CN204029703U - A kind of power distribution cabinet with vacuum degree measurement function - Google Patents
A kind of power distribution cabinet with vacuum degree measurement function Download PDFInfo
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- CN204029703U CN204029703U CN201420478274.7U CN201420478274U CN204029703U CN 204029703 U CN204029703 U CN 204029703U CN 201420478274 U CN201420478274 U CN 201420478274U CN 204029703 U CN204029703 U CN 204029703U
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Abstract
The utility model discloses a kind of power distribution cabinet with vacuum degree measurement function, comprise the vacuum circuit-breaker be arranged in power distribution cabinet, vacuum circuit-breaker comprises 3 vacuum interrupters, each vacuum interrupter is arranged with contact arm and lower contact arm in parallel, the arm head of upper contact arm and lower contact arm is connected to moving contact and lower moving contact, each vacuum circuit-breaker also comprises upper static contact and lower fixed contact, 3 groups of upper static contacts and lower fixed contact are separately fixed in power distribution cabinet, upper moving contact and lower moving contact match with upper static contact and lower fixed contact respectively and are flexibly connected, upper moving contact and lower moving contact are linked together by wire and switch, switch successively with current transformer, load connects, vacuum interrupter is also covered with coil groups, coil groups two ends are connected with comparator, comparator is also connected with detection indicator light, the utility model solves the problem that in the power distribution cabinet running existed in prior art, Vacuity of Vacuum Circuit Breakers cannot detect.
Description
Technical field
The utility model belongs to technical field of electric control, is specifically related to a kind of power distribution cabinet with vacuum degree measurement function.
Background technology
In the elements such as the transformer in electric power system in transformer station, circuit or power distribution cabinet, because maintenance changes, operational mode breaks down, and by their accesses or need exit, thus carry out certain operations.Under normal circumstances for completing can reliably connect and cut-off circuit, handover operation can be carried out neatly when changing operational mode, fault current can be excised rapidly when circuit malfunctions, some device for switching must be filled in power system transformer substation or power distribution cabinet.Wherein the task of vacuum circuit-breaker is the most important, status is most important, and its structure is also complicated.The primary structure of vacuum circuit-breaker is made up of vacuum interrupter, operating mechanism and insulated support pedestal etc.When under the effect of dynamic and static contact at operating mechanism during separating brake, electric arc is produced between contact, contact surface at high temperature volatilizes steam, because contact design is special shape, electric current by time produce a magnetic field, electric arc under this magnetic fields along contact surface tangential direction rapid movement, part metals that metallic cylinder has been condensed steam, electric arc has just extinguished when natural zero-crossing, and the dielectric strength between contact is recovered rapidly again.Vacuum circuit-breaker has lot of advantages, so application is a lot of in transformer station.Owing to have employed special vacuum unit, along with the raising of manufacture level in recent years, the fault of arc control device part obviously reduces.Because vacuum interrupter is without the need to overhaul plan, when it damages, can only take to change, disposable products, so, in some applications, judge that whether vacuum interrupter is intact and seem particularly important, vacuum circuit-breaker drop-out current carry out arc extinguishing in vacuum bubbles, and vacuum circuit-breaker itself is not qualitative, the device of Quantitative Monitoring vacuum degree characteristic, so it is hidden failure that vacuum degree reduces fault, its degree of danger is far longer than dominant symbols, when usually accessing vacuum circuit-breaker in power distribution cabinet, if in machine running process, vacuum circuit-breaker is damaged, be difficult to be discovered.
Utility model content
The purpose of this utility model is to provide a kind of power distribution cabinet with vacuum degree measurement function, solves the problem that in the power distribution cabinet running existed in prior art, Vacuity of Vacuum Circuit Breakers cannot detect.
The technical scheme that the utility model adopts is, a kind of power distribution cabinet with vacuum degree measurement function, comprise the vacuum circuit-breaker be arranged in power distribution cabinet, vacuum circuit-breaker comprises 3 vacuum interrupters, each vacuum interrupter is arranged with contact arm and lower contact arm in parallel, the arm head of upper contact arm and lower contact arm is connected to moving contact and lower moving contact, each vacuum circuit-breaker also comprises upper static contact and lower fixed contact, 3 groups of upper static contacts and lower fixed contact are separately fixed in power distribution cabinet, upper moving contact and lower moving contact match with upper static contact and lower fixed contact respectively and are flexibly connected, upper moving contact and lower moving contact are linked together by wire and switch, switch is connected with the current transformer of power distribution cabinet inside, current transformer is also connected with load, vacuum interrupter is also covered with coil groups, coil groups two ends are connected with comparator, comparator is also connected with detection indicator light.
