CN202676838U - Novel direct current leakage current sensor - Google Patents
Novel direct current leakage current sensor Download PDFInfo
- Publication number
- CN202676838U CN202676838U CN 201220209803 CN201220209803U CN202676838U CN 202676838 U CN202676838 U CN 202676838U CN 201220209803 CN201220209803 CN 201220209803 CN 201220209803 U CN201220209803 U CN 201220209803U CN 202676838 U CN202676838 U CN 202676838U
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- China
- Prior art keywords
- box body
- sensor
- induction box
- line
- leakage current
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Abstract
The utility model discloses a novel direct current leakage current sensor. The sensor comprises: an induction box body with a direct current feed line inlet and a direct current feed line outlet, wherein the induction box contains an induction coil inside, the line inlet is communicated with the line outlet and the channel perforates the induction coil. Furthermore, the sensor comprises a sensor shell. The sensor shell is also provided with a clamping structure suitable for being mounted on various metal guide rails. By using the sensor, the monitored direct current feed line inlet and outlet are arranged, thus the monitored direct current enters into the induction box body from the line inlet, and passes through the induction coil inside and then leaves away from the induction box body through the line outlet. Because the sensor itself has the function of the connection terminal, and is provided with the clamping structure suitable for being mounted on the various metal guide rails, compared with the traditional sensor, the secondary terminal is not needed and furthermore the direct current feed line circuit is simplified, the cost is reduced, and the installation process is convenient and quick.
Description
Technical field
The utility model relates to sensor technology, particularly relates to the DC leakage current sensor.
Background technology
The DC leakage current installation of sensors when the device operation, detects the poor stream signal of each feed leg in real time on the positive negative feeder of the feeding circuit of direct supply.When branch road insulation situation was normal, the size of current of positive and negative two feeder line branch road flows through sensor equated, opposite direction, and poor stream signal is zero; When leakage current appearred in certain branch road insulation resistance decline, leakage current sensor detected the poor stream signal of positive negative feeder branch road, with variety of way output detection signals such as Voltage-output, electric current output, RS485 digital signals.Therefore, supervisory system just can detect each feeder line branch road insulation against ground resistance by gathering the output signal of each branch sensor, accurately judges the earth fault branch road of straight-flow system.This principle route selection precision is high, is not subjected to the impact of line distribution capacitance.
At present, in the act.std of DC power supply device, clear must have the function of the insulation status of on-line monitoring straight-flow system.
The DC leakage current sensor is an indispensable Important Components in DC power system.Use the DC leakage current sensor to detect for the insulation resistance of direct supply; be widely used in the online protection of direct supply, in the safe operation of big power station, transformer station, energy-accumulating power station, photovoltaic, wind-power electricity generation, railway power supply network and motor train unit, communication base station, bringing into play vital effect.
But, during existing DC leakage current installation of sensors, the positive negative feeder of tested electric current at first will pass through secondary terminals and the rack outside connection in the rack, then bores a hole and mistake from the center sensor through hole by the wire of introducing from secondary terminals, thereby realizes measuring.There are the weak points such as feeder system is complicated, installation footprint is larger.
The utility model content
Based on this, be necessary for the problems referred to above, a kind of Novel DC leakage current sensor is provided, reach and simplify the wiring circuit, easy to install, reduce the purpose such as cost.
A kind of Novel DC leakage current sensor comprises:
With the induction box body of dc feeder incoming line and line outlet, comprise inductive coil in this induction box body, described incoming line communicates with described line outlet, and its passage runs through described inductive coil.
Above-mentioned Novel DC leakage current sensor is provided with incoming line and the line outlet of feeder line, and tested electric current enters the induction box body from incoming line, pass inner inductive coil after, leave described induction box body through line outlet.Because novel sensor self has the connection terminal function, compares with traditional sensor, can omit secondary terminals, thereby simplify circuit, reduce cost.
Among embodiment, described induction box body also comprises therein:
Be connected to the metallic conductor between described incoming line and the described line outlet.
Among embodiment, also comprise therein:
Sensor outer housing with clamping structure;
Described sensor outer housing comprises described induction box body, and described clamping structure docks with mounting guide rail, and described sensor outer housing is also with the entrance hole corresponding with the incoming line of described induction box body and the wire hole corresponding with the line outlet of described induction box body.
Implement the present embodiment, sensor card of the present utility model can be connect in orbit, make things convenient for installation and removal.Adopt the fixing connected mode of screw to compare with traditional sensors, the clamping structure of described the utility model sensor also has advantages of fastening reliable, easy for installation.
Among embodiment, also comprise therein:
With the pressing line frame that is used for fastening dc feeder of through hole, and the movable bolt that links to each other with this pressing line frame;
Implement the present embodiment, can feeder line is connected with metallic conductor by tightening movable bolt, can prevent from making feeder line and metallic conductor loose contact because of mechanical shock.
Description of drawings
Fig. 1 is the schematic diagram of the electric current leakage current sensor of prior art;
Fig. 2 is the application schematic diagram of the utility model electric current leakage current sensor;
Fig. 3 is the induction box body schematic diagram of the utility model electric current leakage current sensor;
Fig. 4 is one of the assembling schematic diagram of the induction box body of the utility model electric current leakage current sensor;
Fig. 5 be the utility model electric current leakage current sensor the induction box body the assembling schematic diagram two;
Fig. 6 is the one-piece construction schematic diagram of the utility model electric current leakage current sensor;
Fig. 7 is one of application schematic diagram of the utility model electric current leakage current sensor;
Fig. 8 be the utility model electric current leakage current sensor the application schematic diagram two.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing the utility model is described in further detail.
Fig. 1 is the schematic diagram of the electric current leakage current sensor of prior art.
The DC leakage current sensor is the vitals of direct supply, and its function is to flow the insulation against ground resistance that signal is monitored DC network by the difference that detects between the positive and negative polarities wire, realizes the insulation resistance on-line monitoring to DC power system.Thereby guarantee the safe and reliable operation of direct supply.
In DC power supply device, dc feeder all will be connected with extraneous feeder line through the connection terminal in the rack in the rack.During existing DC leakage current installation of sensors, tested current feed lines at first will pass through secondary terminals and the rack outside connection in the rack, then bores a hole and mistake from the center sensor through hole by the wire of introducing from secondary terminals, thereby realizes measuring.
Fig. 2 is the application schematic diagram of the utility model electric current leakage current sensor, comprising:
With the induction box body of dc feeder incoming line and line outlet, comprise inductive coil in this induction box body, described incoming line communicates with described line outlet, and its passage runs through described inductive coil.
Compared to Figure 1, the Novel DC leakage current sensor is provided with incoming line and the line outlet of feeder line, and tested electric current enters the induction box body from incoming line, pass inner inductive coil after, leave described induction box body through line outlet.Because novel sensor self has the connection terminal function, compares with traditional sensor, can omit secondary terminals, thereby simplify circuit, reduce cost.
Fig. 3 is the induction box body schematic diagram of the utility model electric current leakage current sensor;
Among embodiment, described induction box body also comprises therein:
Be connected to the metallic conductor 11 between described incoming line and the described line outlet.
Fig. 4 is one of the assembling schematic diagram of the induction box body of the utility model electric current leakage current sensor; Fig. 5 be the utility model electric current leakage current sensor the induction box body the assembling schematic diagram two.Wherein, Fig. 4 is the structural representation before the assembling, and Fig. 5 is the overall schematic after assembling.
Among embodiment, also comprise: the pressing line frame corresponding with described incoming line or described line outlet, and the movable bolt that is connected with this pressing line frame therein.Such as Fig. 4, shown in Figure 5, with the pressing line frame 21 of through hole, and the movable bolt 22 that links to each other with this pressing line frame 21;
One end of the through hole of institute's pressing line frame 21 communicates with incoming line or the line outlet of described induction box body, and the other end of the through hole of institute's pressing line frame 21 is corresponding with described movable bolt 22.
When the access feeder line, rotary moveable bolt 22, feeder line is pressed in the termination of described movable bolt 22, and described feeder line is connected with the interference of induction box body.Can prevent that on the one hand electro-conductive dust from entering in the induction box body from incoming line or line outlet, can prevent from the other hand separating with the induction box body because mechanical shock makes feeder line.
Fig. 6 is the one-piece construction schematic diagram of the utility model electric current leakage current sensor.Compare with Fig. 5, the embodiment of Fig. 6 also comprises the sensor outer housing of an outside, can be convenient to this novel sensor is installed in orbit.
Among embodiment, also comprise therein:
Sensor outer housing with clamping structure;
Described sensor outer housing comprises described induction box body, and described clamping structure docks with mounting guide rail, and described sensor outer housing is also with the entrance hole corresponding with the incoming line of described induction box body and the wire hole corresponding with the line outlet of described induction box body.
Fig. 7 is one of application schematic diagram of the utility model electric current leakage current sensor.
Fig. 8 be the utility model electric current leakage current sensor the application schematic diagram two.
Existing DC leakage current sensor is fixed on the guide rail with holding screw.Tested wire is bored a hole and mistake from the center pit of sensor.And novel sensor uses clamping structure directly to be clamped on the guide rail, and new sensor also has the connection terminal function, thereby can be directly installed on the guide rail of original installation secondary wiring terminals, is conducive to optimize the design of DC power cabinet.In addition, sensor card of the present utility model is connect in orbit, can make things convenient for installation and removal.Compare with the mode that is fixedly connected with of traditional sensors sampling bolt riveting, described the utility model sensor has advantages of fastening reliable, easy for installation.Track clamping schematic diagram corresponding to outside bayonet socket provide as shown in Figure 7, the clamping schematic diagram of internal bayonet corresponding to another kind of track that provide shown in Figure 8.
Wherein, described sensor outer housing comprises described induction box body and described pressing line frame 21, described clamping structure docks with mounting guide rail, and described sensor outer housing is also with the entrance hole corresponding with the incoming line of described induction box body and the wire hole corresponding with the line outlet of described induction box body; Described pressing line frame 21 is between described incoming line and entrance hole, and/or between described line outlet and wire hole.
The function of above-mentioned pressing line frame 21 can guarantee that external feeder line contacts with the reliable of sensor internal conductive channel as previously mentioned.
In order conveniently to tighten movable bolt 22, therein among embodiment, described sensor outer housing is also with the through hole corresponding with described movable bolt 22.
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 claim.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.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (5)
1. a Novel DC leakage current sensor is characterized in that, comprising:
With the induction box body of dc feeder incoming line and line outlet, comprise inductive coil in this induction box body, described incoming line communicates with described line outlet, and its passage runs through described inductive coil.
2. Novel DC leakage current sensor according to claim 1 is characterized in that, described induction box body also comprises:
Be connected to the metallic conductor between described incoming line and the described line outlet.
3. Novel DC leakage current sensor according to claim 1 and 2 is characterized in that, also comprises:
Sensor outer housing with clamping structure;
Described sensor outer housing comprises described induction box body, and described clamping structure docks with mounting guide rail, and described sensor outer housing is also with the entrance hole corresponding with the incoming line of described induction box body and the wire hole corresponding with the line outlet of described induction box body.
4. Novel DC leakage current sensor according to claim 1 and 2 is characterized in that, also comprises:
The pressing line frame corresponding with described incoming line or described line outlet, and the movable bolt that is connected with this pressing line frame.
5. Novel DC leakage current sensor according to claim 4 is characterized in that, also comprises:
Sensor outer housing with clamping structure;
Described sensor outer housing comprises described induction box body and described pressing line frame, described clamping structure docks with mounting guide rail, described sensor outer housing is also with the entrance hole corresponding with the incoming line of described induction box body, the wire hole corresponding with the line outlet of described induction box body, and the through hole corresponding with described movable bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220209803 CN202676838U (en) | 2012-05-10 | 2012-05-10 | Novel direct current leakage current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220209803 CN202676838U (en) | 2012-05-10 | 2012-05-10 | Novel direct current leakage current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202676838U true CN202676838U (en) | 2013-01-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220209803 Expired - Fee Related CN202676838U (en) | 2012-05-10 | 2012-05-10 | Novel direct current leakage current sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202676838U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104076183A (en) * | 2013-03-25 | 2014-10-01 | 欧姆龙株式会社 | Current sensor and power sensor using the same |
| CN112578186A (en) * | 2020-12-21 | 2021-03-30 | 山东积成智通新能源有限公司 | Direct-current insulation detection system and device and balance bridge measurement method |
-
2012
- 2012-05-10 CN CN 201220209803 patent/CN202676838U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104076183A (en) * | 2013-03-25 | 2014-10-01 | 欧姆龙株式会社 | Current sensor and power sensor using the same |
| CN104076183B (en) * | 2013-03-25 | 2017-06-23 | 欧姆龙株式会社 | Current sensor and the power sensor using the current sensor |
| CN112578186A (en) * | 2020-12-21 | 2021-03-30 | 山东积成智通新能源有限公司 | Direct-current insulation detection system and device and balance bridge measurement method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20130510 |