CN101484961A - Ground fault circuit interrupter with reverse wiring and end-of-life protection - Google Patents
Ground fault circuit interrupter with reverse wiring and end-of-life protection Download PDFInfo
- Publication number
- CN101484961A CN101484961A CNA2006800548787A CN200680054878A CN101484961A CN 101484961 A CN101484961 A CN 101484961A CN A2006800548787 A CNA2006800548787 A CN A2006800548787A CN 200680054878 A CN200680054878 A CN 200680054878A CN 101484961 A CN101484961 A CN 101484961A
- Authority
- CN
- China
- Prior art keywords
- contact
- circuit breaker
- movable
- breaker according
- component
- 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.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/33—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
- H02H3/334—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers with means to produce an artificial unbalance for other protection or monitoring reasons or remote control
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Breakers (AREA)
- Emergency Protection Circuit Devices (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
A circuit interrupter comprises a pair of fixed contact strips, a pair of load contact strips, a pair of movable contact strips, a reset component, a movable component, and a trip component that contains a reset contact. Each of the fixed contact strips has a fixed contact. Each of the load contact strips has a load contact. Each of the movable contact strips has a fixed end and a movable end. The movable end of each movable contact strip is split into an inner sub-strip and an outer sub-strip. Each movable end has a first movable contact disposed on the inner sub-strip arranged for contacting one of the corresponding load contacts and a second movable contact disposed on the outer sub-strip arranged for contacting one of the corresponding fixed contacts. The movable component, disposed to sustain the movable ends of the movable contact strips, allow the inner sub-strips and the outer sub-strips to rest on different horizontal planes. The movable component is capable of either being latched with or released from the reset component to move between a first position where the first movable contacts are separated from the load contacts, and the second movable contacts are separated from the fixed contacts, and the movable contact strips are not electrically coupled to the reset contact, a second position where the first movable contacts are separated from the load contacts, and the second movable contacts are separated from the fixed contacts, and at least one of the movable contact strips is electrically coupled to the reset contact, and a third position where the first movable contacts make contact with the corresponding load contacts, and the second movable contacts make contact with the corresponding fixed contacts, and the movable contact strips are not electrically coupled to the reset contact. The trip component is capable of latching the reset component with the movable component for the movable component to move to the third position.
Description
The present invention is that the application number of on September 21st, 2004 application is that the application number of application on March 3rd, 10/945,672 and 2005 is that the application number of application on June 9th, 11/072,855 and 2006 is the part continuity of 11/449,991 patent application.
Technical field
The present invention relates to be used to protect ground-fault interrupter (GFCI) equipment of AC load circuit, more specifically, relate to GFCI with reverse wiring and end-of-life protection.
Background technology
Along with being extensive use of of household electrical appliance, people require to be installed in socket in their family and can work as and unexpectedly contact or protect them not to be subjected to serious injury when other ground fault condition take place.In a single day therefore, designed ground-fault interrupter so that detect just disconnection electrical connection when exchanging (AC) load place generation ground fault condition.
The many electric wiring unit that comprises socket has the line scan pickup coil side that can be connected to power supply, the load end that can be connected to one or more loads and at least one conductive path between line scan pickup coil side and load end.When the people unexpectedly contacts the described line scan pickup coil side of AC load and earth terminal simultaneously, because human body is formed for another conductive path that electric current flows through, so can produce serious injury.Therefore, wish that very electric wiring unit can make the various load deenergizations such as household electrical appliance and consumer electronic products.
GFCI equipment can the detection of ground faults situation and is detected imbalance between the electric current that flows through in the phase place (being also referred to as " fire ") of power supply and the neutral conductive path and deenergization by using sensor transformer.When electric current another route turning by human body for example ground fault condition takes place during to ground, thereby produce uneven ground fault condition between the electric current that causes in phase place and neutral conductor, flowing through.In case detect ground fault condition, the circuit breaker in GFCI equipment trips immediately and is electrically connected to disconnect, and removes the power supply that all are fed to load.
Some circuit breakers, GFCI socket for example, except line scan pickup coil side and load end joint, also having the user can be near load.The user can pass through plug insertion socket, and other household electrical appliance are connected to power supply.Yet because line scan pickup coil side is similar with the load end terminal, load wire is connected to the situation of line scan pickup coil side joint so can produce that line conductor is connected to the load end joint.Here it is so-called reverse wiring.When reverse wiring took place, GFCI equipment can not provide earth fault protection near load to the user usually.If when there is reverse wiring in GFCI equipment, do not provide warning, will have problems to setter.Therefore, a kind of GFCI equipment of desired design can make reset function lose efficacy when there is reverse wiring in GFCI equipment.In addition, expect that very GFCI can always can be near electric not protect the user to the user better when having reverse wiring.
In addition,, expect that also GFCI equipment has simpler design and element still less owing to high stability demand to the GFCI equipment quality, thus easier assembling, installation and wiring correctly.
Summary of the invention
An execution mode of circuit breaker of the present invention comprises a pair of fixed contact piece, a pair of load contact chip, a pair of removable contact chip, reposition element, displaceable element and comprises the trip component of reset contact.Each fixed contact piece has fixed contact.Each load contact chip has load contact.Each removable contact chip has stiff end and movable terminal.Sub-sheet and my husband's sheet in the movable terminal of each removable contact chip is divided into.Each movable terminal has the first removable contact that is used to contact a corresponding load contact in being arranged on the sub-sheet, be arranged on my husband's sheet on be used to contact the second removable contact of a corresponding fixed contact.
Sub-sheet rested on the different horizontal planes with my husband's sheet in the displaceable element that is set to support the movable terminal of removable contact chip allowed.Displaceable element can and reposition element locking or discharge between primary importance, the second place and the 3rd position, to move from reposition element, in this primary importance, the first removable contact separates from load contact, and the second removable contact separates from fixed contact, and removable contact chip is not electrically coupled to reset contact; In this second place, the first removable contact separates from load contact, and the second removable contact separates from fixed contact, and at least one removable contact chip is electrically coupled to reset contact; In the 3rd position, the first removable contact contact with corresponding load contact, and the second removable contact contacts with fixed contact accordingly, and removable contact chip is not electrically coupled on the reset contact.
Trip component can lock reposition element by displaceable element, in case when being used for detecting reset request displaceable element moved to the 3rd position, and can discharge reposition element, in case displaceable element is moved to primary importance when being used for detecting failure condition from displaceable element.
Description of drawings
Specifying of reference implementation mode in conjunction with the accompanying drawings can obtain the more complete understanding to the present invention.These accompanying drawings have only been described exemplary embodiment of the present invention, therefore do not limit its scope.They are used to increase feature and details, wherein:
Fig. 1 is the perspective view of the illustrative embodiments of circuit breaker.
