CN100533899C - GFCI receptacle having plug blocking means - Google Patents
GFCI receptacle having plug blocking means Download PDFInfo
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- CN100533899C CN100533899C CNB2004800068121A CN200480006812A CN100533899C CN 100533899 C CN100533899 C CN 100533899C CN B2004800068121 A CNB2004800068121 A CN B2004800068121A CN 200480006812 A CN200480006812 A CN 200480006812A CN 100533899 C CN100533899 C CN 100533899C
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Abstract
A shaped member having at least one window is located within a GFCI protected receptacle and is operated by movement of the contact arm of the GFCI to assume a first position to block at least one plug receiving opening in the receptacle and a second position which locates the window to allow the prong of a plug to freely enter the face of the receptacle. In operation, when the circuit interrupting device goes into a tripped state, the contact arm moves down to open the circuit. The downward movement of the contact arm, acting through a connecting linkage causes the shaped member to move to the first position, that of blocking at least one opening in the face of the receptacle. Resetting the circuit interrupting device by pressing in and then releasing the reset button of the GFCI causes the main contacts in the circuit interrupting device to close by the upward movement of the contact arm. As the contact arm moves up, it moves the connecting linkage to position the window of the shaped member to allow the prongs of a plug to freely enter the openings in the face of the receptacle. GFCI's normally have two separate sets of internally located contacts known as bridge contacts, one set for connecting a load to the source of electricity and a second set for connecting a user accessible load to the source of electricity. In the GFCI here disclosed the bridge contacts have been eliminated, thus reducing the cost of manufacture by coupling the conductors for both the load and the user accessible load to a single set of contacts.
Description
The cross reference of related application
According to 35 U.S.C119 (e), it is the priority of 60/441,956 U.S. Provisional Patent Application that the application requires to file in January 23, application number in 2003.
Technical field
The present invention relates generally to reducible tripper and system, especially, relates to a kind of device that has been equipped with and protects socket with the new improved ground-fault interrupter (GFCI) that stops plug to be inserted into wherein selectively.
Background technology
Many electric wiring devices have one can be connected to the line scan pickup coil side of power supply, a load end that can be connected to one or more loads and at least one conductive path between described circuit and load end.Be connected electrically to lead that power supply is provided or, can be that the line scan pickup coil side that is positioned at connecton layout is connected with load end to lead to one or more load guide current.Electric wiring device industry has been represented being designed for example appealing of the growth of the tripper of the power supply of household electrical appliance, consumer electronic products, branch circuit etc. or system of interrupt load.Especially, electrical code requires the circuit in Household bathroom, kitchen and the outdoor convenience outlets that ground-fault interrupter (GFCI) is installed.At present available GFCI device, for example United States Patent (USP) of owning together the 4th, 595,894 (' 894) number in the device described, the tripgear that uses electric triggering is with being electrically connected between interrupt line terminal and the load end mechanically.This device by pressing reset button, is reducible owing to for example detecting after earth fault is disconnected.In ' No. 894 patents in the disclosed device, be used to cause that the tripgear that the machinery of circuit (being the conductive path between line scan pickup coil side and the load end) disconnects comprises a solenoid or breaking coil.A testing button that is positioned at the GFCI surface is used to test tripgear and provides circuit to come sense faults.Being electrically connected between the reset button reflex bit line terminal on GFCI surface and load end is provided.
Yet such example may occur: for example Lei Ji abnormal conditions not only may cause causing the unexpected increase of the electric current of device tripping operation, and can cause the tripgear that is used for interrupt circuit among the GFCI to become unavailable.This may take place under the unwitting situation of user.In this case, in the face of the GFCI of tripping operation, the user who does not discover may push reset button, and this will cause to reset one to have the device of inoperative tripgear and do not have available earth fault protection conversely.
And, the neutral state of the disconnection of defined in Underwriter Laboratories Inc. (UL) standard P AG 943A, may be present in to this GFCI device provides in the electric wire of power supply.If the neutral state that disconnects is present in the neutral line on circuit (with respect to the load) end of GFCI device, such example may occur: phase (or fire) line from power supply is provided to the GFCI device produces current path by load end and the people who installs to ground.Under the situation that the neutral state that disconnects exists, the GFCI equipment that can reset and trip is even can keep the neutral state that disconnects.
Merged the United States Patent (USP) of owning together the 6th of full content by reference at this, 040, the reducible tripper of gang has been described for No. 967, if wherein the ifs circuit interrupt unit is disabled or has the neutral state that disconnects, described tripper can lock the part that resets of this device.Except circuit was connected (for example terminal screw) with load end, tripper had the load end of a user-accessible to connect usually, for example GFCI protection socket.The load end gang socket of user-accessible can be used for electrical equipment for example baking box etc. the power supply that provides from line scan pickup coil side is provided.Load end connects and socket normally is electrically connected together.As noted, this device is connected to outer lead so that line conductor is connected to line scan pickup coil side to be connected, and the load end lead is connected to the load end connection.Yet such situation may take place: tripper is connected to outer lead improperly, and line scan pickup coil side connects and line conductor is connected to the load connection to such an extent as to load wire is connected to.Be called as the exchange of the carelessness of lead between the circuit of reverse wiring and the load terminal, make plug engagement receptacle contact and to ignore GFCI not protected.This mistake is routed in as yet not that to provide in the new construction of power supply to branch circuit be ubiquitous, and electrician/setter is difficult to recognize between line side wires and load end lead.Be reversed at tripper under the situation of wiring, possibly can't protect the load of user-accessible to connect, even keeping error protection the load end connection.
