CN100492793C - Circuit interrupting device and system utilizing electromechanical reset - Google Patents
Circuit interrupting device and system utilizing electromechanical reset Download PDFInfo
- Publication number
- CN100492793C CN100492793C CNB2004800066465A CN200480006646A CN100492793C CN 100492793 C CN100492793 C CN 100492793C CN B2004800066465 A CNB2004800066465 A CN B2004800066465A CN 200480006646 A CN200480006646 A CN 200480006646A CN 100492793 C CN100492793 C CN 100492793C
- Authority
- CN
- China
- Prior art keywords
- lifter
- reset
- terminal
- electric conductor
- tripper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000012360 testing method Methods 0.000 claims description 49
- 239000004020 conductor Substances 0.000 claims description 39
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 19
- 230000000712 assembly Effects 0.000 claims description 10
- 238000000429 assembly Methods 0.000 claims description 10
- 238000007654 immersion Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 19
- 230000007935 neutral effect Effects 0.000 description 15
- 230000007246 mechanism Effects 0.000 description 10
- 238000005452 bending Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005662 electromechanics Effects 0.000 description 3
- 230000001788 irregular Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009183 running Effects 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- VAYOSLLFUXYJDT-RDTXWAMCSA-N Lysergic acid diethylamide Chemical class C1=CC(C=2[C@H](N(C)C[C@@H](C=2)C(=O)N(CC)CC)C2)=C3C2=CNC3=C1 VAYOSLLFUXYJDT-RDTXWAMCSA-N 0.000 description 2
- 238000005760 Tripper reaction Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Images
Abstract
A GFCI device which has reverse wiring protection is provided where no power is present at the face terminals even when the device is reverse wired. The device has a pair of movable bridges connected to its terminals. The terminal bridge pair makes contact with the load and face terminals providing power to these terminals when the device is reset. The device also has a reset lockout feature that prevents it from being reset after having been tripped if the circuit interrupting portion of the device is non-operational.
Description
Cross reference to related application
The application require to enjoy in application on February 3rd, 2003, series number is No.60/444, the priority of 469 provisional application.
The present invention with belong to the applicant and title together and apply on October 22nd, 2003 for the related application of " utilizing the electric bridge contact mechanism and the tripper and the system of the lock piece that resets ".
Technical field
The application relates to gang can reset tripper and system, comprising: ground-fault interrupter (GFCI); Arc-fault circuit interrupter (AFCI); Immerse and detect circuit breaker (IDCI); Equipment residual current circuit breaker (ALCI); Device residual current circuit breaker (ELCI); Circuit breaker; Contactor; Latching relay and solenoid mechanism.More particularly, the application relates to tripper, and this device comprises the part that opens circuit, and this part that opens circuit can be cut off the line side of tripper and the conductivity path between the load-side.
Background technology
Many terminations have the line side that links to each other with power supply, the load-side that can link to each other with one or more loads and at least one conducting path between line side and the load-side.To one or more loads supply electric power or the electrical connection that conducts electricity is the electrical connection that is in line side and load-side.Line unit industry witness to the growth of requirement of tripper or system, described tripper or system are designed to interrupt the supply of electric power to different loads such as household electrical appliance, household electricity product and branch circuit.Specifically, the ground-fault interrupter (GFCI) for example of the circuit arrangement in electricity consumption code requirement Household bathroom and the kitchen.In U.S. Patent No. 4,595, a kind of GFCI device has been done more detailed description, the combined as a reference in this application use of the full content of this patent in 894.At present the GFCI device that uses is for example by U.S. Patent No. 4,595,894 (' 894 patents that the applicant had) described device utilizes a kind of electric actuation tripping mechanism to come electrical connection between mechanically line disconnection side and the load-side.This device can reset after opening circuit for example detecting earth fault again.In the device that ' 894 patent is discussed, circuit (being the conducting path between line side and the load-side) machinery is disconnected used tripping mechanism comprise a solenoid (or being called breaking coil).A test button is used to detect tripping mechanism and circuit, and this tripping mechanism and circuit are used for the sensing fault.A reset button is used for the electrical connection between line side and the load-side is resetted.
But, when the abnormal state that is caused by for example thunderbolt produces, not only can make the electric power in the device produce fluctuation and make the device tripping operation, and can make the used tripping mechanism of mechanical cutting circuit lose effectiveness.This may take place under the unwitting situation of user.Unwitting user faces the GFCI device and trips, can push reset button, and device with inoperative tripping mechanism is reset under the situation of earth fault protection not having.
In addition, can exist according to the determined a kind of open neutral condition of Underwriters Laboratories (UL) Standard PAG943A (open neutral condition), this moment, electric lead was to this GFCI device provisioning electric energy.If there is open neutral condition in the center line lead on GFCI device circuit (relative with the load) side, then can produce such situation promptly produce one from via the load-side of device and people to phase line (or having) lead of GFCI device power supply current path to the earth polar transferring electric power.Exist under the situation of open neutral condition, even the current GFCI device that has tripped still exists open neutral condition also still can be reset.
By the applicant have on August 24th, 1998 application, series number is No.09/138,955 U.S. Patent No. 6,040,967 full content in this application as a reference and combined use, this patent has been described gang's tripper that can reset, part is not worked or is had open neutral condition if open circuit, but the reset portion of this this device of tripper locking.
More above-mentioned trippers also have the spendable load-side connecting portion of user except that having line side and load-side connecting portion.The spendable load-side connecting portion of user comprises one or more tie points, and at described tie point place, the user can carry out the outside with the electric power from the line side supply and be connected.The spendable load-side connecting portion of load-side connecting portion and user is electrically connected usually.An example of this tripper is the GFCI socket, wherein, line side and load-side connecting portion are terminal screw, and the spendable load-side connecting portion of user is that a kind of two holes or Three-hole socket of using always in electric power output links to each other with the power device with common use three-prong or two pin public plugs.As mentioned above, this tripper links to each other with outer circuit, and like this, the line side lead just links to each other with the line side connecting portion, and load side wires links to each other with the load-side connecting portion.But, tripper may take place to be connected to the situation of outer circuit and loaded line to be linked to each other with the line side connecting portion and the line side lead is linked to each other with the load connecting portion with incorrect.This situation is called as reverse wiring.Be reversed at tripper under the situation of wiring, even the error protection of load-side connecting portion is still existed, the error protection that can arrive the load connecting portion to the user also may be eliminated.In addition, because error protection is eliminated, the spendable terminal of user (i.e. three holes or two spring hole scokets) will have electric power, will make the user think its true(-)running like this under this installs the situation of actual maloperation.Therefore, when the tripper reverse wiring, just need the sensing fault.In addition, the reverse wiring that also needs holdout device.In addition, when tripper reverse wiring or tripper irregular operating, need prevent that the spendable face terminals of user has electric power.
