CN102047370A - Electric selective automatic switch - Google Patents
Electric selective automatic switch Download PDFInfo
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- CN102047370A CN102047370A CN2009801196327A CN200980119632A CN102047370A CN 102047370 A CN102047370 A CN 102047370A CN 2009801196327 A CN2009801196327 A CN 2009801196327A CN 200980119632 A CN200980119632 A CN 200980119632A CN 102047370 A CN102047370 A CN 102047370A
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- fixed contact
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/1081—Modifications for selective or back-up protection; Correlation between feeder and branch circuit breaker
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H75/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of power reset mechanism
- H01H75/02—Details
- H01H75/04—Reset mechanisms for automatically reclosing a limited number of times
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Abstract
The invention relates to an electric selective automatic switch, particularly a circuit breaker, having a series connection from an auxiliary trigger device (6), a normally closed first switch (8), a resistor (10), and a main trigger device (12) that is connected between a first and a second electrical connection (2, 4), a shunt current path that is connected in series to the main trigger device (12) between the first and the second electrical connections (2, 4) and that has a second switch (14), which is closed if no malfunction exists, and a normally closed third switch (16), which is connected in series to the second switch (14), and a current bridge connecting an input contact of the first switch (8) to a connection contact (18) between the second and the third switches (14, 16), wherein the main trigger device (12) is configured such that upon achieving a first threshold current the second switch (14) is opened, and upon achieving a second threshold current, which is greater than the first threshold current, additionally the third switch (16) is opened, and wherein the auxiliary trigger device (6) is configured such that the first and the third switches (8, 16) are opened after expiration of a first time duration with the second switch (14) being open, while the first switch (8) is opened after expiration of a second time duration that is shorter than the first time duration with the second and third switches (14, 16) being open.
Description
The present invention relates to a kind of electronic selection formula automatic switch, relate to a kind of protection switch especially.The present invention be more particularly directed to have the electronic selection formula protection switch of low-power consumption.
DE 10354505 discloses a kind of electronic automatic switch.In this known electronic automatic switch, the push rod of armature clashes into contact bridge at direction of operating, makes the elastic collision that produces not only interrupt main circuit, but also the instantaneous interruption auxiliary circuit.This can cause guaranteeing that the function of auxilliary trigger equipment is effective.
DE 2854616 discloses the selective protection equipment that a kind of user selectively closes, and as possible, it has the main insurance that is positioned at the upstream.In the circuit of main line protection switch, switching device is set; can near small part current conversion when short circuit current occurring to being provided with along separate routes in parallel that magnetic triggers; wherein the shunt in parallel of equipment comprises a device; this device increases the electric current of the coil that passes through magnetic trigger according to the path of the preset value of the integrated square (zeitliche Stromquadratintegral) of time current; the current trigger circuit breaker finally disconnects the cut-off point in the main line protection switch circuit.
DE 4118377 discloses a kind of protection switch, at first only temporary close and wait for whether the protection switch in downstream disconnects short circuit of this protection switch under short-circuit conditions.In this case, protection switch reopens, otherwise its final plant closure.Therefore, power protection switch is set to, and is provided with by the caused heat of overload current to trigger bimetallic for example, trigger and the cut-off point of magnetic mechanism control by the caused magnetic mechanism of short circuit and by heat in its main circuit.Magnetic mechanism and cut-off point are provided with second heat and trigger for example second bimetallic, resistance and second cut-off point by the shunt current bridge joint in shunt current.Another circuit branch after cut-off point through the second magnetic mechanism until zero line, guide current is through having two parallel wires of the 3rd cut-off point, the 4th cut-off point respectively after the second magnetic mechanism for this circuit, and wherein first current branch also has second resistance.
In addition, E DIN VDE 0645 discloses main automatic fuse, wherein the first hot trigger equipment such as bimetallic, main switch and magnetic trigger equipment are connected in series in the main circuit, main switch is by the bypass bridge joint, selectivity resistance, the second hot trigger equipment and the backup circuit breaker that are used to trigger are connected in series in bypass, the first hot trigger equipment and the second hot trigger equipment act on a speed changer, and this speed changer is opened main switch and backup circuit breaker, and the magnetic trigger equipment acts on the main switch.
