CN204719177U - A kind of DC system grounding line selection apparatus - Google Patents
A kind of DC system grounding line selection apparatus Download PDFInfo
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- CN204719177U CN204719177U CN201520457567.1U CN201520457567U CN204719177U CN 204719177 U CN204719177 U CN 204719177U CN 201520457567 U CN201520457567 U CN 201520457567U CN 204719177 U CN204719177 U CN 204719177U
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- line
- amplifier
- selection apparatus
- selecting circuit
- earthing wire
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Abstract
The utility model discloses a kind of DC system grounding line selection apparatus, be made up of the earthing wire-selecting circuit identical with circuit number of branches n and line-to-ground detector; Earthing wire-selecting circuit is made up of Hall element, amplifier; Hall element is vertically fixedly mounted on the DC loop switch end opening of circuit branch road, its transducing signal gathered incoming line grounding detector after amplifier amplifies.The utility model is stable, can send quickly and accurately and reports to the police when there is ground connection and select ground connection branch road, no longer report by mistake because erroneous judgement occurs environmental interference, embodies good ageing.
Description
Technical field
The utility model relates to a kind of line-selected earthing device, and especially a kind of DC system grounding line selection apparatus, belongs to electrical protection apparatus technical field.
Background technology
At present, general earth line selection device for converting station direct current system point position two kinds: utilizes impedance loop detection method, by selecting ground connection branch road to ground loop impedance variation; Two is utilize shape small size current mutual inductor to gather the leakage current of ground connection branch road change to obtain ground connection branch road.Although these methods more common " La Lufa " have greatly improved, all there is the complicated poor stability of device, collection signal source is weak, the problems such as erroneous judgement, rate of false alarm height.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of DC system grounding line selection apparatus.
Technical solution adopted in the utility model is:
A kind of DC system grounding line selection apparatus, is made up of the earthing wire-selecting circuit identical with circuit number of branches n and line-to-ground detector; Described each earthing wire-selecting circuit structure is identical, by Hall element, amplifier composition; Described Hall element is vertically fixedly mounted on the DC loop switch end opening of described circuit branch road, and its transducing signal gathered exports the signal input part of described amplifier to; Described grounding detector is arranged on the position of matching with Hall element in described each earthing wire-selecting circuit in direct current cabinet; + the 12v of described line-to-ground detector and-12v power output end are connected to the corresponding power input of described amplifier respectively with cable; The voltage output end of the amplifier of described each earthing wire-selecting circuit
connect the relevant voltage input end of described line-to-ground detector respectively
.
The power input of described line-to-ground detector connects 220v alternating current.
The earth terminal GND line ground connection of the earth terminal GND ' of described line-to-ground detector and the amplifier of described each earthing wire-selecting circuit.
Described DC system grounding line selection apparatus also comprises host computer, and described line-to-ground detector connects described host computer.
The beneficial effect adopting technique scheme to produce is:
The utility model is stable, can send quickly and accurately and reports to the police when there is ground connection and select ground connection branch road, no longer report by mistake because erroneous judgement occurs environmental interference, embodies good ageing.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model;
Fig. 2 is the structural representation of earthing wire-selecting circuit in the utility model.
Wherein:
1 circuit branch road, 2 Hall elements, 3 amplifiers, 4 line-to-ground detectors.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Embodiment 1:
As Figure 1-Figure 2, a kind of DC system grounding line selection apparatus, is made up of the earthing wire-selecting circuit identical with circuit branch road 1 number n and line-to-ground detector 4; Described each earthing wire-selecting circuit structure is identical, forms by Hall element 2, amplifier 3; Described Hall element 2 is vertically fixedly mounted on the DC loop switch end opening of described circuit branch road 1, and its transducing signal gathered exports the signal input part of described amplifier 3 to; Described grounding detector 4 is arranged on the position of matching with Hall element 2 in each earthing wire-selecting circuit described in direct current cabinet; + the 12v of described line-to-ground detector 4 and-12v power output end are connected to the corresponding power input of described amplifier respectively with cable; The voltage output end of the amplifier 3 of described each earthing wire-selecting circuit
connect the relevant voltage input end of described line-to-ground detector 4 respectively
.
The power input of described line-to-ground detector 4 connects 220v alternating current.
The earth terminal GND line ground connection of the earth terminal GND ' of described line-to-ground detector 4 and the amplifier 3 of described each earthing wire-selecting circuit.
Described DC system grounding line selection apparatus also comprises host computer, and described line-to-ground detector connects described host computer.
When system circuit normally runs, loop stream crosses the contrary DC current of size equal direction, and loop will produce the unequal electric current of size when ground connection occurs a certain bar circuit, and now out-of-balance current appears in loop.
The utility model selects structure more simple, runs metastable Hall element, DC loop is passed perpendicularly through Hall element, when line-to-ground produces out-of-balance current.Hall element will produce corresponding stable linear voltage.After Hall element, access an amplifier, the voltage signal after being amplified by the signal in early stage of Hall element collection is uploaded further, carries out data processing.Malfunction, misjudgement would not be there is in such detecting instrument because of other interference of the too weak easy generation of input signal.
Line-to-ground detector 4 can process from the voltage signal of all circuits after amplifying.When ground connection occurs system, judge that signal comes from that loop, host computer sends corresponding alarm sound and shows ground path simultaneously.
This use New Energy sent in 10 seconds reports to the police and selects ground connection branch road, embodies good ageing.
Claims (4)
1. a DC system grounding line selection apparatus, is characterized in that: be made up of the earthing wire-selecting circuit identical with circuit branch road (1) number n and line-to-ground detector (4); Described each earthing wire-selecting circuit structure is identical, by Hall element (2), amplifier (3) composition; Described Hall element (2) is vertically fixedly mounted on the DC loop switch end opening of described circuit branch road (1), and its transducing signal gathered exports the signal input part of described amplifier (3) to; Described grounding detector (4) is arranged on the position of matching with Hall element (2) in described each earthing wire-selecting circuit in direct current cabinet; + the 12v of described line-to-ground detector (4) and-12v power output end are connected to the corresponding power input of described amplifier respectively with cable; The voltage output end of the amplifier (3) of described each earthing wire-selecting circuit
connect the relevant voltage input end of described line-to-ground detector (4) respectively
.
2. DC system grounding line selection apparatus according to claim 1, is characterized in that: the power input of described line-to-ground detector (4) connects 220v alternating current.
3. according to DC system grounding line selection apparatus according to claim 1, it is characterized in that: the earth terminal GND line ground connection of the earth terminal GND ' of described line-to-ground detector (4) and the amplifier (3) of described each earthing wire-selecting circuit.
4. according to DC system grounding line selection apparatus according to claim 1, it is characterized in that: described DC system grounding line selection apparatus also comprises host computer, described line-to-ground detector connects described host computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520457567.1U CN204719177U (en) | 2015-06-30 | 2015-06-30 | A kind of DC system grounding line selection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520457567.1U CN204719177U (en) | 2015-06-30 | 2015-06-30 | A kind of DC system grounding line selection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204719177U true CN204719177U (en) | 2015-10-21 |
Family
ID=54318165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520457567.1U Active CN204719177U (en) | 2015-06-30 | 2015-06-30 | A kind of DC system grounding line selection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204719177U (en) |
-
2015
- 2015-06-30 CN CN201520457567.1U patent/CN204719177U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |