CN2743962Y - Socket type grounding damage line circuit breaker with reverse connecting protection function - Google Patents

Abstract

The utility model relates to a socket-type earthing fault line breaker, for short GFCI. The utility model comprises a resetting key (130), a pair of movable wafers (330, 340), a pair of stationary wafers (200, 210), an electric leakage signal detection circuit and an electromagnetic tripping mechanism controlled by the electric leakage signal detection circuit to act. The utility model is characterized in that the GFCI is also provided with a reversal line connecting protection device, wherein the reversal line connecting protection device comprises a resetting rod (550), a resetting spring (240), a resetting bracket (430), a reversal spring supporting mechanism, the electromagnetic tripping mechanism, a lock catch piece (540) and a contact switch. Under the condition of line connecting error of the reversal line connecting protection device, when the resetting key (130) is pressed, a power supply is input, separated movable contacts (390, 400, 410, 420) and stationary contacts (290, 260) are isolated, and the electric leakage analog signal can not be generated without the action of the electromagnetic tripping mechanism and the resetting of the GFCI. A prompting reaction is performed to an installer, thereby, the correct line connection is guided, and the function of safe protection is performed.

Description

Socket type earth-fault line-breaker with reverse wiring protection function

Technical field: the utility model relates to a kind of earth fault line breaker of female type, abbreviates GFCI as.

Background technology: through the development of two more than ten years, in GFCI manufacturer, be engaged under personnel's such as correlative study, exploitation and test the joint efforts struggle and research of technique, no matter GFCI is on product quality, still in specification requirement and the satisfied requirement of using, all reached higher level, but in actual use, still have some shortcomings, improve waiting.Existing common GFCI comprises pedestal usually; be provided with the loam cake of jack; tripping mechanism; reset key; feeler switch; grounding assembly; power supply input coupling assembling; the load coupling assembling; not only can provide power supply for load by the jack of loam cake; can also be by the load coupling assembling to connecting electric thereon; and two groups of coupling assemblings are closely similar; therefore in installing and using process, occur power line is connected the anti-situation that connects with load through regular meeting; at this moment; GFCI exists the hidden danger that causes the person and property damage because of electric shock with regard to not being to be equipped with creepage protection function and only to be equivalent to a common socket.

The utility model content:

The purpose of this utility model is to provide a kind of simple and reliable for structure for overcoming the deficiencies in the prior art; be easy to the earth fault line breaker with reverse wiring protection function of production and processing; and when wiring error occurring, can point out and guide the user to correct wiring, ensure safety.

The utility model is that the achieve the above object technical solution that adopted is as follows: the socket type earth-fault line-breaker with reverse wiring protection function, comprise reset key, a pair of movable contact spring, the a pair of socket pole piece that has static contact, leakaging signal detecting circuit and be subjected to the control of described leakaging signal detecting circuit and the electromagnetic trip mechanism of action, on movable contact spring and the static contact respectively rivet clasp moving contact and fixed contact are arranged, it is characterized in that: described earth fault line breaker also is provided with the reverse wiring protective device, described reverse wiring protective device comprises release link, back-moving spring, reset cradle, reverse resilient support mechanism and electromagnetic trip mechanism and grip tab, contact-making switch, described release link tail end is fixedlyed connected with reset key, be provided with ring-type snap close draw-in groove near the other end, back-moving spring is set on the release link, the back-moving spring two ends are against respectively on reset key and the center, described reset cradle is a tubular element, bilateral symmetry crosses out trailing arm, described movable contact spring free end is separately positioned on the trailing arm top, described socket type earth-fault line-breaker also is provided with a left side, right output chip, a left side, a right output chip and a left side, right side load wiring mechanism is electrically connected, a described left side, right movable contact spring respectively is provided with paired contact, a left side, right output chip and socket pole piece electrical isolation, a described left side, right output chip respectively is provided with a contact, contact correspondence on described left socket pole piece static contact and the left output chip is arranged on the top of left movable contact spring pair of contact, contact correspondence on described right socket pole piece static contact and the right output chip is arranged on the top of right movable contact spring pair of contact, moving contact and fixed contact and a left side, right output chip contact is relative, release link and reset cradle central through hole are movingly and be inserted in wherein, described reverse resilient support mechanism and release link, the coaxial setting of reset cradle, the elastic force direction is relative with release link to constitute flexible restoring organ to the support of reset cradle formation elastic floating; Described grip tab one end is converted into " U " type, described electromagnetic trip mechanism comprises tripping coil support, tripping coil and dropout iron core and iron core spring, axis and flexible restoring organ axis are perpendicular, described dropout iron core outboard end is provided with boss, the boss root is provided with annular recess, described grip tab " U " shape end is provided with the breach that matches with described annular recess, and described breach is stuck on the annular recess and constitutes interlock with the dropout iron core; Described reset cradle is provided with width and is slightly larger than grip tab, the notch vertical with the reset cradle central shaft, another relative with " U " type end be distolateral to be provided with slightly larger in diameter and to constitute bayonet socket and penetrate in the described notch in the circular hole of release link, and can be under the traction of dropout iron core slide before and after in notch, before and after the displacement of sliding should be able to make bayonet socket and the release link end part aligning and stagger between conversion, described bayonet socket and snap close draw-in groove formation buckle structure; The series arm of described contact-making switch and test resistance is connected across the electric leakage signal simulation branch road that constitutes on two inputs, and contact-making switch is pressed the state closure under reset key.

