CN101449442A - Bi-directional ground fault circuit interrupter - Google Patents
Bi-directional ground fault circuit interrupter Download PDFInfo
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- CN101449442A CN101449442A CNA2007800180290A CN200780018029A CN101449442A CN 101449442 A CN101449442 A CN 101449442A CN A2007800180290 A CNA2007800180290 A CN A2007800180290A CN 200780018029 A CN200780018029 A CN 200780018029A CN 101449442 A CN101449442 A CN 101449442A
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Abstract
The present invention relates to a family of resettable circuit interrupting devices that eliminates the need to rewire a resettable circuit interrupting device after it is installed and powered up to correct for a reverse wiring conditions.
Description
Technical field
The application relates to a series of circuit breakers of resetting and system, and it comprises ground fault circuit interrupter (GFCI), arc fault circuit-breaker (AFCI), immersion detection circuit-breaker (IDCI), utensil leakage circuit circuit breaker (ALCI), equipment leakage circuit circuit breaker (ELCI), circuit automatic circuit breaker, contact, latching relay and electromagnetic mechanism.More particularly, the application relates to circuit breaker, and it comprises the line side that can disconnect this device and the circuit breaking part of the conductive path between the load-side.
Background technology
Many electrical connection devices have the line side that can be connected in power supply, can be connected in one and the load-side of a plurality of loads and at least one conductive path between this line side and load-side.The electrical connection that the electric wire of the electric wire of supply capability or conduction is electrically connected on one or more loads is being connected in line side and load-side.The electrical connection device industry has shown the ever-increasing demand to circuit breaker or system, and this device or system construction become to disconnect the electric power such as the various loads of domestic electric appliance, consumption electric product and branch circuit.Specifically, for example, electrical code requires the circuit in Household bathroom and kitchen that ground fault circuit interrupter (GFCI) is installed.The more detailed description of GFCI device is disclosed in the U.S. Patent No. of owning together 4,595,894, and its whole contents is incorporated into that this is for reference.The GFCI device that can access at present, for example U.S. Patent No. 4,595, and the tripping mechanism that the device of describing in 894 (No. 894 patents) utilizes electricity to start is with the mechanically electrical connection between striping trackside and the load-side.This device for example can be reset after its tripping operation by Earth Fault Detection.In this device of in No. 894 patents, being discussed, be used to cause that the tripping mechanism that the machinery of circuit (that is the conductive path between line side and the load-side) disconnects comprises electromagnetic mechanism (or breaking coil).Testing button is used to test tripping mechanism, and circuit is used for the sensing fault, the electrical connection between line side and the load-side and the replacement button is used to reset.
Yet, the situation of the non-normal condition that caused by thunderbolt for example may take place, this may not only cause this device to be shocked by electricity and make this device tripping operation, but also the tripping mechanism that causes being used to circuit machinery is disconnected is damaged.This can take place when the user lacks knowledge.In this case, if GFCI trips, the user of the ignorant of GFCI may push the replacement button, and pushing the replacement button will not have that the device with inoperable tripping mechanism is reset again.
And, for supplying power to for example electric wire of GFCI device, may there be open neutral condition by insurance laboratory (UL) standard P AG943A definition.If there is open neutral condition in the neutral wire on the line side of GFCI device (relative with load-side), so such situation may take place: from supply of electric power to phase (or charged) electric wire of GFCI device by device load-side and the people again to the situation of ground connection formation current path.Exist under the situation of open neutral condition, even if open neutral condition may keep, the current GFCI device that has tripped also may be reset.
Its whole contents is incorporated into this U.S. Patent No. of owning together 6 for your guidance, 040,967 have described a series of circuit breakers of resetting, the ifs circuit breaking part is idle, if perhaps there is open neutral condition, this circuit breaker also can cut off the replacement part of this device.
More above-described circuit breakers except the line side with load-side is connected, also have the come-at-able load-side of user to connect.The come-at-able load-side of user connects and comprises that the user can externally be connected in one or more tie points of the electric power of supplying with from the line side.Load-side connects to be connected usually with the come-at-able load-side of user and is electrically connected.The example of sort circuit disconnecting apparatus is the GFCI socket, wherein the line side connects that to be connected with load-side be terminal screw, and the come-at-able load-side of user connects two holes or the Three-hole socket that normally is used in the electric power outlet, is used for utilizing usually the male tab of two pins or three-prong to be connected in electric device.As indicated, this device is connected in external cabling, connect so that line wires is connected in the line side, and load side wire is connected in the load-side connection.But such situation may take place: circuit breaker is connected in external cable improperly, makes load wires be connected in that the line side connects and the line side electric wire is connected in the situation that load-side connects.This is referred to as reverse wiring.Under the situation of circuit breaker reverse wiring, in one type of prior art syringe, even keep the error protection that load-side is connected, the error protection that the come-at-able load of user is connected may also be cancelled.And because error protection is cancelled, the user can make the user think that device is working properly, but in fact not be near terminal (that is, three holes or two spring hole scokets) with charged.In addition, because when reverse wiring, owing to do not allow to reset, some circuit breakers may be got rid of electric power.In this case, think that device is out of order to user or setter possible errors.
Therefore, need the device of correct wiring, and connect no matter that electric wire (load wires or line wires) is connected in the line side of device.Therefore need to be reversed the device of wiring.
Summary of the invention
The present invention relates to a series of circuit breakers of resetting, it is connected in the electric wire with input electric power by which terminal (line terminal or face terminals) that detects this circuit breaker, and lock those terminals in the line side that is connected to this device and be connected to other terminals of the load-side of this device, thereby avoid the situation of reverse wiring.This device has the replacement shut-off mechanism that prevents that when they work undesiredly they are reset.When device is not reset, there is not supply of electric power for come-at-able socket of the Any user on the panel that is arranged on this device and/or plug.Each 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 on power supply or load.Face terminals can be electrically connected on load or power supply.The user that panel terminal is electrically connected on the panel that is arranged on device can be near plug and/or socket.Line terminal, face terminals and panel terminal are electrically insulated from each other.Device of the present invention is made under tripped condition and is transported, that is, be not electrically connected between line terminal and face terminals, and be not electrically connected between face terminals and panel terminal.Therefore, in tripped condition, at least three group terminals are electrically insulated from each other.
Every pair of terminal has phase terminal and neutral terminal.When being connected to each other, the phase terminal of correspondence forms the phase conductive path.Equally, when being connected to each other, the neutral terminal of correspondence forms neutral conductive path.Preferably, the phase conductive path comprises one or more switching devices, and it can disconnect to produce electricity in the phase conductive path and interrupting, and can be closed to form electric continuity again in the phase conductive path.And neutral conductive path comprises one or more switching devices, and it can disconnect to produce electricity in neutral conductive path and interrupting, and can be closed to form electric continuity again in neutral conductive path.
