CN100477055C - Selective protection switch - Google Patents
Selective protection switch Download PDFInfo
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- CN100477055C CN100477055C CNB2005100297589A CN200510029758A CN100477055C CN 100477055 C CN100477055 C CN 100477055C CN B2005100297589 A CNB2005100297589 A CN B2005100297589A CN 200510029758 A CN200510029758 A CN 200510029758A CN 100477055 C CN100477055 C CN 100477055C
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Abstract
The invention proclaims a selective switch, comprising a releasing device, an operating mechanism, a first contact, an electromagnetic mechanism and a second contact, where the operating mechanism controls the two contacts according to releasing signal of the releasing device, and the electromagnetic mechanism controls the second contact. The selective switch makes up for the insufficiency that the micro breaker in terminal power distribution network is short of selective protecting functions and provides a way of being able to solve the skip tripping problem between higher-level and lower-level switches to a certain extent.
Description
Technical field
The present invention relates to Protector for electric appliances, more particularly, relate to the selective protection switch that in the terminal distribution network, uses.
Background technology
At present; development along with architectural electricity and building automation; the application of miniature circuit breaker in the house power distribution system more and more widely; but, this type of switch (has only moving two segment protect characteristics of overload long delay and short circuit wink because mostly lacking the selective protection function; and do not have a short circuit short time delay protective feature) thus cause the phenomenon of overstep tripping in the house power distribution system commonplace, this has just greatly influenced the stability and the reliability of electric power system.Though front connected fuse can provide necessary short circuit backup protection, can not give the terminal power consumption equipment and protect with necessary selective, realizes this type of function so needed corresponding product badly, makes the terminal distribution system more reliable and more stable.
So just need a kind of selective switch that overcomes above-mentioned defective.
Summary of the invention
The purpose of this invention is to provide a kind of selective protection switch that in the terminal distribution network, uses, and its selective protection function can be realized by multiple mode.
According to an aspect of the present invention; a kind of selective protection switch is provided; be connected between first binding post and second binding post; comprise: trip gear, single operating mechanism, first contact, electromagnetic mechanism and second contact; wherein said single operating mechanism is controlled first contact and second contact according to the trip signal of described trip gear; described electromagnetic mechanism is controlled described second contact, and wherein first contact and second contact are in series.
According to one embodiment of the invention, described trip gear comprises first overcurrent trip and second overcurrent trip, described second overcurrent trip current-limiting resistance of connecting, one end of this second overcurrent trip and an end of current-limiting resistance are connected, the other end of current-limiting resistance is connected between first contact and second contact, the other end of this second overcurrent trip is connected in second binding post, described electromagnetic mechanism described first overcurrent trip of connecting, one end of described electromagnetic mechanism is connected with an end of first overcurrent trip, the other end of this electromagnetic mechanism connects one first contact, and the other end of this first overcurrent trip connects first binding post; When protected circuit is in normal operating conditions, first contact and second contact are closed, and because the existence of current-limiting resistance, the current path of this switch inside flows through first overcurrent trip, electromagnetic mechanism, first contact, second contact successively and flows out; When overload took place circuit, first overcurrent trip acted on the single operating mechanism, made win contact and the disconnection of second contact, cut off overload current; When being short-circuited current conditions, second contact is subjected to the effect of electromagnetic mechanism is scolded out at once, and current path becomes at once: first overcurrent trip, electromagnetic mechanism, first contact, current-limiting resistance, second overcurrent trip; Simultaneously, second overcurrent trip detects fault current and correspondingly makes the reaction of delayed releasing, and in this section delay time, if short trouble is eliminated, second contact is closed again so; If short trouble is not eliminated, then second overcurrent trip acts on win contact and second contact is disconnected fully.
According to one embodiment of the invention, described trip gear comprises first overcurrent trip and second overcurrent trip, wherein said first contact, one end links to each other with an end of electromagnetic mechanism, the other end of electromagnetic mechanism is also linked an end of first overcurrent trip, the other end of first overcurrent trip is linked first binding post, the other end of second contact also links to each other with second binding post, connect second overcurrent trip and together be connected in parallel on the two ends of second contact of one current-limiting resistance, single operating mechanism and first, second overcurrent trip links to each other, and act on first and second contacts, according to described first, second overcurrent trip closes it, divide operation; Electromagnetic mechanism only acts on second contact; When protected circuit is in normal operating conditions, first contact and second contact are closed, and because the existence of current-limiting resistance, the current path of this switch inside flows through first overcurrent trip, electromagnetic mechanism, first contact, second contact successively and flows out; When overload took place circuit, first overcurrent trip acted on the single operating mechanism, made win contact and the disconnection of second contact, cut off overload current; When being short-circuited current conditions, second contact is subjected to the effect of electromagnetic mechanism is scolded out at once, and current path becomes at once: first overcurrent trip, electromagnetic mechanism, first contact, current-limiting resistance, second overcurrent trip; Simultaneously, second overcurrent trip detects fault current and correspondingly makes the reaction of delayed releasing, and in this section delay time, if short trouble is eliminated, second contact is closed again so; If short trouble is not eliminated, then second overcurrent trip acts on win contact and second contact is disconnected fully.