Feature of the present utility model is also,
Coil groups is formed by stacking by multiple interchange relay coil, and voltage is 110V or 220V.
Comparator is LM339 chip.
Detection indicator light is LED.
The beneficial effects of the utility model are, a kind of power distribution cabinet with vacuum degree measurement function, by the vacuum interrupter upper cover coil groups at vacuum circuit-breaker, coil groups serves as magnetic field sensor, once produce magnetic field around vacuum interrupter, so coil groups just can sense, now, result by comparator process, and then is delivered to detection indicator light by induced signal, then detecting indicator light can according to the light and shade change with or without magnetic field.
Accompanying drawing explanation
Fig. 1 is a kind of power distribution cabinet structure chart with vacuum degree measurement function of the utility model;
Fig. 2 is the front view of 3 groups of upper static contacts 7 and lower fixed contact 8 in a kind of power distribution cabinet with vacuum degree measurement function of the utility model;
Fig. 3 is a kind of power distribution cabinet testing circuit figure with vacuum degree measurement function of the utility model.
In figure, 1. power distribution cabinet, 2. vacuum circuit-breaker, 3. go up contact arm, 4. descends contact arm, 5. goes up moving contact, 6. lower moving contact, 7. upper static contact, 8. descend fixed contact, 9. switch, 10. current transformer, 11. vacuum interrupters, 12. coil groups, 13. comparators, 14. detect indicator light, 15. loads.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
A kind of power distribution cabinet with vacuum degree measurement function of the utility model, structure as shown in Figure 1, comprise the vacuum circuit-breaker 2 be arranged in power distribution cabinet 1, vacuum circuit-breaker 2 comprises 3 vacuum interrupters 11, each vacuum interrupter 11 is arranged with contact arm 3 and lower contact arm 4 in parallel, the arm head of upper contact arm 3 and lower contact arm 4 is connected to moving contact 5 and lower moving contact 6, as shown in Figure 2, each vacuum circuit-breaker 2 also comprises upper static contact 7 and lower fixed contact 8, 3 groups of upper static contacts 7 and lower fixed contact 8 are separately fixed in power distribution cabinet 1, upper moving contact 5 and lower moving contact 6 match with upper static contact 7 and lower fixed contact 8 respectively and are flexibly connected, upper moving contact 5 and lower moving contact 6 are linked together by wire and switch 9, switch 9 is connected with the current transformer 10 of power distribution cabinet 1 inside, current transformer 10 is also connected with load 15, each vacuum interrupter 11 is also covered with coil groups 12, each coil groups 12 two ends are all connected with comparator 13, each comparator 13 is also connected with detection indicator light 14.
A kind of power distribution cabinet with vacuum degree measurement function of the utility model, the course of work is as follows, when vacuum circuit-breaker 2 is by closing operation, now, upper moving contact 5 contacts with upper static contact 7, lower moving contact 6 contacts with lower fixed contact 8, current lead-through in whole vacuum circuit-breaker 2, if now turn on-switch 9, then electric current by current transformer 10 and then will arrive follow-up load 15, load 15 is worked, when upper moving contact 5 and lower moving contact 6 are respectively with upper static contact 7 and lower fixed contact 8 under the effect at operating mechanism during separating brake, electric arc is produced between upper moving contact 5 and lower moving contact 6, upper moving contact 5 and lower moving contact 6 surface at high temperature volatilize steam, because upper moving contact 5 and lower moving contact 6 are metallic cylinder or hemispherical, electric current by time can produce a magnetic field, electric arc under this magnetic fields along on moving contact 5 and lower moving contact 6 surface tangent direction rapid movement, now vacuum interrupter 11 surrounding can form magnetic field, thus in arc control device, produce the pulsed magnetic field with Synchronous High voltage, like this, under the effect of impulse magnetic field and highfield, charged ion in arc control device is for the helical movement, and collide with residual gas molecule and ionize, the ionic current produced and residual gas density and vacuum degree are approximated to proportionate relationship, again because vacuum interrupter 11 upper cover has coil groups 12 in this application, as shown in Figure 3, coil groups 12 is that a kind of 110V (also can with 220V) exchanges relay coil, coil groups 12 serves as magnetic field sensor, comparator 13 is chip LM339, detect indicator light 14 for LED detection indicator light.If the vacuum degree in vacuum interrupter 11 is constant, magnetic field so around vacuum interrupter 11 is exactly constant, if the vacuum degree in vacuum interrupter 11 changes a little to some extent, the change of vacuum interrupter 11 surrounding magnetic field will inevitably be caused, once magnetic field changes, so coil groups 12 just can sense, according to Theory of Electromagnetic Field, electric field is produced around the magnetic field of change, electric field makes the free electron displacement in conductor form electric current, the electric current that this situation produces is called induced