CN111162464A - 3kV direct-current high-voltage box of electric locomotive - Google Patents
3kV direct-current high-voltage box of electric locomotive Download PDFInfo
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- CN111162464A CN111162464A CN202010005064.6A CN202010005064A CN111162464A CN 111162464 A CN111162464 A CN 111162464A CN 202010005064 A CN202010005064 A CN 202010005064A CN 111162464 A CN111162464 A CN 111162464A
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- voltage
- box
- voltage box
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- current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/46—Boxes; Parts thereof or accessories therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/08—Limitation or suppression of earth fault currents, e.g. Petersen coil
Abstract
The invention discloses a 3kV direct-current high-voltage box of an electric locomotive, which comprises a high-voltage box body, a ventilation device, a direct-current quick circuit breaker, a voltage sensor, a current transformer, a power box, a grounding switch, a lightning arrester and a supporting insulator, wherein the high-voltage box body comprises a left high-voltage box arranged on the left side and a right high-voltage box arranged on the right side; the ventilation device and the direct current quick breaker are arranged in the left high-voltage box, and insulation plates are arranged around the direct current quick breaker; the voltage sensor, the current transformer, the power box, the grounding switch and the lightning arrester are all arranged in the right high-voltage box; when high-temperature and high-voltage electric arcs are generated in the left high-voltage box, hot gas is discharged through the ventilation device and isolated from the right high-voltage box. Not only can effectively avoid the high-voltage device to take place to ground discharge phenomenon, reduced the space that the high-voltage device took electric locomotive top moreover, promoted installation and dismantlement efficiency.
Description
Technical Field
The invention relates to an electric locomotive, in particular to a 3kV direct-current high-voltage box of the electric locomotive.
Background
Electric locomotives generally refer to vehicles that use pantographs to take electrical energy from catenary lines and convert this electrical energy into tractive force, such as: electric trains, motor train units and high-speed rails in the prior art all belong to electric locomotives.
In the prior art, electric energy acquired by a pantograph needs to pass through high-voltage devices such as a voltage sensor, a current transformer, a direct-current quick circuit breaker, a grounding switch, a lightning arrester and the like and then enters an electric locomotive; in order to ensure that no electrical interference occurs between the high-voltage devices, the high-voltage devices are arranged on the top of the electric locomotive, and a preset electrical safety distance is kept between any two high-voltage devices. However, in the prior art, the high-voltage devices are easily influenced by weather conditions such as rain, snow, ice, fog and the like, and the earth discharge phenomenon frequently occurs; meanwhile, the preset electrical safety distance between the high-voltage devices in the prior art is long, so that a large space is occupied, and the space at the top of the electric locomotive is very narrow, so that the high-voltage devices are inconvenient to mount and dismount.
Disclosure of Invention
The invention aims to provide a 3kV direct-current high-voltage box of an electric locomotive.
The purpose of the invention is realized by the following technical scheme:
the invention discloses a 3kV direct-current high-voltage box of an electric locomotive, which comprises a high-voltage box body, a ventilation device, a direct-current quick circuit breaker, a voltage sensor, a current transformer, a power box, a grounding switch, a lightning arrester and a supporting insulator, wherein the high-voltage box body comprises a left high-voltage box arranged on the left side and a right high-voltage box arranged on the right side;
the ventilation device and the direct current quick circuit breaker are arranged in the left high-voltage box;
the voltage sensor, the current transformer, the power box, the grounding switch and the lightning arrester are all arranged in the right high-voltage box;
inside the left high-voltage box, all be provided with the insulation board around the arc chute of direct current quick circuit breaker, form an insulation space, when producing high temperature high-voltage electric arc in the left high-voltage box, the hot gas passes through ventilation unit discharges, with right high-voltage box keeps apart.
According to the technical scheme provided by the invention, the 3kV direct-current high-voltage box of the electric locomotive provided by the embodiment of the invention not only can effectively avoid the ground discharge phenomenon of the high-voltage device, but also can reduce the space occupied by the high-voltage device on the top of the electric locomotive and improve the installation and disassembly efficiency.
