CN203135432U - Arc-resonance extinction route-selecting over-voltage protection device - Google Patents
Arc-resonance extinction route-selecting over-voltage protection device Download PDFInfo
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- CN203135432U CN203135432U CN 201320135946 CN201320135946U CN203135432U CN 203135432 U CN203135432 U CN 203135432U CN 201320135946 CN201320135946 CN 201320135946 CN 201320135946 U CN201320135946 U CN 201320135946U CN 203135432 U CN203135432 U CN 203135432U
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Abstract
The utility model provides an arc-resonance extinction route-selecting over-voltage protection device, which comprises an over-voltage integration protector, an isolation switch, a voltage transformer, a vacuum contactor, a high voltage fusing resistor and a ZRX controller, the lower end of the over-voltage integration protector enables ground connection, and a high voltage fuse is connected between the voltage transformer and the isolation switch in series. When the over-voltage protection device is accessed to a non-direct grounding system, the voltage transformer detects voltage of the non-direct grounding system, and voltage data is input to the ZRX controller, closing of a vacuum contactor is controlled through the ZRX controller, the arc extinguishing can be realized by closing of the vacuum contactor, large power which enables parallel connection at a voltage transformer secondary side opening triangle loop is used for destroying resonance parameter, consuming resonance energy and eliminating resonance fault, and over-voltage restriction protection during a breaking or closing process of the vacuum contactor can be realized through the over-voltage integration protector.
Description
Technical field
The utility model relates to power distribution system secure maintenance technology field, is specifically related to a kind of extinguishing arc resonance eliminating wire-selection overvoltage protection.
Background technology
In the electric power system high speed development, system safety operation and power supply reliability all are vital problems.Because large industrial enterprise and residential quarter power consumption equipment constantly increase.The power distribution network in the most of areas of China adopts the operational mode of isolated neutral, before causing electrical network capacity current being far longer than over the ground, behind the single-phase earthing, electric arc is difficult for extinguishing, the time that electric arc exists is more long, and the intermittence arc grounding overvoltage of generation is more high, causes rate of failure obviously to rise.
Therefore those skilled in the art press for the problem how solution better eliminates arc light harm, simultaneously with the overvoltage Limiting of arc overvoltage, resonance overvoltage and other types at reduced levels.
The utility model content
At above-mentioned deficiency, the purpose of this utility model provides a kind of extinguishing arc resonance eliminating wire-selection overvoltage protection.
The technical scheme that its technical problem that solves the utility model adopts is:
A kind of extinguishing arc resonance eliminating wire-selection overvoltage protection; has the overvoltage comprehensive protection device; isolating switch; voltage transformer; vacuum contactor; high-voltage fuse resistance and ZRX controller; wherein the upper end of isolating switch is connected with bus; the lower end is taken over the voltage comprehensive protection device respectively; high-voltage fuse resistance and voltage transformer; the lower end ground connection of described voltage transformer; the upper end of the following termination vacuum contactor of described high-voltage fuse resistance; described ZRX controller is connected with vacuum contactor with voltage transformer respectively; the high-tension fuse of connecting between the lower end ground connection of described overvoltage comprehensive protection device, described voltage transformer and isolating switch.
Described ZRX controller is provided with the RS485 communication interface.
The interface of described ZRX controller adopts light/electricity to isolate.
Described extinguishing arc resonance eliminating wire-selection overvoltage protection is provided with electrification display, and described electrification display upper end is connected its lower end ground connection with the lower end of isolating switch.
Series capacitance between described electrification display and the isolating switch.
Described vacuum contactor is the high voltage permanent vacuum contactor of three-phase split.
The lower end series current instrument transformer ground connection of described vacuum contactor.
The beneficial effects of the utility model are; after the utility model inserts non-direct ground system; the voltage of voltage transformer detection system; voltage data is input to the ZRX controller; by ZRX controller control vacuum contactor closure; closure by vacuum contactor realizes extinguishing arc; simultaneously by being connected in parallel on the high-power harmonic elimination resistance in voltage transformer secondary side open delta loop; carrying out resonant parameter destroys; consume resonant energy; eliminate the resonance fault, simultaneously by the overvoltage Limiting protection in overvoltage comprehensive protection device realization vacuum contactor disconnection or the closing course.
Description of drawings
Fig. 1 is electrical schematics of the present utility model.
Among the figure, 1, the overvoltage comprehensive protection device, 2, current transformer, 3, vacuum contactor, 4, high-voltage fuse resistance, 5, voltage transformer, 6, electrification display, 7, electric capacity, 8, high-tension fuse, 9, isolating switch, 10, the ZRX controller.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described further:
Referring to Fig. 1; the utlity model has overvoltage comprehensive protection device 1; isolating switch 9; voltage transformer 5; vacuum contactor 3; high-voltage fuse resistance 4 and ZRX controller 10; wherein the upper end of isolating switch 9 is connected with bus; the lower end is taken over voltage comprehensive protection device 1 respectively; high-voltage fuse resistance 4 and voltage transformer 5; the lower end ground connection of described voltage transformer 5; the upper end of the following termination vacuum contactor 3 of described high-voltage fuse resistance 4; described ZRX controller 10 is connected with vacuum contactor 3 with voltage transformer 5 respectively; the high-tension fuse 8 of connecting between the lower end ground connection of described overvoltage comprehensive protection device 1, described voltage transformer 5 and isolating switch 9.
Overvoltage comprehensive protection device 1 is all kinds of superpotential first devices of restriction in the utility model, be mainly used in limiting atmospheric over-voltage and switching overvoltage, it adopts big capacity ZnO non-linear element to form, described overvoltage comprehensive protection device 1 is the zinc oxide overvoltage protection device that a kind of special high energy holds, what it adopted is ZnO nonlinear resistance and the combined structure of discharging gap that can hold greatly, because clearance component cooperates with ZnO valve plate, has solved chargeability and the power frequency problem of aging of protector; Its impact coefficient is 1, and the discharge voltage value under the various voltage waveforms equates that not influenced by voltage waveform, the overvoltage protection value is accurate, and protective value is good; Adopt four stars type connection simultaneously, alternate overvoltage can be reduced greatly, compare with conventional lightning arrester, alternate overvoltage has reduced 60-70%, and the protection reliability improves greatly.
Described vacuum contactor 3 is the high voltage permanent vacuum contactor of three-phase split, but vacuum contactor 3 adopts the high voltage permanent vacuum contactor of phase-splitting control, its three-phase split, each phase one end is connected to bus respectively, other end ground connection, and vacuum contactor 3 is in off-state when normally moving, be subjected to ZRX controller 10 to control and move, each mutually between locking, after wherein arbitrary closure mutually made this phase busbar grounding, any one in other two-phase can never be moved closure mutually.When system's generation arc grounding, make it be transformed into stable metallic earthing by unsettled arc grounding fault, thereby protected the equipment in the system.
High-voltage fuse resistance 4 adopts the high-voltage and current-limitation fusing resistor; it is as the backup protection device of whole device; have the capacity of cut-offfing big, cut-off rapidly, current limitation effect is good, cut-off specific functions such as arc voltage is low, guarantees to meet backup protection reliability of the present utility model.
Described ZRX controller 10 is provided with the RS485 communication interface, the real time fail information of system and the working condition of device can be reported control centre.
The interface of described ZRX controller 10 adopts light/electricity to isolate, adopt light/electricity to isolate the method for resisting electromagnetic interference as interface, can eliminate power supply and primary system to the interference of controller, make the good in anti-interference performance of ZRX controller 10 of the present utility model, the reliability height.
Described extinguishing arc resonance eliminating wire-selection overvoltage protection is provided with electrification display; described electrification display 6 upper ends are connected with the lower end of isolating switch 9; its lower end ground connection; the ZRX controller can show in digital form to the voltage data of system; directly show convenient the observation at the enterprising line data of electrification display.
Lower end series current instrument transformer 2 ground connection of described vacuum contactor 3 for detection of current value of the present utility model, and show by electrification display.
Extinguishing arc: when system's generation arc grounding, ZRX controller 10 is judged the separate and arc grounding type of ground connection, send vacuum contactor 3 closures that instruction makes the fault phase simultaneously, there is system unsettled arc grounding fault to become stable metallic earthing fault, the voltage to earth of fault phase reduces to 0, the arc light of former earth fault disappears, and the voltage to earth of other two-phases is increased to line voltage.
Harmonic elimination: what the utility model adopted is microcomputer secondary harmonic elimination technology; when system's generation resonance; ZRX controller 10 inserts powerful harmonic elimination resistance in open delta winding moment of voltage transformer 5; utilize harmonic elimination resistance to destroy the resonant parameter of system; consume resonant energy; thereby the resonance fault of the system of elimination; it is fast to have a response time; the characteristics that the harmonic elimination effect is high; voltage output to voltage transformer 5 protection windings (open delta) simultaneously has no effect, and has avoided the shortcoming of the influence of traditional harmonic elimination technique influence voltage transformer 5 protection winding voltage outputs.
Embodiment should not be considered as restriction of the present utility model, but any improvement of doing based on spirit of the present utility model, all should be within protection range of the present utility model.
Claims (7)
1. extinguishing arc resonance eliminating wire-selection overvoltage protection; it is characterized in that: have overvoltage comprehensive protection device (1); isolating switch (9); voltage transformer (5); vacuum contactor (3); high-voltage fuse resistance (4) and ZRX controller (10); wherein the upper end of isolating switch (9) is connected with bus; the lower end is taken over voltage comprehensive protection device (1) respectively; high-voltage fuse resistance (4) and voltage transformer (5); the lower end ground connection of described voltage transformer (5); the upper end of the following termination vacuum contactor (3) of described high-voltage fuse resistance (4); described ZRX controller (10) is connected with vacuum contactor (3) with voltage transformer (5) respectively; the high-tension fuse (8) of connecting between the lower end ground connection of described overvoltage comprehensive protection device (1), described voltage transformer (5) and isolating switch (9).
2. extinguishing arc resonance eliminating wire-selection overvoltage protection according to claim 1 is characterized in that, described ZRX controller (10) is provided with the RS485 communication interface.
3. extinguishing arc resonance eliminating wire-selection overvoltage protection according to claim 1 is characterized in that, the interface of described ZRX controller (10) adopts light/electricity to isolate.
4. extinguishing arc resonance eliminating wire-selection overvoltage protection according to claim 1; it is characterized in that; described extinguishing arc resonance eliminating wire-selection overvoltage protection is provided with electrification display, and described electrification display (6) upper end is connected its lower end ground connection with the lower end of isolating switch (9).
5. extinguishing arc resonance eliminating wire-selection overvoltage protection according to claim 4 is characterized in that, series capacitance (7) between described electrification display (6) and the isolating switch (9).
6. extinguishing arc resonance eliminating wire-selection overvoltage protection according to claim 1 is characterized in that, described vacuum contactor (3) is the high voltage permanent vacuum contactor of three-phase split.
7. according to claim 1 or 6 described extinguishing arc harmonic elimination overvoltage protections, it is characterized in that lower end series current instrument transformer (2) ground connection of described vacuum contactor (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320135946 CN203135432U (en) | 2013-03-25 | 2013-03-25 | Arc-resonance extinction route-selecting over-voltage protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320135946 CN203135432U (en) | 2013-03-25 | 2013-03-25 | Arc-resonance extinction route-selecting over-voltage protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203135432U true CN203135432U (en) | 2013-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320135946 Expired - Fee Related CN203135432U (en) | 2013-03-25 | 2013-03-25 | Arc-resonance extinction route-selecting over-voltage protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203135432U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106486997A (en) * | 2016-10-26 | 2017-03-08 | 安徽巨森电器有限公司 | A kind of Intelligent resonance suppression device |
-
2013
- 2013-03-25 CN CN 201320135946 patent/CN203135432U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106486997A (en) * | 2016-10-26 | 2017-03-08 | 安徽巨森电器有限公司 | A kind of Intelligent resonance suppression device |
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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: 20130814 Termination date: 20150325 |
|
| EXPY | Termination of patent right or utility model |