Fig. 2 is that the circuit breaker among Fig. 1 is removed panel part and the perspective view of internal structure is shown.
Fig. 3 is that the circuit breaker among Fig. 2 remove to be installed clamping plate, intermediate and the perspective view of internal structure is shown.
Fig. 4 shows circuit breaker among Fig. 1 at the sectional view of reset mode lower edge AA line.
Fig. 5 shows circuit breaker among Fig. 1 at the sectional view of tripped condition lower edge AA line.
Fig. 6 A shows circuit breaker among Fig. 1 at the sectional view of tripped condition lower edge BB line.
Fig. 6 B shows the circuit breaker of different execution modes of the support portion with movable-component among Fig. 1 at the sectional view of tripped condition lower edge BB line.
Fig. 7 shows circuit breaker among Fig. 1 at the sectional view of the instantaneous state lower edge BB line that reset button is pressed.
Fig. 8 shows circuit breaker among Fig. 1 at the rightabout sectional view of reset mode lower edge BB line.
Fig. 9 shows circuit breaker among Fig. 1 at the sectional view of reset mode lower edge BB line.
Figure 10 shows the circuit breaker with testing element among Fig. 1 along the sectional view of CC line.
Figure 11 shows circuit breaker among Fig. 1 at the sectional view of the instantaneous state lower edge CC line that reset button is pressed.
Figure 12 is the perspective view that the circuit breaker among Fig. 3 is removed the back board.
Figure 13 is the end view from left to right of the circuit breaker among Figure 12.
Figure 14 is the exploded view of the circuit breaker among Figure 12.
Figure 15 is the exploded view of the circuit breaker among Fig. 1.
Figure 16 is the schematic diagram of the control circuit of the circuit breaker among Fig. 1.
Embodiment
As shown in Figure 1, the illustrative embodiments 100 of circuit breaker has housing, and this housing comprises panel part 120, intermediate 190 (shown in Figure 2) and back board 150.Panel part 120 has the standard that is used to receive convex plug or the inlet 122,124 and the ground pin of polarization pin receives opening 160 to hold three pin plug.Circuit breaker 100 comprises installs clamping plate 110, is used for socket is fixed to terminal box.As shown in Figure 2, clamping plate 110 are installed and are had threaded openings is used to be connected to outside ground wire with reception earthing screw 250.
Shown in Fig. 1 and 15, electric current is connected to circuit breaker 100 by terminal screw 170,172,174 and 176, wherein, terminal screw 170 is circuit phase joints, terminal screw 174 is the neutral joints of circuit, and terminal screw 172 is load phase joints, and terminal screw 176 is load neutral joints.Except terminal screw, it should be appreciated by those skilled in the art that the binding post that can also comprise other types, for example set screw, pressure clamp, pressure plare, be pressed into type joint, lead-out wire and brace fast.
Shown in Fig. 2,3 and 6, the conductive path between property joint 174 and the load neutral joint 176 comprises that the one end is electrically coupled to the neutral joint 174 of circuit and the other end and can moves to set up or to disconnect the removable contact chip 340 in right side that is electrically connected, the removable contact 400 in first right side in the right side that is installed in the removable contact chip 340 in right side on the sub-sheet 342, be electrically coupled to the right side load contact chip 360 of load neutral joint 176 and be installed in right side load contact 270 on the right side load contact chip 360 in the line.The user can comprise the joint terminal that can mesh with the pin of insertion convex plug wherein near the load neutral joint.Property joint 174 and user can comprise that the one end is electrically coupled to the neutral joint 174 of circuit and the other end and can moves to set up or to disconnect the removable contact chip 340 in right side that is electrically connected, the removable contact 402 in second right side on right side my husband's sheet 344 of being installed in the removable contact chip 340 in right side, be electrically coupled to the right side fixed contact piece 200 of joint terminal and be installed in right side fixed contact 260 on the right side fixed contact piece 200 near the conductive path between the load neutral joint in the line.
Similarly, circuit join 170 and load phase joint 172 between conductive path comprise that the one end is electrically coupled to circuit phase joint 170 and the other end and can moves to set up or to disconnect the removable contact chip 330 in left side that is electrically connected, the removable contact 390 in first left side in the left side that is installed in the removable contact chip 330 in left side on the sub-sheet 332, be electrically coupled to the left side load contact chip 350 of load phase joint 172 and be installed in left side load contact 280 on the left side load contact chip 350.The user can comprise the joint terminal that can mesh with the pin of insertion convex plug wherein near load phase joint.Circuit join 170 and the user can comprise that the one end is electrically coupled to circuit phase joint 170 and the other end and can moves to set up or to disconnect the removable contact chip 330 in left side that is electrically connected, the removable contact 392 in second left side on left side my husband's sheet 334 of being installed in the removable contact chip 330 in left side, be electrically coupled to the left side fixed contact piece 210 of joint terminal and be installed in left side fixed contact 290 on the fixed contact piece 210 of left side near the conductive path between the load phase joint.
Shown in Fig. 1-14, circuit breaker 100 comprises removable contact chip 330,340, fixed contact piece 200,210, load contact chip 350,360, reposition element, testing element, displaceable element and the trip component with reset contact 312.The movable terminal of the removable contact chip 330 in left side is divided into sub-sheet 332 and left side my husband's sheet 334 in the left side from suitable position, it has removable contact 390 in first left side that is positioned on the sub-sheet 332 in left side and the removable contact 392 in second left side that is positioned on left side my husband's sheet 334.The movable terminal of the removable contact chip 340 in right side is divided into sub-sheet 342 and right side my husband's sheet 344 in the right side from suitable position, it has removable contact 400 in first right side that is positioned on the sub-sheet 342 in right side and the removable contact 402 in second right side that is positioned on right side my husband's sheet 344.Those skilled in the art should understand that, as long as four contacts keep excellent contact to (the removable contact 390 in left side load contact 280 corresponding first left sides, the removable contact 392 in left side fixed contact 290 corresponding second left sides, the removable contact 402 of right side load contact removable contact 400 in 270 corresponding first right sides and right side fixed contact 260 corresponding second right sides) under reset mode, the shape of then removable contact chip 330,340, load contact chip 350,360 and fixed contact piece 200,210 and the position of these contact chips can change.
