CN201868869U - Combined type large-capacity self-separating overvoltage protector - Google Patents
Combined type large-capacity self-separating overvoltage protector Download PDFInfo
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- CN201868869U CN201868869U CN2010206378069U CN201020637806U CN201868869U CN 201868869 U CN201868869 U CN 201868869U CN 2010206378069 U CN2010206378069 U CN 2010206378069U CN 201020637806 U CN201020637806 U CN 201020637806U CN 201868869 U CN201868869 U CN 201868869U
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- zinc oxide
- oxide valve
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- absorber
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Abstract
The utility model relates to a combined type large-capacity self-separating overvoltage protector comprising four zinc oxide valve sheets FR, wherein one ends of the first, second and third zinc oxide valve sheets FR1, FR2 and FR3 are respectively connected with three-phase ends A, B and C of a protected device; the other ends of the first, second and third zinc oxide valve sheets FR1, FR2 and FR3 are respectively connected with a discharging gap assembly CG in series; the other end of the discharging gap assembly CG is connected with the fourth zinc oxide valve sheet F4 in series; the first, second and third zinc oxide valve sheets FR1, FR2 and FR3 are respectively connected with a resistance-capacitance absorber in parallel, and then the first, second and third zinc oxide valve sheets FR1, FR2 and FR3 as well as a resistance-capacitance absorber are respectively connected between the discharging gap assembly CG and a separating device BK in series; and the separating device BK is connected with the three-phase ends A, B and C of the protected device. The combined type large-capacity self-separating overvoltage protector destroys the condition for generating resonance, thus being beneficial to elimination of resonance overvoltage.
Description
Technical field
The utility model relates to a kind of overvoltage protection device, and especially a kind of combined type is big can be held from breaking away from overvoltage protection device.
Background technology
Existing vacuum circuit-breaker, vacuum contactor have numerous advantages such as simple in structure, that the life-span is long, maintenance workload is little, operating cost is low, are widely used in electric power system.Yet because the arc extinguishing of vacuum circuit-breaker, vacuum contactor is very competent, when closing, cut-offfing inductive loads such as motor and transformer in the pass, be easy to generate cut-off overvoltage, repeatedly restrike overvoltage and three-phase cut-offs overvoltage simultaneously, thereby cause the damage of equipment in the loop.
For limiting this switching overvoltage, generally adopt three phase combined over-voltage protector or rc absorber to come the exhausted source of equipment is protected at present, also played certain effect really.But because of selecting for use improper or selected protection Technical properties of plant not comprehensive, interruption of service happens occasionally.This is because three phase combined over-voltage protector commonly used mainly utilizes znr to have the advantage that through-current capacity is big, response speed is fast and adopts four stars type connection again in addition, makes it have the alternate superpotential function of protection simultaneously.But system occur resonance that ferro resonance (as the PT magnetic saturation), parametric resonance (Throw-back switch, close nonloaded line, transformer etc.) and intermittent arc grounding cause, and non-linear load cause situations such as harmonic wave the time; three phase combined over-voltage protector can only play the over-voltage amplitude, the frequency in can't the change system.When switch when cut-offfing, high frequency oscillation can cause switch repeatedly to be restriked and damage switch, high frequency waves also can disturb electronic equipment simultaneously, even can cause the malfunction and the damage of equipment.Though rc absorber can reduce steepness and resonance frequency that the overvoltage wave head rises, because it is very little and do not have shortcoming such as clear and definite overvoltage Limiting amplitude and do not adopted in a large number to absorb energy.
The utility model content
The purpose of this utility model is to provide the rising steepness of a kind of effective reduction frequency of oscillation and overvoltage wave head, and the combined type that can solve the problem of repeatedly restriking when switch dams is big can be held from breaking away from overvoltage protection device.
For achieving the above object; the utility model has adopted following technical scheme: a kind of combined type is big can be held from breaking away from overvoltage protection device; comprise four zinc oxide valve plate FR; wherein first; two; three zinc oxide valve plate FR1; FR2; the end of FR3 meets the A of protected equipment respectively; B; the C three phase terminals; first; two; three zinc oxide valve plate FR1; FR2; the other end of FR3 is connected with discharging gap assembly CG respectively; the other end of discharging gap assembly CG is connected with the 4th zinc oxide valve plate FR4; the other end ground connection of the 4th zinc oxide valve plate FR4; described first; two; three zinc oxide valve plate FR1; FR2; FR3 is in parallel with rc absorber respectively; after the parallel connection first; two; three zinc oxide valve plate FR1; FR2; FR3 and rc absorber are serially connected in respectively between discharging gap assembly CG and the release unit BK, and release unit BK meets the A of protected equipment; B; the C three phase terminals.
As shown from the above technical solution, the utlity model has rc absorber and can hold the dual-use function of overvoltage protection device greatly, protection more comprehensively.The utility model has reduced on the one hand the rising steepness of wave head effectively, has reduced frequency of oscillation, and it is slow and can't the apparatus insulated problem of general protection to high frequency overvoltage response speed to have solved zinc oxide; When in system higher resonance overvoltage taking place on the other hand,, in electrical network, insert rc absorber suddenly, destroyed resonance and produced condition, help eliminating resonance overvoltage because discharging gap assembly CG punctures.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
A kind of combined type is big can be held from breaking away from overvoltage protection device; comprise four zinc oxide valve plate FR; wherein first; two; three zinc oxide valve plate FR1; FR2; the end of FR3 meets the A of protected equipment respectively; B; the C three phase terminals; first; two; three zinc oxide valve plate FR1; FR2; the other end of FR3 is connected with discharging gap assembly CG respectively; the other end of discharging gap assembly CG is connected with the 4th zinc oxide valve plate FR4; the other end ground connection of the 4th zinc oxide valve plate FR4; described first; two; three zinc oxide valve plate FR1; FR2; FR3 is in parallel with rc absorber respectively; after the parallel connection first; two; three zinc oxide valve plate FR1; FR2; FR3 and rc absorber are serially connected in respectively between discharging gap assembly CG and the release unit BK; release unit BK meets the A of protected equipment; B; the C three phase terminals, as shown in Figure 1.
The utlity model has the rc absorber function: clear and definite residual voltage value is arranged on the one hand, reduced the rising steepness of wave head effectively, reduced frequency of oscillation, solved zinc oxide high frequency overvoltage response speed is not had the apparatus insulated problem of general protection slowly; When in system higher resonance overvoltage taking place on the other hand,, in electrical network, insert capacitor C suddenly, destroyed resonance and produced condition, help eliminating resonance overvoltage because discharging gap assembly CG punctures; The existence of discharging gap assembly CG makes capacitor C provide capacitance current to system; also avoided being subjected to influence of harmonic in the electrical network; so when determining Power Network Neutral, need not to consider the big negative effect that can hold overvoltage protection device capacitance-resistance loop of coincide type.
As shown in Figure 1; described release unit BK comprises first, second and third fuse BK1, BK2, BK3; A, B, the C three phase terminals of the protected equipment of a termination of first, second and third fuse BK1, BK2, BK3; first zinc oxide valve plate FR1 and the rc absorber after another termination parallel connection of the first fuse BK1; second zinc oxide valve plate FR2 and the rc absorber after another termination parallel connection of the second fuse BK2, the 3rd zinc oxide valve plate FR3 and rc absorber after another termination parallel connection of the 3rd fuse BK3.Described discharging gap assembly CG is formed in parallel by first, second, third and fourth discharging gap CG1, CG2, CG3, CG4.Described rc absorber is in series by resistance R and capacitor C.The use of release unit BK suffers under the abnormal voltage effect at this protector, can in time break away from the operation electrical network, and protector self is protected, and the minimizing accident takes place, and has avoided the protector blast and initiation phase fault accident.
As shown in Figure 1, also comprise electromagnetic induction coil, electromagnetic induction coil links to each other with state detector 1 by netting twine, and state detector 1 and backstage communication are provided with display on the state detector 1.The below of described first, second and third fuse BK1, BK2, BK3 is provided with the disengaging slide block, breaks away from the slide block below light isolated component is set, and the light isolated component links to each other with state detector 1.When system had overvoltage to be added on this protector, this protector was by increasing self current drain overvoltage protecting energy equipment.This protector operating current is through the electromagnetic induction coil enter counter.This input signal is isolated through rectification, filtering, photoelectricity, with netting twine current signal line is reached the backstage by the RJ45 interface, and in a single day the backstage receives this signal, at once the result is handled and write down to three road input signals, but the just result of displayed record that pushes button.When the fuse blows of this protector inside; the disengaging slide block of first, second and third fuse BK1, BK2, BK3 is deviate from; shelter from and be arranged at the light isolated component that breaks away from the slide block lower end, reach the backstage by the light isolated component by current signal line, and on the display of state detector 1, show.System's backstage warning device is adopted 485 communication signals, by the signal wire transmits alarm signal.
