CN206742180U - A kind of mini-type residual current actuated breaker - Google Patents

Abstract

The utility model discloses a kind of mini-type residual current actuated breaker; number of poles is the two poles of the earth; it is made up of the electric leakage trip unit of one-piece integrated structure with breaker unit; wherein intermediate base is using power end and load end two-part structure; the two poles of the earth main circuit is respectively provided with short circuit, overload and creepage protection function; and separate instruction device is set, it does not interfere with each other；Electric leakage release lever is slided by gib block in housing guide groove, and arc initiation device innovates arc-striking structure using equidistant cambered plate in bending two sides etc..A kind of mini-type residual current actuated breaker provided by the utility model; with compact, it is compact-sized it is succinct rationally, be easy to industrialize automated production assembling; working condition instruction is clear accurately, job stability and reliability are higher, strong breaking capacity, service life length, dual loop are protected, and more comprehensively more pacifies.

Description

A kind of mini-type residual current actuated breaker

Technical field

Low-voltage electrical technical field is the utility model is related to, specifically a kind of mini-type residual current actuated breaker.

Background technology

Residual current action breaker is that the function of detection residual current and the function of disconnection main circuit are combined, Circuit can also be overloaded and a kind of breaker of multifunctional usage of short-circuit protection simultaneously, its basic functional principle：Electric leakage Detecting element（Residual current transformer）There is an annular core, secondary coil is wound with iron core, primary coil is exactly through iron The wire in in-core hole.In normal electricity consumption, if three-phase electricity consumption is balance, its three-phase current caused magnetic field in transformer Just offset, be at this moment no electric current on zero line, even if three-phase electricity consumption is uneven, flow through three-phase line out-of-balance current and Electric current on zero line or equal in magnitude, in the opposite direction, i.e. each wire phasor of residual current transformer primary coil and be zero, this Pressure-sensitive electromotive force is zero in magnetic flux and secondary coil in Shi Tiexin, and electric shock accidents or uneven leakage occur in by protection circuit When electric, each current in wire phasor sum is not zero in primary coil, and this electric current is exactly residual current, and residual current produces in the core Raw alternating flux, induces electromotive force in secondary coil, when electric current is amplified to action current setting valve through amplifier, electrical apparatus release Action makes main switch in time rating internal cutting off power supply, protection personal safety.

Domestic traditional residual current action breaker typically uses multistage combined structure at present, and each of which level is whole Body formula structure, residual current element, residual current trip gear and switching device are had a style of one's own, and independently of each other, and inside is led Line connection is use terminal screw mode, and product structure is complicated, and parts are more, bulky, produce Assembly stability with it is consistent Property is not high, and job stability and reliability are not good enough；In addition, traditional residual current action breaker product only has L at present Pole band overload and short-circuit protection function, N poles are then using leading directly to or can be opened and closed neutral pole design, with domestic city and rural area low pressure The fast development of power network, no matter traditional residual current action breaker apparent size and properties of product can not expire very well The new change continued to develop enough, it would be highly desirable to compact, reasonable, job stability simple for structure and reliability height are developed, and just In the high performance mini residual current action breaker of the automatic production assembling of industrialization.

The content of the invention

The purpose of this utility model is to be directed to above-mentioned the deficiencies in the prior art, there is provided a kind of mini-type residual current actuated disconnected Road device, with compact, reasonable, job stability simple for structure and reliability are high, it is clear accurate to indicate, and are easy to industrialize Automatic production assembling.

Realizing the technical solution of the utility model is：A kind of mini-type residual current actuated breaker, number of poles is the two poles of the earth, by leaking Electric trip unit forms with breaker unit, wherein electric leakage trip unit uses one-piece integrated structure, shell with breaker unit Body is made up of base, intermediate base and cover plate；The two poles of the earth main circuit is respectively provided with short circuit, overload and creepage protection function, and sets phase Mutually independent instruction device, does not interfere with each other, and Judging fault is clear, accurate；The release lever of electric leakage trip unit is existed by gib block Slided in housing guide groove, and then drive electrical leakage tripping device action；Wherein the arc initiation device of arc quenching system uses bending two sides The structures such as equidistant run-on tab, S-shaped moving contact, arc static contact, magnetic conduction arc plate, magnetic conduction arc angle, arc separating wall and magnetic conduction sheet, striking The arc extinguishing speed fast time is short, will not carry out larger ablation to contact, bright to cut-out high-current circuit or short circuit breaking capacity effect It is aobvious.