current or induced current, now, induced signal is processed by comparator 13, and then result is delivered to detection indicator light 14, then detecting indicator light 14 can according to lighting with or without changes of magnetic field or extinguishing, if vacuum interrupter 11 is intact, do not produce the phenomenon of gas leakage, then the vacuum degree of explanation vacuum interrupter 11 is steady state values, so, magnetic field now around vacuum interrupter 11 also would not change, cause coil groups 12 can not produce electric field, detect indicator light 14 also can not light.The magnetic field detection circuit be made up of these components and parts of upper figure, its detection sensitivity is very high, even if there is a little permanent magnet, mobile near coil groups 12, LED also can respond at once (lighting).At circuit under normal circumstances, the i.e. constant existence in magnetic field near vacuum interrupter 11, coil groups 12 two ends, namely comparator 13 6., 7. potential difference is not had between bipod, circuit does not work, as long as when the magnetic field near vacuum interrupter 11 changes, coil groups 12 will produce small AC signal, make two of comparator 13 to compare end and produce potential difference, result, low and high level change is had at its output, detect indicator light 14 and namely can glimmer (LED switches on and off), exist to indicate vicissitudinous magnetic field near coil groups 12, and then illustrate that the vacuum degree in vacuum interrupter 11 changes, can infer that the phenomenon of leaking gas has appearred in vacuum interrupter 11.
A kind of power distribution cabinet with vacuum degree measurement function of the utility model, can judge that whether the vacuum interrupter in vacuum circuit-breaker is intact, vacuum circuit-breaker drop-out current carry out arc extinguishing in vacuum bubbles, avoids in machine running process, vacuum circuit-breaker is damaged, and is difficult to be discovered danger.
Claims (4)
1. one kind has the power distribution cabinet of vacuum degree measurement function, it is characterized in that, comprise the vacuum circuit-breaker (2) be arranged in power distribution cabinet (1), vacuum circuit-breaker (2) comprises 3 vacuum interrupters (11), each vacuum interrupter (11) is arranged with contact arm (3) and lower contact arm (4) in parallel, the arm head of upper contact arm (3) and lower contact arm (4) is connected to moving contact (5) and lower moving contact (6), described each vacuum circuit-breaker (2) also comprises upper static contact (7) and lower fixed contact (8), described 3 groups of upper static contacts (7) and lower fixed contact (8) are separately fixed in power distribution cabinet (1), described upper moving contact (5) and lower moving contact (6) match with upper static contact (7) and lower fixed contact (8) respectively and are flexibly connected, described upper moving contact (5) and lower moving contact (6) are linked together by wire and switch (9), switch (9) is connected with the current transformer (10) of power distribution cabinet (1) inside, current transformer (10) is also connected with load (15), described each vacuum interrupter (11) is also covered with coil groups (12), each coil groups (12) two ends are connected with comparator (13), each comparator (13) is also connected with detection indicator light (14).
2. a kind of power distribution cabinet with vacuum degree measurement function according to claim 1, is characterized in that, described coil groups (12) is formed by stacking by multiple interchange relay coil, and voltage is 110V or 220V.
3. a kind of power distribution cabinet with vacuum degree measurement function according to claim 1, is characterized in that, described comparator (13) is LM339 chip.
4. a kind of power distribution cabinet with vacuum degree measurement function according to claim 1, is characterized in that, described detection indicator light (14) is LED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420478274.7U CN204029703U (en) | 2014-08-22 | 2014-08-22 | A kind of power distribution cabinet with vacuum degree measurement function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420478274.7U CN204029703U (en) | 2014-08-22 | 2014-08-22 | A kind of power distribution cabinet with vacuum degree measurement function |
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| Publication Number | Publication Date |
|---|---|
| CN204029703U true CN204029703U (en) | 2014-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420478274.7U Expired - Fee Related CN204029703U (en) | 2014-08-22 | 2014-08-22 | A kind of power distribution cabinet with vacuum degree measurement function |
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| Country | Link |
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| CN (1) | CN204029703U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116418119A (en) * | 2023-04-25 | 2023-07-11 | 江苏安世朗智能科技有限公司 | Three-phase capacitance intelligent monitoring control system |
-
2014
- 2014-08-22 CN CN201420478274.7U patent/CN204029703U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116418119A (en) * | 2023-04-25 | 2023-07-11 | 江苏安世朗智能科技有限公司 | Three-phase capacitance intelligent monitoring control system |
| CN116418119B (en) * | 2023-04-25 | 2023-12-26 | 江苏安世朗智能科技有限公司 | Three-phase capacitance intelligent monitoring control system |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141217 Termination date: 20160822 |