CN101373690A - Shunt release capable of being controlled by exterior power-off protection signal - Google Patents

Shunt release capable of being controlled by exterior power-off protection signal Download PDF

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Publication number
CN101373690A
CN101373690A CNA200810083340XA CN200810083340A CN101373690A CN 101373690 A CN101373690 A CN 101373690A CN A200810083340X A CNA200810083340X A CN A200810083340XA CN 200810083340 A CN200810083340 A CN 200810083340A CN 101373690 A CN101373690 A CN 101373690A
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power
circuit
output
subjected
protection signal
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万家盛
汪志强
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Individual
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Abstract

The invention relates to a shunt release which can be controlled by an external power-off protection signal, and is arranged on a power line. The shunt release comprises a casing, and a tripping coil and a switch control circuit which are positioned in the casing. The switch control circuit comprises an external power-off signal receiving unit used for receiving an external power-off control signal and converting a semaphore; a power supply unit used for obtaining a real-time voltage from the power line, converting the voltage to a stable voltage and supplying power to the control circuit; and a command processing unit used for receiving the semaphore so as to generate a triggering signal and enable the shunt release to conduct an off-action.

Description

Can be subjected to the shunt release of exterior power-off protection signal controlling
Technical field
The present invention relates to the upright product of a kind of low-voltage electrical apparatus, the equipped shunt release that uses of specifically a kind of and circuit breaker.
Background technology
The existing shunt release equipped with circuit breaker; as with earth leakage circuit-breaker; claim the shunt release that air switch is equipped mutually again, generally comprise shell, be provided with tripping mechanism, mutual inductor, control circuit and the binding post of forming by tripping coil and armature etc. etc. in the enclosure.Described mutual inductor is enclosed within on phase line and the zero line, electric current on phase line and zero line changes, then mutual inductor can produce electric current, this electric current input control circuit, controllable silicon conducting in the control circuit, coil forms the loop between zero line and phase line, and coil produces magnetic field and makes armature movement, thereby drive the circuit breaker action, and open circuit.Behind the equipped air switch of this shunt release, between zero line and phase line, during current imbalance, can cut off the electricity supply in time, can protect people's life and property safety effectively.But this shunt release has only when just playing a role during current imbalance between zero line and phase line.And when running into the timely disconnection of other situation needs air switch, but can't realize.As when running into fire alarm, just manually cut off the electricity supply after generally all needing the fire fighter to reach the spot at present.For another example, in the electrical management process, as run into the electronics envelope that has the people illegally to become flexible ammeter box, release can not make the timely open circuit of circuit breaker; Generally speaking, the action of this shunt release all is failure to actuate under other situation except when just move during current imbalance between zero line and phase line, and therefore, with the various circuit breakers of this shunt release, its purposes has been subjected to greatly restriction.In addition, the circuit breaker of this band shunt release, after circuit breaker action, the disconnection whether its circuit breaker is real, promptly the operating state people of circuit breaker can't promptly not know whether be to have finished the action of opening circuit veritably as can be known.Moreover, the defective that former shunt release burns coil when also existing its coil frequently to thread off easily.Divide Chinese patent by retrieval, the patent documentation of the relevant shunt release of part is disclosed though find Chinese patent literature, but there is the circuit complexity mostly in the circuit of these releases, the defective that versatility is not strong, promptly can only be at a certain or some special-purpose, the release that uses as the IC-card kilowatt-hour meter etc.
Summary of the invention
Main purpose of the present invention is, a kind of shunt release that is subjected to the exterior power-off protection signal controlling is provided, in order to solve above-mentioned technical problem.Providing a kind of can use with any circuit breaker is equipped, and can be subjected to the shunt release of the exterior power-off protection signal controlling of at least one;
Another goal of the invention of the present invention is: this shunt opening release can detect the operating state of switch behind the circuit breaker open circuit;
Another goal of the invention of the present invention is: this shunt opening release can produce when zero line and phase line are unbalance equally and thread off, the action of linkage circuit breaker, and when the release running hours, coil can not burnt;
Technical scheme of the present invention is: expand existing shunt release function; use existing earth leakage protective device only when current unbalance; just play the function of power-off protection; expand to and overload, overvoltage condition, outside occur at power line and have in light current power-off protection signal or the forceful electric power power-off protection signal; its release all produces action; thereby the linked circuit breaker outage reaches the function that power-off protection has, thereby has expanded existing shunt release purposes.
For achieving the above object; the technical solution used in the present invention is; a kind of shunt release that is subjected to the exterior power-off protection signal controlling is provided; be arranged on the power line; it comprises a shell; and the tripping coil and the ON-OFF control circuit that are positioned at described shell, wherein, described ON-OFF control circuit comprises:
One outside power-off signal receiving element in order to receiving outside outage control signal, and is converted to a semaphore;
One power subsystem obtains real-time voltage from described power line and is converted to a stable voltage, is described control circuit power supply;
One command process unit receives described semaphore, thereby produces a triggering signal, described shunt release is produced disconnect action;
Preferable, described power subsystem comprises: a rectification circuit, and it links together by described tripping coil and described phase line and zero line;
Preferable, the minus earth of described rectification circuit, the positive pole output of described rectification circuit; Also comprise:
One electric capacity and a voltage-stabiliser tube parallel connection, the one parallel connected end is connected its another parallel connected end ground connection with the positive pole output of described rectification circuit;
Preferable, described outside power-off signal receiving element is one first photoelectrical coupler, its input is received the break signal of being sent by external control devices, thereby produces described semaphore at the output of described first photoelectrical coupler;
Preferable, described command process unit comprises: a controllable silicon, and it is arranged between the described rectification circuit both positive and negative polarity, and described silicon controlled control end is connected with the output of described first photoelectrical coupler; Described controllable silicon plus earth;
Preferable, described exterior power-off protection signal receiving unit and command process unit are served as by a relay, one end and the described zero line of described relay moving contact join, and the other end of described relay moving contact and the input of described tripping coil join;
Preferable, also comprise: a positive temperature coefficient resistor is arranged between described tripping coil input and the described rectification circuit;
Preferable, also comprise: a switch working state detecting unit, whether produce action in order to detect described release, it comprises: one second photoelectrical coupler, its receiving terminal is connected with described rectification circuit both positive and negative polarity, and the output of described second photoelectrical coupler is connected with long-range accepting device;
Preferable, also comprise: a state processing unit, it comprises:
One power line sampling subelement, it is in order to characterize the semaphore of power state from the set power line collection of described shunt release;
One judges the abnormality subelement, and it receives the semaphore of above-mentioned sign power state, output one control signal under abnormality;
Preferable, described power line sampling subelement is a current transformer that is arranged on the phase line, and described judgement abnormality subelement is that current overload is handled unusually, and it comprises:
One first sample circuit, it is that the resistance and the electric capacity of a series connection is formed, described resistance is connected described electric capacity one end ground connection with current transformer output on being arranged on described phase line;
One first comparison circuit, it is one first comparator, the normal phase input end of described first comparator is connected with the serial connection point of described resistance and electric capacity, the inverting input of described first comparator is connected with described power subsystem output by a slide rheostat, obtain a voltage, its output is connected with described silicon controlled control end;
Preferable, described judgement abnormality subelement is that overvoltage is handled unusually to electric current, it comprises:
One second sample circuit, it comprises: the sample resistance of a series connection is right, and the one end is connected other end ground connection with the positive pole output of described rectification circuit;
One circuit, it comprises: the resistance of a series connection is right, and the one end is connected other end ground connection with described power subsystem output;
One second comparison circuit, it is one second comparator, the right serial connection point of the inverting input of described second comparator and the resistance of described series connection is connected, the right serial connection point of the normal phase input end of described second comparator and the sample resistance of described series connection is connected, and its output is connected with described silicon controlled control end;
Preferable, described power line sampling subelement is to be arranged on the current transformer on the phase line and to be arranged on a current transformer on the zero line, and described judgement abnormality subelement is that current unbalance is handled unusually, and it comprises:
One the 3rd compares subelement, it is one the 3rd comparator, the normal phase input end of described the 3rd comparator is connected with current transformer output on being arranged on described phase line, the inverting input of described the 3rd comparator is connected with current transformer output on being arranged on described zero line, and its output is connected with described silicon controlled control end;
Preferable, described power line sampling subelement is a current transformer that is arranged on the phase line, and described judgement abnormality subelement is that current unbalance is handled unusually, and it comprises:
One the 3rd sample circuit, it is that a parallel resistor and electric capacity are formed, its parallel connected end is connected with current transformer output on being arranged on phase line, obtains the first sampled signal amount;
One the 3rd comparison circuit, it is one first integrated circuit, the input port of the described first integrated circuit appointment obtains the described first sampled signal amount, its signal with described first integrated circuit of input compares acquisition, when confirming that imbalance state takes place, export a unbalance control signal, give described silicon controlled control end;
Preferable, also comprise: a unusual indication subelement comprises at least one light-emitting diode, and it is connected with the output of described comparator, the other end ground connection of described light-emitting diode.