Outstanding contact 550 (shown in Figure 14) is electrically coupled to the removable contact chip 330 in left side, is used for reset operation.When the reset button 130 of reposition element was pressed, reposition element moved down and causes the removable contact chip 330 in left side to be electrically connected to reset contact 312 by outstanding contact 550.Then, trip component is activated to lock reposition element by displaceable element.When reset button 130 was released, reposition element moved up and drives displaceable element and makes progress together.The removable contact chip 330 in left side is not electrically connected to reset contact 312.Displaceable element upwards is pressed to the movable terminal of removable contact chip 330,340 further that the first removable contact 390,400 keeps well contact with corresponding load contact 280,270 and the second removable contact 392,402 and the good position contacting of fixed contact 290,260 maintenances accordingly.Therefore, reset operation is rebuliding electrical connection between line scan pickup coil side and the load end and between line scan pickup coil side and user can be near load ends.When testing button 140 was pressed, testing element activated trip component to discharge reposition element from displaceable element.Displaceable element moves down and causes removable contact 390,392,400,402 to be opened in 270,280 minutes from fixed contact 260,290 and load contact.Therefore, test operation simulates failure condition disconnect to be electrically connected.
Reposition element comprises reset button 130, resetting shaft 180 and back-moving spring 240.One end of resetting shaft 180 is molded into the bottom side of reset button 130, and the other end extends into displaceable element by intermediate 190.Back-moving spring 240 also partly is arranged in the cup-like portion of intermediate 190 around the top of resetting shaft 180.Therefore, an end of back-moving spring 240 supports reset button 130, and the other end is pressed on the upper surface of intermediate 190.In other words, back-moving spring 240 is limited between reset button 130 and the intermediate 190.
The displaceable element that mainly is arranged on below the reposition element comprises movable-component 430 and lockplate 540.Movable-component 430 has support portion, left side 431 and support portion, right side 432 (shown in Figure 14) of extending respectively below the movable terminal of removable contact chip 330,340.Left side support portion 431 and support portion, right side 432 all have when circuit breaker 100 be in reset mode following time allow in sub-sheet 332,342 and my husband's sheet 334,344 rest on Different Plane with in the first removable contact and load contact (390 and 280,400 and 270) shape that all keeps good contact between and between the second removable contact and the fixed contact (392 and 290,402 and 260).Shown in Fig. 6-11, the support portion, left side 431 of movable-component 430 and each of support portion, right side 432 all have upper surface 431-2,432-2 and lower surface 431-1,432-1, thereby interior sub-sheet 332,342 can rest on different horizontal planes with my husband's sheet 334,344.It will be understood by those skilled in the art that other shapes also can obtain identical result.
In an execution mode (shown in Fig. 6 A), support portion 431,432 has the upper surface 431-2,432-2 below interior sub-sheet 332,342, and has the lower surface 431-1,432-1 below my husband's sheet 334,344.Interior sub-sheet 332,342 is supported by the upper surface 431-2,432-2 of support portion respectively.As a result, when movable-component 430 moved up, interior sub-sheet 332,342 upwards is incorporated into made win removable contact 390,400 and the good position contacting of corresponding load contact 280,270 maintenances.As mentioned above, my husband's sheet 334,344 and interior sub-sheet 332,342 all are respectively the parts of removable contact chip 330,340.Therefore, my husband's sheet 334,344 also upwards is incorporated into by moving of movable-component 430 simultaneously and makes the second removable contact 392,402 and corresponding fixed contact 290,260 keep good position contacting.Owing to make, my husband's sheet 334,344 can not be accurately with interior sub-sheet 332,342 on identical horizontal plane.In order between the second removable contact 392,402 and corresponding fixed contact 290,260, to keep good contact, the lower surface 431-1,432-1 of support portion provides flexible resting on the different horizontal planes for my husband's sheet 334,344, and this horizontal plane can be identical with lower surface 431-1,432-1 or thereon.Difference in height between upper surface 431-2,432-2 and the lower surface 431-1,432-1 can be in the scope of 0.01mm to 5mm.In another execution mode (shown in Fig. 6 B), support portion 431,432 has the lower surface 431-1,432-1 below interior sub-sheet 332,342, and has the upper surface 431-2,432-2 below my husband's sheet 334,344.
As shown in figure 14, movable-component 430 has cavity, middle springs 220, pair of locking groove 436, axial region 480 and backspring 470 reverse.Has the bottom that the cavity of opening holds resetting shaft 180 at the top.The top of cavity is wideer, thereby middle springs 220 can partly be inserted and around the bottom of resetting shaft 180.As a result, middle springs 220 is limited between the inwall of the lower surface of intermediate 190 and cavity.It should be appreciated by those skilled in the art that in some cases middle springs 220 needn't realize intended function.Reverse axial region 480 can with the main body single type manufacturing of movable-component 430, and by the identical materials manufacturing.It will be understood by those skilled in the art that the axial region 480 that reverses can be by the manufacturing of turning up the soil of the body portion of identical or different materials and movable-component 430.Separately the axial region of making 480 that reverses can be fixed to the base plate 490 of movable-component 430.The end of axial region 480 of reversing penetrates in the circuit board 440.Backspring 470 is around reversing axial region 480 and being limited between the base plate 490 and circuit board 440 of movable-component 430.This is arranged on lock slots 436 on two sidewalls of movable-component 430, allows lockplate 540 to extend through movable-component 430.
Trip component comprises trip shaft 500, tripping operation spring 510, electromagnetic unit and control circuit.Electromagnetic unit comprises breaking coil 520, is arranged on the barricade 580 and the metal skirt 530 in breaking coil 520 dead aheads.Metal skirt 530 covers the both sides at least of breaking coils 420, and with a side adjacency of back board 150.Trip shaft 500 has first end of U-shaped fastening opening 543 fastenings in the fastening part with lockplate 540 and is arranged on second end in the breaking coil 520.Breaking coil 520 can comprise main breaking coil 522 and auxiliary trip coil 524.When main breaking coil 522 was lost its function owing to control circuit damages, auxiliary trip coil 524 can be activated with mobile lockplate 540, and it then discharges resetting shaft 180 with the open circuit footpath.The part of tripping operation spring 510 is around the narrower part of second end of trip shaft 500.The remainder of tripping operation spring 510 is formed for the space that trip shaft 500 moves.Tripping operation spring 510 is limited between the shrinkage surface of shielded metal 530 and trip shaft 500.Tripping operation spring 510 can be conical or cylindrical.When activating by control circuit, electromagnetic unit pulling trip shaft 500, it then spurs lockplate 540, thus resetting shaft 180 can discharge by lock hole 545 lockings or from lock hole 545.In order to control the displacement of trip shaft 500, movable-component holds pedestal 590 can have the stop part 592 (as shown in figure 12) that extended before or after lockplate 540, with the displacement of control trip shaft 500.Stop part 592 can be arranged on the both sides of trip shaft 500.
