CN202309056U - Voltage limiting arc-extinction protective device - Google Patents
Voltage limiting arc-extinction protective device Download PDFInfo
- Publication number
- CN202309056U CN202309056U CN2011202919370U CN201120291937U CN202309056U CN 202309056 U CN202309056 U CN 202309056U CN 2011202919370 U CN2011202919370 U CN 2011202919370U CN 201120291937 U CN201120291937 U CN 201120291937U CN 202309056 U CN202309056 U CN 202309056U
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- China
- Prior art keywords
- overvoltage
- protector
- arc
- controller
- vacuum contactor
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- Expired - Fee Related
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Abstract
The utility model discloses a voltage limiting arc-extinction protective device, which comprises protective end lines led from a three-phase line of a protected system respectively. The protective end lines are connected with a high-energy overvoltage protector, the lower end of the high-energy overvoltage protector is grounded, the protective end lines located in front of the high-energy overvoltage protector are sequentially connected with a high-voltage fuse protector, a voltage transformer and a controller, the protective end lines located in front of the high-voltage fuse protector are sequentially connected with a current limiting fuse protector and a vacuum contactor and then are grounded, and the control end of the vacuum contactor is connected with the controller through a lead. The voltage limiting arc-extinction protective device integrates an overvoltage restraining and an arc-extinction device, can effectively limit atmospheric overvoltage, switching overvoltage, resonance overvoltage and arc-light grounding overvoltage, is simple in structure and reliable in action and greatly improves safety of the system.
Description
Technical field
The utility model is the novel protection the complete sets of equipment that are applied in the electric power system, system's internal overvoltage resonant is played the effect that suppresses and eliminate.
Technical background
In electric power system, reliable for system safety operation and power supply, the power distribution network of most 6～66kV adopts the isolated neutral mode; When single-phase earthing takes place when, flow through the capacity current that normally is no more than 10A of earth point, this electric arc is not enough to smooth combustion; But form intermittent electric arc off and on; The vibration that this will cause system inductance capacitance loop causes arcing ground, and system is overvoltage condition.Original extinguishing arc, harmonic elimination apparatus are to eliminate the fruitful protection equipment of arc grounding overvoltage on the market, but in the electric power system superpotential form not only only this is a kind of, also have atmospheric over-voltage, switching overvoltage, resonance overvoltage etc.Address these problems, must seek more advanced, reliable new departure.
The utility model content
In order to overcome the above problems, the utility model provides a kind of protective device that lets electric equipment in the electric power system avoid arc grounding overvoltage and other multiple overvoltage infringement.
The technical scheme of the utility model is following:
This pressure limiting extinguishing arc protective device; Its course of work and know-why are: protection end line A1, B1, the C1 from being drawn by the triple line A of protection system, B, C respectively; This protection end line A1, B1, the last high energy overvoltage protector GNDCB that is connected to of C1; The lower end ground connection of high energy overvoltage protector GNDCB; Be positioned at last high-tension fuse D2, voltage transformer pt and the controller KWX of being connected to successively of protection end line A1, B1, C1 in high energy overvoltage protector GNDCB the place ahead; Be positioned at that protection end line A1, B1, the C1 in fuse D2 the place ahead is last to be connected to ground connection behind current limiting fuse RD1 and vacuum contactor JZa, JZb, the JZc successively, the control end of vacuum contactor JZa, JZb, JZc inserts described controller KWX through lead.
Vacuum contactor JZa, JZb, JZc must be could effectively work in the switch controlling signal source with the output signal of controller KWX, accomplish parameter preset protection and service requirement.
High energy overvoltage protection device GNDCB is with arc-extinction device and the product that the inhibition overvolatge device fuses into one as suppressing the overvoltage Primary Component, both can eliminate the arc grounding overvoltage, can suppress the overvoltage of other form in the electric power system again.
The beneficial effect of the utility model:
1, the utility model can be eliminated the single-phase gap of 3～35kV neutral nondirect earthing network arcing ground over-voltage effectively; Its extinguishing arc mechanism and electric network capacitance and current size are irrelevant; Thereby not receiving the influence that power system operating mode changes and electrical network enlarges, big minor scale power net all can use.
2, the utility model is provided with high energy overvoltage protection device GNDCB, and its energy-absorbing capacity exceeds an one magnitude of common overvoltage protection device, so can suppress atmospheric over-voltage and all internal overvoltages effectively.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
Referring to Fig. 1; This pressure limiting extinguishing arc protective device; Include protection end line A1, B1, the C1 from being drawn respectively by the triple line A of protection system, B, C; Protection end line A1, B1, the last high energy overvoltage protector GNDCB that is connected to of C1; The lower end ground connection of high energy overvoltage protector GNDCB; Be positioned at last high-tension fuse D2, voltage transformer pt and the controller KWX of being connected to successively of protection end line A1, B1, C1 in high energy overvoltage protector GNDCB the place ahead, be positioned at that protection end line A1, B1, the C1 in high-tension fuse D2 the place ahead is last to be connected to ground connection behind current limiting fuse RD1 and vacuum contactor JZa, JZb, the JZc successively, the control end of vacuum contactor JZa, JZb, JZc is through lead access controller KWX.
Vacuum contactor JZa, JZb, JZc are the switch controlling signal source with the output signal of controller KWX.Vacuum contactor JZa, JZb, JZc are the actuator of arc-extinction device.
Claims (2)
1. a pressure limiting extinguishing arc protective device is characterized in that: from by the triple line A of protection system, B, last protection end line A1, B1, the C1 of drawing respectively of C, be connected with high energy overvoltage protector GNDCB on this protection end line respectively; The lower end ground connection of high energy overvoltage protector GNDCB; The protection end line A1 in its place ahead, B1, last high-tension fuse D2, voltage transformer pt and the controller KWX of being connected to successively of C1; Be positioned at and be connected to ground connection behind current limiting fuse RD1 and vacuum contactor JZa, JZb, the JZc on the protection end line in fuse D2 the place ahead successively, the control end of vacuum contactor JZa, JZb, JZc is through lead access device controller KWX.
2. pressure limiting extinguishing arc protective device according to claim 1, its described vacuum contactor JZa, JZb, JZc are that the output signal with controller KWX is the switch controlling signal source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202919370U CN202309056U (en) | 2011-08-11 | 2011-08-11 | Voltage limiting arc-extinction protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202919370U CN202309056U (en) | 2011-08-11 | 2011-08-11 | Voltage limiting arc-extinction protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202309056U true CN202309056U (en) | 2012-07-04 |
Family
ID=46377870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202919370U Expired - Fee Related CN202309056U (en) | 2011-08-11 | 2011-08-11 | Voltage limiting arc-extinction protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202309056U (en) |
-
2011
- 2011-08-11 CN CN2011202919370U patent/CN202309056U/en not_active Expired - Fee Related
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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 |
Granted publication date: 20120704 Termination date: 20150811 |
|
| EXPY | Termination of patent right or utility model |