Each also has two pairs of movable contacts device of the present invention, a pair of neutral terminal that is electrically connected on, and another is to being connected in phase terminal.Therefore when device is reset when power supply being electrically connected on the panel of device, movable contact is electrically connected on face terminals and panel terminal with line terminal.Movable contact is mechanically offseted away from face terminals and panel terminal.
In one embodiment, circuit breaker comprises that line terminal, movable contact, face terminals and panel terminal are at least partially disposed on housing wherein.Circuit breaker also comprises the circuit breaking part, and it is arranged in the housing and is configured to cause that electricity interrupts when predetermined state takes place between terminal.Circuit breaker also comprises the tripping operation part, reset part and testing circuit.
An embodiment utilization that is used for circuit breaker causes the electromechanical circuit breaking part that electricity interrupts between line terminal, face terminals and panel terminal.The replacement shut-off mechanism prevents to form again electric continuity between line terminal, face terminals and panel terminal, remove the inverter circuit breaking part and normally work.The part of resetting can be reset device, causes electric continuity between line terminal and face terminals, and at the electric continuity that causes of line terminal and panel terminal; That is, device is in setting or the replacement pattern.And, when being reset, device between face terminals and panel terminal, has electric continuity.Therefore the part of resetting forms electric continuity between line terminal, face terminals and panel terminal.The electromechanical circuit breaking part comprises latch plate and lifter assembly, coil and plunger assembly, mechanical switch assemblies, movable contact and testing circuit.
The part of resetting can comprise the replacement pin that is connected in the replacement button, and this button and replacement pin are mechanically setovered, and the replacement pin (for example has the flange that radially extends from the end of this replacement pin, annular flange flange or dish), be used for when device is in tripped condition and depresses the replacement button and latch plate and the interference of lifter assembly.The mechanical switch assembly that latch plate of being interfered and lifter assembly engage the detection trigger circuit.The ifs circuit breaking part is normally worked, and the testing circuit that is triggered makes coil block be coupled this testing circuit to be powered.Coil block with the power supply that is arranged on movable plunger wherein makes movable plunger engage latch jam plate, makes that the end of replacement pin and flange can be by the latch plate of temporarily alignment and the openings in the lifter assembly.This opening becomes and does not line up then, and the flange of replacement pin and end are blocked in below the lifter.After button has been depressed and when being released, the biasing of replacement pin makes the replacement pin be tending towards moving away breech lock and lifter assembly.When discharging the replacement part, with its interference flange as one man, the biasing of replacement pin makes it can promote latch plate and lifter assembly.Therefore, the lift portion of latch plate and lifter assembly engage movable contact, and this contact is electrically connected to each other line terminal, face terminals and panel terminal, therefore device are placed and set or reset configuration state.The ifs circuit breaking part is worked undesiredly, and then therefore not engage latch jam plate and lifter assembly of the plunger of coil block prevent that circuit breaker is reset.
This testing circuit comprises the various Electrical and Electronic elements of generations such as being used for detection of ground faults, arc fault, leakage current state, and these faults and state are called predetermined state hereinafter.Testing circuit is connected in the electromechanical circuit breaking part.When detecting predetermined state, testing circuit starts the electromechanical circuit-breaker, makes device be in tripped condition.
Tripped condition obtains by the tripping operation part of start-up circuit disconnecting apparatus.The tripping operation of circuit breaker partly is at least partially disposed in the housing, and is configured to cause in phase conductive path and/or neutral conductive path that electricity interrupts.When device detects predetermined state (for example earth fault) when be in the replacement pattern at device also tripped condition can take place.In one embodiment, the trip portion branch comprises and is connected in the testing button of trip pin that has cam or band angle part at the one end that the part of this cam or band angle can the engage latch jam plate when device is reset.When testing button at first was depressed and be released then, trip pin and testing button were mechanically setovered, and made trip pin be tending towards moving away breech lock and lifter assembly.When starting (that is, testing button is depressed) when device is in the replacement pattern simultaneously, the tripping operation part makes the cam portion engage latch jam plate of trip pin with lifter opening and the latch plate opening of temporarily aliging; The end and the flange of this feasible replacement pin are released below lifter, therefore no longer with lifter and the interference of latch plate assembly.As a result, lifter and latch plate no longer promote movable contact, and the biasing of movable contact makes them move away face terminals and panel terminal, make line terminal, face terminals and panel terminal break away from each other, therefore device are placed tripped condition.
Description of drawings
Describe the application's preferred embodiment below with reference to the accompanying drawings, wherein components identical gives identical Reference numeral, wherein:
Fig. 1 is the perspective view according to an embodiment of the application's ground fault circuit disconnecting apparatus;
Fig. 2 is the top view of the part of GFCI device shown in Figure 1, and wherein faceplate part is removed;
Fig. 3 is the decomposition diagram of panel terminal inner frame, face terminals and movable bridge;
Fig. 4 is the perspective view of layout of some elements of the circuit breaking part of device of the present invention;
Fig. 5 is the end view of Fig. 4;
Fig. 6 is a perspective view of resetting part of the present invention;
Fig. 7 is the decomposition diagram of the lifter/latch assembly of circuit breaker of the present invention;
Fig. 8 is used to avoid the testing circuit of reverse wired condition and the schematic diagram of switch latch circuit;
Fig. 8 A is the schematic diagram that is used to avoid another embodiment of the testing circuit of reverse wired condition and switch latch circuit;
Fig. 9 to Figure 14 illustrates when the event sequence of device of the present invention when tripped condition is reset;
Figure 15 to Figure 18 illustrates the event sequence that device of the present invention trips when being in Reset Status.
Embodiment
The application considers the various types of circuit breakers with at least one conductive path.Conductive path usually in the line side that is connected in electric power, be connected in the load-side of one or more loads and be connected between the user side of come-at-able plug of user or socket and divide.As indicated, the various devices in a series of circuit breakers of resetting can comprise: ground fault circuit interrupter (GFCI), arc fault circuit breaker (AFCI), immersion detection circuit breaker (IDCI), utensil leakage circuit circuit breaker (ALCI), equipment leakage circuit circuit breaker (ELCI).
For the application's purpose, shown in the accompanying drawings and described below circuit breaker in used structure or mechanism be included in the GFCI device, this GFCI device is suitable for being installed in the single group electrical terminal block that is used in the residential electricity wiring system for example.But the mechanism according to the application can be included in any device of the various devices in a series of circuit breakers of resetting.And more generally, the application's circuit breaker can be embodied as any device that has at least first, second and the 3rd electric conductor, and each electric conductor is at least partially disposed in the housing.These electric conductors are electric insulation each other, and wherein first conductor can be connected in electric power, second conductor can be connected in one or more loads, and the 3rd conductor configuration becomes the user come-at-able.Being called bipolar at least one pair of contact (the one end is connected in the power supply and first conductor) of singly throwing contact can be connected to each other first, second and the 3rd electric conductor, and when detecting fault or predetermined condition, described conductor is disconnected each other.
But more particularly, circuit breaker as 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.This at least one pair of line terminal allows electric power (for example alternating current (AC)) to be connected in this device, and at least one pair of face terminals allows external conductor or external device (ED) to be connected in this device.These connections can be the electric fasteners of for example external conductor being fixed or is connected in circuit breaker and conduction.The example of these connections comprises that terminal screw, lug plate, terminal and external plug are connected.This at least one panel or user's terminal that utilizes two pins or three-prong socket to implement usually makes the user electric device can be electrically connected on the GFCI device via two pins that cooperate with socket or three-prong male tab usually.
Feature described above can be included in any circuit breaker of resetting, but the cause in order to illustrate, and following description will be referred to the GFCI device.
In one embodiment, the GFCI device has circuit breaking part, replacement part, replacement shut-off mechanism and switch latch portion.The GFCI device also has the mechanical trip part.The GFCI device also has a pair of double pole single throw contacts, and it is connected in face terminals and panel terminal with line terminal when engaging.When double pole single throw contacts did not engage, line terminal, face terminals and panel terminal were electrically insulated from each other.Because panel terminal and face terminals and line terminal electric insulation will not have on panel terminal.When double pole single throw contacts did not engage and therefore line terminal, face terminals and panel terminal are electrically insulated from each other, this device was said to be and is in tripped condition.Here should be pointed out that and to replace double pole single throw contacts with movable bridge contact.
Circuit described herein disconnects and the part of resetting preferably uses the electromechanical element to disconnect (opening circuit) and to form line terminal of (closure) this device and the one or more conductive paths between the face terminals.But, can be used for disconnecting or closed conductive path such as the electric component of solid-state switch and support circuit.
Generally speaking, the circuit breaking part is used for when detecting fault (it is described as earth fault in this embodiment), the electric continuity in one or more conductive paths of automatic disconnection between line terminal and face terminals (that is, disconnecting conductive path).Between line terminal and face terminals, also disconnect electric continuity.The part of resetting is used for the conductive path of closed this disconnection.
In this structure, the operation of reset part and replacement cut-off parts is cooperated with the operation of circuit breaking part, so that the ifs circuit breaking part does not move and/or has open neutral condition, then the electric continuity in the conductive path of Duan Kaiing can not be reset.When the circuit breaking part did not move (be meant its any one or a plurality of element operate as normal not), device can not be reset.Mechanical trip part can be independent of the work of circuit breaking part and electric continuity between open-circuit line terminal, face terminals and the panel terminal.Therefore, under the situation of circuit breaking part irregular working, this device still can trip.
Get back to Fig. 1, the GFCI device has faceplate part or cover part 36 housing 12 removably fixed thereon.Faceplate part 36 has: the inlet port 16,18,24 and 26 that aligns with socket, to be used to admit the common or polarization pin of the male tab of seeing in the end of home devices electric wire (not shown) usually; And the ground pin admittance opening 17 and 25 that is used to hold three pin plug.The GFCI device also comprises the installation clamping plate 14 that are used for device is fixed in device box.
Still with reference to figure 1, the electrical connection of leading to existing family electric wiring forms via terminal screw 28 and 30, and wherein for example screw 30 is that input (or circuit) is connected, and screw 28 is to export (or load) to be connected.Screw 28 and 30 (via helicitic texture) is fastening terminal 32 and 34 respectively.But as disclosed herein, the GFCI device comprises and allows terminal 30 or terminal 28 to be connected in the switch latch circuit of circuit, thus screw 30 can be output be connected and screw 28 be input mutually or circuit connect. Terminal 32 and 34 is right half of terminal.Therefore two additional terminal screws and terminal (not shown) are arranged on the opposite side of device 10.These additional terminal screws provide the circuit connection to be connected with load neutral respectively.Should be pointed out that also terminal screw and terminal are the exemplary types that can be used in the binding post that electrical connection is provided.The example of the binding post of other types comprises dog screw, pressure clip, pressure plare, pushes type connection, tap and is connected contact pin fast.Panel terminal is embodied as and is used for the socket that cooperates with male tab.The depicted in greater detail of panel terminal is shown in Fig. 2.
With reference to figure 2, Fig. 2 illustrates the top view (not having faceplate part 36 and clamping plate 14) of GFCI device.Inner housing structure 40 provides the element of GFCI device platform disposed thereon.Replacement button 20 and testing 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 faceplate part 36 is formed by the extension 50A and the 52A of framework 48.Framework 48 is formed by electric conducting material, forms the socket that aligns with opening 16 and 24 by it.The socket that aligns with the opening 24 of faceplate part 36 is formed by the extension 50B and the 52B of framework 48.And framework 48 has flange, and flange end has connected conductive contact 56.Framework 46 is materials of conduction, forms the socket that aligns with opening 18 and 26 by it.The socket that aligns with the opening 18 of faceplate part 36 utilizes framework extension 42A and 44A structure.The socket that aligns with the opening 26 of faceplate part 36 utilizes extension 42B and 44B structure.Framework 46 has flange, and the end of flange has connected conductive contact 60.Therefore, framework 46 and 48 forms the panel terminal be embodied as the socket that aligns with the opening 16,18,24 and 26 of the faceplate part 36 of GFCI device 10.Face terminals 32 and line terminal 34 also are installed on the inner housing structure 40.Face terminals 32 has the extension, and its end is connected with the load contact 58 of conduction.Equally, face terminals 54 has the contact 62 connected extensions of conduction.Line terminal, face terminals and panel terminal are electrically insulated from each other, and are electrically connected to each other by a pair of movable bridge or the bipolar contact of single-throw.How relation between line terminal, face terminals and the panel terminal and they are connected to each other and are shown in Fig. 3.