Claims (6)
1. a combined type breaks away from overvoltage protection device big can the appearance certainly; comprise four zinc oxide valve plate FR; wherein first; two; three zinc oxide valve plate FR1; FR2; the end of FR3 meets the A of protected equipment respectively; B; the C three phase terminals; first; two; three zinc oxide valve plate FR1; FR2; the other end of FR3 is connected with discharging gap assembly CG respectively; the other end of discharging gap assembly CG is connected with the 4th zinc oxide valve plate FR4; the other end ground connection of the 4th zinc oxide valve plate FR4; it is characterized in that: described first; two; three zinc oxide valve plate FR1; FR2; FR3 is in parallel with rc absorber respectively; after the parallel connection first; two; three zinc oxide valve plate FR1; FR2; FR3 and rc absorber are serially connected in respectively between discharging gap assembly CG and the release unit BK, and release unit BK meets the A of protected equipment; B; the C three phase terminals.
2. combined type according to claim 1 is big can be held from breaking away from overvoltage protection device; it is characterized in that: described release unit BK comprises first; two; three fuse BK1; BK2; BK3; first; two; three fuse BK1; BK2; the A of the protected equipment of a termination of BK3; B; the C three phase terminals; first zinc oxide valve plate FR1 and the rc absorber after another termination parallel connection of the first fuse BK1; second zinc oxide valve plate FR2 and the rc absorber after another termination parallel connection of the second fuse BK2, the 3rd zinc oxide valve plate FR3 and rc absorber after another termination parallel connection of the 3rd fuse BK3.
3. combined type according to claim 1 is big can be held from breaking away from overvoltage protection device, and it is characterized in that: described discharging gap assembly CG is formed in parallel by first, second, third and fourth discharging gap CG1, CG2, CG3, CG4.
4. combined type according to claim 2 is big can be held from breaking away from overvoltage protection device, and it is characterized in that: described rc absorber is in series by resistance R and capacitor C.
5. combined type according to claim 1 is big can be held from breaking away from overvoltage protection device; it is characterized in that: also comprise electromagnetic induction coil; electromagnetic induction coil links to each other with state detector (1) by netting twine; state detector (1) and backstage communication, state detector is provided with display on (1).
6. break away from overvoltage protection device certainly big can the appearance according to claim 2 or 5 described combined types; it is characterized in that: the below of described first, second and third fuse BK1, BK2, BK3 is provided with the disengaging slide block; break away from the slide block below light isolated component is set, the light isolated component links to each other with state detector (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206378069U CN201868869U (en) | 2010-12-02 | 2010-12-02 | Combined type large-capacity self-separating overvoltage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206378069U CN201868869U (en) | 2010-12-02 | 2010-12-02 | Combined type large-capacity self-separating overvoltage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201868869U true CN201868869U (en) | 2011-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206378069U Expired - Fee Related CN201868869U (en) | 2010-12-02 | 2010-12-02 | Combined type large-capacity self-separating overvoltage protector |
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| CN (1) | CN201868869U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254735A (en) * | 2011-07-08 | 2011-11-23 | 合肥凯高电气设备有限公司 | Protection device having functions of automatic control, energy moving and degradation self-separation for vacuum arc extinguish chamber |
| CN107394768A (en) * | 2017-08-29 | 2017-11-24 | 安徽三和电力技术有限公司 | The used current segmenting formula voltage protector protection circuit of vacuum circuit breaker |
| CN109193557A (en) * | 2018-09-30 | 2019-01-11 | 上海合凯电力保护设备有限公司 | A kind of self-disengaging three phase combined over-voltage protector with resistance-capacitance absorption device |
| CN110474314A (en) * | 2019-09-03 | 2019-11-19 | 国家电网有限公司 | A kind of shunt capacitor overvoltage absorbing device |
-
2010
- 2010-12-02 CN CN2010206378069U patent/CN201868869U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254735A (en) * | 2011-07-08 | 2011-11-23 | 合肥凯高电气设备有限公司 | Protection device having functions of automatic control, energy moving and degradation self-separation for vacuum arc extinguish chamber |
| CN107394768A (en) * | 2017-08-29 | 2017-11-24 | 安徽三和电力技术有限公司 | The used current segmenting formula voltage protector protection circuit of vacuum circuit breaker |
| CN107394768B (en) * | 2017-08-29 | 2020-04-07 | 安徽三和电力技术有限公司 | Overcurrent sectional type voltage protector protection circuit for vacuum circuit breaker |
| CN109193557A (en) * | 2018-09-30 | 2019-01-11 | 上海合凯电力保护设备有限公司 | A kind of self-disengaging three phase combined over-voltage protector with resistance-capacitance absorption device |
| CN110474314A (en) * | 2019-09-03 | 2019-11-19 | 国家电网有限公司 | A kind of shunt capacitor overvoltage absorbing 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: 20110615 Termination date: 20131202 |