Drawings
FIG. 1 is a schematic diagram of an electrical principle of a 3kV DC high-voltage box of an electric locomotive according to an embodiment of the invention;
FIG. 2 is a block diagram of a 3kV DC high-voltage box of an electric locomotive according to an embodiment of the present invention;
FIG. 3 is a first schematic structural diagram of a 3kV DC high-voltage box of an electric locomotive according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a 3kV dc high-voltage box of an electric locomotive according to an embodiment of the present invention;
Detailed Description
The embodiments of the present invention will be described in further detail below. Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art.
The invention discloses a 3kV direct-current high-voltage box of an electric locomotive, which has the following preferred specific implementation modes:
the high-voltage box comprises a high-voltage box body, a ventilation device, a direct-current quick circuit breaker, a voltage sensor, a current transformer, a power box, a grounding switch, a lightning arrester and a supporting insulator, wherein the high-voltage box body comprises a left high-voltage box arranged on the left side and a right high-voltage box arranged on the right side;
the ventilation device and the direct current quick circuit breaker are arranged in the left high-voltage box;
the voltage sensor, the current transformer, the power box, the grounding switch and the lightning arrester are all arranged in the right high-voltage box;
inside the left high-voltage box, all be provided with the insulation board around the arc chute of direct current quick circuit breaker, form an insulation space, when producing high temperature high-voltage electric arc in the left high-voltage box, the hot gas passes through ventilation unit discharges, with right high-voltage box keeps apart.
The direct current quick circuit breaker comprises a tripping mechanism, the tripping mechanism is provided with a set tripping value, and when the current passing through the direct current quick circuit breaker exceeds the tripping value, the direct current quick circuit breaker is automatically switched off.
The high-voltage end of the voltage transformer is connected with a fixed contact of the direct-current quick circuit breaker; the low-voltage end is grounded; and the secondary line is led out from the side wall of the right high-voltage box through an aviation plug.
The current transformer is a straight-through current transformer and is sleeved on the incoming cable of the right high-voltage box, and the secondary line is led out from the side wall of the right high-voltage box through the aviation plug.
The grounding switch comprises a key box, the key box is provided with a blue key and a yellow key, when the grounding switch is in an operating position, the blue key is on the key box, the yellow key is pulled out, the grounding switch is locked in the operating position, and the grounding switch cannot enter the grounding position; when the grounding switch is in the grounding position, the yellow key is on the key box, and the blue key is pulled out, so that the grounding switch is locked in the grounding position and cannot enter the running position, and the mechanical safety interlocking effect is achieved.
The lightning arrester protects the high-voltage electrical apparatus in the box body in real time, and when the amplitude exceeds the overvoltage of more than 4kV, the lightning arrester acts, and the overvoltage is discharged through the lightning arrester.
The power box converts the external power supply DC110V into +/-15V and provides power for the electric equipment.
The 3kV direct-current high-voltage box of the electric locomotive can effectively avoid the ground discharge phenomenon of high-voltage devices, reduces the space occupied by the high-voltage devices on the top of the electric locomotive, and improves the mounting and dismounting efficiency.
The specific embodiment is as follows:
it should be noted that, in the present application, terms such as upper, lower, left, right, top, bottom, and the like, which represent orientations, are only used for clearly describing relative positions between components of the embodiment of the present invention, and are a description based on the orientations shown in the drawings of the specification, which do not limit the content of the present invention. The dc high-voltage box of the electric locomotive according to the embodiment of the present invention will be described in detail.
