CN207367895U - Breaker and its current transformer and the household electrical appliance comprising the breaker - Google Patents

Abstract

The utility model, which provides a kind of breaker and its current transformer and the household electrical appliance comprising the breaker, the current transformer, to be included：Housing, zero-sequence mutual inductance coil, Current Mutual Inductance coil, phase conductor and neutral conductor；The zero-sequence mutual inductance coil and Current Mutual Inductance coil are contained in the housing stacked on top of each otherly；The induction part of the phase conductor is also cross the zero-sequence mutual inductance coil and Current Mutual Inductance coil, so that zero-sequence mutual inductance coil and Current Mutual Inductance coil share the phase conductor；And the induction part of the neutral conductor passes through zero-sequence mutual inductance coil.Such scheme according to the present utility model, two transformer housings are changed to one, reduce a transformer housing, the safe space between the current transformer saved and zero sequence transformer housing on PCB so that area occupied of the mutual inductor on PCB reduces more than half.

Description

Breaker and its current transformer and the household electrical appliance comprising the breaker

Technical field

The present invention relates to circuit protection technical field, more particularly to a kind of breaker and its current transformer and comprising The household electrical appliance of the breaker.

Background technology

Arc fault is mainly derived from insulation damages aging or connector pine in electric device and coupled equipment It is dynamic, it is security risk common in electric wiring.Household AC electric arc stoppage circuit breaker (Arc Fault Circuit Interrupters, abbreviation AFCI) by detecting the arcing current in electric device, by arcing current and fire hazard working value Compare, more than when cut off the power.The sensor for wherein detecting curent change is very important part.The sensor of AFCI For the current transformer of curent change in induction electric device incoming end firewire, it is essentially a transformer, and primary is phase Line, through magnet ring center, secondary windings is enameled wire around the certain number of turn of magnet ring, enameled wire both ends output access control panel.

Household AC residual current operated protective device (residual current operated protective device, letter Referred to as RCD) it is a kind of safeguard procedures for preventing person electric shock, electrical fire and electrical equipment damage.It is by detecting electrically dress Leakage current in putting and as caused by electric trace galvanic current over the ground arcing current and effectively reduce fire hazard.The sensor of RCD For sensing phase line and the zero sequence current mutual inductor of the difference between current of the neutral conductor.The mutual current sensors of zero sequence are also a transformer；At the beginning of it Level is phase line and the neutral conductor, and through magnet ring center, secondary windings connects for enameled wire around the certain number of turn of magnet ring, the output of enameled wire both ends Enter control panel.

The structure of the armature winding of above-mentioned current transformer and zero sequence current mutual inductor described below, secondary windings and housing List.

AFCI also integrates other safety protection functions, such as integrated electricity leakage protection generally in addition to fault electric arc is protected.Therefore, The device at least needs 2 sensors：Zero sequence current mutual inductor and current transformer.It is each by common practices, this 2 separate units From being welded on control panel；If the application publication number on the 17th of August in 2016 is CN105869962A《Suitable for the electric leakage of Automated assembly Protector structure》, using 2 transformer housings.For another example, the detection plate (30001.8000021MX) that Gree washing machine uses Using 2 mutual inductors.Each mutual inductor makes a unit, each unit include armature winding power input output interface, Magnet ring and two interfaces and its housing of secondary windings output.Set on control panel corresponding mutual inductor installation site and with Upper interface pad.For armature winding, that is, phase line or the neutral conductor by magnet ring, magnet ring is passed through with cabtyre flexible wire, it is this Low production efficiency, uniformity is poor, general not to use in the big product of output.Therefore it is fixed on mutually using bare wire mostly at present On sensor housing, and it is welded on PCB.

In this way, armature winding needs 2 phase lines and 1 center line altogether, totally 6 power cords input PCB interfaces, it is also necessary to 2 A transformer housing installation site, and 4 output interfaces of secondary windings.Between housing and housing, between phase line and phase line, also Need certain safe distance.Not only occupy larger PCB to take, cause the volume of whole protective device to increase, production effect Rate is relatively low.Therefore, it is necessary to provide a kind of structure for integrating two kinds of mutual inductors that can overcome any of the above-described defect.

The content of the invention

In view of this, the present invention provides a kind of breaker and its current transformer and the household electric comprising the breaker Device, carries out function integration by the phase line of two current transformers and installation housing, the structural member after change design is taken a thing Multi-purpose function.

According to the first aspect of the invention, there is provided a kind of current transformer of breaker, including：Housing, zero-sequence mutual inductance line Circle, Current Mutual Inductance coil, phase conductor and neutral conductor；

Zero-sequence mutual inductance coil and Current Mutual Inductance coil accommodate in the housing stacked on top of each otherly；

The induction part of phase conductor is also cross zero-sequence mutual inductance coil and Current Mutual Inductance coil, so that zero-sequence mutual inductance coil Phase conductor is shared with Current Mutual Inductance coil；And

The induction part of neutral conductor passes through zero-sequence mutual inductance coil.