With reference to figure 3, Fig. 3 illustrates panel terminal and the face terminals location relative to each other and the interaction of they and movable bridge 64,66.As noted above, can replace movable bridge with singly throwing the double-pole switch contact.Though line terminal is not shown, should be appreciated that they are electrically connected on an end of movable bridge. Movable bridge 64,66 is electric conductor normally, and its structure also is arranged to be connected in face terminals to major general's line terminal.Specifically, movable bridge 66 has sweep 66B and coupling part 66A.Sweep 66B is electrically connected on line terminal 34 (not shown).Equally, movable bridge 64 has sweep 64B and coupling part 64A.Sweep 64B is electrically connected on another line terminal 34 (not shown), and this another line terminal is arranged on the relative side of line terminal 34.The coupling part 66A of movable bridge 66 has two fingers, and each has the bridge contact 68,70 that is connected in its end.The coupling part 64A of movable bridge 64 has two fingers, and each has the bridge contact 72,74 that is connected in its end.Bridge contact 68,70,72 and 74 usefulness are than higher electric conducting material manufacturing.And face terminal contact 56 and 60 usefulness are than higher electric conducting material manufacturing.And load terminal contacts 58 and 62 usefulness are than higher electric conducting material manufacturing.Movable bridge is preferably with can making crooked flexible metal when being subjected to mechanical force.Coupling part 64A, the 66A of movable bridge are by mechanically downwards or along being setovered by the roughly direction shown in the arrow 67.When the GFCI device was reset, the coupling part that causes movable bridge was along being moved by the direction shown in the arrow 65, and in conjunction with face terminals and panel terminal, therefore line terminal, face terminals and panel terminal was connected to each other.Specifically, upwards (by the direction shown in the arrow 65) bending of the coupling part 66A of movable bridge 66 is so that contact 68 and 70 can be distinguished the contact 56 of engage frame 48 and the contact 58 of face terminals 32.Equally, upwards (by the direction shown in the arrow 65) bending of the coupling part 64A of movable bridge 64 is so that contact 72 and 74 engages the contact 62 of face terminals 54 and the contact 60 of framework 46 respectively.The coupling part of movable bridge is bent upwards by the breech lock/lifter assembly that is arranged on below this coupling part, wherein as below about Figure 14 discussed, when the GFCI device was reset, this assembly moved along the direction that makes progress (by the direction shown in the arrow 65).Should be pointed out that the contact of movable bridge engages the contact of face terminals or panel terminal when electric current flows between contact, this realizes by contact is contacted with each other.Cause that some elements that the coupling part of movable bridge moves upward are shown in Fig. 4.
With reference to figure 4, Fig. 4 illustrates the coil plunger combination that is installed on the printed circuit board (PCB) 38, and it comprises the bobbin 82 with cavity, and elongated cylindrical plunger 80 is mounted slidably therein.For illustrate clear for the purpose of, framework 48 and face terminals 32 do not illustrate.One end of plunger 80 is illustrated the outside that extends in the bobbin cavity.The other end (not shown) of plunger 80 is connected in or combined spring, and this spring provides suitable power, after the magnetic force that is used for producing when plunger flows owing to coil electricity draws in this cavity the part of stick harness is shifted onto the outside of bobbin cavity.Electric wire (not shown) roll 82 twines to form coil.Be wrapped on the bobbin 82 electric wire in order to illustrate clearly cause, not illustrate.Lifter 78 and breech lock 84 assemblies are shown, its mid-riser 78 be positioned at movable bridge below. Movable bridge 66 and 64 utilizes mounting bracket 86 (only illustrating) fixing.Mounting bracket 86 also is used for line terminal 34 and another line terminal (not shown) are fixed in the GFCI device.Should be appreciated that another mounting bracket 86 that is used for fixing movable bridge 64 be positioned to shown in mounting bracket directly relative.Replacement button 20 has the replacement pin 76 that engages lifter 78 and breech lock 84 assemblies, and this will be discussed in more detail below.
With reference to figure 5, Fig. 5 illustrates the end view of Fig. 4.When coil electricity, plunger 80 along the direction shown in the arrow 81 by in the pull-in winding.The coupling part 66A that movable bridge 66 is shown is by (along by the direction shown in the arrow 85) biasing downwards.Although do not illustrate, the coupling part of movable bridge 64 is biased equally.The part of mechanical switch (test arm 90) is illustrated below the part that is positioned at lifter 70.Should be pointed out that because framework 48 is not shown, so face terminal contact 56 is not illustrated yet.
With reference now to Fig. 6,, Fig. 6 illustrates with respect to bobbin 82, replacement button 20 and replacement pin 76 location lifters 78, breech lock 78 assemblies.Should be pointed out that the replacement pin has bottom 76A and disk-shaped flange 76B.Should be pointed out that flange 76 can be an Any shape.The disc-like shape flange here is a specific embodiment of the type of operable flange.The bottom 76A of replacement pin and flange 76B are arranged to so that extend through the opening of the alignment of lifter 78 and breech lock 84.Also illustrate the mechanical switch assembly be positioned at lifter 78 a part below.The mechanical switch assembly comprises test arm 90 and test pin 92, and it is used to cause that tripped condition takes place.Testing button 20 and replacement pin 76 usefulness spring coil (not shown) are setovered along the direction that makes progress (by the direction shown in the arrow 94).The test arm 90 of mechanical switch is also by to upper offset.When test arm 90 is pushed by (by the direction shown in the arrow 94A) downwards, it will be tending towards upwards (by the direction shown in the arrow 94) and move to initial position when discharging.Same when replacement button 20 is pressed (by the direction shown in the arrow 94A), it is by along being moved and will be turned back to its initial position by the direction shown in the arrow 94.Latch plate 84 and lifter 78 assemblies are installed on bobbin 82 tops.Have only the part of lifter 78 to be illustrated, so as diagram lifter 78 how engage test arm 90 and latch plate 84 how in conjunction with lifter 78.Physical relationship between latch plate 84 and the lifter 78 is shown in Fig. 7.
With reference now to Fig. 7,, Fig. 7 illustrates latch plate 84 and how to be promoted and to be slidably mounted on the lifter 78 by spring.Latch plate 84 has opening 84B and spring coil 84A and is arranged on wherein another opening 84D.Latch plate quarter butt 84C is used to admit the end of spring coil 84A, and the other end of spring coil 84A partly engages with the pallet of lifter 78.Latch plate 84 has the hook portions 84E that is used to engage testing button 22, and this will at length discuss with reference to Figure 15 below.When two openings were in alignment with each other, though be not the part of latch plate/lifter assembly, the replacement pin 76 with bottom 76A and flange 76B was configured to extend through the opening 78A of lifter 78 and the opening 84A of latch plate 84.When the plunger 80 engage latch jam plates 84 of plunger coil assembly, two openings become and are in alignment with each other, and this will be described below.When electric circuit inspection during the energising of coil detected circuit, makes plunger be drawn in the cavity of bobbin 82 to fault or other predetermined state.In the embodiment that is discussed, the predetermined state that is detected is an earth fault.Predetermined state can be the fault of any kind, for example arc fault, equipment fault, appliance leakage fault or immersion detection fault.Usually, fault is meant that circuit breaker has detected precarious position and or plan to make any load that is connected in this device via face terminals and/or panel terminal to break away from power supply.Testing circuit and switch latch circuit are shown in Fig. 8.