Summary of the invention
The present invention relates to gang's tripper that can reset, when reverse wiring, this device can stop electric energy to arrive the user of device.This device has a kind of reset lockout and resets under the situation of maloperation with holdout device.If do not reset and device when being reversed wiring, there is not electric energy to be transported to be arranged in spendable socket of user and/or plug on this device panel at this device.Various device of the present invention has at least one pair of line terminal, a pair of face terminals and a pair of panel terminal.Line terminal can be electrically connected with power supply.Face terminals is electrically connected with load and is connected with power supply is incorrect when device is reversed wiring.Panel terminal can use plug with user on for example being arranged in the device panel and/or socket is electronic is connected.Line terminal, face terminals and panel terminal electrically insulated from one another.Device of the present invention promptly is electrically connected and makes and conveying under the off-position of not having electrical connection between face terminals and the panel terminal in nothing between line terminal and the face terminals in off-position.Like this, under off-position, described at least three kinds of terminals are electrically insulated from one another.
Every pair of terminal has a phase terminal and a neutral terminal.When interconnecting, corresponding phase terminal then forms a phase conductive path.Equally, when corresponding neutral terminal interconnects, then form a neutral conductive path.Phase conductive path preferably includes one or more switching devices, and this switching device can be opened and the electric energy in the phase conductive path is cut off, and this switching device also can be closed to rebulid the electrical connection in the phase conductive path.In addition, neutral conductive path comprises one or more switching devices, and this switching device can be opened and the electric energy in the neutral conductive path is cut off, and this switching device also can be closed to rebulid the electrical connection in the neutral conductive path.
Device of the present invention all further has a pair of removable electric bridge that is electrically connected with line terminal.When this device be reset and with power delivery to the device panel the time, removable electric bridge is connected line terminal with face terminals and panel terminal are electronic.Removable electric bridge must be away from load and panel terminal by mechanical bias.When this device by incorrect cabling or when being called reverse wiring (being that electric energy is connected to face terminals), even under the situation of attempting making this device to reset, reset lockout can stop removable electric bridge that line terminal is linked to each other with panel terminal with face terminals, so stops at the panel terminal place or there are electric energy in the spendable plug of user and/or socket place.
In one embodiment, this tripper comprises a housing, is furnished with line terminal, removable electric bridge, face terminals and panel terminal to small part in housing.This tripper comprises that also the part that opens circuit that is arranged in the housing is the electrical connection between the described terminal of cut-out under the situation of predetermined state to occur.Tripper also comprises a trip portion, a reset portion and a testing circuit.
An embodiment of tripper uses a kind of electromechanics part that opens circuit to come electrical connection between line disconnection terminal, face terminals and the panel terminal.Rebulid electrical connection between reset lockout prevention line terminal, face terminals and the panel terminal, unless the normal operation of the part that opens circuit.That is to say, unless reset lockout stops this device the to reset normal operation of part of opening circuit.Reset portion allow this device to reset and produce electrical connection between line terminal and the face terminals and the electrical connection between line terminal and the panel terminal promptly device be in the pattern of setting or resetting.In addition, when resetting, device also has electrical connection between face terminals and the panel terminal.Like this, reset portion has just been set up electrical connection between line terminal, face terminals and panel terminal.Electromechanics opens circuit and partly comprises: latch plate and lifter assembly; Coil and core assembly; Mechanical switch assemblies; Described removable electric bridge and testing circuit.
Reset portion comprises a return pin that links to each other with a reset button; Button and return pin are subjected to mechanical bias, and described return pin has the flange (for example round flange or dish) that radially extends from its end, are pressed down and device when being in off state in return pin, and the flange of return pin and latch plate and lifter assembly interact.The latch plate of interference and lifter assembly match and the start detection circuit with mechanical switch assemblies.The normal operation of part if open circuit, the testing circuit that is activated can excite the coil block that combines with testing circuit.Be furnished with a removable iron core in coil block, the coil block that is excited makes removable iron core combine with latch plate and allows the end and the instantaneous opening of aiming in latch plate and the lifter assembly that passes of described flange of return pin.Then, described opening no longer aim at and with the ends restrict of described flange and return pin below lifter.Present described flange just below lifter with latch plate and the interference of lifter assembly.Be subjected to pushing under the d/d situation in back at button, the biasing of return pin is tended to away from latch plate and lifter assembly this return pin.When discharging reset button, the biasing of return pin makes it promote latch plate and lifter assembly with its interference flange.Like this, the lifter of latch plate and lifter assembly part combine with removable electric bridge and make electric bridge with line terminal, face terminals, panel terminal is electronic is connected, set or reset mode thereby device placed.The part maloperation if open circuit, the iron core of coil block does not just match with latch plate and lifter assembly and stops tripper to reset.
Testing circuit comprises that a plurality of electronic and electronic units are to detect the appearance of predetermined state.Described testing circuit opens circuit with described electromechanics and partly combines.When detecting predetermined state, this testing circuit actuator electrical circuit breakers and make device be in off state.
Realize described off state by the trip portion that activates tripper.The trip portion of tripper to small part is arranged in the described housing and cuts off electrical connection in phase line and/or the neutral conductive path.When this device detects a kind of predetermined state (for example earth fault) and is in the reset mode, also described off state can appear.In one embodiment, trip portion comprises a test button that links to each other with trip pin, and the end of this trip pin has a cam portion or sloping portion, and when this device was reset, cam portion can combine with latch plate.Trip pin and test button be by mechanical bias, and when discharging after pressing down test button and with it like this, trip pin is tended to away from latch plate and lifter assembly.When being in to start under the situation of reset mode, this device make the cam portion of trip pin aim at the opening of lifter and latch plate when opening circuit part (being that button is pressed down) with instantaneous combination of latch plate; Allow the end of return pin and flange below lifter, to discharge like this and no longer with lifter and the interference of latch plate assembly.The result that lifter and latch plate no longer promote the biasing of removable electric bridge and removable electric bridge can make them away from face terminals and panel terminal line terminal, face terminals and panel terminal be disconnected mutually, thereby makes this device be in off state.
