CN103022940A - Cable junction box and cable online monitoring method - Google Patents
Cable junction box and cable online monitoring method Download PDFInfo
- Publication number
- CN103022940A CN103022940A CN201210565037XA CN201210565037A CN103022940A CN 103022940 A CN103022940 A CN 103022940A CN 201210565037X A CN201210565037X A CN 201210565037XA CN 201210565037 A CN201210565037 A CN 201210565037A CN 103022940 A CN103022940 A CN 103022940A
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- Prior art keywords
- cable
- monitoring
- wire
- line
- straight joint
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 239000004020 conductor Substances 0.000 claims abstract description 9
- 238000005070 sampling Methods 0.000 claims abstract description 7
- 239000012212 insulator Substances 0.000 claims description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 230000004888 barrier function Effects 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
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- Locating Faults (AREA)
- Electric Cable Installation (AREA)
Abstract
The invention discloses a cable junction box, comprising: the monitoring wire is wrapped by an insulating layer, and the middle part of the monitoring wire is separated from the insulating base. The invention also discloses a cable on-line monitoring method, which adopts the metal braided wire to lead out the grounding wire of the cable conductor shielding layer in the ring main unit to the grounding outgoing wire junction box for the cable on-line monitoring to be grounded, sleeves the sampling mutual inductor at the middle part of the monitoring wire on the grounding outgoing wire junction box for the shielding layer for the cable on-line monitoring, and utilizes the monitoring instrument to carry out the cable on-line monitoring. The shielding layer grounding outgoing line junction box for cable online monitoring and the cable online monitoring method provided by the invention can realize uninterrupted online monitoring of the cable terminal in the ring main unit under the condition of complying with the existing five-prevention standard.
Description
Technical field
The present invention relates to electric power system on-line monitoring of cable field, relate in particular to a kind of cable straight joint and on-line monitoring of cable method.
Background technology
In the distribution scope, charged on-line monitoring is to find that in time there is the comparatively effective means of defective or potential weak link in the 10kV cable, on-line monitoring method of the prior art is directly to be enclosed within the sampling instrument transformer on the trichotomous phase line of cable terminal or to be enclosed within the ground outlet of cable terminal, then the local discharge signal of cable is monitored.Be enclosed within the sampling instrument transformer on the trichotomous phase line of cable terminal or need to open ring main unit cabinet door in the ground outlet of cable terminal the time and just can finish, because of " five prevent " requirement, open the operation that need to have a power failure of ring main unit cabinet door, power failure must affect reliably.Therefore, from truly, also do not realize real live monitoring.We seek and not only to observe existing " five is anti-" standard but also on-line monitoring of cable method that can be in charged situation with regard to an urgent demand for this.
Summary of the invention
Technical problem to be solved by this invention is: a kind of cable straight joint and on-line monitoring of cable method that can really realize the charged on-line monitoring of cable is provided.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of cable straight joint comprises: insulator foot, and at least one monitoring wire that two ends link to each other with described insulator foot by binding post, described monitoring wire is surrounded by insulating barrier outward, and mid portion separates with described insulator foot.
Described monitoring wire can be copper core, iron core or aluminium core.
Described insulator foot can be wooden, polymethyl methacrylate system or pottery system.
The present invention also provides a kind of method of on-line monitoring of cable, may further comprise the steps:
The earth connection of ring main unit inner cable conductor shield is prolonged with metal knitted line at the lead-out wire of tag, be enclosed within on described lead-out wire and the metal knitted line with heat-shrinkable T bush;
Described metal knitted line is caused outside the described ring main unit, link to each other with the binding post of described on-line monitoring of cable with shielding layer grounding lead-out wire terminal box, the lightning arrester in the described ring main unit or the earth connection of other secondary lines remain unchanged;
With the other end binding post of the monitoring wire that connects on the described binding post by wire ground connection;
With measuring the mid portion that is enclosed within described monitoring wire with the sampling instrument transformer, utilize monitoring instrument to carry out on-line monitoring of cable.
Described metal knitted line can be for zinc-plated copper soft litzendraht wire.
On-line monitoring of cable provided by the invention can be realized the cable terminal in the ring main unit is being observed under existing " five is anti-" standard with shielding layer grounding lead-out wire terminal box and on-line monitoring of cable method, and on-line monitoring does not have a power failure.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the stereogram of cable straight joint provided by the invention;
Fig. 2 is the profile of cable straight joint provided by the invention.
Embodiment
Below with reference to accompanying drawing the preferred embodiments of the present invention are described.
Embodiment one
The stereogram of cable straight joint provided by the invention as shown in Figure 1, its profile comprises as shown in Figure 2: insulator foot, at least one monitoring wire that two ends link to each other with described insulator foot by binding post, described monitoring wire is surrounded by insulating barrier outward, and mid portion separates with described insulator foot.
Described monitoring wire can be copper core, iron core or aluminium core.
Described insulator foot is wooden, polymethyl methacrylate system or pottery system.
On-line monitoring of cable in the present embodiment contains 4 monitoring wires with shielding layer grounding lead-out wire terminal box, be respectively, be connected to the monitoring wire AA1 on binding post A and the A1, be connected to the monitoring wire BB1 on binding post B and the B1, be connected to the monitoring wire CC1 on binding post C and the C1, be connected to the monitoring wire DD1 on post D and the D1.Monitoring wire AA1, BB1, CC1 and DD1 are surrounded by insulating barrier outward, and mid portion is curved to arch upward, and separates with insulator foot.Binding post A, B, C and D are used for being connected with cable conductor shielding conductor in the ring main unit; Binding post A1, B1, C1 and D1 are used for ground connection.
Embodiment two
Present embodiment provides the cable straight joint among a kind of embodiment of employing one to realize the method for on-line monitoring of cable, take four monitoring cables as example, may further comprise the steps:
The earth connection of four cable conductor screens in the ring main unit is prolonged with metal knitted line at the lead-out wire of tag, metal knitted line can be for zinc-plated copper soft litzendraht wire, be enclosed within on described lead-out wire and the metal knitted line with heat-shrinkable T bush;
Four metal knitted lines are caused outside the described ring main unit, binding post A, B, C and D with shielding layer grounding lead-out wire terminal box links to each other respectively with on-line monitoring of cable among the embodiment one, and the lightning arrester in the described ring main unit or the earth connection of other secondary lines remain unchanged;
Use binding post A1, B1, C1 and the D1 of shielding layer grounding lead-out wire terminal box by wire ground connection on-line monitoring of cable;
To measure the mid portion that is enclosed within the monitoring wire on the on-line monitoring of cable usefulness shielding layer grounding lead-out wire terminal box among the embodiment one with the sampling instrument transformer, that is, AA1, BB1, CC1 and DD1 part utilize monitoring instrument to carry out on-line monitoring of cable.
The local discharge signal of cable can conduct by the copper shield of cable conductor, the committed step of on-line monitoring of cable is that the monitoring cable conductor is to the local discharge signal of copper shield, the copper shield two ends of conductor are connected to the wiring binding post A of the on-line monitoring of cable usefulness shielding layer grounding lead-out wire terminal box outside ring main unit by the ground lead of terminal fitting, B, on C and the D, measure with the sampling instrument transformer and be enclosed within monitoring wire AA1 on the on-line monitoring of cable usefulness shielding layer grounding lead-out wire terminal box, BB1, CC1 and DD1 part just can monitor the partial discharge situation of the cable line of each unit cabinet, thereby carry out charged on-line monitoring.
The on-line monitoring of cable that provides of the embodiment of the invention can be realized the cable terminal in the ring main unit unit is being observed under existing " five is anti-" standard with shielding layer grounding lead-out wire terminal box and on-line monitoring of cable method, and on-line monitoring does not have a power failure.Shenzhen power supply administration distribution network cable circuit has 5396, calculates according to 15 families on each bar circuit at present, if carrying out an on-line monitoring to cable line, have a power failure each year, and each transient-power failure 30 minutes, amount reaches 40470 when then having a power failure.By the reconfiguration of cable terminal shielding layer grounding lead-out wire, amount reached 40470, many amount of power supply 1214100 kilowatt hours when then each year saved power failure.
Above disclosed is preferred embodiment of the present invention only, certainly can not limit with this interest field of the present invention, and the equivalent variations of therefore doing according to claim of the present invention still belongs to the scope that the present invention is contained.
Claims (9)
1. a cable straight joint is characterized in that, comprising: insulator foot, and at least one monitoring wire that two ends link to each other with described insulator foot by binding post, described monitoring wire is surrounded by insulating barrier outward, and mid portion separates with described insulator foot.
2. cable straight joint as claimed in claim 1 is characterized in that, described monitoring wire is the copper core.
3. cable straight joint as claimed in claim 1 is characterized in that, described monitoring wire is iron core.
4. cable straight joint as claimed in claim 1 is characterized in that, described monitoring wire is the aluminium core.
