CN207303021U - A kind of breaker of plastic casing with powerful disjunction short circuit current flow ability - Google Patents
A kind of breaker of plastic casing with powerful disjunction short circuit current flow ability Download PDFInfo
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- CN207303021U CN207303021U CN201721058454.XU CN201721058454U CN207303021U CN 207303021 U CN207303021 U CN 207303021U CN 201721058454 U CN201721058454 U CN 201721058454U CN 207303021 U CN207303021 U CN 207303021U
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- Prior art keywords
- breaker
- short circuit
- static contact
- current flow
- circuit current
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
A kind of breaker of plastic casing with powerful disjunction short circuit current flow ability, composition includes shell, static contact, moving contact and insulation arc-control device, the insulation arc-control device includes yoke, support base, torsional spring, armature and an insulating shroud without antetheca, and the yoke is fixed on static contact；The support base is fixed on the lower part of yoke；Gap between the top plate of an insulating shroud and dynamic and static contact is corresponding, and the two side walls of an insulating shroud are rotatablely connected by the shaft through torsional spring and support base；One end of the torsional spring is hung on the side wall of an insulating shroud, and the other end is pressed on support base；The armature is fixed on the rear wall of an insulating shroud.An insulating shroud of the utility model rapidly can cover static contact in breaker disjunction short circuit current flow, make the arc extinction between dynamic and static contact, thus shorten the amplification time of arc energy, the short arcing of breaker is realized or without arcing, so as to substantially increase the ability of breaker disjunction short circuit current flow.
Description
Technical field
A kind of breaker of plastic casing with strong short circuit current flow breaking capacity is the utility model is related to, belongs to switching technique neck
Domain.
Background technology
Moulded case circuit breaker (MCCB) is the industrial important electric elements with civilian low-voltage distribution apparatus, is used as more
The branch switch of low-voltage distribution system protection.Wherein short trouble protection is its most important function, line during due to short trouble
The short circuit current flow on road is very big, breaker can be produced between its dynamic and static contact in disjunction short circuit current flow the very big grade of energy from
Daughter electric arc, only could be rapidly by arc extinction by default arc-extinguishing unit, and breaker could complete disjunction short circuit electricity
The task of stream.
At present, domestic and international MCCB using arc-chutes technology to disjunction short circuit current flow when caused high temperature and pressure electric arc into
Row cooling and extinguishing, the arc quenching principle of this technology are：During disjunction short circuit current flow, treat to produce electric arc between dynamic and static contact and draw
After growing to the corresponding amplification of certain length, energy, arc-chutes are entered using magnetic field electro-dynamic force or other means driving high energy arc, are made
Extinguish under the cooling effect of its metal grid in arc-chutes.The arc quenching effect of this method is subject to such as arc-chutes material, touches
Head cut-offs the influence of the factors such as speed, clearance between open contacts, contact material, especially for the breaker of single-break structure, its disjunction
The ability of short circuit current flow is poor, be usually no more than exchange 400V, 50kA, and direct-current short circuit electric current due to no zero passage process more
It is not easy disjunction.
With the raising that the construction and development and people of power grid require electric network reliability, a kind of new go out objectively is needed
Arc scheme, to greatly improve the ability of MCCB disjunction short circuit current flows.
Utility model content
The purpose of this utility model is that the drawback for the prior art, there is provided one kind has powerful disjunction short circuit current flow energy
The breaker of plastic casing of power, to improve the breaking capacity of short circuit current flow.
Problem described in the utility model is realized with following technical proposals：
A kind of breaker of plastic casing with powerful disjunction short circuit current flow ability, including shell, static contact, moving contact, dropout
Mechanism and arc-chutes, insulation arc-control device is further included in composition, and the insulation arc-control device includes yoke, support base, torsional spring, rank
Iron and an insulating shroud without antetheca, the yoke are fixed on the static contact of breaker and are located at dynamic and static contact face
Lower section；The support base is fixed on static contact and positioned at the lower part of yoke；Between an insulating shroud and dynamic and static contact
Gap it is corresponding, an insulating shroud passes through the shaft through torsional spring centre bore and support base and is rotatablely connected；The one of the torsional spring
In an insulating shroud, the other end is pressed on the fixed pin on support base side pressure；The armature is fixed in an insulating shroud simultaneously
It is corresponding with yoke.
The above-mentioned breaker of plastic casing with powerful disjunction short circuit current flow ability, an insulating shroud are semi-closed structure,
Linked together and formed by top plate, two side walls and rear wall, front opening, the top plate of an insulating shroud and dynamic and static contact
Between gap it is corresponding, the armature is fixed on the rear wall of an insulating shroud and corresponding with yoke.
The above-mentioned breaker of plastic casing with powerful disjunction short circuit current flow ability, the axis of the shaft connect with dynamic and static contact
The perpendicular bisector of contacting surface intersects vertically.
The above-mentioned breaker of plastic casing with powerful disjunction short circuit current flow ability, the rear wall of an insulating shroud, which is equipped with, to be led to
Air holes.
The above-mentioned breaker of plastic casing with powerful disjunction short circuit current flow ability, is equipped with insulation between the yoke and static contact
Backing plate.
The above-mentioned breaker of plastic casing with powerful disjunction short circuit current flow ability, the torsional spring and shaft are respectively provided with two, it
Be symmetrically mounted on the both sides of support base.
The above-mentioned breaker of plastic casing with powerful disjunction short circuit current flow ability, arc-chutes are additionally provided with the shell and magnetic is protected
Protect buckle releaser.
The above-mentioned breaker of plastic casing with powerful disjunction short circuit current flow ability, an insulating shroud pass through screw with armature
It is fixed as one.
The utility model is additionally arranged an insulating shroud, an insulating shroud can breaker disjunction short circuit current flow moment it is rapid
Between action, insertion moving contact and static contact, make arc extinction or the reduction just produced between dynamic and static contact, thus
The amplification time of arc energy is shortened, reduces gathering for arc energy, realizes the short arcing of breaker or without arcing.This
Utility model takes two-stage arc extinguishing, and the electric arc after initial stage an insulating shroud auxiliary extinction of arc can be introduced into after arc-chutes continue
Continuous arc extinguishing operation, so as to substantially increase the arc extinguishing ability of breaker, also substantially increases breaker disjunction short circuit current flow
Ability.
Brief description of the drawings
Fig. 1 is the "on" position schematic diagram of the utility model；
Fig. 2 is the view when contact reprimand of the utility model is opened；
Fig. 3 is the gate-dividing state schematic diagram of the utility model；
Fig. 4 is the structure diagram of insulation arc-control device；
Fig. 5 is C-C sectional views；
Fig. 6 is the structure diagram of support base；
Fig. 7 is the structure diagram of an insulating shroud and armature.
Each list of reference numerals is in figure：1st, static contact；2nd, moving contact；3rd, an insulating shroud；3-1, armature；4th, yoke；5th, prop up
Support seat；5-1, shaft；5-2, fixed pin；6th, torsional spring；7th, screw；8th, insulating pad；9th, handle；10th, magnetic protection buckle releaser；10-
1st, tripping mechanism；11st, arc-chutes；12nd, shell；A, axis pin.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.
The utility model is that an insulation arc-control device driven by electromagnetic force is installed at the static contact position of original MCCB,
In the moment that short trouble occurs, the not yet full opening of electric arc lag phase (energy not yet amplifies) of the dynamic and static contact of breaker,
While dynamic and static contact is opened by electrodynamic repulsion force reprimand, an insulating shroud is covered on the static contact of breaker.Using insulation shielding side
Formula extinguishes electric arc, so that the ability of breaker disjunction short circuit current flow greatly improved.
Referring to Fig. 1~Fig. 7, the utility model mainly includes static contact 1, the moving contact being installed in engineering plastics shell 12
2nd, magnetic protection buckle releaser 10, tripping mechanism 10-1, insulation arc-control device, arc-chutes 11 and handle 9.Wherein, insulate interrupter cartridge
Put including be arranged on 1 position of static contact an insulating shroud 3, armature 3-1, yoke 4, support base 5, shaft 5-1, fixed pin 5-2,
Torsional spring 6 and insulating pad 8.
