CN203910514U - Oil-immersed current transformer - Google Patents
Oil-immersed current transformer Download PDFInfo
- Publication number
- CN203910514U CN203910514U CN201420340060.3U CN201420340060U CN203910514U CN 203910514 U CN203910514 U CN 203910514U CN 201420340060 U CN201420340060 U CN 201420340060U CN 203910514 U CN203910514 U CN 203910514U
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- Prior art keywords
- oil
- fuel tank
- current transformer
- tank
- winding
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Abstract
The utility model discloses an oil-immersed current transformer. The oil-immersed current transformer comprises a body and an oil tank full of transformer oil, wherein the oil tank comprises an upper oil tank body and a lower oil tank body which are buckled with each other; a porcelain bushing is fixed on the upper oil tank body and extends upwards from the upper oil tank body; an oil conservator is fixed at the extending end of the porcelain bushing; four outgoing terminals of a primary winding and a connection terminal for series-parallel connection are arranged on the oil conservator. According to the oil-immersed current transformer, the originally integrally-molded oil tank is divided into the upper oil tank body and the lower oil tank body which are connected together through threads, so that dismounting is more convenient while the air tightness of the upper oil tank body and the lower oil tank body is fully guaranteed, and cleaning is also facilitated; besides, the four outgoing terminals of the primary winding and the connection terminal for series-parallel connection are arranged on the oil conservator of the oil-immersed current transformer, so that series-parallel connection operations can be conducted without modification to circuits, and functions are more complete.
Description
Technical field
The utility model relates to electric equipment field, particularly relates to a kind of oil-immersed current transformer.
Background technology
Current transformer principle is according to electromagnetic induction principle.Current transformer is comprised of closed iron core and winding.Its umber of turn seldom; in the circuit of the electric current that string is measured at needs; therefore it often has whole electric currents of circuit to flow through; secondary winding turn ratio is more; be serially connected in measuring instrument and protection loop, current transformer is when work, and its 2 minor loops are closed all the time; therefore the impedance of measuring instrument and protection loop series coil is very little, and the operating state of current transformer approaches short circuit.
In prior art, in the Chinese utility model patent prospectus that is 201220100435.X in the patent No., a kind of oil-immersed current transformer is disclosed, comprise base, fuel tank, outlet box, insulator and primary connection terminal, described base is provided with described fuel tank, described fuel tank is provided with described insulator, described outlet box is located on a sidepiece of described fuel tank, also comprise oil conservator and oil level inspection hole, described insulator is provided with described oil conservator, described oil conservator is provided with expander, described oil level inspection hole is located on a sidepiece of described expander, the bottom of described fuel tank is provided with fuel outlet valve, described insulator is the insulator that a plurality of large umbellules are cross-linked, overall mechanical strength and the sealing of this kind of oil-immersed current transformer are all improved, and current transformer is difficult for aging, has improved sealing property, and then instrument transformer is more reliable, long service life, and current transformer is applicable to the higher area of gradation for surface pollution.
But, oil-immersed current transformer in above-mentioned patent, on its oil conservator, be only provided with the binding post of a winding, when the circuit of some more complicated of reply, due to not for series-parallel binding post, need to carry out a modification to whole circuit, adapt to this oil-immersed current transformer, very inconvenient; In addition,, in the oil-immersed current transformer of above-mentioned patent, fuel tank is to seal one, after work a period of time, impurity in some transformer oil can be deposited in bottom, insulator or the oil conservator of fuel tank, because fuel tank is to be wholely set, is therefore difficult to clean.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of oil-immersed current transformer that can carry out connection in series-parallel and can conveniently clean fuel tank internal with external circuitry for the above-mentioned state of the art.
For achieving the above object, key is to improve the line position that of the structure of insulator in high-low pressure instrument transformer and low-pressure end, improves the air-tightness of insulator.For this reason, the utility model provides following technical scheme:
An oil-immersed current transformer, includes device body and the fuel tank that is full of transformer oil, and described device body is inserted in described fuel tank, and wherein, described fuel tank includes top tank and lower fuel tank, and described top tank and lower fuel tank are threaded connection and snap together;
Described device body includes the iron core of vertical setting, is arranged with the secondary winding of winding and chain on described iron core, and a described winding is arranged in top tank, and described secondary winding is arranged in lower fuel tank, and the number of turn of a described winding is less than secondary winding;
On described top tank, being fixed with can be by the insulator of described parcel unshakable in one's determination, and described insulator one end is fixed on top tank, and the other end is elongated end, by described top tank, is extended upward, and on the end of described insulator elongated end, is fixed with oil conservator;
On described oil conservator, be provided with outlet terminal and a connection terminal of doing connection in series-parallel of four described windings.
Adopt the oil-immersed current transformer of this structure, due to original integrated fuel tank has been divided into top tank and lower fuel tank, and top tank and lower fuel tank are threaded connection and snap together, this is fully guaranteeing the bubble-tight while (air-tightness being threaded is higher) between top tank and lower fuel tank, when needs clean fuel tank internal, top tank and lower fuel tank dismounting can be come, make to clean convenient; In addition, in above-mentioned oil-immersed current transformer, on its oil conservator, be provided with four outlet terminals and a connection terminal of doing connection in series-parallel of a winding, like this, if this oil-immersed current transformer is had to connection in series-parallel requirement in circuit, just, without circuit is modified, only wire need to be connected on this connection terminal, make oil-immersed current transformer function of the present utility model more comprehensive.
As above-mentioned oil-immersed current transformer in the utility model preferably, described outlet terminal includes the first toggle switch, described first toggle switch one end is fixedly connected on oil conservator and by wire and is connected with a described winding, and the other end can rotate around the junction of described the first toggle switch and described oil conservator.
To adopt the oil-immersed current transformer of this structure, to be actually the situation that connects many circuits in order meeting the needs of on outlet terminal, can adjust its position by rotating this first toggle switch, avoid interfering between wire.Too flexible in order to prevent it, be generally by the first toggle switch by the rotating outer wall that is connected to oil conservator of hinged mode, and the direction of its rotation and rotational angle are limited.
As above-mentioned oil-immersed current transformer in the utility model further preferably, described connecting end includes the second toggle switch, described second toggle switch one end is fixed on described oil conservator and by wire and is connected with a described winding, and the other end can rotate around the junction of described the second toggle switch and described oil conservator.
Adopting the oil-immersed current transformer of this structure, is in fact also in order to adapt to the needs of wiring, by rotating this second toggle switch, avoids interfering between wire.In addition, be similar to the first toggle switch, the second described toggle switch is also to adopt hinged mode to be connected on the outer wall of oil conservator.
Concrete technical scheme as oil-immersed current transformer in the utility model, described top tank is provided with internal thread or external screw thread in the side near described lower fuel tank, and described lower fuel tank is provided with in the side near described top tank external screw thread or the internal thread matching.This structure, top tank and lower fuel tank to be processed into two workpiece of shape adaptation, at the connecting portion of top tank and lower fuel tank, be provided with internal thread and the external screw thread of mutual coupling, by above-mentioned internal thread and externally threaded cooperation, top tank and lower fuel tank snapped together.The sealing being threaded is better, and than integrated fuel tank, although sealing has gap, this gap is in acceptable scope.
Improvement as oil immersed type circuit instrument transformer in the utility model, is provided with bleeder plug and earth stud on described lower fuel tank, described lower fuel tank is communicated with outside fuel tap by this bleeder plug.Above-mentioned oil immersion type mutual-inductor can be fixed by ground connection screw thread, and is connected with outside fuel tap by bleeder plug, thereby make transformer oil in fuel tap can enter into instrument transformer, forms a flow circuit, avoids transformer oil deterioration.
In sum, compared with prior art, the utility model has the advantage of: be by original integrated fuel tank has been divided into top tank and lower fuel tank, and top tank and lower fuel tank are threaded connection and snap together, this is fully guaranteeing the bubble-tight while (air-tightness being threaded is higher) between top tank and lower fuel tank, when needs clean fuel tank internal, top tank and lower fuel tank dismounting can be come, make to clean convenient; In addition, in above-mentioned oil-immersed current transformer, on its oil conservator, be provided with four outlet terminals and a connection terminal of doing connection in series-parallel of a winding, like this, if this oil-immersed current transformer is had to connection in series-parallel requirement in circuit, just, without circuit is modified, only wire need to be connected on this connection terminal, make oil-immersed current transformer function of the present utility model more comprehensive.
Accompanying drawing explanation
Fig. 1 is the front view of oil-immersed current transformer in the utility model embodiment;
Fig. 2 is the installation site cutaway view of oil-immersed current transformer inner core in the utility model embodiment;
Fig. 3 is the end view of oil-immersed current transformer in the utility model embodiment;
Fig. 4 is the structural representation of oil-immersed current transformer inner iron core in the utility model embodiment.
Reference numeral:
1, device body; 1.1, iron core; 2, fuel tank; 2.1, top tank; 2.2, lower fuel tank; 2.2.1, lower fuel tank top; 2.2.2, square pedestal; 3, a winding; 4, secondary winding; 5, insulation division; 6, insulator; 7, oil conservator; 7.1, outlet terminal; 7.1.1, the first toggle switch; 7.2, connect terminal; 7.2.1, the second toggle switch; 8, bleeder plug; 9, earth stud.
Embodiment
In this manual, easy in order to narrate, be with oil-immersed current transformer normal operating conditions as a reference, the top of the oil-immersed current transformer under this state is called to top, and with this like.
Below in conjunction with accompanying drawing, embodiment is described in further detail the utility model.
As depicted in figs. 1 and 2, the present embodiment is a kind of oil-immersed current transformer, include device body 1 and the fuel tank 2 that is full of transformer oil, described device body is inserted in described fuel tank, in order conveniently to clean, in the present embodiment, described fuel tank is divided into top tank 2.1 and lower fuel tank 2.2, the similar hemisphere of top tank shape, lower fuel tank top 2.2.1 is arranged to a hemisphere matching with top tank shape, bottom is a square pedestal 2.2.2, on described square pedestal, be provided with bleeder plug 8 and earth stud 9, described lower fuel tank is communicated with outside fuel tap (not shown) by this bleeder plug 8, by this earth stud 9, whole oil-immersed current transformer is fixed on working face.In the hemispheroidal bottom of described top tank, be provided with internal thread, on the top of described lower fuel tank hemisphere, be provided with the external screw thread with above-mentioned internal thread interlock, by described internal thread and externally threaded cooperation by top tank with lower fuel tank is dismountable links together.
As shown in Figure 3 and Figure 4, described device body includes the iron core 1.1 of vertical setting, described iron core is the iron core of a strip, longitudinally be arranged in fuel tank, and across above-mentioned top tank 2.1 and lower fuel tank 2.2, on this iron core 1.1, be wound with winding 3 and and the secondary winding 4 of chain, between winding and secondary winding, be short-circuited, between winding and secondary winding, be provided with insulation division 5, because this insulation division is immersed in transformer oil, therefore the preferred rubber that adopts is as the making material of insulation division in the present embodiment.
Because winding is input winding, secondary winding is output winding, and therefore the number of turn of a winding will be far smaller than the number of turn of secondary winding, so just can between winding and secondary winding, form a potential difference.
On described top tank, be fixed with insulator 6, described insulator one end is fixed on top tank, and the other end is elongated end, by described top tank, is extended straight up, is fixed with oil conservator 7 on the end of described insulator elongated end;
On described oil conservator, be hinged with outlet terminal 7.1 and a connection terminal 7.2 of doing connection in series-parallel of four described windings.
