CN104113004B - A kind of high tension cable protective grounding system switching device - Google Patents
A kind of high tension cable protective grounding system switching device Download PDFInfo
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- CN104113004B CN104113004B CN201410271847.3A CN201410271847A CN104113004B CN 104113004 B CN104113004 B CN 104113004B CN 201410271847 A CN201410271847 A CN 201410271847A CN 104113004 B CN104113004 B CN 104113004B
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- 230000001681 protective effect Effects 0.000 title claims abstract description 28
- 230000001012 protector Effects 0.000 claims abstract description 68
- 239000002184 metal Substances 0.000 claims description 20
- 238000012423 maintenance Methods 0.000 abstract description 15
- 230000007547 defect Effects 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000009825 accumulation Methods 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Abstract
The invention discloses a kind of high tension cable protective grounding system switching device, including the first adapter U1 and the second adapter U2；It provides the benefit that: built-in protector and ground structure, according to maintenance needs, can carry out safe conversion (a case multiplex) in protected mode with being directly grounded in pattern by air switch；Can change or overhaul former earthing box for electric cable in the case of cable is charged, do temporary earthing device, by being connected with cable grounding line, defect grounding box be isolated, it is ensured that the safety work of maintainer, it is achieved that the new breakthrough of hotline maintenance cable grounding system；Be internally integrated ammeter and voltmeter, after being connected with cable grounding lead-in wire, banded cable electro-detection can have been carried out, and maintenance time pass through the data of ammeter and voltmeter and show, can intuitively analyze current load condition；Volume of the present invention is little, easy to carry.
Description
Technical field
The invention belongs to cable grounding system overhaul technical field, relate to a kind of high tension cable protective grounding system switching device.
Background technology
The major function of high tension cable protective grounding system is the induced voltage reducing and running the accumulation of cable metal protective layer, gets rid of unnecessary faradic current by earthed system.Single-core high-voltage cable many employings single-point grounding pattern, one end ground connection one end protected mode and cross interconnected pattern at present.If run into grounding system fault, after answering cable to have a power failure, earthed system is overhauled.
More earthing box for electric cable is applied and is used on 35kV and above cable grounding system, and due to earthing box for electric cable sealing difference relatively, construction link is not tight control, and nearlyer earthing box for electric cable Frequent Troubles cause electrical network to be forced interruption maintenance.Interruption maintenance, can cause electrical network single line to have a power failure every time, user causes great economic loss, and causes discharge pressure to adjacent electrical network.Increase with the staff matched that has a power failure simultaneously, including operations staff have a power failure grid switching operation, maintainer's defect elimination, dispatcher orders, circuit personnel protect electricity etc., add the loss of workload and manpower and materials.
Summary of the invention
The technical problem to be solved be to provide a kind of can in the case of cable is charged to cable protection grounding box, be directly grounded case carry out maintenance change operation high tension cable protective grounding system switching device.
A kind of high tension cable protective grounding system switching device is the technical scheme is that, including the first adapter U1 and the second adapter U2 by solving above-mentioned technical problem；
Described first adapter U1 includes protector R1-1 ~ R1-3, ammeter A1-1 ~ A1-3, voltmeter V1-1 ~ V1-3 and air switch K1-1 ~ K1-3；Described second adapter U2 includes 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 and ammeter A1-1 connects and is followed by between A phase protective metal shell and the 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 and ammeter A1-2 connects and is followed by between B phase protective metal shell and the 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 and ammeter A1-3 connects and is followed by between C phase protective metal shell and the 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 and ammeter A2-1 connects and is followed by being directly grounded between A phase protective metal shell and the ground of case side at 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 and ammeter A2-2 connects and is followed by being directly grounded between B phase protective metal shell and the ground of case side at 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 and ammeter A2-3 connects and is followed by being directly grounded between C phase protective metal shell and the ground of case side at 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, safe conversion (a case multiplex) can be carried out in protected mode with being directly grounded in pattern by air switch；2, can change or overhaul former earthing box for electric cable in the case of cable is charged, the present invention can do temporary earthing device, by being connected with cable grounding line, is isolated by defect grounding box, ensure the safety work of maintainer, it is achieved that the new breakthrough of hotline maintenance cable grounding system；3, the present invention has been internally integrated ammeter and voltmeter, can carry out banded cable electro-detection after being connected with cable grounding lead-in wire, and maintenance time pass through the data of ammeter and voltmeter and show, can intuitively analyze current load condition；4, volume of the present invention is little, easy to carry.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the present invention.
In FIG, BHJD is cable protection grounding box；ZJJD is that cable is directly grounded case.
Detailed description of the invention
Embodiment as shown in Figure 1 understands, and it includes the first adapter U1 and the second adapter U2；
Described first adapter U1 includes protector R1-1 ~ R1-3, ammeter A1-1 ~ A1-3, voltmeter V1-1 ~ V1-3 and air switch K1-1 ~ K1-3；Described second adapter U2 includes 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 and ammeter A1-1 connects and is followed by between A phase protective metal shell and the 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 and ammeter A1-2 connects and is followed by between B phase protective metal shell and the 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 and ammeter A1-3 connects and is followed by between C phase protective metal shell and the 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 and ammeter A2-1 connects and is followed by being directly grounded between A phase protective metal shell and the ground of case side at 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 and ammeter A2-2 connects and is followed by being directly grounded between B phase protective metal shell and the ground of case side at 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 and ammeter A2-3 connects and is followed by being directly grounded between C phase protective metal shell and the ground of case side at 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 work process of the present invention is as follows: the major function of high tension cable protective grounding system is the induced voltage reducing and running the accumulation of cable metal protective layer, gets rid of unnecessary faradic current by earthed system.Single-core high-voltage cable many employings single-point grounding pattern, one end ground connection one end protected mode and cross interconnected pattern at present.If run into grounding system fault, after answering cable to have a power failure, earthed 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 defective in cable protection grounding box BHJD, need 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 so that it is for protected mode；Before maintenance cable is directly grounded case ZJJD, by the air switch K2-1 of the second adapter U2 of the present invention ~ K2-3 Guan Bi so that it is for being directly grounded pattern；The earth lead of the present invention is connected with the earth.
When carrying out cable and being directly grounded case ZJJD maintenance; cable can be directly grounded the total ground connection of case ZJJD disconnect; now cable is directly grounded the second adapter U2 of case ZJJD section and is still being directly grounded in pattern; advantage one; worker safety's operation can be protected; advantage two, whole cable grounding system does not changes cable grounding mode.
When carrying out cable protection grounding box BHJD maintenance; first cable grounding Mode change is carried out: the air switch K1-1 ~ K1-3 of the first adapter U1 can be disconnected Guan Bi; it is the pattern of being directly grounded, the air switch K2-1 of the second adapter U2 ~ K2-3 is disconnected so that it is for protected mode simultaneously；At this moment the cable protection grounding box BHJD needing maintenance is isolated out, and it reaches the condition of safety inspection.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent and improvement etc. made within the spirit and principles in the present invention, within being all contained in protection scope of the present invention.
Claims (2)
1. a high tension cable protective grounding system switching device, it is characterised in that: include the first adapter U1 and the second adapter U2；
Described first adapter U1 includes protector R1-1 ~ R1-3, ammeter A1-1 ~ A1-3, voltmeter V1-1 ~ V1-3 and air switch K1-1 ~ K1-3；Described second adapter U2 includes 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 and ammeter A1-1 connects and is followed by between A phase protective metal shell and the 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 and ammeter A1-2 connects and is followed by between B phase protective metal shell and the 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 and ammeter A1-3 connects and is followed by between C phase protective metal shell and the 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 and ammeter A2-1 connects and is followed by being directly grounded between A phase protective metal shell and the ground of case side at 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 and ammeter A2-2 connects and is followed by being directly grounded between B phase protective metal shell and the ground of case side at 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 and ammeter A2-3 connects and is followed by being directly grounded between C phase protective metal shell and the ground of case side at 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.
A kind of high tension cable protective grounding system switching device the most according to claim 1, it is characterised 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 CN104113004A (en) | 2014-10-22 |
| CN104113004B true CN104113004B (en) | 2016-08-24 |
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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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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 |
| 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 |
| 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 |
-
2014
- 2014-06-18 CN CN201410271847.3A patent/CN104113004B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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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