CN205264487U - A three -phase current transformer for column switch - Google Patents
A three -phase current transformer for column switch Download PDFInfo
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- CN205264487U CN205264487U CN201520951275.3U CN201520951275U CN205264487U CN 205264487 U CN205264487 U CN 205264487U CN 201520951275 U CN201520951275 U CN 201520951275U CN 205264487 U CN205264487 U CN 205264487U
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- current transformer
- pole switch
- external insulation
- pole
- insulation housing
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Abstract
The utility model relates to an electric detection technical field especially relates to a three -phase current transformer for column switch. This a three -phase current transformer for column switch includes outer insulating housing, the internal insulation body, three troidal core and three winding, three -phase current transformer sets up on column switch's a conducting rod, realize double -deck compound inslation through setting up of the outer insulating housing and the internal insulation body, security and reliability that current transformer used have been promoted by a wide margin, particularly, outer insulating housing's a conducting rod is crossed line hole department and is had projecting part, projecting part's terminal surface is and seals the adhesive cambered surface of utmost point post admittedly, setting through this projecting part and cambered surface, make current transformer and the solid utmost point post that seals adhere better, prevent to discharge, the security performance is better, and the current transformer of this kind of integrated form sets up simple structure, thus the cost is reduced.
Description
Technical field
The utility model relates to electric detection technique field, relates in particular to a kind of threephase current transformer for on-pole switch.
Background technology
At present; on-pole switch; particularly outdoor high-voltage vacuum breaker (claiming again: outdoor pvs (pole-mounted vacuum switch)) can cut-off, close line load electric current, overload current and short circuit current; line sectionalizing, protection and control that it is widely used in transformer station, urban and rural power grids and industrial and mining enterprises' distribution system, be more suitable for the place of rural power grids and frequent operation. Its structure mainly comprises the parts such as shell, operating mechanism, pole, pole can be made as one or more according to the concrete condition of unidirectional or heterogeneous electricity, the side of pole has the primary conductive bar (being generally copper rod) stretching out, by this primary conductive bar, on-pole switch is connected with a corresponding cable or other external circuitses.
For the electric current on on-pole switch is monitored and is protected, conventionally on primary conductive bar, current transformer is set, the existing current transformer being arranged on primary conductive bar adopts poured with epoxy resin to form conventionally, uvioresistant, hydrophobicity, weatherability, poor reliability; And current transformer cable-through hole and pole bonding place be plane, bad with coordinating of pole, and then the situation of guiding discharge occurs, and affects electric power safety.
In addition, for three-phase on-pole switch, there is the scheme that on three primary conductive bars, corresponding Split type current transformer is set respectively and carries out current measurement; this split type current transformer; realize zero-sequenceprotection and must ZCT be installed in addition, complex structure, cost is higher.
Therefore,, for above deficiency, need to provide a kind of threephase current transformer for on-pole switch.
Utility model content
(1) technical problem that will solve
The purpose of this utility model is to provide that a kind of threephase current transformer for on-pole switch is poor with the performance reliability that solves existing on-pole switch current transformer and exist, to realize zero-sequenceprotection complex structure cost high and easily cause the problem of electric leakage.
(2) technical scheme
In order to solve the problems of the technologies described above, the utility model provides a kind of threephase current transformer for on-pole switch, it comprises external insulation housing, interior insulator, three annular cores and three phase sequence windings, the winding of each phase sequence winding forms a mutual inductor unit on a corresponding annular core, three mutual inductor units are successively set in external insulation housing, described interior insulator is the interior casting epoxy resin formation of insulation shell outside, primary conductive bar cable-through hole is left in the corresponding position of described external insulation housing and described mutual inductor unit center, and the primary conductive bar cable-through hole place of described external insulation housing has projection, the end face of each described projection is the cambered surface bonding with pole.
Wherein, the material of described external insulation housing is silicon rubber.
Wherein, described external insulation housing also has projection away from a side of described pole, and described primary conductive bar cable-through hole is through this projection.
Wherein, the secondary wiring exit of described external insulation housing has insulation tower skirt section and divides.
Wherein, described insulation tower skirt section is divided and is inserted with secondary wiring conduit.
Wherein, described secondary wiring conduit is telescopic tube.
Wherein, also comprise a runway iron core and a zero sequence winding, the winding of zero sequence winding forms a mutual inductor unit on runway iron core, and runway iron core is arranged on the side of three annular cores that are arranged in order.
(3) beneficial effect
Technique scheme tool of the present utility model has the following advantages: the threephase current transformer for on-pole switch that the utility model provides, threephase current transformer is arranged on the primary conductive bar of on-pole switch, three primary conductive bars are respectively through corresponding three primary conductive bar cable-through holes, realize two-layer compound insulation by arranging of external insulation housing and interior insulator, significantly promote the safety and reliability that current transformer uses, particularly, the primary conductive bar cable-through hole place of external insulation housing has projection, the end face of projection is the cambered surface bonding with pole, by the setting of this projection and cambered surface, current transformer and pole are pasted better bonding, prevent electric discharge, security performance is better, and the current transformer of this integrated form arranges simple in structure, reduce cost.
Brief description of the drawings
Fig. 1 is the front view of the utility model embodiment for the threephase current transformer of on-pole switch;
Fig. 2 is the top view of the utility model embodiment for the threephase current transformer of on-pole switch;
Fig. 3 is the cutaway view of the utility model embodiment for the threephase current transformer of on-pole switch.
In figure, 1: primary conductive bar cable-through hole; 2: insulation tower skirt section is divided; 3: secondary wiring conduit; 4: external insulation housing; 5: projection; 6: cambered surface; 7: interior insulator; 8: winding; 9: annular core; 10: runway iron core.
Detailed description of the invention
Below in conjunction with drawings and Examples, detailed description of the invention of the present utility model is described in further detail. Following examples are used for illustrating the utility model, but are not used for limiting scope of the present utility model.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", orientation or the position relationship of instructions such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of device or the element of instruction or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.
In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be also electrical connection; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals. For the ordinary skill in the art, can concrete condition understand the concrete meaning of above-mentioned term in the utility model.
As Fig. 1, shown in Fig. 2 and Fig. 3, the threephase current transformer for on-pole switch that the utility model provides comprises external insulation housing 4, interior insulator 7, three annular cores 9 and three windings 8, each winding 8 windings form a mutual inductor unit on a corresponding annular core 9, three mutual inductor units are successively set in external insulation housing 4, described interior insulator 7 is the interior casting epoxy resin formation of insulation shell outside, described external insulation housing 4 leaves primary conductive bar cable-through hole 1 with corresponding position, described mutual inductor unit center, and primary conductive bar cable-through hole 1 place of described external insulation housing 4 has projection 5, the end face of each described projection 5 is the cambered surface 6 bonding with pole.
In above-described embodiment, threephase current transformer is arranged on the primary conductive bar of on-pole switch, three primary conductive bars are respectively through corresponding three primary conductive bar cable-through holes 1, realize two-layer compound insulation by arranging of external insulation housing 4 and interior insulator 7, significantly promote the safety and reliability that current transformer uses, particularly, primary conductive bar cable-through hole 1 place of external insulation housing 4 has projection 5, the end face of projection 5 is the cambered surface 6 bonding with pole, by the setting of this projection 5 and cambered surface 6, make current transformer and pole bonding better, prevent electric discharge, security performance is better, and the current transformer of this integrated form arranges simple in structure, reduce cost.
Particularly, the material of described external insulation housing 4 is silicon rubber, silicon rubber insulation superior performance, and hydrophobicity, uvioresistant and strong shock resistance, so adopt the material of silicon rubber as external insulation housing 4.
Further, external insulation housing 4 also has projection away from a side of described pole, described primary conductive bar cable-through hole 1, through this projection, is convenient to the installation of primary conductive bar and increases creep age distance avoid primary conductive bar arc discharge by the setting of this projection.
Further, the secondary wiring exit of described external insulation housing 4 has outward extending insulation tower skirt section and divides 2, prevents electric leakage; Described insulation tower skirt section divides 2 to be inserted with secondary wiring conduit 3, the convenient guiding to secondary wiring.
Further, secondary wiring conduit 3 is telescopic tube, can, according to the difference of different on-pole switch primary conductive bar height, determine the length of secondary wiring conduit 3, to adapt to the on-pole switch of different model like this.
Further, as shown in Figure 3, the utility model also comprises a runway iron core 10 and a zero sequence winding, and the winding of zero sequence winding forms a mutual inductor unit on runway iron core 10, and runway iron core 10 is arranged on the side of three annular cores that are arranged in order.
The utility model is mainly applicable to the on-pole switch of ZW32 model, is certainly also not limited to the on-pole switch of this kind of model.
In sum, the threephase current transformer for on-pole switch that the utility model provides, realize two-layer compound insulation by arranging of external insulation housing 4 and interior insulator 7, significantly promote the safety and reliability that current transformer uses, particularly, primary conductive bar cable-through hole 1 place of external insulation housing 4 has projection 5, the end face of projection 5 is the cambered surface 6 bonding with pole, by the setting of this projection 5 and cambered surface 6, make current transformer and pole bonding better, prevent electric discharge, security performance is better; By the setting of secondary wiring conduit 3 telescopic tubes, can, according to the difference of different on-pole switch primary conductive bar height, determine the length of secondary wiring conduit 3, to adapt to the on-pole switch of different model.
The above is only preferred embodiment of the present utility model; should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model know-why; can also make some improvement and modification, these improve and modification also should be considered as protection domain of the present utility model.
Claims (7)
1. for a threephase current transformer for on-pole switch, it is characterized in that: outside it comprisesInsulation shell, interior insulator, three annular cores and three phase sequence windings, each phase sequence windingWinding forms a mutual inductor unit on a corresponding annular core, three mutual inductor unitsBe successively set in external insulation housing, described interior insulator is for pouring into a mould epoxy in insulation shell outsideResin forms, and the corresponding position of described external insulation housing and described mutual inductor unit center leaves oneInferior conducting rod cable-through hole, and the primary conductive bar cable-through hole place of described external insulation housing has protrusionPart, the end face of each described projection is the cambered surface bonding with pole.
2. the threephase current transformer for on-pole switch according to claim 1, its spyLevy and be: the material of described external insulation housing is silicon rubber.
3. the threephase current transformer for on-pole switch according to claim 2, its spyLevy and be: described external insulation housing also has projection away from a side of described pole,Described primary conductive bar cable-through hole is through this projection.
4. the threephase current transformer for on-pole switch according to claim 3, its spyLevy and be: the secondary wiring exit of described external insulation housing has insulation tower skirt section and divides.
5. the threephase current transformer for on-pole switch according to claim 4, its spyLevy and be: described insulation tower skirt section is divided and is inserted with secondary wiring conduit.
6. the threephase current transformer for on-pole switch according to claim 5, its spyLevy and be: described secondary wiring conduit is telescopic tube.
7. the threephase current transformer for on-pole switch according to claim 1, its spyLevy and be: also comprise a runway iron core and a zero sequence winding, the winding of zero sequence winding is at runwayOn iron core, form a mutual inductor unit, runway iron core is arranged on three annular iron that are arranged in orderThe side of core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520951275.3U CN205264487U (en) | 2015-11-25 | 2015-11-25 | A three -phase current transformer for column switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520951275.3U CN205264487U (en) | 2015-11-25 | 2015-11-25 | A three -phase current transformer for column switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205264487U true CN205264487U (en) | 2016-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520951275.3U Active CN205264487U (en) | 2015-11-25 | 2015-11-25 | A three -phase current transformer for column switch |
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| Country | Link |
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| CN (1) | CN205264487U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106653340A (en) * | 2016-12-16 | 2017-05-10 | 北京瑞奇恩互感器设备有限公司 | Pole-mounted current sensor |
-
2015
- 2015-11-25 CN CN201520951275.3U patent/CN205264487U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106653340A (en) * | 2016-12-16 | 2017-05-10 | 北京瑞奇恩互感器设备有限公司 | Pole-mounted current sensor |
| CN106653340B (en) * | 2016-12-16 | 2019-02-19 | 北京瑞奇恩互感器设备有限公司 | Current sensor on column |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |