CN103681021A - Air cooling structure for circuit breaker - Google Patents
Air cooling structure for circuit breaker Download PDFInfo
- Publication number
- CN103681021A CN103681021A CN201210320691.4A CN201210320691A CN103681021A CN 103681021 A CN103681021 A CN 103681021A CN 201210320691 A CN201210320691 A CN 201210320691A CN 103681021 A CN103681021 A CN 103681021A
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- contact
- circuit breaker
- air
- fixed contact
- fan
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Abstract
The invention provides an air cooling structure for a circuit breaker. The circuit breaker comprises a touch arm (3), a moving contact (1) and a fixed contact (9), wherein the moving contact (1) is fixedly connected with one end of the touch arm (3); a fan (2) is arranged in the touch arm (3) of the circuit breaker to blow air to the touch arm (3), the moving contact (1) and the fixed contact (9) of the circuit breaker, so as to prevent the temperatures of the touch arm (3), the moving contact (1) and the fixed contact (9) from raising; a ventilating slot is formed in the touch arm (3); air enters the touch arm (3) from the ventilating slot, flows by the moving contact (1), flows out from a contact gap between the moving contact (1) and the fixed contact (9), and is exhausted after flowing by the fixed contact (9). The forced air cooling manner of the air cooling structure is targeted, and the efficiency of the fan is high.
Description
Technical field
The present invention relates to the air-cooled structure for circuit breaker, relate to especially the air-cooled structure of the circuit breaker using in can withdraw-type switch cabinet.
Background technology
In can withdraw-type switch cabinet, moving contact of breaker and cabinet coupling part be moving contacts, for temperature raise require strict especially.
Air cooling way for this kind of circuit breaker is generally on switch cubicle top, install fan additional and ventilation hole is set at present, and in front door of switch cabinet bottom, ventilation hole is also set, and air channel reasonable in design, makes the violent position of airflow passes dynamic/static contact and temperature rise.
The cooling structure of this circuit breaker is by being arranged on the ventilation hole of front door of switch cabinet bottom, from ground air amount, and by air channel by the Bas Discharged of suction to the ventilation hole that is arranged on switch cubicle top, and discharge to switch cubicle is outside, but there is following shortcoming in such cooling structure:
In air blast cooling, the air entering in switch cubicle can, by the dust inspiration switch cubicle in ground, shorten the decreasing insulating of switch cubicle and maintenance period;
This air blast cooling mode need support with air channel, and Duct design is complicated, and there is no specific aim, sometimes must sacrifice the flow direction that ingress protection (IP) grade between compartment meets air channel;
On switch cubicle top, install fan additional, air channel and ventilation hole are set in switch cubicle, can affect the interior arcing performance of switch cubicle;
This fan need be drawn Power supply from low-pressure chamber, and power ratio is larger.
Summary of the invention
The present invention is intended to propose a kind of air-cooled structure for circuit breaker, it is applied in switch cubicle conventionally, overcome the above-mentioned deficiency of prior art, without air channel being set at inside switch cabinet and in top and the bottom of switch cubicle, ventilation hole being set, the position that fan is set makes fan for refrigerated area among a small circle, has improved the utilization ratio of air blast cooling.And the air circulation of this air-cooled structure, at inside switch cabinet, can not brought the dust in switch cubicle extraneous air into inside switch cabinet.
Air-cooled structure for circuit breaker of the present invention, its technical scheme is: a kind of air-cooled structure for circuit breaker, described circuit breaker comprises contact arm, moving contact and fixed contact, moving contact is fixedly connected with one end of contact arm, wherein, fan is arranged at the described contact arm inside of described circuit breaker with the described contact arm to described circuit breaker, described moving contact and described fixed contact blow to prevent described contact arm, the temperature of described moving contact and described fixed contact raises, on described contact arm, be provided with ventilation slot, air enters contact arm from described ventilation slot, flow through moving contact, and outwards flow from the contact gap of described moving contact and described fixed contact, and discharge after described fixed contact.
In the present invention, fan is set directly to contact arm inside, air in switch cubicle enters by the ventilation slot on contact arm, under fan effect, flow through moving contact and the fixed contact of circuit breaker, contact arm, moving contact and fixed contact are carried out to air blast cooling, and reach and control the object that temperature rises, finally, Air Flow is after fixed contact, by Bas Discharged.