In case detect ground fault condition, test request and reset request, control circuit just activates electromagnetic unit.Control circuit has reset resistor 310, reset contact 312, test resistance 320, induction coil 460 and neutral coil 450.Induction coil 460 and neutral coil 450 detection failure situations.Reset contact 312 is set to contact to activate reset operation with outstanding contact 550.In one embodiment, reset contact 312 is parts of reset resistor 310.As shown in figure 13, reset contact 312 is arranged on the top of fixed station 596, and this fixed station is the part that movable-component holds pedestal 590.In another embodiment, reset contact 312 is the conducting strips that are set to reset resistor 310 electric coupling.When reset button 130 is pressed when causing outstanding contact 550 to contact with reset contact 312, the removable contact chip 330 in left side is electrically coupled to reset resistor 310, thereby forms closed circuit and the generation diverted current.Therefore, control circuit activates electromagnetic unit to carry out reset operation.Similarly, when test pieces 230 is pressed with engaged test resistance 320 and forms when closed circuit, control circuit activates electromagnetic unit.
As illustrated in Figures 5 and 6, circuit breaker 100 is stable under tripped condition at first.Displaceable element is in primary importance, and in this position, the movable terminal of removable contact chip 330,340 rests on the support portion 431,432 of movable-component 430, and opens in 350,360 minutes from fixed contact piece 200,210 and load contact chip.The removable contact chip 330 in left side is not electrically coupled to reset contact 312.Movable-component 430 is owing to the balance between back-moving spring 240, middle springs 220 and the backspring 470 is in stable position.
, pushed reset button 130 and be electrically connected by after the wiring correctly at circuit breaker 100 in conductive path, to set up.When pushing reset button 130, resetting shaft 180 moves down with on the surface that is pushed to lockplate 540.Lockplate 540 drives movable-component 430 and moves down.The movable terminal of removable contact chip 330,340 is owing to they self elasticity moves down.The removable contact chip 330 in left side is electrically coupled to reset resistor 310 to form closed circuit and to produce reset request by outstanding contact 550 and reset contact 312.In one embodiment, outstanding contact 550 is electrically coupled to the removable contact chip 330 in left side by brace 300.Outstanding contact 550 inserts rivet 570 by the respective aperture 437 on the support portion, left side 431 of passing fixing hole 552 on the outstanding contact 550 and movable-component 430 and is connected on the support portion, left side 431 of movable-component 430.It will be understood by those skilled in the art that and also can adopt other modes will give prominence to the support portion, left side 431 that contact 550 is connected to movable-component 430.Brace 300 connects the connecting portion 336 of outstanding contact 550 and the removable contact chip 330 in left side.Brace 300 can comprise copper.Can use material such as annealed copper wire or copper sheet.In another embodiment, the removable contact chip 330 in left side comprises outstanding contact 550.Movable-component 430 is in the instantaneous second place, and in this position, the movable terminal of removable contact chip 330,340 was opened from fixed contact piece 200,210 and load contact chip in 350,360 minutes.Simultaneously, the removable contact chip 330 in left side is electrically coupled to reset contact 312 directly or indirectly to activate reset operation.
Closed circuit owing to what caused by electrical connection, control circuit activates electromagnetic unit with pulling trip shaft 500.Then, trip shaft 500 spurs lockplate 540 by the elastic force of the tripping operation spring 510 that overcomes the frictional force between resetting shaft 180 and the lockplate 540 and be pressed.During position under lock hole 545 moves to resetting shaft 180, the head of resetting shaft 180 penetrates lock hole 545.At this moment, owing to the pressure that is applied to lockplate 540 by resetting shaft 180 disappears, the backspring 470 that is pressed recovers and movable-component 430 is moved up.The support portion, left side 431 of movable-component 430 upwards promotes the removable contact chip 330 in left side.As a result, outstanding contact 550 from reset contact 312 separately.Because this separately causes forming open circuit, control circuit does not activate electromagnetic unit and interrupts pulling force.Then, the tripping operation spring 510 that is pressed recovers to promote lockplate 540 and to cause the neck of resetting shaft 180 to be locked by lock hole 545.
When discharging reset button, the back-moving spring 240 that is pressed recovers with the resetting shaft 180 that moves up.Resetting shaft 180 is by upwards driving movable-component 430 by the lockplate 540 of resetting shaft 180 lockings.By overcoming the middle springs 220 that is pressed and the elastic force of removable contact chip 330,340, the movable-component 430 with support portion 431,432 shift the movable terminal of removable contact chip 330,340 onto the first removable contact 390,400 keep well contact with corresponding load contact 280,270 and the second removable contact 392,402 and the good position contacting of fixed contact 290,260 maintenances accordingly on.Then, when circuit breaker 100 was in reset mode, movable-component 430 was in the 3rd position.
In addition, it should be appreciated by those skilled in the art that such as other such elastomeric materials of elastic tube and also can be used to replace back-moving spring 240, middle springs 220, backspring 470 and tripping operation spring 510.In the present embodiment, load contact 280,270 and fixed contact 290,260 have smooth contact surface, and first removable contact 390, the 400 and second removable contact 392,402 has for example hemispheric projection contact surface.In the present embodiment, all contacts comprise copper alloy, and the contact surface of all contacts is coated with by silver alloy.It should be appreciated by those skilled in the art that load contact 280,270, fixed contact 290,260, first removable contact 390, the 400 and second removable contact 392,402 can be by other material and with other shape manufacturing.In the present embodiment, when activating by control circuit, electromagnetic unit pulling trip shaft 500, thus resetting shaft 180 can be by lock hole 545 lockings or from its release.Yet, it should be appreciated by those skilled in the art that when being activated electromagnetic unit also can promote trip shaft 500 to obtain identical result by control circuit.
If there is reverse wiring in circuit breaker 100, then when outstanding contact 550 contacted reset contact 312, control circuit can not be powered with the activation electromagnetic unit, thereby reset function is under an embargo.When circuit breaker 100 was in tripped condition, control circuit only was connected to circuit (input) end of circuit breaker 100, and is free of attachment to load (output) end.As a result, if line conductor is connected to load (output) end of circuit breaker 100, then do not have power supply to be provided to control circuit, and reset function is under an embargo.Particularly, because lockplate 540 do not move allowing resetting shaft 180 to penetrate lock hole 545, resetting shaft 180 be can't help lockplate 540 lockings.Therefore, when reset button 130 was released, owing to the elastic force from the back-moving spring 240 that is pressed, resetting shaft 180 moved up separately and does not upwards drive movable-component 430.Can't help resetting shaft 180 when pushing when lockplate 540, and the backspring 470 that is pressed recovers with the movable-component 430 that moves up.When the elastic force of backspring 470, middle springs 220 and removable contact chip 330,340 reaches balance, on the primary importance that the movable terminal that movable-component 430 is got back to removable contact chip 330,340 was opened from fixed contact piece 200,210 and load contact chip in 350,360 minutes.Circuit breaker 100 remains on tripped condition.The failure that resets of circuit breaker 100 provides the warning of reverse wiring.When setter can not reset circuit breaker 100, he recognized that wiring is wrong and can correct wiring immediately.