The purpose of this invention is to provide a kind of electronic selection formula automatic switch, in this switch, effectively guarantee on the one hand to be introduced in the auxiliary circuit, and make normal operating power loss minimum simultaneously at the electric current in service, that when main circuit interrupts, interrupt of main trigger equipment.
This purpose can realize by the electronic selection formula automatic switch according to claim 1.Dependent claims provides favourable design of the present invention.
Especially, according to electronic selection formula automatic switch of the present invention, refer in particular to protection switch, comprising: auxilliary trigger equipment, the series connection of closed first switch, resistance and main trigger equipment usually, described being connected in series between the first electronics link and the second electronics link; Shunt circuit is connected with main trigger equipment between the first electronics link and the second electronics link, and is included in second switch closed in the trouble-free situation and the 3rd closed usually switch, and the 3rd switch series is coupled to second switch; The electric current bridge, it connects the input contact and the connecting terminal between second switch and the 3rd switch of first switch, wherein main trigger equipment is provided so that second switch is opened when the first threshold electric current arrives, and the 3rd switch is opened when second threshold current greater than the first threshold electric current arrives; Wherein, auxilliary trigger equipment is provided so that during second switch is opened first switch and the 3rd switch were opened after at interval in the very first time, first switch was opened after second time interval during second switch and the 3rd switch opens, and described second time interval is less than described very first time interval.
In other words, electronic selection formula automatic switch according to the present invention is particularly useful as protection switch, and it is set to comprise first parallel control loop, second parallel control loop, and described switching circuit is connected with main trigger equipment respectively.In addition, first parallel control loop comprises the series connection of the first closed switch-dividing usually in auxilliary trigger equipment and the biswitch in its first shunt, and its second shunt formation has the shunt circuit of first switch of common closure.Second parallel control loop is in its first series connection that comprises in the biswitch usually closed second switch-dividing and resistance in along separate routes, its second shunt circuit that constitutes the second switch with common closure along separate routes.Main trigger equipment is provided so that first switch is opened when the first threshold electric current arrives, and second switch is opened when second threshold current greater than the first threshold electric current arrives.Auxilliary trigger equipment be set to during first switch opens through the very first time at interval the back and during second switch is opened first switch-dividing, second switch-dividing and the second switch through biswitch after less than the second time interval at interval very first time be opened.
In actual setting the of the present invention, preferably, the electric current bridge is made of contact bridge, and down, the electric current bridge is electrically connected first fixed contact of first switch and the 3rd fixed contact of second fixed contact and the 3rd switch in working order.
Only being disconnected with assurance auxiliary circuit interruption of current by auxilliary trigger equipment in order to ensure first switch is basic, is favourable when first fixed contact of the 3rd fixed contact of a side and opposite side and two opposite sides that second fixed contact is positioned at contact bridge.
In preferred implementation of the present invention, auxilliary trigger equipment comprises the bimetallic performer, it has first bimetallic between first link and first switch, the bimetallic performer is set to the circuit breaker of mechanism on contact bridge worked, wherein circuit breaker applies breakaway to contact bridge, breakaway along the disconnection directive effect that connects between the 3rd fixed contact and the contact bridge, between first fixed contact and the contact bridge and between second fixed contact and the contact bridge.
Therefore, be effectively when the bimetallic performer comprises second bimetallic between first switch and second link, second bimetallic can be set to be independent of first bimetallic and trigger circuit breaker by the bimetallic performer.
Preferably, in being provided with of first fixed contact and second fixed contact and/or in the layout of contact bridge, by activating circuit breaker after the 3rd fixed contact is disconnected, contact bridge at first disconnects with second fixed contact and then disconnects with first fixed contact.It at first is second fixed contact and contact bridge that this form of the composition causes, then be that first fixed contact and contact bridge disconnect effectively continuously.
For machine security of the present invention, simple execution mode, particularly advantageously be, if main trigger equipment comprises the electromagnetic actuator spare that mechanically acts on contact bridge, it has first armature and the connecting coil between the shunt circuit and second link that moves along direction of operating, wherein coil is adjusted on the direction of operating of first armature, the breakaway that applies by first armature along the disconnection directive effect that connects between the 3rd fixed contact and contact bridge, act between first fixed contact and contact bridge and second fixed contact and the contact bridge along the closing direction that connects.
In preferred implementation of the present invention, the connecting line when the breakaway of first armature is applied on the contact bridge between first fixed contact and second fixed contact forms the rotating shaft of contact bridge.
Preferably, the application point of the breakaway that applies of first armature is between first fixed contact and second fixed contact of the 3rd fixed contact of a side and opposite side.
In addition, when contact spring was set, it was favourable producing contact force along the closing direction of fixed contact respectively between in running order at the same time the 3rd fixed contact and contact bridge, between first fixed contact and the contact bridge and between second fixed contact and the contact bridge.
Particularly advantageously be, contact spring act on contact bridge away from second fixed contact and exceed first fixed contact and the part of second fixed contact on.
Therefore, particularly advantageously be, second switch comprises mobile contact, this contact is electrically connected first link and contact bridge under non-failure conditions, wherein preferably, after the contact that the direction of operating of removable armature moves is arranged on contact bridge and can rotate by whirligig, wherein, the rotating shaft parallel of the basic and contact bridge of the rotating shaft of whirligig.
For the second switch of electronic selection formula automatic switch according to the present invention and the simple mechanical switch between the 3rd switch is particularly advantageous is, electromagnetic actuator spare comprises the pin by the through hole extension of contact bridge, pin has the extension be positioned at contact bridge on the direction of operating of first armature before, wherein, the end of the pin of electromagnetic actuator spare is applicable to disconnection directive effect along current collector on this contact, and the extension is applicable to that disconnection directive effect along contact bridge is on contact bridge.
In this case, advantageously electromagnetic actuator spare is set in service at first armature, make between contact bridge and the contact of moving be connected being connected between the 3rd fixed contact and the contact bridge before be disconnected.
Another preferred embodiment in, electromagnetic actuator spare comprises core, described core is provided with towards the short-circuited conducting sleeve of first armature, described core when breaking down or the alternating current eddy current that produces by short-circuited conducting sleeve in service avoid the vibration of armature.Finally, another preferred embodiment in, safety in operation is improved, this is to comprise and can realize along second armature that direction of operating moves by electromagnetic actuator spare, preferably, the quality of second armature is greater than first armature, and the induction that is additional to the increase of first armature in electromagnetic actuator spare causes the accelerated motion of first armature on direction of operating.Setting by the second additional armature, when short circuit, the high overload electric current that the induction of the height of electromagnetic actuator spare causes is disconnected being connected between contact bridge and the 3rd fixed contact immediately, and the electric arc of there generation also effectively and is apace eliminated by the magnitude of current that increases under this failure condition.
Preferably, when auxilliary trigger equipment is set to manually connect, closed second switch at first, last closed the 3rd switch of closed then first switch.
Describe the present invention in the mode of embodiment with reference to the accompanying drawings hereinafter, wherein:
Fig. 1 is the function view according to electronic selection formula automatic switch of the present invention, and along continuous first fixed contact that is provided with of direction A and the detailed view of second fixed contact;
Figure 1B is the circuit diagram during according to electronic selection formula automatic switch failure-free operation of the present invention;
Fig. 2 A is the function diagram that electronic selection formula automatic switch according to the present invention is in the overload current state;
Fig. 2 B is the circuit diagram that electronic selection formula automatic switch according to the present invention is in the overload current state;
Fig. 3 A is the function diagram that electronic selection formula automatic switch according to the present invention is in short-circuit condition;
Fig. 3 B is the circuit diagram that electronic selection formula automatic switch according to the present invention is in short-circuit condition;
Fig. 4 A is the function diagram that electronic selection formula automatic switch according to the present invention is in closed condition;
Fig. 4 B is the circuit diagram that electronic selection formula automatic switch according to the present invention is in closed condition;
Fig. 5 A is the function diagram according to another execution mode of electronic selection formula automatic switch of the present invention failure-free operation;
Fig. 5 B is the circuit diagram according to another execution mode of electronic selection formula automatic switch of the present invention failure-free operation;
Fig. 6 is the circuit diagram of main automatic fuse during the short circuit load with selectivity triggering; And
Fig. 7 is according to the setting of selectivity resistance of the present invention in the magnetic circuit of kicker coil.
