CN108493062A - Major loop for residual current circuit breaker - Google Patents
Major loop for residual current circuit breaker Download PDFInfo
- Publication number
- CN108493062A CN108493062A CN201810527147.4A CN201810527147A CN108493062A CN 108493062 A CN108493062 A CN 108493062A CN 201810527147 A CN201810527147 A CN 201810527147A CN 108493062 A CN108493062 A CN 108493062A
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- CN
- China
- Prior art keywords
- conductor
- phase
- circuit breaker
- endoporus
- major loop
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/08—Terminals; Connections
Abstract
The present invention provides a kind of major loop for residual current circuit breaker, including：Conductive part comprising at least two phase conductors, mutually insulated between each line conductor, line conductor described in an at least phase are made of two metallic conductors；Current Mutual Inductance portion comprising zero sequence current mutual inductor, the zero sequence current mutual inductor, which runs through, is equipped with endoporus, and each line conductor separation is arranged in the endoporus, the field homogeneity distribution for passing through each line conductor of the endoporus to generate.Distribution of Magnetic Field of the present invention is uniformly reasonable, and switch malfunction risk can be greatly reduced, and stock utilization is high, securely and reliably, simple process and low cost.
Description
Technical field
The present invention relates to low voltage electrical apparatus technology field, specifically a kind of major loop for residual current circuit breaker.
Background technology
Residual current circuit breaker, can be to circuit for phase three-wire three, the electricity supplying and using system of three-phase and four-line neutral ground
Or the failures such as ground connection, overcurrent, short circuit, phase shortage and overvoltage of electrical equipment are protected, prevented also from electric wiring or electrically
Equipment occurs earth fault and causes electrical fire and electrical equipment damage accident, may further be used to provide personal Danger Electric shock risk indirect
Contact protection.
Currently, the major loop in residual current circuit breaker mostly uses greatly flat copper plate as current-carrying part, but due to structure
Limitation, copper coin can be processed to various polymorphic structures according to demand, and this will necessarily be caused that stock utilization is low, processing cost
High, the problems such as depot storage capacity is low, it is added significantly to material and production cost.
Chinese utility model patent CN203367195U discloses a kind of new pattern creepage breaker zero sequence current mutual inductor conductor,
Including insulating boot, three mutually isolated chambers are divided into the insulating boot, installation the right and left and intermediate is respectively used to and leads
Body.The utility model can be by three mutually isolated chambers in insulating boot, by each phase conductor respectively every loaded on three independences
Chamber in, realize conductor between insulation protection.But there is also following deficiencies：A. the shape and structure of conductor is complicated, needs
The multiple bending of tablet, stock utilization is wanted to only have 30%-50%, processing and material cost are high；B. conductor passes through zero-sequence current mutual
Sensor arrangement is unbalanced, causes Distribution of Magnetic Field uneven, and residual current is larger, when especially circuit overloads, residual current
Breaker is easy malfunction.
Wherein, conductor (including A phase conductors 101, B phase conductors 102, C phase conductors 103 and the N phase conductors that the prior art uses
104) the section arrangement at zero sequence current mutual inductor is passed through to be generally mode shown in Fig. 1 a, A phase conductors 101, B phase conductors
The section of 102 and C phase conductors 103 is platypelloid type, and the conductor in platypelloid type section will produce the magnetic field that equal magnetic surfaces are ellipse, should
Distribution of Magnetic Field is uneven；B phase conductors 102 are big compared with A phase conductors 101, C phase conductors 103 with a distance from iron core 100, and position is not
It is balanced.And residual current increases with the increase of conductor offset distance (when primary side three-phase current does not have in equilibrium state
When having zero-sequence current generation, secondary side generates a small induced current due to shape and position etc., this induced electricity
Stream is residual current), when A phase conductors 101, B phase conductors 102,103 three-phase of C phase conductors apply as shown in Figure 1 b one respectively
Secondary balanced balanced current IA、IB、ICWhen, three-phase conductor will generate induced field δ as illustrated in figure 1 c in iron core 100 respectivelyA、δB、δC,
Thus residual current is generated.This residual current can have certain probability and switch is caused to be judged by accident, cause to switch malfunction.And in identical knot
Under structure, residual current can increase with the increase of primary current.So when overload occurs, the probability of prior art malfunction
It will be significantly increased, and greatly reduce the reliability of product.
Invention content
The object of the present invention is to provide a kind of major loops for residual current circuit breaker, and Distribution of Magnetic Field is uniformly reasonable,
Switch malfunction risk can be greatly reduced, stock utilization is high, securely and reliably, simple process and low cost.
Following technical proposal can be used to realize in the above-mentioned purpose of the present invention：
The present invention provides a kind of major loop for residual current circuit breaker, wherein described to be used for residual current circuit breaker
Major loop include：Conductive part comprising at least two phase conductors, mutually insulated, at least a phase institute between each line conductor
Line conductor is stated to be made of two metallic conductors；Current Mutual Inductance portion comprising zero sequence current mutual inductor, the zero sequence current mutual inductor
Through equipped with endoporus, each line conductor separation is arranged in the endoporus, and each line conductor of the endoporus is passed through to generate
Field homogeneity distribution.
In a preferred embodiment, the major loop for residual current circuit breaker further includes insulating part, described exhausted
Edge part is set in the endoporus, and line conductor described in each phase passes through insulating part setting spaced apart.
In a preferred embodiment, the insulating part includes cylindrical shape reinforcer and multiple insulation boards, it is multiple it is described absolutely
Listrium is circumferentially equally spaced to be fixedly arranged on the cylindrical shape reinforcer, multiple insulation boards from the cylindrical shape reinforcer it is radial to
Outgoing, which is casually arranged with, sets.
In a preferred embodiment, the line conductor of the conductive part is firewire conductor, and each firewire conductor wraps
Two metallic conductors are included, each firewire conductor is arranged at equal intervals along the circumferential edge of the endoporus.
In a preferred embodiment, the line conductor of the conductive part includes a neutral conductor and an at least firewire conductor,
The firewire conductor includes two metallic conductors.
In a preferred embodiment, the neutral conductor is two metallic conductors being arranged in parallel, and each firewire is led
Body and the neutral conductor are arranged at equal intervals along the circumferential edge of the endoporus.
In a preferred embodiment, the neutral conductor is a metallic conductor, and the neutral conductor is located in described
The center in hole, each firewire conductor are arranged at equal intervals along the circumferential edge of the endoporus.
In a preferred embodiment, the Current Mutual Inductance portion further includes protective current mutual inductor, and the firewire conductor is worn
The one end for going out the zero sequence current mutual inductor is arranged in a protective current mutual inductor.
In a preferred embodiment, the metallic conductor outer wrapping insulating layer of line conductor described in each phase.
In a preferred embodiment, the cross sectional shape of the metallic conductor of the line conductor is round, semicircle or square
Shape；The metallic conductor of the line conductor is made of aluminum or copper.
The present invention be used for residual current circuit breaker major loop the characteristics of and advantage be：
By the present invention in that each line conductor equilibrium arrangement of the endoporus across zero sequence current mutual inductor, makes each line conductor generate
Field homogeneity distribution, improve the faradic accuracy of zero sequence current mutual inductor, reduce the malfunction of residual current circuit breaker,
Simple in structure, stock utilization is high, at low cost.
Description of the drawings
The following drawings is only intended in doing schematical explanation and illustration to the present invention, not to limit the present invention model
It encloses.
Fig. 1 a are the structural schematic diagram that conductor in the prior art passes through zero sequence current mutual inductor.
Fig. 1 b are primary current polar plot.
Fig. 1 c are induced field polar plot.
Fig. 2 is the dimensional structure diagram of the first embodiment of the present invention.
Fig. 3 is the dimensional structure diagram of the conductive part of the first embodiment of the present invention.
Fig. 4 is the dimensional structure diagram of the A phase firewire conductors of the conductive part of the first embodiment of the present invention.
Fig. 5 is the dimensional structure diagram of the B phase firewire conductors of the conductive part of the first embodiment of the present invention.
Fig. 6 is the dimensional structure diagram of the C phase firewire conductors of the conductive part of the first embodiment of the present invention.
Fig. 7 is the dimensional structure diagram of the N phase neutral conductors of the conductive part of the first embodiment of the present invention.
Fig. 8 is the dimensional structure diagram in the Current Mutual Inductance portion of the first embodiment of the present invention.
Fig. 9 is the dimensional structure diagram of the insulating part of the first embodiment of the present invention.
Figure 10 is the schematic cross-section at the zero sequence current mutual inductor in the Current Mutual Inductance portion of the first embodiment of the present invention.
Figure 11 is the schematic cross-section at the zero sequence current mutual inductor in the Current Mutual Inductance portion of the second embodiment of the present invention.
Drawing reference numeral explanation：
The prior art
100, iron core；101, A phase conductors；102, B phase conductors；103, C phase conductors；104, N phase conductors；IA, electric current；IB, electricity
Stream；IC, electric current；δA, induced field；δB, induced field；δC, induced field；
The present invention
1, conductive part；
11, A phase firewires conductor；111, metallic conductor；112, metallic conductor；
12, B phase firewires conductor；121, metallic conductor；122, metallic conductor；
13, C phase firewires conductor；131, metallic conductor；132, metallic conductor；
14, neutral conductor；141, metallic conductor；142, metallic conductor；
15, plate is crimped；16, plate is crimped；17, plate is crimped；18, plate is crimped；
2, Current Mutual Inductance portion；21, zero sequence current mutual inductor；22, A phases protective current mutual inductor；23, B phases protective current is mutual
Sensor；24, C phases protective current mutual inductor；25, endoporus；
3, insulating part；31, cylindrical shape reinforcer；32, insulation board.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figures 2 to 11, the present invention provides a kind of major loop for residual current circuit breaker comprising：It is conductive
Portion 1 comprising at least two phase conductors, mutually insulated between each line conductor, line conductor described in an at least phase is by two gold
Belong to conductor composition；Current Mutual Inductance portion 2 comprising zero sequence current mutual inductor 21, the zero sequence current mutual inductor 21 run through equipped with interior
Hole 25, each line conductor separation are arranged in the endoporus 25, the magnetic for passing through each line conductor of the endoporus 25 to generate
Field is uniformly distributed.
Specifically, mutually insulated between each line conductor of conductive part 1 is kept away with ensureing that each line conductor transmits electric signal respectively
Exempt from phase fault, each line conductor is first bent by predetermined size, then punch forming, and is carried out after the completion to line conductive surface
Anti-oxidation processing, the end of line conductor are fastened by two crimping plate crimping by screw, realize connection；Zero-sequence current is mutual
For sensor 21 for measuring residual current, each line conductor is equally distributed to pass through endoporus, to ensure that field homogeneity is distributed, improves zero sequence
The faradic accuracy of current transformer, reduces the malfunction of residual current circuit breaker.
Further, the major loop for residual current circuit breaker further includes insulating part 3, and the insulating part 3 is set to
In the endoporus 25, line conductor described in each phase is by 3 setting spaced apart of the insulating part, to pass through the setting of insulating part 3, reality
Now uniform dielectric separation between each phase conductor is conducive to the field homogeneity generated distribution, wherein insulating part 3 can pass through setting
Support construction separates each phase conductor, and winding high-temperature insulation adhesive tape then can be used in remaining exposed part of each phase conductor
Mode insulate, to effectively prevent phase fault.
Further, as shown in Figures 9 to 11, the insulating part 3 includes cylindrical shape reinforcer 31 and multiple insulation boards
32, multiple insulation boards 32 it is circumferential it is equally spaced be fixedly arranged on the cylindrical shape reinforcer 31, multiple insulation boards 32 are from institute
It states cylindrical shape reinforcer 31 and radially outward dissipates setting, specifically, cylindrical shape reinforcer 31 is substantially cylindrical in shape, insulation board 32 is substantially
In tabular, the periphery wall for being fixedly arranged on cylindrical shape reinforcer 31 of one end axial direction of insulation board 32, the other end energy of insulation board 32
It is in contact with the inner wall of endoporus 25, with by insulating part 3, by region centered on the region segmentation in endoporus 25 and multiple fan sections
Domain, central area are the region inside cylindrical shape reinforcer 31, and sector region is adjacent two-by-two insulation board 32, endoporus 25
Inner wall and the periphery wall of cylindrical shape reinforcer 31 between enclose the region set, each line conductor is separated and each line conductor is made to produce
Raw equally distributed magnetic field.
In one embodiment, the line conductor of the conductive part 1 is firewire conductor, i.e., conductive part 1 includes that at least two-phase is fiery
Line conductor, each firewire conductor include two metallic conductors, and two metallic conductors, which are bent from terminals to leading-out terminal, to be prolonged
It stretches, and is positioned as close to, to save space, both improve stock utilization, reduce processing cost, and ensure the biography of high current
It passs, each firewire conductor is arranged at equal intervals along the circumferential edge of the endoporus 25, wherein each firewire conductor can pass through insulating part 3
Each insulation board 32 separate, not only ensured being uniformly distributed for magnetic field, but also avoid short circuit.
In another embodiment, the line conductor of the conductive part 1 includes a neutral conductor and an at least firewire conductor, described
Firewire conductor includes two metallic conductors, and as shown in Figure 10, the neutral conductor can be two metallic conductors being arranged in parallel, respectively
The firewire conductor and the neutral conductor are arranged at equal intervals along the circumferential edge of the endoporus 25, i.e., each firewire conductor and zero curve
Conductor is separated by each insulation board 32 of insulating part 3, and as shown in figure 11, the neutral conductor is alternatively a metallic conductor,
The neutral conductor is located at the center of the endoporus 25, i.e. neutral conductor is arranged in the cylindrical shape reinforcer 31 of insulating part 3, respectively
The firewire conductor is arranged at equal intervals along the circumferential edge of the endoporus 25, i.e., each firewire conductor is separated by each insulation board 32.
Further, as shown in figure 8, the Current Mutual Inductance portion further includes protective current mutual inductor, the firewire conductor is worn
The one end for going out the zero sequence current mutual inductor 21 is arranged in a protective current mutual inductor, wherein protective current mutual inductor is used
In measuring phase line current, each firewire conductor is pierced by a protective current mutual inductor, to carry out electric current to each firewire conductor respectively
Measurement and protection.
Further, the metallic conductor outer wrapping insulating layer of line conductor described in each phase, to realize that the metal of each line conductor is led
It is insulated from each other between body, avoid short circuit.
Further, the cross sectional shape of the metallic conductor of the line conductor is round, semicircle or square, compared to existing
For having plate shaped in technology, be conducive to processing bending；The metallic conductor of the line conductor is made of aluminum or copper, when it is by aluminium
When being made, both ends prevent the process of galvanic effect.
Specific structure and processing installation instructions are carried out by taking a preferred embodiment as an example below (as shown in Fig. 2 to Figure 10)：
Conductive part 1 includes three-phase firewire conductor and a phase neutral conductor, i.e. conductive part 1 includes A phase firewires conductor 11, B phases
Firewire conductor 12, C phase firewires conductor 13 and N phases neutral conductor 14, A phase firewires conductor 11, B phase firewires conductor 12, C phase firewires are led
Body 13 and N phases neutral conductor 14 are arranged side by side, and it is leading-out terminal that one end, which is end of incoming cables one end, and A phase firewires conductor 11 includes metal
Conductor 111 and metallic conductor 112 (as shown in Figure 4), metallic conductor 111 and the first horizontal Tile setting of metallic conductor 112 are vertical again
It is arranged side by side, the cross section of the two is identical, i.e., metallic conductor 111 is identical with the shape of metallic conductor 112, and B phase firewires are led
Body 12 includes metallic conductor 121 and metallic conductor 122 (as shown in Figure 5), 122 horizontal Tile of metallic conductor 121 and metallic conductor
Setting, C phase firewires conductor 13 include that metallic conductor 131 and metallic conductor 132 (as shown in Figure 6), metallic conductor 131 and metal are led
The shape of body 132 is similar with the shape of metallic conductor 111 and metallic conductor 112, and N phases neutral conductor 14 includes metallic conductor 141
Shape with metallic conductor 142 (as shown in Figure 7), the two is also that part is identical, and Current Mutual Inductance portion 2 includes zero sequence current mutual inductor
21, A phases protective current mutual inductor 22, B phase protective currents mutual inductor 23 and C phase protective currents mutual inductor 24, A phase protective currents are mutual
Sensor 22, B phase protective currents mutual inductor 23 and the setting of the interval of C phase protective currents mutual inductor 24 and conllinear, zero sequence current mutual inductor
21 are arranged with A phase protective currents mutual inductor 22, B phase protective currents mutual inductor 23 and 24 parallel interval of C phase protective currents mutual inductor,
Insulating part 3 includes a cylindrical shape reinforcer 31 and four insulation boards 32.
When processing installation：First, bending is carried out to the metallic conductor of each phase conductor, end is clapped and is surface-treated
Processing, and be attached by crimping plate and bolt, specifically by the metallic conductor 111 and metallic conductor of A phase firewires conductor 11
112, the metallic conductor 131 and metal of the metallic conductor 121 of B phase firewires conductor 12 and metallic conductor 122, C phase firewires conductor 13
The metallic conductor 141 and metallic conductor 142 of conductor 132 and N phases neutral conductor 14 are bent according to regulation size, and end is clapped
It is flat, then punch forming, anti-oxidation processing is carried out to its surface after the completion；Then, plate 15 is crimped, crimping plate 17 is made of copper, table
Face carries out tin plating or silver-plated process, and crimping plate 16, crimping plate 18 are fabricated from iron, and surface carries out antirust processing of rust removing, will crimp plate
17 are put into the tooling that screws, and smear conductive paste on crimping plate 17, are then placed in metallic conductor 111 and metallic conductor 112, then
It is put into crimping plate 18 to push down, is used in combination two screws of M6 × 20 to be fastened, realizes the connection of the leading-out terminal of A phase firewires conductor 11,
Similarly, B phase firewires conductor 12, C phase firewires conductor 13 are connected with the leading-out terminal of N phases neutral conductor 14 with identical method, and N
The end of incoming cables of phase neutral conductor 14 is also attached with identical method；
Then, A phase firewires conductor 11, B phase firewires conductor 12, C phase firewires conductor 13 and N phases neutral conductor 14 are passed through zero
Sequence current transformer 21, and it is uniformly distributed arrangement, it realizes that unanimously guarantee respectively balances each other from relative distance, position, makes primary
The magnetic field that electric current generates in silicon steel sheet can cancel out each other, from principle by because primary side conductor layout does not conform to and and generate
Residual current is minimized, and avoids the malfunction of residual current circuit breaker, and makes A phase firewires conductor 11, B phase firewires conductor 12, C
Phase firewire conductor 13 is corresponded to across A phase protective currents mutual inductor 22, B phase protective currents mutual inductor 23 and C phase protective currents respectively
Then mutual inductor 24 smears conductive paste, and combine crimping plate 16 by metallic conductor 111 and metallic conductor 112 on crimping plate 15
The other end push down, the fastening of screw of M8 × 16 is used in combination, to pass through the main electricity of screw (or bolt) and residual current circuit breaker
Road is attached, and similarly, the terminals of B phase firewires conductor 12, C phase firewires conductor 13 is attached and breaking with residual current
The main circuit of device is attached；
Finally, the pressure of insulating part 3 is set into embedded A phase firewires conductor 11, B phase firewires conductor 12, C phase firewires conductor 13 and N phases
In gap between neutral conductor 14, realize that each alternate insulating effect, four insulation boards 32 are divided into four parts of sector regions, two-by-two
One phase conductor is set between insulation board 32, and cylindrical shape reinforcer 31 can ensure that intensity and the positioning of insulating part 3.
Certainly, in a further preferred embodiment, as shown in figure 11, connection type is same as described above, the difference is that
The bending shape of each phase conductor is different, N phases neutral conductor 14 only includes a metallic conductor and insulating part 3 includes a circle
Endoporus 25 is divided into three sector regions and a central circular, N phase zeros by tubular reinforcer 31 and three insulation boards 32
Line conductor 14 is passed through out of cylindrical shape reinforcer 31, and three-phase firewire conductor is passed through from a sector region respectively.
By the present invention in that each line conductor equilibrium arrangement of the endoporus 25 across zero sequence current mutual inductor 21, makes each line conductor
The field homogeneity of generation is distributed, and is improved 21 faradic accuracy of zero sequence current mutual inductor, is reduced residual current circuit breaker
Malfunction.And firewire conductor can be made of the metallic conductor of two shapes not quite identical (namely shape is identical), it is both full
Sufficient high current demand, and it is avoided that difficulty of processing, neutral conductor can be also made of two not quite identical metallic conductors of shape,
Also it can be made of a metallic conductor, and cross-sectional area of conductor shape for classic flat-plate bending, can be carried substantially using circle
The utilization rate (stock utilization is up to 95% or more) of high material simplifies processing technology, simple in structure, at low cost.
The above is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, has in any technical field
Usual skill, in the range of not departing from technical solution of the present invention, when the technology contents using the disclosure above make it is a little
The equivalent embodiment of equivalent variations is changed or is modified to, as long as being the content without departing from technical solution of the present invention, according to the present invention
Technical spirit to any simple modification, equivalent change and modification made by above example, still fall within the technology of the present invention side
In the range of case.
Claims (10)
1. a kind of major loop for residual current circuit breaker, which is characterized in that the master for residual current circuit breaker returns
Road includes：
Conductive part comprising at least two phase conductors, mutually insulated between each line conductor, line conductor described in an at least phase by
Two metallic conductor compositions；
Current Mutual Inductance portion comprising zero sequence current mutual inductor, the zero sequence current mutual inductor, which runs through, is equipped with endoporus, and each line is led
Body interval is arranged in the endoporus, the field homogeneity distribution for passing through each line conductor of the endoporus to generate.
2. the major loop according to claim 1 for residual current circuit breaker, which is characterized in that described for remaining electricity
The major loop for flowing breaker further includes insulating part, and the insulating part is set in the endoporus, and line conductor described in each phase passes through described
Insulating part setting spaced apart.
3. the major loop according to claim 2 for residual current circuit breaker, which is characterized in that the insulating part includes
Cylindrical shape reinforcer and multiple insulation boards, multiple insulation boards are circumferentially equally spaced to be fixedly arranged on the cylindrical shape reinforcer, more
A insulation board radially outward dissipates setting from the cylindrical shape reinforcer.
4. the major loop according to claim 1 for residual current circuit breaker, which is characterized in that the line of the conductive part
Conductor is firewire conductor, and each firewire conductor includes two metallic conductors, and each firewire conductor is along the endoporus
Circumferential edge is arranged at equal intervals.
5. the major loop according to claim 1 for residual current circuit breaker, which is characterized in that the line of the conductive part
Conductor includes a neutral conductor and an at least firewire conductor, and the firewire conductor includes two metallic conductors.
6. the major loop according to claim 5 for residual current circuit breaker, which is characterized in that the neutral conductor is
Two metallic conductors being arranged in parallel, each firewire conductor and the neutral conductor along the endoporus circumferential edge at equal intervals
Setting.
7. the major loop according to claim 5 for residual current circuit breaker, which is characterized in that the neutral conductor is
A piece metallic conductor, the neutral conductor are located at the center of the endoporus, peripheral edge of each firewire conductor along the endoporus
Edge is arranged at equal intervals.
8. the major loop according to claim 4 or 5 for residual current circuit breaker, which is characterized in that the electric current is mutual
Sense portion further includes protective current mutual inductor, and one end that the firewire conductor is pierced by the zero sequence current mutual inductor is arranged in described in one
Protective current mutual inductor.
9. the major loop according to claim 1 for residual current circuit breaker, which is characterized in that line conductor described in each phase
Metallic conductor outer wrapping insulating layer.
10. the major loop according to claim 1 for residual current circuit breaker, which is characterized in that the line conductor
The cross sectional shape of metallic conductor is round, semicircle or square；The metallic conductor of the line conductor is made of aluminum or copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810527147.4A CN108493062A (en) | 2018-05-29 | 2018-05-29 | Major loop for residual current circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810527147.4A CN108493062A (en) | 2018-05-29 | 2018-05-29 | Major loop for residual current circuit breaker |
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| CN108493062A true CN108493062A (en) | 2018-09-04 |
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| CN201810527147.4A Pending CN108493062A (en) | 2018-05-29 | 2018-05-29 | Major loop for residual current circuit breaker |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110071019A (en) * | 2019-04-19 | 2019-07-30 | 苏州高鹏光电科技有限公司 | A kind of high integration Intelligent air ON signal acquisition device |
| CN113410103A (en) * | 2020-03-17 | 2021-09-17 | 北京京人电器有限公司 | Plastic casing type circuit breaker |
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