movable contact; a static contact is positioned between the static conducting rod and the movable contact; a U-shaped lug boss of which the width is smaller than that of the static conducting rod is bent at the rearmost part of the static conducting rod in an extending manner facing to the opposite direction of current; the orientation of an opening of the U-shaped lug boss is opposite to the direction of the rearmost part current of the static conducting rod; a static contact is fixedly connected onto the U-shaped lug boss; the front end face of the U-shaped lug boss forwards extends at the same width to form a static arc striking sheet which is obliquely bent towards the direction of the movable contact and is abutted together; a distance is reserved between the static arc striking sheet and the static contact; U-shaped magnetism-increasing blocks are formed by eudipleurally upwards extending from the tail of the static conducting rod; four different functions of increasing the resistance of the circuit breaker, enhancing a self-excitation magnetic field in a contact region, absorbing an electric arc generated on the static contact during repelling open of the static contact and forming an electric repelling force between the movable contact and the static contact are achieved by one integral member; and the performance of the circuit breaker is increased.

A moving contact on circuit breakers belongs to the technical field of low-voltage electric appliance, and includes: an insulated support, a pair of fixing plate, a grid base, a group of grids, a rotary supporting shaft, a group of parallel conductors, a flexible conductive connection wire, and a conducting block. The invention is characterized in that the invention includes a fixing support, which is arranged on the insulating support and grid base along with a group of parallel conductors; one of the parallel conductors should be in the fixing support and at the same position as other conductors. The group of grids is arranged on the grid base or the insulated support. The invention can lower the temperature rise of the moving contact and static contact in short circuit, lift the short-time withstand current value of the breaker; keep the small size of moving contact so as to control the overall cubage of the breaker; and the fixing support is simple in structure and convenient in installation, thus being economical and practical industriously.

The invention provides a multi-break circuit breaker. A preset connecting mode is adopted. In an insulating shell, every two adjacent groups of movable contacts are connected by a conductor, or a group of movable contacts and static contacts corresponding to the adjacent group of movable contacts are connected by another conductor; after connection in any mode, poles which are provided with at least two breaks connected in series and are homopolar and cophasal are formed; and two groups of movable contacts can rotate independently relative to an insulating rotary shaft. A plurality of breakpoints are connected in series in the circuit breaker shell, and a user does not need to connect wires at wiring terminals independently in order to connect the breaks in series. The long time-delay characteristic also is set under the mode of preset connecting wires, and the acting characteristic of the multi-break circuit breaker is not influenced when the multi-break circuit breaker is used by the user.

Contactor-circuit breaker comprising a control electromagnet and a protection device both capable of acting on mobile contacts in response respectively to a deliberate control and to a detected electrical fault, through a multi-pole device. An electromagnetic tripping device (41) is added onto a contact control mechanism (40). The protection device (30), preferably interchangeable, is connected to the electromagnet (20) through a control line (33B) and to the control mechanism (40) through a trip line (33A) so that it outputs an electrical power supply to the electromagnet on the control line, and in the case of a fault, a trip signal on the trip line. The electromagnet (20) is of the DC type, and the protection device (30) adapts its power supply voltage.

A circuit breaker contact assembly includes a line conductor having a folded back fixed contact end, a fixed contact mounted on the contact end, and a movable contact arm having an inner edge and first and second ends. A movable contact is mounted on the first end. The movable contact arm is pivotable about the second end between a closed position in which the inner edge extends adjacent the contact end with the movable contact in contact with the fixed contact to form a reverse current loop, and an open position in which the movable contact is pivoted away from the fixed contact. The contact arm includes a first inner longitudinal member extending along the inner edge and a second outer longitudinal member. The first inner longitudinal member has a higher electrical conductivity than the second outer longitudinal member, which has a higher shear strength and a lower specific density.

A contactor assembly for a circuit breaker comprises a first spring supporting pin, a cam plate, a second spring supporting plate, a link, and a spring. When a movable contactor is rotated without a rotation axis, a fluctuation of a rotation center of the movable contactor is not generated and a current limiting function is fast performed. Also, after contacts are separated from each other, the movable contactor is prevented from returning towards fixed contactors and the separated position is maintained for a predetermined time. An assembly process of the contactor assembly is simplified.