It is further preferred that the current transformer further includes：

Intermediate insulation gasket between zero-sequence mutual inductance coil and Current Mutual Inductance coil, it is mutual with electric current positioned at phase conductor Feel the upper insulation spacer between coil.

It is further preferred that the current transformer further includes：

Lower insulation spacer on the downside of zero-sequence mutual inductance coil.

It is further preferred that first pair of contact pin and second pair of contact pin are set on housing；

The secondary windings of Current Mutual Inductance coil is connected on first pair of contact pin, and the inductive signal as current transformer exports End；And

The secondary windings of zero-sequence mutual inductance coil is connected on second pair of contact pin, and the inductive signal as zero sequence transformer is defeated Outlet.

It is further preferred that housing includes tubular periphery wall portion and is formed in being formed along stacked direction in periphery wall portion Inner circumferential wall portion；Current Mutual Inductance coil and zero-sequence mutual inductance coil are placed between periphery wall portion and inner circumferential wall portion, and phase conductor Induction part and neutral conductor sensing part in inner circumferential wall portion.

It is further preferred that it is provided with distance member between the induction part of phase conductor and the induction part of neutral conductor.

It is further preferred that distance member is the vertical partition plate extended along stacked direction.

It is further preferred that water is provided with along perpendicular to the stacked direction on the inside of the periphery wall portion of the housing Flat distance member, to form upper and lower two cavitys in the periphery wall portion of the housing, one in upper and lower two cavitys A cavity is used to accommodate current transformer, another cavity in upper and lower two cavitys is used to accommodate zero sequence transformer.

It is further preferred that the vertical partition plate extended along the stacked direction is set in the inner side of interior surrounding wall portion, One semicircle of the vertical partition plate and internal perisporium surrounds the one of perforation zero sequence transformer installation cavity and current transformer installation cavity A cavity, the chamber are the induction part for accommodating phase conductor；Another of vertical partition plate and internal perisporium semicircle surround perforation zero sequence One cavity of mutual inductor installation cavity, the chamber are the induction part for accommodating neutral conductor.

It is further preferred that first fixed structure and the second fixed structure are also formed with periphery wall portion, the first fixed knot Structure is used to fix phase conductor, and the second fixed structure is used to fix neutral conductor.

It is further preferred that first fixed structure includes：

Buckle structure, for the card-tight part of clamping phase conductor, which passes through the buckle structure；And

Position limiting structure, is formed in the end of the side opposite with housing of the buckle structure, for the limiting section to phase conductor Carry out spacing.

It is further preferred that buckle structure is formed as raised structures, there is card slot, the card of phase conductor on the raised structures Tight portion passes through card slot；And

The vertical channel that position limiting structure is inserted and fixed formed with the limiting section for phase conductor.

It is further preferred that the second fixed structure is formed in the position of side opposite with the housing of first fixed structure, and tie Structure is identical with first fixed structure.

It is further preferred that phase conductor and/or neutral conductor include：Connecting portion, fixed part, automatically controlled power supply, electricity Source output section and induction part；

The end of induction part forms the input terminal of power supply phase line；Fixed part is fixed on housing；Connecting portion is connected to sensing Between portion and fixed part；The end of automatically controlled power supply is feeder ear, and power output part is equipped with power output end.

It is further preferred that phase conductor and/or neutral conductor include：Connecting portion, card-tight part, limiting section, automatically controlled confession Electric portion, power output part and induction part；

The end of induction part forms the input terminal of power supply phase line；Card-tight part is fixed on buckle structure；Limiting section is fixed on limit Bit architecture；Connecting portion is connected between induction part and fixed part；The end of automatically controlled power supply is feeder ear, and power output part is equipped with Power output end.

It is further preferred that sensing minister of the induction part of phase conductor than neutral conductor.

It is further preferred that the card-tight part and limiting section of phase conductor and neutral conductor, automatically controlled power supply and power supply are defeated Go out portion to be symmetrical arranged along the central plane in stacked direction.

It is further preferred that insulation spacer includes：The bottom plate formed in the horizontal direction, bottom plate, which is centrally formed, to be useful for for each The through hole that the induction part of conductor passes through；And the limit rib erected from floor peripheral.

It is further preferred that the bottom plate back side formed it is fluted, for the phase conductor to being positioned above after assembling or its The neutral conductor of lower section carries out spacing.

It is further preferred that limit rib includes：

The first cylinder groove erected from bottom edge；

The the first cylinder muscle erected from bottom edge；

The the second cylinder muscle erected from bottom edge；And

The second cylinder groove erected from bottom edge.

It is further preferred that the first cylinder muscle is symmetrical according to the central plane along stacked direction with first cylinder groove Position is erected from bottom edge；

Second cylinder muscle with the first cylinder groove according to the plane symmetrical position vertical with central plane from bottom edge Erect；And

Second cylinder groove is being erected with the second cylinder muscle according to the symmetrical position of central plane from bottom edge；

Wherein, when two insulation spacers mutually assemble, the first cylinder muscle is embedded into the first cylinder groove, the second cylinder muscle It is embedded into the second cylinder groove.

It is further preferred that housing includes：Bottom case and middle shell；Zero-sequence mutual inductance coil is installed under the bottom case；In Neutral conductor is installed between shell and bottom case；Current Mutual Inductance coil is installed on middle shell.

It is further preferred that housing further includes upper cover, upper cover is covered in the top of Current Mutual Inductance coil.

According to the second aspect of the invention, there is provided a kind of breaker, including above-mentioned current transformer.

According to the third aspect of the invention we, there is provided a kind of household electrical appliance, including above-mentioned breaker.

The current transformer of the present invention is described above.Such scheme according to the present invention, by two mutual inductors Housing is changed to one, reduces a transformer housing, in PCB between the current transformer saved and zero sequence transformer housing On safe space so that area occupied of the mutual inductor on PCB reduces more than half.Also, reduce a phase line, it is primary Power interface of the winding on PCB is reduced to 4 by 6, while improving production efficiency, reduces the hidden danger of failure welding, Improve electric-controlled plate reliability.

Further detailed description is done to technical scheme below in conjunction with the drawings and the specific embodiments, the present invention Beneficial effect will be further appreciated.

Brief description of the drawings

Attached drawing described herein is used for providing a further understanding of the present invention, forms the part of the present invention, is used for Explain the present invention, do not form inappropriate limitation of the present invention.

Fig. 1 shows the exploded perspective view of a preferred embodiment of current transformer according to the present invention.

Fig. 2 shows the assembling stereogram of a preferred embodiment of current transformer according to the present invention.

Fig. 3 (a) shows the plan front view of the housing of a preferred embodiment；Fig. 3 (b) shows that one is preferable to carry out The bottom plan view of the housing of example.

Fig. 4 shows the profile of the housing cutd open along the line B-B in Fig. 3 (b).

Fig. 5 (a) shows the assembling structure top view of current transformer as shown in Figure 2；Fig. 5 (b) is shown along Fig. 5 (a) sectional view for the assembling structure that the line B-B shown in cuts open.

Fig. 6 (a) shows the three-dimensional structure diagram of the phase conductor, and Fig. 6 (b) shows the phase conductor shown in Fig. 6 (a) Structure front view, Fig. 6 (c) shows the top view of the structure of the phase conductor shown in Fig. 6 (a), and Fig. 6 (d) is along Fig. 6 (c) sectional view for the phase conductor that the line B-B shown in cuts open.

Fig. 7 (a) shows the three-dimensional structure diagram of the neutral conductor, and Fig. 7 (b) shows the neutral conductor shown in Fig. 7 (a) The front view of the structure of conductor, Fig. 7 (c) show the top view of the structure of the neutral conductor shown in Fig. 7 (a), and Fig. 7 (d) sectional view for the neutral conductor cutd open along the line B-B shown in Fig. 7 (c).

Fig. 8 (a) shows that current transformer according to the present invention removes the exploded perspective view after housing and conductor, figure 8 (b) shows the assembling stereogram of the structure as described in Fig. 8 (a).

Fig. 9 (a) shows the structural perspective of insulation spacer；Fig. 9 (b) shows the backside structure of the insulation spacer； Fig. 9 (c) shows the setting plane of each insulation spacer.

Figure 10 shows the exploded perspective view of the current transformer of another preferred embodiment according to the present invention.

Embodiment

To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and Technical solution of the present invention is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the present invention one Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing Go out all other embodiments obtained under the premise of creative work, belong to the scope of protection of the invention.

【First embodiment】

The current transformer of breaker according to the present invention is described with reference to Fig. 1,2 first.Fig. 1 shows institute according to the present invention The exploded perspective view of one preferred embodiment of the current transformer stated, Fig. 2 show current transformer according to the present invention A preferred embodiment assembling stereogram.

As described in Figure 1, the current transformer includes：Housing 3, zero-sequence mutual inductance coil 2, Current Mutual Inductance coil 5, positioned at zero Intermediate insulation gasket 4, phase conductor 6 and neutral conductor 8, the zero sequence between sequence mutual inductor and Current Mutual Inductance coil is mutual Sense coil 2, Current Mutual Inductance coil 5 and the intermediate insulation gasket 4 are contained in the housing 3 stacked on top of each otherly.Wherein, phase The induction part 65 (shown in such as Fig. 5 (b)) of line conductor 6 is also cross zero-sequence mutual inductance coil 2 and Current Mutual Inductance coil 5 (in preferably The heart) so that zero-sequence mutual inductance coil 2 and Current Mutual Inductance coil 5 share the phase conductor 6；And the sensing of neutral conductor 8 Portion passes through zero-sequence mutual inductance coil 2 (preferred center).That is, 2 center of zero-sequence mutual inductance coil has phase conductor 6 and the neutral conductor to lead Body 8 is by the way that the armature winding of zero sequence transformer is phase conductor 6 and neutral conductor 8；Only have at 5 center of Current Mutual Inductance coil Phase conductor 6 is by the way that the armature winding of current transformer is phase conductor 6.

Wherein, as shown in Fig. 2, setting first pair of contact pin 31,32 and second pair of contact pin 33,34 on housing 3.Current Mutual Inductance line The secondary windings of circle 5 is connected on first pair of contact pin 31 and 32, and the inductive signal as current transformer exports, zero-sequence mutual inductance line The secondary windings of circle 2 is connected on second pair of contact pin 33 and 34, and the inductive signal as zero sequence transformer exports.First pair is inserted Pin 31 and 32 and second pair of contact pin 33 and 34 are connected with electric-controlled plate.

Preferably, the current transformer further comprises insulation spacer 7 and lower insulation spacer 1, wherein upper felt pad Piece 7 is formed in the upside of Current Mutual Inductance coil 5, and lower insulation spacer 1 is formed in the downside of zero-sequence mutual inductance coil 2.The present invention also may be used Not limited to this, can also be using for example, realize insulation by the way of insulating materials is coated on conductor or coil.

Preferably, as shown in Fig. 2, the housing 3 includes tubular periphery wall portion 35 and is formed in the periphery wall portion 35 Inner circumferential wall portion 36, inner circumferential wall portion 36 extends along the stacked direction.The Current Mutual Inductance coil 2 and zero-sequence mutual inductance coil 5 It is placed between periphery wall portion 35 and inner circumferential wall portion 36, and the induction part of the phase conductor 6 and the neutral conductor 8 Sensing part is in the inner circumferential wall portion.And preferably, distance member, such as the vertical partition plate along the stacked direction extension 37 are arranged between the induction part of phase conductor 6 and the induction part of neutral conductor 8.

The electric current that the present invention is further described below in conjunction with Fig. 3 (a), Fig. 3 (b) and Fig. 4, Fig. 5 (a) and Fig. 5 (b) is mutual The structure of one preferred embodiment of the housing of sensor.Fig. 3 (a) shows the plane of the housing 3 of a preferred embodiment Front view；Fig. 3 (b) shows the bottom plan view of the housing of a preferred embodiment.Fig. 4 is shown along the B- in Fig. 3 (b) The profile for the housing that B lines cut open.Fig. 5 (a) shows the assembling structure top view of current transformer as shown in Figure 2, Fig. 5 (b) shows the sectional view for the assembling structure cutd open along the line B-B shown in Fig. 5 (a).

Prolong it is further preferred that being set in the inner side of interior surrounding wall portion 36 (preferably heart position wherein) along the stacked direction The vertical partition plate 37 stretched, so that the vertical partition plate 37 surrounds two cavitys with inner circumferential wall portion 36, as shown in figure 4, one is The first chamber 312 of the induction part of phase conductor is accommodated, another is the second chamber 310 of the induction part for accommodating neutral conductor.With And it is further preferred that level is provided with along perpendicular to the stacked direction in the inner side of periphery wall portion 35 of the housing 3 Distance member, such as horizontal baffle 38, so as to form upper and lower two cavitys in the periphery wall portion 35 of the housing 3, i.e., Lower chamber 311 of the upper cavity 39 and lower part that top is used to accommodate current transformer 5 for accommodating zero sequence transformer 2.Need to refer to Go out, the horizontal interval component is not necessary, and its form is also not necessarily limited to the horizontal baffle, as long as being advantageously implemented The relative position of Current Mutual Inductance coil 5 and zero-sequence mutual inductance coil 2 in the housing 3, such as can be in the housing 3 Periphery wall portion on the inside of, flange etc. for being formed along the center in the stacked direction.

And further, as shown in Fig. 3 (a), Fig. 5 (b), first is also formed with the periphery wall portion 35 of the housing 3 313 and second fixed structure 314 of fixed structure, is respectively used to fix the phase conductor 6 and neutral conductor 8.Preferably, water Right side above flat partition board 38, forms the first fixed structure 313, which includes buckle structure 3131, for card The card-tight part 67 for the phase conductor 6 that tight horizontal direction passes through (shown in such as Fig. 5 (b))；And this is formed in the remote of buckle 3131 The position limiting structure 3132 of the end of 3 place side of shrinking away from theshell body, for the spacing of phase conductor 6.As shown in Fig. 5 (b), the buckle 3131, for example, raised structures formed with the card slot passed through for 6 card-tight part 67 of phase conductor, the position limiting structure 3132 is for example For the spacing of the vertical channel that is inserted and fixed formed with vertical ends, that is, limiting section 68 (such as Fig. 5 (b) shown in) for phase conductor 6 Structure.Similar, described second is provided with the position of the 3 place side of remote housing with the first fixed structure 313 and is fixed Structure 314, its structure is similar with first fixed structure 313, for fixing neutral conductor 8.It is pointed out that above-mentioned fixation Structure also can not limited to this, as long as the fixation of the phase conductor can be realized.

Below in conjunction with the phase conductor 6 of Fig. 2, Fig. 6 (a)-(d), 7 (a)-(d) description according to one preferred embodiment of the present invention With the structure of neutral conductor 8.Fig. 6 (a) shows the three-dimensional structure diagram of the phase conductor, and Fig. 6 (b) shows Fig. 6 (a) institutes The front view of the structure for the phase conductor shown, Fig. 6 (c) show the top view of the structure of the phase conductor shown in Fig. 6 (a), with And the sectional view of the phase conductor that the line B-B shown in Fig. 6 (d) along Fig. 6 (c) cuts open.Fig. 7 (a) shows the neutral conductor The three-dimensional structure diagram of conductor, Fig. 7 (b) show the front view of the structure of the neutral conductor shown in Fig. 7 (a), and Fig. 7 (c) is shown The top view of the structure of neutral conductor shown in Fig. 7 (a), and the institute that line B-B shown in Fig. 7 (d) along Fig. 7 (c) cuts open State the sectional view of neutral conductor.

First as shown in Fig. 2, the phase conductor 6 is provided with end 61,62,63；End 61 is the input of power supply phase line End, end 63 is power supply phase line output terminal；And end 62 is can be as the power supply phase line end of automatically controlled circuit.Power supply phase line exports Contact 60 is provided with end, can be as the stationary contact of protective device, can also be as the movable contact of protective device.

Then as shown in Fig. 6 (a) -6 (d), the phase conductor includes induction part 65, connecting portion 66, card-tight part 67 and limit Position portion 68, automatically controlled power supply 69 and power output part 610.As described above, induction part 65 is also cross the Current Mutual Inductance line 5 and zero-sequence mutual inductance coil 2 are enclosed, and the input terminal 61 of the power supply phase line, the card-tight part 67 and limiting section are formed in its end 68 are separately fixed on buckle structure 3131 and position limiting structure 3132 on housing 3, and connecting portion 66 is connected to the sensing Between portion 65 and card-tight part 67.The end of the automatically controlled power supply 69 is the power supply phase line end 62, the power output part 610 Equipped with the power supply phase line output terminal 63.

Similar, as shown in Fig. 2,7 (a)-(d), the neutral conductor 8 has to be generally corresponding to the phase conductor 6 Structure.Specifically, as shown in Fig. 2, the neutral conductor 8 is provided with end 81,82,83；End 81 is mains neutral line Input terminal, end 83 are mains neutral line output terminal；And the power supply neutral terminal that end 82 is automatically controlled circuit.Mains neutral line Contact 80 is provided with output terminal, can be as the stationary contact of protective device.

Then as shown in Fig. 7 (a) -7 (d), the neutral conductor includes induction part 85, connecting portion 86,87 He of card-tight part Limiting section 88, automatically controlled power supply 89 and power output part 810.As described above, induction part 85 passes through zero-sequence mutual inductance coil 2, and The neutral conductor input terminal 81 is formed in its end.Similar with phase conductor 6, the card-tight part 87 and limiting section 88 are solid respectively The second fixed structure 314 being scheduled on housing 3, details are not described herein.And connecting portion 86 is connected to the induction part 85 and card Between tight portion 87.The end of the automatically controlled power supply 89 is the power supply neutral terminal 82, and the power output part 810 is equipped with institute State mains neutral line output terminal 83.

It is further preferred that the induction part 65 of phase conductor 6 is relatively long, so that it is also cross zero-sequence mutual inductance coil 2 and the center of Current Mutual Inductance coil 5；Its connecting portion 66 is in the top of zero-sequence mutual inductance coil 2 and Current Mutual Inductance coil 5.The neutral conductor The induction part 85 of conductor 8 is relatively short, its center just through zero-sequence mutual inductance coil 2；Its connecting portion 86 is in zero-sequence mutual inductance coil Between Current Mutual Inductance coil.

And it is further preferred that the card-tight part 67/87 and limiting section 68/88 of phase conductor 6 and neutral conductor 8, electricity Power supply 69/89 and power output part 610/810 are controlled according to vertical center plane (along the central plane in the stacked direction, i.e., By the plane at the center of 37 thickness direction of vertical partition plate as shown in Fig. 5 (b)) it is symmetrical arranged.It is apparent that the solution of the present invention Also can not limited to this.

Illustrate each gasket of the present invention below in conjunction with Fig. 1, Fig. 8 (a), Fig. 8 (b) and Fig. 9 (a), (b), (c) The structure of preferred embodiment.Fig. 8 (a) shows that current transformer according to the present invention removes point after housing and conductor Stereogram is solved, Fig. 8 (b) shows the assembling stereogram of the structure as described in Fig. 8 (a).Fig. 9 (a) shows the knot of insulation spacer Structure stereogram；Fig. 9 (b) shows the backside structure of the insulation spacer；Fig. 9 (c) shows the fitting plane of each insulation spacer Figure.

Lower edge gasket 1 is installed on below zero-sequence mutual inductance coil 2 as shown in Fig. 1,8 (a)；Intermediate insulation gasket 4 is installed on electricity Flow below mutual inductor 5；Upper insulation spacer 7 is installed on above Current Mutual Inductance coil 5.Intermediate insulation gasket 4 is Current Mutual Inductance line Circle 5 carries out electrical isolation with neutral conductor 8；Upper insulation spacer 7 Current Mutual Inductance coil 5 and phase conductor 6 carry out electrically every From preventing mutual inductor from directly being contacted with conductor thus being electrically shocked and burn short circuit.Preferably, each insulation spacer is made of silica gel, There is certain elasticity, so as to the rigid fit-up gap between compensation mutual inductor and housing.

Wherein it is preferred to 1,4,7 structure of each insulation spacer is identical, and the attaching that can work in coordination.Following felt pad Exemplified by piece 1, the structure of the insulation spacer is described with reference to Fig. 9.Fig. 9 (a) shows the structure of the insulation spacer Stereogram.As shown in Fig. 9 (a), the horizontal direction of insulation spacer has a bottom plate 11, and bottom plate is centrally formed with through hole 111, for wearing Cross the inner circumferential wall portion 36 of housing 3 and the induction part of each conductor；And erected from 11 periphery of bottom plate (preferably surrounding) Limit rib (preferably multiple).As shown in Fig. 9 (b), bottom plate 11 is preferably overleaf equipped with a groove 12, for position after assembling Square thereon phase conductor or neutral conductor below carry out spacing.Preferably, bottom plate 11 has mutual inductance in four angles above The limit rib of coil, the encirclement shape that the limit rib of corner is formed are more smaller than housing installation cavity.Below to described spacing Muscle is described.

Insulation spacer as described in Fig. 9 (a), one in the muscle of corner is provided with the first cylinder groove 13 above.With this One cylinder groove 13 according to along the stacked direction central plane (center by vertical partition plate 37 as shown in Fig. 5 (b) it is flat Face) symmetrical position is provided with the first cylinder muscle 14 erected from bottom edge.Put down with the first cylinder groove 13 according to center The face symmetrical position of vertical plane is provided with the second cylinder muscle 15 erected from bottom edge.With the second cylinder muscle 15 along institute State and the second cylinder groove 16 is provided with the angle muscle of the symmetrical position of central plane.And first the side of cylinder groove 13 be provided with One protrusion 17, a penetrating up and down groove 18 is provided with it along the symmetrical position of vertical central plane.

As shown in Fig. 8 (b), two insulation spacers assemble face-to-face.First cylinder muscle 14 is just mounted to the first cylinder groove In 13, the second cylinder muscle 15 is just mounted in the second cylinder groove 16, so as to form the confined state as shown in Fig. 8 (b).

Preferably, the height of the corner muscle of insulation spacer is more smaller than the half of Current Mutual Inductance coil height；Each cylinder groove Depth dimensions is equal to the height of corner muscle；The height dimension of each cylinder muscle is slightly less than the height of corner muscle.The diameter of each cylinder groove Equal to the diameter of each cylinder muscle.

Further, trapped gas influences assembling in order to prevent, and above-mentioned groove column has been equipped with side assembling exhaust notch.

Further, there is provided cabling canonical path.Protrusion 17 is just mounted in groove 18, is formed as shown in 9 (c) Close notch 10.Current Mutual Inductance coil output line is drawn from this notch, and housing bottom is gone to downwards along the edge of housing, and around It is connected on corresponding contact pin.

【Second embodiment】

As alternate embodiment, the installation of housing and insulation spacer and isolation features can be decomposed and combined, as long as ensureing Mutual inductor stacks installation, you can reduces its area occupied on PCB.It is both zero-sequence mutual inductance meanwhile one line of phase conductor is dual-purpose The armature winding of device, and the armature winding of current transformer, it is possible to realize that part is reduced, reliability improves, and reaches this hair Bright purpose.And the concrete shape feature of housing, conductor, gasket etc., up and down structural orientation etc. can be according to being applied Protective device specifically assembles situation and makes corresponding change.The current transformer of another embodiment of the present invention is described below.

Figure 10 shows the exploded perspective view of the current transformer of another preferred embodiment according to the present invention.Such as Figure 10 Shown, the current transformer includes：4 contact pins 101, gasket 102 and 109, zero-sequence mutual inductance coil 103, one as two Middle 105, one, shell Current Mutual Inductance coil 106, one phase conductor 107 of a neutral conductor 1010, one of bottom case 104, one, One upper cover 108.The bottom case 104, its lower installation zero-sequence mutual inductance coil 103, zero sequence transformer 103 is below silica gel pad 102.Neutral conductor 1010 is installed between the middle shell 105 and bottom case 104.Current Mutual Inductance coil is installed on middle shell 105 106；Current Mutual Inductance coil 106 is above silica gel pad 109.Phase conductor 107 is installed on silica gel pad 109.In phase conductor Face is upper cover 108.Upper cover 108 and bottom case 109 are fixed together coil therein, conductor by snapping connection.

In above-mentioned current transformer, installation can be stacked from bottom to top, and assembling is simple.Insulation spacer shape is simple, and can To be reduced to 2 by 3；Housing is decomposed into three parts, i.e. upper cover, middle shell and bottom case with reference to the embodiment of Fig. 1.

The current transformer of the present invention is described above.Such scheme according to the present invention, by two mutual inductors Housing is changed to one, reduces a transformer housing, saves between current transformer and zero sequence transformer housing on PCB Safe space so that area occupied of the mutual inductor on PCB reduces more than half, also, reduces a phase line, it is primary around Power interface of the group on PCB is reduced to 4 by 6, while improving production efficiency, reduces the hidden danger of failure welding, carries High electric-controlled plate reliability.

The foregoing is merely the preferred embodiment of the present invention, is not intended to limit the invention, for those skilled in the art For, the present invention can have various modifications and changes.All any modifications made within spirit and principles of the present invention, be equal Replace, improve etc., it should all be included in the protection scope of the present invention.

Claims (25)

1. A kind of 1. current transformer of breaker, it is characterised in that, including：Housing, zero-sequence mutual inductance coil, Current Mutual Inductance coil, Phase conductor and neutral conductor；

   The zero-sequence mutual inductance coil and Current Mutual Inductance coil are contained in the housing stacked on top of each otherly；

   The induction part of the phase conductor is also cross the zero-sequence mutual inductance coil and Current Mutual Inductance coil, so that zero-sequence mutual inductance Coil and Current Mutual Inductance coil share the phase conductor；And

   The induction part of the neutral conductor passes through zero-sequence mutual inductance coil.
2. 2. current transformer as claimed in claim 1, it is characterised in that further include：

   Intermediate insulation gasket between zero-sequence mutual inductance coil and Current Mutual Inductance coil, positioned at phase conductor and Current Mutual Inductance line Upper insulation spacer between circle.
3. 3. current transformer as claimed in claim 1, it is characterised in that further include：

   Lower insulation spacer on the downside of zero-sequence mutual inductance coil.
4. 4. such as claim 1-3 any one of them current transformers, it is characterised in that wherein,

   First pair of contact pin and second pair of contact pin are set on the housing；

   The secondary windings of Current Mutual Inductance coil is connected on first pair of contact pin, the inductive signal output terminal as current transformer； And

   The secondary windings of zero-sequence mutual inductance coil is connected on second pair of contact pin, and the inductive signal as zero sequence transformer exports End.
5. 5. current transformer as claimed in claim 1, it is characterised in that wherein,

   The housing includes tubular periphery wall portion and is formed in along being formed along the stacked direction in the periphery wall portion Surrounding wall portion；The Current Mutual Inductance coil and zero-sequence mutual inductance coil are placed between periphery wall portion and inner circumferential wall portion, and the phase line The sensing part of the induction part of conductor and the neutral conductor is in the inner circumferential wall portion.
6. 6. current transformer as claimed in claim 5, it is characterised in that wherein,

   Distance member is provided between the induction part of the phase conductor and the induction part of the neutral conductor.
7. 7. current transformer as claimed in claim 6, it is characterised in that wherein,

   The distance member is the vertical partition plate along the stacked direction extension.
8. 8. such as claim 5-7 any one of them current transformers, it is characterised in that wherein,

   Horizontal interval component is provided with along perpendicular to the stacked direction on the inside of the periphery wall portion of the housing, with institute State and upper and lower two cavitys are formed in the periphery wall portion of housing, a cavity in upper and lower two cavitys is used to accommodate electric current Mutual inductor, another cavity in upper and lower two cavitys are used to accommodate zero sequence transformer.
9. 9. current transformer as claimed in claim 7, it is characterised in that wherein, set in the inner side of interior surrounding wall portion along described One semicircle of the vertical partition plate of stacked direction extension, the vertical partition plate and internal perisporium surrounds perforation zero sequence transformer One cavity of installation cavity and current transformer installation cavity, the chamber are the induction part for accommodating phase conductor；