In above-mentioned technical proposal, wherein electric leakage trip unit uses one-piece integrated structure, load end with breaker unit The trip unit that leaks electricity includes electrical leakage tripping device, leakage tripping device, electric sub-member plate, release lever, zero sequence current mutual inductor etc., keeps away The connection of traditional product single-stage combining structure inner lead is exempted from by the way of terminal screw, simple processing is easy to operate, can be effective Reduce contact resistance, reduce product temperature rise, effectively increase cooperation reliability and extend product service life.

In above-mentioned technical proposal, its center base and cover plate are structure as a whole, intermediate base using intermediate base power end and The two-section separated structure of intermediate base load end, it is easy to processing and Automated assembly, two sections of inwalls to correspond under magnetic release Square center respectively sets a bar shaped guide groove for waiting depth communicated, is oriented to groove depth 0.8mm to 1.2mm, free as release lever The sliding groove of slip.

In above-mentioned technical proposal, breaker L poles, N are extremely with overload short circuit error protection indication window, in addition, lengthening Load end electric leakage trip unit one end of design, is provided with SR, back-moving spring, indication piece and electric leakage indication window, can With state accurate, that clearly independent display indication reset is closed a floodgate and electric leakage is opened a sluice gate, two kinds of protections are independently indicated, not done mutually Disturb, Judging fault is apparent, accurate.

In above-mentioned technical proposal, wherein indication piece is made up of axle sleeve, indicator board and driver plate, and axle sleeve is arranged on consolidating for housing On dead axle, axle sleeve is cylindrical structure, and axle sleeve top is connected with wedge indicator board, indicator board upper surface by arc reset index plane Being formed with separating brake index plane, indicator board lower surface is a horizontal locating surface, in "on" position with leaking electricity under gate-dividing state, when Indication piece is in contact with SR plays locking positioning action, is fixedly linked below axle sleeve with a rectangle driver plate, is driven It is push rod driving face, release lever driving face respectively at left and right sides of plate.

In above-mentioned technical proposal, wherein SR is made up of button body and latch, and wherein button body is one Square structure, in the body bottom be connected with a square latch, latch is rectangular aperture slot structure, wherein open slot Upper surface is that to reset locking surface, the facade of open slot be separating brake locking surface, during breaker closing, presses SR, now refers to Show that the locating surface of part positions with the reset locking surface phase locking of SR, indication piece resets index plane positioned at electric leakage instruction Beneath window, electric leakage instruction are shown as white；When having leakage current in circuit and reaching electric leakage set action value, electric leakage point Lock, SR are upspring, and the locating surface of indication piece positions with the separating brake locking surface phase locking of SR, and the separating brake of indication piece refers to Show beneath window of the face positioned at electric leakage instruction, electric leakage instruction is shown in red, and it is that the protection of circuit leak current fault is jumped to represent breaker Lock.

In above-mentioned technical proposal, wherein release lever designs in big " u "-shaped, and at " u "-shaped both ends, bending part respectively sets one Angle, play a part of strengthening intensity, release lever bottom rear sets two gib blocks along two sides, can effectively reduce dropout Frictional force of the bar in guide groove slidably, release lever are located at the lower section of magnetic release, and release lever is with magnetic release in open circuit Without interference effect under overload short circuit and earth leakage protective state under device normal operation.

In above-mentioned technical proposal, the run-on tab of arc quenching system adds extension bending design using arcwall face, extends bending circular arc 2.5-3.5mm distance is kept after installation between moving contact, bending two sides is similar to two equidistant cambered plates, run-on tab bending lower section Arcuately face sets a raised striking muscle, and the muscle extends to electric arc into arc-chutes segmentation end, another tail end and conducting system It is weldingly connected；Wherein moving contact is designed using S-shaped, is provided with a long arc shape arc leading angle in contactor end, is prevented ablation contact and have Beneficial to striking；A magnetic conduction arc plate and magnetic conduction arc angle are set with each inside static contact below run-on tab, striking plate top surface is provided with one Magnetic conduction sheet, static contact bottom surface are provided with an arc separating wall, and magnetic conduction sheet is arranged on below arc separating wall, play a part of producing magnetic.

In above-mentioned technical proposal, an independent leakage switch is set on base, in that context it may be convenient to realizes earth leakage protective Opening and closing, meet the different use function needs of user.

In above-mentioned technical proposal, a test button is set on intermediate base, in normal operation of circuit breaker, presses examination Button is tested, breaker will repeat the path of motion after leakage current value reaches predetermined protection value, periodic detection product earth leakage protective Function.

In above-mentioned technical proposal, a hand tripping pressing plate is provided with electrical leakage tripping device, by quick on cover plate Dropout window can realize manual internal dropout separating brake during testing experiment, be taken off at manual automatically jumping, thread off reset and the two poles of the earth slowly Used when detaining linkage test.

The utility model has following technique effect：Electric leakage trip unit is integrally tied with breaker unit using integral type Structure, load end extension design, arrangement and connection more compact and reasonable between each functional part, small volume, the space of occupancy is small, The development need of electrical equipment miniaturization can more preferably be met；Intermediate base housing uses intermediate base power end and intermediate base load end Two-section separated structure, be easy to processing and Automated assembly；In tripping system, by release lever, electric leakage indication piece, reset and press The innovation of button is set, and is not only concise in structure, and using dropout mode is slided, is threaded off faster more steady, will not be malfunctioned；It is disconnected Road device L poles, N poles the two poles of the earth are respectively provided with short circuit, overload and creepage protection function, and dual loop protection is more comprehensively safer；And adopt With independent non-interfering main circuit indication window and electric leakage indication window so that the working condition instruction of breaker is more accurate Really, it is clear, very clear；The run-on tab of arc quenching system uses the cambered surface bending structure of both ends extension, and run-on tab bottom sets and led Magnetic arc plate, using serpentine moving contact, magnetic conduction arc angle, the top surface and bottom surface of run-on tab and static contact are set inside arc static contact Arc separating wall and magnetic conduction sheet are set respectively, and each functional part is simple for structure rationally, and process and assemble is convenient firm, the striking of arc quenching system Arc extinguishing speed is fast, the time is short, and larger ablation will not be caused to contact, bright to cut-out high-current circuit or short circuit breaking capacity effect It is aobvious, electric arc magnetic blow-out and air-blowing efficiency high, significantly improve product short circuit breaking capacity and service life；Independent earth leakage protective is set Switch, can start or stop creepage protection function as needed；Test button is set, in that context it may be convenient to detects product earth leakage protective work( Energy；Hand tripping pressing plate is set, can more preferably meet manual automatically jumping, slow reset and dropout linkage test in the two poles of the earth makes of threading off With needs.

Brief description of the drawings

Fig. 1 the utility model embodiment mini-type residual current actuated breaker dimensional structure diagrams.

Fig. 2 the utility model embodiment mini-type residual current actuated breaker explosive views.

The two-section separated structural representation of intermediate base of Fig. 3 the utility model embodiments.

Indication piece in indication piece structural representation Fig. 1, Fig. 5 the utility model embodiments in Fig. 4 the utility model embodiments Structural representation Fig. 2.

Reset button structure schematic diagram in Fig. 6 the utility model embodiments.

SR and indication piece gate-dividing state structural representation in Fig. 7 the utility model embodiments.

Release lever and magnetic release position view in Fig. 8 the utility model embodiments.

Gate-dividing state partial structural diagram in Fig. 9 the utility model embodiments.

