CN105958459A - Railway signal cable grounding system - Google Patents
Railway signal cable grounding system Download PDFInfo
- Publication number
- CN105958459A CN105958459A CN201610439803.6A CN201610439803A CN105958459A CN 105958459 A CN105958459 A CN 105958459A CN 201610439803 A CN201610439803 A CN 201610439803A CN 105958459 A CN105958459 A CN 105958459A
- Authority
- CN
- China
- Prior art keywords
- cable
- railway signal
- surge protector
- ground wire
- signal cable
- Prior art date
- 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.)
- Pending
Links
- 230000001012 protector Effects 0.000 claims abstract description 45
- 229910052751 metal Inorganic materials 0.000 claims abstract description 34
- 239000002184 metal Substances 0.000 claims abstract description 34
- 230000001052 transient effect Effects 0.000 claims abstract description 9
- 238000009825 accumulation Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000006378 damage Effects 0.000 abstract description 8
- 230000011218 segmentation Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 206010016256 fatigue Diseases 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
Classifications
-
- 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
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a railway signal cable grounding system, comprising: the surge protectors are arranged in the same number as the number of the sections of the railway signal cables, one end of a cable metal outer sheath of each section of the railway signal cable is directly connected with the through ground wire, and the other end of the cable metal outer sheath is connected with the through ground wire through one surge protector. Under the power frequency condition, cable metal oversheath one end is in the nearly open circuit mode state of high impedance and passes through minimum traction current because of surge protector, and this traction current can neglect neglected, thereby make the cable not have the risk of being burnt, under the thunder and lightning transient state condition, cable metal oversheath before with link up the one end that the ground wire is connected, through surge protector and link up the ground wire and be connected, make cable metal oversheath potential at this end can fall below surge protector's protection voltage, and this protection voltage can not cause the damage to cable and equipment, thereby the safe application of cable and equipment under the thunder and lightning environment has been guaranteed.
Description
Technical field
The present invention relates to cable grounding technical field, in particular, relate to a kind of railway signal cable and connect
Ground system.
Background technology
Railway signal cable has transmission of analogue signal (1MHz), digital signal (2Mbit/s), rated voltage
Exchange 750V or direct current 1100V and following system control information and the transfer function of electric energy, it is adaptable to railway
About the connection between equipment and control device in signaling system.In high-speed railway, railway signal cable
It is mainly used in the analogue signal transmission of ZPW-2000A track circuit, is generally laid in rail side along circuit
In cable trough.
In actual applications, the length of railway signal cable is generally 7.5km～12.5km, common for 10km.
The generally every 1km of railway signal cable carries out a core splice, and will protect outside the cable metal at core splice
Set disconnects.For avoiding because potential difference causes personal injury or device damage, cable metal oversheath need to be connect
Enter Through ground wire.Owing to high-speed railway traction current is relatively big, if railway signal cable uses segment of double termination
Ground mode, then when (such as, through track is lost) causing traction current backflow not smooth for some reason,
Traction current can be refluxed by cable metal oversheath, thus there is the risk that cable burns.Therefore, for
Avoiding traction current backflow not smooth, railway signal cable uses segmentation mode single-end earthed.Referring specifically to Fig. 1,
The segmentation of a kind of railway signal cable schematic diagram single-end earthed disclosed in prior art, at railway signal cable
Every 1km cable splice at, Through ground wire 02 is accessed in one end of cable metal oversheath 01.
Although railway signal cable uses segmentation mode to be single-end earthed prevented effectively from and refluxes at traction current
Time not smooth, traction current is refluxed by cable metal oversheath, causes the situation that cable burns.But,
Under Lightning Transient signal, railway signal cable uses segmentation mode single-end earthed can cause outside cable metal
Higher current potential is accumulated in one end that sheath is not connected with Through ground wire, thus cable and equipment are caused damage.
Summary of the invention
In view of this, the open a kind of railway signal cable earthed system of the present invention, to solve railway signal electricity
One end that cable uses segmentation mode single-end earthed that cable metal oversheath can be caused not to be connected with Through ground wire is tired out
Long-pending higher current potential, thus the problem that cable and equipment are caused damage.
A kind of railway signal cable earthed system, including: railway signal cable, Through ground wire and with described
The Surge Protector of the quantity such as the segments of railway signal cable；
One end of the cable metal oversheath of each section of cable of described railway signal cable is directly connected to described
Through ground wire, the other end of described cable metal oversheath connects described by a described Surge Protector
Through ground wire.
Preferably, described Surge Protector includes: discharge tube and pressure-sensitive with what described discharge tube was connected in series
Resistance.
Preferably, described Surge Protector is votage limit type Surge Protector.
Preferably, under the conditions of Lightning Transient, the impact of described Surge Protector limits voltage less than described
The heart yearn of railway signal cable and the impulse withstand voltage of described cable metal oversheath.
Preferably, under the conditions of power frequency, less than the described railway signal cable of preset length described through
In ground wire under the coupling of maximum traction current, when one end of the cable metal oversheath of this railway signal cable
When connecting described Through ground wire, in the accumulation of the other end of the cable metal oversheath of this railway signal cable
Voltage is less than the maximum continuous operating voltage of described Surge Protector.
Preferably, described preset length is 2km.
Preferably, the startup time of described Surge Protector is less than Preset Time.
Preferably, described Preset Time is 10ms.
From above-mentioned technical scheme it can be seen that the invention discloses a kind of railway signal cable earthed system,
Protect including: railway signal cable, Through ground wire and the surge with the quantity such as the segments of railway signal cable
Protecting device, one end of the cable metal oversheath of each section of cable of railway signal cable is directly connected to throughly
Line, the other end of cable metal oversheath connects Through ground wire by a Surge Protector.At power frequency bar
Under part, cable metal oversheath one end can lead to because Surge Protector is in high impedance nearly open circuit mode state
Crossing minimum traction current, this traction current is negligible, so that cable does not exist the wind being burned out
Danger, under the conditions of Lightning Transient, one end that cable metal oversheath is not connected with Through ground wire before, logical
Cross Surge Protector to be connected with Through ground wire, make cable metal oversheath can be down to surge at the current potential of this end
Below the protection voltage of protector, and cable and equipment will not be caused damage by this protection voltage, thus protect
Cable and the safety operating of equipment under thunder and lightning environment are demonstrate,proved.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that below,
Accompanying drawing in description is only embodiments of the invention, for those of ordinary skill in the art, not
On the premise of paying creative work, it is also possible to obtain other accompanying drawing according to disclosed accompanying drawing.
Fig. 1 is the segmentation of a kind of railway signal cable schematic diagram single-end earthed disclosed in prior embodiment；
Fig. 2 is the structural representation of a kind of railway signal cable earthed system disclosed in the embodiment of the present invention；
Fig. 3 is the structure chart of a kind of railway signal cable disclosed in the embodiment of the present invention；
Fig. 4 is the structural representation of a kind of Surge Protector disclosed in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
The embodiment of the invention discloses a kind of railway signal cable earthed system, to solve railway signal cable
Use one end accumulation that segmentation mode single-end earthed can cause cable metal oversheath not to be connected with Through ground wire
Higher current potential, thus the problem that cable and equipment are caused damage.
See Fig. 2, the structural representation of a kind of railway signal cable earthed system disclosed in the embodiment of the present invention
Figure, this cable grounding system includes: railway signal cable 10, Through ground wire 20 and and railway signal cable
The Surge Protector (Surge Protection Device, SPD) 30 of the quantity such as the segments of 10；
Wherein, one end of the cable metal oversheath 11 of each section of cable of railway signal cable 10 directly connects
Connecing Through ground wire 20, the other end of cable metal oversheath 11 connects Through ground wire by Surge Protector 30
20。
Understand the structure of railway signal cable 10 for convenience, see Fig. 3, the embodiment of the invention discloses one
Planting the structure chart of railway signal cable, railway signal cable 10 includes the most successively: the first ethylene protects
Layer 101, steel-tape armouring the 102, second ethylene sheath 103, aluminium sheath 104, inner shield Copper Foil 105 and
Heart yearn 106, wherein, steel-tape armouring 102, aluminium sheath 104 and inner shield Copper Foil 105 three are referred to as electricity
Cable metallic jacket 11.
Through ground wire 20 is that a kind of downline road is laid, for connecting various electrical equipment, building (structure)
Build the earth conductor of thing hardware etc..
Surge Protector (also known as surge protector) 30 be a kind of for various electronic equipments, instrument and meter,
Communication line provides the electronic installation of security protection.It is applicable to (or the signal transmission of all kinds of electric power system
System) in, when in electric loop or communication line because extraneous interference produce suddenly overcurrent or
During overvoltage, shunting can be turned within the extremely short time, thus avoid surge to other equipment in loop
Damage.
In the present embodiment, Surge Protector 30 is in high impedance nearly open circuit mode state under the conditions of power frequency,
Low ESR nearly short-circuit mode state it is under the conditions of Lightning Transient.Therefore, under the conditions of power frequency, cable
Metallic jacket 11 can pass through minimum because Surge Protector 30 is in high impedance nearly open circuit mode state
Traction current, this traction current is negligible, so that cable does not exist the risk being burned out；?
Under the conditions of Lightning Transient, one end that cable metal oversheath 11 is not connected with Through ground wire 20 before, pass through
Surge Protector 30 is connected with Through ground wire 20, so that cable metal oversheath 11 can at the current potential of this end
It is reduced to below the protection voltage of Surge Protector 30, owing to this protection undertension is with to cable and equipment
Cause damage, thus ensure that cable and the safety operating of equipment under thunder and lightning environment.
Further, the present invention solves railway signal cable 10 in power frequency condition and Lightning Transient condition the most simultaneously
The problem that difference is taken into account, provides a kind of new ground connection side safer, reliable for railway signal cable 10
Formula.
Wherein, for being further ensured that railway signal cable 10 ground connection in cable grounding system disclosed by the invention
The effectiveness of mode, the performance of Surge Protector 30 plays a key effect.
In the present invention, Surge Protector 30 selects voltage-type Surge Protector.
Owing to Surge Protector 30 is long-term in outdoor application, therefore, it is produced by the present invention for avoiding leakage current
Raw impact, the electrical structure of Surge Protector 30 preferred varistor concatenation discharge tube.Referring specifically to Fig. 4,
The structural representation of a kind of Surge Protector disclosed in the embodiment of the present invention, Surge Protector includes: electric discharge
Pipe 31 and the varistor 32 being connected in series with discharge tube 31.
It addition, be the effectiveness being further ensured that railway signal cable 10 earthing mode, at Lightning Transient bar
Under part, the impact of Surge Protector 30 limits voltage (alternatively referred to as protecting voltage) less than railway signal electricity
The heart yearn 106 of cable 10 and the impulse withstand voltage of cable metal oversheath 11.
Further, under the conditions of power frequency, less than the railway signal cable 10 of preset length at Through ground wire 20
Under the coupling of middle maximum traction current, when the one of the cable metal oversheath 11 of this railway signal cable 10
When end connects Through ground wire 20, at the other end of the cable metal oversheath 11 of this railway signal cable 10
Accumulation voltage less than the maximum continuous operating voltage of Surge Protector 30.
Wherein, preset length is 2km.
It should be noted that be the effectiveness ensureing railway signal cable 10 earthing mode, the present invention is the most right
The startup time of Surge Protector 30 is limited.
The startup time of Surge Protector 30 need to be less than Preset Time, the concrete numerical basis of this Preset Time
Depending on being actually needed, such as 10ms, the present invention does not limits at this.
Finally, in addition it is also necessary to explanation, in this article, the relational terms of such as first and second or the like
It is used merely to separate an entity or operation with another entity or operating space, and not necessarily requires
Or imply relation or the order that there is any this reality between these entities or operation.And, art
Language " includes ", " comprising " or its any other variant are intended to comprising of nonexcludability, thus
Make to include that the process of a series of key element, method, article or equipment not only include those key elements, and
Also include other key elements being not expressly set out, or also include for this process, method, article or
The key element that person's equipment is intrinsic.In the case of there is no more restriction, by statement " including ... "
The key element limited, it is not excluded that also deposit in including the process of described key element, method, article or equipment
In other identical element.
In this specification, each embodiment uses the mode gone forward one by one to describe, and each embodiment stresses
Being the difference with other embodiments, between each embodiment, identical similar portion sees mutually.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses
The present invention.Multiple amendment to these embodiments will be aobvious and easy for those skilled in the art
See, generic principles defined herein can without departing from the spirit or scope of the present invention,
Realize in other embodiments.Therefore, the present invention is not intended to be limited to the embodiments shown herein,
And it is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (8)
1. a railway signal cable earthed system, it is characterised in that including: railway signal cable, pass through
Logical ground wire and the Surge Protector with the quantity such as the segments of described railway signal cable；
One end of the cable metal oversheath of each section of cable of described railway signal cable is directly connected to described
Through ground wire, the other end of described cable metal oversheath connects described by a described Surge Protector
Through ground wire.