The present invention is provided with controlled components and parts owing to having adopted at control circuit, as relay, controllable silicon or photoelectrical coupler etc., combine with electromagnet to play and to accept the exterior power-off protection signal controlling and be implemented in application under the multiple occasion, expanded the application of existing shunt release dexterously; The present invention still to existing miniature circuit breaker by transforming simply, do not need die sinking manufacturing again, just can realize long-range or directly control the switch of circuit breaker, and know the operating state of circuit breaker.
Description of drawings
Figure 1A can be subjected to the mechanical structure schematic diagram of a kind of embodiment of shunt release of exterior power-off protection signal controlling for the present invention;
Figure 1B can be subjected to the illustrative view of functional configuration of a kind of embodiment of shunt release of exterior power-off protection signal controlling for the present invention;
Fig. 2 is a kind of control circuit theory structure schematic diagram of Figure 1A illustrated embodiment;
Fig. 3 is second kind of control circuit theory structure schematic diagram of Figure 1A illustrated embodiment;
Fig. 4 is the third control circuit theory structure schematic diagram of Figure 1A illustrated embodiment;
Fig. 5 is the 4th a kind of control circuit theory structure schematic diagram of Figure 1A illustrated embodiment;
Fig. 6 is the structure-improved schematic diagram to circuit shown in Figure 2;
Fig. 7 is the structure-improved schematic diagram to circuit shown in Figure 3;
Fig. 8 is the structure-improved schematic diagram to circuit shown in Figure 4;
Fig. 9 is the structure-improved schematic diagram to circuit shown in Figure 5;
Figure 10 A can be subjected to the functional block diagram of the another kind of embodiment control circuit of shunt release of exterior power-off protection signal controlling for the present invention;
Figure 10 B can be subjected to the functional block diagram one preferred circuit structure chart of the another kind of embodiment of shunt release of exterior power-off protection signal controlling for the present invention.
Embodiment
Below in conjunction with accompanying drawing, be described in more detail with other technical characterictic and advantage the present invention is above-mentioned.
See also Figure 1A, Figure 1A can be subjected to the mechanical structure schematic diagram of a kind of embodiment of shunt release of exterior power-off protection signal controlling for the present invention.It comprises: shell 1, be provided with electromagnet 2, control circuit 3, current transformer 4, power-line terminal 5 and the signal lead-in clamp 6 that is made of tripping coil 21, armature 22 etc. in described shell 1, described signal lead-in clamp 6 can insert peripheral control signal.Described current transformer 4 is enclosed within respectively on phase line L and the zero line N; and be electrically connected with described control circuit 3, tripping coil 21, power-line terminal 5 and signal lead-in clamp 6, described signal lead-in clamp 6 is used for being connected with the equipment of outside generation power-off protection signal.
See also Figure 1B, it is the illustrative view of functional configuration of an embodiment of the present invention, and it is arranged on the power line, it comprises control circuit, described control circuit 3 comprises: an outside power-off signal receiving element 03 in order to receiving outside outage control signal, and is converted to a semaphore; One power subsystem 04 obtains real-time voltage from described power line and is converted to a stable voltage, is described control circuit power supply; One command process unit 02 receives described semaphore, thereby produces a triggering signal, gives described tripping coil 01 (be tripping coil 21 among above-mentioned Figure 1A), thereby described shunt release being produced disconnect moves.
See also Fig. 2, Fig. 2 is a kind of control circuit 3 theory structure schematic diagrames of Figure 1A illustrated embodiment.From figure as can be known; control circuit 3 comprises: ON-OFF control circuit; described ON-OFF control circuit comprises integrated circuit (photoelectrical coupler) IC2; resistance R 1; R2; controllable silicon Q1; rectifier bridge D1-D4 and the electromagnet TQ (label of the electromagnet in Figure 1A is 2) that forms by coil and armature etc.; when 1 of integrated circuit (IC) 2; when 2 pin receive the circuir break protective signal that is sent by external control devices; 3 of integrated circuit (IC) 2; 4 pin conductings; the control pin of controllable silicon Q1 obtains Control current and conducting from 4 pin of integrated circuit (IC) 2; thereby make electromagnet have electric current to pass through; electromagnet TQ disconnects K switch by link gear; a link gear part described here is arranged on the K switch (also claiming to open circuit); another part is the driving lever equipped mutually with armature; armature movement drives the driving lever action; the driving lever action drives the corresponding mechanism action that is arranged in the K switch again; this part mechanism, already used very general in existing circuit breaker.This is that this shunt opening release is subjected to the exterior power-off protection signal and the operation principle of cutting off the power supply.