   Another of vertical partition plate and internal perisporium semicircle surround a cavity of perforation zero sequence transformer installation cavity, which is appearance Receive the induction part of neutral conductor.
10. 10. current transformer as claimed in claim 5, it is characterised in that wherein,

    First fixed structure and the second fixed structure are also formed with the periphery wall portion, first fixed structure is used for described in fixation Phase conductor, the second fixed structure are used to fix the neutral conductor.
11. 11. current transformer as claimed in claim 10, it is characterised in that wherein,

    The first fixed structure includes：

    Buckle structure, for the card-tight part of clamping phase conductor, which passes through the buckle structure；And

    Position limiting structure, is formed in the end of the side opposite with housing of the buckle structure, for the limiting section to the phase conductor Carry out spacing.
12. 12. current transformer as claimed in claim 11, it is characterised in that wherein,

    The buckle structure is formed as raised structures, has card slot on the raised structures, and the card-tight part of the phase conductor passes through The card slot；And

    The vertical channel that the position limiting structure is inserted and fixed formed with the limiting section for phase conductor.
13. 13. current transformer as claimed in claim 12, it is characterised in that wherein,

    Second fixed structure is formed in the position of side opposite with the housing of the first fixed structure, and structure is consolidated with first It is identical to determine structure.
14. 14. current transformer as claimed in claim 1, it is characterised in that wherein,

    The phase conductor and/or the neutral conductor include：Connecting portion, fixed part, automatically controlled power supply, power output part and The induction part；

    The end of the induction part forms the input terminal of power supply phase line；The fixed part is fixed on the housing；The connection Portion is connected between the induction part and fixed part；The end of the automatically controlled power supply is feeder ear, and the power output part is set There is power output end.
15. 15. such as claim 11-13 any one of them current transformers, it is characterised in that wherein,

    The phase conductor and/or the neutral conductor include：Connecting portion, the card-tight part, the limiting section, automatically controlled power supply Portion, power output part and the induction part；

    The end of the induction part forms the input terminal of power supply phase line；The card-tight part is fixed on the buckle structure；The limit Position portion is fixed on the position limiting structure；The connecting portion is connected between the induction part and fixed part；The automatically controlled power supply End be feeder ear, the power output part is equipped with power output end.
16. 16. current transformer as claimed in claim 14, it is characterised in that wherein,

    Sensing minister of the induction part of phase conductor than neutral conductor.
17. 17. current transformer as claimed in claim 15, it is characterised in that wherein,

    The card-tight part and limiting section of phase conductor and neutral conductor, automatically controlled power supply and power output part are along the stacked direction Central plane be symmetrical arranged.
18. 18. current transformer as claimed in claim 2 or claim 3, it is characterised in that wherein,

    Insulation spacer includes：The bottom plate formed in the horizontal direction, the bottom plate are centrally formed the induction part being useful for for each conductor The through hole passed through；And the limit rib erected from the floor peripheral.
19. 19. current transformer as claimed in claim 18, it is characterised in that wherein,

    The bottom plate back side forms fluted, is led for the phase conductor to being positioned above after assembling or the neutral conductor below Body carries out spacing.
20. 20. current transformer as claimed in claim 18, it is characterised in that wherein,

    The limit rib includes：

    The first cylinder groove erected from the bottom edge；

    The the first cylinder muscle erected from the bottom edge；

    The the second cylinder muscle erected from the bottom edge；And

    The second cylinder groove erected from the bottom edge.
21. 21. current transformer as claimed in claim 20, it is characterised in that wherein,

    The first cylinder muscle with first cylinder groove according to along the symmetrical position of central plane in the stacked direction from institute Bottom edge is stated to erect；

    The second cylinder muscle with the first cylinder groove according to the plane symmetrical position vertical with the central plane from described Bottom edge erects；And

    Second cylinder groove is being erected with the second cylinder muscle according to the symmetrical position of the central plane from the bottom edge；

    Wherein, when two insulation spacers mutually assemble, the first cylinder muscle is embedded into first cylinder groove, and described Two cylinder muscle are embedded into second cylinder groove.
22. 22. current transformer as claimed in claim 1, it is characterised in that wherein,

    The housing includes：Bottom case and middle shell；Zero-sequence mutual inductance coil is installed under the bottom case；The middle shell and bottom case it Between the neutral conductor is installed；Current Mutual Inductance coil is installed on the middle shell.
23. 23. current transformer as claimed in claim 22, it is characterised in that wherein,

    The housing further includes upper cover, and the upper cover is covered in the top of the Current Mutual Inductance coil.
24. 24. a kind of breaker, it is characterised in that including such as claim 1-23 any one of them current transformer.
25. 25. a kind of household electrical appliance, it is characterised in that including breaker as claimed in claim 24.