Cable grounding system the most according to claim 1, it is characterised in that described Surge Protector
Including: discharge tube and the varistor being connected in series with described discharge tube.
Cable grounding system the most according to claim 1, it is characterised in that described Surge Protector
For votage limit type Surge Protector.
Cable grounding system the most according to claim 1, it is characterised in that in Lightning Transient condition
Under, the impact of described Surge Protector limits voltage and is less than the heart yearn of described railway signal cable and described electricity
The impulse withstand voltage of cable metallic jacket.
Cable grounding system the most according to claim 1, it is characterised in that under the conditions of power frequency,
Less than the coupling of maximum traction current in described Through ground wire of the described railway signal cable of preset length
Under, when one end of the cable metal oversheath of this railway signal cable connects described Through ground wire, at this
The accumulation voltage of the other end of the cable metal oversheath of railway signal cable is less than described Surge Protector
Maximum continuous operating voltage.
Cable grounding system the most according to claim 5, it is characterised in that described preset length is
2km。
Cable grounding system the most according to claim 1, it is characterised in that described Surge Protector
The startup time less than Preset Time.
Cable grounding system the most according to claim 7, it is characterised in that described Preset Time is
10ms。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610439803.6A CN105958459A (en) | 2016-06-17 | 2016-06-17 | Railway signal cable grounding system |
| PCT/CN2017/085684 WO2017215424A1 (en) | 2016-06-17 | 2017-05-24 | Railway signal cable grounding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610439803.6A CN105958459A (en) | 2016-06-17 | 2016-06-17 | Railway signal cable grounding system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105958459A true CN105958459A (en) | 2016-09-21 |
Family
ID=56906882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610439803.6A Pending CN105958459A (en) | 2016-06-17 | 2016-06-17 | Railway signal cable grounding system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105958459A (en) |
| WO (1) | WO2017215424A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017215424A1 (en) * | 2016-06-17 | 2017-12-21 | 北京全路通信信号研究设计院集团有限公司 | Railway signal cable grounding system |
| CN117766219A (en) * | 2023-12-27 | 2024-03-26 | 江苏港通电缆有限公司 | Three-phase cable and self-adaptive surge voltage monitoring device thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204834145U (en) * | 2015-06-26 | 2015-12-02 | 周国文 | Former electrical system's shielded cable ground structure |
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| SU681461A1 (en) * | 1977-12-28 | 1979-08-25 | Московский Электротехнический Институт Связи | Cable communication line |
| US5721662A (en) * | 1992-07-29 | 1998-02-24 | Act Communications, Inc. | Floating ground isolator for a communications cable locating system |
| CN2323457Y (en) * | 1997-12-12 | 1999-06-09 | 陈斌 | High frequency signal line lightning arrester |
| US20130087384A1 (en) * | 2011-10-10 | 2013-04-11 | Tyco Electronics Corporation | Cable grounding system |
| CN103698653B (en) * | 2013-12-30 | 2016-05-04 | 国家电网公司 | Single-core power cables sheath ground-fault detection system and the method measured based on circulation |
| CN203812641U (en) * | 2014-04-01 | 2014-09-03 | 中国电力工程顾问集团西南电力设计院 | High-voltage single-core cable sheath grounding structure |
| CN105958459A (en) * | 2016-06-17 | 2016-09-21 | 北京全路通信信号研究设计院集团有限公司 | Railway signal cable grounding system |
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2016
- 2016-06-17 CN CN201610439803.6A patent/CN105958459A/en active Pending
-
2017
- 2017-05-24 WO PCT/CN2017/085684 patent/WO2017215424A1/en active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204834145U (en) * | 2015-06-26 | 2015-12-02 | 周国文 | Former electrical system's shielded cable ground structure |
Non-Patent Citations (3)
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| 常媛媛: "高速铁路信号电缆不同接地方式受电磁影响分析", 《铁道通信信号》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017215424A1 (en) * | 2016-06-17 | 2017-12-21 | 北京全路通信信号研究设计院集团有限公司 | Railway signal cable grounding system |
| CN117766219A (en) * | 2023-12-27 | 2024-03-26 | 江苏港通电缆有限公司 | Three-phase cable and self-adaptive surge voltage monitoring device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017215424A1 (en) | 2017-12-21 |
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| PB01 | Publication | ||
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Application publication date: 20160921 |