Described control circuit 3 also comprises the switch working state testing circuit, described switch working state testing circuit comprises resistance R 1 and integrated circuit (IC) 1 (photoelectrical coupler), after K switch disconnects, the also no-voltage output thereupon of rectifier bridge D1-D4 of power supply is provided for The whole control circuit 3,1 of integrated circuit (IC) 1,2 pin do not have electric current to pass through, 3 of integrated circuit (IC) 1,4 pin disconnect, at this moment, corresponding device on the external control devices produces action, as detect lamp and extinguish, sound etc., hence one can see that, and K switch is in off-state, and this is the operation principle of the operating state of the present invention's energy sense switch K; The resistance R 2 that is adopted between electromagnet TQ and rectifier bridge D1-D4 among the present invention is positive temperature coefficient resistor, its effect is when electric current is excessive, it is big that the resistance of resistance R 2 becomes, thereby the coil that has guaranteed electromagnet TQ is not burnt under the situation of continuous operation, and then has improved functional reliability of the present invention.
The said external control appliance can be any equipment or device that can produce the power-off protection signal, as applying the present invention on the fire protection equipment, as with the smoke detector mating reaction, so only need be with 3 of the signal output part of the control circuit of smoke detector and integrated circuit (IC) of the present invention 2,4 pin join, when smoke detector has perceived smog, it is sending other alarm signal (sound, light signal) time, also to 1 of integrated circuit (IC) 2,2 human hair combing wastes have gone out the power-off protection signal, at this moment, circuit of the present invention is work just, thereby cut off the electricity supply, for fire-fighting work has won valuable time, because the outage of fire-fighting traditionally is just artificial outage after the fire fighter reaches the spot; Meanwhile, integrated circuit (IC) 1 also can be sent detection signal, and whether sense switch K outage is successful; The air switch that will have release of the present invention for another example uses on electric quantity metering box and when linking to each other with electronics envelope or electronic group encapsulation, when the people illegally moves envelope, electronics envelope or electronic group encapsulation will be given the control circuit 3 input power-off signals of this release, the present invention will disconnect air switch, its operation principle and roughly the same above-mentioned, exactly 1,2 and electronics of integrated circuit (IC) 2 in of the present invention sealed or the output of electronic group encapsulation joins and gets final product, as the moving envelope of people, electronics envelope or electronic group encapsulation send control signal, thereby cause circuit working of the present invention, and cut off K switch.
Enumerate two kinds of examples except above-mentioned; in fact shunt release of the present invention is can be with any external control devices that needs power-off protection effect of matching theoretically; as be used for the Long-distance Control of electric administrative department to earth leakage protective device; it can be implemented in remote control center by wired or wireless; even the disconnection that comes control switch K by the internet; just as long as the integrated circuit (IC) 2 among the present invention can obtain circuir break protective signal; shunt release of the present invention just can be worked, thereby drives the air switch outage.Certainly, shunt release of the present invention not only just can be equipped with use by air switch, can also use with other circuit breaker is equipped.
See also Fig. 3, Fig. 3 is second kind of control circuit, the 3 theory structure schematic diagrames of Figure 1A illustrated embodiment.Circuit theory shown in Figure 3 is compared with circuit theory shown in Figure 2; its general structure is identical; different is that control circuit 3 has also increased the current unbalance control circuit; this circuit is also with regard to traditional and earth leakage protective device (some factory also claims the high breaking miniature circuit breaker) the current unbalance control circuit of equipped shunt release mutually; it comprises that (label among Fig. 1 is 4 to current transformer TA; down together); resistance R 3; R4; R5; integrated circuit (IC) 3; and capacitor C 1; C2; C3; C4; C5; voltage stabilizing didoe DW; diode D5; when the current imbalance of zero line N and phase line L; current transformer TA induces voltage signal; from 1 of integrated circuit (IC) 3; the input of 2 pin; 7 pin output voltages of integrated circuit (IC) 3; make controllable silicon Q1 conducting, thereby make electromagnet TQ energising, K switch is disconnected by link gear.Diode D5 does not have in the unbalance control circuit of primary current among Fig. 3, increases the purpose of diode D5, is to prevent that the current reflux of 4 pin of integrated circuit (IC) 2 from arriving 7 pin of integrated circuit (IC) 3.
Fig. 2 and embodiment shown in Figure 3 are the circuit theory diagrams that available outside light current is controlled this shunt opening release.In fact this shunt opening release also can be controlled with the external control devices of exportable forceful electric power signal, as the circuit theory diagrams of following Fig. 4 that will narrate and Fig. 5.
See also Fig. 4, Fig. 4 is the third control circuit 3 theory structure schematic diagrames of Figure 1A illustrated embodiment.Circuit theory shown in Figure 4 is compared with circuit theory shown in Figure 1, and its general structure is identical, and different is: integrated circuit (IC) among Fig. 12 has been replaced by relay J, and certainly, the relay J here also can replace with controllable silicon.When the relay J in the external control devices (or controllable silicon) conducting, electromagnet TQ forms the loop by resistance R 2 between phase line L and zero line N, and the electromagnet TQ action of switching on drives link gear then K switch is disconnected.The operation principle of integrated circuit (IC) 1 is identical with operation principle among Fig. 1, repeats no more here.
See also Fig. 5, Fig. 5 is the 4th kind of control circuit 3 theory structure schematic diagrames of Figure 1A illustrated embodiment.Circuit theory shown in Figure 5 is compared with circuit theory shown in Figure 4, and its general structure is identical, be not both the current unbalance control circuit that has increased shown in Fig. 3, the operation principle of this partial circuit and structure have been done detailed narration in Fig. 3, repeat no more here.
See also Fig. 6, Fig. 7, Fig. 6 is the structure-improved schematic diagram to circuit shown in Figure 2; Fig. 7 is the structure-improved schematic diagram to circuit shown in Figure 3.Fig. 6 compares with Fig. 3 with Fig. 2, Fig. 7; its general structure is identical; different is Fig. 6 and circuit shown in Figure 7; they are suitable for the external equipment that a plurality of (among the figure draw only gone out 4 external equipments) can produce the light current break signal and control a circuit breaker job by a release; one in these 4 external equipments can be smoke detector; the power-off protection signals that power-off protection signal that also can be control centre send by the internet or the envelope of the electronics on the ammeter box or electronic group encapsulation send etc. can make circuit breaker disconnect in the very first time.
See also Fig. 8 and Fig. 9, Fig. 8 is the structure-improved schematic diagram to circuit shown in Figure 4; Fig. 9 is the structure-improved schematic diagram to circuit shown in Figure 5.Fig. 8 compares with Fig. 5 with Fig. 4, Fig. 9, identical (the relay J among Fig. 4 and Fig. 5 of its general structure, be located among the external equipment 1-4 at Fig. 8 and Fig. 9, so do not draw), different is Fig. 8 and circuit shown in Figure 9, and they are suitable for the external equipment that a plurality of (among the figure draw only gone out 4 external equipments) can produce the forceful electric power break signal and control a circuit breaker job by a release.Circuit breaker was disconnected in the very first time.
Please refer to shown in Figure 10 A, it is the functional block diagram of the another kind of embodiment control circuit of the present invention; The difference of the functional block diagram of itself and above-mentioned Figure 1B is, also comprises: a state processing unit 05, and it comprises: power line sampling subelement, in order to gather the semaphore that characterizes power state from the set power line 07 of described shunt release; One judges the abnormality subelement, receives the semaphore of above-mentioned sign power state, exports a control signal under abnormality, and that described abnormality is meant is unbalance, overvoltage or overload.The control signal of exporting under the described abnormality is connected with described command process unit 02; thereby make described command process unit send control signal to described tripping coil 21; thereby make described power line disconnect; play the corresponding protection effect, and it is emphasized that this generation of opening circuit can recover.