A kind of comprise reverse wiring protection and be included in alternatively distribute to identical assignee and merged the United States Patent (USP) 6 of full content by reference at this; 246; the resetted tripper of a disclosed independent trip part and/or a reset locking part in 558 (' 558); for example the GFCI device provides the solution to reverse wiring problem.In ' 558, be connected to load end improperly if route to the line scan pickup coil side of device, oppositely the wiring protection be operated in the circuit of device and load end on the two so that error protection to be provided.Described tripping operation part is independent of the circuit interruption that the is electrically connected part in the one or more conductive paths that are used for interrupting described device and works.If the ifs circuit interrupt unit is disabled or the neutral state that exist to disconnect, described reset locking partly stops being electrically connected of the conductive path that rebulids disconnection.Although the disconnection of disclosed circuit provides protection in ' 558, still wish to have the retention device that inserts plug in the socket of the GFCI of a kind of user of prevention in being in malfunction, because it will provide better safety measure.
Summary of the invention
In one embodiment, tripper comprises a phase between circuit and load end and a neutral conductive path that is placed at least in part within the shell.The phase conductive path ends at and can be electrically connected to first of current source and connect, can connect and can be to the 3rd being connected that at least one user accessible load is conducted electricity by socket to second of at least one load conduction.Similarly, neutral conductive path ends at and can be electrically connected to first of current source and connect, can provide neutral second connecting and can provide neutral the 3rd connection that is connected at least one user accessible load by socket of connecting at least one load.Described first and second connections can be screw terminals.
Tripper also comprises a circuit interruption part that is placed within the shell, and it is configured to according to the generation of predetermined condition and causes outage among one of the phase between described line scan pickup coil side and described load end and neutral conductive path or both.One is configured by pressing the part that resets that the reset button that is placed at least in part within the shell triggers, is electrically connected in the conductive path that disconnects, to rebulid.
Tripper also comprises a reset locking, under situation about can't correctly work in the circuit interruption part, stops to rebulid in phase or neutral conductive path or this two kinds of conductive paths to be electrically connected.Pressing of reset button causes that at least a portion phase conductive path contacts at least one reset contact.When connecting between phase conductive path and at least one reset contact, the circuits for triggering interrupt unit is with forbidding reset locking part and allow to rebulid being electrically connected in phase and neutral conductive path.
Tripper comprises that also is independent of the circuit interruption part and the part that resets of work.This part that resets is placed within the shell at least in part, and it is configured with the running that is independent of circuit interruption part causes mutually and/or the electrical breaks in the neutral conductive path.This reset portion branch comprises a trip actuator, for example the contact arm that can be positioned within the shell and extend out from trip actuator from the button of the external reference of receptacle face and.Contact arm is configured so that when resetting, help the machinery that is electrically connected in phase and/or neutral conductive path to disconnect.
Operate a barrier element that is positioned within the jack housing by the motion of contact arm, with be arranged in primary importance be blocked in each plug that can be held by socket socket at least one pin receiver hole and allow plug freely to enter the second place of receptacle face.When tripper entered tripped condition, trip arm moved down with open circuit.Moving downward of the described trip arm that works by an interfering cantalever element causes that barrier element moves to the primary importance that stops at least one plug receiver hole on the receptacle face.Discharge the reset button tripper that resets then by pressing, cause main contact in the tripper by promoting trip arm closure.Along with trip arm moves up, it is promoting cantalever element, and it makes barrier element be positioned at the second place that allows plug freely to enter the opening on the receptacle face.
The invention provides a kind of tripper, it comprises: a shell; Be placed in a phase conductive path and a neutral conductive path between a line scan pickup coil side and load end within the described shell separately at least in part, described phase conductive path ends at first connection that can be electrically connected to power supply, can connect and can be connected to second of at least one load conduction, and described neutral conductive path ends at the 4th connection that can be electrically connected to power supply to the 3rd of at least one user accessible load conduction, can neutral the 5th connection that connects be provided and can provide neutral the 6th connection that is connected to described at least one load to described at least one user accessible load; A circuit interruption part is placed within the described shell and is configured to generation according to predetermined state, causes described phase conductive path between described line scan pickup coil side and described load end and the electrical breaks in the neutral conductive path; The part that resets is placed within the described shell at least in part and is configured to rebulid in described phase conductive path and neutral conductive path and is electrically connected; Described circuit interruption part further comprises a reset locking part, if if if described circuit interruption partly be the disabled neutral state that exist to disconnect or have reverse wiring situation, then described reset locking partly stops to rebulid in described phase conductive path and neutral conductive path and is electrically connected, and wherein said reset portion branch comprises: a reset button; At least one reset contact, the at least a portion that can contact described phase conductive path when its this at least one reset contact is pressed is to cause described predetermined state, if wherein described circuit interruption partly is available, triggering described circuit interruption part is electrically connected to forbid described reset locking part and to be convenient to rebulid in described phase conductive path and neutral conductive path, if and wherein described circuit interruption partly is disabled, described reset locking part still keeps being enabled being electrically connected so that stop to rebulid in described phase conductive path and neutral conductive path; And one be positioned within the described shell, partly controlled partly to be disabled, as to have disconnection neutral state in circuit interruption or to stop that the described the 3rd connects the element of the shaping that is connected to a user accessible load when having reverse wiring situation by described circuit interruption.
The present invention also provides another kind of tripper, and it comprises: a shell; A first electrically conductive path that is placed within the described shell at least in part and ends at first connection, described first connection can be electrically connected to power supply; A second electrically conductive path that is placed within the described shell at least in part and ends at second connection, when being electrically connected between the described first and second electrically conductive paths connected, described second connection can be electrically connected at least one load; The 3rd an electrically conductive path that is placed within the described shell at least in part and ends at the 3rd connection, when being electrically connected between the described first and the 3rd electrically conductive path connected, the described the 3rd connected the load that can be electrically connected at least one user-accessible; A circuit interruption part is placed within the described shell and is configured to generation according to predetermined state, interrupts being electrically connected between the described first and second electrically conductive paths and between the described first and the 3rd electrically conductive path; The part that resets is placed within the described shell at least in part and is configured to turn on being electrically connected between the described first and second electrically conductive paths and between the described first and the 3rd electrically conductive path; If described tripper further comprises when a described circuit interruption part is unavailable, stop and connect between the described first and second electrically conductive paths and the reset locking part that is electrically connected between the described first and the 3rd electrically conductive path; Wherein said reset portion branch comprises: a reset button; At least one reset contact, when being pressed, its this at least one reset contact can contact at least a portion of one of described first or second electrically conductive path to cause described predetermined state, if wherein described circuit interruption partly is available, trigger described circuit interruption part to forbid described reset locking part and to be convenient to connect being electrically connected between the described first and second electrically conductive paths and between the described first and the 3rd electrically conductive path, if and wherein described circuit interruption partly is disabled, described reset locking part still is enabled so that stops between the described first and second electrically conductive paths of connection and being electrically connected between the described first and the 3rd electrically conductive path; And the element that is shaped, it has at least one window that is connected to described circuit interruption part, connects the load that is connected to a user-accessible to stop the 3rd when described predetermined state takes place.
