CN105703320A - Miniature circuit breaker - Google Patents

Miniature circuit breaker Download PDF

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Publication number
CN105703320A
CN105703320A CN201410682105.XA CN201410682105A CN105703320A CN 105703320 A CN105703320 A CN 105703320A CN 201410682105 A CN201410682105 A CN 201410682105A CN 105703320 A CN105703320 A CN 105703320A
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China
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module
circuit breaker
miniature circuit
control signal
signal
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Granted
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CN201410682105.XA
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Chinese (zh)
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CN105703320B (en
Inventor
杜振明
李祎博
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Abstract

The invention provides a miniature circuit breaker. The miniature circuit breaker comprises a first module configured to measure the current and/or voltage of a line, send measurement result signals, and disconnect the line according to control signals, a second module configured to send the control signals if the measurement result signals satisfy a predetermined condition, and an interface which can form pluggable connection with the first module and the second module separately, and is configured to transmit the measurement result signals and the control signals between the first module and the second module. According to the miniature circuit breaker of the invention, a strong current part circuit and a weak current part circuit of the miniature circuit breaker are separately designed into the independent modules, the independent modules can be connected by the pluggable interface, and therefore, modular design can be realized, and independent production, separated assembly and application expansion can be facilitated.

Description

Miniature circuit breaker
Technical field
Embodiment of the present disclosure relates to a kind of miniature circuit breaker, more particularly, to a kind of modular intelligent micro-circuit breaker。
Background technology
Miniature circuit breaker (MCB) is widely used in low-voltage distribution equipment, is used to the line disconnection when there is the failure conditions such as leakage current, short circuit, overvoltage, under-voltage, thus protecting user or electrical equipment。Currently used intelligent micro-circuit breaker all at least possesses the function of two aspects: first; the voltage of measurement electric line and/or current signal; for monitoring and send control signal when circuit breaks down judging; make the actuating mechanism action of chopper; faulty line is cut off, thus protecting the safety of user or electrical equipment。Second, the information such as state of measured voltage and/or current signal and chopper, all can communicate for long-range monitoring。But, currently used miniature circuit breaker is all integrated design, namely for measuring the transformer of voltage and/or current signal, for measurement signal is processed and the chip communicated, for transmitting the path of control signal, and the electric magnet for cut-out electric line, drive mechanism etc. is all disposed within same housing, make for measuring strong power part circuit with action executing (such as, for domestic circuit, voltage levvl is 220V, for industrial circuits, voltage levvl is 380V), with for information processing with the weak current part circuit communicated (such as, in general at below 5V) between adopt integration fixing connection。It is that such design brings problematically, owing to strong power part circuit and weak current part circuit are in same closing housing, weak current part circuit is easily subject to interference, affects its stability。Further, when miniature circuit breaker there being a part break down, then whole device must be changed。
Summary of the invention
In view of this, one of purpose of disclosure embodiment is in that to provide a kind of modular intelligent micro-circuit breaker, strong power part circuit and weak current part circuit are separately designed as independent module by it, pluggable interface is used to be attached between the two, thus realizing modular design, independent production, the respectively use of assembling and Standardization Communication interface is conducive to be conducive to expanded application。
First aspect according to the disclosure, it is provided that a kind of miniature circuit breaker, including the first module, is configured to the electric current of measurement circuitry and/or voltage and sends measurement signals, and according to control signal, described circuit being disconnected;Second module, is configured to meet predetermined condition according to described measurement signals and sends described control signal;And interface, it forms pluggable connection respectively with described first module and described second module, and is configured to transmit described measurement signals and described control signal between described first module and described second module。
One embodiment of the first aspect according to the disclosure, wherein said interface includes: first connection path, is configured such that described measurement signals can be received by described second module;And second access path, it being configured such that described control signal can be received by described first module, wherein said first connection path is separate with described second access path。
