146results about "Switch terminals/connections" patented technology

A grounding fault circuit interrupter (GFCI), including a housing, a trip means, a pair of static contact pieces fixed on the housing, a pair of load contact pieces fixed on the housing, a pair of slide frames, a pair of movable contact pieces fixed on the slide frames respectively, which is resiliently movable, said trip means including a trip coil, a plunger provided in the trip coil, a trip spring abutted against the plunger, a balance frame, a latch, a reset pull rod, wherein said plunger is provided with an annular groove, the plunger movably connected to the latch through the annular groove, wherein the latch has an arc-shaped opening thereon and is movably provided on the balance frame, said balance frame having two wedge sides, the wedge sides in contact with the slide frames; wherein when the reset pull rod is connected with the latch, the static contact pieces are in contact with the movable contact pieces. The grounding fault circuit interrupter has a reverse wiring protection function, the receptacle inlet openings in the face portion of which will not be energized when it's reverse wired.

A modular terminal for a molded case circuit breaker by which various types of terminals can be joined together and configuration and assembly are simplified, the modular terminal comprising a plurality of terminal bases each of which is provided for each phase, a terminal which is detachably supported at each terminal base, and a joint piece which connects a pair of the terminal bases adjacent to each other to form a terminal module.

A plug-in unit includes a breaker electrically connected with a busbar at a power supply side and an electric device electrically connected with the breaker. Joint surfaces making contact with each other are formed at the breaker and the electric device, respectively. The breaker includes a terminal metal fitting connecting the busbar thereto and a plug-in terminal metal fitting installed at the joint surface of the breaker, and the electric device includes a plug terminal, which is installed at the joint surface thereof and capable of being connected with the plug-in terminal metal fitting. The breaker is detachably joined with the electric device by an engaging member including an engaging unit and an engagement receiving unit. The engaging unit and the engagement receiving unit are installed at the joint surfaces of the breaker and the electric device, respectively, and detachably engaged with each other.

The invention relates to a plug-in base of electrical appliances such as a plastic housing type breaker with various wire-connecting modes and combined functions, etc., comprising a socket component bearing a contact stud of the electrical appliance body, a wire-connecting device connecting inlet-outlet wires and a connecting plate connected with the socket component; various wire-connecting devices at front of the plate and/or at the back of the plate can be connected by the connecting plate in a mode of exchange and selection; the plug-in base is also provided with assembled connecting structure which can combine and assemble the two plug-in bases together, just like a single-stage base and a three-stage base are combined into a four-stage base; the plug-in base is also provided with a structure which is convenient for pulling out the breaker body from the base easily; the plug-in base of the invention has wire-connecting devices which can be configured with different forms in the mode of exchange and selection, and can provide various wire-connecting modes of wire-connection at front of the plate and at the back of the plate with different polarities and different directions for users.

The invention relates to a small circuit breaker for plug-in installation, which consists of two small single-pole circuit breakers and a wiring base, wherein the two small single-pole circuit breakers are in assembly connection in parallel through rivets; the upper part and the lower part of the back lateral surface of any small single-pole circuit breaker are provided with a binding post respectively; the upper part and the lower part of the wiring base are provided with two wiring sleeves at intervals respectively; the binding posts are in nested connection with one wiring sleeve respectively; the wiring base is arranged on a clamping rail of a distribution box; and an upper wiring board and a lower wiring board of the wiring base are connected with a power-supply side connecting wire and a load side connecting wire respectively. When an application circuit generate faults and the small circuit breaker needs to be replaced, the two small parallel single-pole circuit breakers are pulled out of the wiring base directly without cutting off power supply, and after being maintained or replaced, the small single-pole circuit breakers are plugged in the wiring base again; and after the small single-pole circuit breakers leave away the wiring base, handles of the two small single-pole circuit breakers are locked by utilizing a lever mechanism so as to prevent the false operation ofthe handles and power operation.

Provided is a circuit breaker capable of minimizing a change in the structure of, for example, a case even when a material (thermal conductivity) forming a stud is changed.

A stud (20) includes a base portion (21) that is provided in a case (2) and a protruding portion (22) that protrudes from the case (2). The cross-sectional area of the protruding portion (22) is more than that of the base portion (21). When the cross-sectional area of the protruding portion (22) is more than that of the base portion (21) in the stud (20), the thermal conductivity of the protruding portion (22) increases and it is possible to increase the thermal conductivity from the protruding portion (22) to an external conductor connected to the stud. In addition, since the surface area of the protruding portion (22) increases, the amount of heat dissipated from the protruding portion (22) increases. In this case, since the dimensions of the base portion (21) inserted into a stud insertion hole (2b) of the case (2) do not vary, it is not necessary to change the dimensions of the insertion hole (2b) of the case (2). Therefore, it is possible to minimize a change in the structure of a component even when the material forming the stud is changed.

A device for electrical connection of two electrical apparatuses such as an electrical protection apparatus associated to a controlled switch, said device being designed to electrically connect the output terminal(s) of one of the apparatuses, called the first apparatus, to the input terminal(s) of the other of said apparatuses, called the second apparatus, and comprising conductors housed in an insulating cover, the assembly extending along one of the faces of the two apparatuses, said above-mentioned input and output terminals comprising access openings on said faces, characterized in that the insulating cover comprises a flap designed to prevent access to the input terminal(s) of the second apparatus when the connection device is fitted while leaving access to the output terminal(s) of said second apparatus freely.

A circuit breaker includes terminals with screws on a power supply side and a load side disposed at a front end section and a rear end section of a main body case containing a current interrupting unit and a switching mechanism. A terminal cover is detachably attached onto the main body case at a position corresponding to the terminals on at least one of the power supply side and the load side. A terminal cover attaching surface is formed on an upper surface on the power supply side and/or the load side of the main body case. The terminal cover is inserted while sliding on the attaching surface from a front end, so that the terminal cover is attached to the main body case with a snap-fit coupling unit at an assembling position.

The invention provides an inserting terminal device of switch capable of control the contact of the clamping terminal and the switch piece to the minimum limit by a simple structure. The device of the invention is structured by: combining the front ends of the first and second compression joint piece (3a, 3b) mounted on the clamping terminal of the switch on to the switch piece (5a) of the binding post (5) of the terminal seat (2); clamping the switch piece by the compression joint force between the first and second compression joint piece; the clamping terminal is composed by integrating the opposite first and second compression joint piece and the connection piece (3c); and a binding post cover is mounted onto the binding post in the inserting terminal device. The binding post cover comprises: a pair of inserting holes (4b, 4c) positioned to insert the first and second compression joint piece of the clamping terminal; a separating unit (4a) and a switch supporter disposed between the pair of inserting holes.

The invention relates to a hydraulic electromagnetic circuit breaker with high safety, which consists of at least one hydraulic electromagnetic circuit breaker and a base, wherein a junction terminal of the circuit breaker is respectively connected with a plugging terminal, any one of the plugging terminals passes through the rear side surface of a circuit breaker shell, a lever is arranged inside the circuit breaker, the middle part of a installation plate on the rear side surface of the circuit breaker shell is provided with a window hole, one end of the lever is arranged inside the window hole, the lever is connected with a torsional spring, the torsional spring is fixed inside the shell, the rotation route of the other end of the lever is provided with an interlock piece, the interlock piece is connected with the shell through a pin shaft, and the rotation route of one end of the interlock piece passes through a lock catch in the circuit breaker. The base is installed on a card track of a power distribution box through a screw or a trough and a clamping block structure of the rear side. The hydraulic electromagnetic circuit breaker is connected with the base in a plugging way, so when the circuit breaker is not well installed, the contact is disconnected and cannot be closed, the entire circuit stays at an absolute disconnection state when disassembling the circuit breaker main body, and the safety of an operator is ensured.

The residual current device (2; 200) associable to an electric circuit-breaker (1), the residual current device (2;200) comprising: interconnection electric terminals (22) suitable to establish, by co-operating with respective electric terminals of the circuit-breaker (1) that are accessible through a first face (6) of the latter, an electrical connection between the device (2;200) and the electric circuit-breaker (1); and mechanical coupling means (15,16) suitable to allow a mechanical interaction between the device (2;200) and the circuit-breaker (1) through a second face (12) perpendicular to said first face (6). The device (2;200) comprises first (20,21;221) and second (24;220) parts, which are pivotally connected to each other and carry said interconnection electric terminals (22) and said mechanical coupling means (15,16), respectively.

The invention provides a relay terminal device of a circuit breaker, which is externally arranged on the main circuit terminal of the circuit breaker, and is used for externally connecting electric wires with circular crimping terminals, comprising: a box-shaped casing and an upper cover The insulating frame is combined, wherein, the inside of the box-shaped housing is separated by a partition wall, and there are wire insertion holes corresponding to each of the main circuit in the front, and the upper cover is provided with The operation hole of the terminal screw is covered on the top of the box-shaped casing and is detachably locked with it; the terminal board of each phase is fixed and held in the inside of the box-shaped casing, and its rear end protrudes from the casing to the back; And screwed on the terminal board, the circular crimping terminal of the electric wire inserted in the box-shaped housing is clamped between the terminal board and the terminal screw for fixed connection.