The present invention also provides another kind of tripper, and it comprises: a shell; A first electrically conductive path that is placed within the described shell at least in part and ends at first connection, described first connection can be electrically connected to power supply; A second electrically conductive path that is placed within the described shell at least in part and ends at second connection, when being electrically connected between the described first and second electrically conductive paths connected, described second connection can be electrically connected at least one load; The 3rd an electrically conductive path that is placed within the described shell at least in part and ends at the 3rd connection, when being electrically connected between the described first and second electrically conductive paths connected, the described the 3rd connected the load that is electrically connected to the second electrically conductive path and can be electrically connected at least one user-accessible; A circuit interruption part is placed within the described shell and is configured to generation according to predetermined state, interrupts from described first to described second and being electrically connected of the 3rd electrically conductive path; The part that resets is placed within the described shell at least in part and is configured to connect from described first to described second and/or being electrically connected of the 3rd electrically conductive path; If described tripper further comprises when a described circuit interruption part is unavailable, stop the reset locking part that is electrically connected of connection from described first to described second and the 3rd electrically conductive path; Wherein said reset portion branch comprises: a reset button; At least one reset contact, when being pressed, its this at least one reset contact can contact described first, at least a portion of one of the second or the 3rd electrically conductive path is to cause described predetermined state, if wherein described circuit interruption partly is available, trigger described circuit interruption part to forbid described reset locking part and to be convenient to connect from described first to described second and being electrically connected of the 3rd electrically conductive path, if and wherein described circuit interruption partly is disabled, described reset locking part still is enabled so that stops being electrically connected of connection from described first to described second and the 3rd electrically conductive path; And the element that is shaped, when being electrically connected between the first and the 3rd electrically conductive path was disconnected, it was connected to described tripper to stop that the described the 3rd connects the load that is connected to a user-accessible.
The present invention also provides another kind of tripper, and it comprises: canning; The first electrically conductive access device is used for conducting electricity within described canning and can being connected electrically to power supply; The second electrically conductive access device is used for conducting electricity within described canning, and when turning on being electrically connected between the described first and second electrically conductive access devices, can be connected electrically at least one load; The 3rd electrically conductive access device is used for conducting electricity within described canning, and when turning on being electrically connected between the described first and the 3rd electrically conductive access device, can be connected electrically to the load of at least one user-accessible; Be placed in the circuit interruption device within the described canning, be used for generation, interrupt from described first to described second and being electrically connected of the 3rd electrically conductive access device according to predetermined state; Be placed in the resetting means within the described canning at least in part, be used to rebulid from described first to described second and being electrically connected of the 3rd electrically conductive access device; Wherein said resetting means comprises: a reset button; Reset contact device with described reset button can be operatively connected is used for when pressing described reset button, by causing described predetermined state, triggers described circuit interruption device; And the element that is shaped, it is connected to described circuit interruption device, is connected to the load of described at least one user-accessible to stop the 3rd electrically conductive access device between the emergence period at predetermined state.
The present invention also provides a kind of circuit interruption system, and it comprises: a power supply; A tripper, its with circuit that is connected to the described tripper that described power supply is connected and load end on error protection is all arranged; Be connected at least one load of described tripper; Wherein said tripper comprises: a shell; Be placed in a phase conductive path and a neutral conductive path between a line scan pickup coil side and load end within the described shell separately at least in part, described phase conductive path ends at first connection that can be electrically connected to power supply, can connect and can be connected to second of at least one load conduction, and described neutral conductive path ends at the 4th connection that can be electrically connected to power supply to the 3rd of at least one user accessible load conduction, can neutral the 5th connection that connects be provided and can provide neutral the 6th connection that is connected to described at least one load to described at least one user accessible load; A circuit interruption part is placed within the described shell and is configured to generation according to predetermined state, causes described conductive path mutually on described line scan pickup coil side and described load end and the electrical breaks in the neutral conductive path; The part that resets is placed within the described shell at least in part and is configured to rebulid in described phase conductive path and neutral conductive path and is electrically connected; If, stop in described phase conductive path and neutral conductive path, to rebulid the reset locking part that is electrically connected when described tripper comprises further that if described circuit interruption part is unavailable or has the neutral state that disconnects; Wherein said reset portion branch comprises: a reset button; At least one reset contact, the at least a portion that can contact described phase conductive path when described this at least one reset contact is pressed is to cause described predetermined state, if wherein described circuit interruption partly is available, triggering described circuit interruption part is electrically connected to forbid described reset locking part and to be convenient to rebulid in described phase conductive path and neutral conductive path, if and wherein described circuit interruption partly is disabled, described reset locking part still is enabled and is electrically connected so that stop to rebulid in described phase conductive path and neutral conductive path; And the element that is shaped, it is connected to described circuit interruption part, if with unavailable at tripper or stop that the 3rd connects the load that is connected to described at least one user-accessible when having the neutral state of disconnection.
