CN203859512U - PT arc-extinguishing protective device - Google Patents
PT arc-extinguishing protective device Download PDFInfo
- Publication number
- CN203859512U CN203859512U CN201420283777.9U CN201420283777U CN203859512U CN 203859512 U CN203859512 U CN 203859512U CN 201420283777 U CN201420283777 U CN 201420283777U CN 203859512 U CN203859512 U CN 203859512U
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- voltage
- protective device
- arc
- vacuum contactor
- current
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- Expired - Fee Related
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Abstract
The utility model relates to a PT arc-extinguishing protective device used for protecting a potential transformer. The protective device comprises a second high-voltage current-limiting fuse and a vacuum contactor. A potential transformer circuit is connected with the second high-voltage current-limiting fuse. The second high-voltage current-limiting fuse is connected with the vacuum contactor in series. The vacuum contactor is directly grounded. The protective device is capable of eliminating indirect arc light, continuous arc light and the like generated in the potential transformer circuit so as to enable the final action of the vacuum contactor and enable the vacuum contactor to be completely metallically grounded. The protective device is integrally combined with protective functions such as voltage monitoring, harmonic elimination and arc extinguishing, so that the safety of the potential transformer is substantially improved, and the safe operation of the potential transformer circuit is ensured.
Description
Technical field
The utility model relates to a kind of PT arc-extinction protective device, belongs to electic protection technical field.
Background technology
Along with the development of modern power network, it is a kind of inexorable trend that overhead transmission line is progressively replaced by the cable line of solid insulation.The build-up effect puncturing due to solid insulation, its internal overvoltage, the arc grounding overvoltage particularly producing during electrical network generation single-phase intermittent arc earthing and the ferro-resonance over-voltage exciting thus, oneself becomes a threat greatly of this class electric power netting safe running, wherein serious with single-phase arc grounding overvoltage.It is saturated that arc grounding overvoltage can make voltage transformer (Potential Transformer is called for short PT) occur, and excites ferro resonance, causes voltage transformer seriously to transship, and causes fuse blows or instrument transformer to burn.Because the arc grounding overvoltage duration is long, energy very easily surpasses the ability to bear of lightning arrester, causes Explosion of on Arrester simultaneously.In addition, the accumulation that the overvoltage of the high amplitude that arc grounding produces has been aggravated the solid insulations such as cable destroys, and even punctures and blows out, and has very large potential safety hazard.
Utility model content
The deficiency that the utility model exists for prior art just, provides a kind of PT arc-extinction protective device.
For addressing the above problem, technical solution adopted in the utility model is as follows:
A kind of PT arc-extinction protective device; be used for protecting voltage transformer; described protective device comprises: the second high-voltage and current-limitation fuse and vacuum contactor; on described mutual induction of voltage circuit, access the second high-voltage and current-limitation fuse; the second high-voltage and current-limitation fuse is connected in series vacuum contactor, the direct ground connection of vacuum contactor.
As the improvement of technique scheme, described protective device comprises: the first high-voltage and current-limitation fuse, voltage suppressor, processor module and warning device; Mutual induction of voltage circuit is connected in series voltage transformer by the first high-voltage and current-limitation fuse, and voltage mutual inductor serial connects voltage suppressor, the direct ground connection of voltage suppressor; Open delta one end at voltage transformer connects processor module, on processor module, in controllable silicon mode, is connected with warning device.
Compared with prior art, implementation result of the present utility model is as follows for the utility model:
Protective device described in the utility model, adopt processor module to voltage transformer open delta voltage judge, analysis and data acquisition, it can distinguish resonance, overvoltage, single-phase earthing etc., prevents misoperation.This protective device is eliminated the indirect arc light producing in mutual induction of voltage circuit, lasting arc light etc., and vacuum contactor is finally moved, and complete metal ground connection.In addition, this protective device is integrated in conjunction with defencive functions such as voltage monitoring, harmonic elimination, extinguishing arcs, greatly improves the fail safe of voltage transformer, guarantees the operation of mutual induction of voltage circuit safety.
Accompanying drawing explanation
Fig. 1 is PT arc-extinction protective device structural representation described in the utility model.
Embodiment
Content of the present utility model is described below in conjunction with specific embodiments.
Be illustrated in figure 1 PT arc-extinction protective device structural representation described in the utility model.Protective device described in the utility model, is used for protecting voltage transformer 1 harmonic elimination, extinguishing arc, and mutual induction of voltage circuit is connected in series voltage transformer 1 by the first high-voltage and current-limitation fuse 2, then is connected in series the rear ground connection of voltage suppressor 3.When high voltage transient pulse is excessive, the first high-voltage and current-limitation fuse 2 fuse protections.When high voltage transient pulse does not reach fusing voltage, utilize voltage suppressor 3 to suppress the high-voltage pulse that in mutual induction of voltage circuit, moment produces, protection voltage transformer 1.Open delta one end at voltage transformer 1 connects processor module 4, on processor module 4, in controllable silicon mode, is connected with warning device 5.When mutual induction of voltage circuit produces resonance, by processor module 4, judged, and drive warning device 5 to give the alarm by controllable silicon mode, and intervene in time processing.
On mutual induction of voltage circuit, the second high-voltage and current-limitation fuse 6 is also set and vacuum contactor 7, the second high-voltage and current-limitation fuses 6 are connected in series the rear ground connection of vacuum contactor 7.The second high-voltage and current-limitation fuse 6 and vacuum contactor 7 are connected in parallel with voltage transformer 1 and the first high-voltage and current-limitation fuse 2.The second high-voltage and current-limitation fuse 6 and vacuum contactor 7 are used for eliminating the indirect arc light producing in mutual induction of voltage circuit, lasting arc light etc., and vacuum contactor 7 is finally moved, and complete metal ground connection.
Protective device described in the utility model, also comprises isolating switch 8, and isolating switch 8 is kept apart bus and mutual induction of voltage circuit, further plays a protective role.
Protective device described in the utility model, adopts processor module 4 to carry out discriminatory analysis, and the open delta voltage of voltage transformer 1 is carried out to data acquisition.By Digital Signal Processings such as digital measurement, filtering, amplifications, to data analysis, calculating, judge current state.If there is the ferro resonance of frequency in setting range, processor module 4 makes controlled silicon conducting, allows ferro resonance rapidly disappear under powerful damping.After ferro resonance is eliminated, processor module is done corresponding record, storage, and automatic alarm, the relevant resonance information of demonstration (comprising time of origin, frequency, amplitude etc.).If overvoltage or single-phase earthing, processor module 4 is made after diagnosis, and protective device provides respectively and shows and report to the police, and automatically notes down, stores relevant fault message.Finally, processor module 4 returns to initial condition, and continues to detect open delta voltage.
Claims (2)
1. a PT arc-extinction protective device; be used for protecting voltage transformer (1); it is characterized in that; described protective device comprises: the second high-voltage and current-limitation fuse (6) and vacuum contactor (7); on described mutual induction of voltage circuit, access the second high-voltage and current-limitation fuse (6); the second high-voltage and current-limitation fuse (6) is connected in series vacuum contactor (7), and vacuum contactor (7) is ground connection directly.
2. a kind of PT arc-extinction protective device as claimed in claim 1, is characterized in that, described protective device comprises: the first high-voltage and current-limitation fuse (2), voltage suppressor (3), processor module (4) and warning device (5); Mutual induction of voltage circuit is connected in series voltage transformer (1) by the first high-voltage and current-limitation fuse (2), and voltage transformer (1) is connected in series voltage suppressor (3), and voltage suppressor (3) is ground connection directly; Open delta one end at voltage transformer (1) connects processor module (4), and processor module (4) is upper is connected with warning device (5) in controllable silicon mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420283777.9U CN203859512U (en) | 2014-05-28 | 2014-05-28 | PT arc-extinguishing protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420283777.9U CN203859512U (en) | 2014-05-28 | 2014-05-28 | PT arc-extinguishing protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203859512U true CN203859512U (en) | 2014-10-01 |
Family
ID=51609351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420283777.9U Expired - Fee Related CN203859512U (en) | 2014-05-28 | 2014-05-28 | PT arc-extinguishing protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203859512U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108767815A (en) * | 2018-07-17 | 2018-11-06 | 云南电网有限责任公司红河供电局 | Electromagnetic potential transformer auto by pass harmonic elimination apparatus |
-
2014
- 2014-05-28 CN CN201420283777.9U patent/CN203859512U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108767815A (en) * | 2018-07-17 | 2018-11-06 | 云南电网有限责任公司红河供电局 | Electromagnetic potential transformer auto by pass harmonic elimination apparatus |
| CN108767815B (en) * | 2018-07-17 | 2024-02-02 | 云南电网有限责任公司红河供电局 | Automatic bypass resonance elimination device of electromagnetic voltage transformer |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141001 Termination date: 20160528 |