CN1758396A - Arc-extinguishing device of automatic change-over switch - Google Patents
Arc-extinguishing device of automatic change-over switch Download PDFInfo
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- CN1758396A CN1758396A CN 200410103059 CN200410103059A CN1758396A CN 1758396 A CN1758396 A CN 1758396A CN 200410103059 CN200410103059 CN 200410103059 CN 200410103059 A CN200410103059 A CN 200410103059A CN 1758396 A CN1758396 A CN 1758396A
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- arc
- control device
- extinguishing grid
- grid pieces
- automatic change
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Abstract
This invention relates to an arc extinction device with an automatic transfer switch including several arc extinction grating plates set in the arc extinction chamber to blank the arc generated in the transfer of the duplex supply characterizing that an insulation unit is set at the foot of a grating plate at the center to let the dissociating gas, metal and insulating units exist together in the arc extinction chamber so as to increase the voltage necessary for breaking through the arc extinction chamber between A and B supplies by fully utilizing the space of the chamber, the chamber will not be broken through and the arc between A and B supplies will not appear again when the phase voltage jumps to circuit voltage to avoid the inter-phase short circuit.
Description
Technical field
The present invention relates to a kind of arc-control device of automatic change-over, be specifically related to improvement the arc-control device of existing automatic change-over.
Background technology
The arc-control device of existing automatic change-over has provided the contact apparatus of automatic change-over mainly as shown in Figure 1 and Figure 2 among the figure, i.e. moving contact 3 and represent the fixed contact 4,5 of two-way power supply respectively; The a series of arc extinguishing grid pieces 2 that gives the arc-control device of automatic change-over is arranged in the arc control device 1, more particularly, the root both sides of a series of arc extinguishing grid pieces 2 are plugged on by in the arc-chute film trap 7 on a pair of arc-extinguish chamber that valve pieced together 6 that is mutually symmetrical, and arc extinguishing grid pieces 2 is the electric arc that produces when moving contact 3 is changed in order to extinguish.Specifically be, when switching between a pair of fixed contact 4,5 of moving contact 3 at the two-way power supply of the contact apparatus of automatic change-over, moving contact 3 is in 4,5 conversions fast of two fixed contacts, can produce electric arc when holding and scold at moving contact 3 and fixed contact 4,5, because the arc current flux path of space generation around distorts through meeting, so just produce one electric arc pulled to the suction of arc extinguishing grid pieces 2, electric arc is entered in the arc control device 1, rely on arc extinguishing grid pieces 2 to cool off and subdividing the arc, thereby reach the purpose of extinguish arcs.
At present, because low-voltage electrical apparatus generally develops rapidly to the volume miniaturization, in order to make full use of the arc extinguishing ability that arc control device 1 limited space can guarantee arc-control device again, the arc extinguishing grid pieces 2 that some must be arranged is according to certain spacing arrangement, if arc extinguishing grid pieces 2 very little, just do not reach the effect of quick arc extinguishing; Too much, then can't embody the design of mini requirement.
In the said structure, arc control device 1 are shared by fixed contact 4,5 pairing two-way power supplys, for the convenience on explaining and succinct, the applicant is marking A, B respectively corresponding to fixed contact 4,5 positions, be A, B two-way power supply shared (as follows) with this by means of explanation arc control device 1, the left side of arc control device 1 is power supply arc control device zone, A road, and the right side is power supply arc control device zone, B road.When moving contact 3 was scolded out with the fixed contact 4 of A road power supply, electric arc entered power supply arc control device zone, A road, and what apply between the fixed contact 4 of A road power supply and the moving contact 3 is phase voltage, and after this electric arc is extinguished, and this moment, moving contact 3 was approaching to the fixed contact 5 of B road power supply.The conversion of this contact is carried out A, the different alternate of B two-way power supply usually, for example the C phase from the B phase transformation of A road power supply to B road power supply.Because change-over time is short, the medium recovery strength of free gas does not recover very highly in the arc control device 1 at this moment, and be transformed into very near to or in contact with to the fixed contact 5 of B road power supply the time when moving contact 3, the voltage at free gas two ends becomes line voltage from phase voltage suddenly, and voltage raises to original
Doubly, because be alternating current, line voltage equals
Phase voltage doubly.Although clearance between open contacts is bigger, but because free gas medium intensity recovers not high in the arc control device 1, and arc extinguishing grid pieces 2 is arranged closely, spacing is little, under above-mentioned condition element, the situation of free gas and metalwork coexistence makes that the arc control device 1 between A, B two-way power supply are breakdown easily in this arc control device 1, in case arc control device 1 are breakdown, electric arc can rekindle between A, B two-way power supply and conducting, thereby causes the phase fault between A, B two-way power supply.This short circuit meeting causes burning and longevity system of automatic change-over, can cause the tripping operation of the superior and the subordinate's power equipment in the circuit, thereby makes the power equipment paralysis of whole branch roads system.