Description of drawings
With reference to accompanying drawing, describe the application's first-selected embodiment at this, wherein given similar element similar reference numeral, wherein:
Fig. 1 is the perspective view of the embodiment of a kind of prior art ground fault open circuit (GFCI) device;
Fig. 2 is the end view that the part of the part of GFCI device shown in Figure 1 is represented with the cross section, and its expression GFCI device is in a kind of setting or circuit on-position;
Fig. 3 is the exploded view of inner member of the prior art tripper of Fig. 1;
Fig. 4 is the partial cross section figure of the part of conductive path shown in Figure 3;
Fig. 5 is the schematic diagram of circuit of the grounding fault breaking apparatus of Fig. 1;
Fig. 6 is the schematic diagram that does not have the grounding fault breaking apparatus of bridge contact; And,
Fig. 7 is the part perspective view of the inner member of grounding fault breaking apparatus, has represented the barrier element according to the shaping of the principle of the invention.
Embodiment
The application has considered to interrupt the various types of trippers at least one conductive path of the line scan pickup coil side of device and load end.Conductive path is usually at the line scan pickup coil side that the power supply that provides is provided be connected between the load end of one or more loads separately.The reducible tripper of term includes ground-fault interrupter (GFCI), arc-fault circuit interrupter (AFCI), an immersion that is used to receive the socket of plug and detects circuit breaker (IDCI), electrical leakage circuit breaker (ALCI) and equipment residual current circuit breaker (ELCI).
For purposes of this application; shown in the accompanying drawing and hereinafter described structure that is used for tripper or mechanical device are incorporated in GFCI protection socket (GFCI socket), and described GFCI socket can receive at least one plug and be adapted to be mounted within the single set of connections box that is used for residential electricity wiring system for example.Yet, can be included within any one of the various trippers that reset according to the application's mechanical device.
GFCI socket described here has circuit and load phase (or power supply) connector, circuit and load neutral connector and a plug receiver socket to be used to the providing load of user-accessible to be connected with neutral mutually.These connectors can be for example, external conductor to be fastened or connected to the electric fastener of tripper and conduction.The example of this connector can comprise that terminal screw, lug plate, binding post and outside plug are connected.
In one embodiment, the GFCI socket has the pin of circuit interruption part, the part that resets, a reset locking and a prevention plug when GFCI is in malfunction to enter barrier element in the socket.The circuit interruption described here and the part that resets are used electromechanical element to interrupt (disconnection) and are connected circuit of (closure) described device and the one or more conductive paths between the load end.Yet electronic component is solid-state switch and support circuit for example, can be used for disconnecting and closed conductive path.
Usually, circuit interruption partly is used for the detection according to fault (being earth fault at described embodiment), automatically interrupts being electrically connected in one or more conductive paths (promptly disconnecting conductive path) between circuit and load end.Reset button is used for the closed conductive path that disconnects.By the trip arm that the lift elements between line scan pickup coil side and the load end works that passes through that is connected at least one movable contact arm, trigger and when detecting fault, can be placed the barrier element that enters the opening in the socket with the pin that stops plug.Described reset be used for forbidding reset locking, the closed conductive path that disconnects and reset barrier element to its second or open position be inserted into socket, the exercisable words of ifs circuit to allow plug.Reset and the operation of reset locking part combined circuit interrupt unit and operating, if, then can't rebulid and be electrically connected and at least one opening that barrier element continues to stop socket enters in the socket with the pin of prevention plug to such an extent as to be reversed wiring if the ifs circuit interrupt unit is disabled neutral state and/or the device that exist to disconnect.
The said structure of barrier element that is used for stopping selectively at least one opening of socket can be merged to any reducible tripper, but for simplicity, in this description at the GFCI socket.
Fig. 1,2 and 3 is a kind of as has merged full content by reference and comprised that at this its partial content is to provide the United States Patent (USP) of owning together the 6th to abundant and complete understanding of the present invention disclosed herein at this, disclosed grounding fault breaking apparatus in 246, No. 558.Surface portion 16 has input 20 and 21, is used to receive usually at the normal of the plug of the terminal appreciable the sort of model of lamp or electrical equipment wire component or the pin that polarizes, and the ground pin receiver hole 22 that is used to hold 3-phase plug.Socket comprises that also one is used for socket is fastened to a fixed band 24 on the terminal box.
A testing button 26 that extends out by the opening 28 in the surface portion 16 of shell 12 is used to trigger a test action, and test is placed in the running of the circuit interruption part (or circuit breaker) in the device.The circuit interruption part that will be described in more detail below is used for interrupting in the circuit of device and being electrically connected of the one or more conductive paths between the load end.The reset button 30 of forming the part of the part that resets extends out by the opening 32 in the surface portion 16 of shell 12.Reset button is used to trigger a homing action, is electrically connected to rebulid in the conductive path that disconnects.Be connected electrically to existing family electric wiring and carry out via terminal screw 34 and 36, wherein screw 34 is that input or circuit are connected, and screw 36 is that output or load are connected.Two extra terminal screws are positioned on the opposite side of socket 10.These extra terminal screws provide circuit to be connected with load neutral respectively.At United States Patent (USP) the 4th, 595, a kind of more detailed description of GFCI socket is provided in No. 894, merged its full content by reference at this. Terminal screw 34,36,38 and 40 is the typical types that can be used for providing the terminals that are electrically connected.The example of other type of terminals comprises hold-down screw, pressure clamp, pressure plare, plug-in type connection, lead-out wire and quick linkage flag.
Circuit be connected device 34 and load be connected conductive path between the device 36 be included in contact arm movable between stressed and the unstressed position 50, be placed in travelling contact 52 on the contact arm 50, be fixed to load be connected on 36 or monolithic be formed on load be connected in 36 contact arm 54 and be placed in fixed contact 56 on the contact arm 54.The load of the user-accessible of present embodiment is connected and comprises binding post combination 58, and it has two can mesh the fastening binding post 60 that is inserted in positive formula plug pin wherein.Circuit be connected 34 and the load of the user-accessible conductive path between being connected comprise: contact arm 50, be placed in travelling contact 62 on the contact arm 50, be fixed in the binding post combination 58 or monolithic is formed on the contact arm 64 in the binding post combination 58 and is placed in fixed contact 66 on the contact arm 64.These conductive paths are collectively referred to as the phase conductive path.
Similar to foregoing, the conductive path between property connector 38 and the load neutral connector 40 comprises in the line: between stressed and unstressed position movable contact arm 70, be placed in travelling contact 72 on the contact arm 70, be fixed to load neutral and connect on 40 or monolithic is formed on load neutral and connects the contact arm 74 in 40 and be placed in fixed contact 76 on the contact arm 74.The load neutral of the user-accessible of present embodiment connects and comprises binding post combination 78, and it has two fastening binding posts 80 that can mesh the plug pin that is inserted in wherein.Conductive path between the load neutral connector of property connector 38 and user-accessible comprises in the line: contact arm 70, be fixed in the binding post combination 78 or monolithic is formed on the contact arm 84 in the binding post combination 78 and is placed in fixed contact 86 on the contact arm 84.These conductive paths are collectively referred to as neutral conductive path.
Referring to Fig. 2, circuit interruption partly has a circuit breaker and the circuit that can respond to the fault (for example current unevenness weighing apparatus) on live wire and/or zero line.In the embodiment of GFCI socket, circuit breaker comprises a coil groups 90, a movable core 92 and a baffle plate 94 that is connected to described movable core 92 in response to the energising and the outage of described coil groups.Baffle plate 94 has a pair of banger dogs 96 and 98, itself and movable blocking element 100 interactions that are used for being provided with and resetting and be electrically connected at one or more conductive paths.Sense earth fault in response to the sensor circuit by for example comprising a unbalanced differential transformer of induced current (shown in Fig. 5), come trigger winding group 90.
The reset portion branch comprises reset button 30, is connected to the movable blocking element 100 of described reset button 30, lock pin 102, and when being positioned at trip position, when reset button is pressed, the momentary reset contact 104 and 106 of the common disconnection of temporary transient circuits for triggering interrupt unit.Lock pin 102 is used to mesh the side R of each contact arm 50,70, and pusher arm 50,70 is got back to contact 52,62 contact terminal 56,66 respectively, the stressed position of contact 72,82 difference contact terminals 76,86.
In the embodiment shown in Fig. 2 and 3, reset locking partly comprises lock pin 102, and it meshes the side L of moveable arm 50,70 and moves so that stop moveable arm 50,70 after device is by tripping operation.By stopping the motion of moveable arm 50,70, stop contact 52 and 56, contact 62 and 66, contact 72 and 76 and contact 82 and 86 contact.As an alternative, can only stop one of moveable arm 50 or 70, to such an extent as to stop their contact contacts separately.And in the present embodiment, lock pin 102 contacts to stop contact as a movable interceptor.As an alternative, can use moveable arm 50 and 70 intrinsic biasing to be used as a static interceptor that stops contact to contact.
Referring to Fig. 2, shown GFCI socket is in the position is set, to such an extent as to wherein movable contact arm 50 is positioned at the fixed contact 56 electric engagements of stress travelling contact 52 and contact arm 54.If the sensor circuit of GFCI socket has been sensed earth fault, then closing coil group 90 is with in the movable core 92 pull-in winding groups 90, and baffle plate 94 moves up.Along with baffle plate moves up, pincers 98 bump blocking elements 100 make it rotate with counter clockwise direction around the junction that top margin 112 and inner surface 114 by pin 110 produce before the baffle plate.The motion of blocking element 100 from removing with the engagement place of the side R of the far-end 116 of movable contact arm 50, and allows contact arm 50 to be back to its prestressed state circuit-opening contact 52 and 56 lock pin 102.
After tripping operation, outage coil groups 90, spring 93 is back to its original position of extending with movable core 92, and baffle plate 94 moves to its original position to discharge blocking element 100.At this moment, blocking element 100 is in latched position, and wherein lock pin 102 is forbidden travelling contact 52 engages fixed contacts 56.One of lock pin 102 or both can be used as movable interceptor to stop the contact contact.As an alternative, can use moveable arm 50 and 70 intrinsic biasing as the static interceptor that stops contact to contact.
For the GFCI socket that resets newly is based upon being connected in the phase conductive path so that circuit- closing contacts 52 and 56 is laid equal stress on, reset button 30 is depressed sufficiently overcoming the biasing force of back-moving spring 120, and moves blocking element 100 along the direction of arrow A.Press the side L that reset button 30 causes the movable contact arm 50 of lock pin 102 contact, and press reset button 30 constantly, impel blocking element to overcome by arm 50 applied pressures to cause that reset contact 104 on arm 50 is near reset contact 106.By for example simulating a fault, the closure of reset contact has triggered the running of circuit breaker, baffle plate 94 is with bump blocking element 100 so that movable core 92 moves up, and blocking element 100 rotates lock pin 102, thereby blocking element 100 continues to move towards the direction of arrow A.Therefore, lock pin 102 is raise on the side R of the far-end 116 of movable contact arm 50, on the side L of the far-end 116 of movable contact arm 50.Now contact arm 50 turns back to its unstressed position, break 52 and 56 and contact 62 and 66, and stopping the circuits for triggering interrupt unit, thus outage coil groups 90.
After the operation that triggers circuit breaker, outage coil groups 90, movable core 92 turns back to its original position of extending, and baffle plate 94 discharges blocking element 100 and lock pin 102 is in reset position.Discharge reset button and cause that blocking element 100 and movable contact arm 50 move along the direction of arrow B, up to as shown in Figure 2, contact 52 electric engagement contacts 56.
Referring to Fig. 7, expression be a kind of GFCI, it has a barrier element, is used for can being operated selectively to be blocked in the plug receiver hole of receptacle face when GFCI is in tripped condition.One end of the lift elements 200 that will make by insulating material by rivet etc. in position for example position E be connected to securely on the movable contact arm 50 (referring to Fig. 3), and its other end is connected to trip arm 202.The apical support of trip arm a projection 204, and its bending has the U-shaped element of two stopper gates 208,210 to provide a downward-sloping surface to slidably mate one.The U-shaped element is within the shell of socket, between surface portion 16 and central body 14, and can freely slidably reciprocate to allow opening in the gate to align with in the opening 20,21,22 at least one or not line up.The spring 212 that is positioned within the receiver hole 214 impels the U-shaped element and the downward inclined surface of projection 204 to mesh.Each barrier element 208,210 all has 214,216 and barriers 218,220 of a window, wherein place described barrier with in the pin receiver hole 20,21,22 that stops each plug at trip arm in the bottom during the X of position at least one; And place described window to aim at the pin of plug and to allow the pin of plug to insert in the socket.
Referring to Fig. 1, (represented with the dotted outline in the plug stop position) U-shaped barrier element 206 is made up of insulating material, and be positioned within the adjacent socket main body after the surface portion of shell 12, and place barrier element 208,210 to occupy primary importance to stop for example opening 21 in the socket of at least one opening, perhaps to occupy that the second place that is arranged in window 214,216 is to aim at the opening 21 of socket.Between the plug receiver hole and the top of the electric terminal relevant of U-shaped element in receptacle face part with described hole.Get back to Fig. 7, the end 204 of trip arm 202 has an angled section, the edge that is positioned at the center 222 of its U-shaped element 206 that slidably mates.Be connected to the trip arm 202 of contact arm, when contact arm moves up, be moved upward, and when contact arm moves down, be moved downward, (and it placed angled section 212 and the planar cross-sectional 214 that in turn meshes cantalever element 200 with the edge of the free end 116 that allows contact arm 50.) so arrange angled section 212 and U-shaped element 206 to be positioned at the geometry at the edge 222 at center, and their positions each other, when not being in malfunction with convenient GFCI, contact arm 50 makes trip arm 202 be positioned at its top position Z; And when GFCI was in malfunction, contact arm 50 made trip arm 202 be positioned at its lower position X.Like this, when GFCI was not in malfunction, contact arm 50 was positioned at its top position (referring to Fig. 2), and this makes trip arm be positioned at the position Z of its rising.During that be positioned at its rising when trip arm or top position, head on the power of spring 212, mobile U-shaped element 206 and barrier element are so that the pin receiver hole that cooperates of the position of window 212,214 and socket is aimed at, and the pin of plug can freely enter in the receptacle openings.Similarly, when contact arm 50 is positioned at its lower position, trip arm 202 is moved to its lower position X, and utilizing the power of spring 224, mobile U-shaped element 206 and barrier element 208,210 so that barrier element 208,210 be positioned at after at least one opening of each socket, thereby stop the pin of plug to enter socket.
Like this, in the running, when GFCI was in tripped condition, barrier element stopped at least one pin receiver hole of each socket.In case attempt to reset, if available, along with the release of reset button, it will promote contact arm 50, the closed main contact of described contact arm.When this takes place, the contact arm 50 that is connected to trip arm 202 moves to its top position Z, and the engagement of the angled section of projection 204 is positioned at the edge 222 at center, drive the strength that the U-shaped element is bearing spring 224, thereby their opening that cooperates is aimed in the position that makes window 214,216 and the socket.
Referring to prior art schematic diagram shown in Figure 5, the circuit that is used for the GFCI of detection failure utilizes bridge contact to guarantee protection to receptacle contact.More specifically, contact arm 50 is supporting two contacts 52 and 62.Contact 52 cooperates with contact 56, and contact 62 cooperates with contact 66.In when operation, when having technology GFCI to be in its unfaulty conditions in the ban, circuit-closing contacts 52 with 56 and circuit-closing contacts 62 with 66 to allow receptacle contact 60 to be connected to load contact 36 mutually.When GFCI was in its malfunction, contact 52 and 62 is break 56 and 66 respectively. Contact 52,56 and 62,66 is called as bridge contact.They provide circuit phase contact 34 and the load isolation of contact 36 and receptacle contact 60 mutually.In a similar manner, bridge contact 72,76 and 82,86 provides the isolation of circuit neutral contact 38 with load neutral contact 40 and receptacle contact 80.In Fig. 6, disclose a kind of from receptacle contact and load contacts split circuit neutral contact 38 and circuit mutually contact 34 more economically and simple method.Specifically referring to contact arm 50, it is not needed cooperating the travelling contact 62 of fixed contact 66, and it is removed, and will be connected on the lead-in wire 37 at point 39 from the lead-in wire 61 of receptacle contact 60, and it connects together contact 36 and contact 56.In a similar manner, attached on the contact arm 70 and to cooperate the travelling contact 82 of fixed contact 86 be not needed now, and with its removal, and will be connected on the lead-in wire 41 at point 43 from the lead-in wire 81 of receptacle contact 80, it connects together contact 40 and contact 76.Use the new improved circuit of Fig. 6, the contact 60,80 of socket and the contact 36,40 of load link together, and and if only if GFCI when being in unfaulty conditions, they are connected to line contacts 34,38 conversely.Under normal operating condition, when not having fault on the line, electric current arrives load contacts 36,40 and arrives receptacle contact 60,80 by GFCI from line contacts.
Although the element that uses during aforesaid circuit interruption and device homing action is electric mechanical in essence, but the application also considers to use electronic component, for example solid-state switch and support circuit, and the element that can connect and interrupt other type that is electrically connected in the conductive path.
Although represented and describe and pointed out fundamental characteristics of the present invention, be to be understood that those familiar with the art can carry out various omissions, replacement and variation to the device describing and represent and the form and the details of operation thereof, and do not deviate from marrow of the present invention.
