CN204517399U - Low residual voltage interstitial structure zinc oxide arrester arranged side by side - Google Patents
Low residual voltage interstitial structure zinc oxide arrester arranged side by side Download PDFInfo
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- CN204517399U CN204517399U CN201520231325.0U CN201520231325U CN204517399U CN 204517399 U CN204517399 U CN 204517399U CN 201520231325 U CN201520231325 U CN 201520231325U CN 204517399 U CN204517399 U CN 204517399U
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Abstract
The utility model discloses a kind of low residual voltage interstitial structure zinc oxide arrester arranged side by side.It comprises energy absorption section valve block group (1) and safe operation section valve block group (2) of connecting in housing, and discharging gap (3), particularly housing is made up of base (5) and the insulating case on it (7), energy absorption section valve block group (1) is placed in insulating case (7), between safe operation section valve block group (2) and earth terminal (6), series impedance element (4) is placed in base (5), and discharging gap (3) is set up in parallel with after safe operation section valve block group (2) of connecting and impedance component (4) parallel connection.It can the overvoltage of upper frequency of right >=1kHz absorb selectively, the life-span of zinc oxide arrester is not only made to obtain prolongation widely, also can not cause damage to the insulation of devices in system, significantly reduce the operation and maintenance cost of system, and rational in infrastructure, be easy to assembling; Can be widely used in the insulation protection of electric power system to equipment.
Description
Technical field
The utility model relates to a kind of zinc oxide arrester, especially a kind of low residual voltage interstitial structure zinc oxide arrester arranged side by side.
Background technology
In electric power system, for protecting various electric equipment from the harm of atmospheric over-voltage or switching overvoltage, be usually connected with zinc oxide arrester (or claiming zinc oxide overvoltage protection device).Along with the operation of system; the insulation level aging reduction gradually of equipment; the weak insulator arrangement that particularly insulation level such as electric rotating machine is natively low; the equipment that these insulation levels are low is difficult to effectively be protected by zinc oxide arrester; its cause is; the zinc oxide valve plate forming various lightning arrester, by the restriction of its physical characteristic, is ensureing under the condition that zinc oxide valve plate normal safe runs, and extremely difficultly its residual voltage is down to a lower level.For addressing this problem, applicant has done some good tries and effort, as the low residual-pressure lightning arrester of one that Chinese utility model patent CN 203456214U announced on February 26th, 2014.This lightning arrester is by the energy absorption section valve block group of series connection and the safe operation section valve block group that are placed in housing, and be parallel to the discharging gap composition at safe operation section valve block group two ends, for ensureing rated voltage and the continuous operating voltage of lightning arrester when normally running, and chargeability when running, make it can safe long-time running; When there is overvoltage; discharging gap in parallel is by safe operation section valve block group short circuit; overvoltage energy is absorbed by energy absorption section valve block group; residual voltage is down to a more satisfactory magnitude of voltage; with the weak insulator arrangement in the aging and protection system of relieving system insulation; after having served as loss of voltage, discharging gap in parallel is opened, and lightning arrester recovers normal and runs.Though this lightning arrester Absorbable rod overvoltage is to the impact of protected equipment, there is shortcoming part also, first, because of the various overvoltage of Long-term absorption, particularly to the absorption of the wider power-frequency overvoltage of fabric width, make very easily too early aging of energy absorption section valve block group wherein, or when absorbing the power-frequency overvoltage of wide fabric width, thermal runaway damage occurs because its energy is excessive, thus make lightning arrester lose effect, can not effectively protect the electric equipment in system again; Secondly, assembling inconvenience.
Utility model content
The technical problems to be solved in the utility model for overcoming shortcoming part of the prior art, provide a kind of can carry out selective absorbing to the overvoltage of upper frequency and be convenient to assemble low residual voltage interstitial structure zinc oxide arrester arranged side by side.
For solving technical problem of the present utility model, the technical scheme adopted is: low residual voltage interstitial structure zinc oxide arrester arranged side by side comprises the energy absorption section valve block group and safe operation section valve block group of connecting in housing, and discharging gap, particularly,
Described housing is made up of the insulating case on base and its;
Described energy absorption section valve block group is placed in insulating case;
Between described safe operation section valve block group and earth terminal, series impedance element is placed in base, described discharging gap is set up in parallel with after the safe operation section valve block group of connecting and impedance component parallel connection, for the short circuit safe operation section valve block group as superpotential frequency >=1kHz and impedance component.
Further improvement as low residual voltage interstitial structure arranged side by side zinc oxide arrester:
Preferably, the safe operation section valve block group of series connection and the operating value of impedor residual voltage value >=discharging gap; Consequent residual voltage value fluctuation is minimum, is beneficial to the insulation of proterctive equipment and the ageing of insulation of relieving system.
Preferably, impedance component is resistor, or inductor.
Relative to the beneficial effect of prior art be:
One, after adopting such structure, the overvoltage of the utility model only upper frequency of right >=1kHz absorbs selectively, and the overvoltage to other frequency, mainly power-frequency overvoltage is then born by equipment.This is substantially identical with the probability that power-frequency overvoltage occurs based on high frequency overvoltage, and the superpotential peak value of high frequency is high, fabric width is narrow, though and the fabric width of power-frequency overvoltage is wider, but peak value is low, the insulation of equipment under high frequency overvoltage very easily by instantaneous breakdown, and the feature that its dielectric strength can sustain completely under power-frequency overvoltage, zinc oxide arrester and protected equipment is adopted rationally to share the superpotential technical scheme of different frequency targetedly, the life-span of zinc oxide arrester is not only made to obtain prolongation widely, also can not cause damage to the insulation of devices in system, significantly reduce the operation and maintenance cost of system.
Its two, rational in infrastructure, be easy to assembling, particularly electrical wiring is more convenient, quick.
Accompanying drawing explanation
Fig. 1 is a kind of basic structure generalized section of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, optimal way of the present utility model is described in further detail.
See Fig. 1, being constructed as follows of low residual voltage interstitial structure zinc oxide arrester arranged side by side:
Energy absorption section valve block group 1 and the safe operation section valve block group 2 of series connection is equipped with in housing, and discharging gap 3.Wherein,
Housing is made up of base 5 and the insulating case 7 on it.
Energy absorption section valve block group 1 is placed in insulating case 7, and its other end is electrically connected with HV Terminal 8.
Between safe operation section valve block group 2 and earth terminal 6, series impedance element 4 is placed in base 5; The safe operation section valve block group 2 of series connection and the residual voltage value of impedance component 4 equal the operating value of discharging gap 3, and impedance component 4 is resistor (or inductor).
Discharging gap 3 is set up in parallel with after the safe operation section valve block group 2 of connecting and impedance component 4 parallel connection.
Energy absorption section valve block group 1 in the utility model adopts the large through-current capacity zinc oxide valve plate of major diameter, to obtain a lower residual voltage ratio.The safe operation section valve block group 2 of series connection and impedance component 4, when normal operation, safe operation section valve block group 2 ensure that rated voltage of the present utility model and continuous operating voltage, and chargeability when running, and ensure that the long-time running of its safety.
During use, only need the electric pressure be first applied in electric power system according to the utility model to carry out the electric parameter of selected each components and parts, the resistance value as the resistor when the utility model is used for 10kV electric pressure is 0.5 Ω (or the inductance value of inductor is 15 μ H); Again by the corresponding phase of HV Terminal 8 of the present utility model and electric power system, earth terminal 6 be electrically connected.
When the overvoltage of frequency >=1kHz is come interim, based on the high frequency characteristics of resistor (or inductor), the safe operation section valve block group 2 of series connection and the residual voltage value of impedance component 4 are much larger than the operating value of discharging gap 3, force discharging gap 3 transient switching, by safe operation section valve block group 2 and impedance component 4 short circuit, only absorb overvoltage energy by energy absorption section valve block group 1, and residual voltage value is down to a more satisfactory magnitude of voltage, ensure that each equipment in system, the safe operation of especially weak insulator arrangement.After having served as loss of voltage, discharging gap 3 disconnects voluntarily, and the utility model recovers normal and runs.
Obviously, those skilled in the art can carry out various change and modification to low residual voltage of the present utility model interstitial structure arranged side by side zinc oxide arrester and not depart from spirit and scope of the present utility model.Like this, if belong within the scope of the utility model claim and equivalent technologies thereof to these amendments of the present utility model and modification, then the utility model is also intended to comprise these change and modification.
Claims (3)
1. a low residual voltage interstitial structure zinc oxide arrester arranged side by side, comprises energy absorption section valve block group (1) and safe operation section valve block group (2) of connecting in housing, and discharging gap (3), it is characterized in that:
Described housing is made up of base (5) and the insulating case on it (7);
Described energy absorption section valve block group (1) is placed in insulating case (7);
Between described safe operation section valve block group (2) and earth terminal (6), series impedance element (4) is placed in base (5), described discharging gap (3) is set up in parallel with after safe operation section valve block group (2) of connecting and impedance component (4) parallel connection, for short circuit safe operation section valve block group (2) and impedance component (4) as superpotential frequency >=1kHz.
2. low residual voltage according to claim 1 interstitial structure zinc oxide arrester arranged side by side, is characterized in that the operating value of the residual voltage value >=discharging gap (3) of safe operation section valve block group (2) and the impedance component (4) of connecting.
3. low residual voltage according to claim 1 interstitial structure zinc oxide arrester arranged side by side, is characterized in that impedance component (4) is resistor, or inductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520231325.0U CN204517399U (en) | 2015-04-16 | 2015-04-16 | Low residual voltage interstitial structure zinc oxide arrester arranged side by side |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520231325.0U CN204517399U (en) | 2015-04-16 | 2015-04-16 | Low residual voltage interstitial structure zinc oxide arrester arranged side by side |
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| CN204517399U true CN204517399U (en) | 2015-07-29 |
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| CN201520231325.0U Active CN204517399U (en) | 2015-04-16 | 2015-04-16 | Low residual voltage interstitial structure zinc oxide arrester arranged side by side |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112951530A (en) * | 2021-03-29 | 2021-06-11 | 北京交通大学 | Aging-resistant composite arrester with gap for electric locomotive and motor train unit |
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2015
- 2015-04-16 CN CN201520231325.0U patent/CN204517399U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112951530A (en) * | 2021-03-29 | 2021-06-11 | 北京交通大学 | Aging-resistant composite arrester with gap for electric locomotive and motor train unit |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Yonghe Road, high tech Development Zone, Hefei city of Anhui Province, No. 99 230031 Patentee after: Anhui electric technology Limited by Share Ltd Address before: Yonghe Road, high tech Development Zone, Hefei city of Anhui Province, No. 99 230031 Patentee before: Anhui Yitian Electrical Technology Co., Ltd. |
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| CP01 | Change in the name or title of a patent holder |