Electric leakage trip unit partial structural diagram in Figure 10 the utility model embodiments.

1 electrical leakage tripping device, 11 hand tripping pressing plates, 2 leakage tripping devices, 3 electric sub-member plates, 4 release levers, 41 in figure Gib block, 5 zero sequence current mutual inductors, 6 indication pieces, 61 axle sleeves, 62 indicator boards, 6211 reset index planes, 6212 separating brake index planes, 622 locating surfaces, 63 driver plates, 631 push rod driving faces, 632 dropout driving faces, 7 SRs, 8 leakage switch, 9 test buttons, 10 housings, 101 bases, 102 intermediate bases, 1021 intermediate base power ends, 1022 intermediate base load ends, 1023 guide grooves, 103 cover plates, 111 L poles indication windows, 112 N poles indication windows, 12 electric leakage indication windows, 13 rapid-releasing windows, 15 magnetic are threaded off Device, 16 moving contacts, 161 arc leading angles, 17 static contacts, 18 run-on tabs, 181 striking muscle, 19 magnetic conduction arc plates, 20 magnetic conduction arc angles, 21 are led Magnetic sheet, 22 arc separating walls.

Embodiment

A kind of mini-type residual current actuated breaker that the utility model embodiment provides, as shown in Figure 1 and Figure 2, breaker Number of poles is the two poles of the earth, is made up of electric leakage trip unit with breaker unit, wherein electric leakage trip unit uses one with breaker unit Body formula overall structure, housing 10 are made up of base 101, intermediate base 102 and cover plate 103；The two poles of the earth main circuit is respectively provided with short circuit, mistake Load and creepage protection function, and separate instruction device is set, it does not interfere with each other, Judging fault is clear, accurate；Electric leakage is threaded off The release lever 4 of unit is slided by gib block 41 in the guide groove 1023 of housing 10, and then drives electrical leakage tripping device 1 dynamic Make；As shown in figure 9, wherein arc initiation device using the equidistant run-on tab 18 in bending two sides, S-shaped moving contact 16, arc static contact 17, Magnetic conduction arc plate 19, magnetic conduction arc angle 20, arc separating wall 22 and magnetic conduction sheet 21, the arc leading and suppressing speed fast time is short, and contact will not be carried out Larger ablation, to cut-out high-current circuit or short circuit breaking capacity positive effect.

As shown in Fig. 2 in the utility model embodiment, wherein electric leakage trip unit is whole using integral type with breaker unit Body structure, load end electric leakage trip unit include electrical leakage tripping device 1, leakage tripping device 2, electric sub-member plate 3, release lever 4, zero Sequence current transformer 5 etc., the connection of traditional product single-stage combining structure inner lead is avoided by the way of terminal screw, processing It is simple and easy to operate, contact resistance can be effectively reduced, reduces product temperature rise, effectively increasing to coordinate reliability and extend product makes Use the life-span.

As shown in Figure 1, Figure 2 and Figure 3, in the utility model embodiment, its center base 101 and cover plate 103 are structure as a whole, Intermediate base 102 is easy to add using the two-section separated structure of intermediate base power end 1021 and intermediate base load end 1022 Work and Automated assembly, two sections of inwalls correspond to magnetic release 15 lower central position respectively set one communicate wait deep bar shaped to lead To groove 1023,1023 deep 1.0mm of guide groove, the sliding groove as release lever 4 slidably.

In the utility model embodiment, extremely with overload short circuit error protection indication window, i.e. L poles refer to by breaker L poles, N Show window 111 and N poles indication window 112, in addition, in load end electric leakage trip unit one end of extension design, be provided with reset Button 7, indication piece 6 and electric leakage indication window 12, it accurately, clearly can independently show that indication reset closes a floodgate what is opened a sluice gate with electric leakage State, two kinds of protections are independently indicated, not interfere with each other that Judging fault is apparent, accurate.

As shown in Figure 4, Figure 5, in the utility model embodiment, wherein indication piece 6 is by axle sleeve 61, indicator board 62 and driver plate 63 are formed, and axle sleeve 61 is arranged in the fixing axle of housing 1, and axle sleeve 61 is cylindrical structure, the top of axle sleeve 61 and wedge indicator board 62 It is connected, the upper surface of indicator board 62 is made up of the reset index plane 6211 and separating brake index plane 6212 of arc, the lower surface of indicator board 62 It is a horizontal locating surface 622, in "on" position with leaking electricity under gate-dividing state, when indication piece 6 has been in contact with SR 7 To locking positioning action, the lower section of axle sleeve 61 and a rectangle driver plate 63 are fixedly linked, and the left and right sides of driver plate 63 is top respectively Bar driving face 631, release lever driving face 632.

As shown in Figure 7, Figure 8, in the utility model embodiment, wherein SR 7 is by button body 71 and latch 72 Composition, wherein button body 71 is a square structure, and bottom is connected with a square latch 72 in the body, latch 72 For rectangular aperture slot structure, the upper surface of wherein open slot be reset locking surface 721, the facade of open slot is separating brake locking surface 722, during breaker closing, SR 7 is pressed, now the reset locking surface of the locating surface 622 of indication piece and SR 7 721 phase lockings position, and the reset index plane 6211 of indication piece 6 is shown as white positioned at the lower section of electric leakage indication window 12, electric leakage instruction Color；When having leakage current in circuit and reaching electric leakage set action value, leaked electricity separating brake, and SR 7 is upspring, indication piece 6 The phase locking of separating brake locking surface 722 of locating surface 622 and SR 7 positions, and the separating brake index plane 6212 of indication piece 6 is positioned at electric leakage The lower section of indication window 12, electric leakage instruction is shown in red, and expression breaker is circuit leak current fault trip protection.

As shown in figure 9, in the utility model embodiment, wherein release lever 4 designs in big " u "-shaped, in the bending of " u "-shaped both ends Locate one chamfering of each setting, play a part of strengthening intensity, the bottom rear of release lever 4 sets two gib blocks along two sides 41, the frictional force of release lever 4 in guide groove 1023 slidably can be effectively reduced, release lever 4 is located at magnetic release 15 Lower section, release lever 4 and magnetic release 15 are in the case of the normal operation of circuit breaker without dry under overload short circuit and earth leakage protective state Relate to influence.

As shown in figure 9, in the utility model embodiment, wherein the run-on tab 18 of arc quenching system adds extension to roll over using arcwall face Curved design, extends the distance for keeping 2.5-3.5mm after bending circular arc is installed between moving contact 16, and bending two sides is equidistant similar to two Cambered plate, arcuately face sets a raised striking muscle 181 to the bending lower left of run-on tab 18, and the muscle extends to electric arc and enters arc-chutes Split end；Wherein moving contact 16 is designed using S-shaped, is provided with a long arc shape arc leading angle 161 in contactor end, is prevented ablation contact And be advantageous to striking；The lower section of run-on tab 18 sets a magnetic conduction arc plate 19, and the inside of arc static contact 17 sets a magnetic conduction arc angle 20, the top surface of run-on tab 18 sets a magnetic conduction sheet 21, and static contact bottom surface is provided with an arc separating wall 22, and magnetic conduction sheet 21 is arranged on arc The lower section of wall 22, play a part of producing magnetic.

As shown in Figure 1 and Figure 2, in the utility model embodiment, an independent leakage switch 8 is set on base 101, Earth leakage protective opening and closing can be easily realized, meet the different use function needs of user.

As shown in Figure 1 and Figure 2, in the utility model embodiment, a test button 9 is set on intermediate base 102, During normal operation of circuit breaker, test button 9 is pressed, breaker will repeat the action road after leakage current value reaches predetermined protection value Footpath, periodic detection product creepage protection function.

As shown in Figure 1, Figure 10 shows, in the utility model embodiment, withheld on electrical leakage tripping device 1 provided with a changable Plate 11, manual internal dropout separating brake when can realize testing experiment by the rapid-releasing window 13 on cover plate 103, manually from By thread off, thread off slow reset when and use during the dropout linkage test of the two poles of the earth.