Claims (19)
1. tripper, it comprises:
A shell;
Be placed in a phase conductive path and a neutral conductive path between a line scan pickup coil side and load end within the described shell separately at least in part, described phase conductive path ends at first connection that can be electrically connected to power supply, can connect and can be connected to second of at least one load conduction, and described neutral conductive path ends at the 4th connection that can be electrically connected to power supply to the 3rd of at least one user accessible load conduction, can neutral the 5th connection that connects be provided and can provide neutral the 6th connection that is connected to described at least one load to described at least one user accessible load;
A circuit interruption part is placed within the described shell and is configured to generation according to predetermined state, causes described phase conductive path between described line scan pickup coil side and described load end and the electrical breaks in the neutral conductive path;
The part that resets is placed within the described shell at least in part and is configured to rebulid in described phase conductive path and neutral conductive path and is electrically connected;
Described circuit interruption part further comprises a reset locking part, if if if described circuit interruption partly be the disabled neutral state that exist to disconnect or have reverse wiring situation, then described reset locking partly stops to rebulid in described phase conductive path and neutral conductive path and is electrically connected, and wherein said reset portion branch comprises:
A reset button;
At least one reset contact, the at least a portion that can contact described phase conductive path when this at least one reset contact is pressed is to cause described predetermined state, if wherein described circuit interruption partly is available, triggering described circuit interruption part is electrically connected to forbid described reset locking part and to be convenient to rebulid in described phase conductive path and neutral conductive path, if and wherein described circuit interruption partly is disabled, described reset locking part still keeps being enabled being electrically connected so that stop to rebulid in described phase conductive path and neutral conductive path; And
One is positioned within the described shell, is partly controlled partly to be disabled, as to have disconnection neutral state in circuit interruption or to stop that the described the 3rd connects the element of the shaping that is connected to a user accessible load when having reverse wiring situation by described circuit interruption.
2. the tripper of claim 1, the element of wherein said shaping is suitable for occupying primary importance when partly being disabled stoping the described the 3rd to connect and be connected to user accessible load in circuit interruption, but and occupies the second place to allow the 3rd to connect and be connected to user accessible load in the circuit interruption part time spent.
3. the tripper of claim 2 wherein partly comes the element of described shaping is put into first or the second place by described circuit interruption.
4. the tripper of claim 3, the element of wherein said shaping comprises a barrier element, it is connected with the cantalever element by a described circuit interruption part of engagement and is moved.
5. the tripper of claim 4, the element of wherein said shaping is nonconducting.
6. tripper, it comprises:
A shell;
A first electrically conductive path that is placed within the described shell at least in part and ends at first connection, described first connection can be electrically connected to power supply;
A second electrically conductive path that is placed within the described shell at least in part and ends at second connection, when being electrically connected between the described first and second electrically conductive paths connected, described second connection can be electrically connected at least one load;
The 3rd an electrically conductive path that is placed within the described shell at least in part and ends at the 3rd connection, when being electrically connected between the described first and the 3rd electrically conductive path connected, the described the 3rd connected the load that can be electrically connected at least one user-accessible;
A circuit interruption part is placed within the described shell and is configured to generation according to predetermined state, interrupts being electrically connected between the described first and second electrically conductive paths and between the described first and the 3rd electrically conductive path;
The part that resets is placed within the described shell at least in part and is configured to turn on being electrically connected between the described first and second electrically conductive paths and between the described first and the 3rd electrically conductive path;
If described tripper further comprises when a described circuit interruption part is unavailable, stop and connect between the described first and second electrically conductive paths and the reset locking part that is electrically connected between the described first and the 3rd electrically conductive path;
Wherein said reset portion branch comprises:
A reset button;
At least one reset contact, the at least a portion that can contact one of described first or second electrically conductive path when this at least one reset contact is pressed is to cause described predetermined state, if wherein described circuit interruption partly is available, trigger described circuit interruption part to forbid described reset locking part and to be convenient to connect being electrically connected between the described first and second electrically conductive paths and between the described first and the 3rd electrically conductive path, if and wherein described circuit interruption partly is disabled, described reset locking part still is enabled so that stops between the described first and second electrically conductive paths of connection and being electrically connected between the described first and the 3rd electrically conductive path; And
The element that is shaped, it has at least one window that is connected to described circuit interruption part, connects the load that is connected to a user-accessible to stop the 3rd when described predetermined state takes place.
7. tripper, it comprises:
A shell;
A first electrically conductive path that is placed within the described shell at least in part and ends at first connection, described first connection can be electrically connected to power supply;
A second electrically conductive path that is placed within the described shell at least in part and ends at second connection, when being electrically connected between the described first and second electrically conductive paths connected, described second connection can be electrically connected at least one load;
The 3rd an electrically conductive path that is placed within the described shell at least in part and ends at the 3rd connection, when being electrically connected between the described first and second electrically conductive paths connected, the described the 3rd connected the load that is electrically connected to the second electrically conductive path and can be electrically connected at least one user-accessible;
A circuit interruption part is placed within the described shell and is configured to generation according to predetermined state, interrupts from described first to described second and being electrically connected of the 3rd electrically conductive path;
The part that resets is placed within the described shell at least in part and is configured to connect from described first to described second and/or being electrically connected of the 3rd electrically conductive path;
If described tripper further comprises when a described circuit interruption part is unavailable, stop the reset locking part that is electrically connected of connection from described first to described second and the 3rd electrically conductive path;
Wherein said reset portion branch comprises:
A reset button;
At least one reset contact, when being pressed, this at least one reset contact can contact described first, at least a portion of one of the second or the 3rd electrically conductive path is to cause described predetermined state, if wherein described circuit interruption partly is available, trigger described circuit interruption part to forbid described reset locking part and to be convenient to connect from described first to described second and being electrically connected of the 3rd electrically conductive path, if and wherein described circuit interruption partly is disabled, described reset locking part still is enabled so that stops being electrically connected of connection from described first to described second and the 3rd electrically conductive path; And
The element that is shaped, when being electrically connected between the first and the 3rd electrically conductive path was disconnected, it was connected to described tripper to stop that the described the 3rd connects the load that is connected to a user-accessible.
8. the tripper of claim 7, the element of wherein said shaping is suitable for occupying primary importance when partly being disabled stoping the 3rd to connect and be connected to user accessible load in circuit interruption, but and occupies the second place to allow the 3rd to connect and be connected to user accessible load in the circuit interruption part time spent.
9. the tripper of claim 8, the element of wherein said shaping comprises a barrier element, it is connected to one and is partly controlled by described circuit interruption so that described barrier element is positioned at first or the cantalever element of the second place.
10. the tripper of claim 9, the element of wherein said shaping is nonconducting.