Described outlet terminal includes the first toggle switch 7.1.1, described first toggle switch one end is hinged on oil conservator 7 and by wire and is connected with a described winding, it is fulcrum that the other end can be take the junction of described the first toggle switch and described oil conservator in perpendicular or horizontal plane, around this fulcrum, rotate, and the rotational angle range of this rotation is in 180 degree.
Described connecting end includes the second toggle switch 7.2.1, described second toggle switch one end is hinged on described oil conservator 7 and by wire and is connected with a described winding, it is fulcrum that the other end can be take the junction of described the first toggle switch and described oil conservator in perpendicular or horizontal plane, around this fulcrum, rotate, and the rotational angle range of this rotation is in 180 degree.
The above is only preferred implementation of the present utility model, and protection range of the present utility model is also not only confined to above-described embodiment, and all technical schemes belonging under the utility model thinking all belong to protection range of the present utility model.It should be pointed out that for those skilled in the art, in the some improvements and modifications that do not depart under the utility model principle prerequisite, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (5)
1. an oil-immersed current transformer, include device body and the fuel tank that is full of transformer oil, described device body is inserted in described fuel tank, it is characterized in that: described fuel tank includes top tank and lower fuel tank, and described top tank and lower fuel tank are threaded connection and snap together;
Described device body includes the iron core of vertical setting, is arranged with the secondary winding of winding and chain on described iron core, and a described winding is arranged in top tank, and described secondary winding is arranged in lower fuel tank, and the number of turn of a described winding is less than secondary winding;
On described top tank, being fixed with can be by the insulator of described parcel unshakable in one's determination, and described insulator one end is fixed on top tank, and the other end is elongated end, by described top tank, is extended upward, and on the end of described insulator elongated end, is fixed with oil conservator;
On described oil conservator, be provided with outlet terminal and a connection terminal of doing connection in series-parallel of four described windings.
2. oil-immersed current transformer according to claim 1, it is characterized in that: described outlet terminal includes the first toggle switch, described first toggle switch one end is fixedly connected on oil conservator and by wire and is connected with a described winding, and the other end can rotate around the junction of described the first toggle switch and described oil conservator.
3. oil-immersed current transformer according to claim 1 and 2, it is characterized in that: described connecting end includes the second toggle switch, described second toggle switch one end is fixed on described oil conservator and by wire and is connected with a described winding, and the other end can rotate around the junction of described the second toggle switch and described oil conservator.
4. oil-immersed current transformer according to claim 1, it is characterized in that: described top tank is provided with internal thread or external screw thread in the side near described lower fuel tank, described lower fuel tank is provided with in the side near described top tank external screw thread or the internal thread matching.
5. oil-immersed current transformer according to claim 1, is characterized in that: on described lower fuel tank, be provided with bleeder plug and earth stud, described lower fuel tank is communicated with outside fuel tap by this bleeder plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420340060.3U CN203910514U (en) | 2014-06-24 | 2014-06-24 | Oil-immersed current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420340060.3U CN203910514U (en) | 2014-06-24 | 2014-06-24 | Oil-immersed current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203910514U true CN203910514U (en) | 2014-10-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420340060.3U Expired - Fee Related CN203910514U (en) | 2014-06-24 | 2014-06-24 | Oil-immersed current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203910514U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105244158A (en) * | 2015-10-21 | 2016-01-13 | 成都迅德科技有限公司 | Current transformer |
| CN109378201A (en) * | 2018-11-23 | 2019-02-22 | 厦门大互科技有限公司 | The current transformer of 35kV or less an epoxy resin pouring tap of band |
-
2014
- 2014-06-24 CN CN201420340060.3U patent/CN203910514U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105244158A (en) * | 2015-10-21 | 2016-01-13 | 成都迅德科技有限公司 | Current transformer |
| CN109378201A (en) * | 2018-11-23 | 2019-02-22 | 厦门大互科技有限公司 | The current transformer of 35kV or less an epoxy resin pouring tap of band |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141029 Termination date: 20150624 |
|
| EXPY | Termination of patent right or utility model |