In the utility model embodiment, by closing direction moving operation part, making breaker closing, dynamic/static contact closure Circuit is connected, and in normal working conditions, the vector for flowing through the primary current of zero sequence current mutual inductor 5 is equal to zero, zero sequence electricity The secondary of current transformer 5 does not export；When there is electric leakage in circuit, the vector of the primary current of zero sequence current mutual inductor 5 is not It is equal to zero again, and is equal to leakage current, when leakage current reaches electric leakage set action value, the pair of zero sequence current mutual inductor 5 Side exports a potential, and electric sub-member plate 3 is amplified differentiation, issues instructions to leakage tripping device 2, and leakage tripping device 2 produces Magnetic field dynamic iron core adhesive drives push rod motion, and push rod promotes indication piece 6, and the bottom driver plate 62 of indication piece 6 promotes release lever 4, takes off Button bar 4 is slided by gib block 41 in guide groove 1023, and then drives electrical leakage tripping device 1 to act, and dynamic/static contact is opened Circuit disconnects, and at the same time, the indicator board 62 on the top of indication piece 6 promotes SR 7, and SR 7 is upspring, indication piece 6 with 7 mutual locking of SR positions, and the separating brake index plane 6212 of indication piece 6 is positioned at the lower section of electric leakage indication window 12, electric leakage instruction Shown in red, expression breaker is circuit leak current fault trip protection.

When overload or short trouble occur for transmission line of electricity, electrical equipment or motor, thermal tripping system or magnetic are threaded off System acting, electrical leakage tripping device 1 is promoted, dynamic/static contact is opened into circuit disconnects, and dual loop has overcurrent protection simultaneously. Electric arc can be produced in circuit breaking course, electric arc will extinguish with the arc leading and suppressing of arc quenching system.

Obviously, above-described embodiment of the present utility model is only intended to clearly illustrate the utility model example, and It is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, in described above On the basis of can also make other changes in different forms, there is no need and unable to give all embodiments Exhaustion, and these belong to the obvious changes or variations that connotation of the present utility model is extended out and still fall within this practicality New protection domain.

Claims (11)

1. a kind of mini-type residual current actuated breaker, number of poles is the two poles of the earth, is made up of electric leakage trip unit with breaker unit, its It is characterised by：Wherein leak electricity trip unit and breaker unit uses one-piece integrated structure, housing by base, intermediate base and Cover plate forms；The two poles of the earth main circuit is respectively provided with short circuit, overload and creepage protection function, and sets separate instruction device, mutually Do not disturb；The release lever of electric leakage trip unit is slided by gib block in housing guide groove, and then drives electrical leakage tripping device Action；The arc initiation device of arc quenching system is using the equidistant run-on tab in bending two sides, S-shaped moving contact, arc static contact, magnetic conduction arc Plate, magnetic conduction arc angle, arc separating wall and magnetic conduction sheet.

A kind of 2. mini-type residual current actuated breaker according to claim 1, it is characterised in that：Wherein electric leakage is threaded off single Member uses one-piece integrated structure with breaker unit, and load end electric leakage trip unit includes electrical leakage tripping device, electric leakage is threaded off Device, electric sub-member plate, release lever, zero sequence current mutual inductor.

A kind of 3. mini-type residual current actuated breaker according to claim 1, it is characterised in that：Its center base and cover plate It is structure as a whole, intermediate base is easy to add using the two-section separated structure of intermediate base power end and intermediate base load end Work and Automated assembly, the lower central position that two sections of inwalls correspond to magnetic release respectively set a bar shaped guiding for waiting depth communicated Groove, it is oriented to groove depth 0.8mm to 1.2mm, the sliding groove as release lever slidably.

A kind of 4. mini-type residual current actuated breaker according to claim 1, it is characterised in that：Breaker L poles, N poles Band overload short circuit error protection indication window, in addition, in load end electric leakage trip unit one end of extension design, it is provided with multiple Position button, back-moving spring, indication piece and electric leakage indication window.