In addition, for better protection is provided, mean that line conductor is connected to the reverse wiring of load (output) end if exist, then circuit breaker 100 can not be used as socket at all, and does not have power supply to offer the electronic installation of any insertion.This has prevented that people from using the socket that does not have the earth fault current open circuit protection.In addition, setter or user can easily find reverse wiring and correct it.Otherwise people can not use circuit breaker 100.As mentioned above, because control circuit is not powered to carry out reset operation, even after reset button 130 is pressed, circuit breaker 100 also remains on tripped condition.Because load contact chip 350,360 was opened from removable contact chip in 330,340 minutes, load end joint 172,176 and user can not have conductive path between the joint terminal near load connector 122,124.
Whether installation testing mechanism can disconnect by the analogue ground failure condition with the test electrical connection.Testing element comprises testing button 140 and test pieces 230.One end of test pieces 230 is electrically coupled to left side fixed contact piece 210, and the other end is suspended in testing button 140 belows.When setting up electrical connection and pushing testing button 140, testing button 140 downward push to test sheets 230 are with the test resistance 320 of touch controls circuit.As a result, control circuit activates electromagnetic unit with pulling trip shaft 500.By overcoming the elastic force of tripping operation spring 510, trip shaft 500 pulling lockplates 540 are to discharge resetting shaft 180 from lock hole 545.After resetting shaft 180 discharges, because the middle springs 220 that is pressed and the elastic force of removable contact chip 330,340, movable-component 430 and lockplate 540 move down.The movable terminal of removable contact chip 330,340 moves down and opened in 350,360 minutes from fixed contact piece 200,210 and load contact chip.When the elastic force balance that makes progress of downward elastic force and the backspring 470 that is pressed, on the primary importance that the movable terminal that movable-component 430 is stabilized in removable contact chip 330,340 was opened from fixed contact piece 200,210 and load contact chip in 350,360 minutes.Outstanding contact 550 separates from reset contact 312, thereby the removable contact chip 330 in left side is not electrically coupled to reset contact 310.As a result, be electrically connected and be disconnected and circuit breaker 100 is in tripped condition.
When control circuit detects ground fault condition, activate electromagnetic unit with pulling trip shaft 500.Remaining process is identical with test operation.
Figure 16 illustrates the relation of other elements of the illustrative embodiments of control circuit and it and circuit breaker 100.Input L is a circuit phase joint, and the neutral joint of input N circuit.Output L is a load phase joint, and output N load neutral joint.Output L1 is a user load phase joint, and the neutral joint of output N1 user load.The phase of input (circuit) end and neutral conductive path are through sensor transformer 460 (T1) and neutral transformer 450 (T2), and they are used to detect mutually and the imbalance of the electric current between the neutral conductive path.
When not having ground fault condition, the electric current that flows through phase and neutral conductive path is equal and opposite.In the iron core of sensor transformer 460 (T1), do not produce net flux.Under owing to the situation that electric current is turned to, flow through mutually and the electric current of neutral conductor is unequal and the generation net flux.When magnetic flux reached the threshold value of being determined by resistance R 4, the terminal 5 of IC produced signal to activate main breaking coil 522 (T3).The result, trip shaft 500 pulling lockplates 540, thereby resetting shaft 180 discharges from lockplate 540, and between the first removable contact 390,400 and the load contact 280,270 and the electrical connection between the second removable contact 392,402 and fixed contact 290,260 all interrupt.
When circuit breaker 100 is in tripped condition and reset button 130 (S2) when being pressed, diverted current flow to by reset resistor 310 (R6), reset contact 312, outstanding contact 550, the removable contact chip 330 of brace 300 and left side from input N and imports L.The electric current that flows through phase and neutral conductive path produces imbalance, thereby the terminal of IC 5 sends signals to activate the main breaking coil 522 (T3) of electromagnetic unit.As mentioned above, because trip shaft 500 pulling lockplates 540 are to lock resetting shafts 180 by lock hole 545, movable-component 430 is moved upwards up to the 3rd position, in this position, the first removable contact 390,400 keeps well contacting with corresponding load contact 280,270, and the second removable contact 392,402 keeps well contacting with corresponding fixed contact 290,260.Be electrically connected thereby set up.
When circuit breaker 100 is in reset mode and testing button 140 (S1) when being pressed, diverted current flow to by reset resistor 320 (R2), test pieces 230 and left side fixed contact piece 210 from input N and exports L1.The electric current that flows through phase and neutral conductive path produces imbalance, thereby the terminal of IC 5 sends signals to activate the main breaking coil 522 (T3) of electromagnetic unit.As mentioned above, because trip shaft 500 pulling lockplates 540 are to discharge resetting shaft 180 from lock hole 545, movable-component 430 is moved down into primary importance, in this position, the first removable contact 390,400 was opened and the second removable contact 392,402 was opened from fixed contact in 290,260 minutes from corresponding load contact in 280,270 minutes.Be electrically connected thereby disconnect.
Control circuit also has the function of end-of-life protection.In order to protect the user, circuit breaker 100 can indicate circuit breaker to reach the termination in useful life by visual means.In addition, when circuit breaker 100 reached the termination in useful life, circuit breaker 100 can trip to disconnect conductive path.Is that 11/449,991 patent application full content is incorporated into this by Wang Ping in the application number of on June 9th, 2006 application.
When making main breaking coil 522 (T3) not move with the disconnection conductive path when being out of order owing to some relevant electric devices, auxiliary trip coil 524 (T4) can be activated with mobile trip shaft 500, and it then spurs lockplate 540.In other words, when some electric devices relevant with main breaking coil 522 (T3) were out of order, the end-of-life sensor circuit transmitted a signal to end life indicating circuit, and it then transmits a signal to auxiliary trip coil circuit to activate auxiliary trip coil 524 (T4).As a result, resetting shaft 180 discharges from lockplate 540, and between the first removable contact 390,400 and the load contact 280,270 and the electrical connection between the second removable contact 392,402 and the fixed contact 290,260 all be interrupted.Circuit breaker 100 reaches the termination in its useful life, and can not be reset again.
The end-of-life sensor circuit comprises LED 2, photo resistance MG, diode D6, capacitor C 8 and resistance R 8.The photocontrol that the resistance value of photo resistance MG is sent by LED 2.In one embodiment, capacitor C 8 has the capacitance of about 0.001-10 μ F.Resistance R 8 has the resistance value of about 10-60kOhms.
In the end-of-life sensor circuit, the anode of LED 2 is connected to the negative electrode of diode D6 and first end of capacitor C 8.Second end of capacitor C 8 is connected to first end of resistance R 8.Second end of resistance R 8 is connected to resistance R 5 and capacitor C 4.The negative electrode of LED 2 is connected to anode and the node A of diode D6.First end of photo resistance MG is connected to resistance R 5.Second end of photo resistance MG is connected to end life indicating circuit.
End life indicating circuit comprises LED 3, transistor Q1, resistance R 12, resistance R 11, resistance R 10 and the silicon controlled rectifier SCR2 as visual detector.In one embodiment, resistance R 12 has the resistance value of about 1-20kOhms; Resistance R 11 has the resistance value of about 10-60kOhms; And resistance R 10 has the resistance value of about 50-600kOhms.Silicon controlled rectifier SCR2 has the trigger current of about 10-200 μ A.Transistor Q1 is a NPN transistor.
In end life indicating circuit, first end of resistance R 12 and resistance R 11 is connected to the line scan pickup coil side of power supply input L by resistance R 10.Second end of resistance R 12 is connected to the collector electrode of NPN transistor Q1.Second end of resistance R 11 is connected to the base stage of NPN transistor Q1 and the anode of the second silicon controlled rectifier SCR2.The emitter of NPN transistor Q1 is connected to the anode of the light-emitting diode among the optical coupler U1 of auxiliary trip coil circuit.The negative electrode of the light-emitting diode among the optical coupler U1 is connected to the anode of LED 3.The negative electrode of LED 3 is connected to the negative electrode of silicon controlled rectifier SCR2.Silicon controlled rectifier SCR2 grid is connected to photo resistance MG, and is connected to input N by resistance R 15.
Auxiliary trip coil circuit comprises bridge rectifier D 8-D11, resistance R 16, capacitor C 9, resistance R 14, the optical coupler U1 with light-emitting diode and phototransistor, silicon controlled rectifier SCR2.Bridge rectifier D 8-D11 is coupled to power supply input L and input N flows to receive alternating current and output DC.The output of bridge rectifier D 8-D11 be connected to the negative pole end of capacitor C 9.Another output of bridge rectifier D 8-D11 is connected to first end of resistance R 16.Second end of resistance R 16 is connected to the positive terminal of capacitor C 9 and first end of resistance R 14.Second end of resistance R 14 is connected to the collector electrode of the phototransistor among the optical coupler U1.The emitter of phototransistor is connected to the grid of silicon controlled rectifier SCR3.The negative electrode of silicon controlled rectifier SCR3 is connected to ground.The anode of silicon controlled rectifier is connected to an end of auxiliary trip coil 524.Second end of auxiliary trip coil 524 is connected to output L1.
When circuit breaker 100 suitably moved, LED 2 was unlocked and LED 3 is turned off.LED 2 is boosted with luminous and diffuse on the photo resistance MG to reduce its resistance value.When the resistance value of photo resistance MG was hanged down, the direct current of bridge rectifier D 1-D4 was provided on the grid of silicon controlled rectifier SCR2 by photo resistance MG.As a result, silicon controlled rectifier SCR2 is unlocked.The electric current that flows through resistance R 11 and silicon controlled rectifier SCR2 can not pass through LED 3.Therefore, LED 3 is turned off.
When circuit breaker 100 reached end of life, LED 3 was unlocked and/or circuit breaker 100 tripping operations can not protect the people to avoid electric shock with warning user circuit breaker 100 again.If some electric devices damage, circuit breaker 100 reaches end of life, disconnects conductive path thereby make circuit breaker 100 can not suitably move after detecting predetermined case by activating main breaking coil 522.These elements can comprise silicon controlled rectifier SCR1, bridge rectifier D 1-D4, resistance R 5, capacitor C 4 and control chip.
When owing to some relevant electric devices damages main breaking coil 522 can not be worked, auxiliary trip coil 524 is activated to disconnect conductive path.The electric device that damages causes fuse F1 to blow.As a result, LED 2 is turned off, and does not have electric current to be provided to the grid of the second silicon controlled rectifier SCR2 by photo resistance MG.Silicon controlled rectifier SCR2 is turned off and NPN transistor Q1 is unlocked.Electric current flow to virtual ground by light-emitting diode among the optical coupler U1 and LED 3.Then, LED 3 is unlocked and has reached the termination in its useful life with indication circuit breaker 100, and needs to replace.Simultaneously, the light-emitting diode among the optical coupler U1 also is unlocked electric current is provided to the grid of silicon controlled rectifier SCR3 from phototransistor.Then, silicon controlled rectifier SCR3 is unlocked to activate auxiliary trip coil 524 (T4).As a result, trip shaft 500 pulling lockplates 540 are to discharge resetting shaft 180 from lock hole 545.Movable-component 430 is moved down into primary importance, and in this position, the first removable contact 390,400 was opened from corresponding load contact in 280,270 minutes, and the second removable contact 392,402 was opened from fixed contact in 290,260 minutes.Be electrically connected thereby disconnect.Circuit breaker 100 is in tripped condition and can not be reset again.Auxiliary trip coil 524 (T4) makes circuit breaker 100 become safe equipment.
Though adopted illustrative embodiments to describe the present invention, be not restricted to this.It is exemplary rather than restrictive that described execution mode is regarded as merely in all fields.The present invention can implement with other concrete forms, and does not break away from its intrinsic propesties.Therefore, scope of the present invention is indicated by claims, rather than is indicated by above-mentioned description.In the implication of the equivalence of claim and scope, carry out change and be included in the scope of claim.
Claims (43)
1, a kind of circuit breaker comprises:
A pair of fixed contact piece, each fixed contact piece has fixed contact;
A pair of load contact chip, each load contact chip has load contact;
A pair of removable contact chip, each removable contact chip has stiff end and movable terminal, sub-sheet and my husband's sheet in the movable terminal of each removable contact chip is divided into, each movable terminal has the first removable contact that is used to contact a corresponding load contact in being arranged on the sub-sheet, be arranged on my husband's sheet on be used to contact the second removable contact of a corresponding fixed contact;
Reposition element;
The trip component that comprises reset contact; With
Displaceable element, be set to support the movable terminal of removable contact chip, this displaceable element can and reposition element locking or discharge between primary importance, the second place and the 3rd position, to move from reposition element, in this primary importance, the first removable contact separates from load contact, and the second removable contact separates from fixed contact, and removable contact chip is not electrically coupled to reset contact; In this second place, the first removable contact separates from load contact, and the second removable contact separates from fixed contact, and at least one removable contact chip is electrically coupled to reset contact; In the 3rd position, the first removable contact contact with corresponding load contact, and the second removable contact contacts with fixed contact accordingly, and removable contact chip is not electrically coupled to reset contact;
Wherein, trip component can lock reposition element by displaceable element, in case when being used for detecting reset request displaceable element moved to the 3rd position, and trip component can discharge reposition element from displaceable element, in case displaceable element is moved to primary importance when being used for detecting failure condition;
Wherein, sub-sheet rested on the different horizontal planes with my husband's sheet in displaceable element can allow.
2, circuit breaker according to claim 1, wherein:
Load contact and fixed contact have smooth contact surface; And
The first removable contact and the second removable contact have the projection contact surface.
3, circuit breaker according to claim 2, wherein:
Described contact surface comprises silver.
4, circuit breaker according to claim 1 also comprises:
Resisting force sheet, its set-up mode is for producing instantaneous blocking effect when displaceable element when primary importance moves to the second place.
5, circuit breaker according to claim 1, wherein:
Described reposition element comprises reset button, be connected to the resetting shaft of reset button and around the back-moving spring on the top of resetting shaft.
6, circuit breaker according to claim 5, wherein:
Described displaceable element comprise movable-component and can and the resetting shaft locking and the lockplate that can keep movable-component between diverse location, to move.
7, circuit breaker according to claim 6, wherein:
Described movable-component is included in support portion, the cavity that holds the bottom of resetting shaft that the movable terminal of removable contact chip extends below, at least one lock slots that is used to insert lockplate, reverse shaft and around the backspring of reverse shaft.
8, circuit breaker according to claim 7, wherein:
Described movable-component also comprises the middle springs that is arranged in the described cavity and centers on the bottom of described resetting shaft.
9, circuit breaker according to claim 7, wherein:
Described support portion comprises the hierarchy with upper surface and lower surface, thereby interior sub-sheet can rest on the different horizontal planes with my husband's sheet.
10, circuit breaker according to claim 9, wherein:
Sub-sheet is supported by the upper surface of described support portion in described.
11, circuit breaker according to claim 10, wherein:
When the second removable contact contacted corresponding fixed contact, described my husband's sheet rested on the lower surface of support portion.
12, circuit breaker according to claim 9, wherein:
Described my husband's sheet is supported by the upper surface of support portion.
13, circuit breaker according to claim 12, wherein:
When the second removable contact contacted corresponding fixed contact, described interior sub-sheet rested on the lower surface of support portion.
14, circuit breaker according to claim 6, wherein:
Described trip component comprises can be with the trip shaft of described lockplate fastening, around the tripping operation spring of described trip shaft, can move the electromagnetic unit of described trip shaft and in case activate the control circuit of electromagnetic unit when detecting predetermined case.
15, circuit breaker according to claim 14, wherein:
Described control circuit has end-to-life protection function.
16, circuit breaker according to claim 14, wherein:
Described control circuit can disconnect conductive path when described circuit breaker reaches its end-of-life.
17, circuit breaker according to claim 14, wherein:
Described control circuit can indicate circuit breaker to reach its end-of-life by visual device.
18, circuit breaker according to claim 14, wherein:
Described electromagnetic unit comprises breaking coil, and breaking coil comprises main breaking coil and auxiliary trip coil.
19, circuit breaker according to claim 18, wherein said control circuit can activate auxiliary trip coil to disconnect conductive path when main breaking coil is not worked.
20, a kind of circuit breaker comprises:
A pair of fixed contact piece, each fixed contact piece has fixed contact;
A pair of load contact chip, each load contact chip has load contact;
A pair of removable contact chip, each removable contact chip has stiff end and movable terminal, the second removable contact that is used to contact a corresponding fixed contact on sub-sheet and my husband's sheet in the movable terminal of each removable contact chip is divided into, each movable terminal have the first removable contact that is used to contact a corresponding load contact in being arranged on the sub-sheet and be arranged on my husband's sheet;
Reposition element comprises reset button, is connected to the resetting shaft of reset button and around first elastic tube on the top of resetting shaft;
Displaceable element, described displaceable element comprises movable-component and lockplate, sub-sheet rested on the different horizontal planes with my husband's sheet in described movable-component can allow, described lockplate can and resetting shaft locking and keep described movable-component between diverse location, to move;
Trip component, described trip component comprise can be with trip shaft, second elastic tube of lockplate fastening, can move the electromagnetic unit of described trip shaft and in case activate the control circuit of electromagnetic unit when detecting predetermined case.
21, circuit breaker according to claim 20, wherein:
Described movable-component is included in support portion, the cavity that holds the bottom of described resetting shaft, at least one lock slots that is used to insert described lockplate that the movable terminal of removable contact chip extends below, axial region and around the 3rd elastic tube of the described axial region that reverses reverses.
22, circuit breaker according to claim 21, wherein:
Described movable-component also comprises the 4th elastic tube that is arranged in the described cavity and centers on described resetting shaft bottom.
23, circuit breaker according to claim 21, wherein:
Described support portion comprises the hierarchy with upper surface and lower surface, thereby sub-sheet can rest on the different horizontal planes with described my husband's sheet in described.
24, circuit breaker according to claim 23, wherein:
Sub-sheet is supported by the upper surface of described support portion in described.
25, circuit breaker according to claim 24, wherein:
When the second removable contact contacted corresponding fixed contact, described my husband's sheet rested on the lower surface of described support portion.
26, circuit breaker according to claim 23, wherein:
Described my husband's sheet is supported by the upper surface of described support portion.
27, circuit breaker according to claim 26, wherein:
When the second removable contact contacted corresponding fixed contact, described interior sub-sheet rested on the lower surface of described support portion.
28, circuit breaker according to claim 21, wherein:
Described lockplate comprises sticking department and fastening part, and sticking department extends into movable-component by lock slots and has and is used for the lock hole that resetting shaft penetrates, and the described fastening part in the movable-component outside has the opening that is used for fastening.
29, circuit breaker according to claim 28, wherein:
The fastening part of described lockplate has the opening of U-shaped, and when described trip shaft kept opening fastening with lockplate, described opening can move up and down between different positions.
30, circuit breaker according to claim 20, wherein:
Described control circuit has end-to-life protection function.
31, circuit breaker according to claim 20, wherein:
Described control circuit can disconnect conductive path when circuit breaker reaches its end-of-life.
32, circuit breaker according to claim 20, wherein:
Described control circuit can indicate circuit breaker to reach its end-of-life by visual device.
33, circuit breaker according to claim 20, wherein:
Described electromagnetic unit comprises breaking coil, and described breaking coil comprises main breaking coil and auxiliary trip coil.
34, circuit breaker according to claim 33, wherein:
Described control circuit can activate auxiliary trip coil to disconnect conductive path when main breaking coil is not worked.
35, circuit breaker according to claim 20, wherein:
Described electromagnetic unit also comprises breaking coil, barricade and metal skirt;
Described trip shaft partly is arranged in the described breaking coil; And
Described electromagnetic unit moves described trip shaft and compresses described second elastic tube when being activated, thereby described resetting shaft can discharge with described lockplate locking or from described lockplate.
36, circuit breaker according to claim 20 also comprises:
Movable-component holds pedestal, extends the stop part that holds pedestal with the described movable-component of the displacement of controlling described trip shaft before or after described lockplate.
37, circuit breaker according to claim 22, wherein:
Described first elastic tube is a back-moving spring, and described second elastic tube is the tripping operation spring, and described the 3rd elastic tube is a backspring, and described the 4th elastic tube is a middle springs.
38, according to the described circuit breaker of claim 37, wherein said back-moving spring has the elastic force bigger than described middle springs.
39, circuit breaker according to claim 22 also comprises:
Be arranged on the intermediate between described reposition element and the described displaceable element, this intermediate structure comprises that described resetting shaft passes its opening;
Be arranged on the circuit board below the described reverse shaft portion, this circuit board comprises that the described axial region that reverses can pass its opening.
40, according to the described circuit breaker of claim 39, wherein:
Described back-moving spring is limited between the upper surface of described reset button and described intermediate, described middle springs is limited between the inwall of cavity of the lower surface of described intermediate and described movable-component, and described backspring is limited between the upper surface of the lower surface of base plate of described movable-component and described circuit board; Described tripping operation spring is limited between the shrinkage surface and described metal skirt of described trip shaft.
41, circuit breaker according to claim 20 also comprises:
Testing element, described testing element comprises testing button and test pieces, described test pieces has an end that is suspended under the described testing button and is electrically connected to the other end of described fixed contact piece.
42, circuit breaker according to claim 20 also comprises:
The reverse wiring testing circuit comprises and detecting and with the signal generator spare of signal indication reverse wiring.
43, according to the described circuit breaker of claim 42, wherein:
Described signal generator spare comprises at least one light-emitting diode.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNPCT/CN2006/001266 | 2006-06-09 | ||
| PCT/CN2006/001266 WO2007143879A1 (en) | 2006-06-09 | 2006-06-09 | Ground fault circuit interrupter with end-of-life protection |
| US11/449,991 | 2006-06-09 | ||
| PCT/CN2006/002592 WO2007143891A1 (en) | 2006-06-09 | 2006-09-30 | Ground fault circuit interrupter with reverse wiring and end-of-life protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101484961A true CN101484961A (en) | 2009-07-15 |
Family
ID=38831386
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006800548772A Pending CN101473505A (en) | 2006-06-09 | 2006-06-09 | Earthing fault breaker with end-to-life protection function |
| CNA2006800548787A Pending CN101484961A (en) | 2006-06-09 | 2006-09-30 | Ground fault circuit interrupter with reverse wiring and end-of-life protection |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006800548772A Pending CN101473505A (en) | 2006-06-09 | 2006-06-09 | Earthing fault breaker with end-to-life protection function |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN101473505A (en) |
| WO (1) | WO2007143879A1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997024790A1 (en) * | 1995-12-29 | 1997-07-10 | Tower Manufacturing Corporation | Ground fault circuit interrupter |
| US6697238B2 (en) * | 2001-02-02 | 2004-02-24 | Hubbell Incorporated | Ground fault circuit interrupter (GFCI) with a secondary test switch contact protection |
| US7003435B2 (en) * | 2002-10-03 | 2006-02-21 | Leviton Manufacturing Co., Inc. | Arc fault detector with circuit interrupter |
-
2006
- 2006-06-09 CN CNA2006800548772A patent/CN101473505A/en active Pending
- 2006-06-09 WO PCT/CN2006/001266 patent/WO2007143879A1/en active Application Filing
- 2006-09-30 CN CNA2006800548787A patent/CN101484961A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2007143879A1 (en) | 2007-12-21 |
| CN101473505A (en) | 2009-07-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100433224C (en) | Grounded failure circuit breaker with reverse wiring protection function | |
| US7195500B2 (en) | Ground fault circuit interrupter with end of life indicators | |
| US7154718B1 (en) | Protection device with power to receptacle cut-off | |
| US7525402B2 (en) | Circuit interruption device with indicator having function of auto-monitoring and multi-protecting circuit | |
| US7551047B2 (en) | Tamper resistant ground fault circuit interrupter receptacle having dual function shutters | |
| US8089738B2 (en) | GFCI that cannot be reset until wired correctly on line side and power is applied | |
| US7317600B2 (en) | Circuit interrupting device with automatic end of life test | |
| US7538993B2 (en) | Receptacle circuit interrupting devices providing an end of life test controlled by test button | |
| US8300368B2 (en) | Circuit interrupting device with end-of life testing, reverse wiring and high voltage surge capability | |
| US7295415B2 (en) | Circuits for circuit interrupting devices having automatic end of life testing function | |
| US7265956B2 (en) | Ground fault circuit interrupter containing a dual-function test button | |
| US8164403B2 (en) | Disconnect mechanism in a power receptacle with ground-fault circuit interruption functions | |
| US7307821B2 (en) | Ground fault circuit interrupter with reverse wiring and end-of-life protection | |
| US7859368B2 (en) | Circuit interrupting device with automatic components detection function | |
| US6309248B1 (en) | Modular GFCI receptacle | |
| US8736279B2 (en) | Electric leakage detection protective circuit with magnetic lock mechanism | |
| US20090161271A1 (en) | Novel circuit interrupting device with interconnecting reset and test buttons | |
| US20090286411A1 (en) | Tamper resistant interrupter receptacle having a detachable metal skin | |
| US20080094765A1 (en) | Circuit interrupting device with automatic end of life test | |
| CN101246795B (en) | Ground fault line breaker | |
| CN202586188U (en) | Electrical wiring apparatus possessing wiring improper protection and automatic test | |
| US20100290163A1 (en) | Ground-fault circuit interrupter with reverse wiring proteciton function | |
| KR100609439B1 (en) | 2 openings socket outlet having short circuit interrupt function | |
| CN101484961A (en) | Ground fault circuit interrupter with reverse wiring and end-of-life protection | |
| CN202353192U (en) | Wiring protecting device for power distribution system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090715 |