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.

The invention relates to a backup protector for a surge protector. A left wiring terminal and a right wiring terminal are connected through a main circuit; the surge protector protects a main electric wire when damage is done; the backup protector further comprises a circuit board module, an electromagnetic switch, a mutual inductor and an electromagnetic release; a resistor, a diode, an inductor and a capacitor are fixed on the circuit board module; furthermore, all are connected with each other in parallel; the main circuit is provided with a movable contact and a static contact; furthermore, the main circuit is set to pass through the mutual inductor; the mutual inductor is connected to the circuit board module; and the electromagnetic switch is arranged between the circuit board module and the electromagnetic release. The backup protector for the surge protector is used with the surge protector in series; therefore, short-circuiting of a main power supply circuit due to the phenomena, such as breakdown, short-circuiting, aging and inferior, because of high current impact of thunder and lightning, and the phenomena, such as a disaster due to fire breakout and a phenomenon that electric equipment cannot normally work due to tripping, can be effectively avoided; security assurance is provided for national defense, industrial and agricultural production, communication, families, works and the like; and the backup protector disclosed by the invention is simple and compact in structure.

The invention discloses a miniature circuit breaker, which mainly solves the abnormal motion caused by the interference between the ejector rod and the movable contact, and can further improve the breaking capacity of the miniature circuit breaker. The miniature circuit breaker includes a yoke secured to a housing, the right end of the yoke is fixedly provided with an iron core, an insulating sleeve is fixed on the outside of the iron core, an excitation coil is wound around the outside of the insulating sleeve, one end of the excitation coil is electrically connected with an incoming wire terminal, the other end of the excitation coil is electrically connected with the static contact, the insulating sleeve is also provided with an armature which is limited to move, the inner side of the iron core is also sleeved with an ejector rod, the iron core and the ejector rod form a sliding fit, the armature is also connected with the ejector rod to move the ejector rod attached to the armaturein the direction of the iron core, the ejector rod is located on the left side of the handle operating mechanism, the ejector rod is separated from the handle operating mechanism by means of a spring, and when an external circuit is short-circuited, the armature overcomes the resistance of the spring and pushes the ejector rod until the ejector rod touches the handle operating mechanism and is tripped.

In a terminal structure of a switch which is arranged in a manner that a terminal conductor 14 with a terminal screw drawn from the inner portion of the casing is disposed at every phase in the terminal portion of a casing formed by the three-divided structure of an upper cover 2, an intermediate cover 3 and a lower cover, and wires inserted into the terminal portion from the outside are respectively fastened by the screws to be coupled to the terminal conductors, the terminal conductors of the respective phases are pressed into the terminal fixing grooves 3b formed at the intermediate cover and fixed to the casing in a manner that the left and right side edges of each of the terminal conductors are pressed into the grooves. The terminal conductor of each phase is surrounded by a side wall 2a and an inter-phase partition wall 2b formed at the upper cover, and the fitting portion of the upper cover and the intermediate cover is defined at a portion lower than the terminal conductors thereby to enlarge the width of a space into which wires are inserted. Further, step portions 3b-1 are formed at portions of the terminal fixing grooves so that two kinds of terminal conductors having different plate thickness can be selectively assembled in the intermediate cover.

The invention discloses a miniature circuit breaker for side face plug-in installation. The circuit breaker consists of two miniature single-pole circuit breakers and a connection base, wherein the two miniature single-pole circuit breakers are connected in parallel with each other in a splicing mode; a groove is formed in the front side face of the connection base; the two miniature single-pole circuit breakers are inserted into the groove; conductive lug plates are arranged in the upper side faces and the lower side faces of the miniature single-pole circuit breakers respectively; connection ports are formed in the upper side face and the lower side face of the connection base respectively; wire frames and wiring boards are arranged in the connection ports respectively; and the wire frames are contacted with the conductive lug plates. When an applied circuit fails and the miniature circuit breaker needs replacing, the miniature single-pole circuit breakers are directly pulled out of the connection base without switching off a power circuit, repaired or replaced and reinserted into the connection base. After the miniature circuit breaker is separated from the connection base, a malfunction preventing mechanism is used for ensuring that switch-on is unavailable and a contact cannot be switched on when the circuit breaker is not fully inserted into the connection base, so that power operation is avoided.