CN203398357U - Grounding device for 10kV cable branch box, ring main unit and ring main box - Google Patents

Grounding device for 10kV cable branch box, ring main unit and ring main box Download PDF

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Publication number
CN203398357U
CN203398357U CN201320244364.5U CN201320244364U CN203398357U CN 203398357 U CN203398357 U CN 203398357U CN 201320244364 U CN201320244364 U CN 201320244364U CN 203398357 U CN203398357 U CN 203398357U
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China
Prior art keywords
grounding
ring main
wire clamp
earth
main unit
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Active
Application number
CN201320244364.5U
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Chinese (zh)
Inventor
杨海峰
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State Grid Corp of China SGCC
Shanghai Municipal Electric Power Co
Original Assignee
State Grid Corp of China SGCC
Shanghai Municipal Electric Power Co
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Priority to CN201320244364.5U priority Critical patent/CN203398357U/en
Application granted granted Critical
Publication of CN203398357U publication Critical patent/CN203398357U/en
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Abstract

The utility model discloses a grounding device for a 10kV cable branch box, a ring main unit and a ring main box. The grounding device comprises an insulating operating rod, a conductor grip, a grounding wire and a grounding clip, wherein the insulating operating rod is connected with the conductor grip in a split mode, the conductor grip comprises a conductor grip body, a threaded connecting copper bush, a grounding terminal and an insulating operating rod connecting element. The threaded connecting copper bush is arranged at a first end of the conductor grip body; the grounding terminal is arranged in the middle of the conductor grip body in a sleeved mode, and is connected with the grounding wire; nuts are arranged on the conductor grip body and two sides of the grounding terminal in a sleeved mode; and the insulating operating rod connecting element is arranged at a second end of the conductor grip body. The grounding device can be in good connection with conductive parts in power transformation cable bins of the 10kv cable branch box, the ring main unit, and the ring main box, grounding is safe and reliable, the fact that the grounding wire is hung in branch boxes is achieved, the requirements, regulated in rules, of the grounding wire and hanging connection can be met, the operation is convenient, the labor intensity of constructors are really reduced, and the construction safety is effectively guaranteed.

Description

Earthing device for 10kV cable branch box, ring main unit, looped network case
Technical field
The utility model relates to a kind of earth connection, and specifically, the utility model relates to a kind of change earth connection for 10kV cable branch box, ring main unit, looped network case.
Background technology
Existing earth connection is all that overhead transmission line or row use, for horizontal stroke articulates mutually, cannot use in cable branch box, ring main unit, looped network case become, can only be in the overhead transmission line away from job site or transformer station hanging earthing conductor, to the construction particularly secure context of making troubles, bring many uncertain factors.According to electric power safety operational procedure earth wire and articulate and should meet the following requirements:
One, earth connection application is comprised of the multiply annealed copper wire of transparent sheath;
Er, cross section must not be less than 25MM square;
Three, earth connection application wire clamp is fixed on conductor, should contact good connection reliable, and three-phase shortcircuit;
Four, mounting or dismounting earth connection all should be used insulating rod, and length is not less than 0.7M;
Five, temporary grounding body section is not less than 190MM square (diameter 16MM).Insert the underground degree of depth and must not be less than 0.6M;
Six, to seeing the equipment end of contiguous earth connection, must not install working earthing line additional.
For this reason, according to practice of construction situation, cannot hanging earthing conductor in the 10KV cable branch box of working site, contiguous earth connection is away from job site Huo transformer station, can not meet above-mentioned the 6th, and need the many uncertain factors of secure context that ascend operation brings, should cause enough attention.Weak point main manifestations is:
1) increase operating crew's labour intensity, reduced operating efficiency.
2) increased the operating time, having reduced can power consumption rate.
3) need ascend operation, reduced coefficient of safety.
4) do not see contiguous earth connection, to construction safety, bring hidden danger.
Utility model content
The purpose of this utility model is to provide a kind of change earthing device for 10kV cable branch box, ring main unit, looped network case, can in storehouse, form good connection with current-carrying part at 10kV cable branch box, ring main unit, looped network case power transformation cable, safe and reliable ground connection, solve the problem of hanging earthing conductor in feeder pillar, and can meet the earth wire of rules defined and the requirement articulating.
For achieving the above object, the utility model provides a kind of earthing device for 10kV cable branch box, ring main unit, looped network case, and it comprises: insulating bar, wire clamp, earth connection and earth clip, wherein, insulating bar adopts split type connection with wire clamp, and this wire clamp comprises:
Wire clamp body,
Be arranged on the copper sheathing that is threaded of wire clamp body first end;
Be nested with the earth terminal at wire clamp body middle part, this earth terminal adopts sliding ring type to be connected with wire clamp body, on wire clamp body, the both sides of earth terminal are all arranged with nut, this earth terminal connection earth connection; And
Be arranged on the insulating bar Connection Element of wire clamp body the second end.
The above-mentioned earthing device for 10kV cable branch box, ring main unit, looped network case wherein, is provided with packing ring between nut and earth terminal.
The above-mentioned earthing device for 10kV cable branch box, ring main unit, looped network case, wherein, the instrument that when two ends of described insulating bar are all fixed above for hanging wire, axial screw connects (copper sheathing that is threaded is connected with the axial screw of cable termination), clamp nut (nut on earth terminal both sides, with dead earth terminal) and removes cable terminal insulation sealing cap.
Analysis result by 10kV cable branch box, ring main unit, looped network case being become to internal structure into, must change the mode of ground wire hitching, and make following regulation and require:
1) by the original mode that laterally articulates, change the mode that axially articulates into.
2) hanging earthing conductor must connect reliably, and contact is good.
3), while articulating, insulating bar and earth connection are not wound around.
4), in articulating, human body must not contact earth connection.
So must solve by improving the mode of the wire clamp of original earth connection the problem with grounding of 10KV cable branch box.
First, being connected by laterally articulating of former earth connection and conductor is improved to axial screw and connects, can go deep into cable terminal insulation sheath inner, the copper sheathing that makes to be threaded is connected with cable termination fastening bolt, and copper sheathing size can be made into different size according to fastening bolt.Solution articulates problem.For solving the winding problem of insulating bar and earth connection, adopt insulating bar and the mode that articulates wire clamp (being wire clamp) split, wire clamp is designed to sliding ring type with earth connection and is connected, rear end adds fastening nuts, the two ends of insulating bar are fixing upper for articulating operation (axial screw connection) and fastening rear end nut, and can remove the instrument of the insulation sealing cap of cable termination, meet the requirement of above regulation.
In a word, the earthing device that the utility model provides can form good connection with current-carrying part in storehouse at 10kV cable branch box, ring main unit, looped network case power transformation cable, the safe and reliable ground connection of energy, solved the problem of hanging earthing conductor in feeder pillar, and can meet the earth wire of rules defined and the requirement articulating, and easy to operate, really reduced workmen's labour intensity, for construction safety provides effective assurance.
Accompanying drawing explanation
Fig. 1 is the structural representation of the wire clamp of a kind of earthing device for 10kV cable branch box, ring main unit, looped network case of the present utility model.
Fig. 2 a, 2b are the scheme of installation of the wire clamp of a kind of earthing device for 10kV cable branch box, ring main unit, looped network case of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, describe the technical solution of the utility model in detail.
The structure that is used for the earthing device of 10kV cable branch box, ring main unit, looped network case comprises: insulating bar, wire clamp, earth connection, earth terminal and earth clip.
The structural representation of the wire clamp of the earthing device for 10kV cable branch box, ring main unit, looped network case providing for the utility model as shown in Figure 1.This wire clamp comprises:
Wire clamp body 11,
Be arranged on the copper sheathing 12 that is threaded of wire clamp body first end;
Be nested with the earth terminal 13 at wire clamp body middle part, this earth terminal 13 adopts sliding ring types to be connected with wire clamp body 11, on wire clamp body 11, earth terminal 13 both sides are all arranged with nut 14, these earth terminal 13 connection earth connections; More preferably, between nut 14 and earth terminal 13, be provided with packing ring 16; And
Be arranged on the insulating bar jockey 15 of wire clamp body the second end, insulating bar adopts split type connection with wire clamp, to avoid the winding risk of insulating bar and earth connection.
Preferably, the two ends of described insulating bar all fixing upper during for hanging wire axial screw connect the instrument (this instrument is common tool) of (copper sheathing that is threaded is connected with the axial screw of cable termination), clamp nut (nut on earth terminal both sides, take dead earth terminal) and dismounting cable terminal insulation sealing cap.
As shown in Fig. 2 a, 2b, for wire clamp 10(of the present utility model as shown in Figure 2 a) with cable termination 20(as shown in Figure 2 b) scheme of installation, by the instrument of insulating bar end, the copper sheathing that is threaded of wire clamp is connected with cable termination axial-rotation.
In sum, earth connection after improvement can form good connection with current-carrying part in storehouse at 10kV cable branch box, ring main unit, looped network case power transformation cable, thereby reach reliable ground object, solved this problem of hanging earthing conductor in feeder pillar, and can meet the earth wire of rules defined and the requirement articulating, and easy to operate, really reduced workmen's labour intensity, for construction safety provides effective assurance.
Although content of the present utility model has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to restriction of the present utility model.Those skilled in the art, read after foregoing, for multiple modification of the present utility model with to substitute will be all apparent.Therefore, protection range of the present utility model should be limited to the appended claims.

Claims (3)

1. for an earthing device for 10kV cable branch box, ring main unit, looped network case, it comprises: insulating bar, wire clamp, earth connection and earth clip, it is characterized in that, and insulating bar adopts split type connection with wire clamp, and this wire clamp comprises:
Wire clamp body (11),
Be arranged on the copper sheathing that is threaded (12) of wire clamp body first end;
Be nested with the earth terminal (13) at wire clamp body middle part, this earth terminal (13) adopts sliding ring type to be connected with wire clamp body (11), both sides upper at wire clamp body (11), earth terminal (13) are all arranged with nut (14), and this earth terminal (13) connects earth connection; And
Be arranged on the insulating bar Connection Element (15) of wire clamp body the second end.
2. the earthing device for 10kV cable branch box, ring main unit, looped network case as claimed in claim 1, is characterized in that, between nut (14) and earth terminal (13), is provided with packing ring (16).
3. the earthing device for 10kV cable branch box, ring main unit, looped network case as claimed in claim 1, it is characterized in that axial screw connection when the two ends of described insulating bar are all fixedly installed for hanging wire, clamp nut and the instrument of removing cable terminal insulation sealing cap.
CN201320244364.5U 2013-05-08 2013-05-08 Grounding device for 10kV cable branch box, ring main unit and ring main box Active CN203398357U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320244364.5U CN203398357U (en) 2013-05-08 2013-05-08 Grounding device for 10kV cable branch box, ring main unit and ring main box

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320244364.5U CN203398357U (en) 2013-05-08 2013-05-08 Grounding device for 10kV cable branch box, ring main unit and ring main box

Publications (1)

Publication Number Publication Date
CN203398357U true CN203398357U (en) 2014-01-15

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ID=49909859

Family Applications (1)

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CN201320244364.5U Active CN203398357U (en) 2013-05-08 2013-05-08 Grounding device for 10kV cable branch box, ring main unit and ring main box

Country Status (1)

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CN (1) CN203398357U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103268991A (en) * 2013-05-08 2013-08-28 国家电网公司 Grounding device for 10kv cable branch box, ring main unit and ring main box
CN104112919A (en) * 2014-07-29 2014-10-22 国网福建晋江市供电有限公司 Ground wire special for low-voltage meter box
CN104167616A (en) * 2014-09-05 2014-11-26 江苏东升电子科技有限公司 Wiring terminal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103268991A (en) * 2013-05-08 2013-08-28 国家电网公司 Grounding device for 10kv cable branch box, ring main unit and ring main box
CN104112919A (en) * 2014-07-29 2014-10-22 国网福建晋江市供电有限公司 Ground wire special for low-voltage meter box
CN104167616A (en) * 2014-09-05 2014-11-26 江苏东升电子科技有限公司 Wiring terminal

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