CN203826925U - Air circuit breaker having electric leakage protection function - Google Patents
Air circuit breaker having electric leakage protection function Download PDFInfo
- Publication number
- CN203826925U CN203826925U CN201420074702.XU CN201420074702U CN203826925U CN 203826925 U CN203826925 U CN 203826925U CN 201420074702 U CN201420074702 U CN 201420074702U CN 203826925 U CN203826925 U CN 203826925U
- Authority
- CN
- China
- Prior art keywords
- circuit
- circuit breaker
- electric leakage
- zero sequence
- delay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model provides an air circuit breaker having an electric leakage protection function. The air circuit breaker comprises a circuit breaker outer shell, wherein an overload short circuit protection module, an electronic tripper and a zero sequence current transformer which is used for detecting electric leakage are arranged in the circuit breaker outer shell; the electronic tripper is connected with the overload short circuit protection module through a linkage rod; the zero sequence current transformer is connected with a signal processing unit; the signal processing unit comprises a current sampling circuit and a time-delay circuit; the current sampling circuit is connected with the zero sequence current transformer; the current sampling circuit is connected with the time-delay circuit, and the time-delay circuit is electrically connected with the electronic tripper. When an electric leakage problem occurs, the air circuit breaker can exert certain time-delay effects, and therefore enough reaction time is provided for an electric leakage quick switch of each branch circuit; thus the air circuit breaker serving as a master switch can be prevented from frequent trip-out problems; unnecessary loss brought by power failure in production processes and an in daily life can be reduced.
Description
Technical field
The utility model relates to a kind of air circuit, particularly a kind of air circuit with overvoltage, under-voltage, overload, short circuit, electric leakage delay protection.
Background technology
Air circuit is a kind of as long as electric current exceedes the switch that rated current will disconnect automatically in circuit, and air circuit is widely used in fields such as industry, business and residential houses.Air circuit is very important a kind of electrical equipment in low voltage power distribution network and electric drive system; it integrates controls and multi-protective function; decapacitation completes outside contact and point deenergizing; the short circuit that still can occur circuit or electric equipment, seriously overload and under voltage etc. are protected; in the time there is electric leakage, overload, short circuit in circuit, air circuit can be within the extremely short time safety of disengagement failure power supply, the protection person and power consumption equipment rapidly.
The supply power mode of circuit is at present: master switch is selected air circuit, each branch switch is selected electric leakage high-speed switch, in the time that electric leakage appears in each shunt, general corresponding electric leakage high-speed switch can disconnect fast, because faulty circuit disconnects, therefore other circuit shunts can not be affected, still can normal power supply.But in actual use; often there will be electric leakage high-speed switch also not disconnect, just first disconnected due to comparatively sensitive as the air circuit of master switch, will make like this general supply power-off; thereby initiation large-area power-cuts, gives and produces or live and bring unnecessary loss.
Utility model content
The shortcoming of prior art in view of the above, the purpose of this utility model is to provide a kind of air circuit in the time there is electric leakage with delay protection function.
For achieving the above object and other relevant objects, the utility model provides a kind of air circuit with creepage protection function, comprise case for circuit breaker, in described case for circuit breaker, be provided with overload short circuit protection module, electronic trip unit, described electronic trip unit is connected with described overload short circuit protection module by trace, in described case for circuit breaker, be also provided with a zero sequence current mutual inductor for detection of electric leakage, described zero sequence current mutual inductor is connected with a signal processing unit, described signal processing unit comprises current sampling circuit, delay circuit, described current sampling circuit is connected with described zero sequence current mutual inductor, described current sampling circuit is connected with described delay circuit, described delay circuit is electrically connected with described electronic trip unit.
Preferably, described signal processing unit also comprises a voltage sampling circuit, and described voltage sampling circuit is electrically connected with described electronic trip unit.
Preferably, described trace is connected with the tripping part of described electronic trip unit.
As mentioned above, air circuit of the present utility model has following beneficial effect: in this air circuit, be provided with zero sequence current mutual inductor, current sampling circuit and delay circuit, whether zero sequence current mutual inductor is for detection of leaking electricity in circuit, in the time there is electric leakage, current sampling circuit can gather leakage current size, in the time that leakage current size reaches setting, start delay circuit work, if leakage current reduces or disappears in delay time, timing stops and carrying out sampling next time; If leakage current does not reduce, after delay time arrives, send and feed back signal to electronic trip unit, then drive the action of overload short circuit protection module that circuit breaker is disconnected by electronic trip unit.This air circuit has certain delay function in the time there is electric leakage, so just can give the enough reaction time of electric leakage high-speed switch of each branch road, therefore just can there is not the problem of Frequent trip in this air circuit as master switch, can reduce the unnecessary loss bringing because of power-off in production, life.
