CN104113004A - High-voltage cable protection grounding system transfer device - Google Patents
High-voltage cable protection grounding system transfer device Download PDFInfo
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- CN104113004A CN104113004A CN201410271847.3A CN201410271847A CN104113004A CN 104113004 A CN104113004 A CN 104113004A CN 201410271847 A CN201410271847 A CN 201410271847A CN 104113004 A CN104113004 A CN 104113004A
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Abstract
The invention discloses a high-voltage cable protection grounding system transfer device, which comprises a first transfer unit U1 and a second transfer unit U2. The device has the beneficial effects that the device is internally provided with a protector and a grounding structure, according to maintenance demands, safe transfer (one box for multiple purposes) can be carried out between a protection 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, the device can serve as a temporary grounding device, a defected grounding box can be isolated through connection with a cable grounding line, 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 a kind of high-tension cable protective earthing system switching device.
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 high-tension cable protective earthing system switching device of replacing operation.
For solving the problems of the technologies described above adopted technical scheme, be: a kind of high-tension cable protective earthing system switching device, comprises the first adapter U1 and the second adapter U2;
Described the first adapter U1 comprises protector R1-1 ~ R1-3, ammeter A1-1 ~ A1-3, voltmeter V1-1 ~ V1-3 and air switch K1-1 ~ K1-3; Described the second adapter U2 comprises protector R2-1 ~ R2-3, ammeter A2-1 ~ A2-3, voltmeter V2-1 ~ V2-3 and air switch K2-1 ~ K2-3;
Described protector R1-1 is connected on after connecting with ammeter A1-1 between the A phase metallic sheath and ground of cable protection grounding box side; Described voltmeter V1-1 is in parallel with the series circuit of ammeter A1-1 with described protector R1-1; Described air switch K1-1 is in parallel with described protector R1-1;
Described protector R1-2 is connected on after connecting with ammeter A1-2 between the B phase metallic sheath and ground of cable protection grounding box side; Described voltmeter V1-2 is in parallel with the series circuit of ammeter A1-2 with described protector R1-2; Described air switch K1-2 is in parallel with described protector R1-2;
Described protector R1-3 is connected on after connecting with ammeter A1-3 between the C phase metallic sheath and ground of cable protection grounding box side; Described voltmeter V1-3 is in parallel with the series circuit of ammeter A1-3 with described protector R1-3; Described air switch K1-3 is in parallel with described protector R1-3;
Described protector R2-1 is connected on after connecting with ammeter A2-1 between the A phase metallic sheath and ground of the direct grounding box side of cable; Described voltmeter V2-1 is in parallel with the series circuit of ammeter A2-1 with described protector R2-1; Described air switch K2-1 is in parallel with described protector R2-1;
Described protector R2-2 is connected on after connecting with ammeter A2-2 between the B phase metallic sheath and ground of the direct grounding box side of cable; Described voltmeter V2-2 is in parallel with the series circuit of ammeter A2-2 with described protector R2-2; Described air switch K2-2 is in parallel with described protector R2-2;
Described protector R2-3 is connected on after connecting with ammeter A2-3 between the C phase metallic sheath and ground of the direct grounding box side of cable; Described voltmeter V2-3 is in parallel with the series circuit of ammeter A2-3 with described protector R2-3; Described air switch K2-3 is in parallel with described protector R2-3.
The model of described protector R1-1 ~ R1-3 and protector R2-1 ~ R2-3 is BHQ-10/400; The model of described ammeter A1-1 ~ A1-3 and ammeter A2-1 ~ A2-3 is AOB194Z-8 * 4-3U; The model of described voltmeter V1-1 ~ V1-3 and voltmeter V2-1 ~ V2-3 is AOB194Z-8 * 4-3U; The model of described air switch K1-1 ~ K1-3 and air switch K2-1 ~ K2-3 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 air switch in protected mode 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.
In Fig. 1, BHJD is cable protection grounding box; ZJJD is the direct grounding box of cable.
