CN202522611U - Direct-current leakage current sensor - Google Patents
Direct-current leakage current sensor Download PDFInfo
- Publication number
- CN202522611U CN202522611U CN2012200706514U CN201220070651U CN202522611U CN 202522611 U CN202522611 U CN 202522611U CN 2012200706514 U CN2012200706514 U CN 2012200706514U CN 201220070651 U CN201220070651 U CN 201220070651U CN 202522611 U CN202522611 U CN 202522611U
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- current sensor
- leakage current
- coil
- contact pin
- socket
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Abstract
The utility model relates to the technology field of a current sensor and discloses a direct-current leakage current sensor. The direct-current leakage current sensor comprises an annular shell, a magnet ring which is placed in the shell and can be passed through by a line whose external part needs to be detected, a coil wound on the magnet ring and a detection circuit board which can receive a signal transmitted by the coil and can be electrically connected to an external control center. The detection circuit board is electrically connected to the coil through a flexibly inserted mode. The detection circuit board in an embodiment is electrically connected to the coil through the flexibly inserted mode. In this way, when a fault appears in the detection circuit board, operation personnel can directly disassemble the detection circuit board from the coil so as to carry out maintenance. After the maintenance is finished, the detection circuit board can be directly installed on the coil again. During a whole process, an external direct current control system does not need to be power off. Losses are avoided and the maintenance is convenient. Even if there is the fault, the direct-current leakage current sensor can be maintained and be reused so that the cost is reduced.
Description
Technical field
The utility model relates to the technical field of current sensor, relates in particular to the DC leakage current sensor.
Background technology
Using departments such as the electric power of DC control system, chemical industry, telecommunications, railway, very strict when the safe operation of DC power system is required, if 2 ground connection are simultaneously taken place, then possibly cause some maloperations of said apparatus, cause the accident.
In the prior art, the DC leakage current sensor generally all comprises annular outer cover, is placed on magnet ring, coil and the testing circuit plate of winding on this magnet ring in the annular outer cover, and the circuit that outside need detects passes magnet ring; When fault such as earth leakage appearred in the circuit that detects when needs, changing will appear in the electric current that flows through in the circuit, thereby coil carries signal then can for the testing circuit plate; And then the testing circuit plate is handled signal; Judge the problem that circuit occurs, and signal is passed to the external control center, certainly; When fault such as earth leakage not occurring when circuit, coil transmits signal then can not for the testing circuit plate.
In the direct current electricity leakage sensor in above-mentioned, magnet ring, coil and testing circuit are packaged together, like this; When this sensor broke down, when particularly the testing circuit plate broke down, the maintenance personal must be cut off the power supply DC control system; Again sensor is disassembled and keep in repair; Like this, cause the paralysis of whole DC control system, it is beyond measure that its loss is worth; In addition, because testing circuit plate, coil and magnet ring are packaged together, its maintenance is trouble quite, generally speaking, all is the sensor that directly more renews at DC control system, like this, increases cost.
The utility model content
The purpose of the utility model is to provide the DC leakage current sensor, is intended to solve the problem that DC leakage current sensor maintenance of the prior art bothers, cost is high.
The utility model is to realize like this; The DC leakage current sensor; Comprise annular outer cover, place in the said shell and can supply magnet ring that the outside circuit that needs to detect passes, be wound in the coil on the said magnet ring and can accept the signal of said coil transmission and can be electrically connected at the testing circuit plate at external control center, said testing circuit plate is electrically connected at said coil through the activity mode of plugging.
Further, said coil the end of a thread is provided with socket member or contact pin member, the corresponding contact pin member or the socket member that can cooperate and electrically connect with said socket member that be provided with on the said circuit board.
Further, said socket member comprises socket body and the socket of being located at said socket body, the contact pin that said contact pin member comprises the contact pin body and is located at said contact pin body and can cooperates with said socket.
Further, said testing circuit plate also is provided with the connecting elements that can electrically connect with the external control center, and said connecting elements is revealed in outside the said shell.
Further, said shell lower end be provided with can with the fixed sturcture of outside appurtenances matching and fixing.
Further, said fixed sturcture is the guide rail structure that can cooperate with the outer rail activity.
Further, but said guide rail structure comprises is located at several elastomer block that both sides, said shell lower end and elasticity press on outer rail relatively.
Perhaps, said fixed sturcture be can with the Screw hole structure of external fastening matching and fixing in outside appurtenances.
Further, has the screw that can cooperate in the said Screw hole structure with external fastening.
Compared with prior art, the testing circuit plate in the DC leakage current sensor in the present embodiment is to be electrically connected on the coil, like this through the mode that activity plugs; When the testing circuit plate broke down, operating personnel can directly disassemble the testing circuit plate and keep in repair from coil, after maintenance is good; Directly reinstall up, whole process need not have a power failure to the DC control system of outside; Avoid loss, and easy to maintenance, even be out of order; The DC leakage current sensor also can keep in repair and utilize, and reduces cost.
Description of drawings
The main synoptic diagram of looking in the inside of the DC leakage current sensor that Fig. 1 provides for the utility model embodiment one;
The work synoptic diagram of the DC leakage current sensor that Fig. 2 provides for the utility model embodiment one;
The front view of the DC leakage current sensor that Fig. 3 provides for the utility model embodiment one;
Synoptic diagram is looked on the left side of the DC leakage current sensor that Fig. 4 provides for the utility model embodiment one;
The master of the DC leakage current sensor that Fig. 5 provides for the utility model embodiment two looks synoptic diagram;
The schematic rear view of the DC leakage current sensor that Fig. 6 provides for the utility model embodiment two;
The schematic top plan view of the DC leakage current sensor that Fig. 7 provides for the utility model embodiment two.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The utility model provides the DC leakage current sensor; Comprise annular outer cover, place in the said shell and can supply magnet ring that the outside circuit that needs to detect passes, be wound in the coil on the said magnet ring and can accept the signal of said coil transmission and can be electrically connected at the testing circuit plate at external control center, said testing circuit plate is electrically connected at said coil through the activity mode of plugging.
DC leakage current sensor in the utility model is easy to maintenance, and cost is low.
Below in conjunction with concrete accompanying drawing detailed description is carried out in the realization of the utility model.
Embodiment one
Shown in Fig. 1～4, a preferred embodiment that provides for the utility model.
DC leakage current sensor 1 in the present embodiment is widely used in the DC control system, whether the main line in the DC control system earth leakage occurred detect, but it comprises annular outer cover 10, is placed on magnet ring 11 in this shell 10, is wrapped in coil 12 and the testing circuit plate 14 of receiving coil 12 signals on the magnet ring 11; Shell 10 is shape ringwise, wherein is provided with the ring cavity that is used to place magnet ring 11, certainly; Also be formed with first through hole 101 in this shell 10; This first through hole 101 runs through shell 10 front and back ends, and magnet ring 11 is placed in the ring cavity of shell 10, and also has second through hole in the magnet ring 11; Like this; The circuit that outside need detects passes first through hole 101 of shell 10, simultaneously, has also passed second through hole of magnet ring 11; Coil 12 is wrapped on the magnet ring 11, and is electrically connected on the testing circuit plate 14, like this, and when the electric current on the outside line that passes magnet ring 11 changes; Signal will occur on the coil 12, this signal can pass to testing circuit plate 14, behind testing circuit plate 14 acknowledge(ment) signals; Signal is handled, and passed to outside control center 2, certainly; Testing circuit plate 14 in above-mentioned not only electrically connects coil 12, and it can electrically connect the transmission of realization signal with the control center 2 of outside.
The principle of work of the DC leakage current sensor 1 in above-mentioned is following: magnet ring 11 is passed on the positive circuit and the negative wire road of the circuit that outside need detects respectively; When this line work normal; When faults such as earth leakage not occurring; Because the size of current in the flows through sensor 1 is equal, and is in the opposite direction, so the signal of coil 12 outputs is zero; Certainly, when fault such as earth leakage occurring when circuit, changing will appear in the electric current in the flows through sensor 1; Difference stream just appears; Like this, the signal of coil 12 outputs is just non-vanishing, and testing circuit plate 14 receiving coils 12 transmit the signal of coming; Signal is handled, and passed to outside control center 2.