11. a tripper, it comprises:
Canning;
The first electrically conductive access device is used for conducting electricity within described canning and can being connected electrically to power supply;
The second electrically conductive access device is used for conducting electricity within described canning, and when turning on being electrically connected between the described first and second electrically conductive access devices, can be connected electrically at least one load;
The 3rd electrically conductive access device is used for conducting electricity within described canning, and when turning on being electrically connected between the described first and the 3rd electrically conductive access device, can be connected electrically to the load of at least one user-accessible;
Be placed in the circuit interruption device within the described canning, be used for generation, interrupt from described first to described second and being electrically connected of the 3rd electrically conductive access device according to predetermined state;
Be placed in the resetting means within the described canning at least in part, be used to rebulid from described first to described second and being electrically connected of the 3rd electrically conductive access device;
Wherein said resetting means comprises:
A reset button;
Reset contact device with described reset button can be operatively connected is used for when pressing described reset button, by causing described predetermined state, triggers described circuit interruption device; And
The element that is shaped, it is connected to described circuit interruption device, is connected to the load of described at least one user-accessible to stop the 3rd electrically conductive access device between the emergence period at predetermined state.
12. the tripper of claim 11, the element of wherein said shaping be suitable for according to predetermined state occupy primary importance stoping the 3rd to connect and to be connected to user accessible load, and occupy the second place to allow the 3rd to connect and be connected to user accessible load according to the termination of predetermined state.
13. the tripper of claim 12, the element of wherein said shaping comprise a barrier element, its be connected to one by circuit interruption device control so that described barrier element is positioned at first or the cantalever element of the second place.
14. the tripper of claim 13, the element of wherein said shaping is nonconducting.
15. a circuit interruption system, it comprises:
A power supply;
A tripper, it all has error protection on the circuit of the described tripper that is connected with described power supply and load end;
Be connected at least one load of described tripper;
Wherein said tripper comprises:
A shell;
Be placed in a phase conductive path and a neutral conductive path between a line scan pickup coil side and load end within the described shell separately at least in part, described phase conductive path ends at first connection that can be electrically connected to power supply, can connect and can be connected to second of at least one load conduction, and described neutral conductive path ends at the 4th connection that can be electrically connected to power supply to the 3rd of at least one user accessible load conduction, can neutral the 5th connection that connects be provided and can provide neutral the 6th connection that is connected to described at least one load to described at least one user accessible load;
A circuit interruption part is placed within the described shell and is configured to generation according to predetermined state, causes described conductive path mutually on described line scan pickup coil side and described load end and the electrical breaks in the neutral conductive path;
The part that resets is placed within the described shell at least in part and is configured to rebulid in described phase conductive path and neutral conductive path and is electrically connected;
If, stop in described phase conductive path and neutral conductive path, to rebulid the reset locking part that is electrically connected when described tripper comprises further that if described circuit interruption part is unavailable or has the neutral state that disconnects;
Wherein said reset portion branch comprises:
A reset button;
At least one reset contact, the at least a portion that can contact described phase conductive path when this at least one reset contact is pressed is to cause described predetermined state, if wherein described circuit interruption partly is available, triggering described circuit interruption part is electrically connected to forbid described reset locking part and to be convenient to rebulid in described phase conductive path and neutral conductive path, if and wherein described circuit interruption partly is disabled, described reset locking part still is enabled and is electrically connected so that stop to rebulid in described phase conductive path and neutral conductive path; And
The element that is shaped, it is connected to described circuit interruption part, if with unavailable at tripper or stop that the 3rd connects the load that is connected to described at least one user-accessible when having the neutral state of disconnection.
16. the tripper of claim 15, the element of wherein said shaping is suitable for occupying primary importance when partly being disabled stoping the 3rd to connect and be connected to described user accessible load in circuit interruption, but and occupies the second place to allow the 3rd to connect and be connected to user accessible load in the circuit interruption part time spent.
17. the tripper of claim 16 wherein partly comes the element of described shaping is put into first or the second place by described circuit interruption.
18. the tripper of claim 17, the element of wherein said shaping comprise a barrier element, it is connected with the cantalever element by a described circuit interruption part of engagement and is moved.
19. the tripper of claim 18, the element of wherein said shaping is nonconducting.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US44195603P | 2003-01-23 | 2003-01-23 | |
| US60/441,956 | 2003-01-23 | ||
| US10/752,576 | 2004-01-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1759514A CN1759514A (en) | 2006-04-12 |
| CN100533899C true CN100533899C (en) | 2009-08-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800068121A Expired - Fee Related CN100533899C (en) | 2003-01-23 | 2004-01-22 | GFCI receptacle having plug blocking means |
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| Country | Link |
|---|---|
| CN (1) | CN100533899C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8568152B1 (en) * | 2012-04-19 | 2013-10-29 | Pass & Seymour, Inc. | Shutter assembly for electrical devices |
| US9846759B2 (en) * | 2015-07-30 | 2017-12-19 | Taiwan Semiconductor Manufacturing Company, Ltd. | Global connection routing method and system for performing the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4595894A (en) * | 1983-12-05 | 1986-06-17 | Leviton Manufacturing Co., Inc. | Ground fault circuit interrupting system |
| CN1214154A (en) * | 1995-12-29 | 1999-04-14 | 塔瓦制造有限公司 | Ground fault circuit interrupter |
| US6040967A (en) * | 1998-08-24 | 2000-03-21 | Leviton Manufacturing Co., Inc. | Reset lockout for circuit interrupting device |
-
2004
- 2004-01-22 CN CNB2004800068121A patent/CN100533899C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4595894A (en) * | 1983-12-05 | 1986-06-17 | Leviton Manufacturing Co., Inc. | Ground fault circuit interrupting system |
| CN1214154A (en) * | 1995-12-29 | 1999-04-14 | 塔瓦制造有限公司 | Ground fault circuit interrupter |
| US6040967A (en) * | 1998-08-24 | 2000-03-21 | Leviton Manufacturing Co., Inc. | Reset lockout for circuit interrupting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1759514A (en) | 2006-04-12 |
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