CN102201302A - Tripping device - Google Patents
Tripping device Download PDFInfo
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- CN102201302A CN102201302A CN2011101376013A CN201110137601A CN102201302A CN 102201302 A CN102201302 A CN 102201302A CN 2011101376013 A CN2011101376013 A CN 2011101376013A CN 201110137601 A CN201110137601 A CN 201110137601A CN 102201302 A CN102201302 A CN 102201302A
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- dropout
- driver element
- performance element
- screen unit
- trip gear
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Abstract
The invention discloses a tripping device applied to a low-voltage circuit breaker. The tripping device comprises a first tripping executing unit and a first tripping driving unit. The first tripping driving unit is electrically connected with the first tripping executing unit; and a circuit formed by the first tripping driving unit and the first tripping executing unit is connected with a shielding unit, and the shielding unit can be controlled by an external signal to make the circuit be switched off or switched on. The invention further discloses a circuit breaker comprising the tripping device disclosed by the invention and a protection function expansion method of the circuit breaker. Compared with the prior art, the invention can realize multiple protection without interference one another.
Description
Technical field
The present invention relates to a kind of trip gear, particularly the trip gear of low-voltage circuit breaker belongs to the low-voltage electrical apparatus field.
Background technology
As everyone knows, low-voltage circuit breaker is used for not disjunction continually and connects circuit, and one of its most important effect is to cut off the electricity supply under circuit is short-circuited the situation of fault, with protection circuit, equipment and personal security.Circuit breaker is made of contact arc-extinguishing system, dropout actuator and dropout driver element usually, and wherein the effect of contact arc-extinguishing system is to rely on the switching of contact to connect and the branch deenergizing; The effect of dropout actuator is that the switching for contact provides actuating force, for example modal magnetic flow convertor; The dropout driver element then plays the variation of observation circuit operational factor, and sends the effect of cut-offfing instruction to operating mechanism when fault takes place.According to the difference of supply power mode, trip gear can be divided into two types of external power source and self energizings usually, and wherein self energizing is meant that the current transformer that utilizes with the major loop interlinkage directly extracts required electric energy from major loop.
One of important trend of current circuit breaker technical development is the defencive function that enriches, and is to realize that circuit breaker enriches the important development direction of defencive function and use the intelligent electrical apparatus release of electronic technology design.Intelligent electrical apparatus release uses electronic chip to carry out data processing, and the data-handling capacity that makes full use of microprocessor obtains accurately, the flexible and multifarious protective feature of tool.But intelligent electrical apparatus release needs power supply ability operate as normal, and in AC system, the working power of intelligent electrical apparatus release is all taken from the current transformer with the major loop interlinkage usually.So just bring a problem, under the situation that no current or electric current are very little in major loop, intelligent electrical apparatus release is in failure state, if this moment the fault that is short-circuited, or during the closing of power circuit breaker short trouble, circuit breaker can't effective action and lose defencive function; On the other hand, for the circuit breaker that uses in direct current system,, therefore need provide external power source for release usually owing to can't obtain stable working power from major loop by the method for electromagnetic induction.No matter be the power supply of taking from major loop in the AC system; or the power supply that provides by the outside in the direct current system itself; all there is integrity problem; in case power supply breaks down; intelligent electrical apparatus release will lose defencive function; ifs circuit breaks down under the intelligent electrical apparatus release invalid state, and circuit breaker will lose defencive function and be accidents caused.
For overcoming the problems referred to above, general existing intellectual circuit breaker has all designed a self-energizing rapid-releasing dress usually
Put, directly respond the short trouble that major loop takes place, can not reach under the situation of requirement in intelligent electrical apparatus release power-fail or response speed, make the circuit breaker can be reliably in open circuit fault time-division deenergizing to guarantee circuit breaker with nonelectronic method.For example, U.S. Pat 6034858A has introduced a kind of current transformer that does not rely on external power source, and this current transformer comprises the magnetic circuit of a major loop of an associated current and the secondary coil of band tripping relay.This magnetic circuit comprises movement parts and fixture.Movement parts can move to make position from aperture position when the electric current of a major loop exceeds preset value.Thereby the change of movement parts position can cause the variation of magnetic flux in the magnetic circuit to induce electric current in secondary coil, and this induced current triggers magnetic flow convertor, thereby realizes rapid-releasing.This patent has partly solved the confession source problem of dc circuit breaker; only in its movement parts motion process, produce electric current according to its structure; time is Millisecond; can not be for a long time, stablely power for intelligent controller effectively; can't realize functions such as real-time data record, on-line monitoring, the defencive function of realization is very limited.And the scheme that intelligent electrical apparatus release that prior art provides and quick-tripping device use simultaneously, there is a contradiction: owing to used self-energizing quick-tripping device, when the short circuit current in the main circuit reaches a certain threshold values, no matter whether intelligent electrical apparatus release sends trip signal, and quick-tripping device all will touch operating mechanism action branch deenergizing.But under intelligent electrical apparatus release can the situation of operate as normal; from the entire circuit system angle of Reasonable Protection more; often wish that circuit breaker does not respond the instruction of cut-offfing that quick-tripping device sends; and only respond the instruction of cut-offfing that intelligent electrical apparatus release sends, the method for reasonable this function of realization is not just arranged at present in the prior art.
Summary of the invention
Technical problem to be solved by this invention is to overcome the problem of existing intelligent trip gear and the shared existing mutual interference mutually of self-energizing quick-tripping device; a kind of non-interference between multiple protective and the multiple protective that realizes is provided, reliably guarantees the trip gear of power system security.
The present invention solves the problems of the technologies described above by the following technical solutions,
A kind of trip gear comprises the first dropout performance element, the first dropout driver element, and the described first dropout driver element is electrically connected with the described first dropout performance element; It is characterized in that, be connected with a screen unit in described first dropout driver element and the formed loop of the first dropout performance element, this screen unit can be accepted external signal control turn-offs or conducting described loop.
Further, this trip gear also comprises the second dropout performance element and the second dropout driver element, and the second dropout performance element is electrically connected with the second dropout driver element; The described second dropout driver element is electrically connected with described screen unit, when the second dropout performance element and the conducting of the formed loop of the second dropout driver element, the second dropout driver element is controlled described screen unit turn-offs described first dropout driver element and the formed loop of the first dropout performance element; When the second dropout performance element and the shutoff of the formed loop of the second dropout driver element, the second dropout driver element is controlled described screen unit and is made the described first dropout driver element and the first dropout performance element formed loop conducting.
Further, the described first dropout performance element and the second dropout performance element are same dropout performance element.
Preferably, the described first dropout driver element is a self energizing dropout driver element.
According to inventive concept of the present invention, can obtain a kind of circuit breaker, this circuit breaker comprises trip gear of the present invention.
According to inventive concept of the present invention, the defencive function extended method that also can obtain a kind of circuit breaker is as follows:
A kind of defencive function extended method of circuit breaker, described circuit breaker comprises a trip gear, and described trip gear comprises one first dropout driver element, and the dropout performance element that is electrically connected with this first dropout driver element; It is characterized in that this method may further comprise the steps:
Steps A, insert a screen unit in described first dropout driver element and the formed loop of dropout performance element, this screen unit can be accepted external signal control and make formed loop shutoff of described first dropout driver element and dropout performance element or conducting;
Step B, described dropout performance element is connected with the output of an other intelligent controller, the input of this intelligent controller is connected with and is used for detecting unit that major loop is detected;
Step C, the control end of the described screen unit output with described other intelligent controller is connected.。
As a preferred version, described screen unit is a switching tube, and this switching tube is in parallel with described dropout performance element; And the diode of in described other intelligent controller and the formed loop of this switching tube, connecting, the position of this diode and direction can make described other intelligent controller and the formed loop open circuit of this switching tube, and when described switching tube conducting, described switching tube can make described first dropout driver element and the formed loop of dropout performance element turn-off.
As another preferred version, described screen unit is a relay, and this relay is connected with described dropout performance element.