The contact of described contact-making switch is by the contact moving plate that separates and contact still and form, and described contact moving plate is fixedly installed on the trailing arm or trailing arm of reset cradle, and described contact still is oppositely arranged on and contacts below the moving plate.

Also be arranged with middle springs on the described release link, the middle springs two ends are against respectively on center and the reset cradle.

Described reset cradle lower end fixedly is embedded the metallic support sheet, be fixed with axis and the reverse iron core of the column reset cradle dead in line, vertically downward on the support chip, the guide hole that is provided with diameter and reverse iron core through hole formation movingly of correspondence position under reverse iron core, the outer sheathed counteracting spring follower head of described reverse iron core inserts the reverse resilient support of formation mechanism in the described guide hole.

Described trailing arm upper surface is provided with the die cavity that blind hole constitutes over against the position of movable contact spring, is provided with helical spring in the die cavity movable contact spring is carried out resiliency supported.

When socket type earth-fault line-breaker of the present utility model uses under initial trip status first; if it is accidentally that power input and load wiring termination is anti-; instantly driving the descending contact moving plate of reset cradle by reset key moves down with trailing arm; when making the contact moving plate and contacting the still contact; because moving contact that the input power supply is separated and fixed contact are isolated; can not produce the electric leakage analog signal; electromagnetic trip mechanism is failure to actuate; earth fault line breaker can not reset; setter is played the effect of a prompting; and because a movable contact spring contact and a left side; right output chip and socket pole piece contact separation; a left side; right output chip and socket pole piece are to isolate mutually on electric; can not constitute electrical communication through the movable contact spring contact; external power source is guided to socket; therefore do not have electricity in the socket this moment yet, thereby further guide correct wiring, play the effect of safeguard protection.

The utility model is described in further detail below in conjunction with accompanying drawing.

Description of drawings:

Accompanying drawing 1 is the utility model specific embodiment schematic appearance;

Accompanying drawing 2 is for removing the internal structure schematic diagram behind the loam cake in the accompanying drawing 1;

Accompanying drawing 3 reaches with the perspective view behind the top for removing middle base in the accompanying drawing 2;

Accompanying drawing 4 is in the reset mode cut-away view in the accompanying drawing 1 along the A-A direction

Accompanying drawing 5 is in the trip status cut-away view in the accompanying drawing 1 along the A-A direction;

Accompanying drawing 6 in the accompanying drawing 1 along the B-B direction and be in the cut-away view of trip status;

Accompanying drawing 7 is pressed along B-B direction and reset key in the accompanying drawing 1, the iron core that resets contact grip tab upper supernatant phase cross-sectional schematic;

Accompanying drawing 8 in the accompanying drawing 1 along B-B in the other direction and be in the reset mode cutaway view;

Accompanying drawing 9 in the accompanying drawing 1 along the B-B direction and be in the cut-away view of reset mode;

Accompanying drawing 10 in the accompanying drawing 1 along the C-C direction feeler switch state cutaway view that is not depressed;

Accompanying drawing 11 in the accompanying drawing 1 along the C-C direction feeler switch state cutaway view that is depressed;

Accompanying drawing 12 is the view after accompanying drawing 3 is removed base;

Accompanying drawing 13 is accompanying drawing 12 left views;

Accompanying drawing 14 is the three-dimensional exploded view of accompanying drawing 12;

Accompanying drawing 15 is the utility model specific embodiment three-dimensional exploded view;

Accompanying drawing 16 is the electronic circuit schematic diagram of the utility model specific embodiment.

Embodiment:

Shown in Fig. 1～4, the whole rectangular body of GFCI socket, housing is divided into pedestal 150 and 120 liang of parts of loam cake, be provided with center 190 at pedestal 150 and loam cake 120, loam cake 120 is provided with two groups of socket apertures 160 and 130 1 feeler switchs 140 of a reset key, the L shaped copper contact chip 230 that feeler switch 140 belows are provided with, in pedestal 150 inner chambers, a substrate 440 of being made by printed wire is set, electromagnetic trip mechanism arranges along the length direction of socket and is fixedly mounted on substrate 440 back sides, tripping coil frame in the electromagnetic trip mechanism is horizontally fixed on the substrate 440 behind last tripping coil 520, the tripping coil frame is provided with U-shaped pure iron sheet 530 towards substrate 440 edges one end, U-shaped pure iron sheet 530 is clipped in outside the tripping coil frame, dropout iron core 500 sheathed upper core springs 510 backs are inserted in the tripping coil frame central shaft hole slidably from the other end, iron core spring 510 also can be arranged on the medial extremity of dropout iron core 500 in the tripping coil frame central shaft hole, the medial extremity of dropout iron core 500 is provided with boss, iron core spring 510 positioning sleeves are located on this boss, iron core 500 reliably workings so more help threading off, dropout iron core 500 outboard ends are provided with boss, and be provided with annular recess at the boss root, grip tab 540 is made by the strip stainless steel substrates, one end offers the breach that matches with described annular recess, and be bent into " U " shape and make it have better elasticity, described breach is stuck in and constitutes interlock on the described annular recess, described breach can be any shape that matches with annular recess, but with " U " shape is good, also can be provided with collar flange on dropout iron core 500 segmentum laterales to do rationally spacing to dropout iron core 500 operating distances; Test coil 450 in the electric-leakage detection circuit and neutral coil 460 are stacked and placed in the cylindric magnet ring seat, be provided with annular gasket between test coil 450 and the neutral coil 460, other electron component is fixedly mounted on equally on the substrate 440 and by the printed wiring on it is corresponding with the magnet ring seat and is connected in the electric-leakage detection circuit, position between electromagnetic trip coil 520 and the magnet ring seat is provided with the resetting means seat, reset key 130 over against the top, release link 550 tail ends are fixedlyed connected with reset key 130, be provided with ring-type snap close draw-in groove near the other end, reset cradle 430 is a tubular element, in this concrete enforcement is square, reset cradle 430 places resetting means seat center, reset cradle 430 two opposite sides symmetric transverse are stretched out a pair of trailing arm 282,284, sheathed back-moving spring 240 and middle springs 220 on the release link 550, back-moving spring 240 two ends are against respectively on reset key 130 and the center 190, middle springs 220 two ends are against respectively on center 190 and the reset cradle 430, the setting of middle springs 220 is for switching mechanism contact contact force poised state is adjusted, release link 550 and reset cradle 430 central through holes are movingly and be inserted in wherein, reset cradle 430 lower ends fixedly are embedded metallic support sheet 490, be fixed with the reverse iron core 480 of column vertically downward on the support chip 490, the substrate 440 of correspondence position is provided with the guide hole of diameter and reverse iron core 480 through hole formation movingly under the reverse iron core 480, described reverse iron core 480 outer sheathed counteracting spring 470 follower heads insert the reverse resilient support of formation mechanism in the described guide hole, described reverse resilient support mechanism and release link 550, reset cradle 430 coaxial settings, the elastic force direction constitutes elastic floating with release link 550 relative formation flexible restoring organs to reset cradle 430 and supports, make reset cradle 430 under the guiding of described guide hole and release link 550, can in certain scope, move axially, socket pole piece 201,211 be embedded in the slot of pedestal 150 both sides fixing, and extend to socket aperture 160 times, static contact 200 is stretched out to the centre in its middle part, 210 to trailing arm 282,284 side top, static contact 200, on 210 respectively rivet clasp fixed contact 290 is arranged, 260, movable contact spring 330,340 are converted into " L " shape, one end penetrates on the magnet ring center is inserted at the bottom of pedestal 150 chambeies admittedly, another free end is "T"-shaped, rivet clasp has a pair of moving contact 400 respectively, 390,420,410, free end places trailing arm 282 respectively, 284 with static contact 200, between 210, can also be at trailing arm 282,284 upper surfaces are over against movable contact spring 330,340 position is provided with the die cavity that blind hole constitutes, be provided with helical spring 620 in the die cavity, 630, to movable contact spring 330,340 carry out resiliency supported, at helical spring 620,630 end can also add end cap, more help secure support, the socket type earth-fault line-breaker also is provided with a left side, right output chip 350,360, a left side, right output chip 350,360 with left, right side load wiring mechanism is electrically connected, a left side, right output chip 350,360 with socket pole piece 201,211 electrical isolation, a described left side, right output chip 350,360 respectively are provided with a contact 280,270, contact 290 on described left socket pole piece 201 static contacts and the left output chip 350,280 correspondences are arranged on left movable contact spring 330 pair of contact 400,390 top, contact 260 on described right socket pole piece 211 static contacts and the right output chip 360,270 correspondences are arranged on right movable contact spring 340 pair of contact 420,410 top, moving contact 390,400,410,420 and fixed contact 290,260 and left, right output chip 350,360 contacts 280,270 is relative, contact 280,270 and fixed contact 290,260 should be synchronously and moving contact 390,410,400,420 contacts or separation; The contact of contact-making switch by the contact moving plate 570 that separates with contact still 600 and form, described contact moving plate 570 is fixedly installed on the trailing arm 282 or trailing arm 284 of reset cradle 430, can adopt draw-in groove clamping or riveted joint, described contact still 600 is oppositely arranged on contact moving plate 570 belows, be arranged in the present embodiment on the trailing arm 282 of left side, can certainly be arranged on the right side, described contact moving plate 570 is electrically connected with test resistance, makes test resistance, series arm two tip nodes that contact-making switch is formed are connected across respectively between two power lines of power input LINE side of movable contact spring and constitute electric leakage signal simulation branch road; Yoke 110 geometrical clamps are installed between pedestal 150 and loam cake 120,150 of loam cake 120 and pedestals are linked into an integrated entity by the screw that is arranged on four jiaos.

Below the utility model leakaging signal detecting circuit is described:

As shown in figure 16, diode D1-D4 and resistance R 3, capacitor C 3 constitutes rectification and filter circuit provides DC power supply for control circuit, it exchanges end and is connected with power input LINE, electromagnetic trip coil 520 1 ends are connected with one of input power cord, the other end is connected to the controllable silicon SCR positive pole and is connected with another input power cord with rectifier bridge through controllable silicon SCR, the controllable silicon SCR negative pole is connected with the direct current negative pole, the electric leakage signal amplifying circuit is selected the RV4145 integrated circuit for use, article two, power line all passes test magnetic ring coil and neutral magnetic ring coil, the output of test magnetic ring coil and neutral magnetic ring coil all is connected to electric leakage signal and amplifies on the integrated RV4145, electric leakage signal amplifies the control output end of integrated RV4145 and passes through the trigger electrode that resistance R 5 is connected to controllable silicon SCR, for improving interference free performance, prevent false triggering, between the trigger electrode of controllable silicon SCR and negative pole in parallel on anti-interference capacitor C5.

To be described in further detail the course of work of the present utility model below:

Shown in Fig. 5～8, female type GFCI is under trip status, be in of the return action of the counteracting spring 470 of compressive state because of elastic force, thereby promoting reset cradle 430 moves upward, cause being placed on the left movable contact spring 330 that has the contact above the reset cradle 430, right movable contact spring 340 moves together, make contact moving plate 570 and contact still 600 and be separated, that is to say, GFCI is under trip status, counteracting spring 470 affranchise state elastic force with a left side, right movable contact spring 330, when 340 reclinate elastic force reach identical, contact moving plate 570 with contact still 600 and be in off-state.

In wiring correct following time of situation, press reset key 130, make down by the elastic force of making every effort to overcome clothes back-moving spring 240, because release link 550 adds the injection moulding in man-hour in one in reset key 130, so release link 550 also can and then move downward.Because the centre bore of reset cradle 430 and the bayonet socket 545 of grip tab 540 stagger fully, so the termination of release link 550 withstands on the upper surface of grip tab 540, having driven reset cradle 430 moves downward with grip tab 540, then compress counteracting spring 470, at this moment, contact moving plate 570 also moves downward thereupon, until contacting moving plate 570 and contacting still 600 contacts, and because contact moving plate 570 is to contact with the lead-in wire of an end lead of test resistance, in such cases, just be equivalent to by a feeler switch 140, produced an electric leakage analog signal, cause tripping coil 520 charged work, make dropout iron core 500 actions in the tripping coil 520.The action force of dropout iron core 500 just overcomes the frictional force between release link 550 tops and grip tab 540 surfaces and the elastic force of iron core spring 510, because the neck of dropout iron core 500 is to be stuck in the bayonet socket 545 of grip tab 540, so dropout iron core 500 moves with regard to pulling grip tab 540, is in concentric position until the centre bore of reset cradle 430 and the bayonet socket 545 of grip tab 540; At this moment, reset key 130 promotes the bayonet socket 545 that release link 550 is passed grip tab 540, simultaneously, counteracting spring 470 fully stretches, overcome a left side, right movable contact spring 330,340 self the crooked elastic-restoring force that produce and the elastic force of middle springs 220, promote a reset cradle 430 and a left side, right movable contact spring 330,340 with the contact still 600 and the contact moving plate 570 move upward, make contact moving plate 570 and contact still 600 and be separated, so, electric leakage signal disappears thereupon, tripping coil 520 is not charged, also stop motion of dropout iron core 500, iron core spring 510 promote grip tab 540 and move together under the effect of elastic-restoring force, make bayonet socket 545 dislocation of reset cradle 430 centre bores and grip tab 540, cause bayonet socket 545 on the grip tab 540 to block the ring-type snap close draw-in groove place of release link 550.After eliminating by power under the adding of reset key 130, back-moving spring 240 overcomes a left side, the elastic-restoring force of self bending of right movable contact spring and middle springs 220 are compressed the back and the elastic-restoring force that produces drives reset cradle 430 and moves upward together, a because left side, right movable contact spring 330,340 arm places reset cradle 430 left sides respectively, the trailing arm 282 of right two ends, on 284, so, a left side, right movable contact spring 330,340 also move upward together, until a left side, right movable contact spring 330, contact on 340 arms and a left side, right output chip 350,360 contact 280,270 and static contact 210, fixed contact 290 on 200,260 synchronous and moving contacts 390,410,400,420 contact, the input power supply is through a left side, right movable contact spring 330,340, static contact 210,200 provide power supply for socket, simultaneously through a left side, right output chip 350,360 for load wiring mechanism provides power supply, has realized resetting of GFCI.

