CN105048436A - Protection device for preventing high voltage from entering secondary equipment in series - Google Patents
Protection device for preventing high voltage from entering secondary equipment in series Download PDFInfo
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- CN105048436A CN105048436A CN201510527946.8A CN201510527946A CN105048436A CN 105048436 A CN105048436 A CN 105048436A CN 201510527946 A CN201510527946 A CN 201510527946A CN 105048436 A CN105048436 A CN 105048436A
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- display device
- charged display
- out terminal
- induced voltage
- voltage
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Abstract
The invention provides a protection device for preventing high voltage from entering secondary equipment in series. The protection device comprises an insulated support post and a charged display device, wherein an induced voltage lead-out terminal is arranged at the lower end of the insulated support post, and is connected to the charged display device through a lead; an overvoltage breakdown fuse is arranged between the induced voltage lead-out terminal and the charged display device in parallel; and the overvoltage breakdown fuse is filled with the materials such as semi-insulating zinc dioxide and silicon dioxide in a pressing manner. According to the protection device, the safety of the charged display device and related secondary equipment is protected; a fault area is restricted; the time for exchanging equipment in a power failure is shortened; and reliable operation of power grid equipment is ensured.
Description
Technical field
The present invention relates to a kind of protective device, more particularly relate to a kind of protective device preventing high pressure from sealing in secondary device.
Background technology
Current electric power development is rapid; grid condition is complicated; in order to prevent operations staff when operation maintenance; prevent from touching charging equipment by mistake; usually the earth terminal (lower end) of the feeder line insulation column of 35kV high-voltage board is arranged induced voltage terminal, whether charged by electrification display slotted line terminal, remind operations staff or carry out electric-magnetic lock; prevent personnel forward (FWD) electricity interval by mistake, protection personal security.Because electrification display can only be used for the voltage measuring below 200V, can not withstand high pressures, so will prevent high pressure from scurrying into electrification display, prevent from being burnt.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the invention provides a kind of protective device preventing high pressure from sealing in secondary device.
The present invention is achieved through the following technical solutions: a kind of protective device preventing high pressure from sealing in secondary device; comprise insulation column and charged display device; insulation column lower end arranges induced voltage leading-out terminal; induced voltage leading-out terminal is wired on charged display device, is parallel with over-voltage breakdown and insures between described induced voltage leading-out terminal and charged display device.
In such scheme, the inner compacting by materials such as semi-insulating zinc oxide, silicon dioxide of described over-voltage breakdown insurance is filled.
A kind of beneficial effect preventing high pressure from sealing in the protective device of secondary device of the present invention is:
1, prevent because system high pressure (switching overvoltage, thunderbolt), insulator damage or in filthy, the situation such as there was dampness in the air, insulation column voltage extracting terminal screw place induced voltage exceedes the withstand voltage of charged display device and causes charged display device to burn, thus the external power failure caused because of more exchange device;
2, improve the safe and reliable operation of converting equipment.
Accompanying drawing explanation
Accompanying drawing is that the present invention prevents high pressure from sealing in the protective device electrical schematic diagram of secondary device.
In figure: 1. insulation column, 2. charged display device, 3. over-voltage breakdown insurance, 4. induced voltage leading-out terminal.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the protective device that the present invention prevents high pressure from sealing in secondary device is further described:
Accompanying drawing is that the present invention prevents high pressure from sealing in the protective device electrical schematic diagram of secondary device; in figure; this protective device preventing high pressure from sealing in secondary device comprises insulation column 1 and charged display device 2; insulation column 1 lower end arranges induced voltage leading-out terminal 4; induced voltage leading-out terminal 4 is wired on charged display device 2, is parallel with over-voltage breakdown and insures 3 between induced voltage leading-out terminal 4 and charged display device 2.Over-voltage breakdown is insured 3 inside and is suppressed filling by materials such as semi-insulating zinc oxide, silicon dioxide.
Over-voltage breakdown insurance 3 is installed additional at the induced voltage leading-out terminal 4 place secondary of insulation column 1; namely; at induced voltage leading-out terminal 4 place of insulation column 1, a 220V over-voltage breakdown in parallel with between switch-cabinet grounding insures 3; after the secondary connection going to charged display device is connected on breakdown fuse secondary circuit; like this when induced voltage leading-out terminal 4 place's abnormal pressure; over-voltage breakdown insures 3 actions; induced voltage leading-out terminal 4 place voltage is dropped to zero rapidly; its operate time is less than 0.2S, just can be effectively protected at the charged display device 2 accessed thereafter.
Above-mentioned use over-voltage breakdown insurance is different from conventional protective tube, and be equivalent to a lightning arrester, inside is suppressed by materials such as semi-insulating zinc oxide, silicon dioxide to fill, by voltage levels setting packing material height, during normal voltage, breakdown fuse resistance is infinitely great, when voltage exceedes setting breakdown voltage value, inserts transient switching, resistance is equivalent to 0 Ω, so that voltage drop is to 0V.This packing material puncturing material is after puncturing, and when voltage returns is to normal value, resistance can return to infinity again, and breakdown fuse can Reusability.Observe for the ease of making an inspection tour, breakdown fuse should be loaded on the nearer position of distance inspection hole simultaneously.
Support high pressure ABC three-phase wire under normal circumstances by high-voltage insulation strut 1, U1 is 10kV voltage, induced voltage leading-out terminal 4 is induced voltage U2, U1/U2 is a fixed proportion coefficient, that is to say that the voltage U 2 of induced voltage leading-out terminal 4 is direct under normal circumstances receives on charged display device 2 by secondary wiring, whether to show ABC three-phase wire with high pressure, in order to prevent because insulation column 1 is because of abnormal pressure (thunder and lightning, operate high voltage etc.) and its surface filth, there was dampness in the air, cause for quality own causes the abnormal change of the voltage U 2 of induced voltage leading-out terminal 4 large, burn charged display device 2, in between charged display device 2, over-voltage breakdown insurance 3 is installed at the induced voltage leading-out terminal 4 of high-voltage insulation strut 1, instantaneous under abnormal pressure high pressure is dropped to 0V, the safety of protection charged display device 2 and secondary relevant device.
By facts have proved, the present invention's invention reaches protection charged display device and the safety of secondary relevant device, limits fault zone, shortens the time of the more exchange device of having a power failure, ensure that the reliability service of grid equipment.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, when the method and technology contents that can utilize above-mentioned announcement are made a little change or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, still belong in the scope of technical solution of the present invention.
Claims (2)
1. the protective device preventing high pressure from sealing in secondary device; comprise insulation column and charged display device; insulation column lower end arranges induced voltage leading-out terminal; induced voltage leading-out terminal is wired on charged display device, it is characterized in that: be parallel with over-voltage breakdown between described induced voltage leading-out terminal and charged display device and insure.
2. a kind of protective device preventing high pressure from sealing in secondary device as claimed in claim 1, is characterized in that: the inner compacting by materials such as semi-insulating zinc oxide, silicon dioxide of described over-voltage breakdown insurance is filled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510527946.8A CN105048436A (en) | 2015-08-25 | 2015-08-25 | Protection device for preventing high voltage from entering secondary equipment in series |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510527946.8A CN105048436A (en) | 2015-08-25 | 2015-08-25 | Protection device for preventing high voltage from entering secondary equipment in series |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105048436A true CN105048436A (en) | 2015-11-11 |
Family
ID=54454761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510527946.8A Pending CN105048436A (en) | 2015-08-25 | 2015-08-25 | Protection device for preventing high voltage from entering secondary equipment in series |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105048436A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110196345A (en) * | 2019-07-09 | 2019-09-03 | 国网宁夏电力有限公司宁东供电公司 | Voltage transformer secondary neutral point protecting device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008206263A (en) * | 2007-02-19 | 2008-09-04 | Sankosha Corp | Surge protection device and surge protector using same |
| CN202393816U (en) * | 2011-11-15 | 2012-08-22 | 新疆特变电工自控设备有限公司 | High-voltage electrified display device |
| CN103872582A (en) * | 2012-12-14 | 2014-06-18 | 上海明科电气有限公司 | Breakdown protector |
| CN204131102U (en) * | 2014-04-21 | 2015-01-28 | 许炎章 | The high-voltage electriferous display locking device that security performance is good |
-
2015
- 2015-08-25 CN CN201510527946.8A patent/CN105048436A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008206263A (en) * | 2007-02-19 | 2008-09-04 | Sankosha Corp | Surge protection device and surge protector using same |
| CN202393816U (en) * | 2011-11-15 | 2012-08-22 | 新疆特变电工自控设备有限公司 | High-voltage electrified display device |
| CN103872582A (en) * | 2012-12-14 | 2014-06-18 | 上海明科电气有限公司 | Breakdown protector |
| CN204131102U (en) * | 2014-04-21 | 2015-01-28 | 许炎章 | The high-voltage electriferous display locking device that security performance is good |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110196345A (en) * | 2019-07-09 | 2019-09-03 | 国网宁夏电力有限公司宁东供电公司 | Voltage transformer secondary neutral point protecting device |
| CN110196345B (en) * | 2019-07-09 | 2024-06-04 | 国网宁夏电力有限公司宁东供电公司 | Secondary neutral point protection device of voltage transformer |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151111 |