The present invention is by inserting a screen unit in dropout driver element and the formed loop of dropout performance element; this trip gear can combine with other trip gear (for example inner or outside intelligent electrical apparatus release) and form multiple protective mechanism, and noiseless each other.During use, the control loop of screen unit is connected with other trip gear, under the situation of other trip gear operate as normal, cut off getting in touch between dropout driver element and the dropout performance element, protect by other trip gear, for example inner or outside intelligent electrical apparatus release, thus can utilize its strong functions to realize functions such as complete protection, detection, monitoring; Under the situation of other trip gear fault, the defencive function of trip gear of the present invention is opened, thereby realizes basic defencive function, guarantees the safety of electric power system.
Description of drawings
Fig. 1 is the theory diagram of trip gear of the present invention;
Fig. 2 is the structural representation of the embodiment of the invention one;
Fig. 3 is the structural representation of the embodiment of the invention two.
Embodiment
Trip gear of the present invention is as part in the accompanying drawing 1(frame of broken lines) shown in, comprising dropout performance element, dropout driver element, described dropout driver element is electrically connected with described dropout performance element; Be connected with a screen unit in described dropout driver element and the formed loop of dropout performance element, this screen unit can be accepted external signal control turn-offs or conducting described dropout driver element and the formed loop of dropout performance element.The control end of this screen unit can be connected with other trip gear, thereby under the situation that realizes multiple protective, noiseless each other.
Below in conjunction with specific embodiment and accompanying drawing technical scheme of the present invention is elaborated:
Embodiment one
As shown in Figure 2, in the present embodiment, the described first dropout performance element is the most frequently used magnetic flow convertor 2, and magnetic flow convertor 2 is accepted the signal of the connected first dropout driver element, triggers the action of contact arc-extinguishing system or contact, turn-offs major loop.The described first dropout driver element is a self energizing dropout driver element 1.Self energizing dropout driver element 1 among the present invention can adopt the current transformer among the U.S. Pat 6034858A, also can adopt other similar techniques scheme.As shown in Figure 2, in self energizing dropout driver element 1 and magnetic flow convertor 2 formed loops, be connected to a switching tube 3 in parallel with magnetic flow convertor 2, the control end of switching tube 3 is connected with the intelligent electrical apparatus release of a use external power source.This intelligent electrical apparatus release comprises the detecting unit 5 that detects the main circuit current variation, the intelligent controller 4 of the detection signal that reception detecting unit 5 sends, and dropout performance element, shared with magnetic flow convertor 2 in the present embodiment is the dropout performance element of this intelligent electrical apparatus release, be that first, second dropout performance element is magnetic flow convertor 2, thereby can reduce number of components.Intelligent controller 4 is connected by external power source (representing with ACC) power supply and with magnetic flow convertor 2, according to the action of detected main circuit current situation control magnetic flow convertor 2.As seen from Figure 2, when adopting switching tube in parallel as screen unit, outside intelligent controller 4 forms the loop with switching tube 3, in order to prevent that external power source is by switching tube 3 short circuits, thereby can not provide power supply for magnetic flow convertor, the diode 31 of need connecting in intelligent controller 4 and switching tube 3 formed loops, during connection, the installation site of diode 31 and direction can make intelligent controller 4 and switching tube 3 formed loop open circuit.Be diode 31 conducting direction should with intelligent controller 4 current opposite in direction with switching tube 3 formed loops, and during for the work of intelligent electrical apparatus release externally, switching tube 3 can disconnect magnetic flow convertor 2 and self energizing dropout driver element 1 formed loop, diode 31 must be connected switching tube 3 and the self energizing dropout drives after the connected node of loop (being magnetic flow convertor 2 and self energizing dropout driver element 1 formed loop), and before the connected node of intelligent controller 4 and magnetic flow convertor 2, position shown in Fig. 2 for example.Self energizing dropout driver element 1 is of coupled connections with major loop, and the electric current that extracts required electric energy and monitor major loop from major loop changes, and when main circuit current was unusual, self energizing dropout driver element 1 drove magnetic flow convertor 2 and turn-offs major loops.The control end of switching tube 3 is connected with intelligent controller 4; when intelligent controller 4 can be given magnetic flow convertor 2 normally for the source; one Control current is provided for simultaneously switching tube 3; make switching tube 3 conductings; self energizing dropout this moment driver element 1 constitutes a loop with switching tube 3; be that magnetic flow convertor 2 is by switching tube 3 short circuits; self energizing dropout this moment driver element 1 provides the dropout electric energy can not for magnetic flow convertor 2, and the intelligent electrical apparatus release that defencive function is made up of detecting unit 5, intelligent controller 4 and magnetic flow convertor 2 is born.Under the situation that this intelligent electrical apparatus release can't effectively be worked, when producing faults etc. as external power source VCC outage, intelligent controller 4, switching tube 3 is in the state of blocking, self energizing dropout this moment driver element 1 be magnetic flow convertor 2 for the source, the realization defencive function.Switching tube 3 can be a transistor, metal oxide semiconductor field effect tube (Metal-Oxide Semiconductor Field-Effect Transistor for example, be MOSFET), insulated gate bipolar transistor (Insulate Gate Bipolar Transisto, be IGBT), bipolar junction transistor (Bipolar Junction Transistor, i.e. BJT), the perhaps switching tube of other similar functions.Intelligent electrical apparatus release in the present embodiment can be that intelligent controller is built-in, also can be that intelligent controller is external; Intelligent controller can use external power source, also can adopt self-energizing form, utilizes current transformer to extract required electric energy from main circuit, certainly, adopts the intelligent controller of self energizing form only to be applicable to AC system.
Embodiment two
As shown in Figure 3, in the present embodiment, in self energizing dropout driver element 1 and magnetic flow convertor 2 formed loops, be in series with a relay 3, the input of this relay 3 is connected with intelligent controller 4.Other parts are all identical with embodiment one, repeat no more herein.When intelligent controller 4 can be given magnetic flow convertor 2 normally for the source, one Control current is provided for simultaneously relay 3, make the output loop of relay 3 be in off state, self energizing dropout this moment driver element 1 disconnects with magnetic flow convertor 2 formed loops, self energizing dropout driver element 1 provides the dropout electric energy can not for magnetic flow convertor 2, is born by the intelligent electrical apparatus release that detecting unit 5, intelligent controller 4 and magnetic flow convertor 2 are formed.Under the situation that intelligent electrical apparatus release can't effectively be worked; when producing faults etc. as external power source VCC outage, intelligent controller 4; the output loop of relay 3 is in conducting state; self energizing dropout driver element 1 and magnetic flow convertor 2 formed loop conductings; self energizing dropout driver element 1 is that magnetic flow convertor 2 supplies the source, realizes defencive function.Relay 3 can be electromagnetic relay, solid-state relay etc.
Though the present invention is highly suitable for direct current, not merely be used for direct current, also can apply to exchange.As be used to exchange breaker of plastic casing; because breaker of plastic casing finite volume; during the breaker of plastic casing design; function may be imperfect; when needs are expanded its defencive function; need the outer function of joining strong; detecting unit that precision is high and intelligent controller; with breaker of plastic casing internal protection functional shielding; the defencive function of the inner intelligent electrical apparatus release of breaker of plastic casing for example; to prevent interference; then can adopt breaker protection method for developing functions of the present invention this moment, will both realize functions expanding as the cut-out of getting in touch of breaker of plastic casing inside intelligent electrical apparatus release and magnetic flow convertor; and under the situation that externally intelligent controller can't effectively be worked; cut off the power supply as external power source VCC; when producing fault, the defencive function of the inner intelligent electrical apparatus release of circuit breaker starts, and has realized the function of multiple protective.
Below only exemplified two kinds of embodiments of the present invention, do not carried out exhaustive all possible execution mode.Those skilled in the art should know that other the selectable execution mode based on the present invention's design all falls into protection scope of the present invention.
Claims (12)
1. a trip gear comprises the first dropout performance element, the first dropout driver element, and the described first dropout driver element is electrically connected with the described first dropout performance element; It is characterized in that, be connected with a screen unit in described first dropout driver element and the formed loop of the first dropout performance element, this screen unit can be accepted external signal control turn-offs or conducting described loop.
2. trip gear according to claim 1 is characterized in that this trip gear also comprises the second dropout performance element and the second dropout driver element, and the second dropout performance element is electrically connected with the second dropout driver element; The described second dropout driver element is electrically connected with described screen unit, when the second dropout performance element and the conducting of the formed loop of the second dropout driver element, the second dropout driver element is controlled described screen unit turn-offs described first dropout driver element and the formed loop of the first dropout performance element; When the second dropout performance element and the shutoff of the formed loop of the second dropout driver element, the second dropout driver element is controlled described screen unit and is made the described first dropout driver element and the first dropout performance element formed loop conducting.
3. as trip gear as described in the claim 2, it is characterized in that the described first dropout performance element and the second dropout performance element are same dropout performance element.
4. trip gear according to claim 1 is characterized in that the described first dropout driver element is a self energizing dropout driver element.
5. trip gear according to claim 1 is characterized in that described screen unit is in parallel with the described first dropout performance element.
6. as trip gear as described in the claim 5, it is characterized in that described screen unit is a switching tube.
7. trip gear according to claim 1 is characterized in that described screen unit is connected with the described first dropout performance element.
8. as trip gear as described in the claim 7, it is characterized in that described screen unit is a relay.
9. a circuit breaker comprises a trip gear, it is characterized in that, described trip gear is each described trip gear of claim 1-8.
10. the defencive function extended method of a circuit breaker, described circuit breaker comprises a trip gear, described trip gear comprises one first dropout driver element, and the dropout performance element that is electrically connected with this first dropout driver element; It is characterized in that this method may further comprise the steps:
Steps A, insert a screen unit in described first dropout driver element and the formed loop of dropout performance element, this screen unit can be accepted external signal control and make formed loop shutoff of described first dropout driver element and dropout performance element or conducting;
Step B, described dropout performance element is connected with the output of an other intelligent controller, the input of this intelligent controller is connected with and is used for detecting unit that major loop is detected;
Step C, the control end of the described screen unit output with described other intelligent controller is connected.
11. the defencive function extended method as circuit breaker as described in the claim 10 is characterized in that described screen unit is a switching tube, this switching tube is in parallel with described dropout performance element; And the diode of in described other intelligent controller and the formed loop of this switching tube, connecting, the position of this diode and direction can make described other intelligent controller and the formed loop open circuit of this switching tube, and when described switching tube conducting, described switching tube can make described first dropout driver element and the formed loop of dropout performance element turn-off.
12. the defencive function extended method as circuit breaker as described in the claim 10 is characterized in that described screen unit is a relay, this relay is connected with described dropout performance element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110137601 CN102201302B (en) | 2011-05-26 | 2011-05-26 | Tripping device, breaker and defencive function extension method of breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110137601 CN102201302B (en) | 2011-05-26 | 2011-05-26 | Tripping device, breaker and defencive function extension method of breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102201302A true CN102201302A (en) | 2011-09-28 |
| CN102201302B CN102201302B (en) | 2013-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110137601 Active CN102201302B (en) | 2011-05-26 | 2011-05-26 | Tripping device, breaker and defencive function extension method of breaker |
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| Country | Link |
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| CN (1) | CN102201302B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6034858A (en) * | 1996-11-07 | 2000-03-07 | Schneider Electric Sa | Current transformer, trip device and circuit breaker comprising such a transformer |
| CN101384910A (en) * | 2006-01-24 | 2009-03-11 | 施耐德电器工业公司 | Device for measuring DC current having large measurement swing, electronic trip comprising such a measurement device and cut-off device having such a trip |
| CN202221743U (en) * | 2011-05-26 | 2012-05-16 | 常熟开关制造有限公司(原常熟开关厂） | Release device and breaker |
-
2011
- 2011-05-26 CN CN 201110137601 patent/CN102201302B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6034858A (en) * | 1996-11-07 | 2000-03-07 | Schneider Electric Sa | Current transformer, trip device and circuit breaker comprising such a transformer |
| CN101384910A (en) * | 2006-01-24 | 2009-03-11 | 施耐德电器工业公司 | Device for measuring DC current having large measurement swing, electronic trip comprising such a measurement device and cut-off device having such a trip |
| CN202221743U (en) * | 2011-05-26 | 2012-05-16 | 常熟开关制造有限公司(原常熟开关厂） | Release device and breaker |
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| Publication number | Publication date |
|---|---|
| CN102201302B (en) | 2013-08-14 |
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