Figure 1A and 1B roughly illustrate structure and the corresponding equivalent circuit diagram that electronic selection formula automatic switch according to the present invention is in the operating state of opening.Shown in Figure 1B, automatic switch according to the present invention has the first electronics link 2 and the second electronics link 4, and auxilliary trigger equipment 6, first switch 8, resistance 10 and main trigger equipment 12 are connected in series between these two electronics links.In addition, electronic selection formula automatic switch according to the present invention has shunt circuit, it is connected with main trigger equipment 12 between first link 2 and second link 4 and the 3rd switch 16, the three switches 16 that are included in second switch closed under the non-failure conditions 14 and usually closed (normalerwise geschlossen) are connected with second switch 14.In addition, the input contact of first switch 8 by the electric current bridge be connected with connecting terminal 18 between the 3rd switch 16 at second switch 14.
Figure 1A illustrates the structure that electronic selection formula automatic switch according to the present invention is in the operating state of opening.The contact bridge 20 of Yi Donging and first fixed contact 22 that constitutes first switch, 8 input contacts, second fixed contact 24 that is connected with resistance 10 and the 3rd fixed contact 26 electrical connections that are connected with main trigger equipment 12 by shunt circuit rotationally.In addition, contact bridge 20 is contiguous with contact point 28 near first end, 30 places of second fixed contact 26 at it, and passes through second switch 14 and set up between main trigger equipment 12 and first link 2 and be electrically connected.Near the other end 32 of contact bridge, contact bridge 20 is by compression spring 34 supportings against brace table (Widerlager) 38, and brace table 38 is provided with near circuit breaker 36.Brace table 38 and the 3rd fixed contact 26 are positioned at the same side of contact bridge 20.On the side away from this side of contact bridge 20, first fixed contact 22 and second fixed contact 24 and produce between first fixed contact 22, second fixed contact 24 and the 3rd fixed contact 26 and are electrically connected between the application point and the 3rd fixed contact 26 of compression spring 34.Detailed description shown in Figure 1A, in first fixed contact 22 on the direction A vertical with figure plane and the spatial placement of second fixed contact 24, first fixed contact 22 and second fixed contact 24 are positioned at the same side.Therefore, second fixed contact 24 can be greater than the distance of first fixed contact 22 with brace table 38 with the distance of brace table 38.In working order down, first contact bridge, 20 support springs 34 are to first fixed contact 22 and second fixed contact, 24 applied pressures, and under the effect of the power of spring 34 around the rotating shaft X that connects first fixed contact 22 and second fixed contact 24 with as shown in Figure 1 counter clockwise direction rotation, make first end 30 of contact bridge 20 and contact point 28 be pressed towards the 3rd fixed contact 26.Compression spring 34 applies required contact pressure towards all fixed contacts 22,24 and 26, and this pressure makes first contact bridge 20 move until stationary device towards fixed contact point 22,24 and 26.