Certainly, owing to may break down among working in the sensor 1, for example; Testing circuit plate 14 breaks down, and for the ease of this sensor 1 is keeped in repair, the testing circuit plate 14 in the present embodiment is to be electrically connected at the end of a thread on the coil 12 through the movable mode of plugging; Here " movable plugging " refers to, and testing circuit plate 14 can plug with coil 12 and realize electrically connecting, certainly; When needs keep in repair testing circuit plate 14; Then can directly testing circuit plate 14 and coil 12 be removed the relation that plugs, thereby, electrical connection removed between testing circuit plate 14 and the coil 12.
Electrically connect through the mode of plugging between testing circuit plate 14 in above-mentioned and the coil 12, like this, when sensor 1 breaks down; Can not need DC control system be had a power failure; As long as directly with testing circuit plate 14 from coil 12 disassemble then can, after maintenance is good, then directly testing circuit plate 14 is plugged on the coil 12 again; Realize electrically connecting and then can; Be convenient to the maintenance of operating personnel to this DC leakage current sensor 1, and this DC leakage current sensor 1 can keep in repair and to utilize, cost is lower.
Particularly, coil 12 is wrapped on the magnet ring 11, and coil 12 terminations are provided with socket member 13; That is to say that coil 12 is electrically connected on this socket member 13, accordingly; Testing circuit plate 14 is provided with and can cooperates the contact pin member that electrically connects with this socket member 13, and this contact pin member electric connection testing circuit plate 14, like this; Through the cooperation of socket member 13 and contact pin member, realize that testing circuit plate 14 and coil 12 plug electric connection.
Certainly, also can be that the termination of coil 12 is provided with the contact pin member, accordingly, be provided with socket member 13 at testing circuit plate 14, concrete design is decided by actual conditions.
Generally speaking, socket member 13 is provided with four sockets, is respectively applied for the both positive and negative polarity of connection power supply and the two ends of coil 12, certainly, accordingly, then is provided with four contact pins on the contact pin member.
Certainly, in order to electrically connect, also be provided with the connecting elements that can electrically connect with external control center 2 on the testing circuit in above-mentioned with external control center 2; This connecting elements is emerging in outside the shell 10; Like this, through this connecting elements, realize that testing circuit plate 14 and external control center 2 electrically connect.
Connecting elements in above-mentioned can be a various ways, for example, socket form or contact pin form in above-mentioned, it is concrete to be provided with and to look the design at external control center 2 and decide.
Direct current electricity leakage sensor 1 generally is that device is in the switch cabinet of DC control system in the present embodiment; Like this; For fixing DC leakage current sensor 1; The lower end of the shell 10 of the DC leakage current sensor 1 in the present embodiment has fixed sturcture 102, utilizes this fixed sturcture 102, this DC leakage current sensor 1 can with the accessory matching and fixing of outside.
Particularly; After DC leakage current sensor 1 is fixed, sometimes, change for the ease of position to DC leakage current sensor 1; Fixed sturcture 102 in the present embodiment is the guide rail structure that can cooperate with the outer rail activity; Here " the movable cooperation " refers to: DC leakage current sensor 1 can be fixed on the outside guide rail, certainly, also can on guide rail, move.
Above-mentioned middle guide structure comprises the elastomer block that is oppositely arranged on shell 10 both sides, has the space that can be used for placing guide rail between the relative elastomer block, like this; When DC leakage current sensor 1 was placed on the guide rail, relative elastomer block can be pressed on the both sides of guide rail, thereby; Realize that DC leakage current sensor 1 is fixed on the guide rail, certainly, because elastomer block has elasticity; Thereby DC leakage current sensor 1 also can move on guide rail.
Described coil 12 in the present embodiment can be a tickler, also can be the coil that possesses other form function, specifically can depend on actual need and decides, and is not limited to present embodiment.
Embodiment two
Shown in Fig. 5～7, another preferred embodiment that provides for the utility model.
The difference of present embodiment and embodiment one is: the fixed sturcture 102 of present embodiment is for being arranged on shell 10 bottom Screw hole structures, and this Screw hole structure can cooperate with the securing member of outside, thereby realizes that DC leakage current sensor 1 is fixed on the outside appurtenances.
Certainly, have the screw 1021 that can cooperate with external fastening in screw 1021 structures, in addition, securing member can be screw or bolt etc.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection domain of the utility model.
Claims (9)
1. DC leakage current sensor; Comprise annular outer cover, place in the said shell and can supply magnet ring that the outside circuit that needs to detect passes, be wound in the coil on the said magnet ring and can accept the signal of said coil transmission and can be electrically connected at the testing circuit plate at external control center; It is characterized in that said testing circuit plate is electrically connected at said coil through the activity mode of plugging.
2. DC leakage current sensor as claimed in claim 1 is characterized in that, said coil the end of a thread is provided with socket member or contact pin member, the corresponding contact pin member or the socket member that can cooperate and electrically connect with said socket member that be provided with on the said circuit board.
3. DC leakage current sensor as claimed in claim 2; It is characterized in that; Said socket member comprises socket body and the socket of being located at said socket body, the contact pin that said contact pin member comprises the contact pin body and is located at said contact pin body and can cooperates with said socket.
4. DC leakage current sensor as claimed in claim 1 is characterized in that, said testing circuit plate also is provided with the connecting elements that can electrically connect with the external control center, and said connecting elements is revealed in outside the said shell.
5. DC leakage current sensor as claimed in claim 1 is characterized in that, said shell lower end be provided with can with the fixed sturcture of outside appurtenances matching and fixing.
6. like each described DC leakage current sensor of claim 1 to 5, it is characterized in that said fixed sturcture is the guide rail structure that can cooperate with the outer rail activity.
7. DC leakage current sensor as claimed in claim 6 is characterized in that, is located at several elastomer block that both sides, said shell lower end and elasticity press on outer rail relatively but said guide rail structure comprises.
8. DC leakage current sensor as claimed in claim 6 is characterized in that, said fixed sturcture be can with the Screw hole structure of external fastening matching and fixing in outside appurtenances.
9. DC leakage current sensor as claimed in claim 8 is characterized in that, has the screw that can cooperate with external fastening in the said Screw hole structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200706514U CN202522611U (en) | 2012-02-29 | 2012-02-29 | Direct-current leakage current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200706514U CN202522611U (en) | 2012-02-29 | 2012-02-29 | Direct-current leakage current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202522611U true CN202522611U (en) | 2012-11-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200706514U Expired - Fee Related CN202522611U (en) | 2012-02-29 | 2012-02-29 | Direct-current leakage current sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202522611U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614627A (en) * | 2014-12-21 | 2015-05-13 | 深圳市柏特瑞电子有限公司 | Portable DC leakage detection positioning device and detection positioning method |
| CN105403749A (en) * | 2015-07-03 | 2016-03-16 | 宁波星成电子有限公司 | Differential leakage current sensor |
| CN106404044A (en) * | 2015-07-30 | 2017-02-15 | 安徽圣享智能科技有限公司 | Leakage current and temperature detecting device for electric energy meter measuring box |
| WO2018165970A1 (en) * | 2017-03-17 | 2018-09-20 | 浙江巨磁智能技术有限公司 | Leakage current sensor, and apparatus for monitoring leakage current |
-
2012
- 2012-02-29 CN CN2012200706514U patent/CN202522611U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614627A (en) * | 2014-12-21 | 2015-05-13 | 深圳市柏特瑞电子有限公司 | Portable DC leakage detection positioning device and detection positioning method |
| CN105403749A (en) * | 2015-07-03 | 2016-03-16 | 宁波星成电子有限公司 | Differential leakage current sensor |
| CN106404044A (en) * | 2015-07-30 | 2017-02-15 | 安徽圣享智能科技有限公司 | Leakage current and temperature detecting device for electric energy meter measuring box |
| WO2018165970A1 (en) * | 2017-03-17 | 2018-09-20 | 浙江巨磁智能技术有限公司 | Leakage current sensor, and apparatus for monitoring leakage current |
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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: 20121107 Termination date: 20170229 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |