CN203535177U - Point discharge test device for primary guide rod of current transformer - Google Patents
Point discharge test device for primary guide rod of current transformer Download PDFInfo
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- CN203535177U CN203535177U CN201320603192.6U CN201320603192U CN203535177U CN 203535177 U CN203535177 U CN 203535177U CN 201320603192 U CN201320603192 U CN 201320603192U CN 203535177 U CN203535177 U CN 203535177U
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- guide rod
- current transformer
- point discharge
- discharge test
- secondary winding
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Abstract
The utility model discloses a point discharge test device for a primary guide rod of a current transformer, and the device comprises a high potential housing and the primary guide rod. The interior of the high potential housing is provided with a secondary winding. The primary guide rod passes through the secondary winding and the high potential housing. A part, which is inserted into the secondary winding, of the primary guide rod serves as an overlapped part which is provided with a metal protrusion. The device provided by the utility model can be used for simulating the situation of point discharge truly and effectively when the primary guide rod of the current transformer has a flaw, thereby contributing to the research of a flaw simulation test.
Description
Technical field
The utility model relates to High-Voltage Electrical Appliances transmission facility field, particularly relates to guide rod point discharge test unit of a kind of current transformer.
Background technology
In current transformer, be generally packaged with sulfur hexafluoride gas to be used as to insulate.The sulfur hexafluoride decomposition gas that current transformer shelf depreciation produces is known from experience erode metallic surfaces, is accelerated the aging of insulation, finally develops into disruptive discharge accident, causes very large economic loss.
In recent years, both at home and abroad sulfur hexafluoride decomposed gas component is detected and carried out large quantity research, some initial achievements have been obtained, but the shelf depreciation under various insulation defects is caused to the differences such as decomposable process, decomposition rate, decomposition product relative content and influence factor of sulfur hexafluoride gas, particularly to compare relation not clear for gas decomposition product relative content and shelf depreciation type associated, need to carry out more deep fundamental research.In deep research, how effectively to arrange defect, defect is arranged and more approach the defect that may occur in actual motion equipment, be one of factor the most key in simulated experiment.
Summary of the invention
Based on this, be necessary for prior art defect, provide a kind of can be truly, the guide rod point discharge test unit of current transformer of point discharge situation when effectively analog current mutual inductor exists defect.
Its technical scheme is as follows.
Guide rod point discharge test unit of a kind of current transformer, comprise noble potential shell and a guide rod, in described noble potential shell, be provided with Secondary Winding, a described guide rod runs through Secondary Winding and noble potential shell, a guide rod of take in a guide rod insertion Secondary Winding is partly coincidence part, is provided with metal protrusion on described coincidence part.
Metal protrusion is set on the surface of coincidence part, can effectively simulates the situation of the metal casts such as metal fragment point discharge of a guide rod surface generation when a guide rod surface, thereby be conducive to the research of defects simulation test.
Therein in an embodiment, described metal protrusion is " L " type Metallic rod, comprise interconnective horizontal part and vertical component effect, this horizontal part fits in the surperficial and parallel with its axis of a described guide rod, and described vertical component effect is perpendicular to the axis of a described guide rod.The horizontal part of " L " type Metallic rod is arranged with the axis direction of a guide rod along parallel, vertical component effect is arranged along the direction perpendicular to a guide rod azimuth axis, through electric Field Calculation, such defect arranges that electric field distortion is the most severe, a guide rod surface point discharge defect in simulation exemplary currents mutual inductor structure that can be comparatively accurate and effective.
In an embodiment, guide rod point discharge test unit of current transformer also comprises insulated support and base therein, and described noble potential shell is supported on described base by insulated support.
In an embodiment, described insulated support is insulating cylinder body, and inner chamber is set in it therein, and one end of described insulating cylinder body is connected with noble potential shell, and the other end is connected with base.
Below the advantage of the technical program or principle are described.
Metal protrusion is set on the surface of coincidence part, can effectively simulates the situation of the metal casts such as metal fragment point discharge of a guide rod surface generation when a guide rod surface, thereby be conducive to the research of defects simulation test.
Accompanying drawing explanation
Fig. 1 is the structural representation of a guide rod point discharge test unit of current transformer described in the utility model embodiment;
Fig. 2 is the partial enlarged view at A place in Fig. 1;
Description of reference numerals:
10, noble potential shell, 110, guide rods, 111, " L " type Metallic rod, 120, Secondary Winding, 20, insulated support, 30, base.
Embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is described in detail.
Guide rod point discharge test unit of current transformer, comprises noble potential shell 10, insulated support 20 and base 30 as shown in Figure 1-2, and noble potential shell 10 is supported on base 30 by insulated support 20.Insulated support 20 is insulating cylinder body, and its inside is provided with for laying the inner chamber of wire.Insulating cylinder body is the cylindrical shell of an inner hollow, and its one end is connected with noble potential shell 10, and the other end is connected with base 30.In the present embodiment, insulating cylinder body adopts silicon rubber composite insulation sleeve or high-strength ceramic sleeve, certainly also can adopt in other embodiments other materials as insulating cylinder body.In noble potential shell 10, be packaged with sulfur hexafluoride gas, with what be used as to insulate.
Wherein, guide rod point discharge test unit of current transformer also includes guide rod 110 No. one time.On noble potential shell 10, be provided with the first relative mounting hole and the second mounting hole, noble potential shell 10 inside are provided with Secondary Winding 120, a guide rod 110 is through the first mounting hole, Secondary Winding 120 and the second mounting hole, thereby run through 120, guide rod 110 levels of noble potential shell 10 and Secondary Winding through Secondary Winding 120 center.Guide rod 110 parts of take in guide rod 110 insertion Secondary Winding 120 are coincidence part, are guide rod 110 guide rod 110 parts overlapping with Secondary Winding.Metal protrusion is set on coincidence part, ties up on the surface of guide rod 110 and the lap of Secondary Winding 120 metal protrusion is set.
In the present embodiment, metal protrusion is " L " type Metallic rod 111, and it comprises horizontal part and vertical component effect, and one end of horizontal part is connected with one end of vertical component effect and makes metal protrusion integral body be " L " type.In the present embodiment, the horizontal part of " L " type Metallic rod 111 is arranged along the axis direction of a guide rod 110, and pasted on the surface of the first extension or the surface of the second extension with aluminium foil, certainly, in other is implemented, " L " type Metallic rod 111 also can adopt the modes such as welding that itself and guide rod 110 surfaces are fixed.The vertical component effect of " L " type Metallic rod 111 and the axis of a guide rod 110.In other embodiments, also can arrange that different metal protrusions carries out defects simulation.
In the process of producing or installing, guide rod 110 and the first mounting hole of noble potential shell 10 or the friction between the second mounting hole can produce metal fragment.When operation, these metal fragments easily gather formation metal tip, easily occur corona discharge defect.Through electric Field Calculation, the most severe at the electric field distortion at the coincidence part place of a guide rod 110, metal protrusion defect is set herein, a surperficial point discharge defect of guide rod 110 in simulation exemplary currents mutual inductor structure that can be comparatively accurate and effective.
Below the advantage of the utility model embodiment or principle are described.
Metal protrusion is set on the surface of coincidence part, can effectively simulates the situation of the metal casts such as metal fragment point discharge of guide rod 110 surface generations when guide rod 110 surface, thereby be conducive to the research of defects simulation test.
The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.
Claims (4)
1. guide rod point discharge test unit of a current transformer, it is characterized in that, comprise noble potential shell and a guide rod, in described noble potential shell, be provided with Secondary Winding, a described guide rod runs through Secondary Winding and noble potential shell, a guide rod of take in a guide rod insertion Secondary Winding is partly coincidence part, is provided with metal protrusion on described coincidence part.
2. guide rod point discharge test unit of current transformer according to claim 1, it is characterized in that, described metal protrusion is " L " type Metallic rod, " L " type Metallic rod comprises interconnective horizontal part and vertical component effect, and this horizontal part fits in the surperficial and parallel with its axis of a described guide rod.
3. guide rod point discharge test unit of current transformer according to claim 1 and 2, is characterized in that, also comprise insulated support and base, described noble potential shell is supported on described base by insulated support.
4. guide rod point discharge test unit of current transformer according to claim 3, is characterized in that, described insulated support is insulating cylinder body, and one end of described insulating cylinder body is connected with noble potential shell, and the other end is connected with base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320603192.6U CN203535177U (en) | 2013-09-27 | 2013-09-27 | Point discharge test device for primary guide rod of current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320603192.6U CN203535177U (en) | 2013-09-27 | 2013-09-27 | Point discharge test device for primary guide rod of current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203535177U true CN203535177U (en) | 2014-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320603192.6U Expired - Lifetime CN203535177U (en) | 2013-09-27 | 2013-09-27 | Point discharge test device for primary guide rod of current transformer |
Country Status (1)
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| CN (1) | CN203535177U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110456240A (en) * | 2019-08-12 | 2019-11-15 | 哈尔滨电机厂有限责任公司 | A kind of test method of detection stator winding end air ionization electric discharge |
-
2013
- 2013-09-27 CN CN201320603192.6U patent/CN203535177U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110456240A (en) * | 2019-08-12 | 2019-11-15 | 哈尔滨电机厂有限责任公司 | A kind of test method of detection stator winding end air ionization electric discharge |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140409 |
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| CX01 | Expiry of patent term |