Brief description of the drawings
Fig. 1 is the overall structure schematic diagram of the utility model embodiment.
Fig. 2 is the Split type structure schematic diagram of the utility model embodiment.
Fig. 3 is the internal structure schematic diagram of the utility model embodiment.
Fig. 4 is the circuit connection diagram of the utility model embodiment.
Element numbers explanation.
| 1 | Overload short circuit protection module |
| 2 | Trace |
| 3 | Electronic trip unit |
| 4 | Zero sequence current mutual inductor |
| 5 | Signal processing unit |
| 51 | Current sampling circuit |
| 52 | Delay circuit |
| 53 | Voltage sampling circuit |
| 6 | Shell of circuit breaker |
Embodiment
By particular specific embodiment, execution mode of the present utility model is described below, person skilled in the art scholar can understand other advantages of the present utility model and effect easily by the disclosed content of this specification.
Refer to Fig. 1 to Fig. 3.Notice, appended graphic the illustrated structure of this specification, ratio, size etc., all contents in order to coordinate specification to disclose only, understand and read for person skilled in the art scholar, not in order to limit the enforceable qualifications of the utility model, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the utility model can produce and the object that can reach, all should still drop on the technology contents that the utility model discloses and obtain in the scope that can contain.Simultaneously, in this specification, quote as " on ", the term of D score, " left side ", " right side ", " centre " and " " etc., also only for ease of understanding of narrating, but not in order to limit the enforceable scope of the utility model, the change of its relativeness or adjustment, changing under technology contents, when being also considered as the enforceable category of the utility model without essence.
As shown in Figures 1 to 4; the utility model provides a kind of air circuit with creepage protection function; this air circuit comprises case for circuit breaker 6; in case for circuit breaker 6, be provided with overload short circuit protection module 1, electronic trip unit 3, electronic trip unit 3 is connected with overload short circuit protection module 1 by trace 2.Trace 2 is connected with the tripping part of electronic trip unit 3, in the time of electronic trip unit 3 tripping, can drive trace 2 to move, and then drives overload short circuit protection module 1 to move, and circuit breaker is disconnected.
In case for circuit breaker 6, be also provided with a zero sequence current mutual inductor 4 for detection of electric leakage, power line is through this zero sequence current mutual inductor 4, and zero sequence current mutual inductor 4 can be used for the leakage current of testing circuit.Zero sequence current mutual inductor 4 is connected with signal processing unit 5.Signal processing unit 5 comprises current sampling circuit 51, delay circuit 52, current sampling circuit 51 is connected with zero sequence current mutual inductor 4, current sampling circuit 51 can be used for detecting the size of current that zero sequence current mutual inductor 4 produces, and then judges the size of circuit leakage current.Current sampling circuit 51 is connected with delay circuit 52, and when the size of current detecting when current sampling circuit 51 reaches setting, current sampling circuit 51 drives delay circuit 52 to start time delay clocking capability.Delay circuit 52 is connected with electronic trip unit 3, and when delay circuit 52 timing are during to the stipulated time, delay circuit 52 sends and feeds back signal to electronic trip unit 3, makes electronic trip unit 3 trippings.
In signal processing unit 5, also comprise a voltage sampling circuit 53, voltage sampling circuit 53 is electrically connected by wire with electronic trip unit 3, and voltage sampling circuit 53 is for gathering the voltage signal of power line.The voltage of voltage sampling circuit 53 acquisition circuits; in the time that loop electricity exceeds overvoltage 280+/_ 5%; voltage sampling circuit 53 sends signal to electronic trip unit 3; electronic trip unit 3 drives trace 2; trace 2 drives the tripping mechanism of overload short circuit protection module; thereby cut off the electricity supply, realized over-voltage protecting function.
In this air circuit, be provided with zero sequence current mutual inductor, current sampling circuit and delay circuit, whether zero sequence current mutual inductor is for detection of leaking electricity in circuit, in the time there is electric leakage, current sampling circuit can gather leakage current size, in the time that leakage current size reaches setting, start delay circuit work, if leakage current reduces or disappears in delay time, timing stops and carrying out sampling next time; If leakage current does not reduce, after delay time arrives, send and feed back signal to electronic trip unit, then drive the action of overload short circuit protection module that circuit breaker is disconnected by electronic trip unit.This air circuit has certain delay function in the time there is electric leakage, so just can give the enough reaction time of electric leakage high-speed switch of each branch road, therefore just can there is not the problem of Frequent trip in this air circuit as master switch, can reduce the unnecessary loss bringing because of power-off in production, life.So the utility model has effectively overcome various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting the utility model.Any person skilled in the art scholar all can, under spirit of the present utility model and category, modify or change above-described embodiment.Therefore, have in technical field under such as and conventionally know that the knowledgeable modifies or changes not departing from all equivalences that complete under spirit that the utility model discloses and technological thought, must be contained by claim of the present utility model.
Claims (3)
1. one kind has the air circuit of creepage protection function, comprise case for circuit breaker, in described case for circuit breaker, be provided with overload short circuit protection module, electronic trip unit, described electronic trip unit is connected with described overload short circuit protection module by trace, it is characterized in that: in described case for circuit breaker, be also provided with a zero sequence current mutual inductor for detection of electric leakage, described zero sequence current mutual inductor is connected with a signal processing unit, described signal processing unit comprises current sampling circuit, delay circuit, described current sampling circuit is connected with described zero sequence current mutual inductor, described current sampling circuit is connected with described delay circuit, described delay circuit is electrically connected with described electronic trip unit.
2. the air circuit with creepage protection function according to claim 1, is characterized in that: described signal processing unit also comprises a voltage sampling circuit, described voltage sampling circuit is electrically connected with described electronic trip unit.
3. the air circuit with creepage protection function according to claim 1, is characterized in that: described trace is connected with the tripping part of described electronic trip unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420074702.XU CN203826925U (en) | 2014-02-20 | 2014-02-20 | Air circuit breaker having electric leakage protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420074702.XU CN203826925U (en) | 2014-02-20 | 2014-02-20 | Air circuit breaker having electric leakage protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203826925U true CN203826925U (en) | 2014-09-10 |
Family
ID=51482388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420074702.XU Expired - Fee Related CN203826925U (en) | 2014-02-20 | 2014-02-20 | Air circuit breaker having electric leakage protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203826925U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112751310A (en) * | 2020-12-30 | 2021-05-04 | 浙江德民电气有限公司 | Multifunctional safety socket |
-
2014
- 2014-02-20 CN CN201420074702.XU patent/CN203826925U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112751310A (en) * | 2020-12-30 | 2021-05-04 | 浙江德民电气有限公司 | Multifunctional safety socket |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201945649U (en) | Comprehensive test table for relay protector | |
| CN204361791U (en) | A kind of circuit structure of intelligent low-pressure distribution terminal | |
| CN203826925U (en) | Air circuit breaker having electric leakage protection function | |
| CN201066671Y (en) | Monitoring residual current action protection relay | |
| CN103762557B (en) | The anti-open-circuit-protection method of current transformer | |
| CN203180512U (en) | Low tension side power supply surge protector | |
| CN205123418U (en) | Intelligent distribution box | |
| CN204408004U (en) | Double loop power supply inlet wire switching device shifter | |
| Venkata et al. | Advanced and adaptive protection for active distribution grid | |
| CN203931986U (en) | With the circuit breaker of overvoltage/undervoltage protection and auto-reset function | |
| CN105186457A (en) | Low-voltage motor protection device | |
| CN201877795U (en) | Timed current-limiting protection circuit | |
| CN202258603U (en) | Voltage-sensitive chip and surge protection device including same | |
| CN204089151U (en) | A kind of family with leakage current protection device table case | |
| CN205544190U (en) | Multi -functional power failure protection device that opens circuit | |
| CN205039533U (en) | Line protection measurement and control device | |
| CN204695489U (en) | Multiloop fire detecting arrangement | |
| CN205195233U (en) | Power leakage protector | |
| CN204928074U (en) | Self feed back intelligence earth leakage protection controlling means | |
| CN104009546A (en) | Intelligent controller for intelligent low-voltage circuit breaker | |
| CN203733723U (en) | Electromagnetic anti-thunder leakage circuit breaker | |
| CN204925280U (en) | Electric wire netting equipment trouble detection alarm ware | |
| CN204407861U (en) | A kind of Low-Voltage Leakage Protection | |
| CN204205612U (en) | For the Powerless compensation control box of double power-supply system | |
| CN215498243U (en) | Leakage protection system of block terminal |
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 |
Granted publication date: 20140910 Termination date: 20170220 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |