CN105958451A - Actuator with current limiting effect - Google Patents
Actuator with current limiting effect Download PDFInfo
- Publication number
- CN105958451A CN105958451A CN201610477517.9A CN201610477517A CN105958451A CN 105958451 A CN105958451 A CN 105958451A CN 201610477517 A CN201610477517 A CN 201610477517A CN 105958451 A CN105958451 A CN 105958451A
- Authority
- CN
- China
- Prior art keywords
- measurement
- control unit
- actuator
- isolator
- current limiter
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/041—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using a short-circuiting device
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/042—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage comprising means to limit the absorbed power or indicate damaged over-voltage protection device
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention provides an actuator with a current limiting effect, and relates to the field of circuit safety control. The actuator comprises a fast isolator (A), a special high-voltage current limiter (B), an electronic transformer (C), a measurement and control unit (D), a high-capacity overvoltage absorber (E) and an isolating switch (G), wherein the isolating switch (G), the electronic transformer (C) and the fast isolator (A) are sequentially connected in series; the measurement and control unit (D) detects current signals at two ends of the electronic transformer (C) and is connected with the fast isolator (A); the special high-voltage current limiter (B) is connected with the fast isolator (A) in parallel; and one end of the high-capacity overvoltage absorber (E) is connected with the special high-voltage current limiter (B) and the other end is grounded. The actuator has the characteristics that the action can be quickly and efficiently analyzed, a fault point is cut off, the action time is extremely short and the like.
Description
Technical field
The present invention relates to circuit safety control field, be specifically related to a kind of action device with metering function.
Background technology
In recent years, along with country greatly develops, power industry is also advanced by leaps and bounds, and scale is the most increasing, and the grid-connected connection between different electric power systems is also corresponding, and frequently the failed shorted of outlet also increases, and short trouble impacts whole electrical network, makes electric power safety there is hidden danger.
Summary of the invention
It is an object of the present invention to provide a kind of action device with metering function, it has rapid efficient analysis action, and excises trouble point, the features such as movement time is extremely short.
In order to solve the problem existing for background technology, the present invention is by the following technical solutions: it comprises quick-acting isolator A, Special high-voltage current limiter B, electronic mutual inductor C, measurement and control unit D, Large Copacity surge absorber E, disconnecting switch G, disconnecting switch G, electronic mutual inductor C, quick-acting isolator A are sequentially connected in series, the current signal at measurement and control unit D detection electronic mutual inductor C two ends, and be connected with quick-acting isolator A, Special high-voltage current limiter B is in parallel with quick-acting isolator A, Large Copacity surge absorber E mono-terminates Special high-voltage current limiter B, one end ground connection.
The useful point that the present invention has: the operation-current tolerance value of traditional switch; fail to reach higher connecting-disconnecting function; use the present invention can protect the equipment such as 6-35kv main transformer in power system; outlet short trouble in lower system; the rapid efficient analysis action of this device, and excise trouble point, movement time is extremely short; the present invention can solve with present on problem, there is economy, stable, the feature such as effectively simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Detailed description of the invention
With reference to Fig. 1, the present invention is connected in network system, disconnecting switch G is Guan Bi in a situation of use, measurement and control unit D is by special electronic mutual inductor C, this transformer is the electronic mutual inductor that a kind of anti-saturation degree is high, the current signal in circuit can be accurately detected, nearly all by quick-acting isolator A that resistance value is micro-ohm rank when measurement and control unit D detects normal current.Once system has Large Copacity short circuit or transformer short-circuit, the current signal that measurement and control unit D collection electric mutual inductor C detects is analyzed judging, when reaching a default initiation value, measurement and control unit D will send actuating signal to quick-acting isolator A, quick-acting isolator A will will disconnect at a high speed within the time of Microsecond grade, while disconnecting, fault current is transferred in high-tension fuse B carry out blow-out, within the time of 2-3s, cut-offfing short circuit current, the overvoltage that blow-out produces absorbs release through surge absorber E.After whole action completes, measurement and control unit D gives a warning model, for outside.
Judge whether to be short-circuited at CT electronic mutual inductor C, utilize the instantaneous value of electric current and current changing rate and logical relation, reach condition the most simultaneously, measurement and control unit D just sends actuating signal, prevents equipment from producing inrush phenomenon in the moment closed a floodgate, produces erroneous judgement.
Measurement and control unit of the present invention is to be close to electric mutual inductor C, the consume of anti-stop signal, disconnecting switch G and surge absorber E dress and switch cubicle inlet wire and leading-out terminal, surge absorber E end ground connection, in order to quickly discharge residual voltage.
Breaking down in systems short circuit, before electric current is not up to peak value, by its high-speed breaking, short circuit current is transferred in high-tension fuse carry out blow-out, and the overvoltage of generation is absorbed by efficient surge absorber and discharged, can handling failure, and eliminate fault.It is limited that common fuse comes disengagement failure current capability region, can not meet during big electric current.The connecting-disconnecting function of chopper is limited can not reach high breaking；Cut-off simultaneously in 60-200ms, during special short circuit fault, can not effectively protect equipment.Current-limiting reactor decomposes absorption short circuit current, but too increases the idle consume in electrical network, and power grid quality declines.
Therefore the present invention can solve the existence of problem above, the most economical, stable, effective.
Claims (1)
1. an action device with metering function, it is characterized in that it comprises quick-acting isolator (A), Special high-voltage current limiter (B), electronic mutual inductor (C), measurement and control unit (D), Large Copacity surge absorber (E), disconnecting switch (G), disconnecting switch (G), electronic mutual inductor (C), quick-acting isolator (A) is sequentially connected in series, the current signal at measurement and control unit (D) detection electronic mutual inductor (C) two ends, and be connected with quick-acting isolator (A), Special high-voltage current limiter (B) is in parallel with quick-acting isolator (A), Large Copacity surge absorber (E) one termination Special high-voltage current limiter (B), one end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610477517.9A CN105958451A (en) | 2016-06-27 | 2016-06-27 | Actuator with current limiting effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610477517.9A CN105958451A (en) | 2016-06-27 | 2016-06-27 | Actuator with current limiting effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105958451A true CN105958451A (en) | 2016-09-21 |
Family
ID=56904049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610477517.9A Withdrawn CN105958451A (en) | 2016-06-27 | 2016-06-27 | Actuator with current limiting effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105958451A (en) |
-
2016
- 2016-06-27 CN CN201610477517.9A patent/CN105958451A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20160921 |
|
| WW01 | Invention patent application withdrawn after publication |