CN202159624U - Protection device for vacuum arc extinguishing chamber by auto-control energy transferring and auto-separation in case of degradation - Google Patents
Protection device for vacuum arc extinguishing chamber by auto-control energy transferring and auto-separation in case of degradation Download PDFInfo
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- CN202159624U CN202159624U CN2011202403988U CN201120240398U CN202159624U CN 202159624 U CN202159624 U CN 202159624U CN 2011202403988 U CN2011202403988 U CN 2011202403988U CN 201120240398 U CN201120240398 U CN 201120240398U CN 202159624 U CN202159624 U CN 202159624U
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- 230000015556 catabolic process Effects 0.000 title abstract description 6
- 238000006731 degradation reaction Methods 0.000 title abstract 8
- 238000000926 separation method Methods 0.000 title abstract 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000006004 Quartz sand Substances 0.000 claims abstract description 11
- 239000003990 capacitor Substances 0.000 claims abstract description 8
- 230000006866 deterioration Effects 0.000 claims description 32
- 230000001681 protective effect Effects 0.000 claims description 11
- 229910000743 fusible alloy Inorganic materials 0.000 claims description 5
- 229910001006 Constantan Inorganic materials 0.000 claims description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 abstract 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000011084 recovery Methods 0.000 description 6
- 230000001012 protector Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 239000011787 zinc oxide Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 2
- 230000009194 climbing Effects 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- 230000001737 promoting effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The utility model relates to a protection device for a vacuum arc extinguishing chamber by auto-control energy transferring and auto-separation in case of degradation, comprising a degradation automation offline apparatus TQ and an energy shift element R1, which are serially connected. An R-C loop is connected with two ends of the energy shift element R1 in parallel. A resistor R in the R-C loop is serially connected with a capacitor C. The degradation automation offline apparatus TQ comprises a shell. The shell is internally provided with a fuse wire and filled with quartz sand. The centre of the upper part of the shell is a cavity provided with a post-degradation offline indicator and a pre-pressing spring. The post-degradation offline indicator and the pre-pressing spring are sealed in the cavity; the lower end of the fuse wire is linked with a second electrode; and the upper end is coupled to the post-degradation offline indicator after passing through the pre-pressing spring. A first electrode is arranged on the upper part of the shell; and a lead of the first electrode is embedded in the quartz sand. While reducing the reigniting rate of the vacuum breaker, the protection device for vacuum arc extinguishing chamber by auto-control energy transferring and auto-separation in case of degradation disclosed by the utility model can also reduce the reigniting overvoltage, the intercepting overvoltage and the three-phase synchronous on/off overvoltage, and protect not only the arc extinguishing chamber of the vacuum breaker, but also other electrical apparatuses.
Description
Technical field
The utility model relates to the protective device of power switchgear, provides the restriction Overvoltage of Vacuum Disconnectors in Operation of the following intermediate voltage electric power system of a kind of 35kV and the protective device that vacuum interrupter is restriked in particular.
Technical background
Plurality of advantages such as maintenance workload is little because vacuum circuit-breaker has, breaking capacity is big, long service life, suitable frequent operation have replaced other type of switch gradually in electric power system, obtained using widely.But; In practical application, also cause showing great attention to of people; Because of vacuum circuit-breaker is damming, restriking or three-phase can produce switching overvoltage when breaking off, thereby cause the insulation breakdown of equipment such as motor, alternate flashover; Serious threat brings significant impact to the insulation of electric equipments such as transformer, motor, capacitor, reactor to safety in production.
Because when vacuum circuit-breaker cut-off little electric current, vacuum arc will be extinguished before zero passage, because electric current cut off suddenly, its energy that is stranded in the inductance winding such as motor must change electric field energy into to the stray capacitance charging of winding.For motor and transformer, particularly zero load or capacity hour, then be equivalent to a big inductance, and the tank capacitance amount is less, therefore can produces big overvoltage, more dangerous when particularly cut-offfing unloaded transformer.
Owing to repeatedly restrike be by contact fracture bang wear, power supply repeatedly to motor electric capacity charge etc. occur repeatedly cause, if opening apart from big inadequately between contact will make to puncture between the arc gap, the recovery voltage of circuit breaker will raise.If it is big inadequately that clearance between open contacts increases, will take place to restrike for the second time, again arc extinguishing; Restrike again so that phenomenon take place repeatedly to restrike, repeatedly discharge and recharge vibration, the recovery voltage between contact raises step by step; The voltage of load end also constantly raises, and causes the generation overvoltage of repeatedly restriking, and damages electric equipment.The damage that experiment showed, motor turn-to-turn insulation mainly is that the voltage that causes raises step by step and causes because vacuum circuit-breaker is repeatedly restriked, and the arc reignition overvoltage of amplitude particularly very easily takes place when cutting off the starting current of motor.
It is because circuit breaker at first cut-offs the phase arc gap produces when restriking that three-phase cut-offs overvoltage simultaneously; The high-frequency current that flows through this phase arc gap causes the rapid zero passage of power current in all the other two phase arc gaps; Cause not cut-off mutually and be cut off thereupon; In other two-phase arc gap, produce the similar phenomenon of damming, thereby produce higher switching overvoltage, in cut-offfing, occur three-phase under small-capacity motor or the light load condition easily and cut-off overvoltage simultaneously than levels.
We know that the basic principle of overvoltage protection is: manage the superpotential electromagnetic energy of formation is released or consumed, to reach the purpose that weakens the overvoltage energy.Usually it is main to address the above problem approach: the one, popularize at present various lightning arresters and the three phase combined over-voltage protector that uses, and all are amplitudes of utilizing the residual voltage of ZnO resistors to come over-voltage, but only limited amplitude and can not limit frequency; Can't effectively protect electric equipment; And because the response speed of zinc oxide relation, superpotential wave head is steep more, then the residual voltage of zinc oxide valve plate high more (will exceeding 20 ~ 35% under the residual voltage ratio switching impulse current under the steep impulse current); This make between the withstand voltage with motor cooperate very difficult; Dam and the overvoltage of restriking is similar to steep wave, compole is short during wave head, less than 1 μ S; Can make various lightning arresters and three phase combined over-voltage protector under the overvoltage of high steepness, be difficult to protect effectively electric equipment; Two improve structure of contact terminals and improve arc control device vacuum degree, make be the arc control device dynamic/static contact just the withstand voltage level separately the time be lower than the recovery voltage between two contacts.Conventional way is to take to improve just to have begun the speed opened, adds the big contact distance, improves measures such as arc control device vacuum degree.When recovery voltage was too high, vacuum then might be at the outdoor generation edge flashing of vacuum extinction if voltage is not restriked in the arc control device.Old friends take to strengthen measures such as creepage distance usually on the circuit breaker surface. and practice shows: the method that adopts " reinforced insulation " in the vacuum extinction indoor and outdoor; The flashover rate of restriking in the chamber of arc control device when vacuum circuit-breaker cut-offs outside rate and the chamber is still higher, and accident happens occasionally; Above scheme exists all that residual voltage is too high, protection is unreasonable, protection is unstable, and a series of technical problems such as the automatic exit function of no deterioration have been buried hidden danger to electric power netting safe running.
Solve the problem of restriking of Overvoltage of Vacuum Disconnectors in Operation and arc control device, become the problem that vacuum circuit-breaker presses for solution of promoting the use of.
The utility model content
The technical problem underlying that the utility model will solve: the Overvoltage of Vacuum Disconnectors in Operation that effectively prevents to use in the following medium voltage network of 35kV and reduce the breaker vacuum arc control device rate technical problem of restriking.For solving the weak point that existing protected mode exists; The utility model provide a kind of automatic control move can, deterioration is from breaking away from and the protective device of vacuum interrupter; It is when the reduction vacuum circuit-breaker is restriked rate; Also can reduce the overvoltage of restriking, cut-off overvoltage and three-phase and cut-off overvoltage simultaneously, not only can protect the vacuum circuit-breaker arc control device, also protect other electric equipment.
The technical scheme of the utility model for realizing that above-mentioned purpose is taked: a kind of automatic control move can, deterioration is from breaking away from and the protective device of vacuum interrupter, comprises the automatic off-line device of deterioration TQ and move can element R1, both series connection; Said moving can element R1 two ends parallel connection R-C loop, the resistor R in the said R-C loop and capacitor C series connection.
The automatic off-line device of said deterioration TQ comprises shell, is provided with fuse and filling quartz sand in the said shell, and shell upper central authorities are cavity; Establish off-line indicating device and pre-compacted spring after the deterioration in the said cavity; Both are sealed in the cavity, and the lower end of said fuse connects second electrode, the upper end pass behind the pre-compacted spring with deterioration after the off-line indicating device connect; Said shell upper is established first electrode, and its lead-in wire is embedded in the quartz sand.
Said fuse adopts nickel wire or constantan wire, and its part in being in quartz sand is established the low-melting alloy plumb joint.
Said resistor R is a linear resistor, value 90 ~ 110 Ω; Said capacitor C value 0.1 ~ 0.2 μ F;
Said moving can element R1 be nonlinear resistor, 2mS square wave discharge capacity 400 ~ 800A.
The beneficial effect of the utility model:This device is used with the three phase combined over-voltage protector of three-phase four star connections of popularizing; Effect is splendid; Can receive following benefit: 1. can increase the discharge capacity of the three phase combined over-voltage protector that uses in the original system, 2. can solve various lightning arresters and three phase combined over-voltage protector are difficult to protect effectively electric equipment under the overvoltage of high steepness problem effectively.3. can possess the function that logs off automatically after the fault so that the no deterioration of using in the original system withdraws from the three phase combined over-voltage protection of ability.This device is when the reduction vacuum circuit-breaker is restriked rate; Also just greatly reduce the overvoltage of restriking, cut-off overvoltage and three-phase and cut-off overvoltage simultaneously, not only protected the vacuum circuit-breaker arc control device, also protected other electric equipment; Has multi-faceted defencive function; The protection effect is remarkable, and exquisite composition is treated both principal and secondary aspect of disease.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is that the electric single line in actual use of the utility model connects sketch map;
Fig. 2 is the automatic off-line device of a deterioration structural representation;
Fig. 3 is the automatic off-line device of deterioration ejects indicating device after deterioration an effect sketch map.
Embodiment
Referring to Fig. 1-3, the utility model comprises the automatic off-line device of deterioration TQ and moves ability element R1, both series connection; Moving can element R1 two ends parallel connection R-C loop, the resistor R in the said R-C loop and capacitor C series connection.
The automatic off-line device of deterioration TQ one end links to each other with vacuum circuit-breaker DL upper contact head, and the other end is connected with moving ability element R1, moves the following contact that the ability element R1 other end is connected to circuit breaker DL.Moving element R1 to be nonlinear resistance, 2mS square wave discharge capacity 400 ~ 800A, and value 800A in this example, discharge capacity is big, non linear coefficient good.In the R-C loop, resistor R is a linear resistor, gets 90 ~ 110 Ω, value 100 Ω in this example; Effect is to increase attenuation coefficient, consumes higher-order of oscillation electric energy, capacitor C value 0.1 ~ 0.2 μ F, value 0.1 μ F in this example; Its effect can reduce wave impedance, can slow down superpotential wave steepness, slows down the climbing of recovery voltage; Reduced the electric potential gradient of the turn-to-turn of inductive load, made when restriking high-frequency current, decayed to when enough big by exponential damping; The power frequency that occurs in the time of can eliminating the high-frequency current zero passage of restriking continues arc, helps reducing arc reignition, and this is that present all kinds of lightning arrester can't be accomplished.The automatic off-line device of deterioration TQ makes to log off automatically after the protective device deterioration, guarantees the safety of power network.
Shown in Figure 21 is the automatic off-line device of deterioration TQ, and it comprises shell 7, is provided with fuse 4 and filling quartz sand 2 in the shell 7; The middle position on shell 7 tops is a cavity 6, wherein establishes off-line indicating device 1 and pre-compacted spring 5 after the deterioration, and both are sealed in the cavity 6; The lower end of fuse 4 connects second electrode 9; Off-line indicating device 1 connected after pre-compacted spring 5 back and deterioration were passed in the upper end, and first electrode 8 is established on shell 7 tops, and its lead-in wire is embedded in the quartz sand 2.Fuse 4 adopts nickel wire or constantan wire, and it establishes low-melting alloy plumb joint 3 in the part that is in quartzy 2.Off-line indicating device 1 ejection indicating section is red after the deterioration, is convenient to observe, and quartz sand 2 can put out electric arc fast behind fuse failure.When low-melting alloy weldering weld temperature reaches about 200 ℃; 3 fusings of low-melting alloy plumb joint; Off-line indicating device 1 is realized rapidly isolating with system under the active force of pre-compacted spring 5 after the deterioration, and informs the operations staff through 1 ejection of off-line indicating device after the deterioration.
The utility model is attempted by circuit breaker main contact two ends in actual use, and the overvoltage electromagnetic energy that will form on the one hand amplitude, high-frequency, high steepness is released fast or consumed; Reduce the climbing and the peak value of recovery voltage between contacts for vacuum-break switches on the other hand greatly, more advanced, more reasonably protect the arc control device of electric equipment and vacuum circuit-breaker.The utility model has designed the automatic off-line device of deterioration TQ, makes protective device possess self-protection function and fault indication function, and red disengaging cap ejects after deterioration more intuitively informs the operations staff.The utility model protection effect is remarkable, and exquisite composition is treated both principal and secondary aspect of disease, and is simple in structure, easy for installation, do not take up space.
Obviously those skilled in the art can do various changes and distortion to the utility model technology; And do not break away from the spirit and the scope of the utility model; Like this; If these modifications of the utility model and distortion belong within the utility model claim and the equivalent technologies scope thereof, then the utility model is also intentional comprises these changes interior.
Claims (4)
- An automatic control move can, deterioration is from breaking away from and the protective device of vacuum interrupter, it is characterized in that: this device comprises the automatic off-line device of deterioration TQ and move can element R1, both series connection; Said moving can element R1 two ends parallel connection R-C loop, the resistor R in the said R-C loop and capacitor C series connection.
- 2. automatic control according to claim 1 move can, deterioration is from breaking away from and the protective device of vacuum interrupter; It is characterized in that: the automatic off-line device of said deterioration TQ comprises shell (7); Be provided with fuse (4) and filling quartz sand (2) in the said shell (7); The middle position on shell (7) top is cavity (6), establishes off-line indicating device (1) and pre-compacted spring (5) after the deterioration in the said cavity (6), and both are sealed in the cavity (6); The lower end of said fuse (4) connects second electrode (9); Off-line indicating device (1) connected after pre-compacted spring (5) back and deterioration were passed in the upper end, and first electrode (8) is established on said shell (7) top, and its lead-in wire is embedded in the quartz sand (2).
- 3. automatic control according to claim 2 move can, deterioration is from breaking away from and the protective device of vacuum interrupter, it is characterized in that: said fuse (4) adopts nickel wire or constantan wire, and its part in being in quartz sand (2) is established low-melting alloy plumb joint (3).
- 4. automatic control according to claim 1 move can, deterioration is from breaking away from and the protective device of vacuum interrupter, it is characterized in that: said resistor R is a linear resistor, value 90 ~ 110 Ω; Said capacitor C value 0.1 ~ 0.2 μ F; Said moving can element R1 be nonlinear resistance, and 2mS square wave discharge capacity is 400 ~ 800A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202403988U CN202159624U (en) | 2011-07-08 | 2011-07-08 | Protection device for vacuum arc extinguishing chamber by auto-control energy transferring and auto-separation in case of degradation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202403988U CN202159624U (en) | 2011-07-08 | 2011-07-08 | Protection device for vacuum arc extinguishing chamber by auto-control energy transferring and auto-separation in case of degradation |
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| Publication Number | Publication Date |
|---|---|
| CN202159624U true CN202159624U (en) | 2012-03-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202403988U Expired - Lifetime CN202159624U (en) | 2011-07-08 | 2011-07-08 | Protection device for vacuum arc extinguishing chamber by auto-control energy transferring and auto-separation in case of degradation |
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| Country | Link |
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| CN (1) | CN202159624U (en) |
Cited By (1)
| 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 |
-
2011
- 2011-07-08 CN CN2011202403988U patent/CN202159624U/en not_active Expired - Lifetime
Cited By (1)
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Jiang Gubing Inventor before: Wu Yong Inventor before: Jiang Gubing |
|
| ASS | Succession or assignment of patent right |
Free format text: FORMER OWNER: HEFEI KAIGAO ELECTRICAL EQUIPMENT CO.,LTD. Effective date: 20150107 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 230088 HEFEI, ANHUI PROVINCE TO: 230001 HEFEI, ANHUI PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20150107 Address after: 230001, Room 601, building T8, 33 yuan waterfront waterfront, Luyang District, Hefei, Anhui, China Patentee after: Jiang Tao Address before: Acacia road 230088 Hefei city high tech Zone Anhui province No. 28 west room 306 Patentee before: Hefei Kaigao Electrical Equipment Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120307 |