As shown in fig. 1, fig. 2, fig. 3, and fig. 4, a dc high-voltage tank of an electric locomotive may specifically include: the high-voltage box comprises a high-voltage box body 1, a ventilation device 2, a direct-current quick circuit breaker 3, a voltage sensor 4, a current transformer 5, a power supply box 6, a grounding switch 7, a lightning arrester 8 and a supporting insulator 9;
the box body 1 comprises a left high-pressure box and a right high-pressure box which are arranged from left to right in sequence; the ventilation device 2 and the direct current quick breaker 3 are arranged inside the left high-voltage box; the voltage sensor 4, the current transformer 5, the power box 6, the grounding switch 7 and the lightning arrester 8 are all arranged inside the right high-voltage box;
the cable inlet end connected with the pantograph end is connected with the supporting insulator, an inlet copper bar passes through the current transformer and is connected with a static contact of the direct current quick circuit breaker 3, and a movable contact of the direct current quick circuit breaker 3 is connected to the cable outlet end through the copper bar to realize connection with the inside of the electric locomotive;
insulating plates are arranged inside the left high-voltage box, around the direct-current quick circuit breaker 3 and the arc-extinguishing grid to form an insulating space, so that the direct-current quick circuit breaker 3 is prevented, and high-voltage electric arcs generated when fault heavy currents are broken are transmitted to the box body, so that ground discharge is avoided;
when the high fault current is broken, the generated hot gas can be instantly discharged out of the box body through the ventilation device 2 by the direct current quick circuit breaker 3, and the ventilation device 2 can also prevent external rainwater and dust from entering the box body to play a role in sealing;
because the direct current quick breaker 3 is arranged inside the left high-voltage box of the box body, the voltage sensor 4, the current transformer 5, the power box 6, the grounding switch 7 and the lightning arrester 8 are all arranged inside the right high-voltage box of the box body; therefore, the embodiment of the invention can effectively avoid the phenomenon that the high-voltage devices are subjected to earth discharge caused by the influence of weather conditions such as rain, snow, ice, haze and the like. Meanwhile, because the inside of the left high-voltage box of the box body is provided with the insulating plate and the ventilation device, the inside of the left high-voltage box has higher voltage resistance and ventilation and pressure relief capacity, so that the distance between the direct-current quick circuit breaker 3 and the ground can be ensured to be not electrically interfered by only designing the distance to be one fourth of the preset electrical safety distance in the prior art; therefore, the space of the electric locomotive occupied by the high-voltage box body can be effectively reduced; in addition, voltage sensor 4, current transformer 5, power pack 6, earthing switch 7, arrester 8 all set up inside the box right side high-voltage box, and box right side high-voltage box is provided with inspection hole and maintenance hole, has consequently not only made things convenient for the user to maintain, has promoted installation and dismantlement efficiency moreover.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A3 kV direct-current high-voltage box of an electric locomotive is characterized by comprising a high-voltage box body, a ventilation device, a direct-current quick circuit breaker, a voltage sensor, a current transformer, a power box, a grounding switch, a lightning arrester and a supporting insulator, wherein the high-voltage box body comprises a left high-voltage box arranged on the left side and a right high-voltage box arranged on the right side;
the ventilation device and the direct current quick circuit breaker are arranged in the left high-voltage box;
the voltage sensor, the current transformer, the power box, the grounding switch and the lightning arrester are all arranged in the right high-voltage box;
inside the left high-voltage box, all be provided with the insulation board around the arc chute of direct current quick circuit breaker, form an insulation space, when producing high temperature high-voltage electric arc in the left high-voltage box, the hot gas passes through ventilation unit discharges, with right high-voltage box keeps apart.
2. The electric locomotive 3kV dc high voltage tank of claim 1, wherein the dc fast breaker comprises a trip mechanism having a set trip value, the dc fast breaker automatically opens when the current through the dc fast breaker exceeds the trip value.
3. The electric locomotive 3kV direct-current high-voltage box according to claim 2, wherein a high-voltage end of the voltage transformer is connected with a static contact of the direct-current fast circuit breaker; the low-voltage end is grounded; and the secondary line is led out from the side wall of the right high-voltage box through an aviation plug.
4. The electric locomotive 3kV direct-current high-voltage box according to claim 3, wherein the current transformer is a straight-through current transformer, the straight-through current transformer is sleeved on an incoming cable of the right high-voltage box, and a secondary wire is led out from the side wall of the right high-voltage box through an aviation plug.
5. The electric locomotive 3kV DC high voltage box according to claim 4, wherein the grounding switch comprises a key box having two keys, blue and yellow, when the grounding switch is in the running position, the blue key is on the key box, the yellow key is pulled out, the grounding switch is locked in the running position, and the grounding switch cannot enter the grounding position; when the grounding switch is in the grounding position, the yellow key is on the key box, and the blue key is pulled out, so that the grounding switch is locked in the grounding position and cannot enter the running position, and the mechanical safety interlocking effect is achieved.
6. The electric locomotive 3kV DC high-voltage box according to claim 5, wherein the lightning arrester protects the high-voltage electric appliances in the box in real time, and when overvoltage with amplitude larger than 4kV is generated, the lightning arrester is actuated, and the overvoltage is discharged through the lightning arrester.
7. The electric locomotive 3kV DC high-voltage box according to claim 6, wherein the power box converts the external power DC110V into ± 15V to supply power to the electric equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010005064.6A CN111162464A (en) | 2020-01-03 | 2020-01-03 | 3kV direct-current high-voltage box of electric locomotive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010005064.6A CN111162464A (en) | 2020-01-03 | 2020-01-03 | 3kV direct-current high-voltage box of electric locomotive |
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| Publication Number | Publication Date |
|---|---|
| CN111162464A true CN111162464A (en) | 2020-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010005064.6A Pending CN111162464A (en) | 2020-01-03 | 2020-01-03 | 3kV direct-current high-voltage box of electric locomotive |
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| CN (1) | CN111162464A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113183762A (en) * | 2021-05-21 | 2021-07-30 | 中车大连电力牵引研发中心有限公司 | High-voltage electric device of non-contact net rail vehicle |
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| CN201438612U (en) * | 2009-06-01 | 2010-04-14 | 上海电器成套厂有限公司 | Pressure relieving cooling window for DC circuit breaker switch cabinet |
| CN201490132U (en) * | 2009-09-03 | 2010-05-26 | 杭州之江开关股份有限公司 | Novel structure of circuit breaker instantaneous tripper |
| CN202444178U (en) * | 2012-02-16 | 2012-09-19 | 南车株洲电力机车有限公司 | Electric locomotive interior network side cabinet |
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| CN106159787A (en) * | 2016-08-11 | 2016-11-23 | 现代重工(中国)电气有限公司 | A kind of closed gas insulated switch cabinet |
| CN206211390U (en) * | 2016-10-11 | 2017-05-31 | 许继电气股份有限公司 | A kind of gas-filling cabinet and its pressure release passage |
| CN107863282A (en) * | 2017-12-11 | 2018-03-30 | 常安集团有限公司 | The arc-chutes of breaker |
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2020
- 2020-01-03 CN CN202010005064.6A patent/CN111162464A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201438612U (en) * | 2009-06-01 | 2010-04-14 | 上海电器成套厂有限公司 | Pressure relieving cooling window for DC circuit breaker switch cabinet |
| CN201490132U (en) * | 2009-09-03 | 2010-05-26 | 杭州之江开关股份有限公司 | Novel structure of circuit breaker instantaneous tripper |
| CN102916362A (en) * | 2011-08-02 | 2013-02-06 | 湖南丰日电源电气股份有限公司 | Intelligent inflatable high-pressure vacuum switch cabinet for metro |
| CN202444178U (en) * | 2012-02-16 | 2012-09-19 | 南车株洲电力机车有限公司 | Electric locomotive interior network side cabinet |
| CN102738726A (en) * | 2012-07-17 | 2012-10-17 | 遵义长征电器设备有限责任公司 | Indoor high-voltage switch cabinet |
| CN103594953A (en) * | 2013-11-27 | 2014-02-19 | 北京赛德高科铁道电气科技有限责任公司 | GIS (Gas Insulated Swtichgear) high-voltage box of electric locomotive |
| CN104091734A (en) * | 2014-07-16 | 2014-10-08 | 德力西电气有限公司 | Arc-extinguishing device of breaker |
| CN106159787A (en) * | 2016-08-11 | 2016-11-23 | 现代重工(中国)电气有限公司 | A kind of closed gas insulated switch cabinet |
| CN206211390U (en) * | 2016-10-11 | 2017-05-31 | 许继电气股份有限公司 | A kind of gas-filling cabinet and its pressure release passage |
| CN107863282A (en) * | 2017-12-11 | 2018-03-30 | 常安集团有限公司 | The arc-chutes of breaker |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113183762A (en) * | 2021-05-21 | 2021-07-30 | 中车大连电力牵引研发中心有限公司 | High-voltage electric device of non-contact net rail vehicle |
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| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200515 |
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| RJ01 | Rejection of invention patent application after publication |