Preferably, described fixed contact is arranged in contact box, is provided with perforate on contact box, and the perforate of the air of the process that flows fixed contact from contact box is discharged to contact box outside.
Preferably, the perforate on contact box is arranged on fixed contact apart from a side of the distal portion of moving contact.
Conventionally, the fixed contact of the circuit breaker using in can withdraw-type switch cabinet is arranged in contact box, flows through the air of fixed contact, via this perforate, is discharged to contact box outside.And being arranged on fixed contact, the perforate of contact box just discharges after whole fixed contact apart from the Air Flow that is conducive to of distal portion one side of moving contact.Thereby, complete air flowing between contact arm, moving contact and fixed contact, and reach the object of controlling contact arm, moving contact and the rising of fixed contact temperature.
Preferably, around the contact arm periphery of described circuit breaker, be provided with induction coil, in response to the electric current in the applied major loop of described circuit breaker, induction coil produces electromotive force with to described fan power supply.
When the applied major loop of circuit breaker has electric current to pass through, the induction coil being enclosed within on circuit breaker contact arm induces electromotive force, and this electromotive force is powered to fan.Therefore, fan, without drawing Power supply from low-pressure chamber, can pass through circuit breaker self-powered, has simplified the service condition of fan.At this, can use the induction coil of little iron core, be easy to make its iron core to be tending towards saturated, how the electric current at this time no matter being carried on induction coil changes, therefore induction coil is all the time in saturation condition,, the electric current that coil can induce remains unchanged, and has reached the object of stable power-supplying.
Preferably, between induction coil and fan, be provided with rectifying device so that galvanic current source to be provided to fan.
Described rectifying device is rectifying and voltage-stabilizing wiring board.
In order further to stablize the electromotive force that induction coil produces, by the electromotive force inducing by rectifying and voltage-stabilizing wiring board so that galvanic current source to be provided to fan.
Preferably, at described induction coil, be outside equipped with insulating sleeve so that induction coil and external insulation.
Can be so that induction coil and exterior insulation have prevented the generation of shock hazard at induction coil periphery envelope insulating sleeve.
Preferably, described moving contact is Mume flower contact.
Select Mume flower contact to coordinate with the optional feature that is applicable to this Mume flower contact, further to improve joint capacity and the current delivery ability of the dynamic and static contact of circuit breaker, the performance of optimized breaker.
In sum, according to the air-cooled structure for circuit breaker of the present invention, by fan is set in circuit breaker contact arm, fan is by the induction coil inductive power supply around contact arm periphery, the convection current of accelerating air reduces the temperature of moving contact, fixed contact and contact arm, thereby reach cooling contact, the object that limit temperature raises.This air-cooled structure not be used in and can in withdraw-type switch cabinet, offer ventilation hole and air channel, has simplified the design of switch cubicle, and the wind of fan directly acts on dynamic and static contact and the contact arm of circuit breaker, and cooling effectiveness is high, good cooling results.The air circulation of this air-cooled structure is all carried out at inside switch cabinet, reduce dust in extraneous air and entered switch cubicle, to the pollution in switch cubicle, and because be provided for the hole of ventilation on switch cubicle, while breaking down in switch cubicle, inner electric arc etc. can be drawn out to outside, greatly avoid causing due to blast the generation of personal safety accident.
Accompanying drawing explanation
Other advantage of the present invention and feature are by from ensuing that only provide with the object of non-limiting example and represent that the explanation of specific embodiment of the present invention in the accompanying drawings becomes more obviously clear, in the accompanying drawings:
Fig. 1 is according to the cross sectional representation of the air-cooled structure for circuit breaker of the present invention (not containing fixed contact);
Fig. 2 is the schematic diagram of the circuit breaker in can withdraw-type switch cabinet of the prior art.
Description of reference numerals
1, moving contact
2, fan
3, contact arm
4, insulating sleeve
5, induction coil
6, rectifying and voltage-stabilizing wiring board
7, contact box
8, busbar
9, fixed contact
10, electric wire
Embodiment
Below with reference to Fig. 1 to Fig. 2, the air-cooled structure for circuit breaker of the present invention is further detailed.
Fig. 1 shows the cross sectional representation (not containing fixed contact) of the air-cooled structure for circuit breaker of the present invention.This air-cooled structure comprises moving contact 1, fan 2, and contact arm 3, insulating sleeve 4, induction coil 5, rectifying and voltage-stabilizing wiring board 6 and fixed contact 9(are shown in Fig. 2).In this embodiment, moving contact is used Mume flower contact (cluster).
