CN201018126Y - Creepage protecting socket with service life expiration detecting function - Google Patents
Creepage protecting socket with service life expiration detecting function Download PDFInfo
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- CN201018126Y CN201018126Y CNU2007201031657U CN200720103165U CN201018126Y CN 201018126 Y CN201018126 Y CN 201018126Y CN U2007201031657 U CNU2007201031657 U CN U2007201031657U CN 200720103165 U CN200720103165 U CN 200720103165U CN 201018126 Y CN201018126 Y CN 201018126Y
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- earth leakage
- leakage protective
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Abstract
The utility model discloses a PRCD capable of automatically testing the end of life and displaying the tested results, which is characterized in that: a pair of electrically connected output metal sheets connected with the power supply output end are added on a socket circuit board and a pair of moving contacts are provided on the metal sheets; two pairs of static contacts are arranged on an output conductor of the power supply, which are respectively corresponding with the moving contacts on the power supply input metal sheets and that on the electrically connected output metal sheets in vertical to form two sets and four switches. Besides, a circuit testing the end of the life is added on the circuit board, which, when switching on the power supply for the socket, can automatically test for the leakage protection function; if discovering that the service life of the socket is ended, the testing circuit will prevent offset buttons to offset to make a loaded end of the socket and a power output hole have no power supply to output and also warn users to timely exchange the PRCD through an offsetting indicating lamp. The utility model has the advantages of complete functions, good safety and can ensure the user's safety and also the electrical apparatus's safety during utilization.
Description
Technical field
The utility model relates to a kind of earth leakage protective socket; especially refer to need not to operate the earth leakage protective socket that any parts just can carry out life-span stop detection to earth leakage protective socket automatically and show testing result after a kind of power line in earth leakage protective socket power input and wall connects; simultaneously; this earth leakage protective socket can also be threaded off by force by mechanical structure, cuts off the power supply output of earth leakage protective socket.
Background technology
Along with the continuous development of earth leakage protective socket (being called for short GFCI) industry, people require more and more higher to the safety in utilization of earth leakage protective socket.Hope when its inner components and parts lost efficacy the forfeiture creepage protection function when its end-of-life, can in time be reminded the user in the use of earth leakage protective socket, change new product.
Yet; common in the market earth leakage protective socket; not only do not have life end checking function; and; when its end-of-life, concerning the user without any prompt facility, its reset button still can reset; the single-phase three-wire power supply output plughole of the load output of earth leakage protective socket and receptacle face still has power supply output, misleads the user and continues to use.When leaky occurring, this earth leakage protective socket does not have any protective effect, very easily causes the get an electric shock generation of dead accident of user.
Summary of the invention
In view of the foregoing, main purpose of the present utility model provides and need not to operate any parts after a kind of power line in earth leakage protective socket power input and wall connects and just can whether still have the earth leakage protective socket that creepage protection function detected and showed testing result to earth leakage protective socket automatically.As the earth leakage protective socket inner member is intact when not having end-of-life homing light Chang Liang, expression can be set up correct reset mechanism reset button automatically and can be resetted, and after resetting, power supply output indicator Chang Liang shows that earth leakage protective socket can operate as normal; When earth leakage protective socket inner member open circuit or short circuit are end-of-life; the utility model by homing light do not work represent this earth leakage protective socket end-of-life and stop reset button to reset; make the single-phase three-wire power supply output plughole of the load output of earth leakage protective socket and receptacle face all not have power supply output, avoided when leaky occurs because of earth leakage protective socket end-of-life but it still has power supply to export the get an electric shock generation of dead accident of the user who causes.
Another purpose of the present utility model provides a kind of earth leakage protective socket with mechanical tripping function.Components and parts in earth leakage protective socket; especially in the time of producing the tripping coil inefficacy of impact; when being current leakage jack life termination; the utility model can make earth leakage protective socket tripping operation/dropout mechanically by force; cut off the output of its power supply by force, and make this earth leakage protective socket of end-of-life can't reset again.
For achieving the above object, the utility model is by the following technical solutions: a kind of earth leakage protective socket with life end checking function, and it comprises housing, be installed in the earth leakage protective socket realized in the housing has/circuit board, elasticity power firestreak, zero line input sheet metal, power firestreak, zero line output conductor, power firestreak, the zero line output of non-transformer output, be used to detect the differential differentiating transformer of leakage current; It is characterized in that:
On described circuit board, be equipped with power supply input sheet metal is connected with power supply output conductor, power output end electric power/or the mechanical trip device of disconnection;
This mechanical trip device comprises release, the electric installation that resets, snap close, latch spring, reset guide post, back-moving spring and tripping coil;
Release be positioned at reset button under, be a cylinder; Its left and right sides stretches out to form and carries arm, and described elasticity power supply input sheet metal is connected the output sheet metal and is positioned at the top that arm is carried in the release left and right sides with a pair of elasticity, and can move up and down along with release;
Be provided with a vertical central perforation at the top of release, the reset guide post that is with back-moving spring that is embedded in the reset button bottom surface can move up and down along central perforation; The bottom of described reset guide post, close its bottom have the locked groove of a circle depression;
At the middle part of release, cross release and be provided with " L " shape snap close of movably making by metal material, be provided with bonnet lock hole at the end face of snap close; Be contained in the interior reset guide post of release central perforation and the bonnet lock hole of snap close end face and be the dislocation shape;
Between the sidewall of release and snap close madial wall, be provided with a latch spring;
Be provided with the electric installation that resets in the bottom of release; This electric installation that resets comprises the reset switch box, two " F " shape conducting strips, conducting bridge and guide spring; Staggered relatively respectively in the both sides of reset switch box have " F " shape conducting strip, wherein, the lower end of " F " shape conducting strip links to each other with power ground by a controllable silicon, and another " F " shape conducting strip lower end links to each other with the live wire of ac power input end by tripping coil; Conducting bridge is arranged on reset switch box inside, and the two ends of conducting bridge are respectively equipped with an electrical contact, downward lead of middle part riveted joint of conducting bridge; Be with guide spring on the lead; Be provided with a perforation in the middle of the bottom of reset switch box, lead passes this perforation and stretches out circuit board; The conducting bridge that electrical contact is riveted at two ends respectively places between two " F " shape conducting strip upper opening places staggered relatively, it from static state to the reset mode under the effect of guide spring, along with release together, along in " F " shape sheet metal open side, upper and lower position moves;
Be provided with a tripping coil that is built-in with movable core in the outside of snap close sidewall, the built-in movable core of tripping coil faces the sidewall of snap close; This snap close laterally moves and reset button is resetted or threads off/trip.
The described electric installation that resets constitutes that link with reset button, as to react a reset button state sensitive switch;
When the reset button of earth leakage protective socket was in trip status, the electrical contact on the conducting bridge in the described electric installation that resets was positioned at two " F " shape conducting strip intermediate groove positions staggered relatively, and promptly sensitive switch is in off-state;
When reset button was pressed, described release was pressed towards down and moves, and the electrical contact on the conducting bridge both sides in the described electric installation that resets contacts conducting with outstanding position, two " F " shape conducting strip bottoms staggered relatively, and sensitive switch is closure state;
When reset button was in reset mode, the electrical contact on the conducting bridge contacted conducting with outstanding position, conducting strip top, and promptly sensitive switch is in closure state.
Described mechanical trip device also includes a dropout slide block;
This dropout slide block be positioned at the earth leakage protective socket testing button under, its end face is provided with an inclined downward, the pointed top of the arm that is with spring that testing button extends downwards is located in this top, inclined-plane; The bottom surface of dropout slide block is extended with one " U " font haptic element downwards, wherein, wears the snap close end face near in the hole of testing button one end for one; Be provided with the pair of metal sheet on the next door of another pin;
The upper end of two sheet metals is unsettled, and when testing button was not pressed, the upper end of two sheet metals did not contact; Wherein, the lower end of a sheet metal is welded on the circuit board and links to each other with zero-power line by a resistance, and the lower end of another sheet metal also is welded on the circuit board and links to each other with power firestreak;
Described dropout slide block places in the longitudinally guiding groove of tripping coil front end, and sheet metal also places in the gathering sill of tripping coil front end;
Described dropout slide block and release, snap close, latch spring, the electric installation that resets be connected mutually become one can free movable integral body.
Described testing button is moved to primary importance downwards, and the tip of testing button arm presses downwards, promotes to take off mouthful slide block and laterally moves, and two metallic test on-chip terminal connections touch conducting and produce the simulation leakage current;
Described testing button continues to be moved to the second place downwards, the arm of testing button continues to compress described dropout slide block ramp downwards, promotion is taken off mouthful slide block and is continued laterally to move, and spurs the snap close action in the described mechanical trip device, makes reset button thread off by force/trip.
Under described elasticity zero-power line input sheet metal moving contact, be provided with a simulation leakage current current-limiting resistance, this resistance one is rectified facing to moving contact, the other end links to each other with live wire on the circuit board through described tripping coil, and contacting with disconnecting of moving contact and resistance constitutes a leakage current analog switch that links with reset button;
When earth leakage protective socket was in initial condition, the moving contact on the described elasticity zero-power line input sheet metal contacted leakage current analog switch closure with simulation leakage current current-limiting resistance; After earth leakage protective socket resetted, the moving contact on the described elasticity zero-power line input sheet metal disconnected with simulation leakage current current-limiting resistance, and the leakage current analog switch disconnects;
Connect the back reset button when being in trip status at the power input of earth leakage protective socket and the power line in the wall; the power input zero line links to each other with power firestreak on the circuit board through leakage current analog switch, simulation leakage current current-limiting resistance, tripping coil, constitutes to need not to operate any parts and can produce the loop of simulating leakage current automatically.
When reset button was in trip status after the power supply in earth leakage protective socket and wall connected, described leakage current analog switch was in closure state, and the sensitive switch that is made of the electric installation that resets is in off-state; In the process that reset button resets, the leakage current analog switch becomes from the state of not opening as yet, sensitive switch is closed that the leakage current analog switch is opened, the state of sensitive switch closure.
On described circuit board, be provided with one and be used for representing the whether homing light of end-of-life of earth leakage protective socket; On middle layer bracket, be provided with one and be used for representing whether earth leakage protective socket has the power supply output indicator of power supply output; Be provided with a light lead pipe of vertically placing above the indicator light at two, the top of this light lead pipe is positioned at the indicator lamp hole below of cap surface;
Described power supply output indicator is connected in parallel between earth leakage protective socket power output end live wire, the zero line; Described homing light is connected in the loop that makes described mechanical trip device action.
Because the utility model adopts above technical scheme; make the utility model not only have creepage protection function; and after the power firestreak in the utility model and wall, zero line were connected, need not to operate any parts can detect by automatic creepage protection function to earth leakage protective socket.Can make homing light Chang Liang when the earth leakage protective socket inner member is intact, can sets up correct reset mechanism automatically and also can reset, after resetting, power supply output indicator Chang Liang illustrates earth leakage protective socket energy operate as normal; When earth leakage protective socket inner member open circuit or short circuit are current leakage jack life termination; the utility model does not work by making homing light; and the mode that stops reset button to reset is represented earth leakage protective socket end-of-life; make the load output of earth leakage protective socket and the single-phase three-wire power supply output plughole of receptacle face all not have power supply output; when avoiding leaky occurring because of earth leakage protective socket end-of-life or its inner components and parts cisco unity malfunction that breaks down, the generation of dead accident but its user who still has power supply output to cause gets an electric shock.In addition; when certain the spare and accessory parts fault in the earth leakage protective socket; particularly when the tripping coil fault or controllable silicon opens circuit or the leakage current detecting element damages can't operate as normal the time, can cut off the power supply output of socket mechanically by force by pushing testing button.The utility model function is complete, fail safe good, and is safe in utilization, can guarantee user's personal safety and security appliance really.
Description of drawings
Fig. 1 is the utility model decomposition texture schematic diagram;
Fig. 2 is the utility model front view;
Fig. 3 removes front view behind the loam cake for the utility model;
Fig. 4 is that each module position concerns schematic diagram on the utility model circuit board;
Fig. 5-1 is the A-A partial sectional view of Fig. 3, and each module position concerns schematic diagram during the output of socket initial condition non-transformer;
Fig. 5-2 is the A-A partial sectional view of Fig. 3, pushes reset button each module position of moment and concerns schematic diagram;
Fig. 5-3 is the A-A partial sectional view of Fig. 3, and each module position concerned schematic diagram when reset button reset power socket operate as normal had power supply output;
Fig. 6-1 is the B-B partial sectional view of Fig. 3, and each module position concerns schematic diagram during the output of socket initial condition non-transformer;
Fig. 6-2 is the B-B partial sectional view of Fig. 3, pushes reset button each module position of moment and concerns schematic diagram;
Fig. 6-3 is the B-B partial sectional view of Fig. 3, and each module position concerned schematic diagram when reset button reset power socket operate as normal had power supply output;
Fig. 7-1 is the C-C partial sectional view of Fig. 3, and each module position concerned schematic diagram when the socket operate as normal had power supply output;
Fig. 7-2 is the C-C partial sectional view of Fig. 3, pushes testing button each module position of moment and concerns schematic diagram;
Fig. 7-3 is the C-C partial sectional view of Fig. 3, and each module position concerns schematic diagram when pushing the output of testing button supply socket operate as normal non-transformer;
Fig. 7-4 is the C-C partial sectional view of Fig. 3, continues to push testing button socket is threaded off by force, and each module position concerns schematic diagram when cutting off socket power output;
Fig. 8 is the utility model mechanical trip device decomposition texture schematic diagram;
Fig. 9 is the utility model control circuit physical circuit figure.
Embodiment
As shown in Figure 1, the disclosed earth leakage protective socket of the utility model mainly by housing, be installed in the earth leakage protective socket realized in the housing and have/circuit board 18 of non-transformer output constitutes.
Described housing is combined by loam cake 2, insulation middle layer bracket 3 and base 4; Between loam cake 2 and insulation middle layer bracket 3, be provided with metal ground connection mounting panel 1; Between insulation middle layer bracket 3 and base 4, be provided with circuit board 18.
As shown in Figure 1 and Figure 2, on loam cake 2, have power supply output plughole 5,6, reset button hole 8-A, testing button hole 7-A and status indicator lamp hole 30-A.Be provided with reset button (RESET) 8 and testing button (TEST) 7 in reset button hole 8-A and testing button hole 7-A, reset button 8 and testing button 7 pass metal ground connection mounting panel 1 and insulation middle layer bracket 3 and contact with assembly on the circuit board 18.Be provided with four grab 2-A in the side of loam cake 2, be used for fixing with the draw-in groove 4-B of base 4 inboards.
Metal ground connection mounting panel 1 links to each other with the earth by earthing screw 13-A, lead between loam cake 2 and insulation middle layer bracket 3.On metal ground connection mounting panel 1, should locate to be provided with ground connection blade 11,12 with the ground hole of loam cake 2 power supply output plugholes 5,6 is up and down vertical opposite.Two ends at metal ground connection mounting panel 1 are provided with installing hole 13B.
As Fig. 1, shown in Figure 3, be separately installed with a power firestreak output conductor 14 and a zero-power line output conductor 13 in the both sides of the middle layer bracket 3 that insulate.At the two ends of power supply output conductor 13,14, should locate to be provided with sheet clip leaf wing 60,61,62,63 with null line hole, the live wire hole of loam cake 2 power supply output plugholes 5,6 are up and down vertical opposite.On power supply output conductor 13,14, be respectively equipped with two fixed contacts 15,52 and 16,53, form two groups of fixed contacts 15,16 and 52,53.
As shown in Figure 1, base 4 is used to hold middle layer bracket 3 and circuit board 18.The bilateral symmetry of base 4 be provided with a pair of zero-power line, live wire input wires screw 9,10 and a pair of zero-power line, live wire output connection screw 109,110.
Core component of the present utility model is mounted in the circuit board 18 in the housing, the power supply output connection screw 109,110 that it has the power supply output plughole 5,6 that makes on the socket loam cake 2, base 4 both sides has/or non-transformer output and detect earth leakage protective socket whether end-of-life, show testing result, the function that mechanically socket is threaded off by force.
As Fig. 1, shown in Figure 4, this circuit board 18 is provided with two elasticity zero-power lines, live wire input sheet metal 50,51.One end of elasticity power supply input sheet metal 50,51 is bent downwardly 90 degree, passing differential differentiating transformer 19 is welded on the circuit board 18 with power supply input wires sheet 24,25, link to each other with zero-power line, live wire input wires screw 9,10, zero-power line input wires screw 9 links to each other with zero-power line in the wall by lead, and power firestreak input wires screw 10 links to each other with power firestreak in the wall by lead; The other end of elasticity power supply input sheet metal 50,51 is respectively equipped with moving contact 54 and 55.Moving contact 54,55 respectively with the power supply output conductor 13,14 that is arranged on the middle layer bracket 3 on one group of fixed contact 52,53 (as shown in Figure 3) up and down vertical opposite should, contact/or disconnect to constitute two pairs of mains switches.Above circuit board 18, both sides also are provided with two elasticity and connect output sheet metals 20,21; The end that elasticity connects output sheet metal 20,21 is welded on the circuit board with zero-power line, 80,81 contacts of live wire output, and link to each other with the power supply output connection screw 109,110 that is arranged on base 4 both sides, the other end is provided with moving contact 22,23, this to moving contact 22,23 respectively with power supply output conductor 13,14 on another group fixed contact 15,16 up and down vertical opposite should (as shown in Figure 3), contact/or disconnect and constitute two pairs of mains switches.The dynamic and static contact that above-mentioned power supply input sheet metal 50,51, power supply output conductor 13,14 are connected on the output sheet metal 20,21 with elasticity constitutes zero line, two groups of four pairs of mains switches 54 of live wire and 52,22 and 15,55 and 53,23 and 16 altogether, correspond respectively to the K switch R-2-2 on the circuit diagram 9, KR-3-2, KR-2-1, KR-3-1.
Also be provided with the differential differentiating transformer 19 that is used to detect leakage current on circuit board 18, as shown in Figure 9, power firestreak HOT, zero line WHITE pass differential differentiating transformer 19 (L1 among Fig. 9, L2).When leaky occurring in the current supply circuit; differential differentiating transformer will detect control chip IC1 (model is LM1851/RV4145) to leakage current by output voltage signal; the pin one of chip IC 1 output control signal makes mechanical trip device action on the circuit board 18 by controllable silicon V5; make the earth leakage protective socket tripping operation, cut off the power supply output of earth leakage protective socket.
As Fig. 1, Fig. 4, Fig. 5-1, Fig. 6-1, shown in Figure 8, on circuit board 18, also be provided with can make elasticity power supply input sheet metal 50,51 is connected with power supply output conductor 13,14 electric power/or disconnect and by power supply output conductor 13,14 make elasticity connect the output sheet metal 20,21 charged/or cut off the power supply, and then make power output end 80,81 charged/or the mechanical trip device that cuts off the power supply.This mechanical trip device comprises release 28, the electric installation 65-A that resets, reset guide post 35, back-moving spring 91, snap close 30, latch spring 34, dropout slide block 37 and tripping coil 26.
Shown in Fig. 4, Fig. 6-1, be provided with a vertical central perforation 29 at the top of release 28, the reset guide post 35 that is with back-moving spring 91 that is embedded in reset button 8 bottom surfaces can move up and down along central perforation 29.Have the locked groove 36 of a circle depression in the bottom of reset guide post 35, close its bottom, the bottom surface of reset guide post 35 is the plane.
At the middle part of release 28, cross release 28 and be provided with " L " shape snap close 30 of movably making by metal material, be provided with bonnet lock hole 31 at the end face of snap close 30.When earth leakage protective socket initial condition non-transformer was exported, the bonnet lock hole 31 that is contained in reset guide post 35 and snap close 30 end faces in release 28 central perforations 29 was the dislocation shape.Between the lateral wall of release 28 and snap close 30 madial walls, be provided with a circular recess 33, be built-in with latch spring 34.Be provided with a tripping coil 26 that is built-in with movable core 42 in the outside of snap close 30 sidewalls.Tripping coil 26 built-in movable cores 42 face the sidewall of snap close 30.Snap close 30 can move forward and backward under the effect of iron core 42, thereby reset button 8 is resetted or threads off (tripping operation).
Shown in Fig. 8, Fig. 5-1, Fig. 6-1,, be provided with the electric installation 65-A that resets in the bottom of release 28.This electric installation 65-A that resets comprises 65, two " F " shapes of reset switch box conducting strip 66,67, conducting bridge 72 and guide spring 71.Staggered relatively respectively in the both sides of reset switch box 65 have " F " shape conducting strip 66,67, wherein, the lower end of " F " shape conducting strip 67 links to each other with power ground by a controllable silicon, and another " F " shape conducting strip 66 lower ends link to each other with the live wire of ac power input end by tripping coil; The inside of switch enclosure is provided with a conducting bridge 72, and the two ends of conducting bridge are respectively equipped with an electrical contact 68,69, lead 70 of middle part riveted joint of conducting bridge 72; Be with a guide spring 71 on the lead 70; Be provided with a perforation in the middle of the bottom of reset switch box 65, lead 70 passes this perforation and stretches out circuit board 18, lead 70 fixing, guide effects; The conducting bridge 72 that electrical contact 68,69 is riveted at two ends respectively places between two " F " shape conducting strip 66,67 upper opening places staggered relatively, it from static state to the reset mode under the effect of guide spring 71, along with release 28 together along in " F " shape sheet metal 68,69 open side, upper and lower position moves.
As Fig. 4, Fig. 6-1, shown in Figure 8, under testing button 7, be provided with a dropout slide block 37.The end face of dropout slide block 37 is provided with an inclined downward 37-A, and the pointed top of arm 40A that testing button 7 extends downwards is located in this inclined-plane 37-A top.The bottom surface of dropout slide block 37 is extended with one " U " font haptic element downwards, and wherein, a pin 37-C passes snap close 30 end faces near in the hole 32 of testing button one end; Be provided with pair of metal sheet 46,47 on the next door of another pin 37-B.
The upper end of sheet metal 46,47 is unsettled, and when testing button 7 was not pressed, because dropout slide block 37 does not slide, the upper end of sheet metal 46,47 did not contact; The lower end of sheet metal 46 is welded on the circuit board and links to each other with zero-power line by a resistance (R3-1 among Fig. 9), and the lower end of sheet metal 47 also is welded on the circuit board and links to each other with power firestreak.