Description of drawings
With reference to the accompanying drawings and will be hereinafter the application's preferred embodiment be described, adopt same reference symbol to indicate components identical in the accompanying drawings, wherein:
Figure 1 shows that perspective view according to an embodiment of grounding fault breaking apparatus of the present invention;
Figure 2 shows that the vertical view of the faceplate part of GFCI device shown in Figure 1 being removed the back remainder;
Figure 3 shows that the decomposition diagram of panel terminal inner support, face terminals and removable electric bridge;
Figure 4 shows that the structure perspective view of some parts partly that open circuit of apparatus of the present invention;
Figure 5 shows that the end view of Fig. 4;
Figure 6 shows that the perspective view of reset portion of the present invention;
Figure 7 shows that the decomposition diagram of the lifter/latch assembly of tripper of the present invention;
Figure 8 shows that the schematic diagram of testing circuit;
Fig. 9-14 is depicted as in the operating sequence of device of the present invention when off state resets;
Operating sequence when Figure 15-18 is depicted as the apparatus of the present invention that are in reset mode and opens circuit.
Embodiment
The present invention has considered to have the dissimilar trippers of at least one conducting path.This conducting path usually the line side that links to each other with power supply, the load-side that links to each other with one or more loads and with user side that spendable plug of user or socket link to each other between separate.As mentioned above, the different device in the resetted tripper of the same clan comprises: ground-fault interrupter (GFCI), arc-fault circuit interrupter (AFCI); Immerse and detect circuit breaker (IDCI); Equipment residual current circuit breaker (ALCI); Device residual current circuit breaker (ELCI).
Be to realize the application's purpose, in the accompanying drawings shown in and the used structure of hereinafter described tripper or mechanism be bonded in a kind of GFCI device, this GFCI device is suitable for being installed in single set of connections box used in the residential circuit system for example.But the application's mechanism can be comprised in arbitrary other different device in the tripper family that can reset.In addition, situation more generally is: tripper of the present invention can be used as any device with at least one first, second, third electric conductor, and described each electric conductor all is arranged in the housing to small part.Described electric conductor electrically insulated from one another, first conductor can link to each other with power supply, and second conductor can link to each other with one or more loads, and the 3rd conductor can be touched by the user.At least one removable electric bridge that one end and power supply link to each other with first conductor interconnects first, second and the 3rd electric conductor, and when detecting a kind of fault or predetermined state, described removable electric bridge disconnects the connection of described each conductor mutually.
But more particularly, tripper described herein has the terminal of at least three pairs of electric insulations: at least one pair of line terminal, at least one pair of face terminals and at least one pair of user or panel terminal.Described at least one pair of line terminal with electric power (for example: alternating current) be communicated to described tripper; Described at least one pair of face terminals links to each other external conductor or equipment with described tripper.These connecting portions can be for example external conductor to be fastened or connected on the tripper and the electric fixture of conduction.The example of this connecting portion comprises terminal screw, lug plate, binding post and male connector connecting portion.Usually using described at least one panel that two pin jacks or three-prong socket implement or being called user's terminal allows the user by with two pins or three-prong public plug that described socket is complementary power device being electrically connected with the GFCI device.
Above-mentioned feature can be incorporated in arbitrary tripper that resets, but the purpose for explaining, following content relates to a kind of GFCI device.
In one embodiment, the GFCI device has: part, reset portion and reset lockout open circuit.This GFCI device also has a mechanical trip portion.The GFCI device also has a pair of removable electric bridge, electric bridge in conjunction with the time line terminal linked to each other with panel terminal with face terminals.When electric bridge not in conjunction with the time, line terminal, face terminals and panel terminal electrically insulated from one another.Because panel terminal and face terminals and line terminal electric insulation even therefore the GFCI device is reversed wiring (electric power is connected to face terminals but not line terminal), do not have electric energy at the panel terminal place yet.Removable electric bridge not in conjunction with the time, line terminal, face terminals and panel terminal electrically insulated from one another, this device just is considered to be in tripped condition.
Described herein open circuit part and reset portion preferably use electromechanical compo (electro-mechanical component) to disconnect the one or more conducting paths that reach between the line terminal of (opening) and connection (closure) GFCI device and the face terminals between line terminal and the panel terminal.But electric component (electrical component) can be used to the open and close conducting path as solid-state switch and auxiliary circuit (supporting circuitry).
Generally, when detecting fault, the part that opens circuit is used to the electrical connection (promptly disconnecting conducting path) in one or more conducting path between automatic line disconnection terminal and the face terminals, and described fault is earth fault in this embodiment.Electrical connection between line terminal and the panel terminal also is disconnected.Reset portion is used to the conducting path that closure is disconnected.
In this structure, the operation that reset portion and reset lockout are divided combines with the operation of the part that opens circuit, like this, if do not exist open neutral condition and/or device to be reversed wiring if the part that opens circuit is not worked, the electrical connection that is cut off in the conducting path then can not reset.When the part that opens circuit was not worked (arbitrary or a plurality of parts irregular operating that this just means this part that opens circuit), this device can not be reset.Mechanical trip portion can be independent of the operation of the part that opens circuit and electrical connection between line disconnection terminal, face terminals and the panel terminal.Therefore, under the situation of part maloperation that opens circuit, this device still can be opened circuit.
Forward Fig. 1 now to, this GFCI device has 12, one panels of a housing or is called end cap part 36 and is detachably fixed on the housing 12.Panel part 36 has the inlet 16,18,24,26 that aligns with socket standard or the polarization pin with the public plug that is contained in household electrical appliance electric wire (not shown) end and has usually, and panel part 36 also has ground pin receiving unit 17,25 to hold three pin plug.This GFCI device comprises that also mounting strap 14 is to be fixed to this device on the terminal box.