With reference now to Fig. 8,, Fig. 8 illustrates testing circuit, and it comprises differential transformer, ground connection/neutrality (G/N) transformer, is used to detect electric current and in case detects electric current integrated circuit (IC)-1, full wave bridge rectifier D3, D4, D5 and D6, the surgesuppressor MV1 that is used to absorb the extreme power level that may appear at the line terminal place, various filtering coupling capacitor C1, C9, gate semiconductor device Q1, relay coil assembly K1, various current-limiting resistance R1, R4 and the pressure limiting Zener diode of output voltage afterwards.The mechanical switch that comprises test arm 90 and test pin 92 is connected in line terminal in the mode of connecting with current-limiting resistance R4 conductor is shown.It also can be that the double pole single throw switch contact F of bridge-type terminal and G and J and H are connected in panel terminal and face terminals with line terminal.When disconnecting, the double pole single throw switch contact is electrically insulated from each other line terminal, face terminals and the panel terminal of socket, and when closed, line terminal, face terminals and the panel terminal of socket is electrically connected to each other.Utilize GFCI, when the predetermined state that takes place such as earth fault, the difference of current amplitude appears between two line terminals.This difference between current shows as the net current that is detected by differential transformer, and flows to integrated circuit (IC)-1.Integrated circuit (IC)-1 can be any integrated circuit that is generally used for ground fault circuit made of national semiconductor maker or other semiconductor makers who knows (for example, LM-1851).According to the electric current that differential transformer provides, integrated circuit (IC)-1 produces voltage on the pin 1 of the gate pole that is connected in Q1, and Q1 connects.Full wave bridge rectifier D3-D6 has direct current (DC) side of the anode that is connected in Q1.When Q1 connected, from the DC starting relay K1 of full-wave rectifier, relay K 1 made the contact of double pole single throw switch remove electric power from the panel terminal and the face terminals of socket.Relay K 1 has bobbin, coil and is coupled plunger part with the contact of mobile double pole single throw switch.Diode D1 carries out rectification function, is used for keeping to the IC-1 service voltage when Q1 connects.When mechanical switch 90 closures, when current imbalance on the line terminal conductors is detected by differential transformer, also can starting relay K1.The G/N transformer detects the long-range earthed voltage may appear on one of them face terminals conductor, and when detecting long-range earthed voltage starting relay K1 again, provide electric current to IC-1.
Testing circuit engages the circuit breaking part of the GFCI device that makes this device tripping operation.And, after the tripping operation of GFCI device, do not cut off if as following the discussion, start to reset, then testing circuit can be reset the GFCI device.Under tripped condition, line terminal, face terminals and panel terminal are electrically insulated from each other.GFCI disclosed herein transports under tripped condition.The circuit breaking part comprises coil and plunger 80 assemblies, latch plate 84 and lifter 78 assemblies, and mechanical switch 90,92.
By means of the present invention, disclose and prevented that GFCI is reversed the switch latch circuit 100 of wiring, no matter which screw terminal (being used for the screw terminal of circuit or the screw terminal of load) is connected in line wires.For the present invention, the electric wire connection that is connected in two groups of screw terminals on the GFCI is interchangeable now.Line conductor (promptly being connected in the conductor of power supply) can be connected in any one group of screw terminal on the GFCI now, and load conductor can be connected in another group screw terminal.No matter how line conductor and load conductor are connected in GFCI, which terminal the switch latch circuit will detect and be connected in line wires, and testing circuit is locked in those terminals, so that GFCI can provide earth fault protection according to design work.Switch latch circuit 100 is arranged in the GFCI, and when supply capability, discerns which group screw terminal and be connected in power supply, and automatically that group screw terminal is connected in the correct group of the input terminal of GFCI socket.
Continuation is with reference to figure 8, and the GFCI socket has one group of panel terminal 102,104 of the slide plate that is fit to the admittance plug, and 106, the 108 and second groups of screw terminals of first group of screw terminal (A) (B) 110,112 that are arranged on the socket rear portion.
In Fig. 8, in order to illustrate purpose, winding 114 and 116 be shown as separately and be coupled in sets of contacts separately.But among the disclosed here embodiment, winding 114,116 is arranged on the same fuse and along opposite direction and twines.Therefore, when winding 116 energising, plunger (it is two single plungers that winding is shared) moves moving to the left side movable contact 126,128,136 and 138, and contacts with fixed contact.Therefore, when solenoid 116 energisings, movable contact 126 engages contact 130, and movable contact 128 engages contact 132, and movable contact 136 engages contact 140, and movable contact 138 engages contact 142.In the same way, when solenoid 114 energisings, all movable contacts are pushed, to move to the right side, and movable contact 126 engages contact 132, movable contact 128 engages contact 134, and movable contact 136 engages contact 142, and movable contact 138 engages contact 144.Should be pointed out that 132 pairs of movable contacts 126 of fixed contact and 128 are shared, and sequentially engaged, and 142 pairs of movable contacts 136 of fixed contact and 138 are shared, and sequentially engaged by movable contact 136 and 138 by movable contact 126 and 128.
Solenoidal plunger can be coupled engaging for example permanent magnet or any other structure, plunger is kept or at its extended position or at its retracted position.As will be illustrated below, when electric power at first puts on the GFCI socket, have only one of solenoid 114 and 116 to be energized, and at this moment, the rear terminal group that is connected in power supply at first be connected in the electric power admittance terminal of GFCI socket.
In the embodiment that utilizes single winding or mechanism, a kind of structure can be set, it makes winding (winding 114 or winding 116) break away from the screw contact that is connected in power supply.A kind of such structure can be the small-power resistance that will burn (with fuse of being disconnected etc.).This will help mechanism is locked in the position of selection.Have two windings and GFCI at the switch latch circuit 100 of GFCI and remove and be installed in another position with the position that circuit separates from first winding wherein, perhaps be removed and be reinstalled under the situation of same position, if electric power puts on second winding of mechanism, then the mechanism or second winding will be reorientated contact so that power supply correctly is connected in the GFCI socket, and ownly then break away from power supply.Therefore.Utilize two windings, GFCI can be repositioned at another position, and still GFCI correctly be connected in power supply, and do not worry that GFCI can reverse wiring.
Resistance 120,122 is used to limit the electric current and the diode 118,122 that lead to winding provides DC to winding 114,116.Clearly, if winding is configured to the work with AC, then diode can be removed.As noted above, resistance should be that size is made after the winding that connects is energized and burnt or disconnect.