One embodiment of the first aspect according to the disclosure, wherein said first module includes measuring unit, is configured to measure electric current and/or the voltage of described circuit;Performance element, is configured to according to described control signal, described circuit be disconnected;And power subsystem, it is configured to obtain power from described circuit and powers for for described miniature circuit breaker。
One embodiment of the first aspect according to the disclosure, wherein said second module includes: control unit, is configured to meet described predetermined condition according to described measurement signals and sends described control signal;And/or communication unit, it is configured to according to different communication protocol, described measurement signals and/or described control signal be changed, to be communicated by external communication interface and outside。
One embodiment of the first aspect according to the disclosure, wherein said measuring unit includes current sampling devices and/or voltage sample device。
One embodiment of the first aspect according to the disclosure, wherein said current sampling devices is a phase or heterogeneous zero sequence current mutual inductor。
One embodiment of the first aspect according to the disclosure, wherein said voltage sample device is a phase or ployphase voltages transformer。
One embodiment of the first aspect according to the disclosure, wherein said performance element includes: solenoid or relay, is configured to send according to described control signal trigger signal。
One embodiment of the first aspect according to the disclosure, wherein also includes: actuating mechanism, is configured to according to described triggering signal, described circuit be disconnected。
One embodiment of the first aspect according to the disclosure, wherein said power subsystem includes wave filter and/or Switching Power Supply。
One embodiment of the first aspect according to the disclosure, wherein said second module also includes: A/D converting unit, is configured to described measurement signals is converted to digital signal;And/or alarm unit, it is configured to send alarm signal according to described control signal。
Accompanying drawing explanation
Now will only by way of example, it is described with reference to appended accompanying drawing embodiment of this disclosure, wherein:
Figure 1A schematically illustrates the exploded perspective view of the miniature circuit breaker according to disclosure embodiment;
Figure 1B schematically illustrates the axonometric chart of the miniature circuit breaker according to disclosure embodiment;
Fig. 2 schematically illustrates the module map of the miniature circuit breaker according to disclosure embodiment;
Fig. 3 schematically illustrates the miniature circuit breaker that an embodiment operation is three-phase electric leakage protection device according to the disclosure;
Fig. 4 schematically illustrates the interface of the miniature circuit breaker of an embodiment according to the disclosure as shown in Figure 3;
Fig. 5 schematically illustrates the miniature circuit breaker protecting device according to another embodiment of the disclosure operation for power supply over-and under-voltage;And
Fig. 6 schematically illustrates the interface of miniature circuit breaker according to another embodiment of the disclosure as shown in Figure 5。
Detailed description of the invention
Now it is specifically described in conjunction with accompanying drawing embodiment of this disclosure。It should be noted that, similar parts or functional unit are likely to by accompanying drawing use same numeral sign。Appended accompanying drawing is intended only to illustrate and embodiment of the disclosure。Those skilled in the art can obtain replaceable technical scheme from the description below not necessarily departing from the basis of disclosure spirit and scope。
Figure 1A schematically illustrates the exploded perspective view of the miniature circuit breaker according to disclosure embodiment, illustrated therein is the view that the second module 20 separates from miniature circuit breaker 1。Miniature circuit breaker 1 includes the first module 10 and the second module 20, and wherein, the second module 20 is attached along shown in dotted line in figure by pluggable interface 30 and the first module 10。The profile of the first module 10 shown in figure is U-type groove is preferred exemplary, those skilled in the art can according to circumstances the profile of the first module 10 and the second module 20 be designed as be suitable for both mutually plug other shapes being attached。Interface 30 is shown as two parts pin in figure ia, is respectively used to power transmission and signal transmission。Alternatively, this two parts pin can be according to circumstances designed as with identical profile continuous arrangement by those skilled in the art。Second module 20 also includes external communication interface 50, and it makes this miniature circuit breaker 1 relevant monitoring and status information to be reported to host computer, for instance for remotely monitoring。Further illustrating actuating mechanism 122-1 and the 122-2 that the first module 10 includes in Figure 1A, the live wire in supply line and zero line are disconnected by respectively according to control signal T1。