Summary of the invention
In order to address the aforementioned drawbacks, the invention provides a kind of arc-control device that can prevent the automatic change-over of phase fault between power supply.
Beneficial effect of the present invention is achieved through the following technical solutions, a kind of arc-control device of automatic change-over, comprise the arc extinguishing grid pieces 2 of some quantity of the electric arc that is produced when being arranged on being used in the arc control device 1 extinguishes between the two-way power supply conversion, a slice is provided with insulating part 8 to it is characterized in that having at least in the described arc extinguishing grid pieces 2.
Preferentially, there are two to be provided with insulating part 8 in the described arc extinguishing grid pieces 2.
Preferentially, described insulating part 8 is arranged on the foot of arc extinguishing grid pieces 2.
Preferentially, the described arc extinguishing grid pieces 2 that is provided with insulating part 8 is positioned at the centre position of all arc extinguishing grid pieces 2.
Preferentially, described insulating part 8 is a thermoplastic.
Described thermoplastic is any one among ABS, PA66, the ABS/PC.
Owing to adopted technique scheme, foot at one piece of arc extinguishing grid pieces 2 in centre position is provided with insulating part 8, make dissociate in the arc control device 1 gas and metalwork and insulating part 8 situation of coexistence occur, make under the prerequisite that makes full use of existing arc control device 1 space, the arc control device 1 required voltage that punctures between A, B two-way power supply is improved, jumping to from phase voltage under the line voltage condition, can not puncture arc control device 1, just can between A, B two-way power supply, not produce electric arc again more yet, thereby avoid the phase fault between A, B two-way power supply.
The specific embodiment that provides as non-limitative example to invention carries out following description in conjunction with the accompanying drawings, will make the features and advantages of the present invention become more clear.
Accompanying drawing and description of drawings
Fig. 1 lift for the present invention and prior art in the structural representation of arc-control device of automatic change-over.
Fig. 2 lift for the present invention and prior art in the cutaway view of arc-control device of automatic change-over.
Fig. 3 is an example structure figure of the arc-control device of automatic change-over of the present invention.
Fig. 4 is another example structure figure of the arc-control device of automatic change-over of the present invention.
Fig. 5 is the schematic diagram that is provided with the arc extinguishing grid pieces 2 behind the insulating part 8.
Embodiment
As shown in Figure 3, provided arc-extinguish chamber 6, it is made of two pieces of valves that mate with each other, and two pieces of formed spaces of valve are arc control device 1, also be to establish arc-chute film trap 7 between on the locular wall of arc control device 1 at the inwall of every piece of valve, plug arc extinguishing grid pieces 2 in each arc-chute film trap 7.In the foot of one piece of arc extinguishing grid pieces 2 placed in the middle of all arc extinguishing grid pieces 2 coated with insulating part 8, there is shown foot to one piece of arc extinguishing grid pieces 2 placed in the middle of being positioned at arc control device zone, left side coated with insulating part 8, promptly to approaching most or claiming foot adjacent to one piece of arc extinguishing grid pieces 2 in arc control device zone, right side coated with insulating part 8.The material of this insulating part 8 adopts thermoplastic, and (English name is: polycarbonates alloy for thermoplastic such as ABS; Chinese is: styrene-butadiene-acrylonitrile copolymer), and for example custom is referred to as the PA66 of nylon 66 (Chinese is: polyamide); Also (Chinese is: ABS-polycarbonate alloy as ABS/PC, another name is ABS-polycarbonate blend), or the like, insulating part 8 is combined in securely foot's (see figure 4) of one piece of arc extinguishing grid pieces 2 being selected with the injection moulding process that generally adopts in the prior art.Because the critical piece of cutting apart with extinguish arcs of arc extinguishing grid pieces 2 is roots of arc extinguishing grid pieces 2, and high-intensity magnetic field works to add in the foot of arc extinguishing grid pieces 2, therefore, only select one piece of arc extinguishing grid pieces 2 insulating part 8 is set, can't have any impact the arc extinguishing ability of arc control device 1.
Embodiment 2:
As shown in Figure 4, select two pieces of arc extinguishing grid pieces placed in the middle 2 foot's injection moulding insulating part 8, promptly the foot to the two pieces of arc extinguishing grid pieces 2 of the next-door neighbour in the and arranged on left and right sides arc control device zone has added insulating part 8, all the other are with embodiment 1.The test that present embodiment carries out is shown that the effect that the foot of two pieces of arc extinguishing grid pieces 2 being close in two arc control device zones is added insulating part 8 is better than aforesaid effect of selecting one piece through the applicant.
As shown in Figure 5, a pair of foot at arc extinguishing grid pieces 2 has been injection molding insulating part 8.
In sum, after adding insulating part 8, even owing to fixed contact 5 voltage jumps approaching or that contact between the fixed contact 4 that causes moving contact 3 and A road power supply of moving contact 3 and B road power supply arrive
Doubly, but because the setting of insulating part 8, the voltage that makes puncture arc control device 1 required two ends apply is greatly improved, and the magnitude of voltage that arc control device 1 two ends apply only to jump to line voltage from phase voltage be not to be enough to reach the magnitude of voltage that punctures arc control device 1, so just avoid the electric arc possibility of conducting of between the fixed contact 4 of moving contact 3 and A road power supply, restriking, thereby avoided the phase fault between A, the B two-way power supply.Insulating part 8 in the middle of being arranged on be because moving contact 3 in 4,5 conversions of fixed contact of two-way power supply, the free gas electric field strength in arc extinguishing grid pieces 2 centre positions recover higher relatively, be difficult for breakdown herein, the foot of arc extinguishing grid pieces 2 herein adds insulating part 8 again, has just more significantly improved the arc control device 1 breakdown required magnitude of voltage that applies.
The present invention is directed to a series of arc extinguishing grid pieces 2 of the arc-control device of traditional automatic change-over; select one or two piece of arc extinguishing grid pieces 2 placed in the middle and add insulating part 8; arc control device 1 were breakdown when the moving contact 3 that can prevent the contact apparatus of automatic change-over was changed between A, B two-way power supply; thereby avoided restriking of electric arc, also just protected the safe operation of automatic change-over and the superior and the subordinate's power equipment.And the setting of this insulating part 8 does not weaken the arc extinguishing ability of original arc-control device.
Claims (6)
1, a kind of arc-control device of automatic change-over, comprise the arc extinguishing grid pieces (2) of some quantity of the electric arc that is produced when being arranged on being used in the arc control device (1) extinguishes between the two-way power supply conversion, it is characterized in that having in the described arc extinguishing grid pieces (2) at least, a slice is provided with insulating part (8).
2, the arc-control device of automatic change-over according to claim 1 is characterized in that having two in the described arc extinguishing grid pieces (2) is provided with insulating part (8).
3, the arc-control device of automatic change-over according to claim 1 and 2 is characterized in that described insulating part (8) is arranged on the foot of arc extinguishing grid pieces (2).
4, the arc-control device of automatic change-over according to claim 1 and 2 is characterized in that the described arc extinguishing grid pieces (2) that is provided with insulating part (8) is positioned at the centre position of all arc extinguishing grid pieces (2).
5, the arc-control device of automatic change-over according to claim 1 is characterized in that described insulating part (8) is a thermoplastic.
6, the arc-control device of automatic change-over according to claim 5 is characterized in that described thermoplastic is any one among ABS, PA66, the ABS/PC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410103059 CN1758396A (en) | 2004-12-27 | 2004-12-27 | Arc-extinguishing device of automatic change-over switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410103059 CN1758396A (en) | 2004-12-27 | 2004-12-27 | Arc-extinguishing device of automatic change-over switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1758396A true CN1758396A (en) | 2006-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410103059 Pending CN1758396A (en) | 2004-12-27 | 2004-12-27 | Arc-extinguishing device of automatic change-over switch |
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| CN (1) | CN1758396A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105185671A (en) * | 2015-10-30 | 2015-12-23 | 上海电科电器科技有限公司 | Circuit breaker and baffles thereof |
| KR20180105638A (en) * | 2015-11-02 | 2018-09-28 | 세리 일렉트릭 테크놀로지 컴퍼니 리미티드 | Circuit breaker, and the exhaust structure |
| WO2018205499A1 (en) * | 2017-05-10 | 2018-11-15 | 平高集团有限公司 | Arc extinguishing device and circuit breaker using the arc extinguishing device |
-
2004
- 2004-12-27 CN CN 200410103059 patent/CN1758396A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105185671A (en) * | 2015-10-30 | 2015-12-23 | 上海电科电器科技有限公司 | Circuit breaker and baffles thereof |
| WO2017071449A1 (en) * | 2015-10-30 | 2017-05-04 | 上海电科电器科技有限公司 | Circuit-breaker and baffle thereof |
| CN105185671B (en) * | 2015-10-30 | 2019-06-25 | 上海电科电器科技有限公司 | Breaker and its baffle |
| RU2700790C1 (en) * | 2015-10-30 | 2019-09-23 | Сэари Электрик Технолоджи Ко., Лтд. | Automatic circuit breaker and reflector therefor |
| KR20180105638A (en) * | 2015-11-02 | 2018-09-28 | 세리 일렉트릭 테크놀로지 컴퍼니 리미티드 | Circuit breaker, and the exhaust structure |
| KR102641636B1 (en) * | 2015-11-02 | 2024-02-28 | 세리 일렉트릭 테크놀로지 컴퍼니 리미티드 | Circuit breaker and its exhaust structure |
| WO2018205499A1 (en) * | 2017-05-10 | 2018-11-15 | 平高集团有限公司 | Arc extinguishing device and circuit breaker using the arc extinguishing device |
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