Further with reference to the accompanying drawings 1, realize being electrically connected to existing home circuit by terminal screw 28,30, for example, screw 30 is input (or line side) portion that is connected, screw 28 is output (or load-side) portion that is connected. Screw 28,30 is fixed on (passing through helicitic texture) terminal 32,34 respectively.But this GFCI device can design like this: promptly screw 30 is to export the portion that is connected, and screw 28 is input phase or circuit connecting portion.Terminal 32,34 is half of paired terminal.Therefore, two other terminal screws and terminal (not shown) are disposed on the opposition side of device 10.These other terminal screws provide circuit connecting portion and load neutral connecting portion respectively.It should be noted that: terminal screw and terminal are the exemplary types that can be used to provide the binding post of electrical connection section.The example of the binding post of other type comprises dog screw (set screw), pressure clamp (pressure clamp), pressure disc (pressure plate), drive-in connecting portion (push-in type connection), tap lead (pigtail) and quick brace (quick-connect tab).Panel terminal is used as the socket that matches with public plug.At length shown this panel terminal among Fig. 2.
With reference to figure 2, shown the vertical view (not display surface board 36 and mounting strap 14) of GFCI device among the figure.Shell structure 40 provides the platform of arranging the parts of GFCI device on it in a kind of.Reset button 20 and test button 22 are installed on the shell structure 40.Shell structure 40 is installed on the printed circuit board (PCB) 38.The socket that aligns with the opening 16 of panel part 36 is made of extension 50A, the 52A of support 48.Support 48 is made by electric conducting material, and the socket that aligns with opening 16,24 is formed by electric conducting material.The socket that aligns with the opening 24 of panel part 36 is made of extension 50B, the 52B of support 48.In addition, support 48 has a flange, is connected with conductive contact 56 on this flange end.Support 46 is an electric conducting material, and the socket that aligns with opening 18,26 is formed by support 46.Construct by support extension 42A, 44A with the socket that the opening 18 of panel part 36 aligns.Construct by extension 42B, 44B with the socket that the opening 26 of panel part 36 aligns.Support 46 has a flange, is connected with conductive contact 60 on this flange end.Therefore, support 46 and support 48 forms panel terminals and is used as the socket (referring to accompanying drawing 1) that the opening 16,18,24,26 with the panel part 36 of GFCI device 10 aligns.Face terminals 32 and line terminal 34 also are installed on the interior shell structure 40.Face terminals 32 has extension, and conduction load contact 58 is connected on the end of this extension.Equally, face terminals 54 has an extension, and conductive contact 62 is connected on this extension.Line terminal, face terminals and panel terminal electrically insulated from one another and be electrically connected mutually by a pair of removable electric bridge.Shown among Fig. 3 that how interconnective between correlation between line terminal, face terminals and the panel terminal and they be.
With reference now to Fig. 3,, shown the interaction of the mutual location of panel terminal and face terminals and they and removable electric bridge (64,66) among the figure.Though circuit terminal not among the figure it is to be understood that line terminal also is electrically connected with an end of removable electric bridge.Removable electric bridge (64,66) is generally electric conductor and is configured and arranges to such an extent that described at least line terminal is linked to each other with face terminals.Specifically, removable electric bridge 66 has kink 66B and connecting portion 66A.Kink 66B is electrically connected with line terminal 34 (not shown).Equally, removable electric bridge 64 has kink 64B and connecting portion 64A.Kink 64B is electrically connected with another line terminal (not shown); Described another line terminal is arranged on the opposition side of line terminal 34.The connecting portion 66 of removable electric bridge 66 has two fingers, all is connected with a bridge contact (68,70) on the end of described two fingers.The connecting portion 64A of removable electric bridge 64 also has two fingers, all is connected with bridge contact (72,74) on the end of described two fingers.Bridge contact (68,70,72,74) is to be made by the higher material of conductivity.In addition, face terminal contact the 56, the 60th is made by the higher material of conductivity.In addition, load terminal contacts the 58, the 62nd is made by the higher material of conductivity.Make the flexible metal that removable electric bridge preferably can bend when bearing mechanicals efforts.(64A is 66A) by biased downward mechanically or setovered in the general direction shown in the arrow 67 for the connecting portion of removable electric bridge.The connecting portion that makes removable electric bridge when the GFCI device resets moves in the direction shown in the arrow 65 and matches with face terminals and panel terminal and line terminal, face terminals and panel terminal are interconnected.Especially, the connecting portion 66A of removable electric bridge 66 is matched with the contact 56 of support 48 and the contact 58 of face terminals 32 respectively to allow contact 68,70 by (in the direction shown in the arrow 65) bending upwards.Equally, the connecting portion 64A of removable electric bridge 64 is matched with the contact 62 of face terminals 54 and the contact 60 of support 46 respectively to allow contact 72,74 by (in the direction shown in the arrow 65) bending upwards.The connecting portion of removable electric bridge is upwards bending under the effect that is positioned a breech lock/lifter assembly under the described connecting portion, when the GFCI device resets, described breech lock/lifter assembly is (direction shown in the arrow 65) motion upwards, and 14 pairs of these contents are described with reference to the accompanying drawings hereinafter.It should be noted that: when electric current flowed between described contact, the contact of removable electric bridge matched with the contact of face terminals or panel terminal, and this realizes by contact is in contact with one another.Some parts that the connecting portion that makes removable electric bridge moves up have been shown among Fig. 4.
With reference now to Fig. 4,, shown an iron-core coil combination that is installed on the printed circuit board (PCB) 38 among the figure, this combination comprises the bobbin 82 with a cavity, long cylindricality iron core 80 slides and is arranged in this cavity.For clarity sake, do not show support 48 and face terminals 32 among the figure.One end of the iron core 80 shown in the figure extends bobbin cavity.The other end (not shown) of iron core 80 combines with a spring or cooperates, when the coil excited target, iron core is drawn in the described cavity by the magnetic force that is produced after, described spring provides suitable active force so that the part of iron core is released bobbin cavity.The lead (not shown) is wrapped on the bobbin 82 to form coil.For clarity sake, do not show the lead that is wrapped on the bobbin 82 among the figure.Shown a lifter 78 and latch piece 84 assemblies among the figure, lifter 78 is arranged in below the removable electric bridge.Removable electric bridge 66,64 fixes by installing rack 86 (only having shown among the figure), and installing rack 86 also is used to line terminal 34 and another line terminal (not shown) are fixed on the GFCI device.It is to be understood that another installing rack 86 direct opposed of installing rack to that indicated in the drawings that is used to install removable electric bridge 64.Reset button 20 has a return pin 76 that matches with the assembly of lifter 78 and latch piece 84, and this content will show below.
With reference to the accompanying drawings 5, shown the end view of structure among Fig. 4 among the figure.When coil was subjected to encouraging, iron core 80 was drawn in the coil according to direction shown in the arrow 81.The connecting portion 66A of the removable electric bridge 66 shown in the figure is (in the indicated direction of arrow 85) biasing by downwards.Though do not show among the figure that the connecting portion of removable electric bridge 64 is biased downward too.The part of the mechanical switch shown in the figure in addition,---detection arm 90 be arranged in part lifter 78 below.It should be noted that: owing to do not show support 48 among the figure, therefore also display floater terminal contact 56 not.
With reference now to Fig. 6,, shown lifter 78 and latch piece 84 assemblies location among the figure with respect to bobbin 82, reset button 20 and return pin 76.Please note that return pin has bottom 76A and disk-shaped flange 76B.It should be noted that: flange 76B can be Any shape, and shown herein disk-shaped flange is a specific embodiment of spendable flange-type.The bottom 76A of return pin and flange 76B are positioned to the aligning opening of extend through latch piece 84 and lifter 78.Mechanical switch assemblies shown in the figure also be arranged in lifter 78 a part below.This mechanical switch assemblies comprises that detection arm 90 and test pin 92 are to cause the generation of off state.Utilize a spring coil (not shown) biasing reset button 20 and return pin 76 in the direction that makes progress (arrow 94 indicated direction).The detection arm 90 of mechanical switch is also by to upper offset.When detection arm 90 is pressed down (direction shown in the arrow 94A), this detection arm 90 will make progress (arrow 94 indicated direction) move to the initial position when being released.Equally, when reset button 20 is pressed down (in the direction shown in the arrow 94A), this reset button 20 will return back to its initial position by moving in direction shown in the arrow 94.Latch plate 84 and lifter 78 assemblies are installed in the top of bobbin 82.A part that has only shown lifter 78 among the figure is to demonstrate lifter 78 and how to match with detection arm 90 and how latch plate 84 matches with lifter 78.Fig. 7 has shown the physical relationship between latch plate 84 and the lifter 78.
With reference now to accompanying drawing 7,, shown among the figure how latch plate 84 slides and elasticity is installed on the lifter 78.Latch plate 84 has an opening 84B and another opening 84D, and spring coil 84A promptly is arranged among the opening 84D.Latch plate plush copper 84C is used to receive the end of spring coil 84A, and the other end of spring coil 84A matches with a catch pawl portion of lifter 78.Latch plate 84 has hook portion 84E and matches with test button 22, and 15 pairs of these contents are described below with reference to the accompanying drawings.Though return pin 76 is not the part of latch plate/lifter assembly, when the opening 84B of the opening 78A of lifter 78 and latch plate 84 mutually on time, the return pin 76 with bottom 76A and flange 76B is designed to be above-mentioned two openings of extend through.When the iron core 80 of iron-core coil assembly matched with latch plate 84, described two openings were aimed at mutually, will be described this content hereinafter.Detect fault or predetermined state when testing circuit and encouraged by testing circuit under the situation of described coil, iron core is drawn in the cavity of bobbin 82.In the embodiment that is discussed, the predetermined state that is detected is an earth fault.Described predetermined state can be the fault of any kind, arc fault for example, equipment fault, equipment leak current fault or immerse detection failure (immersion detection fault).Generally, the fault indication that comes to this: promptly tripper has detected a kind of precarious position and or prepare to cut off the electric power that is connected to this device by face terminals and/or panel terminal from the load that is connected.Shown this testing circuit among Fig. 8.
With reference now to accompanying drawing 8,, shown a testing circuit among the figure, this testing circuit comprises: differential transformer; Ground connection/center line (G/N) transformer; In a single day be used to detect electric current and detect the integrated circuit (IC-1) that electric current is an output voltage; Full wave bridge rectifier (D3, D4, D5, D6); A voltage suppressor (MV1) may be at the too high electric energy of line terminal appearance to absorb; A plurality of filtration coupling capacitances (C1-C9); A gate circuit semiconductor device (Q1); A relay coil assembly (K1); A plurality of current-limiting resistances (R1-R4) and a pressure limiting Zener diode (D2).As shown in the figure, the described mechanical switch that comprises detection arm 90 and test pin 92 links to each other with the conductor of the line terminal of arranging with current-limiting resistance R4 polyphone.Shown in removable electric bridge be used as the switch that line terminal and panel terminal are linked to each other with face terminals.Line terminal, face terminals and panel terminal electrically insulated from one another are unless be connected by removable electric bridge.When predetermined state such as earth fault occurred, there was difference in the current amplitude between two line terminals.This electric current difference shows as by the detected a kind of net current of differential transformer and is provided for IC-1.Integrated circuit (IC)-1 can be by National (Panasonic) semiconductor or other well-known semiconductor makers produced ground fault circuit (for example, LM-1851) in any integrated circuit commonly used.According to the electric current that differential transformer provided, integrated circuit (IC)-1 produces a voltage on the pin 1 that AND circuit Q1 links to each other.The full-wave bridge that is made of diode D3-D6 has the DC side that links to each other with the anode of Q1.Q1 is connected the DC side short circuit that makes full-wave bridge and field application relay K1, thereby make removable electric bridge remove electric power from panel terminal and face terminals.Arrange bobbin 82, coil (not shown) and iron core 80 parts in the relay K 1.Should note: when Q1 was switched on, diode D1 played rectification function and is retained to the voltage supply of IC-1.Also actuatable relay K 1 when mechanical switch 90 is closed and the imbalance of electric current of causing on line terminal conductors, this imbalance is detected by differential transformer.The G/N transformer detects at the long-range earthed voltage that occurs on one of face terminals conductor and provide electric current to IC-1 when detecting this long-range earthed voltage, thereby activates relay K 1 once more.