With reference to figure 8A, Fig. 8 A illustrate GFCI wherein manually operate with avoid GFCI to install and energising after the embodiment of reverse wired condition.In this embodiment, can be connected, so that movable contact 126,128,136,138 is switched to the left side or the right side, to contact with first group or second group of fixed contact from the approaching manual operation switch 133 of the panel of GFCI.Originally, setter is wired to line conductor and phase conductor with GFCI, and connects the power supply of GFCI then.Here should be understood that GFCI supplies with to the buyer usually under its tripped condition.Therefore after the energized, setter must be pushed the replacement button on the GFCI, is connected in power supply with panel terminal and circuit downstream with GFCI.If testing button is jumped out suddenly when the replacement button is depressed, electric power will appear at the panel terminal place of GFCI and the circuit place in GFCI downstream, and GFCI is with operate as normal.But, if testing button is not jumped out suddenly, then there is not electric power to appear on the panel terminal and circuit downstream of GFCI, so, GFCI is by reversal connection.In order to correct this reverse wired condition, setter can be operated its another position by approaching switch 133 simply on the panel of GFCI, GFCI correctly is connected in phase conductor and neutral circuit conductor and load conductor.Now, when setter is pushed the replacement button, testing button will be jumped out suddenly and panel terminal and the circuit downstream of GFCI will have.
Still with reference to figure 8A, when switch 133 moved to the left side, movable contact 126,128,136 and 138 moved to the left side and makes and contacts with first group of fixed contact.Therefore, when switch moved to the left side, movable contact 126 engaged contact 130, and movable contact 128 engages contact 132, and movable contact 136 engages contact 140, and movable contact 138 engages contact 142.In the same way, when switching tube 133 moved to the right side, movable contact was pushed to move to the right side, and movable contact 126 engages contact 132, movable contact 128 engages contact 134, and movable contact 136 engages contact 142, and movable contact 138 engages contact 144.Therefore should be pointed out that fixed contact 132 is that shared contact is sequentially engaged by movable contact 126 and 128, and 142 pairs of movable contacts 136 of fixed contact and 138 are shared, and are sequentially engaged by movable contact 136 and 138.Switch 133 can be toggle switch, rotary switch etc., and it can enough hands or instrument direct control.
In Fig. 8 and 8A, differential transformer 152,154 and contact F, G, J and H are elements common in the GFCI socket, and their connection and operation illustrate and be described in the U.S. Patent No. of owning together 6,246 more fully, in 558, its whole contents is incorporated into this for your guidance.When the GFCI socket conducted electricity, contact F, G, H and J were all closed.When the tripping operation of GFCI socket, when therefore non-conductive, contact F, G, H and J all disconnect.
Disclosed the present invention operates as follows.GFCI socket with switch latch circuit 100 makes any one group of screw terminal (the terminal A of GFCI or terminal B) be connected in power supply.The GFCI that is not installed on the wall provides from manufacturer or from any supplier or retailer with tripped condition.Just, contact F, G, H and the J among the GFCI all disconnects.Setter is installed in the GFCI of tripped condition in the wall box, and one group of electric wire is connected in rear screw terminals (A) 106,108; Another group electric wire is connected in screw terminal (B) 110,112.Setter does not need to know which electric wire that is connected to GFCI is the electric wire that is connected in power supply, does not need to know which group electric wire is connected in the downstream lead-out wire.After line wires and load wires were connected in the GFCI socket, setter was a power on circuitry.The electric wire that supposition now is connected in rear terminal (B) 110,112 is connected in power supply, and the electric wire that is connected in rear terminal (A) 106,108 is connected in the downstream lead-out wire.
For the embodiment of Fig. 8, when being power on circuitry, voltage puts on terminal 110 and 112, and winding 116 is energized, and each movable contact 136,138,126 and 128 is pushed to move to the left side.Therefore, movable contact 136,138 present engage fixed contacts 140,142 respectively; And movable plug 126,128 is engage fixed contacts 130,132 respectively.Phase signals on the terminal 110 is carried and is appeared at now on the contact F and G of disconnection by contact 132,128.Neutral signal on the terminal 112 is carried and is appeared at now on the contact H and J of disconnection by contact 142,138.As noted above, contact F, G, H and J disconnect, and reason is that GFCI is in the trade and with contact F, G, H and J and is in its off-state and offers setter.After electric power was supplied with GFCI, resistance 124 burnt or disconnection and winding 116 and power supply disengagement.In addition, setter will be pushed the replacement button on the panel of GFCI.Contact F, G, H and J among the GFCI is delivered to rear terminal 106 with the phase signals on closure and the contact F by contact 126,130.Simultaneously, the voltage on the contact G is transported to the terminal 102 on the panel of GFCI, as the situation of phase signals, will be from the neutral signal of terminal 112 through contact H, and be fed to rear terminal 108 by contact 136; Simultaneously, neutral signal will be delivered to the panel terminal 104 of socket through contact J.
Our supposition now connects described unlike top, and setter connects GFCI so that electric power puts on rear terminal (A) 106,108, and the load wires that is connected in the downstream lead-out wire is connected in rear terminal (B) 110,112.Remember that when GFCI was installed in the wall box, it was in tripped condition, and when electric power at first applied, winding 114 was energized and all movable contacts 126,128,136 and 138 are pushed to move to the right side.Phase signals on the terminal 106 is transported to the contact H and the J of disconnection by contact 134,128, and the neutral signal on the terminal 108 offers contact F, the G of disconnection by contact 134,128.At this moment, because GFCI is not reset, contact F, G, H and J disconnect, and do not have electric power to appear on the rear terminal (B) or on the panel terminal 102,104 of GFCI socket.And after the very short time interval, resistance 120 burns or disconnects winding 114 and power supply are broken away from.Therefore, when the replacement button on the panel of setter pushing GFCI, contact F, the G on the GFCI, H and J closure, and phase current will flow through the contact F of closure, the terminal 110 that contact 126 and 132 arrives rear terminal B.Simultaneously, phase current will flow through the contact 102 of contact G to panel terminal.In an identical manner, the contact 136 and 142 of Bi He contact H by closure is connected in the neutral terminal 112 of rear terminal B with neutral terminal 108; And closed contact J is connected in panel terminal 104 with neutral terminal 112.
As noted above, for the embodiment of Fig. 8 A, if GFCI is reversed wiring, setter moving switch 133 simply arrives its another position to eliminate reverse wired condition.
To Figure 14, Fig. 9 to Figure 14 illustrates the order how GFCI is reset from tripped condition with reference to figure 9.When the GFCI device was in tripped condition, line terminal, face terminals and panel terminal were electrically insulated from each other, and reason is that movable bridge does not engage any terminal.With reference to figure 9, Fig. 9 illustrates the location of replacement button 20, replacement pin 76, replacement pin bottom 76A and dish 76B when this device is in tripped condition.In tripped condition, the lifter 78 that is positioned at below the movable bridge (not shown) does not engage movable bridge.Replacement button 20 is in its position that fully makes progress.Breech lock 84 and lifter 78 are that such opening of breech lock 84 and lifter 78 that makes does not line up, and make dish 76B can not pass through these openings.And the part of lifter 78 is positioned at directly over the test arm 90, but engage test arm 90 not.