Be directed to the functional block diagram of above-mentioned Figure 10 A, a kind of preferred circuit structure chart of functional block diagram correspondence of the present invention, see also shown in Figure 10 B, it is with unbalance abnormality and overvoltage abnormality and transships abnormality in conjunction with together, in fact top three structures are not have interference, also above-mentioned one or two abnormality processing part can be adopted separately in other words, only be described here with whole setting of three kinds of abnormalities; Wherein, described power subsystem comprises:
One is arranged on the rectification circuit D1-D4 between phase line L and the zero line N, the minus earth of described rectification circuit D1-D4, the positive pole output of described rectification circuit D1-D4;
An one electric capacity 1C1 and a voltage-stabiliser tube 1DW parallel connection, the one parallel connected end is connected its another parallel connected end ground connection with the positive pole output of described rectification circuit D1-D4; Described power line sampling unit is: be arranged on the current transformer TA1 on the phase line, and a wherein said end ground connection that is arranged on the current transformer TA1 on the phase line L, the other end is an output; One first sampling subelement, it is that the resistance 1R2 and the electric capacity 1C2 of a series connection forms, described resistance 1R2 is connected described electric capacity 1C2 one end ground connection with current transformer TA1 output on being arranged on described phase line L;
One first compares subelement, it is one first comparator 1IC2, the normal phase input end of the described first comparator 1IC2 is connected with the serial connection point of described resistance 1R2 and electric capacity 1C2, the inverting input of described first comparator is connected with described power subsystem output by a slide rheostat R4, obtains a voltage; Described voltage is unusual for overload; Owing to adopted slide rheostat 1R4, therefore described can the adjustment according to the actual needs;
For the overvoltage abnormity processing in the electricity exception, the state processing unit described in this Figure 10 B also comprises:
One second sampling subelement comprises: the sample resistance of a series connection is to 1R7,1R8, and the one end is connected other end ground connection with the positive pole output of described rectification circuit D1-D4;
One subelement comprises: the resistance of a series connection is to 1R5,1R6, and the one end is connected other end ground connection with described power subsystem output;
One second compares subelement, it is one second comparator 1IC3, the inverting input of the described second comparator 1IC3 is connected with the serial connection point of the resistance of described series connection to 1R5,1R6, and the normal phase input end of the described second comparator 1IC3 is connected with the serial connection point of the sample resistance of described series connection to 1R7,1R8; Owing to adopted slide rheostat 1R6, so overvoltage can be adjusted according to the actual needs unusually;
Also comprise a filter circuit, be arranged between the positive pole output of described first sampling subelement and described rectification circuit D1-D4 that it is that a resistance 1R9 and an electric capacity 1C3 are in series;
For the unbalance abnormity processing in the electricity exception, the power line sampling unit described in this Figure 10 B also comprises: one is arranged on the current transformer TA2 on the zero line N; Described for this reason state processing unit also includes accordingly:
One the 3rd compares subelement, it is one the 3rd comparator 1IC1, the normal phase input end of described the 3rd comparator 1IC1 is connected with current transformer TA2 output on being arranged on described phase line L, and the inverting input of described the 3rd comparator IC1 is connected with current transformer TA2 output on being arranged on described zero line N; Described action execution unit comprises: a unusual indication subelement and/or an open circuit protection subelement, wherein, described unusual indication subelement is at least one light-emitting diode, if that is to say it only is to transship abnormity processing according to concrete needs, a LED 2 then is set is connected the other end ground connection of described LED 2 with the output of the described first comparator 1IC2; If the corresponding certainly unbalance abnormality processing and the function of overvoltage abnormality processing also will be provided with, then also need two LEDs 3, LED1, output with the described second comparator 1IC3, the 3rd comparator 1IC1 is connected respectively, the other end ground connection of in like manner described LED 3, LED1; For described open circuit protection subelement, it comprises: a controllable silicon SCR and a tripping coil TQ, the control end of wherein said controllable silicon SCR is connected with the output of the described first comparator 1IC2, when taking place in order to be implemented in described overload unusual condition, circuit breaker is opened circuit; The output of the described second comparator 1IC3, the 3rd comparator 1IC1 is connected with the control end of described controllable silicon SCR, described controllable silicon SCR plus earth of while, its negative pole links to each other with the input of described tripping coil TQ.
Can produce protection for it to electricity exception situation (overload, overvoltage, unbalance), be when the unusual generation of overload, the described current transformer TA1 that is arranged on the phase line L obtains high voltage, make the output output high potential of the first comparator IC2, then indicator light LED2 is bright, described controllable silicon SCR conducting simultaneously, thus make tripping coil TQ produce the action of threading off;
When the overvoltage unusual condition takes place, the resistance that is connected with the inverting input of the described second comparator 1IC3 is to the magnitude of voltage of the serial connection point acquisition of 1R5,1R6, be lower than the magnitude of voltage that the sample resistance that is connected with the normal phase input end of the described second comparator 1IC3 obtains the serial connection point of 1R7,1R8, make the output output high potential of the second comparator 1IC3, then indicator light LED3 is bright, described controllable silicon SCR conducting simultaneously, thus make tripping coil TQ produce the action of threading off;
When unbalance unusual condition takes place, the inconsistent of sampling voltage takes place in the described current transformer TA2 that is arranged at the current transformer TA1 on the phase line L and is arranged on the zero line N, make the output output high potential of the 3rd comparator 1IC1, then indicator light LED1 is bright, described controllable silicon SCR conducting simultaneously, thus make tripping coil TQ produce the action of threading off; Finally being achieved has all had protection to the electricity exception situation on the circuit of circuit breaker place.
The above only is preferred embodiment of the present invention, only is illustrative for the purpose of the present invention, and nonrestrictive.Those skilled in the art is understood, and can carry out many changes to it in the spirit and scope that claim of the present invention limited, revise, even equivalence, but all will fall within the scope of protection of the present invention.

Claims (14)

1. the shunt release that can be subjected to the exterior power-off protection signal controlling is arranged on the power line, and it comprises a shell, and the tripping coil and the ON-OFF control circuit that are positioned at described shell, it is characterized in that described ON-OFF control circuit comprises:
One outside power-off signal receiving element in order to receiving outside outage control signal, and is converted to a semaphore;
One power subsystem obtains real-time voltage from described power line and is converted to a stable voltage, is described control circuit power supply;
One command process unit receives described semaphore, thereby produces a triggering signal, described shunt release is produced disconnect action.
2. the shunt release that is subjected to the exterior power-off protection signal controlling according to claim 1 is characterized in that: described power subsystem comprises: a rectification circuit, and it links together by described tripping coil and described phase line and zero line;
3. the shunt release that is subjected to the exterior power-off protection signal controlling according to claim 2 is characterized in that: the minus earth of described rectification circuit, the positive pole output of described rectification circuit; Also comprise:
One electric capacity and a voltage-stabiliser tube parallel connection, the one parallel connected end is connected its another parallel connected end ground connection with the positive pole output of described rectification circuit.
4. according to claim 2 or the 3 described shunt releases that are subjected to the exterior power-off protection signal controlling; it is characterized in that: described outside power-off signal receiving element is one first photoelectrical coupler; its input is received the break signal of being sent by external control devices, thereby produces described semaphore at the output of described first photoelectrical coupler.
5. the shunt release that is subjected to the exterior power-off protection signal controlling according to claim 4, it is characterized in that: described command process unit comprises: a controllable silicon, it is arranged between the described rectification circuit both positive and negative polarity, and described silicon controlled control end is connected with the output of described first photoelectrical coupler; Described controllable silicon plus earth.
6. the shunt release that is subjected to the exterior power-off protection signal controlling according to claim 2; it is characterized in that: described exterior power-off protection signal receiving unit and command process unit are served as by a relay; one end and the described zero line of described relay moving contact join, and the other end of described relay moving contact and the input of described tripping coil join.
7. according to claim 2 or the 6 described shunt releases that are subjected to the exterior power-off protection signal controlling, it is characterized in that: also comprise: a positive temperature coefficient resistor is arranged between described tripping coil input and the described rectification circuit.
8. the shunt release that is subjected to the exterior power-off protection signal controlling according to claim 4; it is characterized in that: also comprise: a switch working state detecting unit; whether produce action in order to detect described release; it comprises: one second photoelectrical coupler; its receiving terminal is connected with described rectification circuit both positive and negative polarity, and the output of described second photoelectrical coupler is connected with long-range accepting device.
9. according to claim 2 or the 3 described shunt releases that are subjected to the exterior power-off protection signal controlling, it is characterized in that: also comprise: a state processing unit, it comprises:
One power line sampling subelement, it is in order to characterize the semaphore of power state from the set power line collection of described shunt release;
One judges the abnormality subelement, and it receives the semaphore of above-mentioned sign power state, output one control signal under abnormality.
10. the shunt release that is subjected to the exterior power-off protection signal controlling according to claim 9; it is characterized in that: described power line sampling subelement is a current transformer that is arranged on the phase line; described judgement abnormality subelement is that current overload is handled unusually, and it comprises:
One first sample circuit, it is that the resistance and the electric capacity of a series connection is formed, described resistance is connected described electric capacity one end ground connection with current transformer output on being arranged on described phase line;
One first comparison circuit, it is one first comparator, the normal phase input end of described first comparator is connected with the serial connection point of described resistance and electric capacity, the inverting input of described first comparator is connected with described power subsystem output by a slide rheostat, obtain a voltage, its output is connected with described silicon controlled control end.
11. the shunt release that is subjected to the exterior power-off protection signal controlling according to claim 9 is characterized in that: described judgement abnormality subelement is that overvoltage is handled unusually to electric current, and it comprises:
One second sample circuit, it comprises: the sample resistance of a series connection is right, and the one end is connected other end ground connection with the positive pole output of described rectification circuit;
One circuit, it comprises: the resistance of a series connection is right, and the one end is connected other end ground connection with described power subsystem output;
One second comparison circuit, it is one second comparator, the right serial connection point of the inverting input of described second comparator and the resistance of described series connection is connected, the right serial connection point of the normal phase input end of described second comparator and the sample resistance of described series connection is connected, and its output is connected with described silicon controlled control end.
12. the shunt release that is subjected to the exterior power-off protection signal controlling according to claim 9; it is characterized in that: described power line sampling subelement is to be arranged on the current transformer on the phase line and to be arranged on a current transformer on the zero line; described judgement abnormality subelement is that current unbalance is handled unusually, and it comprises:
One the 3rd compares subelement, it is one the 3rd comparator, the normal phase input end of described the 3rd comparator is connected with current transformer output on being arranged on described phase line, the inverting input of described the 3rd comparator is connected with current transformer output on being arranged on described zero line, and its output is connected with described silicon controlled control end.
13. the shunt release that is subjected to the exterior power-off protection signal controlling according to claim 9; it is characterized in that: described power line sampling subelement is a current transformer that is arranged on the phase line; described judgement abnormality subelement is that current unbalance is handled unusually, and it comprises:
One the 3rd sample circuit, it is that a parallel resistor and electric capacity are formed, its parallel connected end is connected with current transformer output on being arranged on phase line, obtains the first sampled signal amount;
One the 3rd comparison circuit, it is one first integrated circuit, the input port of the described first integrated circuit appointment obtains the described first sampled signal amount, its signal with described first integrated circuit of input compares acquisition, when confirming that imbalance state takes place, export a unbalance control signal, give described silicon controlled control end.
14. according to the described shunt release that is subjected to the exterior power-off protection signal controlling of claim 10-14; it is characterized in that: also comprise: a unusual indication subelement comprises at least one light-emitting diode; it is connected with the output of described comparator, the other end ground connection of described light-emitting diode.
CNA200810083340XA 2007-08-21 2008-03-03 Shunt release capable of being controlled by exterior power-off protection signal Pending CN101373690A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA200810083340XA CN101373690A (en) 2007-08-21 2008-03-03 Shunt release capable of being controlled by exterior power-off protection signal

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CNA2007101451060A CN101101836A (en) 2007-08-21 2007-08-21 Shunt opening release capable of being controlled by external electricity-breaking protection signal
CN200710145106.0 2007-08-21
CNA200810083340XA CN101373690A (en) 2007-08-21 2008-03-03 Shunt release capable of being controlled by exterior power-off protection signal

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Publication Number Publication Date
CN101373690A true CN101373690A (en) 2009-02-25

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CNA2007101451060A Pending CN101101836A (en) 2007-08-21 2007-08-21 Shunt opening release capable of being controlled by external electricity-breaking protection signal
CNA200810083340XA Pending CN101373690A (en) 2007-08-21 2008-03-03 Shunt release capable of being controlled by exterior power-off protection signal

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CN102294532A (en) * 2011-06-14 2011-12-28 北京宏孚瑞达科技有限公司 Voltage reducing electric-shock protection device of arc welding power source and arc welding power supply device
CN103177131B (en) * 2011-12-21 2017-03-29 北京普源精电科技有限公司 Data acquisition unit with automatic cut-off protection protective function and data collecting card
CN111525493A (en) * 2020-04-07 2020-08-11 温州大学 Thing networking intelligent circuit breaker based on WIFI mode

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