The invention relates to a swinging-arm three-pole on-off device of an earth leakage protective socket, which belongs to the technical field of protective devices of low-voltage electrical apparatus, and comprises a base, a contact mechanism which is formed by a ground wire contact pair, a live conductor contact pair and a neutral conductor contact pair, a circuit board, an electromagnetic trip drive mechanism, a trip mechanism and a reset push button. The invention is characterized by further comprising a swing frame which is arranged on the base, the swing frame is connected with the trip mechanism, and one side of one end of the swing frame is corresponding to and matched with the live conductor contact, and the other side is corresponding to and matched with the neutral conductor contactor, and the middle portion of the other end of the swing arm is corresponding to and matched with a ground wire contact. The invention has the advantages that the swinging-arm three-pole on-off device can achieve the interlocked closing and disconnecting of a ground wire, a live conductor and a neutral conductor, and the ground wire contact can be closed before the live conductor contact and the neutral conductor contact when in closing, and the live conductor contact and the neutral conductor contact are disconnected before the ground wire contact when in breaking, and the swinging-arm three-pole on-off device is beneficial for fully playing the function of protecting electric apparatus and personal safety.

The invention discloses a small molded case circuit breaker adopting co-directional serial double breakpoints, which comprises an operating mechanism, a contact device, an energy storage device, and acaging device. The energy storage device comprises a contact surface formed on a supporting part, a driving finger which is matched with the contact surface and co-directionally moves along with a handle of the operating mechanism, and an energy storage spring connected between a lever of the operating mechanism and a moving contact. The caging device comprises two bosses corresponding to two moving contact points of the moving contact respectively, and two surfaces which are formed on the lever of the operating mechanism and are matched with the two bosses respectively, and has the functionsof strengthening the uniformity of contact pressure of two breakpoints and the synchronous closing / breaking adaptability, so that the caging device can still keep reliable work under the condition ofinconsistent wear of contacts of the two breakpoints. The energy storage device and the caging device are non-independent devices, so a mechanism is greatly simplified, the space of the mechanism isreduced, the external dimension of a circuit breaker product fully meets the modular standard requirement and the volume is smarter.

The present invention relates to a circuit breaker. The circuit breaker is composed of a right and left parallel configured first and second fixed contact, rotary type bridging type movable contacts providing movable connection points on a U-shaped arm, and gate arc-control devices respectively corresponding configured with the first and second fixed contacts. In a two-point disconnecting mode circuit-breaking switch loading these components in a unit assembling frame body, a U-shaped magnet yoke surrounding a connection point section of fixed contacts from right and left, and the side edge section of the U-shaped magnet yoke can stand along the broken circuit moving path of the movable contacts; an insulating barrier and a yoke cover made from insulation materials are provided in the unit assembling frame body, the insulating barrier is inserted between fixed contacts and extends along the broken circuit moving path of the movable contacts; the yoke covers are provided on the right and left sides of the insulating barrier, covers the right and left side edge sections of the magnet yoke from inner side, and are insulated from the fixed contacts; and an electric arc converter board is provided on the upper segment of the arc-control device spanning the right and left arc-extinguishing chambers.

The invention relates to an improved circuit breaker, comprising a casing, a circuit protection actuating mechanism, a traveling contact, a stationary contact, an arc extinguisher and a disengaging mechanism, wherein the circuit protection actuating mechanism is positioned in the casing; the traveling contact is matched with the stationary contact; the disengaging mechanism comprises a disengagingrotor and a drive component to drive the disengaging rotor to rotate, and the traveling contact is arranged on the disengaging rotor; a buckling mechanism is arranged on the disengaging rotor; the drive component cooperates with the buckling mechanism to control the buckling mechanism to buckle or disengage; and the circuit protection actuating mechanism cooperates with the buckling mechanism todrive the buckling mechanism to disengage. The design of the buckling mechanism in the invention separates the disengaging force from the contact pressure, and therefore, no matter how high the contact pressure is, the disengaging force can not increase all along, so that the pressure between the contacts can meet the requirements for the circuit breaker in a circuit environment with different current magnitudes; the disengaging force of the disengaging mechanism can not change, the sensitivity of the circuit breaker can not be affected, and the circuit breaker has a wider universality; and the whole circuit breaker has the advantages of convenient installation and simple structure.

The invention relates to a contact system of a low-voltage circuit breaker. In the contact system, a first sliding shaft is a hollow tube, the connecting ends matched with the first sliding shaft, of a first spring and a second spring separately form a rotating supporting shaft; the both ends of the first sliding shaft are sleeved on the rotating supporting shafts respectively to constitute hinged connections; and the first sliding shaft fits with the first cam-shaped surface of the main body in a rolling friction manner. As the sliding shaft is hinged with the first spring and the second spring, the sliding shaft can rotate along the rotating supporting shaft; when the moving contact moves, the sliding shaft does not perform rigid friction, but rolling friction with the moving contact and the contact force is small, thus the rolling time is greatly shortened, namely the rejection time of the moving contact is shortened; and as the wear problem does not exist, the service life of the sliding shaft can be prolonged and the service life of the entire contact system is increased.

