CN107359068A - A kind of breaker of plastic casing with compound arc extinction performance - Google Patents
A kind of breaker of plastic casing with compound arc extinction performance Download PDFInfo
- Publication number
- CN107359068A CN107359068A CN201710727710.8A CN201710727710A CN107359068A CN 107359068 A CN107359068 A CN 107359068A CN 201710727710 A CN201710727710 A CN 201710727710A CN 107359068 A CN107359068 A CN 107359068A
- Authority
- CN
- China
- Prior art keywords
- support base
- arc
- static contact
- breaker
- insulation
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/32—Insulating body insertable between contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
A kind of breaker of plastic casing with compound arc extinction performance, including the static contact in shell, the moving contact being connected with tripping mechanism and insulation arc-control device, the insulation arc-control device includes yoke, armature, insulation shielding plate, swing rod and support base, the yoke and support base are each attached on static contact, and support base is located at the lower section of yoke；The insulation shielding plate is located at the side of static contact and gap between static contact and moving contact is corresponding；The top and bottom of the swing rod and yoke are rotatablely connected with insulation shielding plate and support base respectively, and swing rod, armature, insulation shielding plate and support base form four-bar linkage structure, and torsion spring is provided between armature and support base.The insulation shielding plate of the present invention can be rapidly inserted between moving contact and static contact in breaker disjunction short circuit current, 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.
Description
Technical field
The present invention relates to a kind of breaker of plastic casing with strong short circuit current breaking capacity, belong to emergency protective device technology
Field.
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, the overload and short trouble of distribution line are protected.Wherein short trouble, which is protected, is
Its most important function, the short circuit current of circuit is very big during due to short trouble, it is dynamic in disjunction short circuit current for breaker,
The very big plasma arc of energy can be produced between static contact, is only broken by some technical measures quickly by arc extinction
Road device could complete the task of disjunction short circuit current.
At present, caused HTHP electric arc enters when domestic and international MCCB uses arc-chutes technology to disjunction short circuit current
Row cooling and extinguishing, the arc quenching principle of this technology are：During disjunction short circuit current, 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, made
Extinguish under the cooling effect of its metal grid in arc-chutes.The arc quenching effect of this method by such as arc-chutes material, touch
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 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 network are required electric network reliability, a kind of new go out objectively is needed
Arc scheme, to greatly improve the ability of MCCB disjunction short circuit currents.
The content of the invention
It is an object of the invention to the drawback for prior art, there is provided a kind of plastic housing open circuit with compound arc extinction performance
Device, to improve the breaking capacity of short circuit current.
Problem of the present invention is realized with following technical proposals：
A kind of breaker of plastic casing with compound arc extinction performance, composition include the static contact being arranged in shell and taken off
The connected moving contact of buckle mechanism and insulation arc-control device, the insulation arc-control device include yoke, armature, insulation shielding plate, pendulum
Bar and support base, the yoke and support base are each attached on static contact, and support base is located at the lower section of yoke；The insulation shielding
Plate is located at the side of static contact and gap between static contact and moving contact is corresponding；The upper end of the swing rod and armature is with
End is rotatablely connected with insulation shielding plate and support base respectively, and swing rod, armature, insulation shielding plate and support base form double leval jib knot
Structure, torsion spring is provided between armature and support base.
The above-mentioned breaker of plastic casing with compound arc extinction performance, is provided with insulation spacer between the yoke and static contact.
The above-mentioned breaker of plastic casing with compound arc extinction performance, the both sides of the insulation shielding plate are bent downwards, kink
The one end for the remote yoke divided is rotatablely connected with armature, close to one end of armature and swing rod rotation connection.
The above-mentioned breaker of plastic casing with compound arc extinction performance, the swing rod set two, and the two is symmetrically mounted on insulation
The both sides of barricade and support base.
The above-mentioned breaker of plastic casing with compound arc extinction performance, arc-chutes are additionally provided with the case for circuit breaker.
The insulation shielding plate of the present invention can be rapidly inserted between moving contact and static contact in breaker disjunction short circuit current,
Make the arc extinction between dynamic and static contact, thus shorten the amplification time of arc energy, realize the short arcing of breaker
Or without arcing, so as to substantially increase the ability of breaker disjunction short circuit current.
