CN104113002A - High-voltage cable cross interconnection grounding system transfer device - Google Patents
High-voltage cable cross interconnection grounding system transfer device Download PDFInfo
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- CN104113002A CN104113002A CN201410271783.7A CN201410271783A CN104113002A CN 104113002 A CN104113002 A CN 104113002A CN 201410271783 A CN201410271783 A CN 201410271783A CN 104113002 A CN104113002 A CN 104113002A
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Abstract
The invention discloses a high-voltage cable cross interconnection grounding system transfer device, which comprises protectors R1 to R3, current meters A1 to A3, voltage meters V1 to V3, air switches K1 to K6 and wiring terminals P11 to P32. The high-voltage cable cross interconnection grounding system transfer device has the beneficial effects that safe transfer can be carried out between a cross interconnection mode and a direct grounding mode via air switches; the original cable grounding box can be replaced or maintained in the case of live cable, a defected grounding box can be isolated, safe operation of a maintenance person can be ensured, and a new breakthrough of lively maintaining the cable grounding system can be realized; as the device is internally integrated with current meters and voltage meters, live cable detection can be carried out after connection with the cable grounding wire, and the current load state can be intuitively analyzed through display of data of the current meters and the voltage meters in the case of maintenance; and the size is small, and carrying is convenient.
Description
Technical field
The invention belongs to cable grounding system overhaul technical field, relate to the cross interconnected grounding system switching device of a kind of high-tension cable.
Background technology
The major function of high-tension cable protective earthing system is to reduce the induced voltage that operation cable metal protective layer gathers, and by grounding system, gets rid of unnecessary induced current.Single-core high-voltage cable adopts single-point grounding pattern, one end ground connection one end protected mode and cross interconnected pattern more at present.If while running into grounding system fault, after answering cable to have a power failure, grounding system is overhauled.
Earthing box for electric cable is applied in 35kV and above cable grounding system more and uses, and because earthing box for electric cable sealing is poor, construction link is not tight control, and nearlyer earthing box for electric cable Frequent Troubles, cause electrical network to be forced to interruption maintenance.Each interruption maintenance, can cause electrical network single line to have a power failure, and user is caused to great economic loss, and causes discharge pressure to adjacent electrical network.The staff who simultaneously matches with power failure increases, and has a power failure that grid switching operation, maintainer's defect elimination, dispatcher are ordered, circuit personnel protect electricity etc. comprising operations staff, has increased the loss of workload and manpower and materials.
Summary of the invention
Technical problem to be solved by this invention be to provide a kind of can be in the situation that cable be charged to cable protection grounding box, directly grounding box overhaul the cross interconnected grounding system switching device of high-tension cable of replacing operation.
For solving the problems of the technologies described above adopted technical scheme, be: the cross interconnected grounding system switching device of a kind of high-tension cable, comprises protector R1 ~ R3, ammeter A1 ~ A3, voltmeter V1 ~ V3, air switch K1 ~ K6 and binding post P11 ~ P32;
Described voltmeter V1 is connected between described binding post P11 and ground; Described binding post P11 meets described binding post P12 through described ammeter A1, air switch K4 successively; After described protector R1 is in parallel with air switch K1, be connected between described ammeter A1 and the node and ground of air switch K4;
Described voltmeter V2 is connected between described binding post P21 and ground; Described binding post P21 meets described binding post P22 through described ammeter A2, air switch K5 successively; After described protector R2 is in parallel with air switch K2, be connected between described ammeter A2 and the node and ground of air switch K5;
Described voltmeter V3 is connected between described binding post P31 and ground; Described binding post P31 meets described binding post P32 through described ammeter A3, air switch K6 successively; After described protector R3 is in parallel with air switch K3, be connected between described ammeter A3 and the node and ground of air switch K6.
The model of described protector R1 ~ R3 is BHQ-10/400; The model of described ammeter A1 ~ A3 is AOB194Z-8 * 4-3U; The model of described voltmeter V1 ~ V3 is AOB194Z-8 * 4-3U; The model of described air switch K1 ~ K3 is DZ20L-250/4300.
The invention has the beneficial effects as follows: 1, the built-in protector of the present invention and ground structure according to maintenance needs, can carry out safe conversion (a case is multiplex) by switch isolation switch between cross interconnected pattern and direct ground connection pattern; 2, can in the situation that cable be charged, change or overhaul former earthing box for electric cable, the present invention can do temporary earthing device, by being connected with cable grounding line, defect grounding box is isolated, guarantee maintainer's safety work, realized the new breakthrough of hotline maintenance cable grounding system; 3, inner integrated ammeter and voltmeter of the present invention, can carry out banded cable electro-detection after being connected with cable grounding lead-in wire, and shows in the time data by ammeter and voltmeter of overhauling, can the current load condition of intuitive analysis; 4, volume of the present invention is little, easy to carry.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present invention.
Fig. 2 is the principle schematic for carrying out hotline maintenance and monitoring under the cross interconnected protected mode of cable.
