CN103077861B - Switching device trip coil protector - Google Patents
Switching device trip coil protector Download PDFInfo
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- CN103077861B CN103077861B CN201210280021.4A CN201210280021A CN103077861B CN 103077861 B CN103077861 B CN 103077861B CN 201210280021 A CN201210280021 A CN 201210280021A CN 103077861 B CN103077861 B CN 103077861B
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Abstract
The present invention discloses switching device trip coil protector, it comprises an operating power of series connection, the working coil of one electrical apparatus release, one trip switch, one pilot switch and a protection unit, described protection unit comprises an impedance circuit (50) in parallel and a delay switch circuit, described delay switch circuit comprises a switch module (60) and a time delay module (70), described switch module (60) then disconnects for normally closed switch and in time delay module (70) time delay to during set(ting)value, described time delay module (70) then starts timing time delay when working coil (20) is charged. it has following point: time delay module starts timing time delay while the working coil of electrical apparatus release is charged, when time delay is to certain set(ting)value, switch module clear the circuit, impedance circuit is accessed in control loop simultaneously, the current value of control loop is reduced, and current value is reduced to the working coil guaranteeing electrical apparatus release can be charged for a long time and the level of scaling loss does not occur.
Description
Technical field
The present invention relates to a kind of switching device trip coil protector.
Background technology
Current most of switching device manufacture company design electrical apparatus release schematic diagram as shown in Figure 1, it comprises an operating power 10 ', the working coil 20 ' of an electrical apparatus release, a trip switch 30 ' and a pilot switch 40 ', described operating power 10 ', trip switch 30 ', pilot switch 40 ' and working coil 20 ' successively series electrical connect. Its principle of work is as follows: when operation control switch 30 ', and the working coil 20 ' of switching device electrical apparatus release is charged, electrical apparatus release switch action, and pilot switch 40 ' switches disconnection simultaneously, cuts off working coil 20 ' electric current.
Owing to the working coil 20 ' of electrical apparatus release is designed to duty in short-term, it is meet to require under the operating mode that switching device normally runs, but when following situations occurs:
A, when the minimum operating voltage that operating power 10 ' voltage requires lower than switching device;
B, be out of order when operating mechanism self transmission, cannot smoothly complete operation time;
It is possible to the working current of the long-term band higher value of the working coil 20 ' causing electrical apparatus release, transition is generated heat, and finally causes electrical apparatus release coil scaling loss.
Summary of the invention
The present invention provides switching device trip coil protector, which overcomes the deficiency existing for background technology breaker in middle equipment trip coil.
The present invention solves the technical scheme adopted of its technical problem:
Switching device trip coil protector, it comprises an operating power (10), the working coil (20) of one electrical apparatus release, one trip switch (30), one pilot switch (40) and a protection unit, described operating power (10), trip switch (30), protection unit, the electricity of pilot switch (40) and working coil (20) connects as series connection, described protection unit comprises an impedance circuit (50) in parallel and a delay switch circuit, described delay switch circuit comprises a switch module (60) and a time delay module (70), described switch module (60) then disconnects for normally closed switch and in time delay module (70) time delay to during set(ting)value, described time delay module (70) then starts timing time delay when working coil (20) is charged.
Among one better embodiment: the described set(ting)value time is 0.05��0.3s.
Among one better embodiment: described switch module (60) and time delay module (70) are connected in parallel, described switch module (60) and time delay module (70) signal connect.
Among one better embodiment: described impedance circuit (50) comprises resistance.
Among one better embodiment: described impedance circuit (50) comprises reactance.
Among one better embodiment: described impedance circuit (50) comprises resistance and the reactance of series connection.
The technical program is compared with background technology, and its tool has the following advantages:
Time delay module starts timing time delay while the working coil of electrical apparatus release is charged, after time delay to predetermined instant, switch module clear the circuit, impedance circuit is accessed in loop simultaneously, the current value of control loop is reduced, and current value is reduced to the working coil guaranteeing electrical apparatus release can be charged for a long time and the level of scaling loss does not occur.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 depicts the electrical apparatus release control circui principle schematic of background technology.
Fig. 2 depicts the schematic diagram of the switching device trip coil protector of a better embodiment.
Embodiment
Please refer to Fig. 2; switching device trip coil protector; it comprises working coil 20, trip switch 30, pilot switch 40 and a protection unit of operating power 10, electrical apparatus release, and the electricity of described operating power 10, trip switch 30, protection unit, pilot switch 40 and working coil 20 connects as series connection.
When operation control switch 30, the working coil 20 of switching device electrical apparatus release is charged, electrical apparatus release switch action, and pilot switch 40 switches disconnection simultaneously, cuts off working coil 20 electric current, and this technology is that prior art is not further described at this.
Described protection unit comprises impedance circuit 50 and a delay switch circuit in parallel; described delay switch circuit comprises switch module 60 and a time delay module 70; described switch module 60 for normally closed switch and in time delay module 70 time delay to then disconnecting during set(ting)value, described time delay module 70 then starts timing time delay when working coil 20 is charged. Among the present embodiment, the described time delay time is 0.05��0.3s.
Among the present embodiment, described switch module 60 and time delay module 70 are connected in parallel, and, described switch module 60 and time delay module 70 signal connect. Among the present embodiment, described time delay module and switch module can commercially directly be bought.
Described impedance circuit 50 comprise one or more resistance or and one or more reactance, and, impedance circuit or can be composed in parallel by connecting by single or multiple cell impedance, after sealing in impedance circuit 50, reduce the electric current of working coil, make the consumed power��3VA of the coil in electrical apparatus release.
In order to clearly demonstrate this specific embodiment, principle of work is specifically described: operation control switch 30 below, the electric current of power supply 10 is powered (now by switch module 60 for coil 20, owing to the impedance value of impedance circuit 50 is bigger, therefore electric current can not flow through impedance circuit 50), time delay module 70 starts timing time delay while the working coil 20 of electrical apparatus release is charged, then: working coil 20 is charged, the normal action of electrical apparatus release switch, pilot switch 40 normally switches disconnection, then cut off working coil 20 electric current; Working coil 20 is charged, electrical apparatus release switch cannot normally action, or, pilot switch 40 cannot normally switch disconnection (during as background technology produced problem occur), then time delay module 70 in time delay to after during predetermined set(ting)value, time delay module 70 triggers switch module 60 and carries out point disconnected, switch module 60 clear the circuit, impedance circuit 50 is accessed in loop simultaneously, owing to impedance loop increases, electric current reduces, and the current value of control loop is reduced, and current value is reduced to the working coil 20 guaranteeing electrical apparatus release can be charged for a long time and the level of scaling loss does not occur.
Among the present embodiment; time delay module 70 starts timing while the working coil of electrical apparatus release is charged, when timing is to certain moment in 0.05��0.3s, drives described switch module clear the circuit; accessing in loop by impedance, this time preferably controls at 0.08��0.15s simultaneously;
Among the present embodiment: a, described switch module 60 and time delay module 70, can be designed to two independent physical locations, it is possible to is integrated into a physical location; B, described impedance circuit also can merge into a physical location with switch module 60 and time delay module 70, or independent setting.
Switching device voltage range among the present embodiment is such as 3.6kV to 550kV.
The above, be only the better embodiment of the present invention, therefore can not limit scope of the invention process according to this, and the equivalence namely done according to patent scope of the present invention and description changes and modifies, and all should still belong in the scope that the present invention is contained.
Claims (6)
1. switching device trip coil protector, it comprises an operating power (10), the working coil (20) of one electrical apparatus release, one trip switch (30) and a pilot switch (40), it is characterized in that: it also comprises a protection unit, described operating power (10), trip switch (30), protection unit, the electricity of pilot switch (40) and working coil (20) connects as series connection, described protection unit comprises an impedance circuit (50) in parallel and a delay switch circuit, described delay switch circuit comprises a switch module (60) and a time delay module (70), described switch module (60) then disconnects for normally closed switch and in time delay module (70) time delay to during set(ting)value, simultaneously impedance circuit (50) access is so that working coil (20) consumed power��3VA, operation control switch (30), the electric current of power supply (10) is working coil (20) power supply by switch module (60), and described time delay module (70) then starts timing time delay when working coil (20) is charged.
2. switching device trip coil protector according to claim 1, it is characterised in that: the described set(ting)value time is 0.05��0.3s.
3. switching device trip coil protector according to claim 1; it is characterized in that: described switch module (60) and time delay module (70) are connected in parallel, described switch module (60) and time delay module (70) signal connect.
4. switching device trip coil protector according to claim 1, it is characterised in that: described impedance circuit (50) comprises resistance.
5. switching device trip coil protector according to claim 1, it is characterised in that: described impedance circuit (50) comprises reactance.
6. switching device trip coil protector according to claim 1, it is characterised in that: described impedance circuit (50) comprises resistance and the reactance of series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210280021.4A CN103077861B (en) | 2012-08-07 | 2012-08-07 | Switching device trip coil protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210280021.4A CN103077861B (en) | 2012-08-07 | 2012-08-07 | Switching device trip coil protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103077861A CN103077861A (en) | 2013-05-01 |
| CN103077861B true CN103077861B (en) | 2016-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210280021.4A Active CN103077861B (en) | 2012-08-07 | 2012-08-07 | Switching device trip coil protector |
Country Status (1)
| Country | Link |
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| CN (1) | CN103077861B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106298391A (en) * | 2016-10-25 | 2017-01-04 | 正泰电气股份有限公司 | A kind of switchgear tripping coil protection device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2764033Y (en) * | 2004-03-23 | 2006-03-08 | 潍坊开发区华为电气有限公司 | Breaker coil protector |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0520999A (en) * | 1991-07-12 | 1993-01-29 | Toshiba Corp | Breaker |
| JPH0581997A (en) * | 1991-09-24 | 1993-04-02 | Fuji Electric Co Ltd | Breaker device |
| CN2269011Y (en) * | 1996-08-02 | 1997-11-26 | 郭伟 | Repeatable cut-off unit of circuit breaker |
| CN201138748Y (en) * | 2007-12-15 | 2008-10-22 | 东营供电公司 | Protecting equipment for electric power secondary circuit tripping and closing coil |
| CN201820716U (en) * | 2010-10-28 | 2011-05-04 | 河南省电力公司南阳供电公司 | Circuit breaker control circuit of transformer substation |
| CN202695353U (en) * | 2012-08-07 | 2013-01-23 | 厦门华电开关有限公司 | Switch equipment electrical apparatus release coil protective device |
-
2012
- 2012-08-07 CN CN201210280021.4A patent/CN103077861B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2764033Y (en) * | 2004-03-23 | 2006-03-08 | 潍坊开发区华为电气有限公司 | Breaker coil protector |
Non-Patent Citations (1)
| Title |
|---|
| 高压断路器合闸线圈保护原理;索南加乐等;《继电器》;20020331;第30卷(第3期);第27-29页 * |
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| CN103077861A (en) | 2013-05-01 |
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