Figure 1B schematically illustrates the axonometric chart of the miniature circuit breaker according to disclosure embodiment。As it can be seen, after the first module 10 and the second module 20 be connected with each other by pluggable interface 30, external communication interface 50 is exposed to, for and host computer, for instance remote supervisory and control(ling) equipment communicates, to the relevant monitoring of remote supervisory and control(ling) equipment report and status information。
Fig. 2 schematically illustrates the module map of the miniature circuit breaker according to disclosure embodiment。As it can be seen, modular intelligent micro-circuit breaker 1 includes: the first module the 10, second module 20 and interface 30。Described first module 10 includes measuring power supply 11, and described measuring unit 11 is configurable for electric current and/or the voltage of measurement circuitry, and sends the measurement signals of electric current and/or voltage to the second module 20。Miniature circuit breaker 1 also includes performance element 12, and described performance element 12 receives the control signal T1 from the second module, and according to this control signal T1, described circuit is disconnected。Specifically, performance element 12 includes relay 121 or solenoid 123。Miniature circuit breaker 1 also includes the actuating mechanism 122 matched with performance element 12。Solenoid 123 or relay 121 send triggering signal, actuating mechanism 122, for instance for actuating mechanism 122-1 and the 122-2 shown in Figure 1A and 1B according to this control signal T1 to actuating mechanism 122 so that described circuit disconnects。Generally, relatively low from the voltage levvl of the control signal T1 of the second module 20, it is such as below 5V, such as 3.3V etc., and the voltage levvl of the circuit that performance element 12 to disconnect is higher, be such as 220V or 110V, it is therefore desirable to received control signal T1 by relay 121, and drive actions mechanism 122 come off voltage level higher use electric line。First module 10 also includes power subsystem 13, and it is from obtaining power electric line, the operation for miniature circuit breaker 1 provides power supply。
Second module 20 includes A/D converting unit 23, control unit 21, communication unit 22 and alarm unit 24。Described A/D converting unit 23 is arranged to the analogue signal of measurement unit 11 in the future and is converted to digital signal, processes for control unit 21。Described control unit 21 is configured to judge for the digital measurement signal after conversion, to determine if to meet predetermined condition, if once meet predetermined condition, then sends described control signal T1 to described first module 10。Described predetermined condition, for instance can be the measurement result of voltage or electric current beyond predetermined threshold, or the measurement result of voltage or electric current is beyond one section of delay time of predetermined threshold, and this predetermined threshold and/or this delay time can also be adjusted or set。Described control unit 21 can be the microcomputer control unit such as single-chip microcomputer or digital processing dsp chip。Communication unit 22 is arranged to control signal T1 control unit 21 sent and other control units 21 received signal carries out the conversion between different communication protocol, it is suitable in the industrial communication networks such as such as Ethernet, CAN, RS-484, using these signals by external communication interface, purpose is such as in that to communicate with host computer, it is achieved the functions such as such as long-range monitoring。Selectively, the second module 20 can also include alarm unit 24, and described alarm unit 24 is configured as also sending alarm signal when control unit 21 sends control signal T1, for instance illustrates with lamp flicker or sends buzz prompting user etc.。
Interface 30 forms pluggable connection respectively with described first module 10 and described second module 20, and is configured to transmit described measurement signals and described control signal T1 between the first module 10 and the second module 20。Further, interface 30 includes the pin for power transmission and signal transmission, as shown in Figure 1A。More specifically, the pin for signal transmission included by interface 30, include again two physically independent paths, i.e. first connection path 31 and the second access path 32, also referred to as first line 31 and the second circuit 32。Described first connection path 31 is configured to send the measurement signals of voltage and/or electric current to the second module 20;Second access path 32 is configured to send described control signal T1 to the first module 10。Specifically, for instance, first connection path 31 may be implemented as CAN conventional in industrial circle or MODBUS bus。In current normally used all-in-one micro chopper, CAN or MODBUS bus are also equipped with the pin or the circuit that are suitable to transmit control signal, control signal can also be received in theory and then realize the function disconnected by circuit, but, in practical application, the control signal (such as 3.3V voltage) transmitted in CAN or MODBUS bus, time be subjected to the interference from high voltage signal (such as 220V voltage), the fault of miniature circuit breaker misoperation occurs。By transmitting the first connection path 31 of measurement signals by being used for and be used for transmitting the second discrete setting of access path 32 of control signal T1, improve the anti-interference of miniature circuit breaker 1 so that it is more reliable and more stable。