In Fig. 2, AJT---A phase cable insulated joint; BJT---B phase cable insulated joint; CJT---C phase cable insulated joint; A---A phase cable; B---B phase cable; C---C phase cable; JCHL---cross interconnected case; A-1, A-2, B-1, B-2, C-1, C-2 are respectively the terminals of cross interconnected grounding box.
Embodiment
Embodiment is as shown in Figure 1 known, and it comprises protector R1 ~ R3, ammeter A1 ~ A3, voltmeter V1 ~ V3, air switch K1 ~ K6 and binding post P11 ~ P32;
Described voltmeter V1 is connected between described binding post P11 and ground; Described binding post P11 meets described binding post P12 through described ammeter A1, air switch K4 successively; After described protector R1 is in parallel with air switch K1, be connected between described ammeter A1 and the node and ground of air switch K4;
Described voltmeter V2 is connected between described binding post P21 and ground; Described binding post P21 meets described binding post P22 through described ammeter A2, air switch K5 successively; After described protector R2 is in parallel with air switch K2, be connected between described ammeter A2 and the node and ground of air switch K5;
Described voltmeter V3 is connected between described binding post P31 and ground; Described binding post P31 meets described binding post P32 through described ammeter A3, air switch K6 successively; After described protector R3 is in parallel with air switch K3, be connected between described ammeter A3 and the node and ground of air switch K6.
The model of described protector R1 ~ R3 is BHQ-10/400; The model of described ammeter A1 ~ A3 is AOB194Z-8 * 4-3U; The model of described voltmeter V1 ~ V3 is AOB194Z-8 * 4-3U; The model of described air switch K1 ~ K3 is DZ20L-250/4300.
The course of work of the present invention is as follows: the major function of high-tension cable protective earthing system is to reduce the induced voltage that operation cable metal protective layer gathers, and by grounding system, gets rid of unnecessary induced current.Single-core high-voltage cable adopts single-point grounding pattern, one end ground connection one end protected mode and cross interconnected pattern more at present.If while running into high-tension cable protective earthing system fault, after answering cable to have a power failure, high-tension cable protective earthing system is overhauled.The present invention be directed to the high-tension cable under the cross interconnected protected mode of cable.
As shown in Figure 2, the A-1 of cross interconnected grounding box connects on the metallic sheath lead-out wire of A phase cable insulated joint left end, and the A-2 of cross interconnected grounding box connects on the metallic sheath lead-out wire of A phase cable insulated joint right-hand member; The B-1 of cross interconnected grounding box connects on the metallic sheath lead-out wire of B phase cable insulated joint left end, and the B-2 of cross interconnected grounding box connects on the metallic sheath lead-out wire of B phase cable insulated joint right-hand member; The C-1 of cross interconnected grounding box connects on the metallic sheath lead-out wire of C phase cable insulated joint left end, and the C-2 of cross interconnected grounding box connects on the metallic sheath lead-out wire of C phase cable insulated joint right-hand member.
If defectiveness in cross interconnected grounding box, needs hotline maintenance.Before the cross interconnected grounding box of maintenance, first air switch K1 of the present invention ~ K3 is disconnected, air switch K4 ~ K6 is closed, be cross interconnected pattern; Secondly earth connection of the present invention is connected with the earth; Then binding post P11 is connected on the metallic sheath lead-out wire of A phase cable insulated joint left end, P22 is connected on the metallic sheath lead-out wire of A phase cable insulated joint right-hand member; Binding post P21 is connected on the metallic sheath lead-out wire of B phase cable insulated joint left end, P32 is connected on the metallic sheath lead-out wire of B phase cable insulated joint right-hand member; Binding post P31 is connected on the metallic sheath lead-out wire of C phase cable insulated joint left end, P12 is connected to (see figure 2) on the metallic sheath lead-out wire of C phase cable insulated joint right-hand member.
After connecting, staff can disconnect defective cross interconnected grounding box and cable, at this moment needs the cross interconnected grounding box of maintenance to be isolated out, makes it reach the condition of safety inspection.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of making within the spirit and principles in the present invention, be equal to and replace and improvement etc., within being all included in protection scope of the present invention.
Claims (2)
1. the cross interconnected grounding system switching device of high-tension cable, is characterized in that: comprise protector R1 ~ R3, ammeter A1 ~ A3, voltmeter V1 ~ V3, air switch K1 ~ K6 and binding post P11 ~ P32;
Described voltmeter V1 is connected between described binding post P11 and ground; Described binding post P11 meets described binding post P12 through described ammeter A1, air switch K4 successively; After described protector R1 is in parallel with air switch K1, be connected between described ammeter A1 and the node and ground of air switch K4;
Described voltmeter V2 is connected between described binding post P21 and ground; Described binding post P21 meets described binding post P22 through described ammeter A2, air switch K5 successively; After described protector R2 is in parallel with air switch K2, be connected between described ammeter A2 and the node and ground of air switch K5;
Described voltmeter V3 is connected between described binding post P31 and ground; Described binding post P31 meets described binding post P32 through described ammeter A3, air switch K6 successively; After described protector R3 is in parallel with air switch K3, be connected between described ammeter A3 and the node and ground of air switch K6.
2. the cross interconnected grounding system switching device of a kind of high-tension cable according to claim 1, is characterized in that: the model of described protector R1 ~ R3 is BHQ-10/400; The model of described ammeter A1 ~ A3 is AOB194Z-8 * 4-3U; The model of described voltmeter V1 ~ V3 is AOB194Z-8 * 4-3U; The model of described air switch K1 ~ K3 is DZ20L-250/4300.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410271783.7A CN104113002B (en) | 2014-06-18 | 2014-06-18 | A kind of high tension cable cross connection grounding system switching device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410271783.7A CN104113002B (en) | 2014-06-18 | 2014-06-18 | A kind of high tension cable cross connection grounding system switching device |
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| CN104113002A true CN104113002A (en) | 2014-10-22 |
| CN104113002B CN104113002B (en) | 2017-04-05 |
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| CN201410271783.7A Active CN104113002B (en) | 2014-06-18 | 2014-06-18 | A kind of high tension cable cross connection grounding system switching device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093527A (en) * | 2016-07-13 | 2016-11-09 | 许继集团有限公司 | The mutual header of intelligent crossover, intelligent interconnection earthed system and earth current monitoring method |
| WO2020078057A1 (en) * | 2018-10-17 | 2020-04-23 | 国网上海市电力公司 | Online correction device and method for power cable cross connection |
| CN112018672A (en) * | 2020-09-16 | 2020-12-01 | 国网江西省电力有限公司南昌供电分公司 | Electrified repair method for cross-connection grounding system of power transmission cable |
| CN113917372A (en) * | 2021-10-18 | 2022-01-11 | 国网江苏省电力有限公司无锡供电分公司 | Method and device for checking cross-connection system in non-unpacking and charged mode |
| CN113937682A (en) * | 2021-11-08 | 2022-01-14 | 国网山东省电力公司临沂供电公司 | Transposition error live-line defect eliminating tool for cross interconnection box |
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| CN201904596U (en) * | 2010-11-17 | 2011-07-20 | 江苏省电力公司苏州供电公司 | General grounding box for cable sheath |
| CN202957567U (en) * | 2012-11-23 | 2013-05-29 | 保定鼎阳电力科技发展有限公司 | Anti-electric-shock intersecting interconnecting protection box |
| CN203180470U (en) * | 2013-04-03 | 2013-09-04 | 国家电网公司 | Intersecting-and-interconnecting cable line |
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| CN103698653A (en) * | 2013-12-30 | 2014-04-02 | 国家电网公司 | System and method for detecting earth fault of sheath of single-core power cable on basis of circulation measurement |
| CN203895836U (en) * | 2014-06-18 | 2014-10-22 | 国家电网公司 | Switching device of cross-connected high-voltage cable grounding system |
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| CN201904596U (en) * | 2010-11-17 | 2011-07-20 | 江苏省电力公司苏州供电公司 | General grounding box for cable sheath |
| CN202957567U (en) * | 2012-11-23 | 2013-05-29 | 保定鼎阳电力科技发展有限公司 | Anti-electric-shock intersecting interconnecting protection box |
| CN203180470U (en) * | 2013-04-03 | 2013-09-04 | 国家电网公司 | Intersecting-and-interconnecting cable line |
| CN103630814A (en) * | 2013-12-11 | 2014-03-12 | 国家电网公司 | Insulating dielectric loss angle tendency online monitoring method of high-voltage cables under cross interconnection |
| CN103698653A (en) * | 2013-12-30 | 2014-04-02 | 国家电网公司 | System and method for detecting earth fault of sheath of single-core power cable on basis of circulation measurement |
| CN203895836U (en) * | 2014-06-18 | 2014-10-22 | 国家电网公司 | Switching device of cross-connected high-voltage cable grounding system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093527A (en) * | 2016-07-13 | 2016-11-09 | 许继集团有限公司 | The mutual header of intelligent crossover, intelligent interconnection earthed system and earth current monitoring method |
| WO2020078057A1 (en) * | 2018-10-17 | 2020-04-23 | 国网上海市电力公司 | Online correction device and method for power cable cross connection |
| CN112018672A (en) * | 2020-09-16 | 2020-12-01 | 国网江西省电力有限公司南昌供电分公司 | Electrified repair method for cross-connection grounding system of power transmission cable |
| CN113917372A (en) * | 2021-10-18 | 2022-01-11 | 国网江苏省电力有限公司无锡供电分公司 | Method and device for checking cross-connection system in non-unpacking and charged mode |
| CN113917372B (en) * | 2021-10-18 | 2023-09-15 | 国网江苏省电力有限公司无锡供电分公司 | Method and device for checking cross interconnection system without unpacking |
| CN113937682A (en) * | 2021-11-08 | 2022-01-14 | 国网山东省电力公司临沂供电公司 | Transposition error live-line defect eliminating tool for cross interconnection box |
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|---|---|
| CN104113002B (en) | 2017-04-05 |
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