CN202471873U - DC system ground checking device - Google Patents
DC system ground checking device Download PDFInfo
- Publication number
- CN202471873U CN202471873U CN2011204971393U CN201120497139U CN202471873U CN 202471873 U CN202471873 U CN 202471873U CN 2011204971393 U CN2011204971393 U CN 2011204971393U CN 201120497139 U CN201120497139 U CN 201120497139U CN 202471873 U CN202471873 U CN 202471873U
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- CN
- China
- Prior art keywords
- grounding
- earthing
- artificial
- utility
- checking device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model provides a DC system ground checking device composed of artificial grounding bridges (1), a photoelectric coupler (2) and a relay (3). Input terminals of a power source having two ends in a ground connection are both provided with resistors. The two artificial grounding bridges (1) and the photoelectric coupler (2) connect with the grounding power source in series. The photoelectric coupler (2) is arranged between the two artificial grounding bridges (1). A Schmidt trigger (4) and the relay (3) connect with the photoelectric coupler (2) successively. The grounding power source also connects with a sensor (5) in parallel. The DC system ground checking device provided by the utility model has beneficial effects of reflecting a system grounding state in real time and guaranteeing the safe and stable operation of a DC system reliably and effectively. And the DC system ground checking device provided by the utility model can be applied simply and has a low cost.
Description
Technical field
The utility model relates to a kind of simple in structure that voltage-to-ground detects behind the DC earthing, lower-cost device of indicating.
Background technology
At present, known DC earthing testing fixture complex structure, cost is too high; And need to cooperate supervising device to be grounded warning function, and the utility model can be through the judgement of circuit, and real time reaction has the phenomenon of system earth fault; Device construction is simple, and is easy to use with low cost.
The utility model content
The utility model technical matters to be solved provides the dc system grounding testing fixture that is applicable in the electrical equipment.
The utility model principal feature is: be made up of artificial earthing's electric bridge, photoelectricity coupling, relay; The input end of two-terminal-grounding power supply all is provided with a resistance, the outer series connection of its earthing power supply two artificial earthing's electric bridges, photoelectricity coupling; Its photoelectricity coupling is arranged between two artificial earthing's electric bridges; Connect Schmidt's shaping successively outside its photoelectricity coupling, a relay, the outer also parallelly connected sensor of its earthing power supply.
The beneficial effect of the utility model is: the state that reflects system earth that can be real-time, and the safe and stable operation of reliable and effective assurance straight-flow system, and also utilization is simple, with low cost.
Description of drawings
Fig. 1 is the utility model product structure synoptic diagram
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
Like the said dc system grounding testing fixture of Fig. 1, constitute by artificial earthing's electric bridge 1, photoelectricity coupling 2, relay 3, the input end of two-terminal-grounding power supply all is provided with a resistance; The outer series connection of its earthing power supply two artificial earthing's electric bridges 1; One photoelectricity coupling 2, its photoelectricity coupling 2 is arranged between two artificial earthing's electric bridges 1, connects Schmidt's shaping 4 successively outside its photoelectricity coupling 2; One relay 3, the outer also parallelly connected sensor 5 of its earthing power supply.
Two artificial earthing's electric bridges 1, and two resistance that are provided with of earthing power supply output terminal between, under the normal condition, difference between current is 0.If when having the busbar grounding situation to take place, there is electric current to produce between this moment and the artificial earthing's electric bridge, the input end of this current drives photoelectricity coupling 2, photoelectricity are coupled after 2 conductings, link to each other with Schmidt's shaping 4 through output terminal, drive relay 3 then, and the warning contact is exported.
Claims (1)
1. the dc system grounding testing fixture is made up of artificial earthing's electric bridge (1), photoelectricity coupling (2), relay (3), and it is characterized in that: the input end of two-terminal-grounding power supply all is provided with a resistance; The outer series connection of its earthing power supply two artificial earthing's electric bridges (1); One photoelectricity coupling (2), its photoelectricity coupling (2) is arranged between two artificial earthing's electric bridges (1), connects Schmidt's shaping (4) successively outside its photoelectricity coupling (2); One relay (3), the outer also parallelly connected sensor (5) of its earthing power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204971393U CN202471873U (en) | 2012-05-11 | 2012-05-11 | DC system ground checking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204971393U CN202471873U (en) | 2012-05-11 | 2012-05-11 | DC system ground checking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202471873U true CN202471873U (en) | 2012-10-03 |
Family
ID=46920025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204971393U Expired - Fee Related CN202471873U (en) | 2012-05-11 | 2012-05-11 | DC system ground checking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202471873U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749476A (en) * | 2013-12-25 | 2015-07-01 | 国家电网公司 | Grounding detection device and grounding detection method |
-
2012
- 2012-05-11 CN CN2011204971393U patent/CN202471873U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749476A (en) * | 2013-12-25 | 2015-07-01 | 国家电网公司 | Grounding detection device and grounding detection 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: 20121003 Termination date: 20130511 |