CN203895836U - Switching device of cross-connected high-voltage cable grounding system - Google Patents

Switching device of cross-connected high-voltage cable grounding system Download PDF

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Publication number
CN203895836U
CN203895836U CN201420324971.7U CN201420324971U CN203895836U CN 203895836 U CN203895836 U CN 203895836U CN 201420324971 U CN201420324971 U CN 201420324971U CN 203895836 U CN203895836 U CN 203895836U
Authority
CN
China
Prior art keywords
air switch
switching device
cable
binding post
model
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn - After Issue
Application number
CN201420324971.7U
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Chinese (zh)
Inventor
李宏峰
杨博超
王立军
成洪刚
胡建彬
张霞
郭康
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
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
Original Assignee
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 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 filed Critical State Grid Corp of China SGCC
Priority to CN201420324971.7U priority Critical patent/CN203895836U/en
Application granted granted Critical
Publication of CN203895836U publication Critical patent/CN203895836U/en
Withdrawn - After Issue legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a switching device of a cross-connected high-voltage cable grounding system. The switching device comprises protectors R1-R3, ammeters A1-A3, voltmeters V1-V3, air switches K1-K6 and binding posts P11-P32. The switching device has the advantages that switching between a cross connection model and a direct grounding mode can be safely carried out via the air switches; an original cable grounding box can be replaced or maintained when the cables are live, the grounding box with defects is isolated, safe work of the maintaining staff can be ensured, and the cable grounding system can be maintained lively; the ammeters and voltmeters are integrated in the switching device, the cable can be detected in a live state after grounding leads of the cables are connected, the ammeters and voltmeters are used for displaying data during maintenance, and the present load state can be visually analyzed; and the switching device is small in size and portable.

Description

The cross interconnected grounding system switching device of a kind of high-tension cable
Technical field
The utility model belongs to cable grounding system overhaul technical field, relates 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 gets rid of unnecessary induced current by grounding system.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.
Utility model content
Technical problem to be solved in the utility model 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 beneficial effects of the utility model are: 1, the built-in protector of the utility model and ground structure according to maintenance needs, can carry out safe conversion (a case is multiplex) by air 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 utility model can do temporary earthing device, by being connected with cable grounding line, defect grounding box is isolated, ensure maintainer's safety work, realized the new breakthrough of hotline maintenance cable grounding system; 3, inner integrated ammeter and voltmeter of the utility model, can carry out banded cable electro-detection after being connected with cable grounding lead-in wire, and maintenance time by the data demonstration of ammeter and voltmeter, can the current load condition of intuitive analysis; 4, the utility model volume is little, easy to carry.
Brief description of the drawings
Fig. 1 is circuit theory diagrams of the present utility model.
The principle schematic of Fig. 2 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 utility model 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 gets rid of unnecessary induced current by grounding system.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 utility model is for 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 utility model ~ K3 is disconnected, by air switch K4 ~ K6 closure, be cross interconnected pattern; Secondly earth connection of the present utility model 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 utility model, not in order to limit the utility model, all any amendments of making within spirit of the present utility model and principle, be equal to and replace and improvement etc., within being all included in protection range of the present utility model.

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.
CN201420324971.7U 2014-06-18 2014-06-18 Switching device of cross-connected high-voltage cable grounding system Withdrawn - After Issue CN203895836U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420324971.7U CN203895836U (en) 2014-06-18 2014-06-18 Switching device of cross-connected high-voltage cable grounding system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420324971.7U CN203895836U (en) 2014-06-18 2014-06-18 Switching device of cross-connected high-voltage cable grounding system

Publications (1)

Publication Number Publication Date
CN203895836U true CN203895836U (en) 2014-10-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420324971.7U Withdrawn - After Issue CN203895836U (en) 2014-06-18 2014-06-18 Switching device of cross-connected high-voltage cable grounding system

Country Status (1)

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CN (1) CN203895836U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104113002A (en) * 2014-06-18 2014-10-22 国家电网公司 High-voltage cable cross interconnection grounding system transfer device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104113002A (en) * 2014-06-18 2014-10-22 国家电网公司 High-voltage cable cross interconnection grounding system transfer device
CN104113002B (en) * 2014-06-18 2017-04-05 国家电网公司 A kind of high tension cable cross connection grounding system switching device

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C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20141022

Effective date of abandoning: 20170405

AV01 Patent right actively abandoned