By the miniature circuit breaker of the disclosure so that strong power part and the weak current part of miniature circuit breaker are separated。First module 10 is forceful electric power module, be suitable to measure voltage and/or the electric current of the use electric line that such as voltage is 220V or 110V, and at circuit, abnormal conditions occur, for instance and action when electric leakage or overtension occurring or be too low, according to the control signal from the second module 20, circuit is disconnected。And the second module 20 is light current module, be suitable to the measurement signal of voltage and/or electric current is processed and judged, control signal is sent to the first module 10 so that circuit is disconnected by the first module 10, thus realizing including user and by the function of electric line when meeting predetermined condition。
Fig. 3 schematically illustrates the miniature circuit breaker that an embodiment operation is three-phase electric leakage protection device according to the disclosure。In this embodiment, miniature circuit breaker is used to three-phase electric leakage protection device。As it can be seen, L1, L2, L3 are three-phase electric line, N is zero line, also referred to as the neutral conductor, for the three-phase four-wire system configuration that this area is common。Certainly, miniature circuit breaker can be used for other conventional configurations of this area, for instance single-phase, i.e. a live wire and a zero line。First module 10 of miniature circuit breaker accesses three-phase electric line, gathers current signal by measuring unit 11 from three-phase electric line。In this embodiment, measuring unit 11 is zero sequence current mutual inductor, and it act as in detection three-phase electric line whether leakage current occur。Specifically, when the situation of such as damage in insulation occurs three-phase electric line, circuit occurs leakage current, the personal safety of user can be threatened, it is necessary to circuit is disconnected by miniature circuit breaker in time, to ensure the personal safety of user。When leakage current occurs in three-phase electric line, flowing through zero-sequence current in ZCT, namely measuring unit 11 sends S1 and S2 signal by the first connection path 31 of interface 30 to the second module 20, and this S1 and S2 signal is leakage current signal in this specific embodiment。This leakage current signal S1 and S2 indicates and leakage current fault occurs in three-phase electric line。Detected leakage current signal is changed and is processed by the A/D converting unit 23 of the second module 20 and control unit 21 respectively, when a predetermined condition is satisfied, second module 20 sends control signal T1, and it is sent to the first module 10 by the first connection path 31 of interface 30。Described predetermined condition can be such as exceed predetermined threshold as leakage current signal S1, S2, or exceedes one period of scheduled time of predetermined threshold etc.。First module 10, when receiving control signal T1, is sent action command by solenoid 123 to actuating mechanism 122, and three-phase electricity consumption circuit is disconnected by actuating mechanism 122, thus protecting the personal safety of user。The power supply that wherein miniature circuit breaker work is required is provided by the power subsystem 13 of the first module 10, specifically, power subsystem 13 can include wave filter or switching power devices etc., so that the work for miniature circuit breaker particularly the second module 20 provides the stable power supply cleaned, be conducive to improving the interference free performance of miniature circuit breaker。
Fig. 4 schematically illustrates the interface of the miniature circuit breaker of an embodiment according to the disclosure as shown in Figure 3。Which schematically illustrates the direction of main signal path included in interface 30 and signal。As it can be seen, control signal T1 sends from the second module 20 to the first module 10, leakage current signal S1, S2 send from the first module 10 to the second module 20, for generating the foundation of control signal T1。Power supply signal Vcc and ground signalling GND is provided by the power module 13 of the first module 10, and Vcc is such as 5V or 3.3V, depends on the voltage requirements of the second module 20。
Fig. 5 schematically illustrates the miniature circuit breaker protecting device according to another embodiment of the disclosure operation for power supply over-and under-voltage。In this embodiment, miniature circuit breaker is used to power supply overvoltage and under-voltage protection device。The power supply of common electrical appliance is desirable that have certain voltage, if supply voltage is too high or too low, all can bring infringement for electrical appliance。In this embodiment, miniature circuit breaker is arranged to provides protection for supply voltage too high (being called overvoltage) or brownout (being called under-voltage) for electrical appliance。
As it is shown in figure 5, the control unit 21 of the second module 20 can be 5V or 3.3V according to the power Vcc provided by the power subsystem 13 of the first module 10 and ground connection GND, Vcc, depend on the requirement of control unit 21。The measuring unit 11 of the first module 10 can be such as voltage sampling circuit, or it is a phase or ployphase voltages transformer, the voltage signal of its measurement circuitry, voltage signal measured shown in figure is three-phase voltage measurement signals LV1, LV2, LV3, this three-phase voltage measurement signals LV1, LV2, LV3 are sent to the second module 20 by interface 30, and carry out digital-to-analogue conversion by the A/D converting unit 23 of the second module 20, to be further used for process and the judgement of control unit 21。A/D converting unit 23 and control unit 21 can utilize integrated digital processing chip DSP to realize, alternatively, it is also possible to use independent modular unit to realize。Control unit 21 according to three-phase voltage measurement signals LV1, whether LV2, LV3 meet predetermined condition sends control signal T1 and T2, this predetermined condition such as can exceed predetermined threshold according to three-phase voltage measurement signals LV1, LV2, LV3, or exceed one period of scheduled time of predetermined threshold and determine。When predetermined condition meets, control unit 21 sends control signal T1, T2 to the performance element 12 of the first module 10。In this embodiment, performance element 12 includes relay 121, for instance for magnetic latching relay, so, control signal T1, T2 can be trigger-type signal。Relay 121 sends triggering signal according to the control signal T1 received, T2 to actuating mechanism 122 (in Fig. 5 not shown) and makes its action thus being disconnected by circuit。
Additionally, second module 20 also includes communication unit 22, it couples with control unit 21 and by described three-phase voltage measurement signals LV1, LV2, LV3, described control signal T1, T2 etc. change as needed between different communication protocol, for by external communication interface 50 (in Fig. 5 not shown) with host computer communication to realize such as the functions such as remotely monitoring。
Meanwhile, the second module 20 also includes alarm unit 24, and it is for indicating the duty of miniature circuit breaker。Exemplarily, when relay 121 is aging or working condition deteriorates and occurs that such as melting the faults such as weldering causes that relay 121 cannot be operating normally, alarm unit 24 can send instruction by the form of warning light or buzz, notifies that fault is processed by user。Owing to the miniature circuit breaker of the disclosure have employed modularized design, therefore when such as relay 121 breaks down, it is possible to only change the first module 10, without changing whole miniature circuit breaker。
Fig. 6 schematically illustrates the interface of miniature circuit breaker according to another embodiment of the disclosure as shown in Figure 5。Which schematically illustrates the direction of main signal path included in interface 30 and signal。As shown in the figure, control signal T1, T2 send from the second module 20 to the first module 10, send to the second module 20 from voltage measurements signal LV1 (A) of A, B, C three-phase, LV2 (B), LV3 (C) from the first module 10, for generating the foundation of control signal T1, T2。Power supply signal Vcc and ground signalling GND is provided by the power module 13 of the first module 10, and Vcc is such as 5V or 3.3V, depends on the voltage requirements of the second module 20。
It addition, the interface 30 of the such as miniature circuit breaker of disclosure embodiment shown in Fig. 4 and Fig. 6, the merely exemplary main signal path illustrated in different embodiments, or it is called the pin that interface is defined。In actual applications, owing to the miniature circuit breaker of disclosure embodiment can provide the function of protective device of leakage current and the function of power supply overvoltage and undervoltage protection device simultaneously。In this case, interface 30 should include the signal path for current measurement result and voltage measurements or be called pin。Those skilled in the art can make suitable amendment as the case may be according to the instruction of the disclosure。
By the modularization intelligent miniature circuit breaker of disclosure embodiment, it is achieved that the separately design of forceful electric power circuit and light current circuit, it is simple to separately design exploitation, it is to avoid design iterations。Pluggable Interface design facilitates implementation the modular arrangements of multiple communication interface。Due to the separately design of strong and weak circuit, provide special control signal path especially in the interface so that the capacity of resisting disturbance of light current circuit is strengthened, improve the reliability of miniature circuit breaker。Light current module and forceful electric power module is connected, it is simple to realizing the field upgrade of hardware and the upgrading of whole product from now on, the product of different series can exchange forceful electric power module and light current module, at utmost sinking low production cost by the STD bus defined。Modularity, pluggable design facilitate production and the maintenance of miniature circuit breaker。
Will be appreciated by disclosure those skilled in the relevant art by instruction given in above description and relevant drawings, many modification of the disclosure described herein and other embodiment。Therefore, it being understood that embodiment of the present disclosure is not limited to disclosed detailed description of the invention, and modification and other embodiment are intended to include within the scope of the present disclosure。In addition, although example embodiment is described by above description and relevant drawings under the background of some example combination form of parts and/or function, it will be appreciated that, it is possible to provided the various combination form of parts and/or function without departing from the scope of the present disclosure by alternate embodiment。On this point, for instance, also it is expected with other combining form of different parts explicitly described above and/or function and is within the scope of the present disclosure。Although being employed herein concrete term, but they only are not intended to limit so that general and illustrative implication uses。

Claims (11)

1. a miniature circuit breaker (1), including:
First module (10), is configured to the electric current of measurement circuitry and/or voltage and sends measurement signals, and according to control signal (T1), described circuit being disconnected;
Second module (20), is configured to meet predetermined condition according to described measurement signals and sends described control signal (T1);And
Interface (30), it forms pluggable connection respectively with described first module (10) and described second module (20), and is configured to transmit described measurement signals and described control signal (T1) between described first module and described second module。
2. miniature circuit breaker according to claim 1, wherein said interface (30) including:
First connection path (31), is configured such that described measurement signals can be received by described second module (20);And
Second access path (32), is configured such that described control signal (T1) can be received by described first module (10),
Wherein said first connection path (31) is separate with described second access path (32)。
3. miniature circuit breaker according to claim 1 and 2, wherein said first module (10) including:
Measuring unit (11), is configured to measure electric current and/or the voltage of described circuit;
Performance element (12), is configured to according to described control signal (T1), described circuit be disconnected;And
Power subsystem (13), is configured to obtain power from described circuit and powers for for described miniature circuit breaker (1)。
4. miniature circuit breaker according to claim 1 and 2, wherein said second module (20) including:
Control unit (21), is configured to meet described predetermined condition according to described measurement signals and sends described control signal (T1);And/or
Communication unit (22), is configured to according to different communication protocol, described measurement signals and/or described control signal (T1) be changed, to be communicated by external communication interface 50 and outside。
5. miniature circuit breaker according to claim 3, wherein said measuring unit (11) includes current sampling devices and/or voltage sample device。
6. miniature circuit breaker according to claim 5, wherein said current sampling devices is a phase or heterogeneous zero sequence current mutual inductor。
7. miniature circuit breaker according to claim 5, wherein said voltage sample device is a phase or ployphase voltages transformer。
8. miniature circuit breaker according to claim 3, wherein said performance element (12) including: solenoid (123) or relay (121), is configured to send according to described control signal (T1) trigger signal。
9. miniature circuit breaker according to claim 8, wherein also includes: actuating mechanism (122), is configured to according to described triggering signal, described circuit be disconnected。
10. miniature circuit breaker according to claim 3, wherein said power subsystem (13) includes wave filter and/or Switching Power Supply。
11. miniature circuit breaker according to claim 4, wherein said second module (20) also includes:
A/D converting unit (23), is configured to described measurement signals is converted to digital signal;And/or
Alarm unit (24), is configured to send alarm signal according to described control signal (T1)。
CN201410682105.XA 2014-11-24 2014-11-24 Miniature circuit breaker Active CN105703320B (en)

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US20090065338A1 (en) * 2006-05-04 2009-03-12 Moeller Gmbh Circuit breaker for motor protection and/or line protection
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107066766A (en) * 2017-05-24 2017-08-18 福州大学 A kind of miniature circuit breaker modular design method
CN107066766B (en) * 2017-05-24 2019-12-31 福州大学 Modular design method of miniature circuit breaker

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