CN104577998A - Trip and closing current circuit of adaptive circuit breaker - Google Patents
Trip and closing current circuit of adaptive circuit breaker Download PDFInfo
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- CN104577998A CN104577998A CN201410776044.3A CN201410776044A CN104577998A CN 104577998 A CN104577998 A CN 104577998A CN 201410776044 A CN201410776044 A CN 201410776044A CN 104577998 A CN104577998 A CN 104577998A
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- circuit
- closing
- relay
- breaker
- circuit breaker
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Abstract
The invention relates to a trip and closing current circuit of an adaptive circuit breaker. The trip and closing current circuit comprises a forward node and a negative node, wherein two parallel-connected branch circuits are arranged between the forward node and the negative node; a relay is arranged on the first branch circuit, and a current division module is arranged on the second branch circuit. According to the trip and closing current circuit disclosed by the invention, current selection corresponding to a trip and closing circuit and change of the type of the relay are not needed; furthermore, the circuit breaker can be reliably tripped, and a trip and closing coil cannot be burned out.
Description
Technical field
The present invention relates to a kind of self adaptation circuit breaker breaker tripping and closing current circuit.
Background technology
Primary cut-out (abbreviation circuit breaker) is the key equipment in electric power system, and the reliable control of circuit breaker is the reliability service being related to electric power system.In order to ensure that circuit breaker action message China power system technology personnel devise the special control box loop controlling circuit breaker.Breaker operation cabinet can ensure that the control loop of circuit breaker reliably sends a deciliter instruction in the operating process of circuit breaker.
In electric power system circuit breaker operation circuit in circuit design, need to relate to switch control circuit to ensure that circuit breaker cut-offs reliably.Existing circuit breaker divides closing operation mainly to be realized by the action controlling circuit breaker tripping relay.Because existing circuit breaker tries out in different electric pressures, and the breaking current of circuit breaker is also different, and the divide-shut brake electric current that therefore operation circuit of circuit breaker is right is not identical yet.Domestic divide-shut brake electric current regular size: 0.25,0.5,1A, 2A, be up to 6A.For different divide-shut brake electric currents, existing solution in closing loop, seals in different self-sustaining current relays realize.Fig. 1 is the closing loop figure that prior art adopts, and the relay being labeled as SHJ, ZHJ and TBJ in figure is the current relay accessed in tripping operation/closing circuit.But, for ensureing that the reliable tripping of circuit breaker is cut and can not be burnt out tripping coil, need to flow through relay current along with in different circuit breakers adjustment loop, get up also cumbersome because self-sustaining current relay ratio is easier to damage replacing, very inconvenient when production and onsite application.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of self adaptation circuit breaker breaker tripping and closing current circuit, being used in the tripping operation/closing circuit of the control box for controlling circuit breaker, automatically can adapting to various tripping coil electric current.
The invention provides a kind of self adaptation circuit breaker breaker tripping and closing current circuit, comprise: forward node and negative sense node, there are between described forward node and described negative sense node two branch roads be in parallel, the first branch road is provided with relay, the second branch road is provided with diverter module.
Concrete, described diverter module is the diode of two forward series connection.
Preferably, the rated voltage of described relay is 1.5V.
Utilize self adaptation circuit breaker breaker tripping and closing current circuit of the present invention, the electric current of corresponding breaker tripping and closing circuit is not needed to select and change the model of relay, and can ensure that the reliable tripping of circuit breaker is cut and can not be burnt out tripping coil, the self-sustaining current relay ratio solving prior art is easier to damage replacing and gets up also cumbersome, the technical problem very inconvenient when production and onsite application.
Accompanying drawing explanation
Fig. 1 is the closing loop figure that prior art adopts;
Fig. 2 is the circuit diagram of self adaptation circuit breaker breaker tripping and closing current circuit of the present invention;
Fig. 3 is the enforcement state diagram of self adaptation circuit breaker breaker tripping and closing current circuit of the present invention.
Embodiment
Below in conjunction with accompanying drawing 2 and accompanying drawing 3, self adaptation circuit breaker breaker tripping and closing current circuit of the present invention is described in detail.As shown in Figure 2, have two branch lines be in parallel, the first branch line is provided with miniature relay 3 between forward node A and negative sense Node B, on the second branch line, forward is connected the first diode 1 and the second diode 2.Concrete, because the voltage at two ends is about 0.7V during diode forward conducting, therefore the relay of rated voltage 1.5V selected by miniature relay 3, and adopt Panasonic ST2ST2-DC 1.5V relay in present embodiment, resistance is 1000 Ω.The model of the first diode 1 and the second diode 2 is 6A10, and during forward conduction, average On current is 6A, when two diode normallies, the voltage at each diode two ends is 0.7V, along with the increase of electric current, pressure drop during forward conduction is 1V, and during reverse-conducting, conducting voltage is 1000V.
Below principle of the present invention is described.
The rated voltage of relay 1 is 1.5V, and the first diode 2 is identical diode with the second diode 3, and therefore, the voltage at the second branch road two ends is 0.7*2=1.4V.Along with the increase of electric current, the second branch road two ends maximum voltage 1.1*2=2.2V.Therefore, the minimum working current flowing through relay 1 is 1.4/1000=0.0014 (A), and maximum operating currenbt is 2.2/1000=0.0022 (A).
The operating current of current tripping coil is minimum is 0.25A, is up to the operating current that 6A is far longer than latching relay, and therefore minimum breaker tripping and closing electric current also can ensure that latching relay reliably normally works.
Fig. 3 is the enforcement state diagram of self adaptation circuit breaker breaker tripping and closing current circuit of the present invention, joint wherein, circuit I in closing circuit, and the circuit I I in trip circuit all adopts self adaptation circuit breaker breaker tripping and closing current circuit of the present invention, in circuit I, relay HBJ is equivalent to relay 3 of the present invention, diode 1DHBJ, and diode 2DHBJ diode is equivalent to the first diode 1 and the second diode 2 of the present invention respectively.In circuit I I, relay TCJ is equivalent to relay 3 of the present invention, and diode 1DTCJ and diode 2DTCJ is equivalent to the first diode 1 and the second diode 2 of the present invention.
When normal, being 0.0014A by the electric current of relay 3, if breaker tripping and closing electric current is 0.25A, is 0.1486A by the electric current of the second branch road.If when breaker tripping and closing electric current is 6A, relay 1 is in maximum work voltage ratings, and the voltage now flowing through diode is 6-0.0022=5.9978A.Thus ensure that the current change quantity in relay 1, increase and reduce electric current all shunt by the second branch road, therefore breaker tripping and closing electric current can not affect the work of relay, and therefore relay can ensure normal useful life.The electric current of diode burden is within rated range, and diode can long-term work ensure not damage.
Claims (3)
1. a self adaptation circuit breaker breaker tripping and closing current circuit, it is characterized in that, comprising: forward node and negative sense node that there are between described forward node and described negative sense node two branch roads be in parallel, first branch road is provided with relay, the second branch road is provided with diverter module.
2. self adaptation circuit breaker breaker tripping and closing current circuit as claimed in claim 1, is characterized in that, described diverter module is the diode of two forward series connection.
3. self adaptation circuit breaker breaker tripping and closing current circuit as claimed in claim 2, it is characterized in that, the rated voltage of described relay is 1.5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410776044.3A CN104577998A (en) | 2014-12-15 | 2014-12-15 | Trip and closing current circuit of adaptive circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410776044.3A CN104577998A (en) | 2014-12-15 | 2014-12-15 | Trip and closing current circuit of adaptive circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104577998A true CN104577998A (en) | 2015-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410776044.3A Pending CN104577998A (en) | 2014-12-15 | 2014-12-15 | Trip and closing current circuit of adaptive circuit breaker |
Country Status (1)
| Country | Link |
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| CN (1) | CN104577998A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2739783Y (en) * | 2004-11-24 | 2005-11-09 | 上海飞洲自动化系统有限公司 | Voltage-clamping shunt direct-off circuit breaker using diode |
| CN2879407Y (en) * | 2006-03-16 | 2007-03-14 | 江苏金智科技股份有限公司 | Fast exit module having hardware self-holding function |
| CN1941534A (en) * | 2006-09-15 | 2007-04-04 | 南京深科博业电力自动化有限公司 | Circuit-breaker operation interface module of relay protector for power system |
| CN201527933U (en) * | 2009-10-30 | 2010-07-14 | 许继集团有限公司 | Driving circuit for tripping and closing coil |
| CN204011282U (en) * | 2014-06-09 | 2014-12-10 | 南京丰道电力科技有限公司 | A kind of latching relay circuit for protective relaying device operation circuit |
| CN204230874U (en) * | 2014-12-15 | 2015-03-25 | 国网冀北电力有限公司秦皇岛供电公司 | A kind of self adaptation circuit breaker breaker tripping and closing current circuit |
-
2014
- 2014-12-15 CN CN201410776044.3A patent/CN104577998A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2739783Y (en) * | 2004-11-24 | 2005-11-09 | 上海飞洲自动化系统有限公司 | Voltage-clamping shunt direct-off circuit breaker using diode |
| CN2879407Y (en) * | 2006-03-16 | 2007-03-14 | 江苏金智科技股份有限公司 | Fast exit module having hardware self-holding function |
| CN1941534A (en) * | 2006-09-15 | 2007-04-04 | 南京深科博业电力自动化有限公司 | Circuit-breaker operation interface module of relay protector for power system |
| CN201527933U (en) * | 2009-10-30 | 2010-07-14 | 许继集团有限公司 | Driving circuit for tripping and closing coil |
| CN204011282U (en) * | 2014-06-09 | 2014-12-10 | 南京丰道电力科技有限公司 | A kind of latching relay circuit for protective relaying device operation circuit |
| CN204230874U (en) * | 2014-12-15 | 2015-03-25 | 国网冀北电力有限公司秦皇岛供电公司 | A kind of self adaptation circuit breaker breaker tripping and closing current circuit |
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Application publication date: 20150429 |