Embodiment
Embodiment is as shown in Figure 1 known, and it comprises the first adapter U1 and the second adapter U2;
Described the first adapter U1 comprises protector R1-1 ~ R1-3, ammeter A1-1 ~ A1-3, voltmeter V1-1 ~ V1-3 and air switch K1-1 ~ K1-3; Described the second adapter U2 comprises protector R2-1 ~ R2-3, ammeter A2-1 ~ A2-3, voltmeter V2-1 ~ V2-3 and air switch K2-1 ~ K2-3;
Described protector R1-1 is connected on after connecting with ammeter A1-1 between the A phase metallic sheath and ground of cable protection grounding box side; Described voltmeter V1-1 is in parallel with the series circuit of ammeter A1-1 with described protector R1-1; Described air switch K1-1 is in parallel with described protector R1-1;
Described protector R1-2 is connected on after connecting with ammeter A1-2 between the B phase metallic sheath and ground of cable protection grounding box side; Described voltmeter V1-2 is in parallel with the series circuit of ammeter A1-2 with described protector R1-2; Described air switch K1-2 is in parallel with described protector R1-2;
Described protector R1-3 is connected on after connecting with ammeter A1-3 between the C phase metallic sheath and ground of cable protection grounding box side; Described voltmeter V1-3 is in parallel with the series circuit of ammeter A1-3 with described protector R1-3; Described air switch K1-3 is in parallel with described protector R1-3;
Described protector R2-1 is connected on after connecting with ammeter A2-1 between the A phase metallic sheath and ground of the direct grounding box side of cable; Described voltmeter V2-1 is in parallel with the series circuit of ammeter A2-1 with described protector R2-1; Described air switch K2-1 is in parallel with described protector R2-1;
Described protector R2-2 is connected on after connecting with ammeter A2-2 between the B phase metallic sheath and ground of the direct grounding box side of cable; Described voltmeter V2-2 is in parallel with the series circuit of ammeter A2-2 with described protector R2-2; Described air switch K2-2 is in parallel with described protector R2-2;
Described protector R2-3 is connected on after connecting with ammeter A2-3 between the C phase metallic sheath and ground of the direct grounding box side of cable; Described voltmeter V2-3 is in parallel with the series circuit of ammeter A2-3 with described protector R2-3; Described air switch K2-3 is in parallel with described protector R2-3.
The model of described protector R1-1 ~ R1-3 and protector R2-1 ~ R2-3 is BHQ-10/400; The model of described ammeter A1-1 ~ A1-3 and ammeter A2-1 ~ A2-3 is AOB194Z-8 * 4-3U; The model of described voltmeter V1-1 ~ V1-3 and voltmeter V2-1 ~ V2-3 is AOB194Z-8 * 4-3U; The model of described air switch K1-1 ~ K1-3 and air switch K2-1 ~ K2-3 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 grounding system fault, after answering cable to have a power failure, grounding system is overhauled.The present invention be directed to the high-tension cable under the directly grounded mode of operation in protection one end, one end.
If defectiveness in cable protection grounding box BHJD, needs hotline maintenance, before maintenance cable protection grounding box BHJD, the air switch K1-1 of the first adapter U1 of the present invention ~ K1-3 is disconnected, be protected mode; Before the direct grounding box ZJJD of maintenance cable, the air switch K2-1 of the second adapter U2 of the present invention ~ K2-3 is closed, be direct ground connection pattern; Earth connection of the present invention is connected with the earth.
When carrying out the direct grounding box ZJJD maintenance of cable; the total ground connection of the direct grounding box ZJJD of cable can be disconnected; now the second adapter U2 of the direct grounding box ZJJD of cable section is still in direct ground connection pattern; advantage one; can protect staff's safety work; advantage two, whole cable grounding system does not change cable grounding mode.
When carrying out cable protection grounding box BHJD maintenance, first carry out cable grounding Mode change: air switch K1-1 ~ K1-3 of the first adapter U1 can be disconnected closed, be direct ground connection pattern, the air switch K2-1 of the second adapter U2 ~ K2-3 disconnected simultaneously, be protected mode; At this moment need the cable protection grounding box BHJD of maintenance to be isolated out, it reaches 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. a high-tension cable protective earthing system switching device, is characterized in that: comprise the first adapter U1 and the second adapter U2;
Described the first adapter U1 comprises protector R1-1 ~ R1-3, ammeter A1-1 ~ A1-3, voltmeter V1-1 ~ V1-3 and air switch K1-1 ~ K1-3; Described the second adapter U2 comprises protector R2-1 ~ R2-3, ammeter A2-1 ~ A2-3, voltmeter V2-1 ~ V2-3 and air switch K2-1 ~ K2-3;
Described protector R1-1 is connected on after connecting with ammeter A1-1 between the A phase metallic sheath and ground of cable protection grounding box side; Described voltmeter V1-1 is in parallel with the series circuit of ammeter A1-1 with described protector R1-1; Described air switch K1-1 is in parallel with described protector R1-1;
Described protector R1-2 is connected on after connecting with ammeter A1-2 between the B phase metallic sheath and ground of cable protection grounding box side; Described voltmeter V1-2 is in parallel with the series circuit of ammeter A1-2 with described protector R1-2; Described air switch K1-2 is in parallel with described protector R1-2;
Described protector R1-3 is connected on after connecting with ammeter A1-3 between the C phase metallic sheath and ground of cable protection grounding box side; Described voltmeter V1-3 is in parallel with the series circuit of ammeter A1-3 with described protector R1-3; Described air switch K1-3 is in parallel with described protector R1-3;
Described protector R2-1 is connected on after connecting with ammeter A2-1 between the A phase metallic sheath and ground of the direct grounding box side of cable; Described voltmeter V2-1 is in parallel with the series circuit of ammeter A2-1 with described protector R2-1; Described air switch K2-1 is in parallel with described protector R2-1;
Described protector R2-2 is connected on after connecting with ammeter A2-2 between the B phase metallic sheath and ground of the direct grounding box side of cable; Described voltmeter V2-2 is in parallel with the series circuit of ammeter A2-2 with described protector R2-2; Described air switch K2-2 is in parallel with described protector R2-2;
Described protector R2-3 is connected on after connecting with ammeter A2-3 between the C phase metallic sheath and ground of the direct grounding box side of cable; Described voltmeter V2-3 is in parallel with the series circuit of ammeter A2-3 with described protector R2-3; Described air switch K2-3 is in parallel with described protector R2-3.
2. a kind of high-tension cable protective earthing system switching device according to claim 1, is characterized in that: the model of described protector R1-1 ~ R1-3 and protector R2-1 ~ R2-3 is BHQ-10/400; The model of described ammeter A1-1 ~ A1-3 and ammeter A2-1 ~ A2-3 is AOB194Z-8 * 4-3U; The model of described voltmeter V1-1 ~ V1-3 and voltmeter V2-1 ~ V2-3 is AOB194Z-8 * 4-3U; The model of described air switch K1-1 ~ K1-3 and air switch K2-1 ~ K2-3 is DZ20L-250/4300.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410271847.3A CN104113004B (en) | 2014-06-18 | 2014-06-18 | A kind of high tension cable protective grounding system switching device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410271847.3A CN104113004B (en) | 2014-06-18 | 2014-06-18 | A kind of high tension cable protective grounding system switching device |
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| CN104113004A true CN104113004A (en) | 2014-10-22 |
| CN104113004B CN104113004B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410271847.3A Active CN104113004B (en) | 2014-06-18 | 2014-06-18 | A kind of high tension cable protective grounding system switching device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374241A (en) * | 2016-08-29 | 2017-02-01 | 宁波东方电缆股份有限公司 | Grounding structure with land cable with built-in armored temperature measurement optical cable |
| 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 |
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| DE19512018C1 (en) * | 1995-03-31 | 1996-04-11 | Felten & Guilleaume Energie | Magnetic field compensation circuit for HV cable |
| CN201229389Y (en) * | 2008-07-24 | 2009-04-29 | 福建省泉州电业局 | Cable sheath insulation on-line monitoring device |
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| CN103323751A (en) * | 2013-05-31 | 2013-09-25 | 国家电网公司 | High-voltage short-cable insulation terminal partial discharge testing device and using method |
| 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 |
| CN203895835U (en) * | 2014-06-18 | 2014-10-22 | 国家电网公司 | Switching device of high-voltage cable protective system |
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2014
- 2014-06-18 CN CN201410271847.3A patent/CN104113004B/en active Active
Patent Citations (7)
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| DE19512018C1 (en) * | 1995-03-31 | 1996-04-11 | Felten & Guilleaume Energie | Magnetic field compensation circuit for HV cable |
| CN201229389Y (en) * | 2008-07-24 | 2009-04-29 | 福建省泉州电业局 | Cable sheath insulation on-line monitoring device |
| CN101645548A (en) * | 2009-08-25 | 2010-02-10 | 山东电力集团公司淄博供电公司 | Method for grounding single-core high-voltage cable metal sheath |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374241A (en) * | 2016-08-29 | 2017-02-01 | 宁波东方电缆股份有限公司 | Grounding structure with land cable with built-in armored temperature measurement optical cable |
| 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 |
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| CN104113004B (en) | 2016-08-24 |
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