Moving contact 1 is fixedly connected with one end of contact arm 3, fan 2 is arranged on contact arm 3 inside of circuit breaker, for the contact arm 3 to circuit breaker, moving contact 1 and fixed contact 9 air-supplies, to prevent that its temperature from raising, on contact arm 3, be provided with ventilation slot (not shown), at the contact box 7(that holds fixed contact 9, see Fig. 2) on be provided with perforate, air enters into contact arm 3 inside from ventilation slot, flow through moving contact 1, and outwards flow from moving contact 1 and the contact gap of fixed contact 9, flow behind the outside of fixed contact 9, and discharge through the perforate on contact box 7.Perforate on contact box 7 to be arranged on fixed contact 9 and with the Air Flow in order making to flow out from the gap location between moving contact 1 and fixed contact 9, to pass through whole fixed contact 9 apart from the distal side of moving contact 1
In the present invention, fan is set directly to contact arm 3 inside, extraneous air enters by the ventilation slot on contact arm 3, under the effect of fan 2, flow through moving contact 1 and the fixed contact 9 of circuit breaker, contact arm 3, moving contact 1 and fixed contact 9 are carried out to air blast cooling, reach and control the object that temperature rises, finally, Air Flow behind fixed contact 9 outsides, by the perforate on contact box 7 by Bas Discharged.
Contact arm 3 peripheries around circuit breaker are provided with induction coil 5, and this induction coil 5, in response to the electric current in the applied major loop of circuit breaker, produces electromotive force, utilize this electromotive force generation current to fan 2 power supplies.
Therefore, fan 2 no longer need to be drawn Power supply from low-pressure chamber, can pass through circuit breaker self-powered, has simplified the service condition of fan 2.At this, use the induction coil of little iron core, be easy to make its iron core to be tending towards saturated, how the electric current at this time no matter being carried on induction coil changes, therefore induction coil is all the time in saturation condition,, the electric current that coil can induce remains unchanged, and has reached the object of stable power-supplying.In the present embodiment, fixed contact 9 is connected on busbar 8, the electric current that induction coil induction busbar 8 is supplied with, because induction coil is in magnetic saturation state, the curent change on busbar 8 can obviously not affect induced electromotive force, so the output valve of induced electromotive force is stable.
In order to obtain the more stable value of induced electromotive force, rectifying device 6 can be set between induction coil 5 and fan 2 so that galvanic current source to be provided to fan.Between induction coil 5 and fan 2, by electric wire 10, connect, the electric power that electric wire 10 is carried, before reaching fan, first carries out rectification by rectifying device 6, and in this embodiment, rectifying device 6 is rectifying and voltage-stabilizing wiring board.
Insulating sleeve 4 envelopes are exposed to extraneous periphery so that induction coil 5 and external insulation have prevented the generation of shock hazard at induction coil 5.
The advantage that moving contact is Mume flower contact is in this embodiment to select Mume flower contact to coordinate with the optional feature that is applicable to Mume flower contact, further improve joint capacity and the current delivery ability of the dynamic and static contact of circuit breaker, the performance of optimized breaker.
Fig. 2 shows the schematic diagram of the circuit breaker in can withdraw-type switch cabinet of the prior art.The upper left side of Fig. 2 is the viewgraph of cross-section after moving contact 1 engages with fixed contact 9.The lower-left side of Fig. 2 is not for engaging the viewgraph of cross-section of the fixed contact 9 of moving contact 1.
As shown in Figure 2, fixed contact 9 is arranged on contact box 7, and contact box 7 has busbar 8, and busbar 8 is assembled in contact box 7 by the perforate on contact box 7.The design of fixed contact 9 of the present invention, contact box 7 and busbar 8 is same as the prior art.
But, because the improvement of the present invention to circuit breaker contact arm part makes the type of flow of air in switch cubicle unlike the prior art.In the switch cubicle of application air-cooled structure of the present invention, the flow direction of air is as shown in the arrow in Fig. 2, Air Flow enters contact arm 3, and by moving contact 1, and arrive fixed contact 9, from the contact gap between moving contact 1 and fixed contact 9, discharge, and flow through the outside of fixed contact 9, last, arrive the perforate on contact box 7, and discharge from this perforate.Thereby, complete air flowing between contact arm 3, moving contact 1 and fixed contact 9, and controlled contact arm 3, moving contact 1 and fixed contact 9 temperature and risen.
It is pointed out that in the present invention air-cooled structure is for cooling used air all circulates in switch cubicle, the air entering in the ventilation slot of contact arm 3 is positioned at switch cubicle, and the air of discharging from contact box 7 is also positioned at switch cubicle.This air circulation is circulation in switch cubicle, the dust in extraneous air can be incorporated in switch cubicle, reduced pollution, and because be provided for the hole of ventilation on switch cubicle, while breaking down in switch cubicle, inner electric arc etc. can be drawn out to outside, greatly avoid the generation of the accidents such as blast.
According to the air-cooled structure for circuit breaker of the present invention, there is following advantage:
The air blast cooling mode of this air-cooled structure is with strong points, and fan efficiency is high, thereby it directly accelerates facing to moving contact and fixed contact blowing the temperature that thermal convection reduces moving contact and fixed contact;
The fan of this air-cooled structure is contained on circuit breaker, makes small rated current breaker can be applied to the switch cubicle that ampacity is large and becomes possibility;
Circuit breaker place can withdraw-type switch cabinet in, without air channel is installed, without taking inside switch cabinet space, inside switch cabinet is simply clean and tidy, and more multicomponent device can be installed more easily.
Circuit breaker place can withdraw-type switch cabinet in, switch cubicle, without perforate, improves the arcing performance in switch cubicle greatly.
The fan of this air-cooled structure is powered without additional power source, and fan required electric power directly obtains by induction coil, and utilizes iron core magnetic saturation principle to make output voltage basicly stable, uses bridge rectifier, filtering, voltage stabilizing to obtain high-quality electric energy simultaneously.
Circuit breaker place can withdraw-type switch cabinet in adopt in circulation form, greatly reduced entering of external dust.
Meanwhile, cooling along with moving contact, fixed contact and contact arm, the size of minimizing moving contact, fixed contact and contact arm that can be suitable, cost-saving.
In order to coordinate the size of circuit breaker, the fan therefore using in this air-cooled structure is less, and the miniaturization of fan is conducive to reduce noise.
Above the present invention is described in detail; for one of ordinary skill in the art; thought according to the embodiment of the present invention; change in specific embodiments and applications should not thought and depart from the scope of protection of the invention; in sum, this description should not be construed as limitation of the present invention.
Claims (8)
1. the air-cooled structure for circuit breaker, described circuit breaker comprises contact arm (3), moving contact (1) and fixed contact (9), described moving contact (1) is fixedly connected with one end of described contact arm (3), it is characterized in that, fan (2) is arranged at described contact arm (3) inside of described circuit breaker with the described contact arm (3) to described circuit breaker, described moving contact (1) and described fixed contact (9) air-supply are to prevent described contact arm (3), the temperature of described moving contact (1) and described fixed contact (9) raises, described contact arm is provided with ventilation slot on (3), air enters described contact arm (3) from described ventilation slot, flow through described moving contact (1), and outwards flow from described moving contact (1) and the contact gap of described fixed contact (9), and discharge after described fixed contact (9).
2. the air-cooled structure for circuit breaker according to claim 1, it is characterized in that: described fixed contact (9) is arranged in contact box (7), described contact box is provided with perforate on (7), and the perforate of the air of the described fixed contact of process (9) that flows from described contact box is discharged to contact box outside.
3. the air-cooled structure for circuit breaker according to claim 1, it is characterized in that: described contact arm (3) periphery around described circuit breaker is provided with induction coil (5), in response to the electric current in the applied major loop of described circuit breaker, described induction coil (5) produces electromotive force so that described fan (2) is powered.
4. the air-cooled structure for circuit breaker according to claim 3, is characterized in that: between described induction coil (5) and described fan (2), be provided with rectifying device (6) to provide galvanic current source to described fan (2).
5. the air-cooled structure for circuit breaker according to claim 4, is characterized in that: described rectifying device (6) is rectifying and voltage-stabilizing wiring board.
6. the air-cooled structure for circuit breaker according to claim 3, is characterized in that: at described induction coil (5), be outside equipped with insulating sleeve (4) so that described induction coil (5) and external insulation.
7. according to the air-cooled structure for circuit breaker described in any one in claim 1 to 6, it is characterized in that: described moving contact (9) is Mume flower contact.
8. the air-cooled structure for circuit breaker according to claim 2, is characterized in that: the perforate on described contact box (7) is arranged on a side of the distal portion of described fixed contact (9) the described moving contact of distance (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210320691.4A CN103681021B (en) | 2012-08-31 | 2012-08-31 | For the air-cooled structure of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210320691.4A CN103681021B (en) | 2012-08-31 | 2012-08-31 | For the air-cooled structure of circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103681021A true CN103681021A (en) | 2014-03-26 |
| CN103681021B CN103681021B (en) | 2016-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210320691.4A Expired - Fee Related CN103681021B (en) | 2012-08-31 | 2012-08-31 | For the air-cooled structure of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103681021B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109586170A (en) * | 2019-01-31 | 2019-04-05 | 国网江苏电力设计咨询有限公司 | A kind of dc circuit breaker main branch |
| CN113612148A (en) * | 2021-08-04 | 2021-11-05 | 句容市华容电器有限公司 | Contact box and high-voltage switch cabinet provided with same |
| CN115985713A (en) * | 2023-02-20 | 2023-04-18 | 纳图智能科技(常州)有限公司 | Protection type vacuum circuit breaker |
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| CN2636464Y (en) * | 2003-07-23 | 2004-08-25 | 青岛经济技术开发区电器研究所 | Natural air cooling medium voltage switch cabinet |
| CN201219070Y (en) * | 2008-07-02 | 2009-04-08 | 厦门华电开关有限公司 | Connection device for moving and fixed contacts |
| CN202308841U (en) * | 2011-10-10 | 2012-07-04 | 正泰电气股份有限公司 | Heat radiation device of heavy-current removal switch device |
| DE102011004421A1 (en) * | 2011-02-18 | 2012-08-23 | Schneider Electric Sachsenwerk Gmbh | Cooling device for electrical switchgear, has feed tube for supply of air or gas to high temperature area in switchboard, and feed channel for supply of liquid to high temperature area |
| CN202758769U (en) * | 2012-08-31 | 2013-02-27 | 施耐德电器工业公司 | Air cooling structure used for circuit breaker |
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2012
- 2012-08-31 CN CN201210320691.4A patent/CN103681021B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2636464Y (en) * | 2003-07-23 | 2004-08-25 | 青岛经济技术开发区电器研究所 | Natural air cooling medium voltage switch cabinet |
| CN201219070Y (en) * | 2008-07-02 | 2009-04-08 | 厦门华电开关有限公司 | Connection device for moving and fixed contacts |
| DE102011004421A1 (en) * | 2011-02-18 | 2012-08-23 | Schneider Electric Sachsenwerk Gmbh | Cooling device for electrical switchgear, has feed tube for supply of air or gas to high temperature area in switchboard, and feed channel for supply of liquid to high temperature area |
| CN202308841U (en) * | 2011-10-10 | 2012-07-04 | 正泰电气股份有限公司 | Heat radiation device of heavy-current removal switch device |
| CN202758769U (en) * | 2012-08-31 | 2013-02-27 | 施耐德电器工业公司 | Air cooling structure used for circuit breaker |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109586170A (en) * | 2019-01-31 | 2019-04-05 | 国网江苏电力设计咨询有限公司 | A kind of dc circuit breaker main branch |
| CN109586170B (en) * | 2019-01-31 | 2024-04-05 | 国网江苏电力设计咨询有限公司 | Main branch of direct current breaker |
| CN113612148A (en) * | 2021-08-04 | 2021-11-05 | 句容市华容电器有限公司 | Contact box and high-voltage switch cabinet provided with same |
| CN113612148B (en) * | 2021-08-04 | 2023-10-20 | 河北华能源电力设备有限公司 | Contact box and high-voltage switch cabinet provided with same |
| CN115985713A (en) * | 2023-02-20 | 2023-04-18 | 纳图智能科技(常州)有限公司 | Protection type vacuum circuit breaker |
| CN115985713B (en) * | 2023-02-20 | 2023-10-10 | 纳图智能科技(常州)有限公司 | Protective vacuum circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103681021B (en) | 2016-03-02 |
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Granted publication date: 20160302 Termination date: 20170831 |