CN104237835A - Wiring detection device for straight-through current transformer - Google Patents
Wiring detection device for straight-through current transformer Download PDFInfo
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- CN104237835A CN104237835A CN201410445834.3A CN201410445834A CN104237835A CN 104237835 A CN104237835 A CN 104237835A CN 201410445834 A CN201410445834 A CN 201410445834A CN 104237835 A CN104237835 A CN 104237835A
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Abstract
The invention discloses a wiring detection device for a straight-through current transformer. The wiring detection device comprises a cable transformation ratio adjustor, an external cable, a wire inlet end and a wire outlet end, wherein test current passes through the wire inlet end and the wire outlet end. The cable transformation ratio adjustor comprises a universal switch and a coil formation circuit. The coil formation circuit is provided with a first exterior wire access end, a second exterior wire access end and a wire set electrically connected with the two exterior wire access ends. The two ends of the external cable are first and second pluggable connectors matched with the first and second exterior wire access ends in a pluggable mode. A solenoid coil is formed by electrically connecting the two ends of the external cable and the coil formation circuit in a staggered mode. The port on one side of the universal switch and the coil formation circuit are connected to conduct gating on the wire access number of the external cable, and ports on the other side of the universal switch are connected in parallel to be used as the wire inlet end. According to the wiring detection device, a through-flow test is carried out on the straight-through current transformer at a time with no independent electricity generator or a high-capacity current generator, and an external circuit does not need to be repeatedly disconnected to be wound around the current transformer in the testing process.
Description
Technical field
The device field that the present invention relates to the calibration of power equipment, calibrating and detect, is specifically related to a kind of detection wiring for punching current transformer and puts.
Background technology
Size of current most diverse in the circuit of generating, power transformation, transmission of electricity, distribution and electricity consumption; have from a few peace to a few kilo-ampere; for the ease of measuring, protect and controlling; need to be converted to more unified electric current; if it is breakneck that the high voltage in addition on circuit is directly measured; by punching current transformer, current transformation and electrical isolation effect can be played.
Punching current transformer is according to electromagnetic induction principle, is made up of, has first side winding and secondary side winding the iron core closed and winding; the first side winding number of turn is little; be serially connected in tested current circuit, secondary side winding turn ratio is more, is serially connected in measurement instrument and protective loop.Current transformer is by the turn ratio of first side winding and secondary side winding, according to electromagnetic induction principle, the high electric current flowing through first side winding is converted to the low current of secondary side winding, so that measurement instrument reads secondary side low current, change out the numerical value of high electric current according to above-mentioned turn ratio.
Punching current transformer is widely used in generating plant and transformer station's metering, detection and route protection.Before punching current transformer puts into operation, and in certain life cycle, regular inspection test is carried out to guarantee that punching current transformer normally works to punching current transformer, often will carry out a flow-through test.This test to punching current transformer has two kinds of once through-flow test methods.First kind of way is direct logical big current in a flow-through test, for the punching current transformer of 100/5 specification, then once needs the big current by 100 peaces in through-flow experiment.Now, carry out a flow-through test according to independent generator, Large Copacity current feedback circuit, not only required testing equipment is bulky, and the working environment of testing ground can not set up main equipment at any time, and experimentation cost significantly increases.The second way is the number of turn increasing primary side solderless wrapped connection iron ring, but adopt the words of multiturn coil, need at primary side solderless wrapped connection wire repeatedly before each test, when the primary current variation range of through-flow test is larger, need in test way to change the primary side solderless wrapped connection number of turn, dismounting cable so repeatedly reduces work efficiency.
Summary of the invention
The object of the invention is to for above-mentioned problems of the prior art, a kind of primary side termination is proposed, make punching current transformer carry out a flow-through test without the need to independent generator, Large Copacity current feedback circuit, and only need primary connection in test process.
For reaching the object of foregoing invention, the present invention is achieved through the following technical solutions:
A kind of detection termination for punching current transformer, it is characterized in that: comprise cable no-load voltage ratio regulator, the end of incoming cables of external cable and external measuring current and leading-out terminal, described cable no-load voltage ratio regulator comprises universal switch and coil forms circuit, described coil forms circuit and has the first outside line incoming end, second outside line incoming end and the wire group be electrically connected with two outside line incoming ends, the two ends of described external cable are and above-mentioned first, first pluggable connector of the second outside line incoming end coupling grafting and the second pluggable connector, described external cable two ends and coil form circuit and are electrically connected with dislocation form and are formed solenoid, circuit is formed with the wire of gating external cable access number by universal switch one side ports connecting coil, universal switch opposite side port also connects rear as end of incoming cables.
The dislocation type of attachment that described external cable and coil form circuit has the following two kinds:
The first, first and second pluggable connector described and first and second outside line incoming end are the plug of same number P IN position, the 2nd PIN position of direct-connected second outside line incoming end is to most end PIN position successively from a PIN position of the first outside line incoming end to PIN position second from the bottom for described wire group, and a PIN position of described second outside line incoming end is electrically connected leading-out terminal; Described external cable is electrically connected a PIN position of the second pluggable connector to most end PIN position by cable inside conductor successively from the first pluggable connector the one PIN position to most end PIN position; First pluggable connector and the first outside line incoming end and the second pluggable connector and the second outside line incoming end all plug together with identical PIN position order.
The second, first and second pluggable connector described and first and second outside line incoming end are the plug of same number P IN position, described external cable is electrically connected a PIN position of the second pluggable connector to PIN position second from the bottom by cable inside conductor successively from the 2nd PIN position to the most end PIN position of the first pluggable connector, and a first pluggable PIN position is electrically connected the most end PIN position of the second pluggable connector; 2nd PIN position to the most end PIN position of the first outside line incoming end of described wire group is corresponding in turn to the 2nd PIN position of electric connection second outside line incoming end to most end PIN position, and a PIN position electrical connection leading-out terminal of the second outside line incoming end; First pluggable connector and the first outside line incoming end and the second pluggable connector and the second outside line incoming end all plug together with identical PIN position order.
Described universal switch is 2 road gating switches or is 3 road gating switches or is 4 road gating switches or the gating switch for more large route number, first port and other bit ports of gating switch homonymy are connected the PIN position of the first outside line incoming end respective number successively, the port of opposite side also connects rear connection end of incoming cables, and total gear number then should be 2 grades, 3 grades, 4 grades or more gears relatively.
For the first dislocation connected mode, corresponding universal switch is 3 road gating switches, comprise port s-1, s-2, s-3, s-4, s-5 and s-6, its middle port s-1, s-2 and s-3 are connected the a-1 position of the first outside line incoming end, a-10 position and a-20 position respectively, port s-4, s-5 are connected end of incoming cables with after s-6 parallel connection, and total gear number is then 3 grades.
For the second dislocation connected mode, corresponding universal switch is 3 road gating switches, comprise port s-1, s-2, s-3, s-4, s-5 and s-6, its middle port s-1, s-2 and s-3 are connected the a-2 position of the first outside line incoming end, a-10 position and a-1 position respectively, port s-4, s-5 are connected end of incoming cables with after s-6 parallel connection, and total gear number is then 3 grades.
Two PIN positions of the first outside line incoming end are connected successively by least two ports of universal switch, thus can select by external switch the number of turn needing switch-on coil, when testing inductor in real work, when running into adjustment primary side current, more emat coil need not be disconnected, only need select switch thus the size realizing measuring current is selected.
Above-mentioned external cable includes the copper cash of 20 or 30 or other radicals, and the first outside line incoming end is relative with the copper cash number of external cable with the second outside line incoming end should be 20PIN position or 30PIN position or the plug for other PIN positions.
The first above-mentioned outside line incoming end and the earthing of casing of the second outside line incoming end.
Compared with prior art, tool of the present invention has the following advantages:
A kind of detection termination for punching current transformer of the present invention, on the basis of primary side solderless wrapped connection cable, lead-in cable no-load voltage ratio regulating box in the cable, realize the first siding ring ratio that third gear regulates solderless wrapped connection current inductor, thus meet in a flow-through test without the need to independent generator, Large Copacity current feedback circuit, and in process, only need the requirement of primary connection, there is increasing work efficiency and reduce the advantage of testing cost.
Accompanying drawing explanation
Fig. 1 is the integrated circuit figure of a kind of detection termination embodiment 1 for punching current transformer of the present invention.
Fig. 2 is the exterior cable structure figure of a kind of detection termination embodiment 1 for punching current transformer of the present invention.
Fig. 3 is the cable no-load voltage ratio regulating box circuit diagram of a kind of detection termination embodiment 1 for punching current transformer of the present invention.
Fig. 4 a is the enlarged diagram of the first outside line incoming end of the cable no-load voltage ratio regulating box of Fig. 3.
Fig. 4 b is the enlarged diagram of the second outside line incoming end of the cable no-load voltage ratio regulating box of Fig. 3.
Fig. 5 is the wiring schematic diagram of the universal switch of the cable no-load voltage ratio regulating box of Fig. 3.
Fig. 6 is the integrated circuit figure of a kind of detection termination embodiment 2 for punching current transformer of the present invention.
Fig. 7 is the exterior cable structure figure of a kind of detection termination embodiment 2 for punching current transformer of the present invention.
Fig. 8 is the cable no-load voltage ratio regulating box circuit diagram of a kind of detection termination embodiment 2 for punching current transformer of the present invention.
Embodiment
Be clearly and completely described the technical scheme in the embodiment of the present invention below in conjunction with drawings and Examples, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.
Embodiment 1
Refer to Fig. 1, the embodiment 1 of a kind of detection termination for punching current transformer of the present invention, this termination is the wire loop that cable no-load voltage ratio regulating box 1 is formed with external cable 2, there is stranded conductor external cable 2 inside, these wires, by after the connection of cable no-load voltage ratio regulating box 1 internal circuit, form the coil having multiturn and be wound around.
Please composition graphs 2 and Fig. 3 further, be convenient to clearlyer understand the concrete structure of the present embodiment and electrical principle.
The two ends of described external cable 2 are respectively arrange one first pluggable connector 21 and the second pluggable connector 22.Copper cash number in this external cable 2 can be 20 or 30 or be other radicals.In the present embodiment, external cable 2 selects that 20 maximum carrying capacities are 20A, cross-sectional area is 2.5mm
2copper cash, this external cable 2 is not limited to above-mentioned 20 copper cash, according to application needs, the copper cash of more or less radical can be adopted.Above-mentioned first pluggable attachment plug 21, the corresponding copper cash number of second pluggable attachment plug 22, adopt the parent form connector of 20PIN position, define each PIN position of the pluggable attachment plug 22 of the first pluggable connector 21/ second from top to bottom (with scheme up and down for reference) be followed successively by A-1/B-1 to A-20/B-20, copper cash in said external cable 2 successively two ends directly connects the first pluggable connector 21, the PIN position of the same order of the second pluggable attachment plug 22, above-mentioned first pluggable connector 21, second pluggable attachment plug 22 also can be male connector, and be not limited to 20PIN position, the pluggable connector of corresponding PIN figure place is adopted according to the copper cash number in external cable 2.
Described cable no-load voltage ratio regulating box 1 forms circuit 12 by universal switch 11 and coil and forms, and cable no-load voltage ratio regulating box 1 also has the end of incoming cables 13 and leading-out terminal 14 that supply measuring current inflow and outflow, and measuring current flows into from this end of incoming cables 13, flows out from leading-out terminal 14.
Coil described in the present embodiment forms circuit 12 and comprises the first outside line incoming end 121, second outside line incoming end 122 and wire group 123, the pluggable connector that in the present embodiment, above-mentioned first outside line incoming end 121 and the second outside line incoming end 122 adopt, can match with the PIN bits number of the pluggable attachment plug 22 of the pluggable connector of first of external cable 2 21, second and can supporting grafting.
The 2nd PIN position of direct-connected second outside line incoming end 122 is to most end PIN position successively from a PIN position of the first outside line incoming end 121 to PIN position second from the bottom for described wire group 123, and the most end PIN position of described second outside line incoming end 122 is connected with leading-out terminal 14.In this mode connected that misplaces, when being connected to form loop with external cable 2, the inner lead dislocation that can realize cable connects and forms the coil having multiturn and be wound around.
Adopt the connector of 20PIN position in the present embodiment, the enlarged diagram of the first outside line incoming end 121 and the second outside line incoming end 122 is respectively referring to Fig. 4 a and Fig. 4 b, each PIN position of the first outside line incoming end 121 and the second outside line incoming end 122 from top to bottom (with scheme up and down for reference) be followed successively by a-1/b1 to a-20/b20, described wire group 123 is the one group of wire adopting dislocation connected mode to connect the first outside line incoming end 121 and the second outside line incoming end 122, concrete, wire group 123 directly connects b-2 position from a-1 position, a-2 position directly connects b-3 position, the like, last a-19 position directly connects b-20 position.The b-1 position of the second outside line incoming end 122 connects leading-out terminal 14.Meanwhile, the shell of the first outside line incoming end 121 and the second outside line incoming end 122 ground connection simultaneously.
Described universal switch 11 is 2 road gating switches or is 3 road gating switches or is 4 road gating switches or the gating switch for more large route number, first port of gating switch homonymy is connected first PIN position of the first outside line incoming end 121 and the PIN position of other needs access with other bit ports, total gear number then should be 2 grades, 3 grades, 4 grades or more gears relatively.The universal switch 11 that the present embodiment adopts is three road gating switches, comprise port s-1, s-2, s-3, s-4, s-5, s-6, its middle port s-1, s-2 and s-3 are connected the a-1 position of the first outside line incoming end 121 respectively, a-10 position and a-20 position, port s-4, s-5 are connected end of incoming cables 13 with after s-6 parallel connection.By the connection of above-mentioned port, the third gear that can realize coil turn regulates, and is X1, X10, X20 successively, i.e. 1 circle, 10 circles and 20 circles.Above-mentioned universal switch 11 is not limited to three road gating switches, can be two roads or the gating switch more than three tunnels, and accordingly, this universal switch 11 can realize the regulatory function of less or more the gear number of coil turn.
The pluggable connector 22 of the first outside line incoming end 121, second that first pluggable connector 21 of above-mentioned external cable 2 connects no-load voltage ratio regulating box connects the second outside line incoming end 122, and above-mentioned connection needs corresponding PIN position order.
Embodiment 2
Refer to Fig. 6, the embodiment 2 of a kind of detection termination for punching current transformer of the present invention, the building block of the termination of this embodiment is identical with embodiment 1, it is all the wire loop be made up of cable no-load voltage ratio regulating box 1 and external cable 2, there is stranded conductor external cable 2 inside, these wires, by after the connection of cable no-load voltage ratio regulating box 1 internal circuit, form the coil having multiturn and be wound around.
The place different from embodiment 1, is that circuit is different from the annexation of port, concrete with reference to Fig. 7 and Fig. 8.
It is the external cable 2 of the present embodiment 2 shown in Fig. 7, the PIN position B-1 to B-19 of the second pluggable attachment plug 22 of this external cable 2 is successively by the wire in cable, be electrically connected the PIN position A-2 to A-20 of the first pluggable connector 21, and PIN position B-20 is electrically connected with PIN position A-1.
Be the cable no-load voltage ratio regulating box 1 of the present embodiment 2 shown in Fig. 8, the PIN position a-2 to a-20 of the first outside line incoming end 121 of this cable no-load voltage ratio regulating box is electrically connected by wire group 123 successively with the PIN position b-2 to b-20 of the second outside line incoming end 122 successively.The S-1 end of universal switch 11, S-2 hold and S-3 end is electrically connected with PIN position a-2, a-10 and a-1 of the first outside line incoming end 121 successively.
The embodiment 2 of a kind of detection termination for punching current transformer of the present invention is except said structure is different from embodiment 1, and other structure is identical.
This functional realiey embodiment 1 being used for the detection termination of punching current transformer is illustrated for example, and the operation of embodiment 2 is consistent with embodiment 1 and omit.Operate as follows: after punching current transformer to be tested is enclosed in external cable 2 punching solderless wrapped connection one, introduce measuring current.This measuring current is connected in parallel to the first outside line incoming end 121 from end of incoming cables 13 through universal switch 11 tap, when universal switch 11 modulates X1 shelves, the a-1 position of end of incoming cables 13 and the first outside line incoming end 121 is connected, electric current flows back to leading-out terminal 14 after external cable 2 solderless wrapped connection punching current transformer 1 circle, and now the electric current of a flow-through test is identical with inlet wire current; When universal switch 11 modulates X10 shelves, the a-10 position of end of incoming cables 13 and the first outside line incoming end 121 is connected, and electric current flows back to leading-out terminal 14 after external cable 2 solderless wrapped connection punching current transformer 10 circle, and now the primary current of a flow-through test is inlet wire current 10 times; When universal switch 11 is adjusted to X20 shelves, the a-20 position of end of incoming cables 13 and the first outside line incoming end 121 is connected, and electric current flows back to and occurs end 14 after external cable 2 solderless wrapped connection punching current transformer 20 circle, and now the primary current of a flow-through test is inlet wire current 20 times.Selected by the gear of above-mentioned universal switch 11, thus realize the adjustment of inlet wire current being amplified to no-load voltage ratio.
By a kind of detection termination for punching current transformer of the present invention, be applied in the coil solderless wrapped connection of punching current transformer primary side, cable no-load voltage ratio regulating box 1 forms the dislocation connected mode of circuit 12 by coil and the bit selecting of universal switch 11 passes into electric current, thus realize the function that third gear regulates inlet wire current multiplying power, midway just can realize the function of Current amplifier no-load voltage ratio without the need to repeatedly disconnecting cable, eliminate bulky current feedback circuit simultaneously, effectively reduce the cost of a flow-through test.
Above-described embodiment only in order to the present invention is described and and unrestricted technical scheme described in the invention; Therefore, although this instructions with reference to each above-mentioned embodiment to present invention has been detailed description, those of ordinary skill in the art should be appreciated that and still can modify to the present invention or equivalent to replace; And all do not depart from technical scheme and the improvement thereof of the spirit and scope of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (8)
1. the detection termination for punching current transformer, it is characterized in that: comprise cable no-load voltage ratio regulator, the end of incoming cables of external cable and external measuring current and leading-out terminal, described cable no-load voltage ratio regulator comprises universal switch and coil forms circuit, described coil forms circuit and has the first outside line incoming end, second outside line incoming end and the wire group be electrically connected with two outside line incoming ends, the two ends of described external cable are and above-mentioned first, first pluggable connector of the second outside line incoming end coupling grafting and the second pluggable connector, described external cable two ends and coil form circuit and are electrically connected with dislocation form and are formed solenoid, circuit is formed with the wire of gating external cable access number by universal switch one side ports connecting coil, universal switch opposite side port also connects rear as end of incoming cables.
2. a kind of detection termination for punching current transformer according to claim 1, it is characterized in that: the dislocation type of attachment that described external cable and coil form circuit is as follows: first and second pluggable connector described and first and second outside line incoming end are the plug of same number P IN position, the 2nd PIN position of direct-connected second outside line incoming end is to most end PIN position successively from a PIN position of the first outside line incoming end to PIN position second from the bottom for described wire group, and a PIN position of described second outside line incoming end is electrically connected leading-out terminal; Described external cable is electrically connected a PIN position of the second pluggable connector to most end PIN position by cable inside conductor successively from the first pluggable connector the one PIN position to most end PIN position; First pluggable connector and the first outside line incoming end and the second pluggable connector and the second outside line incoming end all plug together with identical PIN position order.
3. a kind of detection termination for punching current transformer according to claim 1, it is characterized in that: the dislocation type of attachment that described external cable and coil form circuit is as follows: described first, two pluggable connectors and first, two outside line incoming ends are the plug of same number P IN position, described external cable is electrically connected a PIN position of the second pluggable connector to PIN position second from the bottom by cable inside conductor successively from the 2nd PIN position to the most end PIN position of the first pluggable connector, a first pluggable PIN position is electrically connected the most end PIN position of the second pluggable connector, 2nd PIN position to the most end PIN position of the first outside line incoming end of described wire group is corresponding in turn to the 2nd PIN position of electric connection second outside line incoming end to most end PIN position, and a PIN position electrical connection leading-out terminal of the second outside line incoming end, first pluggable connector and the first outside line incoming end and the second pluggable connector and the second outside line incoming end all plug together with identical PIN position order.
4. a kind of detection termination for punching current transformer according to claim 1 or 2 or 3, it is characterized in that: described universal switch is 2 road gating switches or is 3 road gating switches or is 4 road gating switches or the gating switch for more large route number, first port and other bit ports of gating switch homonymy are connected the PIN position of the first outside line incoming end respective number successively, the port of opposite side also connects rear connection end of incoming cables, and total gear number then should be 2 grades, 3 grades, 4 grades or more gears relatively.
5. a kind of detection termination for punching current transformer according to claim 1 and 2, it is characterized in that: described universal switch is 3 road gating switches, comprise port s-1, s-2, s-3, s-4, s-5 and s-6, its middle port s-1, s-2 and s-3 are connected the a-1 position of the first outside line incoming end, a-10 position and a-20 position respectively, port s-4, s-5 are connected end of incoming cables with after s-6 parallel connection, and total gear number is then 3 grades.
6. a kind of detection termination for punching current transformer according to claim 1 or 3, it is characterized in that: described universal switch is 3 road gating switches, comprise port s-1, s-2, s-3, s-4, s-5 and s-6, its middle port s-1, s-2 and s-3 are connected the a-2 position of the first outside line incoming end, a-10 position and a-1 position respectively, port s-4, s-5 are connected end of incoming cables with after s-6 parallel connection, and total gear number is then 3 grades.
7. a kind of detection termination for punching current transformer according to claims 1 to 3 any one, it is characterized in that: described external cable includes the copper cash of 20 or 30 or other radicals, the first outside line incoming end is relative with the copper cash number of external cable with the second outside line incoming end should be 20PIN position or 30PIN position or the plug for other PIN positions.
8. a kind of detection termination for punching current transformer as claimed in any of claims 1 to 3, is characterized in that: the earthing of casing of described first outside line incoming end and the second outside line incoming end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410445834.3A CN104237835A (en) | 2014-09-03 | 2014-09-03 | Wiring detection device for straight-through current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410445834.3A CN104237835A (en) | 2014-09-03 | 2014-09-03 | Wiring detection device for straight-through current transformer |
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| CN104237835A true CN104237835A (en) | 2014-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410445834.3A Pending CN104237835A (en) | 2014-09-03 | 2014-09-03 | Wiring detection device for straight-through current transformer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546941A (en) * | 2016-12-08 | 2017-03-29 | 国网北京市电力公司 | Termination and the pilot system with which |
| CN107450037A (en) * | 2017-06-28 | 2017-12-08 | 河南平高通用电气有限公司 | A kind of transformer iron core excitation characteristic measuring device and its measurement frock |
| CN109375135A (en) * | 2018-10-25 | 2019-02-22 | 国网天津市电力公司电力科学研究院 | Manually adjust the bracket in straight-through current transformer aperture |
| CN112763965A (en) * | 2020-12-11 | 2021-05-07 | 深圳供电局有限公司 | Comprehensive test device of current transformer |
-
2014
- 2014-09-03 CN CN201410445834.3A patent/CN104237835A/en active Pending
Non-Patent Citations (1)
| Title |
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| 王献春: "电力互感器综合特性测试仪的研制开发", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546941A (en) * | 2016-12-08 | 2017-03-29 | 国网北京市电力公司 | Termination and the pilot system with which |
| CN107450037A (en) * | 2017-06-28 | 2017-12-08 | 河南平高通用电气有限公司 | A kind of transformer iron core excitation characteristic measuring device and its measurement frock |
| CN109375135A (en) * | 2018-10-25 | 2019-02-22 | 国网天津市电力公司电力科学研究院 | Manually adjust the bracket in straight-through current transformer aperture |
| CN112763965A (en) * | 2020-12-11 | 2021-05-07 | 深圳供电局有限公司 | Comprehensive test device of current transformer |
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