5. cable straight joint as claimed in claim 1 is characterized in that, described insulator foot is wooden.
6. cable straight joint as claimed in claim 1 is characterized in that, described insulator foot is polymethyl methacrylate system.
7. cable straight joint as claimed in claim 1 is characterized in that, described insulator foot is the pottery system.
8. an on-line monitoring of cable method is characterized in that, may further comprise the steps:
The earth connection of ring main unit inner cable conductor shield is prolonged with metal knitted line at the lead-out wire of tag, be enclosed within on described lead-out wire and the metal knitted line with heat-shrinkable T bush;
Described metal knitted line is caused outside the described ring main unit, link to each other with the binding post of any one on-line monitoring of cable in the claim 1 to 7 with shielding layer grounding lead-out wire terminal box, the lightning arrester in the described ring main unit or the earth connection of other secondary lines remain unchanged;
With the other end binding post of the monitoring wire that connects on the described binding post by wire ground connection;
With measuring the mid portion that is enclosed within described monitoring wire with the sampling instrument transformer, utilize monitoring instrument to carry out on-line monitoring of cable.
9. the method for on-line monitoring of cable as claimed in claim 8 is characterized in that, described metal knitted line is the zinc-plated soft litzendraht wire of copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210565037.XA CN103022940B (en) | 2012-12-24 | 2012-12-24 | Cable junction box and cable online monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210565037.XA CN103022940B (en) | 2012-12-24 | 2012-12-24 | Cable junction box and cable online monitoring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103022940A true CN103022940A (en) | 2013-04-03 |
| CN103022940B CN103022940B (en) | 2016-09-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210565037.XA Active CN103022940B (en) | 2012-12-24 | 2012-12-24 | Cable junction box and cable online monitoring method |
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| Country | Link |
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| CN (1) | CN103022940B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429750A (en) * | 2019-09-09 | 2019-11-08 | 周封 | The intelligent electric machine terminal box of integrated prepackage type internet of things sensors |
| CN112630131A (en) * | 2020-12-01 | 2021-04-09 | 深圳供电局有限公司 | Device and method for testing waterproof performance of cable intermediate joint |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS629277A (en) * | 1985-07-05 | 1987-01-17 | Asahi Eng Kk | Diagnostic method for cable insulation under hotline |
| CN201765301U (en) * | 2010-09-09 | 2011-03-16 | 广东电网公司中山供电局 | Online monitor apparatus for partial discharge of transformer |
| CN202276085U (en) * | 2011-11-01 | 2012-06-13 | 大亚电器集团有限公司 | Fully-insulated metal ring net cabinet |
| CN102540034A (en) * | 2012-03-16 | 2012-07-04 | 甘肃电力科学研究院 | High-voltage transformer bushing tap grounding on-line monitoring device |
| CN202503231U (en) * | 2012-03-12 | 2012-10-24 | 中国建筑东北设计研究院有限公司 | Junction box with built-in terminal |
| CN202997455U (en) * | 2012-12-24 | 2013-06-12 | 深圳供电局有限公司 | Cable junction box |
-
2012
- 2012-12-24 CN CN201210565037.XA patent/CN103022940B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS629277A (en) * | 1985-07-05 | 1987-01-17 | Asahi Eng Kk | Diagnostic method for cable insulation under hotline |
| CN201765301U (en) * | 2010-09-09 | 2011-03-16 | 广东电网公司中山供电局 | Online monitor apparatus for partial discharge of transformer |
| CN202276085U (en) * | 2011-11-01 | 2012-06-13 | 大亚电器集团有限公司 | Fully-insulated metal ring net cabinet |
| CN202503231U (en) * | 2012-03-12 | 2012-10-24 | 中国建筑东北设计研究院有限公司 | Junction box with built-in terminal |
| CN102540034A (en) * | 2012-03-16 | 2012-07-04 | 甘肃电力科学研究院 | High-voltage transformer bushing tap grounding on-line monitoring device |
| CN202997455U (en) * | 2012-12-24 | 2013-06-12 | 深圳供电局有限公司 | Cable junction box |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429750A (en) * | 2019-09-09 | 2019-11-08 | 周封 | The intelligent electric machine terminal box of integrated prepackage type internet of things sensors |
| CN112630131A (en) * | 2020-12-01 | 2021-04-09 | 深圳供电局有限公司 | Device and method for testing waterproof performance of cable intermediate joint |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103022940B (en) | 2016-09-21 |
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