An insulating shroud 3 and armature 3-1 is an assembly, under normal circumstances, the combination of an insulating shroud 3 and armature 3-1
Body moves clockwise to open mode (Fig. 1 positions), the right side of an insulating shroud 3 at dynamic and static contact under the action of torsional spring 6
Side, an insulating shroud 3 can overcome the elastic force of torsional spring 6 under external force using the shaft 5-1 on support base 5 as axial left swing
It is dynamic.When short-circuit current occurs in circuit, due to static contact 1 with 2 current direction of moving contact on the contrary, therefore producing electrodynamic repulsion force
By static contact 1 and moving contact 2, quickly reprimand opens (moving contact 2 is swung up using axis pin A as axis), while yoke 4 is magnetized by electromagnetic field
Very big suction is produced to armature 3-1 afterwards, the assembly of an insulating shroud 3 and armature 3-1 overcomes the elastic force of torsional spring 6 with shaft 5-
1 rotates counterclockwise for axis, and the top plate of an insulating shroud 3 is rapidly inserted into dynamic and static while dynamic and static contact is opened by electrodynamic repulsion force reprimand
Between contact (Fig. 2 positions), play the role of rapid insulation shielding arc extinguishing, at the same time, the magnetic protection buckle releaser 10 of MCCB pushes away
Dynamic its switch trip mechanism 10-1 actions, moving contact 2 and the static contact 1 of switch are opened completely, complete the short circuit breaking mistake of MCCB
Journey.Afterwards since short circuit current flow is cut off, strong-electromagnetic field disappears, the homing under the elastic force effect of torsional spring 6 of an insulating shroud 3
(Fig. 3 positions).
Rotating hinge chain type repulsion structure is used between static contact 1 and moving contact 2.The metal strip of static contact 1 includes at least one
Section flat segments parallel with moving contact, the current direction in 1 flat segments of static contact and moving contact 2 is on the contrary, 1 flat segments of static contact
Length produce when being more than or equal to short circuit current flow in moving contact and static contact and make the repulsion that dynamic and static contact repels each other out required for
Length.Insulating pad 8 prevents electric current from directly being flowed into from 4 short circuit of lower end yoke.When an error occurs, the opposite short circuit electricity in direction
When stream flows through static contact flat segments and moving contact, electrodynamic repulsion force is produced between static contact 1 and moving contact 2 so that moving contact 2 with
Axis pin A denounces out rotationally clockwise for axis.
The utility model is equipped with ventilation hole on the rear wall of an insulating shroud, it is therefore an objective between isolation dynamic/static contact is ensured
While electric arc, the resistance in an insulating shroud movement is reduced to the greatest extent.The gross area of each ventilation hole accounts for the 30%- of the rear wall gross area
50%.The wall thickness of an insulating shroud is 2-5 millimeters.In the lower sidewall of an insulating shroud and rear wall lower part close to the side of arc-chutes
To through hole is provided with, arc-chutes are led to pilot arc.
An insulating shroud 3 is using high intensity, heat safe engineering plastic materials.It can ensure effectively to divide as defined in product standard
The number (most 3 times) of disconnected short circuit current flow.
Improve and reduce 11 Capacity design of arc-chutes, extinguish remaining electric arc for cooling down；Handle 9 is installed on shell 12
End, for normal occlusion sub-switching operation.
The arc-control device that insulate forms two-stage arc-control device with arc-chutes 11, and insulation arc-control device is not yet complete in dynamic and static contact
Arc extinguishing during full opening, and arc-chutes 11 are then to have good extinguishing remnants arcings after dynamic and static contact is opened completely.
Since MCCB uses above technical scheme, following technological progress can be obtained：
1 can greatly improve the ability of product disjunction short circuit current flow；
2. it can achieve the purpose that AC and DC is general；
3. in disjunction failed shorted electric current, the further expansion of arc energy can be limited, so that the short of product can be realized
Arcing or without arcing.
Claims (8)
1. a kind of breaker of plastic casing with powerful disjunction short circuit current flow ability, including shell, static contact, moving contact, dropout machine
Structure and arc-chutes, it is characterized in that, the insulation arc-control device in shell (12), the insulation interrupter cartridge are further included in composition
Put including yoke (4), support base (5), torsional spring (6), armature (3-1) and an insulating shroud (3) without antetheca, the yoke
(4) it is fixed on static contact (1) and positioned at the lower section in dynamic and static contact face；The support base (5) is fixed on static contact (1)
Go up and be located at the lower part of yoke (4)；An insulating shroud (3) is corresponding with the gap between dynamic and static contact, an insulating shroud
(3) it is rotatablely connected by the shaft (5-1) through torsional spring (6) centre bore and support base (5)；One end of the torsional spring (6) is hung over
In an insulating shroud (3), the other end is pressed on the fixed pin (5-2) on support base (5)；The armature (3-1) is fixed on insulation
It is on shielding case (3) and corresponding with yoke (4).
2. the breaker of plastic casing according to claim 1 with powerful disjunction short circuit current flow ability, it is characterized in that, it is described exhausted
Edge shielding case (3) is semi-closed structure, is linked together and formed by top plate, two side walls and rear wall, front opening, the insulation
Gap between the top plate of shielding case and dynamic and static contact is corresponding, after the armature (3-1) is fixed on an insulating shroud (3)
It is on wall and corresponding with yoke (4).
3. the breaker of plastic casing according to claim 2 with powerful disjunction short circuit current flow ability, it is characterized in that, described turn
The axis of axis (5-1) and the perpendicular bisector in dynamic and static contact face intersect vertically.
4. the breaker of plastic casing according to claim 3 with powerful disjunction short circuit current flow ability, it is characterized in that, the magnetic
Insulating pad (8) is equipped between yoke (4) and static contact (1).
5. the breaker of plastic casing according to claim 4 with powerful disjunction short circuit current flow ability, it is characterized in that, it is described exhausted
The rear wall of edge shielding case (3) is equipped with ventilation hole.
6. the breaker of plastic casing according to claim 5 with powerful disjunction short circuit current flow ability, it is characterized in that, the torsion
Spring (6) and shaft (5-1) are respectively provided with two, they are symmetrically mounted on the both sides of support base (5).
7. the breaker of plastic casing according to claim 6 with powerful disjunction short circuit current flow ability, it is characterized in that, it is described outer
Arc-chutes (11) and magnetic protection buckle releaser (10), tripping mechanism (10-1) are additionally provided with shell (12).
8. the breaker of plastic casing according to claim 7 with powerful disjunction short circuit current flow ability, it is characterized in that, it is described exhausted
Edge shielding case (3) is fixed as one with armature (3-1) by screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721058454.XU CN207303021U (en) | 2017-08-23 | 2017-08-23 | A kind of breaker of plastic casing with powerful disjunction short circuit current flow ability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721058454.XU CN207303021U (en) | 2017-08-23 | 2017-08-23 | A kind of breaker of plastic casing with powerful disjunction short circuit current flow ability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207303021U true CN207303021U (en) | 2018-05-01 |
Family
ID=62443468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721058454.XU Expired - Fee Related CN207303021U (en) | 2017-08-23 | 2017-08-23 | A kind of breaker of plastic casing with powerful disjunction short circuit current flow ability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207303021U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107342198A (en) * | 2017-08-23 | 2017-11-10 | 河北宝凯电气股份有限公司 | A kind of breaker of plastic casing with powerful disjunction short circuit current ability |
-
2017
- 2017-08-23 CN CN201721058454.XU patent/CN207303021U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107342198A (en) * | 2017-08-23 | 2017-11-10 | 河北宝凯电气股份有限公司 | A kind of breaker of plastic casing with powerful disjunction short circuit current ability |
| CN107342198B (en) * | 2017-08-23 | 2020-01-14 | 河北宝凯电气股份有限公司 | Moulded case circuit breaker with powerful disconnected short-circuit current ability of breaking |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180501 Termination date: 20200823 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |