CN203895640U - Grounding point switching device of secondary neutral grounding wire of voltage transformer - Google Patents
Grounding point switching device of secondary neutral grounding wire of voltage transformer Download PDFInfo
- Publication number
- CN203895640U CN203895640U CN201420201987.9U CN201420201987U CN203895640U CN 203895640 U CN203895640 U CN 203895640U CN 201420201987 U CN201420201987 U CN 201420201987U CN 203895640 U CN203895640 U CN 203895640U
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- China
- Prior art keywords
- voltage transformer
- secondary neutral
- wire
- grounding
- point
- 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.)
- Expired - Lifetime
Links
- 230000007935 neutral effect Effects 0.000 title claims abstract description 54
- 239000004020 conductor Substances 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims abstract 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 239000012943 hotmelt Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 claims 1
- 238000002788 crimping Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Supply And Distribution Of Alternating Current (AREA)
Abstract
本实用新型提供一种电压互感器二次中性接地线的接地点转接装置，包括由导电材料制成的本体、位于所述本体上且用于固定电压互感器二次中性接地线导电端的至少一个转接安装点以及位于所述本体上且用于固定接地线的至少一个地线安装点。实施本实用新型实施例提供的电压互感器二次中性接地线的接地点转接装置，确保电压互感器二次中性线接地的接地点正确性，保证电网安全稳定运行。
The utility model provides a grounding point transfer device for the secondary neutral grounding wire of a voltage transformer, which comprises a body made of conductive material, which is located on the body and is used to fix the conductive wire of the secondary neutral grounding wire of the voltage transformer. At least one transfer installation point on the end and at least one ground wire installation point on the body for fixing the ground wire. Implementing the grounding point transfer device for the secondary neutral grounding wire of the voltage transformer provided by the embodiment of the utility model ensures the correctness of the grounding point of the secondary neutral grounding line of the voltage transformer and ensures the safe and stable operation of the power grid.
Description
Technical field
The utility model relates to electric power system substation equipment maintenance and repair technical field, relates in particular to a kind of earth point switching device of voltage transformer secondary neutral ground line.
Background technology
Along with developing rapidly of electric power system, the capacity of short circuit of electric power system is also increasing, and the earth current maximum producing while making short circuit can reach several kiloamperes, therefore, when electric power system is broken down, easily in main grounding system, will produce unbalance voltage.
At present; electric grid secondary system electrical grounding system is introduced in the middle of voltage transformer secondary system; this grounding system can effectively stop the unbalance voltage of main grounding system; thereby avoid the generation of secondary device damage and maloperation situation; but because many-sided reason causes the electrical secondary system ground connection of voltage transformer lack of standardization; cause voltage transformer secondary neutral point excursion, finally cause relaying protection incorrect operation.Especially the earth point of voltage transformer secondary neutral ground line is lack of standardization, the phenomenon such as usually cause that the virtual connection of secondary neutral ground line appears in voltage transformer, vacation connects and earth point is unreliable, 1., the material (as parts such as bolt, nut, pads) selected is lack of standardization the reason that causes above-mentioned phenomenon to occur is:; 2., earth terminal adopts the connected modes lack of standardization such as the corresponding copper lug of crimping; 3., electrical secondary system when construction, because workmen's technical merit is low, cause the earth point of secondary neutral ground line lack of standardization; 4., because equipment implementing process is poor or long-time running, voltage transformer secondary system insulation is damaged, cause the earth point of neutral ground line lack of standardization; 5. the construction reference that, lacks the earth point of standard voltage transformer secondary neutral ground line.
Utility model content
The utility model embodiment technical problem to be solved is, a kind of earth point switching device of voltage transformer secondary neutral ground line is provided, and guarantees the earth point correctness of voltage transformer secondary neutral earthing, guarantees power network safety operation.
In order to solve the problems of the technologies described above, the utility model embodiment provides a kind of earth point switching device of voltage transformer secondary neutral ground line, comprises the body made by electric conducting material, is positioned on described body and at least one switching mounting points of fixed voltage instrument transformer secondary neutral ground line conducting end and be positioned on described body and at least one ground wire mounting points of dead earth line.
Wherein, described switching mounting points is threaded mounting hole, described voltage transformer secondary neutral ground line conducting end is arranged between described threaded mounting hole and bolt, described bolt inserts in described threaded mounting hole and is threaded with described threaded mounting hole, makes described voltage transformer secondary neutral ground line conducting end and the laminating of described body.
Wherein, described switching mounting points is described body from the outer surface projection that certain length forms that stretches out, and described projection is connected with described voltage transformer secondary neutral ground line conducting end.
Wherein, described projection and described voltage transformer secondary neutral ground line conducting end connected mode for bundle connects, hot melt socket or by clamp clamping.
Wherein, described ground wire mounting points has two, lays respectively at the two ends of described body.
Wherein, described body is provided with for shielding with voltage transformer secondary interface at least one fixing hole fixing.
Wherein, described body is copper bar metallic conductor.
Implement the utility model embodiment, there is following beneficial effect:
In the utility model embodiment, owing to only voltage transformer secondary neutral ground line conducting end need being fixed in the switching mounting points of device, and be connected with the earth by the ground wire mounting points on this device, its mounting means (as by bolt, secondary neutral ground line conducting end posted and fixed on apparatus surface) easy to use and employing standard, speed of application and reliability have been improved, avoided the virtual connection of secondary neutral ground line, vacation connects and earth point is unreliable, thereby guarantee power network safety operation.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, the accompanying drawing that obtains other according to these accompanying drawings still belongs to category of the present utility model.
The structural representation of the earth point switching device of the voltage transformer secondary neutral ground line that Fig. 1 provides for the utility model embodiment;
In figure: 1-body, the 2-mounting points of transferring, 3-ground wire mounting points, 4-fixing hole, bis-neutral ground lines of 5-, 6-earth connection.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, in the utility model embodiment, for a kind of earth point switching device of voltage transformer secondary neutral ground line, comprise the body 1 made by electric conducting material, be positioned on body 1 and at least one switching mounting points 2 of fixed voltage instrument transformer secondary neutral ground line conducting end and be positioned on body 1 and at least one ground wire mounting points 3 of dead earth line.
This switching mounting points 2 has a plurality of, can be threaded mounting hole or body 1 from the outer surface projection that certain length forms that stretches out.When this switching mounting points 2 adopts threaded mounting hole, voltage transformer secondary neutral ground line 5 conducting end are arranged between threaded mounting hole and bolt, this bolt inserts in threaded mounting hole and is threaded with threaded mounting hole, and voltage transformer secondary neutral ground line 5 conducting end and body 1 are fitted tightly; When this switching mounting points 2 be when projection, this projection is connected with voltage transformer secondary neutral ground line 5 conducting end, and their connected mode connects for tying, hot melt is socketed or by clamp clamping, its firm and reliable connection.
This ground wire mounting points 3 has two, lay respectively at the two ends of body 1, its structure can be identical with structure and the shape of switching mounting points 2 with shape, the connected mode that connects mounting points 2 and voltage transformer secondary neutral ground line 5 conducting end with the connected mode transfer of earth connection 6 is identical, at this, does not repeat one by one.
Further, body 1 is provided with for shielding with voltage transformer secondary interface at least one fixing hole 4 fixing, and adopts securing member (as screw) body 1 can be fixed on to voltage transformer secondary interface screen bottom (not shown) by this fixing hole 4.
Further, body 1 is copper bar metallic conductor.
The concrete application of the earth point switching device of the voltage transformer secondary neutral ground line that the utility model embodiment provides has the following steps:
The 1st step: adopt 100mm
2the special-purpose copper bar metallic conductor of (square millimeter), long is 80cm(centimetre) the earth point switching device body 1 of line voltage instrument transformer secondary neutral ground line;
The 2nd step: the earth point switching device body 1 of this line voltage instrument transformer secondary neutral ground line is fixed on to voltage transformer secondary interface screen bottom;
The 3rd step: earth connection 6 is used cross section to be not less than 50 mm
2copper cable, its one end adopts φ 10mm(millimeter) bolt crimping (containing nut, pad) is fixed on this earth connection in ground wire mounting points 3, the other end is connected to geodetic network;
The 4th step: in the switching mounting points 2 of successively at least one (as N bar) voltage transformer secondary neutral ground line 5 being guided on device body 1, all secondary neutral ground lines 5 all adopt cross section to be not less than 4mm
2copper cash, and then adopt successively φ 6mm bolt crimping (containing nut, pad) that voltage transformer secondary neutral ground line 4 and switching mounting points 2 are fixed;
The 5th step: each the switching mounting points 2 on the earth point switching device of check voltage transformer secondary neutral ground line and the connection of ground wire mounting points 3 successively, until firm and reliable connection.
Implement the utility model embodiment, there is following beneficial effect:
In the utility model embodiment, owing to only voltage transformer secondary neutral ground line conducting end need being fixed in the switching mounting points of device, and be connected with the earth by the ground wire mounting points on this device, its mounting means (as by bolt, secondary neutral ground line conducting end posted and fixed on apparatus surface) easy to use and employing standard, speed of application and reliability have been improved, avoided the virtual connection of secondary neutral ground line, vacation connects and earth point is unreliable, thereby guarantee power network safety operation.
Above disclosed is only a kind of preferred embodiment of the utility model, certainly can not limit with this interest field of the utility model, and the equivalent variations of therefore doing according to the utility model claim, still belongs to the scope that the utility model is contained.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420201987.9U CN203895640U (en) | 2014-04-24 | 2014-04-24 | Grounding point switching device of secondary neutral grounding wire of voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420201987.9U CN203895640U (en) | 2014-04-24 | 2014-04-24 | Grounding point switching device of secondary neutral grounding wire of voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203895640U true CN203895640U (en) | 2014-10-22 |
Family
ID=51722000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420201987.9U Expired - Lifetime CN203895640U (en) | 2014-04-24 | 2014-04-24 | Grounding point switching device of secondary neutral grounding wire of voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203895640U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109088183A (en) * | 2018-06-28 | 2018-12-25 | 上海市安装工程集团有限公司 | A kind of transformer neutral earthing device and installation method |
-
2014
- 2014-04-24 CN CN201420201987.9U patent/CN203895640U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109088183A (en) * | 2018-06-28 | 2018-12-25 | 上海市安装工程集团有限公司 | A kind of transformer neutral earthing device and installation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141022 |