CN104113002B - A kind of high tension cable cross connection grounding system switching device - Google Patents

A kind of high tension cable cross connection grounding system switching device Download PDF

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Publication number
CN104113002B
CN104113002B CN201410271783.7A CN201410271783A CN104113002B CN 104113002 B CN104113002 B CN 104113002B CN 201410271783 A CN201410271783 A CN 201410271783A CN 104113002 B CN104113002 B CN 104113002B
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China
Prior art keywords
cable
air switch
binding post
voltmeter
ammeter
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CN201410271783.7A
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Chinese (zh)
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CN104113002A (en
Inventor
李宏峰
杨博超
王立军
成洪刚
胡建彬
张霞
郭康
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State Grid Corp of China SGCC
State Grid Hebei Electric Power Co Ltd
Shijiazhuang Power Supply Co of State Grid Hebei Electric Power Co Ltd
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State Grid Corp of China SGCC
State Grid Hebei Electric Power Co Ltd
Shijiazhuang Power Supply Co of State Grid Hebei Electric Power Co Ltd
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Publication of CN104113002A publication Critical patent/CN104113002A/en
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Abstract

The invention discloses a kind of high tension cable cross connection grounding system switching device, including protector R1 ~ R3, ammeter A1 ~ A3, voltmeter V1 ~ V3, air switch K1 ~ K6 and binding post P11 ~ P32;Its advantage is:Can be by air switch is in cross interconnected pattern and is directly grounded between pattern and carries out safe conversion;Former earthing box for electric cable can be changed or is overhauled in the case where cable is powered, defect grounding box is isolated, it is ensured that the safety work of maintainer, realized the new breakthrough of hotline maintenance cable grounding system;The present invention has been internally integrated ammeter and voltmeter, can carry out cable live detection after being connected with cable grounding lead, and maintenance when by ammeter and the data display of voltmeter, can intuitively analyze current load condition;Small volume of the present invention, it is easy to carry.

Description

A kind of high tension cable cross connection grounding system switching device
Technical field
The invention belongs to cable grounding system overhaul technical field, is related to a kind of high tension cable cross connection grounding system and turns Connection device.
Background technology
The major function of high tension cable protective grounding system is the induced voltage for reducing the protective layer accumulation of operation cable metal, Unnecessary faradic current is excluded by earthed system.At present using single-point grounding pattern, one end ground connection one more than single-core high-voltage cable End protected mode and cross interconnected pattern.If run into grounding system fault, after answering cable to have a power failure, earthed system is examined Repair.
Applying earthing box for electric cable more on 35kV and above cable grounding system use, due to earthing box for electric cable sealing it is poor Compared with construction link control is not tight, nearlyer earthing box for electric cable Frequent Troubles, causes electrical network to be forced interruption maintenance.Each interruption maintenance, Electrical network single line can be caused to have a power failure, great economic loss is caused to user, and discharge pressure is caused to adjacent electrical network.While with The staff that power failure is engaged increases, including under operations staff's power failure grid switching operation, maintainer's defect elimination, dispatcher Make, circuit personnel protect electricity etc., increased the loss of workload and manpower and materials.
The content of the invention
The technical problem to be solved is to provide one kind and cable protection can be connect in the case where cable is powered Ground case, be directly grounded case carry out overhaul replacement operation high tension cable cross connection grounding system switching device.
By solving the technical scheme that adopts of above-mentioned technical problem it is:A kind of high tension cable cross connection grounding system switching Device, including protector R1 ~ R3, ammeter A1 ~ A3, voltmeter V1 ~ V3, air switch K1 ~ K6 and binding post P11 ~ P32;
The voltmeter V1 is connected between the binding post P11 and ground;Binding post P11 electric currents described in Jing successively Table A 1, air switch K4 meet the binding post P12;The protector R1 is in parallel with air switch K1 to be followed by the ammeter Between A1 and the node and ground of air switch K4;
The voltmeter V2 is connected between the binding post P21 and ground;Binding post P21 electric currents described in Jing successively Table A 2, air switch K5 meet the binding post P22;The protector R2 is in parallel with air switch K2 to be followed by the ammeter Between A2 and the node and ground of air switch K5;
The voltmeter V3 is connected between the binding post P31 and ground;Binding post P31 electric currents described in Jing successively Table A 3, air switch K6 meet the binding post P32;The protector R3 is in parallel with air switch K3 to be followed by the ammeter Between A3 and the node and ground of air switch K6.
The model of the protector R1 ~ R3 is BHQ-10/400;The model of the ammeter A1 ~ A3 is AOB194Z- 8×4-3U;The model of the voltmeter V1 ~ V3 is AOB194Z-8 × 4-3U;The model of the air switch K1 ~ K3 is DZ20L-250/4300。
The invention has the beneficial effects as follows:1st, built-in protector of the invention and ground structure, according to maintenance needs, can pass through Switch isolation switch is in cross interconnected pattern and is directly grounded between pattern and carries out safe conversion(One case multiplex);2nd, can be in banded cable Former earthing box for electric cable is changed or is overhauled in the case of electricity, and the present invention can do temporary earthing device, by being connected with cable grounding line, Defect grounding box is isolated, it is ensured that the safety work of maintainer, realize the new breakthrough of hotline maintenance cable grounding system; 3rd, the present invention has been internally integrated ammeter and voltmeter, and cable live detection can be carried out after being connected with cable grounding lead, and And maintenance when by ammeter and the data display of voltmeter, can intuitively analyze current load condition;4th, the present invention Small volume, it is easy to carry.
Description of the drawings
Fig. 1 is the circuit theory diagrams of the present invention.
Fig. 2 for carry out under the cross interconnected protected mode of cable hotline maintenance and monitoring principle schematic.
In fig. 2, AJT --- A phase cable insulated joints;BJT --- B phase cable insulated joints;CJT --- C phase cables Insulating joint;A --- A phase cables;B --- B phase cables;C --- C phase cables;JCHL --- cross interconnected case;A-1、A-2、B- 1st, B-2, C-1, C-2 are respectively the terminals of cross connection grounding case.
Specific embodiment
Embodiment as shown in Figure 1 understands that it includes protector R1 ~ R3, ammeter A1 ~ A3, voltmeter V1 ~ V3, air Switch K1 ~ K6 and binding post P11 ~ P32;
The voltmeter V1 is connected between the binding post P11 and ground;Binding post P11 electric currents described in Jing successively Table A 1, air switch K4 meet the binding post P12;The protector R1 is in parallel with air switch K1 to be followed by the ammeter Between A1 and the node and ground of air switch K4;
The voltmeter V2 is connected between the binding post P21 and ground;Binding post P21 electric currents described in Jing successively Table A 2, air switch K5 meet the binding post P22;The protector R2 is in parallel with air switch K2 to be followed by the ammeter Between A2 and the node and ground of air switch K5;
The voltmeter V3 is connected between the binding post P31 and ground;Binding post P31 electric currents described in Jing successively Table A 3, air switch K6 meet the binding post P32;The protector R3 is in parallel with air switch K3 to be followed by the ammeter Between A3 and the node and ground of air switch K6.
The model of the protector R1 ~ R3 is BHQ-10/400;The model of the ammeter A1 ~ A3 is AOB194Z- 8×4-3U;The model of the voltmeter V1 ~ V3 is AOB194Z-8 × 4-3U;The model of the 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 grounding system is to reduce operation cable metal The induced voltage of protective layer accumulation, excludes unnecessary faradic current by earthed system.At present using single more than single-core high-voltage cable Point ground connection pattern, one end are grounded one end protected mode and cross interconnected pattern.If running into the event of high tension cable protective grounding system During barrier, after answering cable to have a power failure, high tension cable protective grounding system is overhauled.The present invention be directed to the cross interconnected protection of cable High tension cable under pattern.
As shown in Fig. 2 the A-1 of cross connection grounding case is connect on the protective metal shell lead-out wire of A phase cable insulated joint left ends, The A-2 of cross connection grounding case is connect on the protective metal shell lead-out wire of A phase cable insulated joint right-hand members;The B- of cross connection grounding case On the 1 protective metal shell lead-out wire for connecing B phase cable insulated joint left ends, the B-2 of cross connection grounding case connects B phase cable insulated joints On the protective metal shell lead-out wire of right-hand member;The C-1 of cross connection grounding case connects the protective metal shell of C phase cable insulated joint left ends and draws On line, the C-2 of cross connection grounding case is connect on the protective metal shell lead-out wire of C phase cable insulated joint right-hand members.
If defective in cross connection grounding case, hotline maintenance is needed.Before maintenance cross connection grounding case, first will The air switch K1 of the present invention ~ K3 disconnects, by air switch K4 ~ K6 closures so as to for cross interconnected pattern;Secondly by the present invention Earth lead with the earth be connected;Then binding post P11 is connected to the protective metal shell lead-out wire of A phase cable insulated joint left ends On, P22 is connected on the protective metal shell lead-out wire of A phase cable insulated joint right-hand members;Binding post P21 is connected to into B phases electric On the protective metal shell lead-out wire of cable insulating joint left end, the protective metal shell that P32 is connected to B phase cable insulated joint right-hand members is drawn On line;Binding post P31 is connected on the protective metal shell lead-out wire of C phase cable insulated joint left ends, P12 is connected to into C phases On the protective metal shell lead-out wire of cable insulated joint right-hand member(See Fig. 2).
After connecting, defective cross connection grounding case can be disconnected by staff with cable, at this moment need what is overhauled Cross connection grounding case is isolated out so as to reach the condition of safety inspection.
The foregoing is only presently preferred embodiments of the present invention, not to limit the present invention, all spirit in the present invention and Any modification, equivalent and improvement for being made within principle etc., are all contained within protection scope of the present invention.

Claims (2)

1. a kind of high tension cable cross connection grounding system switching device, it is characterised in that:Including protector R1 ~ R3, ammeter A1 ~ A3, voltmeter V1 ~ V3, air switch K1 ~ K6 and binding post P11 ~ P32;
The voltmeter V1 is connected between the binding post P11 and ground;Binding post P11 ammeters described in Jing successively A1, air switch K4 meet the binding post P12;The protector R1 is in parallel with air switch K1 to be followed by the ammeter A1 And the node and ground of air switch K4 between;
The voltmeter V2 is connected between the binding post P21 and ground;Binding post P21 ammeters described in Jing successively A2, air switch K5 meet the binding post P22;The protector R2 is in parallel with air switch K2 to be followed by the ammeter A2 And the node and ground of air switch K5 between;
The voltmeter V3 is connected between the binding post P31 and ground;Binding post P31 ammeters described in Jing successively A3, air switch K6 meet the binding post P32;The protector R3 is in parallel with air switch K3 to be followed by the ammeter A3 And the node and ground of air switch K6 between.
2. a kind of high tension cable cross connection grounding system switching device according to claim 1, it is characterised in that:It is described The model of protector R1 ~ R3 is BHQ-10/400;The model of the ammeter A1 ~ A3 is AOB194Z-8 × 4-3U;It is described The model of voltmeter V1 ~ V3 is AOB194Z-8 × 4-3U;The model of the air switch K1 ~ K3 is DZ20L-250/ 4300。
CN201410271783.7A 2014-06-18 2014-06-18 A kind of high tension cable cross connection grounding system switching device Active CN104113002B (en)

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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
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CN104113002B true CN104113002B (en) 2017-04-05

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106093527B (en) * 2016-07-13 2019-02-05 许继集团有限公司 The mutual header of intelligent crossover, intelligent interconnection earthed system and earth current monitoring method
CN109412146B (en) * 2018-10-17 2022-06-07 国网上海市电力公司 Power cable cross-connection online correction device and method
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

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

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