A kind of 5. mini-type residual current actuated breaker according to claim 4, it is characterised in that：Wherein indication piece is by axle Set, indicator board and driver plate are formed, and axle sleeve is arranged in the fixing axle of housing, and axle sleeve is cylindrical structure, axle sleeve top and wedge Indicator board is connected, and indicator board upper surface is made up of the reset index plane and separating brake index plane of arc, and indicator board lower surface is one Horizontal locating surface, in "on" position with electric leakage gate-dividing state, locking positioning is played when indication piece is in contact with SR Effect, axle sleeve lower section and a rectangle driver plate are fixedly linked, and are push rod driving face, release lever biography respectively at left and right sides of driver plate Dynamic face.

A kind of 6. mini-type residual current actuated breaker according to claim 4, it is characterised in that：Wherein SR by Button body and latch composition, wherein button body is a square structure, in the body bottom and a square latch It is connected, latch be rectangular aperture slot structure, and the upper surface of wherein open slot is reset locking surface, the facade of open slot is separating brake Locking surface, during breaker closing, SR is pressed, now the reset locking surface of the locating surface of indication piece and SR is mutually locked Fastening position, indication piece reset beneath window of the index plane positioned at electric leakage instruction, and electric leakage instruction is shown as white；When having in circuit Leakage current and when reaching electric leakage set action value, leak electricity separating brake, and SR upsprings, the locating surface and SR of indication piece The positioning of separating brake locking surface phase locking, the separating brake index plane of indication piece is positioned at the beneath window of electric leakage instruction, electric leakage instruction display For red, expression breaker is circuit leak current fault trip protection.

A kind of 7. mini-type residual current actuated breaker according to claim 1, it is characterised in that：Wherein release lever is in big " u "-shaped designs, and at " u "-shaped both ends, bending part respectively sets a chamfering, plays a part of strengthening intensity, release lever bottom rear edge Two sides set two gib blocks, can effectively reduce the frictional force of release lever in guide groove slidably, release lever position In the lower section of magnetic release, release lever and magnetic release overload short circuit and earth leakage protective state in the case of normal operation of circuit breaker Down without interference effect.

A kind of 8. mini-type residual current actuated breaker according to claim 1, it is characterised in that：The striking of arc quenching system Plate adds extension bending design using arcwall face, keeps 2.5-3.5mm distance after extension bending circular arc installation between moving contact, Bending two sides arcuately sets a raised striking muscle in face similar to two equidistant cambered plates, run-on tab bending lower section, and the muscle extends to electricity Arc enters arc-chutes segmentation end, and another tail end is weldingly connected with conducting system；Wherein moving contact is designed using S-shaped, in contact End is provided with a long arc shape arc leading angle, prevents ablation contact and is advantageous to striking；Set below run-on tab with each inside static contact One magnetic conduction arc plate and magnetic conduction arc angle, striking plate top surface are provided with a magnetic conduction sheet, and static contact bottom surface is provided with an arc separating wall, magnetic conduction sheet It is arranged on below arc separating wall, plays a part of producing magnetic.

A kind of 9. mini-type residual current actuated breaker according to claim 1, it is characterised in that：One is set on base Individual independent leakage switch, in that context it may be convenient to realize earth leakage protective opening and closing, meet the different use function need of user Will.

A kind of 10. mini-type residual current actuated breaker according to claim 1, it is characterised in that：On intermediate base One test button is set, in normal operation of circuit breaker, presses test button, breaker reaches pre- by leakage current value is repeated Determine the path of motion after protection value, periodic detection product creepage protection function.

A kind of 11. mini-type residual current actuated breaker according to claim 1, it is characterised in that：In electric leakage dropout machine Structure is provided with a hand tripping pressing plate, can realize that manual inside during testing experiment takes off by the rapid-releasing window on cover plate Deduction of points lock, used in manual automatically jumping, the slow reset of dropout and the two poles of the earth dropout linkage test.