Shown in Fig. 1, Fig. 4, Fig. 6-1; outside the coil of tripping coil 26, be provided with a coil protect cover 41; respectively be provided with a pair of latch hook 41-A, 41-B on the end face of coil protect cover, the bottom surface; the coil protect cover fixes on wiring board 18 by a pair of latch hook 41-B that is arranged on the bottom surface, and described output elasticity connects output sheet metal 20,21 does not have an end of moving contact closely to contact with power output end 80,81 on coil protective cover 41 by the latch hook 41-A fixing and locking on the coil protect cover end face.When the assembling earth leakage protective socket, an end of middle layer bracket 3 is pushed down this coil protect cover 41.
Shown in Fig. 5-1～Fig. 5-3, Fig. 6-1～Fig. 6-3, the utility model is arranged on the circuit board 18, the electric installation 65-A that resets of release 28 bottoms constitute one with sensitive switches (the K switch R-4 among Fig. 9) reset button 8 interlocks, that react reset button 8 states.Reset among the electric installation 65-A, the conducting bridge 72 that electrical contact 68,69 is riveted at two ends respectively places between two " F " shape conducting strip 66,67 upper opening places staggered relatively, it from static state to the reset mode under the effect of guide spring 71, along with release 28 together along in " F " shape sheet metal 66,67 open side, upper and lower position moves.
As Fig. 5-1, Fig. 6-1, shown in Figure 9, when reset button 8 is in trip status, the conducting bridge 72 that electrical contact 68,69 is riveted at two ends respectively just in time is positioned at groove 66-C, the 67-C in the middle of two " F " shape conducting strips staggered relatively 66,67, and sensitive switch KR-4 is an off-state;
As Fig. 5-2, Fig. 6-2, shown in Figure 9, when reset button 8 is pressed, release 28 is pressed towards down and moves, pressing conducting bridge 72 to move vertically downward with lead 70, guide spring 71, when the top of snap close 30 is run in the bottom of reset guide post 35, electrical contact 68,69 lower surfaces on conducting bridge 72 both sides just contact conducting with two " F " shape conducting strip 66,67 bottoms staggered relatively outstanding position 66-B, 67-B, and sensitive switch KR-4 is closure state;
As Fig. 5-3, Fig. 6-3, shown in Figure 9, when the locked groove 36 of reset guide post 35 bottoms is buckled in the bonnet lock hole 31 of snap close 30, release along with reset button, under the effect of the back-moving spring on the reset guide post 35 91, reset guide post 35 move up make back-moving spring 91 be released the pulling release 28 make progress simultaneously, under the effect of lead 70 and guide spring 71, conducting bridge 72 also moves up thereupon, make the electrical contact 68 on conducting bridge both sides, 69 upper surfaces and the outstanding position 66-A in two " F " shape conducting strip tops staggered relatively, 67-A contacts conducting, and sensitive switch KR-4 is a closure state.
So, the sensitive switch KR-4 that the utility model constitutes by the electric installation 65-A that resets represents the state of reset button 8, when the electrical contact 68,69 on the conducting bridge 72 was positioned at conducting strip 66,67 intermediate groove position 66-C, 67-C, expression reset button 8 was in trip status; Electrical contact 68,69 on the conducting bridge 72 protrudes position 66-B with conducting strip 66,67 bottoms, when 67-B contacts conducting, represents that reset button 8 is pressed; Electrical contact 68,69 on the conducting bridge 72 is with the outstanding position 66-A in conducting strip 66,67 tops, when 67-A contacts conducting, and expression reset button 8 is in reset mode.
As Fig. 5-1, shown in Figure 9, the utility model is under the moving contact 54 on the elasticity zero-power line input sheet metal 50, be provided with a simulation leakage current current-limiting resistance R88, this resistance one is rectified facing to moving contact 54, the other end links to each other with live wire on the circuit board through tripping coil, contact and the disconnection of moving contact 54 and resistance R 88 constitutes a leakage current analog switch that links with reset button 8, as the K switch R-1 among Fig. 9.When reset button 8 is in trip status, after as long as zero-power line, live wire in the power input terminal screw 9,10 of earth leakage protective socket and the wall connect, the end that resistance R 88 makes progress just contacts with moving contact 54, leakage current analog switch KR-1 closure, zero-power line links to each other with power firestreak through leakage current analog switch KR-1, resistance R 88, tripping coil, forms to need not to operate the loop that any parts can produce the simulation leakage current automatically; At this moment, the electrical contact 68,69 on the conducting bridge 72 is positioned at conducting strip 66,67 intermediate groove position 66-C, 67-C place (shown in Fig. 5-1), and promptly the K switch R-4 that is made of the electric installation 65-A that resets is in off-state.Press reset button, the electrical contact 68,69 on the conducting bridge 72 protrudes position 66-B, 67-B with conducting strip 66,67 bottoms and contacts conducting (shown in Fig. 5-2), and promptly the K switch R-4 that is made of the electric installation 65-A that resets is in closure state; Because release 28 moves down, zero-power line input sheet metal 50 is positioned at the top that arm is carried in the release side, still keep original position, the moving contact 54 on it continues the contact condition of maintenance and resistance R 88, and leakage current analog switch KR-1 still is a closure state.Continue to push reset button, when the locked groove 36 of reset guide post 35 bottoms is buckled in the bonnet lock hole 31 of snap close 30, release along with reset button, reset guide post 35 moves up, driving release 28 moves up, make and be positioned at the zero-power line input sheet metal of carrying on the arm release 28 sides 50 and on driving, moved, moving contact 54 separates disconnection with resistance R 88, leakage current analog switch KR-1 disconnects, and the moving contact 54 on the zero-power line input sheet metal 50 contacts conducting with the fixed contact 52 on the zero-power line output conductor 13; Electrical contact 68,69 on the conducting bridge 72 contacts conducting with conducting strip 66,67 tops outstanding position 66-A, 67-A, and (shown in Fig. 5-3), promptly the K switch R-4 that is made of the electric installation 65-A that resets still is in closure state.
Fig. 9 is the utility model earth leakage protective socket (GFCI) internal control circuit physical circuit figure.As shown in the figure, control circuit is mainly by the differential differentiating transformer L1 (200: 1) and the L2 (1000: 1) that are used to detect leakage current, leakage current detects control chip IC1 (LM1851/RV4145), be built-in with the tripping coil 26 (SOL) of iron core, controllable silicon V5, leakage current analog switch KR-1 with reset button RESET interlock, be connected on the K switch R-2-1 in the supply line, KR-2-2, KR-3-1, KR-3-2, sensitive switch KR-4, homing light V6, power supply output indicator V7 and test resistance R88 and the diode that some are relevant, resistance, compositions such as electric capacity.
Live wire HOT in the earth leakage protective socket supply line, zero line WHITE pass differential differentiating transformer L1, L2, differential differentiating transformer L1, L2 leakage current detection signal output link to each other with the signal input part 2,3,5,4 that leakage current detects control chip IC1, and the control signal output ends 1 that leakage current detects control chip IC1 links to each other with the gate pole of controllable silicon V5; The negative electrode of controllable silicon V5 links to each other with dc power cathode, and the anode of controllable silicon V5 is through linking to each other with power firestreak HOT with sensitive switch KR-4, the tripping coil SOL of reset button RESET interlock; The iron core that is built in the tripping coil SOL makes reset button RESET reset/or thread off by mechanical trip gear, makes K switch R-2-1, KR-2-2, KR-3-1, KR-3-2 closure/or disconnect.
Between earth leakage protective socket power output end live wire, zero line, be connected with power supply output indicator V7; In controllable silicon V5 conducting loop, be in series with homing light V6.
Power input zero line WHITE passes test coil L1 (200: 1) and L2 (1000: 1), link to each other with power input live wire HOT through leakage current analog switch KR-1, simulation leakage current current-limiting resistance R88, tripping coil 26 (SOL), constitute simulation leakage current generating loop.After this circuit connects the power line in the power input of earth leakage protective socket and the wall, need not to operate any parts and can produce a simulation leakage current automatically.
Connect the back reset button when not resetting at the power input of earth leakage protective socket and the power supply in the wall; because KR-1 is in closure state; by above-mentioned simulation leakage current generating loop; need not to operate any parts and can produce the simulation leakage current automatically; leakage current flows through detection of electrical leakage coil L2 (1000: 1); magnetic test coil induces the voltage signal of certain value; voltage signal is by coupling capacitance C9; be input to the signal input part 2 of IC1; 3; positive feedback outputs to 5 pin through IC1; 4 pin (public pole); pass through C1 again; C2; L1 (200: 1) is fed to L2 (1000: 1); be transmitted back to the signal input part 3 of IC1 by C9; 2; after signal is exaggerated; export the gate pole of high-level control signal to controllable silicon V5 from 1 pin of IC1, controllable silicon V5 is triggered, anodal and negative pole conducting; the homing light V6 that is connected in the indicating circuit between AB will be luminous; expression earth leakage protective socket function is intact, has creepage protection function, and reset button can reset.Otherwise if earth leakage protective socket end-of-life, then homing light V6 is not luminous all the time; Because current leakage jack life termination; not conducting of controllable silicon V5; all the time there is not electric current to flow through in the tripping coil 26; can't produce magnetic field, its inner iron core is failure to actuate, and mechanical trip gear is failure to actuate all the time; reset button can not be reset all the time; thereby prompting user this earth leakage protective socket is end-of-life, the earth leakage protective socket that should more renew.
Shown in Fig. 9, Fig. 5-2, Fig. 6-2, press reset button, leakage current analog switch KR-1 does not disconnect as yet, and K switch R-4 is closed, and this moment, the voltage at former AB two ends was added on the tripping coil (SOL) 26 because the closure of KR-4 makes A point and B point short circuit, make tripping coil SOL have certain electric current to flow through and produce magnetic field, inner iron core is done ballistic motion, and snap close 30 is opened, reset button can reset (shown in Fig. 5-3, Fig. 6-3); The light-emitting diode V6 that is connected to simultaneously between A point, B point is in cut-off state, and the V6 lamp goes out, and leakage current analog switch KR-1 disconnects, and the simulation leakage current disappears.After resetting, since K switch R2-1, KR2-2, KR3-1, the closure of KR3-2 is lighted the power supply output indicator V7 that is connected between power firestreak, the zero line, shows that the single-phase three-wire jack of receptacle face and load output all have power supply output.If current leakage jack life termination; all the time there is not big electric current to flow through in the tripping coil (SOL) 26; can't produce magnetic field; its inner iron core can not promote snap close 30 actions; reset button can not reset all the time; the single-phase three-wire jack on earth leakage protective socket surface and load output all do not have power supply output, and homing light V6 and power supply output indicator V7 all do not work.
When function of socket is intact, after earth leakage protective socket correctly inserts power supply, press reset button RESET after, load end LOAD and receptacle face have electric power output, socket operate as normal (shown in Fig. 5-3, Fig. 6-3).This moment is when having leakage current generating in the circuit, because power firestreak HOT and zero line WHITE pass described leakage current magnetic test coil L1 (200: 1) and L2 (1000: 1) simultaneously, two lines pass the vector of electric current of magnetic test coil and non-vanishing in the circuit, magnetic test coil induces the voltage signal of certain value at once, voltage signal is by coupling capacitance C9, be input to the signal input part 2 of IC1,3, through behind the IC1 again by positive feedback output 5,4 (public poles) pass through C1, C2, L1 (200: 1) is fed to L2 (1000: 1), be transmitted back to the signal input part 3 of IC1 by C9,2, signal amplifies, export the gate pole of dropout control signal from 1 pin of IC1 to controllable silicon V5, controllable silicon V5 is triggered, positive pole and negative pole conducting, thereby making the positive pole place B point of controllable silicon V5 is electronegative potential, because this moment, K switch R-4 was a closure state, A point and B point are same point, because of the other end of coil 26 links to each other with power firestreak, the two ends of coil 26 will obtain the voltage of certain value, there is certain electric current to flow through, produce magnetic field, its inner iron core is done ballistic motion, reset button is threaded off, the output of cutting off the electricity supply, as Fig. 5-1, shown in Fig. 6-1, power supply output indicator V7 extinguishes, and homing light V6 is bright.
The utility model can also manually produce the simulation leakage current by pushing testing button TEST, detects whether end-of-life of earth leakage protective socket; Can also carry out machinery dropout by force by continuing to push testing button TEST simultaneously, cut off the power supply output of earth leakage protective socket.Shown in Fig. 7-1, under testing button 7, be provided with a dropout slide block 37.The end face of dropout slide block 37 is provided with an inclined downward 37-A, and the pointed top of the arm 40A that testing button 7 extends downwards is located in this inclined-plane 37-A top.The bottom surface of dropout slide block 37 is extended with one " U " font haptic element downwards.End at the close testing button 7 of snap close 30 end faces is provided with a hole 32, and a pin 37-C in " U " font haptic element that extend downwards dropout slide block 37 bottom surfaces passes snap close 30 end faces near in the hole 32 of testing button one end; Be provided with pair of metal sheet 46,47 on the next door of another pin 37-B.The upper end of sheet metal 46,47 is unsettled, and the lower end of sheet metal 46 is welded on the circuit board and links to each other with zero-power line by a resistance (R3-1 among Fig. 9), and the lower end of sheet metal 47 also is welded on the circuit board and links to each other with power firestreak.When testing button 7 was not pushed downwards, because dropout slide block 37 does not slide, the upper end of sheet metal 46,47 did not contact.
Shown in Fig. 7-2, push testing button 7 downwards to primary importance, dropout slide block 37 inclined-plane 37-A are pushed in the testing button lower end, make dropout slide block 37 horizontal mobile push to test sheet metals 46, contact with sheet metal 47 until test sheet metal 46, artificial simulation produces leakage current.Have creepage protection function if earth leakage protective socket is working properly, shown in Fig. 7-3, earth leakage protective socket mechanical trip device should move, and snap close 30 actions make reset button 8 dropouts/tripping operations, and the power supply of cut-out earth leakage protective socket is exported.If testing button 7 still can not be made the socket tripping operation by make 47 contacts of test sheet metal 46, sheet metal produce the simulation leakage currents to primary importance downwards from inactive state, this earth leakage protective socket end-of-life is described.At this moment, shown in Fig. 7-4, can continue to push testing button 7 cuts off socket by force by mechanical device to the second place power supply output downwards.Shown in Fig. 7-4; after current leakage jack life termination can't trip; can continue to push testing button 7 downwards; the arm 40A that testing button 7 is extended downwards presses dropout slide block end face 37-A; make dropout slide block 37 continue crosswise movement; a pin 37-C of the dropout slide block 37 by stretching into the square hole 32 on the snap close 30; pulling snap close 30 moves; reset guide is leant on 35 the hole 31 of locked groove 36 from snap close 30 to be jumped out; taking off mouthpart 28 falls; elasticity power supply input sheet metal 50; 51; elasticity connects output sheet metal 20; 21 fall simultaneously; make its moving contact and power supply output conductor 13; fixed contact on 14 disconnects, power supply output conductor 13; 14; power output end 80; 81 is not all charged.Because power supply output conductor 13,14, power output end 80,81 are all not charged, cut off the power supply output of socket by force.
When whether just often detecting the earth leakage protective socket function; also can push testing button TEST; make sheet metal 46; end in contact conducting on 47; produce the simulation leakage current; if earth leakage protective socket is working properly; there is not end-of-life; the voltage signal that magnetic test coil can induce certain value is input to the input 2 of IC1; 3; excitation through positive feedback end 7; 1 pin of IC1 is exported the electric leakage triggering signal immediately, and this signal is input to the gate pole of controllable silicon V5, and controllable silicon V5 is triggered; positive pole and negative pole conducting; because this moment, K switch R-4 was in off-state, passed through coil 26 from power firestreak; resistance R 4; light-emitting diode V6; controllable silicon V5 flows to the common ground end and forms current path, and indicator light V6 is lighted; the expression function of socket is intact, can reset.When earth leakage protective socket internal fault occurs and is end-of-life; press testing button 7; because earth leakage protective socket inner member fault; make the detection of electrical leakage afunction; 1 pin of IC1 does not have control signal output; controllable silicon V5 can not be triggered; be in nonconducting state; the normal indicator light V6 of function of socket just can not lighted yet; therefore tripping coil 26 can not get electric, pushes reset button and can not finish and reset, and illustrates that internal fault has appearred in this earth leakage protective socket; promptly end-of-life should in time be changed earth leakage protective socket.
If the fault of earth leakage protective socket is not eliminated, the mechanical trip device can't move, and leakage current analog switch KR-1 does not open all the time, stops reset button can't reset all the time, and earth leakage protective socket does not have electric power output.
In above various situations, the control signal of exporting from 1 pin of IC1 must suppress the generation of false triggering through being attempted by the filtering of the anti-interference capacitor C 7 between silicon controlled control end and the ground.
Shown in Fig. 9, Fig. 1, Fig. 5-1, the utility model is provided with the homing light V6 (R) of a redness on circuit board 18, is used for representing whether end-of-life of earth leakage protective socket; On middle layer bracket 3, be provided with a green or yellow power supply output indicator V7 (G), be used for representing whether the operating state of earth leakage protective socket promptly has power supply output.They, expose from status indicator lamp hole 30-A shown in Figure 2 the surface of the anaclasis of being sent to earth leakage protective socket by light lead pipe D.After the power input of earth leakage protective socket and the power firestreak in the wall, zero line connected, as long as earth leakage protective socket does not have end-of-life, still has creepage protection function, homing light V6 was bright; If current leakage jack life termination, homing light V6 does not just work.When earth leakage protective socket did not have end-of-life and power supply output is arranged, homing light V6 extinguished, and V7 is bright for the power supply output indicator; Otherwise when earth leakage protective socket did not have end-of-life and do not have power supply output, homing light V6 was bright, and power supply output indicator V7 does not work.So, the user can the state by indicator light V6, V7 judge earth leakage protective socket whether end-of-life with and operating state.
As shown in Figure 4, the utility model also is connected with elasticity below the elasticity power supply input sheet metal 50,51 export sheet metal 20,21 below, be provided with two pairs of position-limited blocks 43,44 and 73,74.
In sum, because the utility model adopts above technical scheme, so the disclosed earth leakage protective socket of the utility model has following outstanding function:
(1) after the power line in earth leakage protective socket power input and the wall connects; need not to operate any parts; just can produce the simulation leakage current automatically, detect earth leakage protective socket and whether still have the i.e. end-of-life whether of creepage protection function, and show the function of testing result
A. homing light Chang Liang when the earth leakage protective socket inner member is intact, expression can be set up correct reset mechanism automatically and can be resetted, and after resetting, power supply output indicator Chang Liang illustrates that earth leakage protective socket can operate as normal;
B. when earth leakage protective socket inner member open circuit or short circuit are end-of-life; homing light does not work; represent this earth leakage protective socket end-of-life; and stop reset button to reset, make the load output of earth leakage protective socket and the single-phase three-wire power supply output plughole of receptacle face all not have power supply output.
(2) has mechanical tripping function
Components and parts in earth leakage protective socket; when the tripping coil that especially can produce impact lost efficacy, promptly during end-of-life, can make earth leakage protective socket tripping operation/dropout mechanically by force; cut off the output of its power supply by force, and make this earth leakage protective socket of end-of-life can't reset again.
(3) have manual detection and demonstration testing result function
A. produce leakage current when manual simulation, earth leakage protective socket can be threaded off/be tripped, and homing light Chang Liang illustrates that earth leakage protective socket can operate as normal, and can reset, after resetting, and power supply output indicator Chang Liang;
B. produce leakage current when manually simulating; earth leakage protective socket can not be threaded off/be tripped; homing light does not work; this earth leakage protective socket end-of-life is described; the utility model can stop reset button to reset, and makes the load output of earth leakage protective socket and the single-phase three-wire power supply output plughole of receptacle face all not have power supply output.
(4) has the defencive function that prevents the reverse wiring mistake
When erector or electrician are connected to the power line in the wall on the earth leakage protective socket output mistakenly; as shown in Figure 9; the utility model need not to operate the circuit that any parts can produce the simulation leakage current automatically can't produce leakage current; detection of electrical leakage chip IC 1 can't produce control signal; make not conducting of controllable silicon V5; there is not electric current to flow through in the tripping coil SOL; can't produce magnetic field and promote built-in iron core action wherein; make mechanical trip gear action; automatically stop reset button to reset; the output of socket non-transformer, homing light does not work, and shows wiring error.After the erector had only wiring correct, homing light was just bright, and reset button just can reset, and the earth leakage protective socket power output end just has power supply output.
The utility model has the advantages that: function is complete, fail safe good, and is safe in utilization, can guarantee user's personal safety.
The above is specific embodiment of the utility model and the know-why used, and is any based on the equivalent transformation on the technical solutions of the utility model basis, all belongs within the utility model protection range.
Claims (13)
1. earth leakage protective socket with life end checking function, it comprises housing, be installed in the earth leakage protective socket realized in the housing has/circuit board (18), elasticity power firestreak, zero line input sheet metal (51,50), power firestreak, zero line output conductor (14,13), power firestreak, the zero line output (81,80) of non-transformer output, be used to detect the differential differentiating transformer (19) of leakage current; It is characterized in that:
On described circuit board (18), be equipped with power supply input sheet metal (51,50) is connected with power supply output conductor (14,13), power output end (81,80) electric power/or the mechanical trip device of disconnection;
This mechanical trip device comprises release (28), the electric installation that resets (65-A), snap close (30), latch spring (34), reset guide post (35), back-moving spring (91) and tripping coil (26);
Release (28) be positioned at reset button (8) under, be a cylinder; Its left and right sides stretches out to form and carries arm, and described elasticity power supply input sheet metal (50,51) is connected output sheet metal (20,21) and is positioned at the top that arm is carried in release (28) left and right sides with a pair of elasticity, and can move up and down along with release (28);
Be provided with a vertical central perforation (29) at the top of release (28), the reset guide post (35) that is with back-moving spring (91) that is embedded in reset button (8) bottom surface can move up and down along central perforation (29); The bottom of described reset guide post (35), close its bottom have the locked groove (36) of a circle depression;
At the middle part of release (28), cross release (28) and be provided with " L " shape snap close (30) of movably making by metal material, be provided with bonnet lock hole (31) at the end face of snap close (30); The bonnet lock hole (31) that is contained in interior reset guide post (35) of release (28) central perforation (29) and snap close (30) end face is the dislocation shape;
Between the sidewall of release (28) and snap close (30) madial wall, be provided with a latch spring (34);
Be provided with the electric installation (65-A) that resets in the bottom of release (28); This electric installation that resets (65-A) comprises reset switch box (65), two " F " shape conducting strips (66,67), conducting bridge (72) and guide spring (71); Staggered relatively respectively in the both sides of reset switch box (65) have " F " shape conducting strip (66,67), wherein, the lower end of " F " shape conducting strip (67) links to each other with power ground by a controllable silicon, and another " F " shape conducting strip (66) lower end links to each other with the live wire of ac power input end by tripping coil; Conducting bridge (72) is arranged on reset switch box inside, and the two ends of conducting bridge are respectively equipped with an electrical contact (68,69), a middle part riveted joint downward lead (70) of conducting bridge (72); Be with guide spring (71) on the lead (70); Be provided with a perforation in the middle of the bottom of reset switch box (65), lead (70) passes this perforation and stretches out circuit board (18); The conducting bridge (72) that electrical contact (68,69) is riveted at two ends respectively places between two " F " shape conducting strip (66,67) upper opening places staggered relatively, it from static state to the reset mode under the effect of guide spring (71), along with release (28) together, along in " F " shape sheet metal (66, the 67) open side, upper and lower position moves;
Be provided with a tripping coil (26) that is built-in with movable core (42) in the outside of snap close (30) sidewall, the built-in movable core (42) of tripping coil (26) faces the sidewall of snap close (30); This snap close (30) laterally moves and reset button (8) is resetted or threads off/trip.
2. the earth leakage protective socket with life end checking function according to claim 1 is characterized in that: described release (28) places in the longitudinally guiding groove (41-C) of tripping coil front end;
The mutual linking of release (28), snap close (30), latch spring (34) and the electric installation that resets (65-A) becomes one can free movable integral body.
3. the earth leakage protective socket with life end checking function according to claim 1 and 2 is characterized in that: the described electric installation that resets (65-A) constitutes that link with reset button (8), as to react reset button (a 8) state sensitive switch (KR-4);
The reset button of earth leakage protective socket (8) is when being in trip status, electrical contact (68,69) on the conducting bridge (72) in the described electric installation that resets (65-A) is positioned at two " F " shape conducting strips (66,67) intermediate groove positions (66-C, 67-C) staggered relatively to be located, and promptly sensitive switch (KR-4) is in off-state;
Reset button (8) is when being pressed, described release (28) is pressed towards down and moves, the electrical contact (68,69) on conducting bridge (72) both sides in the described electric installation that resets (65-A) contacts conducting with outstanding position (66-B, 67-B), two " F " shape conducting strips (66,67) bottom staggered relatively, and sensitive switch (KR-4) is closure state;
Reset button (8) is when being in reset mode, and the electrical contact on the conducting bridge (72) (68,69) contacts conducting with outstanding position (66-A, 67-A), conducting strip (66,67) top, and promptly sensitive switch (KR-4) is in closure state.
4. the earth leakage protective socket with life end checking function according to claim 3 is characterized in that: described mechanical trip device also includes a dropout slide block (37);
This dropout slide block (37) be positioned at earth leakage protective socket testing button (7) under, its end face is provided with an inclined downward (37-A), and the pointed top of the arm that is with spring (40) (40A) that testing button (7) extends downwards is located in top, this inclined-plane (37-A); The bottom surface of dropout slide block (37) is extended with one " U " font haptic element downwards, and wherein, a pin (37-C) passes snap close (30) end face near in the hole (32) of testing button one end; Be provided with pair of metal sheet (46,47) on the next door of another pin (37-B);
The upper end of two sheet metals (46,47) is unsettled, and when not being pressed, the upper end of two sheet metals (46,47) does not contact at testing button (7); Wherein, the lower end of a sheet metal (46) is welded on the circuit board and links to each other with zero-power line by a resistance, and the lower end of another sheet metal (47) also is welded on the circuit board and links to each other with power firestreak;
Described dropout slide block (37) places in the longitudinally guiding groove (41-C) of tripping coil front end, and sheet metal (46,47) also places in the gathering sill (41-C) of tripping coil front end;
Described dropout slide block (37) and release (28), snap close (30), latch spring (34), the electric installation that resets (65-A) is connected mutually become one can free activity integral body.
5. the earth leakage protective socket with life end checking function according to claim 4, it is characterized in that: described testing button (7) is moved to primary importance downwards, the tip of testing button (7) arm (40A) presses downwards, it is laterally mobile that a mouthful slide block (37) is taken off in promotion, and two metallic test sheets (46,47) are gone up the end in contact conducting and produced the simulation leakage current;
Described testing button (7) continues to be moved to the second place downwards, the arm (40A) of testing button (7) continues to compress described dropout slide block ramp (37-A) downwards, promotion is taken off a mouthful slide block (37) and is continued laterally to move, spur snap close (30) action in the described mechanical trip device, make reset button (8) dropout/tripping operation by force.
6. according to claim 1 or 2 or 4 or 5 described earth leakage protective sockets, it is characterized in that with life end checking function:
One end of described power firestreak input sheet metal (51) passes described differential differentiating transformer (19) and is welded on the circuit board (18) with power supply input wires sheet (25), link to each other with power firestreak in the wall by power firestreak input wires screw (10), the other end is provided with a moving contact (55); One end of zero-power line input sheet metal (50) passes described differential differentiating transformer (19) and is welded on the circuit board (18) with power supply input wires sheet (24), link to each other with zero-power line in the wall by zero-power line input wires screw (9), the other end is provided with a moving contact (54);
Described power firestreak output (81) connects output sheet metal (21) contact with the elasticity that is arranged on circuit board (18) top and is welded on the circuit, and link to each other with power firestreak output connection screw (110), the other end that connects output sheet metal (21) in elasticity is provided with a moving contact (23); Zero-power line output (80) connects output sheet metal (20) contact with another elasticity that is arranged on circuit board (18) top and is welded on the circuit board, and link to each other with zero-power line output connection screw (109), the other end that connects output sheet metal (20) in elasticity also is provided with a moving contact (22);
Described power firestreak output conductor (14) and zero-power line output conductor (13) are arranged on housing middle layer bracket (3) both sides; Be provided with two sheet clip leaf wings (62,63) on power firestreak output conductor (14), two sheet clip leaf wings (62,63), two supply hubs (5, the 6) firewire jack with receptacle face respectively are vertical up and down corresponding; Also be provided with two sheet clip leaf wings (60,61) on the zero-power line output conductor (13), two sheet clip leaf wings (60,61), two supply hubs (5, the 6) zero line jack with receptacle face respectively are vertical up and down corresponding;
On power firestreak output conductor (14), be provided with two fixed contacts (16 and 53); On zero-power line output conductor (13), be provided with two fixed contacts (15 and 52);
Moving contact (55) on the power firestreak input sheet metal (51) is vertical up and down corresponding with the fixed contact (53) on the power firestreak output conductor (14), contact/or disconnect the formation pair of switches; The moving contact (23) that elasticity connects on the output sheet metal (21) is vertical up and down corresponding with another fixed contact (16) on the power firestreak output conductor (14), contact/or the disconnection formation another to switch; Moving contact (54) on the zero-power line input sheet metal (50) is vertical up and down corresponding with the fixed contact (52) on the zero-power line output conductor (13), contact/or it is another to switch to disconnect formation; The moving contact (22) that elasticity connects on the output sheet metal (20) is vertical up and down corresponding with another fixed contact (15) on the zero-power line output conductor (13), contact/or disconnection constitute pair of switches again; Come to four pairs of contacts (55 and 53,23 and 16,54 and 52,22 and 15) and constitute live wire, two groups of four pairs of switches of zero line.
7. the earth leakage protective socket with life end checking function according to claim 6 is characterized in that: the moving contact (55) on the described power firestreak input sheet metal (51) is connected the position that release (28) one sides of moving contact (23) in the mechanical trip device of exporting on the sheet metal (21) carry above the arm and is mutual cross-like with elasticity;
Moving contact (54) on the described zero-power line input sheet metal (50) is connected the position that release (28) opposite side of moving contact (22) in the mechanical trip device of exporting on the sheet metal (20) carry above the arm with another elasticity also be to be mutual cross-like.
8. the earth leakage protective socket with life end checking function according to claim 7, it is characterized in that: under described elasticity zero-power line input sheet metal (50) moving contact (54), be provided with a simulation leakage current current-limiting resistance (88), this resistance one is rectified facing to moving contact (54), the other end links to each other with live wire on the circuit board through described tripping coil, and contacting with disconnecting of moving contact (54) and resistance (88) constitutes a leakage current analog switch (KR-1) that links with reset button (8);
When earth leakage protective socket was in initial condition, the moving contact (54) on the described elasticity zero-power line input sheet metal (50) contacted leakage current analog switch (KR-1) closure with simulation leakage current current-limiting resistance (88); After earth leakage protective socket resetted, the moving contact (54) on the described elasticity zero-power line input sheet metal (50) disconnected with simulation leakage current current-limiting resistance (88), and leakage current analog switch (KR-1) disconnects;
Connect the back reset button when being in trip status at the power input of earth leakage protective socket and the power line in the wall; power input zero line (WHITE) links to each other with power firestreak (HOT) on the circuit board through leakage current analog switch (KR-1), simulation leakage current current-limiting resistance (88), tripping coil, and formation need not to operate any parts can produce the loop of simulating leakage current automatically.
9. the earth leakage protective socket with life end checking function according to claim 8, it is characterized in that: when reset button was in trip status after the power supply in earth leakage protective socket and wall connected, described leakage current analog switch (KR-1) is in closure state, and the sensitive switch (KR-4) that is made of the electric installation that resets (65-A) is in off-state; In the process that reset button resets, leakage current analog switch (KR-1) becomes the state that leakage current analog switch (KR-1) is opened, sensitive switch (KR-4) is closed from the state of not opening as yet, sensitive switch (KR-4) is closed.
10. the earth leakage protective socket with life end checking function according to claim 9 is characterized in that: the control circuit that is printed on the described circuit board (18) is detected control chip (IC1), the tripping coil (SOL) that is built-in with iron core, controllable silicon (V5), is constituted with the sensitive switch (KR-4) of reset button interlock by the differential differentiating transformer that is used to detect leakage current (L1, L2), leakage current;
Live wire in the earth leakage protective socket supply line, zero line pass differential differentiating transformer, differential differentiating transformer leakage current detection signal output links to each other with the signal input part (2,3,5,4) that leakage current detects control chip (IC1), and the control signal output ends (1) that leakage current detects control chip (IC1) links to each other with the gate pole of controllable silicon (V5); The negative electrode of controllable silicon (V5) links to each other with dc power cathode, and the anode of controllable silicon (V5) links to each other with power firestreak through sensitive switch (KR-4), the tripping coil (SOL) with the reset button interlock; Be built in the tripping coil (SOL) iron core by mechanical trip gear make reset button reset/or thread off, with the switch closure of reset button interlock/or disconnect.
11. the earth leakage protective socket with life end checking function according to claim 10 is characterized in that: on described circuit board (18), be provided with one and be used for representing the whether homing light (V6) of end-of-life of earth leakage protective socket; On middle layer bracket (3), be provided with one and be used for representing whether earth leakage protective socket has the power supply output indicator (V7) of power supply output; Be provided with a light lead pipe (D) of vertically placing above the indicator light at two, the top of this light lead pipe is positioned at indicator lamp hole (30-A) below on loam cake (2) surface;
Described power supply output indicator (V7) is connected in parallel between earth leakage protective socket power output end live wire, the zero line; Described homing light (V6) is connected in the loop that makes described mechanical trip device action.
12. according to claim 11 described earth leakage protective sockets with life end checking function, it is characterized in that: outside the coil of described tripping coil (26), be provided with a coil protect cover (41), respectively be provided with a pair of latch hook (41-A, 41-B) on the end face of coil protect cover, the bottom surface;
The coil protect cover fixes on described circuit board (18) by a pair of latch hook (41-B) that is arranged on the bottom surface; Described output elasticity connects output sheet metal (20,21) does not have an end of moving contact upward closely to contact with power output end (80,81) at coil protective cover (41) by latch hook (41-A) fixing and locking on the coil protect cover end face.
13. according to claim 12 described earth leakage protective sockets with life end checking function; it is characterized in that: the below at described elasticity power supply input sheet metal (50,51) is provided with position-limited block (73,74), and the below that connects output sheet metal (20,21) in described elasticity is provided with position-limited block (43,44).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201031657U CN201018126Y (en) | 2007-01-10 | 2007-01-10 | Creepage protecting socket with service life expiration detecting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201031657U CN201018126Y (en) | 2007-01-10 | 2007-01-10 | Creepage protecting socket with service life expiration detecting function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201018126Y true CN201018126Y (en) | 2008-02-06 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201031657U Expired - Lifetime CN201018126Y (en) | 2007-01-10 | 2007-01-10 | Creepage protecting socket with service life expiration detecting function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201018126Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101222100B (en) * | 2007-01-10 | 2012-01-11 | 黄华道 | Creepage protecting socket with life end checking function |
| CN103969542A (en) * | 2013-12-17 | 2014-08-06 | 成都国蓉科技有限公司 | Socket detector |
| CN103969541A (en) * | 2013-12-17 | 2014-08-06 | 成都国蓉科技有限公司 | Socket detector convenient to store |
| CN105990754A (en) * | 2015-02-10 | 2016-10-05 | 苏州益而益电器制造有限公司 | Leakage protection socket |
| RU2671809C2 (en) * | 2013-07-09 | 2018-11-07 | Шнейдер Электрик Эндюстри Сас | Device for decoding the reset of the switch, the drive of the disconnection mechanism of the switch contactors, electric switch and application of the induced current for generation of running indication signal into the initial position |
| CN110244160A (en) * | 2018-03-09 | 2019-09-17 | 黄家军 | Leakage current detector |
| CN113708153A (en) * | 2021-09-08 | 2021-11-26 | 张贻涛 | High-current plug and socket |
-
2007
- 2007-01-10 CN CNU2007201031657U patent/CN201018126Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101222100B (en) * | 2007-01-10 | 2012-01-11 | 黄华道 | Creepage protecting socket with life end checking function |
| RU2671809C2 (en) * | 2013-07-09 | 2018-11-07 | Шнейдер Электрик Эндюстри Сас | Device for decoding the reset of the switch, the drive of the disconnection mechanism of the switch contactors, electric switch and application of the induced current for generation of running indication signal into the initial position |
| CN103969542A (en) * | 2013-12-17 | 2014-08-06 | 成都国蓉科技有限公司 | Socket detector |
| CN103969541A (en) * | 2013-12-17 | 2014-08-06 | 成都国蓉科技有限公司 | Socket detector convenient to store |
| CN105990754A (en) * | 2015-02-10 | 2016-10-05 | 苏州益而益电器制造有限公司 | Leakage protection socket |
| CN105990754B (en) * | 2015-02-10 | 2018-12-28 | 苏州益而益电器制造有限公司 | Earth leakage protective socket |
| CN110244160A (en) * | 2018-03-09 | 2019-09-17 | 黄家军 | Leakage current detector |
| CN113708153A (en) * | 2021-09-08 | 2021-11-26 | 张贻涛 | High-current plug and socket |
| CN113708153B (en) * | 2021-09-08 | 2024-04-12 | 张贻涛 | High-current plug and socket |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20080206 Effective date of abandoning: 20070110 |