CN201118199Y - Electric current earthing centralized monitoring apparatus - Google Patents
Electric current earthing centralized monitoring apparatus Download PDFInfo
- Publication number
- CN201118199Y CN201118199Y CNU2007201232764U CN200720123276U CN201118199Y CN 201118199 Y CN201118199 Y CN 201118199Y CN U2007201232764 U CNU2007201232764 U CN U2007201232764U CN 200720123276 U CN200720123276 U CN 200720123276U CN 201118199 Y CN201118199 Y CN 201118199Y
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- CN
- China
- Prior art keywords
- relay
- current
- display
- zero sequence
- centralized monitoring
- 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 relates to a centralized monitoring device for current grounding. A multiway switch 2 is connected with a zero sequence current transformer 1 and a current relay 3 in series to form a loop; the current relay 3 controls a voltage relay 4 and a display 5. When the device goes wrong, the multiway switch 2 on a central control display is switched to sequentially connect the secondary outlet wire of a feeder line zero sequence current transformer 1, and then the fault line can be found according to the relay 4 and the display of the display 5, thereby achieving the purpose of centralized monitoring.
Description
Technical field
The utility model relates to a kind of electric current ground connection supervising device, and is especially relevant with electric current ground connection centralized monitor.
Background technology
Single cabinet ground protection of the 6kV of electric substation feeder line cabinet adopts LJ-Φ 75 type zero sequence current mutual inductors and the supporting use of DL-11/0.2 type current relay to provide ground signalling usually, can be according to ground signalling judgment device fault.But,,, then be unfavorable for phenomenon of the failure being observed judgement, so can't implement effective centralized monitor to the grounding phenomenon of feeder line in the very first time if the feeder line cabinet is more because this ground protection system must install by single cabinet.
Summary of the invention
The purpose of this utility model provides a kind of electric current ground connection and concentrates pre-alarm display device.
The purpose of this utility model reaches like this: comprise zero sequence current mutual inductor and current relay, and special voltage relay, variable connector and the display that is provided with, wherein variable connector is connected with the secondary outlet of zero sequence current mutual inductor respectively, the other end links to each other with current relay, form the serial connection loop, current relay control voltage relay, voltage relay control display.
Have as can be known above-mentioned, the supporting use of zero sequence current mutual inductor and current relay, system normally moves or is under the non-ground state, the cable core three-phase current vector by zero sequence current mutual inductor and be zero, current relay is failure to actuate; When circuit generation earth fault, in the zero sequence current mutual inductor secondary coil, produce induced potential, the current relay action.Because be provided with multicircuit switch, every way switch is connected one road feeder line.Like this, when equipment breaks down,, connect feeder line successively, find fault generation circuit according to signal relay and alarm window demonstration, thereby reach the purpose of centralized monitor by changing the multicircuit switch on the central control flow.
Description of drawings
Fig. 1 is a key wiring diagram of the present utility model.
Embodiment
Referring to Fig. 1, manufacture a ground signalling loop circuit plate of forming by voltage relay 4 and current relay 3.The ground signalling loop of the secondary outlet and the current relay 3 of the zero sequence current mutual inductor 1 on each feeder line road, road being formed by multicircuit switch 2 is connected in series, and relay 3 outputs to voltage relay 4 with signal and exports display 5 again to.Current relay 3 can be with model: DL-11/0.2 type current relay.
From the above, when equipment breaks down,, connect feeder line successively, find fault generation circuit according to voltage relay 4 and alarm window demonstration, thereby reach the purpose of centralized monitor by changing the multicircuit switch on the central control flow.Perhaps can be set to the scanning electron circuit to multicircuit switch 2, press the secondary outlet of the zero sequence current mutual inductor 1 on each feeder line road, road of certain frequency automatic scan, and the writing scan address, can on display, show in the lump for the feeder line that breaks down.
Claims (1)
1, a kind of electric current ground connection centralized control apparatus, comprise: zero sequence current mutual inductor (1) and current relay (3), and special voltage relay (4), variable connector (2) and the display (5) that is provided with, wherein variable connector (2) is connected with the secondary outlet of zero sequence current mutual inductor (1) respectively, the other end links to each other with current relay (3), zero sequence current mutual inductor (1), variable connector (2), current relay (3) form the serial connection loop, current relay (3) control voltage relay (4), voltage relay (4) control display (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201232764U CN201118199Y (en) | 2007-08-21 | 2007-08-21 | Electric current earthing centralized monitoring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201232764U CN201118199Y (en) | 2007-08-21 | 2007-08-21 | Electric current earthing centralized monitoring apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201118199Y true CN201118199Y (en) | 2008-09-17 |
Family
ID=39992788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201232764U Expired - Fee Related CN201118199Y (en) | 2007-08-21 | 2007-08-21 | Electric current earthing centralized monitoring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201118199Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916385A (en) * | 2011-08-02 | 2013-02-06 | 伊春电业局 | Instrument testing protective device |
-
2007
- 2007-08-21 CN CNU2007201232764U patent/CN201118199Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916385A (en) * | 2011-08-02 | 2013-02-06 | 伊春电业局 | Instrument testing protective device |
| CN102916385B (en) * | 2011-08-02 | 2015-04-22 | 伊春电业局 | Instrument testing protective device |
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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: 20080917 Termination date: 20120821 |