According to one embodiment of the invention, an end of the first contact other end and second contact constitutes a pair of contact structure jointly, and perhaps first contact and second contact are the single contacts of two series connection.
According to one embodiment of the invention, described first overcurrent trip and second overcurrent trip are bimetal leaf.
According to one embodiment of the invention, described trip gear is an electronics trip gear, comprise detecting unit, electronic control unit and release, wherein series connection one detecting unit, detecting unit connection electronic control unit, electronic control unit connection release, release connect single operating mechanism in the circuit between first binding post and the electromagnetic mechanism, single operating mechanism direct control first contact and second contact carries out branch, closing operation; One end of the first binding post joint detection unit, the other end of detecting unit is linked an end of electromagnetic mechanism, the other end of electromagnetic mechanism is linked first contact, first contact and second contact are in series, and second contact is linked second terminals, and a current-limiting resistance is connected in parallel on the two ends of second contact; Electromagnetic mechanism only acts on second contact; In when, in the circuit overload current taking place when, detecting unit detects the fault current signal and is sent to electronic control unit, by the time of electronic control unit decision time-delay, trigger the release action then, drive single operating mechanism first contact and second contact are disconnected; When being short-circuited electric current in the circuit, still detect the fault current signal and be sent to electronic control unit by detecting unit, electronic control unit starts default short circuit delay procedure, in this section delay time, when if short trouble is eliminated, be subjected to the electromagnetic mechanism effect and second contact that makes it to scold out is closed again, if short trouble is not eliminated, then electronic control unit triggers release, it is acted on first contact and second contact are disconnected fully.
According to one embodiment of the invention, described detecting unit is a current transformer, passes the circuit between first terminals and electromagnetic mechanism.
According to one embodiment of the invention, described trip gear comprises first overcurrent trip and second overcurrent trip, described second overcurrent trip current-limiting resistance of connecting, one end of described second overcurrent trip and current-limiting resistance is connected between first contact and second contact, the other end is connected in second binding post, one end of described electromagnetic mechanism connects first contact, the other end connects first binding post, one end of described first overcurrent trip is connected in second contact, and the other end is connected in second terminals; Single operating mechanism links to each other with first, second overcurrent trip, and acts on first and second contacts, makes it close, divide operation according to described first, second overcurrent trip, and electromagnetic mechanism only acts on second contact; When protected circuit is in normal operating conditions, first contact and second contact are closed, and because the existence of current-limiting resistance, the current path of this switch inside flows through electromagnetic mechanism, first contact, second contact, first overcurrent trip successively and flows out; When overload took place circuit, first overcurrent trip acted on the single operating mechanism, made win contact and the disconnection of second contact, cut off overload current; When being short-circuited current conditions, second contact is subjected to the effect of electromagnetic mechanism is scolded out at once, and current path becomes at once: electromagnetic mechanism, first contact, current-limiting resistance, second overcurrent trip; Simultaneously, second overcurrent trip detects fault current and correspondingly makes the reaction of delayed releasing, and in this section delay time, if short trouble is eliminated, second contact is closed again so; If short trouble is not eliminated, then second overcurrent trip acts on win contact and second contact is disconnected fully.
According to one embodiment of the invention, described trip gear comprises first overcurrent trip and second overcurrent trip, wherein first contact, one end links to each other with electromagnetic mechanism, second contact is connected with first overcurrent trip and is linked second binding post again, connect second overcurrent trip and together be connected in parallel on the two ends of second contact and first overcurrent trip of one current-limiting resistance, single operating mechanism and first, second overcurrent trip links to each other, and act on first and second contacts, according to described first, second overcurrent trip closes it, divide operation, electromagnetic mechanism only acts on second contact; When protected circuit is in normal operating conditions, first contact and second contact are closed, and because the existence of current-limiting resistance, the current path of this switch inside flows through electromagnetic mechanism, first contact, second contact, first overcurrent trip successively and flows out; When overload took place circuit, first overcurrent trip acted on the single operating mechanism, made win contact and the disconnection of second contact, cut off overload current; When being short-circuited current conditions, second contact is subjected to the effect of electromagnetic mechanism is scolded out at once, and current path becomes at once: electromagnetic mechanism, first contact, current-limiting resistance, second overcurrent trip; Simultaneously, second overcurrent trip detects fault current and correspondingly makes the reaction of delayed releasing, and in this section delay time, if short trouble is eliminated, second contact is closed again so; If short trouble is not eliminated, then second overcurrent trip acts on win contact and second contact is disconnected fully.
According to one embodiment of the invention, an end of the first contact other end and second contact constitutes a pair of contact structure jointly, and perhaps first contact and second contact are the single contacts of two series connection.
According to one embodiment of the invention, described first overcurrent trip and second overcurrent trip are bimetal leaf.
Adopt the selective protection switch of technical scheme design of the present invention to remedy the deficiency of the miniature circuit breaker shortage selective protection function of using in the terminal distribution network, and a kind of mode that can solve overstep tripping problem between the superior and the subordinate's switch to a certain extent is provided.
Description of drawings
The above and other feature of the present invention, character and advantage will further describe below in conjunction with the accompanying drawings and embodiments, and identical in the accompanying drawings Reference numeral is represented identical feature all the time, wherein,
Fig. 1 is the basic principle block diagram according to selective protection switch of the present invention;
Fig. 2 is the structural principle schematic diagram according to first embodiment of first implementation of the present invention;
Fig. 3 is the structural principle schematic diagram according to second embodiment of first implementation of the present invention;
Fig. 4 is the structural principle schematic diagram according to the 3rd embodiment of first implementation of the present invention;
Fig. 5 is the structural principle schematic diagram according to the 4th embodiment of second implementation of the present invention;
Fig. 6 is the structural principle schematic diagram according to the 5th embodiment of second implementation of the present invention;
Fig. 7 is the structural principle schematic diagram according to the 6th embodiment of second implementation of the present invention;
Fig. 8 is the structural principle schematic diagram according to the 7th embodiment of the 3rd implementation of the present invention;
Fig. 9 is the structural principle schematic diagram according to the 8th embodiment of the 3rd implementation of the present invention;
Figure 10 is the structural principle schematic diagram according to the 9th embodiment of the 3rd implementation of the present invention;
Figure 11 is the structural principle schematic diagram according to the tenth embodiment of the 3rd implementation of the present invention.
Embodiment
Further specify technical scheme of the present invention below in conjunction with drawings and Examples.
With reference to figure 1, according to the invention provides a kind of selective switch, be connected between first binding post 110 and second binding post 112, first binding post 110 and second binding post 112 both one of them are the ends of incoming cables, one is leading-out terminal, described selective switch comprises: trip gear 100, single operating mechanism 102, first contact 104, the electromagnetic mechanism 106 and second contact 108, wherein single operating mechanism 102 is controlled first contact 104 and second contact 108 according to the trip signal of trip gear 100, electromagnetic mechanism 106 control second contact, 108, the first contacts 104 and second contact 108 are in series.
Selective switch of the present invention can use multiple mode to realize, describes below in conjunction with accompanying drawing:
Implementation one
This kind implementation comprises Fig. 2-embodiment shown in Figure 4, wherein trip gear 100 comprises first overcurrent trip 200 and second overcurrent trip 202, second overcurrent trip, 202 series connection, one current-limiting resistance 300, one end of second overcurrent trip 202 and current-limiting resistance 300 is connected between first contact 104 and second contact 108, the other end is connected in second binding post 112, electromagnetic mechanism 106 series connection first overcurrent trip 200, one end of the electromagnetic mechanism 106 and first overcurrent trip 200 is connected first contact 104, and the other end connects first binding post 110; When protected circuit is in normal operating conditions, first contact 104 and second contact 108 are closed, and because the existence of current-limiting resistance 300, the current path of this switch inside flows through first overcurrent trip 200, electromagnetic mechanism 106, first contact 104, second contact 108 successively and flows out; When overload took place circuit, first overcurrent trip 200 acted on the single operating mechanism 102, made win contact 104 and 108 disconnections of second contact, cut off overload current; When being short-circuited current conditions, second contact 108 is subjected to the effect of electromagnetic mechanism 106 is scolded out at once, and current path becomes at once: first overcurrent trip 200, electromagnetic mechanism 106, first contact 104, current-limiting resistance 300, second overcurrent trip 202; Simultaneously, second overcurrent trip 202 detects fault current and correspondingly makes the reaction of delayed releasing, and in this section delay time, if short trouble is eliminated, second contact 108 is closed again so; If short trouble is not eliminated, then second overcurrent trip 202 acts on win contact 104 and second contact 108 is disconnected fully.
On structure, the principal character of this kind implementation is: adopt mechanical trip gear, and first release and second release be distributed in the not homonymy of two contacts, electromagnetic mechanism is positioned at first release, one side.
First embodiment
With reference to figure 2, according to the first embodiment of the present invention, trip gear 100 comprises first overcurrent trip 200 and second overcurrent trip 202, wherein first contact, 104 1 ends link to each other with electromagnetic mechanism 106, electromagnetic mechanism 106 is also linked an end of first overcurrent trip 200, the other end of first overcurrent trip 200 is linked first binding post 110, one end of first contact, 104 other ends and second contact 108 constitutes a pair of contact structure jointly, second contact 108 also links to each other with second binding post 112, one current-limiting resistance, 300 series connection, second overcurrent trip 202 also together is connected in parallel on the two ends of second contact 108, single operating mechanism 102 and first, second overcurrent trip 200,202 link to each other, and act on first and second contacts 104, on 108 according to first, second overcurrent trip 200,202 close it, divide operation; 106 of electromagnetic mechanisms act on second contact 108, when protected circuit is in normal operating conditions, first contact 104 and second contact 108 are closed, and because the existence of current-limiting resistance, the current path of this switch inside flows through first overcurrent trip 200, electromagnetic mechanism 106, first contact 104, second contact 108 from first binding post 110 successively and flows out second binding post 112 again; When overload takes place in circuit, first overcurrent trip 200 acts on the single operating mechanism 102, make win contact 104 and 108 disconnections of second contact, cut off overload current, it is characterized in that, when being short-circuited current conditions, second contact 108 is subjected to the effect of electromagnetic mechanism 106 is scolded out at once, and current path becomes at once: first overcurrent trip 200, electromagnetic mechanism 106, first contact 104, current-limiting resistance 300, second overcurrent trip 202; Simultaneously, second overcurrent trip 202 detects fault current and correspondingly makes the reaction of delayed releasing, and in this section delay time, if short trouble is eliminated, second contact 108 is closed again so; If short trouble is not eliminated, then second overcurrent trip 202 acts on win contact 104 and second contact 108 is disconnected fully, and having only at this moment that armrest is moving could closed again first contact 104 and second contact 108.From this embodiment can see involved in the present invention to selective switch can remedy miniature circuit breaker in the shortcoming aspect the selectivity function.According to the first embodiment of the present invention, first overcurrent trip 200 and second overcurrent trip 202 adopt bimetal leaf.
Second embodiment
With reference to figure 3, it shows second embodiment of the present invention, it is with the difference of embodiment shown in Figure 2: first contact 104 and second contact 108 are two single contacts of connecting, rather than form the double-contact structure like that among first embodiment shown in the image pattern 2.Simultaneously, second overcurrent trip 202 and the current-limiting resistance 300 of series connection have exchanged the position mutually.
The 3rd embodiment
With reference to figure 4, it shows the 3rd embodiment of the present invention, and it is with the difference of embodiment shown in Figure 2: first overcurrent trip 200 and the electromagnetic mechanism 106 of connecting exchanged the position mutually.
Sum up, adopts first kind of implementation, the device of series connection can transposition mutually on the same current branch, and the while, two contacts also can adopt different connected modes.This all is within protection scope of the present invention.Simultaneously, need explanation, first contact 104 described herein and second contact 108, first overcurrent trip 200 and second overcurrent trip 202, and first binding post 110 and second binding post 112 all be notion of equal value, that is, first binding post 110 can be that the end of incoming cables also can be a leading-out terminal, correspondingly, second binding post 112 can be leading-out terminal or end of incoming cables.
Implementation two
This kind implementation comprises Fig. 5-embodiment shown in Figure 7, wherein trip gear 100 is an electronics trip gear 400, comprise detecting unit 402, electronic control unit 404 and release 406, wherein series connection one detecting unit 402, detecting unit 402 connection electronic control units 404, electronic control unit 404 connection releases 406, release 406 connect single operating mechanism 102 in the circuit between first binding post 110 and the electromagnetic mechanism 106, single operating mechanism 102 direct control first contacts 104 and second contact 108 carries out branch, closing operation; The electric connecting mode of switch inside is that first binding post 110 is linked electromagnetic mechanism 106, electromagnetic mechanism 106 links first contact 104 and second contact 108, second contact 108 are linked the two ends that second binding post, 112, one current-limiting resistances 300 are connected in parallel on second contact 108.106 of electromagnetic mechanisms act on second contact 108; In when, in the circuit overload current taking place when, detecting unit 402 detects the fault current signal and is sent to electronic control unit 404, by the time of electronic control unit 404 decision time-delays, trigger release 406 actions then, drive single operating mechanism 102 first contact 104 and second contact 108 are disconnected; When being short-circuited electric current in the circuit, still detect the fault current signal and be sent to electronic control unit 404 by detecting unit 402, electronic control unit 404 starts default short circuit delay procedure, in this section delay time, when if short trouble is eliminated, second contact 108 that is subjected to electromagnetic mechanism 106 effects and makes it to scold out is closed again, if short trouble is not eliminated, then electronic control unit 404 triggers release 406, it is acted on first contact 104 and second contact 108 are disconnected fully.
This kind implementation characteristics structurally are: adopt electronic installation to substitute mechanical current-release device.Detecting unit 402 in the electronic installation can be a current transformer, if current transformer then passes the circuit between first binding post 110 and electromagnetic mechanism 106.
The 4th embodiment
With reference to figure 5, it shows the fourth embodiment of the present invention, a fourth embodiment in accordance with the invention, first overcurrent trip 200 can reach by the principle that single operating mechanism 102 disconnects first contact 104 and second contact 108 under the current overload situation and descend the operating principle available electron mode of second overcurrent trip 202 to finish in the short circuit current situation, wherein said trip gear 100 is an electronics trip gear 400, comprise detecting unit 402, electronic control unit 404 and release 406 are connected into detecting unit 402 with first binding post 110, detecting unit 402 is connected into electronic control unit 404, electronic control unit 404 is connected into release 406, release 406 is connected into single operating mechanism 102, single operating mechanism 102 is directly controlled first contact 104 and second contact 108 and is divided, closing operation; Detecting unit 402 is also linked electromagnetic mechanism 106, electromagnetic mechanism 106 links first contact 104 and second contact 108, second contact 108 are linked second binding post 112, one end of first contact, 104 other ends and second contact 108 constitutes a pair of contact structure jointly, second contact 108 also links to each other with second binding post 112, one current-limiting resistance 300 is connected in parallel on the two ends of second contact 108, and 106 of electromagnetic mechanisms act on second contact 108.The operation principle of this embodiment is as follows, in when, in the circuit overload current taking place when, detecting unit 402 detects the fault current signal and is sent to electronic control unit 404, by the time of electronic control unit 404 decision time-delays, trigger release 406 actions then, drive single operating mechanism 102 first contact 104 and second contact 108 are disconnected; When being short-circuited electric current in the circuit, detect the fault current signal by detecting unit 402 and be sent to electronic control unit 404, electronic control unit 404 starts default short circuit delay procedure at once, in this section delay time, when if short trouble is eliminated, second contact 108 that is subjected to electromagnetic mechanism 106 effects and makes it to scold out is closed again, if short trouble is not eliminated, then electronic control unit 404 triggers release 406, make it act on single operating mechanism 102 immediately first contact 104 and second contact 108 are disconnected fully, this moment can only the moving ability of armrest Closing Switch.Can see that from this embodiment the present invention can expand its defencive function by the part components and parts that change wherein.
The 5th embodiment
With reference to figure 6, it shows the fifth embodiment of the present invention, the difference of itself and the 4th embodiment shown in Figure 5 is that first contact 104 and second contact 108 form the double-contact structures, rather than are the single contact of two series connection like that among the 4th embodiment shown in the image pattern 5.Simultaneously, electronic installation 400 and electromagnetic mechanism 106 are positioned at second binding post, 112 1 sides, rather than are positioned at first binding post, 110 1 sides as the 4th embodiment.
The 6th embodiment
With reference to figure 7, it shows the sixth embodiment of the present invention, the difference of itself and the 5th embodiment shown in Figure 6 is that first contact 104 and second contact 108 are single contacts of two series connection, rather than form the double-contact structure like that among the 5th embodiment shown in the image pattern 6.
Sum up, adopt second kind of implementation, two contacts also can adopt different connected modes.This all is within protection scope of the present invention.Simultaneously, need explanation, first contact 104 described herein and second contact 108, and first binding post 110 and second binding post 112 all be notion of equal value, promptly, first binding post 110 can be that the end of incoming cables also can be a leading-out terminal, and correspondingly, second binding post 112 can be leading-out terminal or end of incoming cables.
Implementation three
The embodiment that adopts this kind implementation is shown in Fig. 8-11, wherein trip gear 100 comprises first overcurrent trip 500 and second overcurrent trip 502, second overcurrent trip, 502 series connection, one current-limiting resistance 300, one end of second overcurrent trip 502 and current-limiting resistance 300 is connected between first contact 104 and second contact 108, the other end is connected in second binding post 112, one end of electromagnetic mechanism 106 series connection connects first contact 104, the other end connects first binding post 110, one end of first overcurrent trip 500 is connected in second contact 108, and the other end is connected in second binding post 112; Single operating mechanism 102 links to each other with first, second overcurrent trip 500,502, and act on first and second contacts 104,108, make it close, divide operation according to first, second overcurrent trip 500,502,106 of electromagnetic mechanisms act on second contact 108; When protected circuit is in normal operating conditions, first contact 104 and second contact 108 are closed, and because the existence of current-limiting resistance, the current path of this switch inside flows through electromagnetic mechanism 106, first contact 104, second contact 108, first overcurrent trip 500 successively and flows out; When overload took place circuit, first overcurrent trip 500 acted on the single operating mechanism 106, made win contact 104 and 108 disconnections of second contact, cut off overload current; When being short-circuited current conditions, second contact 108 is subjected to the effect of electromagnetic mechanism 106 is scolded out at once, and current path becomes at once: electromagnetic mechanism, first contact 104, current-limiting resistance, second overcurrent trip 502; Simultaneously, second overcurrent trip 502 detects fault current and correspondingly makes the reaction of delayed releasing, and in this section delay time, if short trouble is eliminated, second contact 108 is closed again so; If short trouble is not eliminated, then second overcurrent trip 502 acts on win contact 104 and second contact 108 is disconnected fully.
On structure, the principal character of this kind implementation is: adopt mechanical trip gear, and first release and second release be distributed in the same side of two contacts, electromagnetic mechanism is positioned at opposite side.
The 7th embodiment
With reference to figure 8, it shows the seventh embodiment of the present invention, and according to a seventh embodiment of the invention, first overcurrent trip 500 and second contact 108 be cascaded can guarantee that two overcurrent trips only work under each autocorrelative operating mode; Trip gear 100 comprises first overcurrent trip 500 and second overcurrent trip 502, wherein first contact, 104 1 ends link to each other with electromagnetic mechanism 106, one end of the other end and second contact 108 constitutes a pair of contact structure jointly, second contact 108 is connected with first overcurrent trip 500 and is linked leading-out terminal again, one current-limiting resistance, 300 series connection, second overcurrent trip 502 also together is connected in parallel on the two ends of second contact 108 and first overcurrent trip 500, single operating mechanism 102 and first, second overcurrent trip 500,502 link to each other, and act on first and second contacts 104, on 108 according to described first, second overcurrent trip 500,502 close it, divide operation, 106 of electromagnetic mechanisms act on second contact 108; When protected circuit is in normal operating conditions, first contact 104 and second contact 108 are closed, and because the existence of current-limiting resistance, the current path of this switch inside flows through electromagnetic mechanism 106, first contact 104, second contact 108, first overcurrent trip 500 from first binding post 110 successively and flows out second binding post 112 again; When overload takes place in circuit, first overcurrent trip 500 acts on the single operating mechanism, make win contact 104 and 108 disconnections of second contact, cut off overload current, when being short-circuited current conditions, second contact 108 is subjected to the effect of electromagnetic mechanism 106 is scolded out at once, and current path becomes at once: electromagnetic mechanism 106, first contact 104, current-limiting resistance 300, second overcurrent trip 502; Simultaneously, second overcurrent trip 502 detects fault current and correspondingly makes the reaction of delayed releasing, and in this section delay time, if short trouble is eliminated, second contact 108 is closed again so; If short trouble is not eliminated, then second overcurrent trip 502 acts on and makes win contact 104 and the disconnection of second contact, 108 switches on the single operating mechanism, and at this moment having only armrest to move could closed again first contact 104 and second contact 108.According to a seventh embodiment of the invention, first overcurrent trip 500 and second overcurrent trip 502 adopt bimetal leaf.
The 8th embodiment
With reference to figure 9, it shows the eighth embodiment of the present invention, and its difference with the 7th embodiment is: first contact 104 and second contact 108 are two single contacts of connecting, rather than form the double-contact structure like that among the 7th embodiment shown in the image pattern 8.Simultaneously, second overcurrent trip 502 and the current-limiting resistance 300 of series connection have exchanged the position mutually.
The 9th embodiment
With reference to Figure 10, it shows the ninth embodiment of the present invention, and the difference of itself and the 7th embodiment is: first contact 104 and second contact 108 constitute the double-contact of another kind of form; Simultaneously, electromagnetic mechanism 106 and trip gear 100 have exchanged the position.
The tenth embodiment
With reference to Figure 11, it shows the tenth embodiment of the present invention, the difference of itself and the 9th embodiment is, changed the node location of the branch road that forms by the current-limiting resistance 300 and second overcurrent trip 502, in this embodiment, this node at first is connected to first overcurrent trip 500, is connected to binding post afterwards, rather than picture is connected the outside of first overcurrent trip 500 in other embodiments.
Sum up, adopts first kind of implementation, the device of series connection can transposition mutually on the same current branch, and the while, two contacts also can adopt different connected modes.This all is within protection scope of the present invention.Simultaneously, need explanation, first contact 104 described herein and second contact 108, first overcurrent trip 500 and second overcurrent trip 502, and first binding post 110 and second binding post 112 all be notion of equal value, that is, first binding post 110 can be that the end of incoming cables also can be a leading-out terminal, correspondingly, second binding post 112 can be leading-out terminal or end of incoming cables.
Need explanation; though show ten different embodiment of three kinds of implementations of the present invention above; but scope of the present invention is not limited to above-mentioned several specifically described embodiment; wherein each parts trip gear 100; single operating mechanism 102; first contact 104; electromagnetic mechanism 106; second contact 108; comprise first overcurrent trip 200 in the trip gear; 500 and second overcurrent trip 202; 502; and the concrete putting position of electronics trip gear 400 is not limited to three above-mentioned specific embodiments; their putting position is variable, as long as its principle meets structure chart shown in Figure 1 and promptly should be considered to be within protection scope of the present invention.
Adopt the selective protection switch of technical scheme design of the present invention to remedy the deficiency of the miniature circuit breaker shortage selective protection function of using in the terminal distribution network, and a kind of mode that can solve overstep tripping problem between the superior and the subordinate's switch to a certain extent is provided.
Though technical scheme of the present invention is illustrated in conjunction with preferred embodiment; but it should be appreciated by those skilled in the art; various modifications or change for the above embodiments are predictable; this should not be regarded as having exceeded protection scope of the present invention; therefore; protection scope of the present invention is not limited to above-mentioned specifically described embodiment, and should be the most wide in range scope that meets the inventive features that discloses in this place.
Claims (10)
1. selective protection switch; be connected between first binding post (110) and second binding post (112); it is characterized in that; comprise: trip gear (100); single operating mechanism (102); first contact (104); electromagnetic mechanism (106) and second contact (108); wherein said single operating mechanism (102) is controlled first contact (104) and second contact (108) according to the trip signal of described trip gear (100); described electromagnetic mechanism (106) control described second contact (108), described first contact (104) and second contact (108) are in series.
2. selective protection switch as claimed in claim 1, it is characterized in that, described trip gear (100) comprises first overcurrent trip (200) and second overcurrent trip (202), described second overcurrent trip (202) series connection one current-limiting resistance (300), one end of this second overcurrent trip (202) is connected with an end of current-limiting resistance (300), the other end of current-limiting resistance (300) is connected between first contact (104) and second contact (108), the other end of this second overcurrent trip (202) is connected in one second binding post (112), described electromagnetic mechanism (106) series connection described first overcurrent trip (200), one end of described electromagnetic mechanism (106) is connected with an end of first overcurrent trip (200), the other end of this electromagnetic mechanism (106) connects first contact (104), and the other end of this first overcurrent trip (200) connects first binding post (110);
When protected circuit is in normal operating conditions, first contact (104) and second contact (108) are closed, and because the existence of current-limiting resistance (300), the current path of this switch inside flows through first overcurrent trip (200), electromagnetic mechanism (106), first contact (104), second contact (108) successively and flows out; When overload took place circuit, first overcurrent trip (200) acted on the single operating mechanism (102), and contact of winning (104) and second contact (108) are disconnected, and cut off overload current; When being short-circuited current conditions, second contact (108) is subjected to the effect of electromagnetic mechanism (106) is scolded out at once, and current path becomes at once: first overcurrent trip (200), electromagnetic mechanism (106), first contact (104), current-limiting resistance (300), second overcurrent trip (202); Simultaneously, second overcurrent trip (202) detects fault current and correspondingly makes the reaction of delayed releasing, and in this section delay time, if short trouble is eliminated, second contact (108) is closed again so; If short trouble is not eliminated, then second overcurrent trip (202) acts on contact of winning (104) and second contact (108) is disconnected fully.
3. selective protection switch as claimed in claim 2, it is characterized in that, described trip gear (100) comprises first overcurrent trip (200) and second overcurrent trip (202), wherein said first contact (104) one ends link to each other with an end of electromagnetic mechanism (106), the other end of electromagnetic mechanism (106) is also linked an end of first overcurrent trip (200), the other end of first overcurrent trip (200) is linked first binding post (110), the other end of second contact (108) also links to each other with second binding post (112), one current-limiting resistance (300) series connection second overcurrent trip (202) also together is connected in parallel on the two ends of second contact (108), single operating mechanism (102) and first, second overcurrent trip (200), (202) link to each other, and act on first contact (104) and second contact (108), according to described first overcurrent trip (200), second overcurrent trip (202) closes it, divide operation; Electromagnetic mechanism (106) only acts on second contact (108);
When protected circuit is in normal operating conditions, first contact (104) and second contact (108) are closed, and because the existence of current-limiting resistance (300), the current path of this switch inside flows through first overcurrent trip (200), electromagnetic mechanism (106), first contact (104), second contact (108) successively and flows out; When overload took place circuit, first overcurrent trip (200) acted on the single operating mechanism (102), and contact of winning (104) and second contact (108) are disconnected, and cut off overload current; When being short-circuited current conditions, second contact (108) is subjected to the effect of electromagnetic mechanism (106) is scolded out at once, and current path becomes at once: first overcurrent trip (200), electromagnetic mechanism (106), first contact (104), current-limiting resistance (300), second overcurrent trip (202); Simultaneously, second overcurrent trip (202) detects fault current and correspondingly makes the reaction of delayed releasing, and in this section delay time, if short trouble is eliminated, second contact (108) is closed again so; If short trouble is not eliminated, then second overcurrent trip (202) acts on contact of winning (104) and second contact (108) is disconnected fully.
4. as claim 2 or 3 described selective protection switch, it is characterized in that described first overcurrent trip (200) and second overcurrent trip (202) are bimetal leaf.
5. selective protection switch as claimed in claim 1, it is characterized in that, described trip gear (100) is an electronics trip gear (400), comprise detecting unit (402), electronic control unit (404) and release (406), wherein series connection one detecting unit (402) in the circuit between first binding post (110) and the electromagnetic mechanism (106), detecting unit (402) connects electronic control unit (404), electronic control unit (404) connects release (406), release (406) connects single operating mechanism (102), first contact (104) directly controlled by single operating mechanism (102) and second contact (108) divides, closing operation; One end of first binding post (110) joint detection unit (402), the other end that the other end of detecting unit (402) is linked an end, the electromagnetic mechanism (106) of electromagnetic mechanism (106) is linked first contact (104), first contact (104) and second contact (108) and is in series, second contact (108) is linked second terminals (112), and a current-limiting resistance (300) is connected in parallel on the two ends of second contact (108); Electromagnetic mechanism (106) only acts on second contact (108);
In when, in the circuit overload current taking place when, detecting unit (402) detects the fault current signal and is sent to electronic control unit (404), by the time of electronic control unit (404) decision time-delay, trigger release (406) action then, drive single operating mechanism (102) first contact (104) and second contact (108) are disconnected; When being short-circuited electric current in the circuit, still detect the fault current signal and be sent to electronic control unit (404) by detecting unit (402), electronic control unit (404) starts default short circuit delay procedure, in this section delay time, when if short trouble is eliminated, second contact (108) that is subjected to electromagnetic mechanism (106) effect and makes it to scold out is closed again, if short trouble is not eliminated, then electronic control unit (404) triggers release (406), it is acted on first contact (104) and second contact (108) are disconnected fully.
6. selective protection switch as claimed in claim 5 is characterized in that, described detecting unit (402) is a current transformer, passes the circuit between first terminals (110) and electromagnetic mechanism (106).
7. selective protection switch as claimed in claim 1, it is characterized in that, described trip gear (100) comprises first overcurrent trip (500) and second overcurrent trip (502), described second overcurrent trip (502) series connection one current-limiting resistance (300), one end of described second overcurrent trip (502) and current-limiting resistance (300) is connected between first contact (104) and second contact (108), the other end is connected in one second binding post (112), one end of described electromagnetic mechanism (106) connects first contact (104), the other end of electromagnetic mechanism (106) connects first binding post (110), one end of described first overcurrent trip (500) is connected in second contact (108), and the other end is connected in second binding post (112);
Single operating mechanism (102) links to each other with first overcurrent trip (500), second overcurrent trip (502), and act on first contact (104) and second contact (108), make it close, divide operation according to described first overcurrent trip (500), second overcurrent trip (502), electromagnetic mechanism (106) only acts on second contact (108); When protected circuit is in normal operating conditions, first contact (104) and second contact (108) are closed, and because the existence of current-limiting resistance, the current path of this switch inside flows through electromagnetic mechanism (106), first contact (104), second contact (108), first overcurrent trip (500) successively and flows out; When overload took place circuit, first overcurrent trip (500) acted on the single operating mechanism (106), and contact of winning (104) and second contact (108) are disconnected, and cut off overload current; When being short-circuited current conditions, second contact (108) is subjected to the effect of electromagnetic mechanism (106) is scolded out at once, and current path becomes at once: electromagnetic mechanism (106), first contact (104), current-limiting resistance (300), second overcurrent trip (502); Simultaneously, second overcurrent trip (502) detects fault current and correspondingly makes the reaction of delayed releasing, and in this section delay time, if short trouble is eliminated, second contact (108) is closed again so; If short trouble is not eliminated, then second overcurrent trip (502) acts on contact of winning (104) and second contact (108) is disconnected fully.
8. selective protection switch as claimed in claim 7, it is characterized in that, described trip gear (100) comprises first overcurrent trip (500) and second overcurrent trip (502), wherein first contact (104) one ends link to each other with electromagnetic mechanism (106), second contact (108) is connected with first overcurrent trip (500) and is linked second terminals (112) again, one current-limiting resistance (300) series connection second overcurrent trip (502) also together is connected in parallel on second contact (108) and the two ends of first overcurrent trip (500), single operating mechanism (102) and first, second overcurrent trip (500), (502) link to each other, and act on first and second contacts (104), (108) on, according to described first, second overcurrent trip (500), (502) it is closed, divide operation, electromagnetic mechanism (106) only acts on second contact (108);
When protected circuit is in normal operating conditions, first contact (104) and second contact (108) are closed, and because the existence of current-limiting resistance, the current path of this switch inside flows through electromagnetic mechanism (106), first contact (104), second contact (108), first overcurrent trip (500) successively and flows out; When overload took place circuit, first overcurrent trip (500) acted on the single operating mechanism (106), and contact of winning (104) and second contact (108) are disconnected, and cut off overload current; When being short-circuited current conditions, second contact (108) is subjected to the effect of electromagnetic mechanism (106) is scolded out at once, and current path becomes at once: electromagnetic mechanism, first contact (104), current-limiting resistance, second overcurrent trip (502); Simultaneously, second overcurrent trip (502) detects fault current and correspondingly makes the reaction of delayed releasing, and in this section delay time, if short trouble is eliminated, second contact (108) is closed again so; If short trouble is not eliminated, then second overcurrent trip (502) acts on contact of winning (104) and second contact (108) is disconnected fully.
9. as claim 7 or 8 described selective protection switch, it is characterized in that described first overcurrent trip (500) and second overcurrent trip (502) are bimetal leaf.
10. as each described selective protection switch in claim 1 to 3 or the claim 5 to 8; it is characterized in that; one end of first contact (104) other end and second contact (108) constitutes a pair of contact structure jointly, and perhaps first contact (104) and second contact (108) are the single contacts of two series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100297589A CN100477055C (en) | 2005-09-19 | 2005-09-19 | Selective protection switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100297589A CN100477055C (en) | 2005-09-19 | 2005-09-19 | Selective protection switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1753128A CN1753128A (en) | 2006-03-29 |
| CN100477055C true CN100477055C (en) | 2009-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100297589A Active CN100477055C (en) | 2005-09-19 | 2005-09-19 | Selective protection switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102194619B (en) * | 2010-03-16 | 2014-08-13 | 施耐德电器工业公司 | Test device for circuit breaker and circuit breaker with test device |
| DE102011075727A1 (en) * | 2011-05-12 | 2012-11-15 | Siemens Aktiengesellschaft | Device for triggering an electrical switch |
| EP4138110B1 (en) * | 2020-05-08 | 2024-07-31 | Huawei Digital Power Technologies Co., Ltd. | Circuit breaker and power distribution box |
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| CN1753128A (en) | 2006-03-29 |
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