The invention relates to a super voltage circuit break quadruple speed section contact used in power device. It designs the fixed contact into connecting the spring with the insulating case; the fixed contact moves with the moving contact on the force of friction and extends the spring, the fixed contact moves to the dead point and suddenly separates the moving contact and generates the opposite speed moving with the moving contact.

The invention discloses a novel earth leakage protection socket which is characterized in that the output terminals of a live conductor and a zero conductor of a power source are respectively providedwith two static contacts; two springs are sleeved on a reset guide pole, wherein one spring is a reset spring, and the other spring is a fast trip spring; and an analog leakage current generating switch and a reset start switch are arranged below a release. The invention has the advantages of long service life and stable, reliable and safe operation and has the functions of automatically detecting end of life and preventing lighting strike.

The invention discloses an integrated contact arc extinguishing system with movable fixed contact, which is used for a moulded case low voltage circuit breaker and comprises a movable fixed contact, a conductive copper bar, an arc extinguishing grid group and insulated casings, wherein the insulated casings are positioned at two sides of the conductive copper bar and between two sides of the movable fixed contact, the movable fixed contact is arranged between two reversed-U-shaped sides of the conductive copper bar, and a pin shaft is connected with the conductive copper bar and the movable fixed contact in a penetrative way; two ends of a spring are fixed to two ends of the pin shaft and placed inside corresponding grooves on the movable fixed contact; the pin shaft is connected with the movable fixed contact in an interval-penetrative way, inner sides of the insulated casings are symmetrically provided with a limit groove respectively and two ends of the pin shaft are positioned inside the limit grooves; with the fixed contact being movable, the integrated contact arc extinguishing system enhances the speed of separating movable moving contact from movable fixed contact and improves the breaking ability of the circuit breaker; and with the arc extinguishing system being modularized, the airtightness of fixed contact arc extinguishing components is raised and the installation for the arc extinguishing grid group is simplified.

The invention discloses a reclosing device of a prepayment breaker. The reclosing device comprises a shell and a cover. The shell is internally provided with a sliding switch, a junction device, a handle device and a driving device for controlling turning off and turning on of the sliding switch. The sliding switch comprises a fixed contact sheet, a movable contact sheet and a sector-shaped transmission sheet. The circle center of the sector-shaped transmission sheet is rotationally arranged on the inner wall of the shell. The movable contact sheet is in an arc shape and is arranged along the outer arc edge of the sector-shaped transmission sheet. The section, close to the movable contact sheet, of the fixed contact sheet is a fixed contact sheet arc part which is provided with a fixed contact sheet notch dividing the fixed contact sheet into two parts. The movable contact sheet is tightly attached to the fixed contact sheet arc part. The side, close to the handle device, of the sector-shaped transmission sheet is provided with a transmission wheel tooth. The driving device comprises a sector-shaped gear sheet and a driving motor. According to the reclosing device, by means of the cooperation between the movable contact sheet and the fixed contact sheet arc part, the turning on of the sliding switch arranged in the N electrode is earlier than that of a switch in the P electrode of the breaker, turning off of the sliding switch in the N electrode is later than that of the switch in the P electrode of the breaker, and non-arc turning off of the N electrode can be achieved.

The invention discloses a control and protection switch which comprises a shell which is internally provided with a contactor unit for realizing automatic control, an operation unit for manually controlling switch-on and switch-off, and a contact unit which communicates with a circuit. The contactor unit comprises a moving iron core and an electromagnet. The operation unit comprises a driving member and a support member. The contact unit comprises a moving contact, a static contact and a reset spring. The control and protection switch is characterized in that one end of the driving member and the moving iron core are in linkage, the other end is connected to the support member, the supporting member is provided with a cavity with openings at two ends, the moving contact goes through the cavity which is close to the side of the driving member and presses against the moving contact, the reset spring is installed between the side wall of the cavity far from the driving member and the moving contact, and a barrier plate is arranged between the moving contact and the reset spring. The invention aims to provide the control and protection switch with close fit of moving and static contacts, rapid separation, low temperature rise, and long service life.

A circuit breaker is disclosed, in particular for low voltages, with moving and fixed contacts, a switching shaft and a contact lever. The contact lever is rotatably mounted on or in the switching shaft, and includes a free end that extends from the switching shaft, carries the contact piece of the moving contact on one side of its external contour and has a first depression on the other opposite side of the external contour for engaging a bolt. In at least one embodiment, the contact lever is subjected to a torsional moment in the closing direction by means of the bolt in each case. To ensure opening, it is proposed that a second depression be provided at a distance from the first depression, that a slot-shaped recess be formed on the switching shaft, that the contact lever, in the event of a trip, moves the bolt towards the side wall of the recess which lies in the direction of movement, which pushes the bolt out of the first depression into the second depression, the depth of which is such that the bolt lies on the bottom of the recess, which rises radially in the closing direction in such a way that a counter force must be overcome in order to rotate the contact lever in the closing direction.

A moving contact assembly of a molded case circuit breaker comprises a rotary shaft rod, a moving contact, a pair of connecting rods and a pair of springs, wherein the rotary shaft is provided with an opening and a pair of symmetrically arranged arc-shaped linear movement guide grooves; the moving contact is rotationally connected with the rotary shaft rod through a rotary shaft; the two ends of the moving contact lean out of the opening of the rotary shaft rod; the two ends are respectively provided with a moving contact; the pair of connecting rods are symmetrically arranged; one end of each connecting rod is connected with the two side surfaces of the moving contact while the other end is connected with a sliding pin, wherein the two ends of the sliding pin pass through the arc-shaped linear movement guide groove and span the two side surfaces of the rotary shaft rod; and the pair of springs are symmetrically arranged on the two side surfaces of the rotary shaft rod; the two ends of the pair of springs are respectively connected with the two sliding pins. Compared with the prior art, the moving contact assembly of a molded case circuit breaker provided by the present invention can rapidly finish circuit transformation with high efficiency.

The invention discloses a movable static contact structure for a plastic-shell circuit breaker. The back parts of a static contact plastic piece and a static contact are connected with a plastic bracket through a static contact rotating shaft; the plastic bracket is fixedly connected with a connecting bar; a spring is arranged between the back part of the static contact and the plastic bracket; acopper braided wire is connected between the connecting bar and the static contact; the back part of the static contact plastic piece is provided with two fan-shaped bosses which have fan-shaped sections and are bilaterally symmetric to the static contact; first through holes formed in the middles of the two fan-shaped bosses are coaxial with a third through hole formed on the back part of the static contact; the static contact rotating shaft passes through the first through holes and the third through hole, and the two ends of the static contact rotating shaft are connected with the plastic bracket; a first cavity is formed at the middle position of the plastic bracket; the back part of the plastic bracket is provided with a second cavity; the copper braided wire is arranged in the firstcavity; and the spring and the back parts of the static contact plastic piece and the static contact are accommodated in the second cavity. In the breaking process of a circuit breaker, electric arcsare prevented from burning the contact and metal particles produced by an arc chute are prevented from sputtering towards the back part of the static contact, so that the static contact structure is more reliable.

A shield is provided for a circuit breaker including a housing, a movable contact, a stationary contact, and an operating mechanism for moving the movable contact into and out of electrical contact with the stationary contact. The operating mechanism includes a crossbar, a biasing member, and a movable contact assembly. The movable contact assembly has a movable contact arm pivotably coupled to the crossbar, and includes a first end carrying the movable contact, and a second end biased by the biasing member, thereby biasing the movable contact toward the stationary contact. The shield comprises an elongated barrier element having an opening which receives the movable contact arm. The elongated barrier element is coupled to the operating mechanism crossbar proximate the second end of the movable contact arm in order to shield at least the biasing member. A movable contact assembly, and electrical switching apparatus are also provided.

Disclosed is a movable contactor assembly of a circuit breaker capable of enhancing a current limiting function by maintaining a contact state between a movable contactor and fixed contactors in a closed circuit state, by preventing the separated movable contactor from returning towards the fixed contactors at the time of a current limiting operation, by accelerating a separation operation of the movable contactor from the fixed contactors at the time of a current limiting operation, and by continuously maintaining a separated state of the movable contactor from the fixed contactors until a trip operation is performed by a trip mechanism.

A crossbar assist mechanism is for a circuit breaker including a housing, a movable contact, a stationary contact, and an operating mechanism. The operating mechanism includes a crossbar, a carrier coupled to the crossbar, and a movable contact arm which is pivotably cooperable with the carrier. The movable contact is disposed on the movable contact arm. The crossbar moves the carrier and the movable contact arm, thereby moving the movable contact into and out of electrical contact with the stationary contact. The crossbar assist mechanism includes an electrically conductive member electrically interconnecting the carrier and the movable contact arm to a load terminal. A spring disposed between the crossbar and the electrically conductive member biases the crossbar from a first position corresponding to the movable contact and the stationary contact being separated, toward a second position corresponding to the movable contact being in electrical contact with the stationary contact.