The present invention is additionally arranged insulation shielding plate can be in breaker disjunction short circuit as auxiliary extinction of arc mechanism, auxiliary extinction of arc mechanism
The moment of electric current acts rapidly, inserted between moving contact and static contact, make between dynamic and static contact just caused arc extinction or
Person is reduced, and is thus shortened the amplification time of arc energy, is reduced gathering for arc energy, is realized the short of breaker and is flown
Arc or without arcing.This invention takes two-stage arc extinguishing, after the electric arc after initial auxiliary extinction of arc can be introduced into arc-chutes continuation
Continuous arc extinguishing operation, so as to substantially increase the arc extinguishing ability of breaker, also substantially increases breaker disjunction short circuit current
Ability.
Brief description of the drawings
Fig. 1 is the "on" position schematic diagram of the present invention；
Fig. 2 is the reprimand open state schematic diagram of the present invention；
Fig. 3 is the gate-dividing state schematic diagram of the present invention；
Fig. 4 is the structural representation of insulation arc-control device；
Fig. 5 is the structural representation of static contact；
Fig. 6 is the structural representation of insulation shielding plate；
Fig. 7 is Fig. 6 left view；
Fig. 8 is the structural representation of swing rod；
Fig. 9 is Fig. 8 left view；
Figure 10 is the structural representation of armature；
Figure 11 is Figure 10 left view.
Each list of reference numerals is in figure：1st, static contact；2nd, moving contact；3rd, yoke；4th, insulation shielding plate；5th, armature；6th, torsion spring；
7th, swing rod；8th, support base；9th, insulation spacer；10th, magnetic protection electrical apparatus release；10-1, tripping mechanism；11st, screw；12nd, shell；13、
Arc-chutes；14th, handle；A, moving contact rotating shaft；B, upper pin；C, lower bearing pin.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
The present invention is that an insulation arc-control device driven by electromagnetic force is installed at original MCCB static contact position, online
There is short-circuit current in road, while the dynamic and static contact of breaker is opened by electrodynamic repulsion force reprimand, the insulation interrupter cartridge of four-bar linkage structure
Put and acted under electromagnetic drive effect, its insulation shielding plate is rapidly inserted between dynamic and static contact, plays a part of rapid arc extinguishing.
Referring to Fig. 1-Figure 11, the present invention includes static contact 1, moving contact 2, the magnetic protection being arranged in engineering plastics shell 12
Electrical apparatus release 10, tripping mechanism 10-1, insulation arc-control device and arc-chutes 13.Wherein, insulation arc-control device uses four-bar linkage structure,
It is main to include yoke 3, insulation shielding plate 4, armature 5, torsion spring 6, swing rod 7, support base 8 and insulation spacer 9, insulation shielding plate 4, rank
Iron 5, swing rod 7 and support base 8 form a quadric chain, and support base 8 is fixedly connected with static contact 1, and swing rod 7 is cut with scissors by bearing pin
Be connected between support base 8 and insulation shielding plate 4, armature 5 equally also by lower bearing pin C and upper pin B be articulated with support base 8 with absolutely
Between edge barricade 4, insulation shielding plate 4 can be inserted between the dynamic and static contact of breaker.Yoke 3 is rectangular shape, is arranged on
In static contact, the position insulation spacer 9 that a upper and lower and side for yoke 3 contacts with static contact completely cuts off, and yoke 3 can go out
Attract armature 5 during existing short circuit current, usually also function to the effect of support static contact.Under normal circumstances, because the effect of torsion spring 6 is held in the mouth
Iron 5 is in the position away from yoke 3, and insulation arc-control device is in open mode.But when circuit failure short circuit current, by
Static contact 1 is set to denounce with moving contact 2 on the contrary, therefore producing electrodynamic repulsion force with the sense of current of moving contact 2 in the flat segments of static contact 1
Open, simultaneously because yoke 3 produces very big suction to armature 5 after being short-circuited magnetic field magnetization caused by electric current, armature 5 overcomes torsion spring
6 elastic force produces rotation, so as to drive the insulation arc-control device of four-bar linkage structure to act, its insulation shielding plate 4 is touched dynamic and static
(or while being short-circuited instantaneous release opening) is rapidly inserted between moving contact 2 and static contact 1 while head reprimand is opened, and is played fast
The effect of fast insulation shielding arc extinguishing.The short-circuit instantaneous release action of Simultaneous Switching, makes MCCB complete breaking course.Due to short circuit
Electric current is cut off, and strong-electromagnetic field disappears, insulation shielding flashboard homing under torsion spring effect.
Insulation shielding plate 4 is using high intensity, resistant to elevated temperatures engineering plastic materials.It can ensure effectively to divide as defined in product standard
The number (most 3 times) of disconnected short circuit current.
Insulation shielding plate 4 in the present invention is used as auxiliary extinction of arc mechanism arc extinguishing when dynamic and static contact is not yet opened completely, and
Common arc-chutes are then to have good extinguishing remnants arcings after dynamic and static contact is opened completely.
Rotating hinge chain type repulsion structure is used between static contact 1 and moving contact 2.The bonding jumper of static contact comprises at least one section
The flat segments parallel with moving contact, the sense of current in electric current and moving contact in flat segments is on the contrary, the length of flat segments is big
The length required for the repulsion for making dynamic and static contact repel each other out is produced when short circuit current flow in equal to moving contact and static contact.
When short trouble occurs, short circuit current in opposite direction flows through static contact flat segments and moving contact, now, in static contact and moves
Repulsion is produced between contact so that moving contact 2 is denounceed out rotationally clockwise around moving contact rotating shaft A.
The present invention installs insulation arc-control device in static contact 1 and the Position Design of moving contact 2, and dynamic and static contact can also be not
Repulsion structure with parallel inverse current, during MCCB short circuit breaking, moving contact is in magnetic protection electrical apparatus release 10 and takes off
When being acted under buckle mechanism 10-1 drivings, insulation shielding plate 4 can be also rapidly inserted between dynamic and static contact, reach quick insulation shielding
The purpose of arc extinguishing.
Arc-chutes 13, which are used to cool down, extinguishes remaining electric arc, therefore its capacity can suitably reduce；Handle 14 is installed on shell
12 upper ends, for normal occlusion sub-switching operation.
Because MCCB uses above technical scheme, following technological progress can be obtained：
1 can greatly improve the ability of product disjunction short circuit current；
2. the general purpose of AC and DC can be reached；
3. in disjunction failed shorted electric current, the further expansion of arc energy can be limited, so as to which the short of product can be realized
Arcing or without arcing.
Claims (5)
1. a kind of breaker of plastic casing with compound arc extinction performance, it is characterized in that, composition includes being arranged in shell (12)
Static contact (1), the moving contact (2) being connected with tripping mechanism (10-1) and insulation arc-control device, the insulation arc-control device include
Yoke (3), armature (5), insulation shielding plate (4), swing rod (7) and support base (8), the yoke (3) and support base (8) are fixed
On static contact (1), support base (8) is located at the lower section of yoke (3)；The insulation shielding plate (4) is located at the side of static contact (1)
And the gap between static contact (1) and moving contact (2) is corresponding；Distinguish the top and bottom of the swing rod (7) and yoke (3)
It is rotatablely connected with insulation shielding plate (4) and support base (8), swing rod (7), armature (5), insulation shielding plate (4) and support base (8) structure
Into four-bar linkage structure, torsion spring (6) is provided between armature (5) and support base (8).
2. the breaker of plastic casing according to claim 1 with compound arc extinction performance, it is characterized in that, the yoke (3) with
Insulation spacer (9) is provided between static contact (1).
3. the breaker of plastic casing according to claim 1 or 2 with compound arc extinction performance, it is characterized in that, the insulation screen
The both sides of shield plate (4) are bent downwards, and one end and the armature (5) of the remote yoke (3) of bending part are rotatablely connected, close to yoke
(3) one end is rotatablely connected with swing rod (7).
4. the breaker of plastic casing according to claim 3 with compound arc extinction performance, it is characterized in that, the swing rod (7) sets
Two are put, the two is symmetrically mounted on the both sides of insulation shielding plate (4) and support base (8).
5. the breaker of plastic casing according to claim 4 with compound arc extinction performance, it is characterized in that, the case for circuit breaker
(12) arc-chutes (13) are additionally provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710727710.8A CN107359068B (en) | 2017-08-23 | 2017-08-23 | Moulded case circuit breaker with compound arc extinguishing performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710727710.8A CN107359068B (en) | 2017-08-23 | 2017-08-23 | Moulded case circuit breaker with compound arc extinguishing performance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107359068A true CN107359068A (en) | 2017-11-17 |
| CN107359068B CN107359068B (en) | 2020-05-22 |
Family
ID=60288144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710727710.8A Active CN107359068B (en) | 2017-08-23 | 2017-08-23 | Moulded case circuit breaker with compound arc extinguishing performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107359068B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107731594A (en) * | 2017-11-27 | 2018-02-23 | 国隆电气有限公司 | A kind of back-up protection device of gapless surge protector |
| CN108133875A (en) * | 2017-12-26 | 2018-06-08 | 张珂 | One kind prevents circuit breaker arc from restriking method and device |
| CN108766848A (en) * | 2018-06-21 | 2018-11-06 | 上海诺雅克电气有限公司 | The arc extinguishing structure of breaker |
| CN109087832A (en) * | 2018-10-08 | 2018-12-25 | 嘉兴市加控电气设备制造有限公司 | Miniature circuit breaker |
| CN109119307A (en) * | 2018-09-30 | 2019-01-01 | 无锡新宏泰电器科技股份有限公司 | A kind of arc quenching system and the breaker with it |
| CN110581045A (en) * | 2019-09-12 | 2019-12-17 | 南京日新科技有限公司 | Isolated contact mechanism for circuit breaker |
| CN113851358A (en) * | 2021-08-04 | 2021-12-28 | 谢昕 | Arc isolation device with forced arc isolation function applied to circuit breaker |
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| CN102427006A (en) * | 2011-11-08 | 2012-04-25 | 江苏辉能电气有限公司 | Contact structure for low-current molded case low-voltage circuit breaker |
| CN102486982A (en) * | 2010-12-03 | 2012-06-06 | 北京人民电器厂有限公司 | Breaker with forced flash barrier device |
| CN202816732U (en) * | 2012-08-28 | 2013-03-20 | 北京人民电器厂有限公司 | Electrical appliance with arc insulating member |
| CN106783447A (en) * | 2017-03-22 | 2017-05-31 | 德力西电气有限公司 | A kind of circuit breaker forced extinguisher |
| CN207302929U (en) * | 2017-08-23 | 2018-05-01 | 河北宝凯电气股份有限公司 | A kind of breaker of plastic casing with compound arc extinction performance |
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2017
- 2017-08-23 CN CN201710727710.8A patent/CN107359068B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102486982A (en) * | 2010-12-03 | 2012-06-06 | 北京人民电器厂有限公司 | Breaker with forced flash barrier device |
| CN102427006A (en) * | 2011-11-08 | 2012-04-25 | 江苏辉能电气有限公司 | Contact structure for low-current molded case low-voltage circuit breaker |
| CN202816732U (en) * | 2012-08-28 | 2013-03-20 | 北京人民电器厂有限公司 | Electrical appliance with arc insulating member |
| CN106783447A (en) * | 2017-03-22 | 2017-05-31 | 德力西电气有限公司 | A kind of circuit breaker forced extinguisher |
| CN207302929U (en) * | 2017-08-23 | 2018-05-01 | 河北宝凯电气股份有限公司 | A kind of breaker of plastic casing with compound arc extinction performance |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107731594A (en) * | 2017-11-27 | 2018-02-23 | 国隆电气有限公司 | A kind of back-up protection device of gapless surge protector |
| CN107731594B (en) * | 2017-11-27 | 2020-04-17 | 国隆电气有限公司 | Back-up protector of gapless surge protector |
| CN108133875A (en) * | 2017-12-26 | 2018-06-08 | 张珂 | One kind prevents circuit breaker arc from restriking method and device |
| CN108766848A (en) * | 2018-06-21 | 2018-11-06 | 上海诺雅克电气有限公司 | The arc extinguishing structure of breaker |
| CN109119307A (en) * | 2018-09-30 | 2019-01-01 | 无锡新宏泰电器科技股份有限公司 | A kind of arc quenching system and the breaker with it |
| CN109119307B (en) * | 2018-09-30 | 2023-08-29 | 无锡新宏泰电器科技股份有限公司 | Arc extinguishing system and circuit breaker with same |
| CN109087832A (en) * | 2018-10-08 | 2018-12-25 | 嘉兴市加控电气设备制造有限公司 | Miniature circuit breaker |
| CN109087832B (en) * | 2018-10-08 | 2023-11-14 | 嘉兴市加控电气设备制造有限公司 | Small-sized circuit breaker |
| CN110581045A (en) * | 2019-09-12 | 2019-12-17 | 南京日新科技有限公司 | Isolated contact mechanism for circuit breaker |
| CN113851358A (en) * | 2021-08-04 | 2021-12-28 | 谢昕 | Arc isolation device with forced arc isolation function applied to circuit breaker |
| CN113851358B (en) * | 2021-08-04 | 2023-09-15 | 浙江创奇电气有限公司 | Arc isolation device with forced arc isolation function applied to circuit breaker |
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| Publication number | Publication date |
|---|---|
| CN107359068B (en) | 2020-05-22 |
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