As Fig. 9, shown in 10, after pressing feeler switch 140, L shaped contact chip 230 under it is contacted with test resistance 320 1 end conductor leadings, or the existence of leakage current arranged in the circuit of GFCI place, this electric leakage signal will amplify by the leakaging signal detecting circuit of GFCI inside, triggering controllable silicon SCR makes tripping coil 520 charged and in running order, 500 actions of dropout iron core, make the bayonet socket 545 of reset cradle 430 centre bores and grip tab 540 be in concentric position, the release link 550 of pinning is released, reset key 130 and release link 550 move upward under the elastic-restoring force effect of back-moving spring 240, get back to the initial position under the trip status.After release link 550 is released, reset cradle 430 is under the acting in conjunction of the elastic force of middle springs 220 and left and right movable contact spring 330,340 elastic-restoring forces, move downward, converge and be in poised state until elastic force with counteracting spring 470, and this moment, fixed contact 290,260 on contact 390,400,410,420 on the left and right movable contact spring 330,340 and the contact 280,270 of left and right output chip 350,360 and the static contact 210,200 is in phase-separated state, thereby has realized the dropout of GFCI.

In the following time of situation of wiring error; after pressing reset key 130; left and right movable contact spring and reset cradle 430 are along with grip tab 540 moves downward together; contact moving plate 570 also moves downward thereupon; until contact moving plate 570 with contact still 600 and contact; but this moment is because separated moving contact 390,400,410,420 and fixed contact 290,260 isolation of input power supply; electric leakage signal simulation branch road can not produce the electric leakage analog signal; electromagnetic trip mechanism is failure to actuate, and the reverse wiring protective device can not reset GFCI.Because the centre bore of reset cradle 430 and the bayonet socket 545 of grip tab 540 still are in the dislocation state, so release link 550 can not be blocked by grip tab 540, after the external power that imposes on reset key 130 is removed, reset key 130 and release link 550 move upward under the elastic-restoring force effect of back-moving spring 240, get back to the initial position under the trip status.The elastic force of counteracting spring 470 overcomes the elastic force and the crooked elastic-restoring force that produces of left and right movable contact spring of middle springs 220, promote reset cradle 430 and spur grip tab 540 to move upward together, also promoting left and right movable contact spring 330,340 moves upward together, until the balance that reaches upper and lower strength, but the contact 390,400,410,420 on the movable contact spring 330,340 can not contact with the contact 290,260 on the static contact 200,210 at this moment, and reset key 130 still is in the situation under the trip status.

Though the GFCI with 20A of the present utility model is that example illustrates, but socket part for the GFCI of 15A, and have an indicating lamp structure, its operation principle all is the same, for 15A, only the inserted sheet shape has in difference, for having indicating lamp structure, and the closed-loop path that electronic components such as many LED, resistance, diode form in the electronic circuit only.So in this no longer repeat specification.

Claims (7)

1, a kind of socket type earth-fault line-breaker with reverse wiring protection function, comprise reset key (130), a pair of movable contact spring (330,340), the a pair of static contact (200 that has, 210) socket pole piece (201,211), leakaging signal detecting circuit and be subjected to the control of described leakaging signal detecting circuit and the electromagnetic trip mechanism of action, movable contact spring (330,340) and static contact (210,200) on respectively rivet clasp moving contact (390 is arranged, 400,410,420) and fixed contact (290,260), it is characterized in that: described earth fault line breaker also is provided with the reverse wiring protective device, described reverse wiring protective device comprises release link (550), back-moving spring (240), reset cradle (430), reverse resilient support mechanism and electromagnetic trip mechanism and grip tab (540), contact-making switch, described release link (550) tail end is fixedlyed connected with reset key (130), be provided with ring-type snap close draw-in groove near the other end, back-moving spring (240) is set on the release link (550), back-moving spring (240) two ends are against respectively on reset key (130) and the center (190), described reset cradle (430) is a tubular element, bilateral symmetry crosses out trailing arm (282,284), described movable contact spring (330,340) free end is separately positioned on trailing arm (282,284) top, described socket type earth-fault line-breaker also is provided with a left side, right output chip (350,360), a left side, right output chip (350,360) with a left side, right side load wiring mechanism is electrically connected, a described left side, right movable contact spring (330,340) respectively be provided with paired contact (390,400,410,420), a left side, right output chip (350,360) with socket pole piece (201,211) electrical isolation, a described left side, right output chip (350,360) respectively be provided with a contact (280,270), contact (290 on described left socket pole piece (201) static contact and the left output chip (350), 280) correspondence is arranged on left movable contact spring (330) pair of contact (400,390) top, contact (260 on described right socket pole piece (211) static contact and the right output chip (360), 270) correspondence is arranged on right movable contact spring (340) pair of contact (420,410) top, moving contact (400,390,420,410) and fixed contact (290,260) and a left side, right output chip (350,360) contact (280,270) relative, release link (550) and reset cradle (430) central through hole are movingly and be inserted in wherein, described reverse resilient support mechanism and release link (550), the coaxial setting of reset cradle (430), the elastic force direction is relative with release link (550) to constitute flexible restoring organ to the support of reset cradle (430) formation elastic floating; Described grip tab (540) one ends are converted into " U " type, described electromagnetic trip mechanism comprises tripping coil support, tripping coil (520) and dropout iron core (500) and iron core spring (510), axis and flexible restoring organ axis are perpendicular, described dropout iron core (500) outboard end is provided with boss, the boss root is provided with annular recess, described grip tab (540) " U " shape end is provided with the breach that matches with described annular recess, and described breach is stuck on the annular recess and constitutes interlock with dropout iron core (500); Described reset cradle (430) be provided with width be slightly larger than grip tab (540), with the vertical notch of reset cradle (430) central shaft, another relative with " U " type end be distolateral to be provided with slightly larger in diameter and to constitute bayonet socket (545) and penetrate in the described notch in the circular hole of release link (550), and can be under the traction of dropout iron core (500) slide before and after in notch, before and after the displacement of sliding should be able to make bayonet socket (545) and release link (550) end part aligning and stagger between conversion, described bayonet socket (545) forms buckle structure with the snap close draw-in groove; The series arm of described contact-making switch and test resistance is connected across the electric leakage signal simulation branch road that constitutes on two inputs, and contact-making switch is pressed the state closure down in reset key (130).

2, the socket type earth-fault line-breaker with reverse wiring protection function according to claim 1; it is characterized in that: the contact of described contact-making switch by the contact moving plate (570) that separates with contact still (600) and form; described contact moving plate (570) is fixedly installed on the trailing arm (282) or trailing arm (284) of reset cradle (430), and described contact still (600) is oppositely arranged on contact moving plate (570) below.

3, the socket type earth-fault line-breaker with reverse wiring protection function according to claim 1; it is characterized in that: also be arranged with middle springs (220) on the described release link (550), middle springs 220 two ends are against respectively on center 190 and the reset cradle 430.

4; socket type earth-fault line-breaker according to claim 1 or 2 or 3 with reverse wiring protection function; it is characterized in that: described reset cradle (430) lower end fixedly is embedded metallic support sheet (490); be fixed with axis and reset cradle (430) dead in line on the support chip (490); the reverse iron core of column vertically downward (480); the guide hole that is provided with diameter and reverse iron core (480) through hole formation movingly of correspondence position under reverse iron core (480), outer sheathed counteracting spring (470) follower head of described reverse iron core (480) inserts the reverse resilient support of formation mechanism in the described guide hole.

5, according to claim 1 or 2 or 3 described socket type earth-fault line-breakers with reverse wiring protection function; it is characterized in that: described trailing arm (282,284) upper surface is provided with the die cavity that blind hole constitutes over against the position of movable contact spring (330,340), is provided with helical spring (620,630) in the die cavity movable contact spring (330,340) is carried out resiliency supported.

6, the socket type earth-fault line-breaker of stating according to claim 4 with reverse wiring protection function; it is characterized in that: described trailing arm (282,284) upper surface is provided with the die cavity that blind hole constitutes over against the position of movable contact spring (330,340), is provided with helical spring (620,630) in the die cavity movable contact spring (330,340) is carried out resiliency supported.

7, the socket type earth-fault line-breaker of stating according to claim 5 with reverse wiring protection function; it is characterized in that: described trailing arm (282,284) upper surface is provided with the die cavity that blind hole constitutes over against the position of movable contact spring (330,340), is provided with helical spring (620,630) in the die cavity movable contact spring (330,340) is carried out resiliency supported.

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