CN103280744B - A kind of for 35kV midium voltage cable patch method straitly - Google Patents

A kind of for 35kV midium voltage cable patch method straitly Download PDF

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Publication number
CN103280744B
CN103280744B CN201310170072.6A CN201310170072A CN103280744B CN 103280744 B CN103280744 B CN 103280744B CN 201310170072 A CN201310170072 A CN 201310170072A CN 103280744 B CN103280744 B CN 103280744B
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China
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cable
connecting plate
red copper
copper connecting
straitly
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CN201310170072.6A
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CN103280744A (en
Inventor
高英俊
徐冰亮
于海洋
吕飞孔
董尔佳
陈晓光
武国良
张明江
陈继开
王凤军
刘彧浩
师广志
田崇瑞
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Heilongjiang Electric Power Co Ltd
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Heilongjiang Electric Power Co Ltd
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Abstract

For a 35kV midium voltage cable patch method straitly, belong to mesohigh wiring technique field.The invention solves transformer well interior due to narrow space, cause high-voltage line terminal connections difficulty, and the problem of damage can be caused original cable socket.Method is: cluster parachute place 35kv high-tension insulating bushing being enclosed within a cable to be connected; Three cable sockets to be connected are fixedly connected with three connecting holes of red copper connecting plate with bolt respectively; With semi-conducting material, all exposed metallic member near three cable sockets and red copper connecting plate is carried out covering parcel, with insulating tape, semi-conducting material is fixed; By 35kv high-tension insulating bushing to red copper connecting plate one side stretching, until cover all cable sockets of parcel and red copper connecting plate; High-tension insulating bushing carried out tie up fixing with band; The top that red copper connecting plate band is fixed on an insulator is completed patch.The present invention is applicable to the interim connection of midium voltage cable in narrow wet spaces.

Description

A kind of for 35kV midium voltage cable patch method straitly
Technical field
The invention belongs to mesohigh wiring technique field, the midium voltage cable being specifically related to need to connect 35kV or below 35kV electric pressure in narrow wet spaces connects temporarily.
Background technology
Narrow space in transformer well, and due to rainwater season, in well, ground has skim water, well humidity is very large.Meanwhile, owner proposes another one exacting terms, after completing test, recover original wiring, and ensures that former cable is not subject to any damage, and this brings challenge to the mode of connection.In a wet environment, the distance of 35kV line terminals is maximum when only having 20cm, and it is interconnected to complete three high-tension cable terminations, and does not damage original cable socket, cannot realize under traditional wired mode in the past.In the design of most of similar wind energy turbine set, in order to reduce costs, often not reserved unnecessary bus bar tie point in case becomes.The 35kv high pressure connecting cabinet can bought on the market, but individual huge, the working space that some are narrow cannot be put into, middle compression bonded line case cannot be put into narrow and small transformer well, with rainproof, and also expensive.Temporary service as low voltage crossing, is starved of a kind of safe and reliable construction method.
Summary of the invention
The present invention, in order to solve in transformer well due to narrow space, cause high-voltage line terminal connections difficulty, and can cause the problem of damage to original cable socket, propose a kind of for 35kV midium voltage cable patch method straitly.
A kind of for 35kV midium voltage cable patch method straitly, the threephase cable terminals that the method is applicable to being positioned at transformer well carry out patch, supporting steel frame is had in described transformer well, this supporting steel frame is provided with three insulators, the patch method of every phase cable is identical, and wherein the mode of connection of a phase cable is:
Step one: by the cluster parachute place pressing insulating sleeve to be enclosed within a cable to be connected in 35kv;
Step 2: three cable sockets to be connected are fixedly connected with three connecting holes of red copper connecting plate with bolt respectively;
Step 3: with semi-conducting material, all exposed metallic member near three cable sockets and red copper connecting plate is carried out covering parcel, and with insulating tape, semi-conducting material is fixed;
Step 4: will insulating sleeve be pressed in 35kv to red copper connecting plate one side stretching, until press insulating sleeve to cover all cable sockets of parcel and red copper connecting plate in this;
Step 5: fixing by pressing insulating sleeve to carry out in 35kv to tie up with band;
Step 6: the top that red copper connecting plate band is fixed on an insulator is completed patch.
The cable that in moist atmosphere complete 35KV cable of the present invention under interval only has 20cm situation connects, and achieve the interconnected of three terminations when not damaging original high-tension cable termination, after interim connection is finished, original connection can be recovered, damage is not caused to original cable socket.
This simple connected mode of the present invention completes on the basis of further investigation electrion, the method have studied structure and the principle of standard high-voltage cable socket simultaneously, and the high-tension cable interconnection structure of joint and principle, it is simple that the method has structure, construction easily, the advantage such as cheap, through the inspection of the LVRT type approval test in July, 2012 to November, proves that connected mode is extremely successful.
The present invention has run on the blower fan of wind field or the power supply unit of other industry, and need the interim midium voltage cable connecting below 35kV electric pressure, a transformer well is arranged at the bottom due to box type transformer, so the method for the invention has the wider scope of application.
Accompanying drawing explanation
Fig. 1 is a kind of flow chart for 35kV midium voltage cable patch method straitly described in embodiment one;
Fig. 2 is the elementary diagram of method described in embodiment one;
Fig. 3 is the structure chart of the red copper connecting plate described in embodiment one;
Fig. 4 is the structure structural representation that the method for the invention cable connects.
Embodiment
Embodiment one: present embodiment is described see Fig. 1, Fig. 2 and Fig. 4, a kind of for 35kV midium voltage cable patch method straitly described in present embodiment, the threephase cable terminals that the method is applicable to being positioned at transformer well carry out patch, supporting steel frame 6 is had in described transformer well, this supporting steel frame 6 is provided with three insulators 5, the patch method of every phase cable is identical, and wherein the mode of connection of a phase cable is:
Step one: by the cluster parachute place pressing insulating sleeve 1 to be enclosed within a cable to be connected in 35kv;
Step 2: three cable sockets 4 to be connected are fixedly connected with three connecting holes of red copper connecting plate 3 with bolt respectively;
Step 3: with semi-conducting material 2, all exposed metallic member near three cable sockets 4 and red copper connecting plate 3 is carried out covering parcel, and with insulating tape, semi-conducting material 2 is fixed;
Step 4: will insulating sleeve 1 be pressed in 35kv to red copper connecting plate 3 one side stretching, until press insulating sleeve 1 to cover all cable sockets 4 of parcel and red copper connecting plate 3 in this;
Step 5: fixing by pressing insulating sleeve 1 to carry out in 35kv to tie up with band;
Step 6: red copper connecting plate 3 top that band is fixed on an insulator 5 is completed patch.
The dismounting of the cable socket 4 that the patch method described in present embodiment connects is very simple, cut off pressing insulating sleeve 1 in 35kv, semi-conducting material 2 is dismantled, and takes the cable that the bolt be connected with copper plate can recover original needs connection apart, do not damage original cable socket 4.
Insulator 5 Support Position one in step 6 fixes on cable terminal junction, can not in the cluster parachute position of cable socket 4 or stress tube position.
The present invention adopts semi-conducting material 2 to concentrate position to disperse the electric field stress of cable junction, reduces the electric field strength of local, adopts in 35kv and presses insulating sleeve 1, protected junction, and elongated by the spacing distance of air, plays the object increasing insulation.
Embodiment two: present embodiment is to a kind of further restriction for 35kV midium voltage cable patch method straitly described in embodiment one, red copper connecting plate 3 in described step 2 is length is 180mm to 210mm, wide is 80mm to 110mm, and thickness is the copper plate of 6mm to 9mm.
Embodiment three: present embodiment is described see Fig. 3, present embodiment is to a kind of further restriction for 35kV midium voltage cable patch method straitly described in embodiment two, red copper connecting plate 3 in described step 2 is long is 200mm, wide is 100mm, and thickness is the copper plate of 8mm.
Embodiment four, present embodiment is to a kind of further restriction for 35kV midium voltage cable patch method straitly described in embodiment one, four angles of described red copper connecting plate 3 are four/half round angle, and described half radius of a circle is 8mm-12mm, preferred 10mm.
Embodiment five, present embodiment is to a kind of further restriction for 35kV midium voltage cable patch method straitly described in embodiment four, the radius of the connecting hole on described red copper connecting plate 3 is 4.5mm to 7.5mm, is preferably 6.5mm.
Embodiment six: present embodiment is to a kind of further restriction for 35kV midium voltage cable patch method straitly described in embodiment one, shimming and bullet pad when the cable socket 4 in described step 2 is fixed with red copper connecting plate 3.

Claims (8)

1. one kind for 35kV midium voltage cable patch method straitly, the threephase cable terminals that the method is applicable to being positioned at transformer well carry out patch, supporting steel frame (6) is had in described transformer well, this supporting steel frame (6) is provided with three insulators (5), the patch method of every phase cable is identical, it is characterized in that, wherein the mode of connection of a phase cable is:
Step one: by the cluster parachute place pressing insulating sleeve (1) to be enclosed within a cable to be connected in 35kv;
Step 2: use bolt to be fixedly connected with three connecting holes of red copper connecting plate (3) respectively three cable sockets to be connected (4);
Step 3: with semi-conducting material (2), all exposed metallic member near three cable sockets (4) and red copper connecting plate (3) is carried out covering parcel, and with insulating tape, semi-conducting material (2) is fixed;
Step 4: will insulating sleeve (1) be pressed in 35kv to red copper connecting plate (3) side stretching, until press insulating sleeve (1) to cover all cable sockets of parcel (4) and red copper connecting plate (3) in this 35KV;
Step 5: fixing by pressing insulating sleeve (1) to carry out in 35kv to tie up with band;
Step 6: red copper connecting plate (3) top that band is fixed on an insulator (5) is completed patch.
2. according to claim 1 a kind of for 35kV midium voltage cable patch method straitly, it is characterized in that, red copper connecting plate (3) in described step 2 is length is 180mm to 210mm, and wide is 80mm to 110mm, and thickness is the copper plate of 6mm to 9mm.
3. according to claim 2ly a kind ofly to it is characterized in that for 35kV midium voltage cable patch method straitly, the red copper connecting plate (3) in described step 2 for long be 200mm, wide is 100mm, and thickness is the copper plate of 8mm.
4. according to claim 1 and 2 a kind of for 35kV midium voltage cable patch method straitly, it is characterized in that, each angle at four angles of described red copper connecting plate (3) is round 1/4th, and described radius of a circle is 8mm-12mm.
5. according to claim 4 a kind of for 35kV midium voltage cable patch method straitly, it is characterized in that, described radius of a circle is 10mm.
6. according to claim 1 and 2ly a kind ofly to it is characterized in that for 35kV midium voltage cable patch method straitly, the radius of the connecting hole on described red copper connecting plate (3) is 4.5mm to 7.5mm.
7. according to claim 6ly a kind ofly to it is characterized in that for 35kV midium voltage cable patch method straitly, the radius of the connecting hole on described red copper connecting plate (3) is 6.5mm.
8. according to claim 1ly a kind ofly to it is characterized in that for 35kV midium voltage cable patch method straitly, shimming and bullet pad when the cable socket (4) in described step 2 is fixing with red copper connecting plate (3).
CN201310170072.6A 2013-05-09 2013-05-09 A kind of for 35kV midium voltage cable patch method straitly Active CN103280744B (en)

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Publication number Priority date Publication date Assignee Title
CN110011164B (en) * 2019-04-24 2020-06-09 江西远大科技有限公司 Novel 10kV high-capacity overhead line lead butt joint method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101267091A (en) * 2007-03-16 2008-09-17 Abb技术有限公司 Operation method of lifetime sealed compact secondary substation
CN101794973A (en) * 2010-04-07 2010-08-04 绵阳电业局 Live working method for replacing distribution transformer

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5414754B2 (en) * 2011-08-26 2014-02-12 昭和電線ケーブルシステム株式会社 Plug-in bushing and withstand voltage test method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101267091A (en) * 2007-03-16 2008-09-17 Abb技术有限公司 Operation method of lifetime sealed compact secondary substation
CN101794973A (en) * 2010-04-07 2010-08-04 绵阳电业局 Live working method for replacing distribution transformer

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