In Figure 10, in order to start the replacement of GFCI device, the button 20 of resetting as shown in the figure be depressed (along by the direction shown in the arrow 94A) flange 76B and latch plate 84 are interfered, this is pressed on the test arm 90 of mechanical switch lifter 78 downwards.As a result, test arm 90 contacts (see figure 6) with test pin 92.
In Figure 11, when test arm 90 contacted with test pin 92, testing circuit was triggered as mentioned above, to coil electricity 80 moments of plunger are drawn in the bobbin 82 by ground, engage latch jam plate 84, more particularly, along promoting latch plate 84 by the direction moment ground shown in the arrow 81.
In Figure 12, latch plate 8 slides along lifter 78 (along by the direction shown in the arrow 81) when being promoted by plunger 80, so that with its opening and lifter register, make the flange 76B of replacement pin and bottom 76A extend through opening 84B and 78A (see figure 7).
In Figure 13, latch plate is (along by the direction shown in the arrow 81A) recession back, and when discharging the replacement button at that time, test arm 90 is also rebounded, and breaks away from from test pin 92.In Figure 14, the recession of latch plate 84 causes that opening 84B does not line up with opening 74A again, therefore flange 76B is blocked in lifter 78 and latch assembly below.When the replacement button was released, the biasing rising lifter and the latch assembly of the replacement pin 76 consistent with the flange 76B that is blocked made lifter (being positioned at below the movable bridge) engage movable bridge 66,64.Specifically, coupling part 66A, the 64A of movable bridge 66,64 causes that along be bent (see Fig. 3 and front discuss accordingly) respectively by the direction shown in the arrow 65 line terminal, face terminals and panel terminal are electrically connected to each other.GFCI is in the replacement pattern now, means that line terminal, face terminals and panel terminal are electrically connected to each other, and feasible electric power from line terminal can be provided to face terminals and panel terminal.GFCI will remain on the replacement pattern and detect fault up to testing circuit, or by pushing testing button 22, GFCI on purpose trips.
When testing circuit detects such as the state of the earth fault of GFCI or other states (arc fault for example, immersion detection fault, appliance leakage fault, the equipment leak current fault) time, testing circuit is given coil electricity, make plunger 80 engages receptacle 84, cause latch openings 84B to align with lifter opening 78A, the bottom 76A and the dish 76B of replacement pin are escaped below lifter, cause that lifter is from double pole single throw switch contact or movable bridge 64,66 break away from, since their biasing, double pole single throw switch contact or movable bridge 64,66 move away face terminal contact and load terminal contacts.As a result, line terminal, face terminals and panel terminal are electrically insulated from each other, and therefore the GFCI device is in tripped condition or tripping operation situation (see figure 9).
By pushing testing button 22, GFCI device of the present invention also can enter tripped condition.In Figure 15 to Figure 18, illustrate how this device can utilize the operating sequence of testing button 22 tripping operations.In Figure 15, when device is in the replacement pattern, depress testing button 22.Testing button 22 has testing button pin part 22A and connected cam end portion 22B, and along upwards mechanically being setovered by the direction shown in the arrow 94.Cam end portion 22B is preferably cone shape, makes when it engages with the hook end 84E of latch plate 84, owing to the angle of the end of testing button pin 22A produces cam.
In Figure 16, when testing button 22 when (along by the direction shown in the arrow 94A) promotes downwards, cam is a latch plate 84 along by the moving of the direction shown in the arrow 81, and makes latch plate opening 84B align with lifter opening 78A.
In Figure 17, the alignment of opening 78A, 84B makes bottom 76A and dish 76B escape below lifter of replacement pin, cause that lifter breaks away from from movable bridge 64,66, because their biasing, movable bridge 64,66 moves away face terminal contact and load terminal contacts (see figure 3).Testing button 22 is in the position that makes progress fully now.As a result, line terminal, face terminals and panel terminal are electrically insulated from each other, and therefore the GFCI device is in tripped condition or tripping operation situation (see figure 9).In Figure 18, testing button 22 is released, make its bias it can be made progress (along by the direction shown in the arrow 94) move, and break away from from the hook portions 84E of latch plate 84.Latch plate is along by the direction shown in arrow 81A recession, and the opening that therefore causes latch plate 84 does not line up with the opening of lifter 78 again.This device is in tripped condition now.Should be pointed out that in case device of the present invention is in after the trip position, press testing button and will not carry out any function because this position latch plate 84 can not tested button 22 the engaged at end of band angle.Testing button 22 will be carried out trip avoidance function after this device has been reset.
The ifs circuit breaking part is idle, in case be in trip position, GFCI device of the present invention can not (by pushing replacement button) be reset; That is, any one of ifs circuit breaking part or a plurality of element irregular working, device can not be reset.And if the testing circuit irregular working, device can not be reset.Replacement shut-off mechanism of the present invention can realize in reliable mode, the one or more elements that cut off function of wherein specifically being configured for resetting be arranged to so that, if ifs circuit breaking part or testing circuit irregular working prevent that this device is reset.The replacement shut-off mechanism also can also realize with passive mode, if one or more element cisco unity malfunctions of one or more elements of testing circuit or ifs circuit breaking part wherein, this device can not enter the replacement pattern; Realize this passive replacement cutting-off method in the present invention.If any one irregular working in for example following element, or have wrong function, this device does not enter the replacement pattern, and described element is coil/plunger assembly 82,80 or latch plate/lifter assembly 84,78 or replacement button/replacement pin 22,76.And if test arm 90 or test pin 92 irregular workings, this device can not be reset.
Should be pointed out that circuit breaker of the present invention has the tripping operation part that is independent of the work of circuit breaking part, therefore, become under idle situation that this device still can trip at the circuit breaking part.Preferably, tripping operation part is as mentioned above with manually booting (by pushing testing button 22) and disconnecting one or more conductive paths with mechanical organ.But the tripping operation part can disconnect phase conductive path or neutral conductive path or this two kinds of conductive paths with circuit and/or electromechanical compo.
Though, in circuit disconnection and device used element of replacement operating period is electromechanical property, but the present invention also considers and utilizes electric component, for example solid-state switch and support circuit, and the element that can in conductive path, form electric continuity and disconnect the other types of the electric continuity in the conductive path.
Should also be noted that circuit breaker of the present invention can be a part that for example comprises by the system of house or the one or more circuit by any other known structural wiring.Therefore, system of the present invention constructs with the conducting medium (for example, being used for the electric wire of transmission current) that forms at least one circuit, and this circuit comprises at least one circuit breaker of the present invention, electric device, electrical system and/or element; That is, electric component, electric device and/or system can interconnect with the electric wiring that forms circuit, and this circuit also comprises circuit breaker of the present invention.The circuit that forms is the system of the present invention to its supply capability.The ifs circuit disconnecting apparatus detects fault (or predetermined state) from any one of element, system or electric device, system of the present invention therefore by with it with the power supply disengaging and can protect its element, system or electric device.In one embodiment, used circuit breaker can be GFCI in system.
Though described and pointed out functional characteristic of the present invention, but be to be understood that, those skilled in the art can to described and illustrated device in the form and details with and operation on carry out any omission and substitute and revise, and do not break away from spirit of the present invention.
Claims (18)
1. a circuit breaker comprises:
Housing,
First pair of terminal, it is at least partially disposed in the described housing, and can be the line terminal of accepting electric power from circuit, or electric power transfer is given the face terminals of load;
Second pair of terminal, it is at least partially disposed in the described housing, and delivers power to load when described first pair of terminal connects as line terminal, is line terminal when described first pair of terminal connects as face terminals perhaps;
A pair of electric conductor, it is arranged in the described housing, is used for first pair of terminal and second pair of terminal are electrically connected;
The circuit breaking part, it is arranged in the described housing and is configured to and causes that electricity interrupts in the described a pair of electric conductor between described first pair of terminal and described second pair of terminal;
The switch latch circuit, it is arranged in the described housing, and be coupled in identification described first pair of terminal and the second pair of terminal which to being connected as line terminal, and this that will be identified as line terminal is connected in line cut-out to terminal as line terminal, and another is connected in circuit breaker to terminal as face terminals; And
The replacement part, it is at least partially disposed in the described housing and is configured to set up electric continuity between described first pair of terminal and described second pair of terminal.
2. circuit breaker according to claim 1, wherein said circuit breaking part also comprises bridge contact.
3. circuit breaker according to claim 1, wherein said circuit breaking part also comprises the double pole single throw switch contact.
4. circuit breaker according to claim 1, wherein said switch latch circuit also comprises:
First latch, it has coil and fixed contact and movable contact, and wherein said coil couples first pair of terminal across, and described contact is lockable; With
Second latch, it has coil and fixed contact and movable contact, and wherein said coil couples second pair of terminal across and described contact is lockable.
5. circuit breaker according to claim 4, the coil of wherein said first latch and a fusible component coupled in series; And
The coil of described second latch and a fusible component coupled in series.
6. circuit breaker according to claim 5, the fusible component of wherein said first latch is configured to, when first pair of terminal is connected when accepting the electric power from circuit, becomes nonconducting and make the cross-coupled disengaging of coil and first pair of terminal.
7. circuit breaker according to claim 5, the fusible component of wherein said second latch is configured to, when second pair of terminal is connected when accepting the electric power from circuit, becomes nonconducting and make the cross-coupled disengaging of coil and second pair of terminal.
8. circuit breaker according to claim 6, wherein first pair of terminal is connected to accept the electric power from circuit, and the movable contact of described first and second latch is pushed to primary importance.
9. circuit breaker according to claim 7, wherein second pair of terminal is connected to accept the electric power from circuit, and the movable contact of described first and second latch is pushed to the second place.
10. circuit breaker according to claim 1, wherein said switch latch circuit also comprises:
First relay, it has coil and fixed contact and movable contact, and wherein said coil couples first pair of terminal and described contact across; With
Second relay, it has coil and fixed contact and movable contact, and wherein said coil couples second pair of terminal and described contact across.
11. circuit breaker according to claim 10, wherein said relay are lockable relays.
12. circuit breaker according to claim 11, wherein said first and second relays are AC relays.
13. circuit breaker according to claim 11, wherein said first and second relays are DC relays.
14. circuit breaker according to claim 1, wherein said switch latch circuit comprises solid state device.
15. circuit breaker according to claim 1, wherein said switch latch circuit comprises at least one hand-operating device.
16. a circuit breaker comprises:
Housing,
First pair of terminal, it is at least partially disposed in the described housing, and can be the line terminal of accepting electric power from circuit, or electric power transfer is given the face terminals of load;
Second pair of terminal, it is at least partially disposed in the described housing, and delivers power to load when described first pair of terminal connects as line terminal, is line terminal when described first pair of terminal connects as face terminals perhaps;
At least one pair of panel terminal, it can be electrically connected on the come-at-able plug of at least one user;
A pair of electric conductor, it is arranged in the described housing, is used for first pair of terminal, the second pair of terminal and panel terminal are electrically connected;
The circuit breaking part, it is arranged in the described housing and is configured to and causes that electricity interrupts in the described a pair of electric conductor between described first pair of terminal, described second pair of terminal and described at least one pair of panel terminal;
Be arranged on the switching circuit in the described housing, it is coupled to first pair of terminal or the second pair of terminal is connected into line terminal as this circuit breaker, and another is connected into face terminals as this circuit breaker to terminal; And
The replacement part, it is at least partially disposed in the described housing and is configured to set up electric continuity between described first pair of terminal, described second pair of terminal and described at least one pair of panel terminal.
17. circuit breaker according to claim 16, wherein said switching circuit is manually operated.
18. circuit breaker according to claim 17, wherein said switching circuit can be approaching from the panel of housing.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US74758406P | 2006-05-18 | 2006-05-18 | |
| US60/747,584 | 2006-05-18 | ||
| US11/750,286 | 2007-05-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101449442A true CN101449442A (en) | 2009-06-03 |
Family
ID=40743834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007800180290A Pending CN101449442A (en) | 2006-05-18 | 2007-05-18 | Bi-directional ground fault circuit interrupter |
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| Country | Link |
|---|---|
| CN (1) | CN101449442A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104011818A (en) * | 2011-03-09 | 2014-08-27 | 汤姆逊许可公司 | Set top box having reset button and light guide |
| CN111954338A (en) * | 2019-04-30 | 2020-11-17 | 朗德万斯有限责任公司 | Driver circuit, lamp and method of resetting a controller of a lighting device |
| CN113555857A (en) * | 2021-07-02 | 2021-10-26 | 西安交通大学 | Rapid fusing device based on arc voltage enhanced transfer |
-
2007
- 2007-05-18 CN CNA2007800180290A patent/CN101449442A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104011818A (en) * | 2011-03-09 | 2014-08-27 | 汤姆逊许可公司 | Set top box having reset button and light guide |
| US9363547B2 (en) | 2011-03-09 | 2016-06-07 | Thomson Licensing | Set top box having reset button and light guide |
| CN111954338A (en) * | 2019-04-30 | 2020-11-17 | 朗德万斯有限责任公司 | Driver circuit, lamp and method of resetting a controller of a lighting device |
| CN113555857A (en) * | 2021-07-02 | 2021-10-26 | 西安交通大学 | Rapid fusing device based on arc voltage enhanced transfer |
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Application publication date: 20090603 |