Described testing circuit matches with the part that opens circuit of GFCI device and this device is opened circuit.In addition, if the lock piece that resets after the GFCI device opens circuit does not activated yet, described testing circuit can allow the GFCI device to reset, and will be described this content below.Under off state, line terminal, face terminals and panel terminal electrically insulated from one another.Like this, even device is reversed wiring, there is not electric power at the panel terminal place yet.The GFCI device of manufacturing is to transport under the state that opens circuit according to the present invention.Open circuit and partly comprise coil and iron core (80) assembly, latch plate (84) and lifter (78) assembly, mechanical switch assemblies (90,92).
9-14 has shown the order that the GFCI device resets from off state among the figure with reference to the accompanying drawings.When the GFCI device is in off state, line terminal, face terminals and panel electrically insulated from one another, this is because removable electric bridge does not combine with any terminal.With reference to the accompanying drawings 9, shown the deployment scenarios of reset button 20, return pin 76, return pin bottom 76A and disk-shaped flange 76B when device is in off state among the figure.Under off state, the lifter 78 that is arranged in below the removable electric bridge (not shown) does not match with removable electric bridge.Reset button 20 is in its extreme higher position.The opening that latch piece 84 and lifter 78 such layouts are latch piece 84 and lifter does not align and does not allow described disk-shaped flange 76B to pass described opening.In addition, the part of lifter 78 is arranged in the just top of detection arm 90 but does not match with detection arm 90.
The GFCI device is tentatively resetted, press down (in the direction shown in the arrow 94A) reset button 20 and make flange 76B and latch plate 84 interferences so that lifter 78 is depressed on the detection arm 90 of mechanical switch.Like this, detection arm 90 just contact (referring to accompanying drawing 6) with test pin 92.
In Figure 11, when detection arm 90 contacted with test pin 92, as previously mentioned, testing circuit activated excitation coil, thereby draw in the bobbin 82 and combine the iron core 80 instantaneous promotion latch plate 84 in the direction shown in the arrow 81 of more specifically saying so with latch plate 84 iron core 80 is instantaneous.
In Figure 12, slide (in the direction shown in the arrow 81) and the opening of its opening and lifter is aligned along lifter 78 when latch plate is subjected to the promotion of iron core 80, thus the described opening 84B of a part of extend through, the 78A (referring to accompanying drawing 7) of permission flange 76B and return pin bottom 76A.
In Figure 13, latch plate rollback (in the direction shown in the arrow 81A), and when reset button discharges, also resilience and being separated of detection arm 90 with test pin 92.In Figure 14, the rollback of latch plate 84 opening 84B is not aligned with opening 74B once more and with flange 78 be limited in lifter 78 and latch assembly below.When reset button was released, the biasing of return pin 76 was raised lifter and latch assembly with restricted flange 76B and lifter (being arranged in the following of removable electric bridge) is matched with removable electric bridge 66,64.Specifically, the connecting portion of removable electric bridge 66,64 (66A, 64A) respectively in the direction shown in the arrow 65 (referring to Fig. 3 and corresponding content of the discussions) bending and line terminal, face terminals and panel terminal are electrically connected mutually.The GFCI device is in the reset mode and is electrically connected mutually and allows to be provided to face terminals and panel terminal from the electric power of line terminal with regard to the electrical contact that means line terminal, face terminals and panel terminal now.GFCI device hold reset pattern always detects fault or by pressing detection button 22 the GFCI device is opened circuit until testing circuit.
When checkout gear detects the earth fault of a kind of state such as GFCI or detect other states (as arc fault, immersion sensing fault, equipment leak current fault; The device leak current fault) time, testing circuit makes iron core 80 match with latch plate 84 with regard to excitation coil, thereby latch openings 84B and lifter opening 78A are aligned and allow return pin bottom 76A and disk-shaped flange 76B below lifter, to spin off, lifter is separated mutually with removable electric bridge 64,66, and removable electric bridge 64,66 is because biasing and away from face terminal contact and load terminal contacts.Based on this, line terminal, face terminals and panel terminal electrically insulated from one another and make the GFCI device be in (referring to accompanying drawing 9) in off state or the situation.
Also can make GFCI device of the present invention enter off state by pressing down test button 22.In accompanying drawing 15-18, shown the operating sequence of how utilizing test button 22 and this device being opened circuit.In accompanying drawing 15, when being in the reset mode, device presses down test button 22.Test button 22 has test button pin 22A of portion and coupled cam end portion 22B, cam end portion 22B in the direction shown in the arrow 94 by mechanically to upper offset.Cam end portion 22B is preferably taper, like this, when cam end portion 22B matches with the hook end 84E of latch plate 84 because the angle of test button pin portion 22A end former thereby can produce cam action.
In accompanying drawing 16, described cam action is to make the motion of latch plate 84 in direction shown in the arrow 81, this action that latch plate opening 84B and lifter opening 78A are aligned when pressing down (in the direction shown in the arrow 94A) test button 22.
In accompanying drawing 17, opening (78A, 84B) aligning allows return pin bottom 76A and disk-shaped flange 76B disengaging and lifter and removable electric bridge 64,66 are separated below lifter, and removable electric bridge 64,66 is because setover former thereby away from face terminal contact and load terminal contacts (referring to Fig. 3).Test button is in the extreme higher position for 20 this moments.Therefore, line terminal, face terminals and panel terminal electrically insulated from one another and in the state or situation that the GFCI device are in open circuit (referring to accompanying drawing 9).In Figure 18, test button 22 is released and makes its biasing move with upwards (in the direction shown in the arrow 94) and be separated with the hook portion 84E of latch plate 84.Latch plate rollback and make opening in the latch plate 84 and the opening misalignment of lifter 78 in the direction shown in the arrow 81A.This moment, this device was in off position.It should be noted that: in case device of the present invention is in off position, the pressing detection button will cut little ice, this be since this moment latch plate 84 can not match with the inclined end portion of test button 22.After device is reset, test button 22 will be carried out cut-out function.
Part is in off position if open circuit, and (by promoting reset button) do not allow to reset in case GFCI device of the present invention is in off position; That is to say that if any of the part that opens circuit or a plurality of parts can not normally move, this device then can not be reset.In addition, if testing circuit can not true(-)running, this device can not be reset.Reset lockout of the present invention can mode initiatively realize its function, if part or testing circuit can not true(-)runnings if promptly open circuit, this reset lockout arranges that promising realization resets latch functions and one or more parts of particular design are reset to stop this device.This reset lockout also can passive mode realize its function, if if promptly any or a plurality of parts of any of testing circuit or a plurality of parts or the part that opens circuit can not normally move, this device then can not enter reset mode; This passive reset locking mode realizes in the present invention.For example, if following arbitrary parts---be that fault normally be moved or be existed to coil/core assembly (82,80) or latch plate/lifter assembly (84,78) or reset button/return pin (22,76) can not, this device then can not be reset.In addition, if detection arm (90) or test pin (92) irregular operating, this device can not be reset.
It should be noted that: tripper of the present invention has a trip portion that is independent of the part operation of opening circuit, and like this, under the situation that the part that opens circuit can not be moved, this device still can be opened circuit.Preferred situation is: this trip portion just as foregoing by manual activation (by pushing test button 22) and utilize mechanical part to cut off one or more conducting path.But this trip portion also can be utilized circuit and/or electromechanical compo to cut off phase thread path or median path or the two is all cut off.
Though used parts are electromechanical compo in nature in open circuit and device reset operation, but the application also can consider to utilize electric component, for example solid-state switch and auxiliary circuit and can form in conducting path and be electrically connected and cut off the other types parts that are electrically connected.
It should be noted that: tripper of the present invention can be to comprise that for example wiring is by the part of one or more line systems of house or other any known structure.Like this, system of the present invention has the conductive media (for example being used to carry the lead of electric current) that forms at least one circuit, and described circuit comprises that at least one is according to tripper of the present invention; Power device; Using electricity system and/or parts; That is to say that electric component, power device and/or system are connected by lead and form a circuit that comprises tripper of the present invention.Formed circuit is the system of the present invention that is supplied electric power.Therefore, if tripper detects from the fault in described electronic device, power device, the system (or predetermined state), system of the present invention will protect it by the electric power that cuts off them.In one embodiment, the tripper of using in described system can be a GFCI.
Though show, describe and pointed out essential characteristic of the present invention, will be appreciated that: under the situation that does not break away from essence of the present invention, those skilled in the art can omit, replace and change the form of described device and details and operation thereof.
Claims (12)
1. tripper comprises:
Housing;
The a pair of line terminal that is arranged in the described housing and is electrically connected to small part with power supply;
Be arranged in a pair of face terminals in the described housing to small part, can be when face terminals is electrically connected with described line terminal to the load transmission current;
Be used for a pair of electric conductor that line terminal is electrically connected with face terminals;
Be arranged in the part that opens circuit in the described housing, this opens circuit and partly comprises mechanical switch assemblies, latch piece and the lifter assembly of coil and removable core assembly, biasing; Wherein, described latch piece and described lifter flexibly and slidably are coupled, and described latch piece has a circular open, and described lifter also has a circular open; Removable iron core matches with latch piece, and lifter matches with described mechanical switch assemblies to match with the testing circuit that is used to detect predetermined state, and described lifter also matches so that line terminal is connected with face terminals with described a pair of electric conductor;
Reset portion, this reset portion comprises the reset button that links to each other with return pin, reset button and return pin are by mechanical bias, described return pin has the extended round flange from its end, when the circular open of the circular open of latch piece and lifter does not align, described round flange and latch piece interference; When described latch piece is cooperated by removable iron core, when the circular open of latch piece and the circular open of lifter align, described round flange and end be the circular open of the described latch piece of extend through and lifter then, the rollback effect of latch piece does not align the circular open of the circular open of described latch piece and lifter and described end and round flange is limited in below the latch piece, thereby allow the biasing of return pin and reset button and round flange is matched with lifter, this lifter combines with removable electric bridge and line terminal is electrically connected with face terminals.
2. tripper according to claim 1 is characterized in that: described predetermined state comprises earth fault, arc fault, device leak current fault, equipment leak current fault or immersion sensing fault.
3. tripper according to claim 1 also comprises a trip portion, this trip portion is used for the electric power between line disconnection terminal and the face terminals, described trip portion comprises a trip button, this trip button has inclined end portion and matches with latch piece and the circular open of latch piece and the circular open of lifter are aligned, thereby allows return pin and lifter to be separated and make line terminal and the face terminals disengaging interconnects.
4. tripper according to claim 1 also comprises a pair of panel terminal that is electrically connected with the spendable a pair of socket of user, and the metal structure of each panel terminal from be arranged in described housing extends out and form with this metal structure is whole.
5. tripper according to claim 4 is characterized in that: described a pair of electric conductor links to each other line terminal with panel terminal.
6. tripper according to claim 4, it is characterized in that: when described device resets, described a pair of electric conductor interconnects line terminal, face terminals and panel terminal, when detecting a predetermined state, the interconnecting of described a pair of electric conductor line disconnection terminal, face terminals and panel terminal.
7. tripper according to claim 1 also comprises the testing circuit that is used to detect described predetermined state appearance.
8. tripper comprises:
First electric conductor;
Second electric conductor;
The 3rd electric conductor;
The removable electric bridge that is electrically connected with first electric conductor, described removable electric bridge are electrically connected first, second and the 3rd electric conductor mutually, and cut off the electrical connection between first, second and the 3rd conductor when predetermined state occurs; And
Reset portion, after described predetermined state occurred, this reset portion was used to rebulid the electrical connection between first, second and the 3rd electric conductor.
9. tripper according to claim 8 also comprises the part that opens circuit, and when described predetermined state occurring, the described part that opens circuit is cut off the electrical connection between first, second and the 3rd electric conductor.
10. tripper according to claim 8 also comprises a reset lockout, and when described device can not move, this reset lockout stoped between described first, second and the 3rd electric conductor and rebulids electrical connection.
11. a tripper has:
First electric conductor;
Second electric conductor;
The 3rd electric conductor;
With the removable electric bridge that described first electric conductor is electrically connected, described removable electric bridge can make first, second and the 3rd electric conductor be electrically connected mutually, and can cut off the electrical connection between first, second and the 3rd conductor when predetermined state occurs;
Reset portion, after described predetermined state occurred, this reset portion was used to rebulid the electrical connection between first, second and the 3rd electric conductor; And
At least one power device is electrically connected with described tripper and forms a circuit.
12. the tripper according to claim 11 is characterized in that: this tripper is a ground-fault interrupter.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US44446903P | 2003-02-03 | 2003-02-03 | |
| US60/444,469 | 2003-02-03 | ||
| US10/692,056 | 2003-10-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1759511A CN1759511A (en) | 2006-04-12 |
| CN100492793C true CN100492793C (en) | 2009-05-27 |
Family
ID=36704046
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800066465A Expired - Fee Related CN100492793C (en) | 2003-02-03 | 2004-01-30 | Circuit interrupting device and system utilizing electromechanical reset |
| CNB2004800066770A Expired - Fee Related CN100533898C (en) | 2003-02-03 | 2004-01-30 | Circuit interrupting device and system utilizing bridge contact mechanism and reset lockout |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800066770A Expired - Fee Related CN100533898C (en) | 2003-02-03 | 2004-01-30 | Circuit interrupting device and system utilizing bridge contact mechanism and reset lockout |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN100492793C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102971821A (en) * | 2010-06-30 | 2013-03-13 | 伊顿公司 | Overload relay switch without springs |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7400477B2 (en) | 1998-08-24 | 2008-07-15 | Leviton Manufacturing Co., Inc. | Method of distribution of a circuit interrupting device with reset lockout and reverse wiring protection |
| CN100492793C (en) * | 2003-02-03 | 2009-05-27 | 立维腾制造有限公司 | Circuit interrupting device and system utilizing electromechanical reset |
| US7911746B2 (en) * | 2006-06-01 | 2011-03-22 | Leviton Manufacturing Co., Inc. | GFCI with self-test and remote annunciation capabilities |
| WO2008124962A1 (en) * | 2007-04-11 | 2008-10-23 | Hisetec Electronic Co., Ltd. | Trip for normal-open type ground fault circuit interrupter |
| WO2008124961A1 (en) * | 2007-04-11 | 2008-10-23 | Hisetec Electronic Co., Ltd. | Ground fault circuit interrupter with life checking and indicating circuit |
| CN102185222B (en) * | 2011-03-01 | 2013-08-28 | 浙江万盛电气有限公司 | Leakage protection socket with reverse wiring protection function |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4979070A (en) * | 1989-06-13 | 1990-12-18 | Bodkin Lawrence E | Automatic reset circuit for GFCI |
| US5185687A (en) * | 1991-03-28 | 1993-02-09 | Eaton Corporation | Chaos sensing arc detection |
| US5363269A (en) * | 1993-02-22 | 1994-11-08 | Hubbell Incorporated | GFCI receptacle |
| US5541800A (en) * | 1995-03-22 | 1996-07-30 | Hubbell Incorporated | Reverse wiring indicator for GFCI receptacles |
| CN1214154A (en) * | 1995-12-29 | 1999-04-14 | 塔瓦制造有限公司 | Ground fault circuit interrupter |
| CN1759513A (en) * | 2003-02-03 | 2006-04-12 | 莱维顿制造有限公司 | Circuit interrupting device and system utilizing bridge contact mechanism and reset lockout |
-
2004
- 2004-01-30 CN CNB2004800066465A patent/CN100492793C/en not_active Expired - Fee Related
- 2004-01-30 CN CNB2004800066770A patent/CN100533898C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4979070A (en) * | 1989-06-13 | 1990-12-18 | Bodkin Lawrence E | Automatic reset circuit for GFCI |
| US5185687A (en) * | 1991-03-28 | 1993-02-09 | Eaton Corporation | Chaos sensing arc detection |
| US5363269A (en) * | 1993-02-22 | 1994-11-08 | Hubbell Incorporated | GFCI receptacle |
| US5541800A (en) * | 1995-03-22 | 1996-07-30 | Hubbell Incorporated | Reverse wiring indicator for GFCI receptacles |
| CN1214154A (en) * | 1995-12-29 | 1999-04-14 | 塔瓦制造有限公司 | Ground fault circuit interrupter |
| CN1759513A (en) * | 2003-02-03 | 2006-04-12 | 莱维顿制造有限公司 | Circuit interrupting device and system utilizing bridge contact mechanism and reset lockout |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102971821A (en) * | 2010-06-30 | 2013-03-13 | 伊顿公司 | Overload relay switch without springs |
| CN102971821B (en) * | 2010-06-30 | 2016-09-21 | 伊顿公司 | Overload relay without spring switchs |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100533898C (en) | 2009-08-26 |
| CN1759513A (en) | 2006-04-12 |
| CN1759511A (en) | 2006-04-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100407354C (en) | GFCI of surface perforating device with bridge contact and automatic blocking protective socket used at the time of trip | |
| CA2515059C (en) | Circuit interrupting device and system utilizing electromechanical reset | |
| US7558034B2 (en) | Bi-directional ground fault circuit interrupter | |
| US7455538B2 (en) | Electrical wiring devices with a protective shutter | |
| CN100338711C (en) | Gfci receptacle having blocking means | |
| US8139328B2 (en) | Fault circuit interrupting device with symmetrical inputs | |
| US7737809B2 (en) | Circuit interrupting device and system utilizing bridge contact mechanism and reset lockout | |
| US20060139132A1 (en) | Circuit interrupting device with reverse wiring protection | |
| US7187526B2 (en) | Circuit interrupting device with lock out and reversible wiring | |
| US7715158B2 (en) | Circuit interrupter with live ground detector | |
| US20070268635A1 (en) | Bi-directional ground fault circuit interrupter | |
| WO2004070906A2 (en) | Gfci receptacle having blocking means | |
| WO2005099393A2 (en) | Circuit interrupting device with a single test-reset button | |
| CN100492793C (en) | Circuit interrupting device and system utilizing electromechanical reset | |
| CN101449442A (en) | Bi-directional ground fault circuit interrupter | |
| CN100521428C (en) | Circuit interrupting device with lock out and reversible wiring | |
| CN100444489C (en) | Circuit interrupting device with single throw, double mode button for test-reset function | |
| CN100533899C (en) | GFCI receptacle having plug blocking means | |
| CN100385593C (en) | GFCI receptacle having blocking means |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: DE Ref document number: 1089300 Country of ref document: HK |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: WD Ref document number: 1089300 Country of ref document: HK |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090527 |