In addition, electronic selection formula automatic switch according to the present invention has mobile contact 40, and it is electrically connected first link 2 and contact bridge 20 under trouble-free situation.The contact 40 and first end 42 thereof that move are set in the oscillation bearing 44, and contact 40 is contiguous at its second end, 48 places and contact point 46 near contact bridge 20.The rotating shaft of oscillation bearing 44 is substantially parallel with the rotating shaft X of contact bridge 20.The contact 40 of moving is configured to be positioned at first fixed contact 22 and second fixed contact 24 the same side of contact bridge 20, and wherein, the compression spring 50 that brace table 52 is supported is towards the mobile contact 40 of contact bridge 20 extruding.The contact 40 of moving is connected to contact bridge 20 with first link 2 under trouble-free situation, and therefore produces closed second switch 14.What be arranged on the 3rd fixed contact 26 opposites is the stopper 54 that is fixed on the shell, and when contact bridge 20 moved towards the clockwise direction relative with the power of compression spring 34, stopper 54 was run into first end 30 of contact bridge 20, with the deflection of restriction contact bridge 20.
To be described in more detail main trigger equipment 12 hereinafter.Main trigger equipment has the coil 56 between second link 4 and auxilliary trigger equipment, and it is connected with second switch 14 and the 3rd switch 16.The main trigger equipment 12 that is set to electromagnetic actuator spare or electromagnetic system has coil core 58, pin 60 and first armature 62 that is positioned at coil 56 inside.In addition, second armature 64 is arranged in the coil 56 and can moves along triggering direction B, and to pin 60 generation effects.When inactive state, the power that second armature is compressed spring 66 is bearing on the stopper 68 that is fixed in shell.Be provided with short-circuited conducting sleeve 70 at core 58 towards a side of first armature 62, form eddy current in the short-circuited conducting sleeve 70 that the material by good conductive constitutes, the vibration that eddy current suppresses in the main trigger equipment 12 produces, thereby avoids sending bad noise.This is for being particularly advantageous with the alternating current operation, because the armature on the core 58 keeps friction when automatic switch triggers.
The rear end of pin 60 is bearing in the blind hole of second armature 64 relative with first armature 62.Pin 60 penetrates the axial hole that is arranged in first armature 62.First armature 62 can be directed axially moving in the blind hole of second armature 64, and is supported on the flange (Bund) 75 relative with the part of the diameter with increase of pin 60 in its side away from second armature.
The contiguous stopper 54 of first end of contact bridge 20 so the direction that guiding circuit breaker 36 points to along arrow C continues to move, disconnects the contact bridge 20 and first fixed contact 22 and second fixed contact 24, and the switch 8 of winning is opened.The location on triggering direction C by first fixed contact 22 and second fixed contact 24 at first makes second fixed contact 24 and contact bridge 20 disconnect, and first fixed contact 22 and contact bridge 20 are disconnected, and finally makes the circuit disconnection.
To describe in detail now according to electronic selection formula automatic switch of the present invention.
In failure condition, overload current appears between first link 2 and second link 4 by the low current shunt circuit, make coil 56 on first armature 62, produce magnetic force by induction, magnetic force makes second armature move towards the flange 75 of pin 60 along the power that triggering direction B overcomes spring 66, pin 60 overcomes the power of spring 66 in its mobile contact 40 of bump, application point place along triggering direction B then, be connected disconnection between the contact 40 of make moving and the contact bridge 20, shown in Fig. 2 A and Fig. 2 B.Extension 74 is installed on the pin 60, and contact bridge 20 still contacts with the 3rd fixed contact 26 and do not disconnect.Shown in the equivalent circuit diagram shown in Fig. 2 B, second switch 14 is opened, and first switch 8 and the 3rd switch 16 remain closed.Therefore, the bimetallic 76 of the bimetallic performer of the auxilliary trigger equipment 6 under the overload current situation is connected with the coil 56 of main trigger equipment 12 and by resistance 10 and the parallel circuits that the shunt circuit with the 3rd switch 16 constitutes, and wherein resistance 10 is by the shunt circuit short circuit.Cause first bimetallic 76 to be heated by the electric current that flows through first bimetallic 76, therefore above-mentioned circuit breaker 36 is opened after through very first time interval.In this case, overload current is corresponding to the first threshold electric current, and threshold current can be regulated (for example, corresponding scale between the power of the spring force by spring 66 and coil 56) with instrument by electronic selection formula automatic switch.
Because the first threshold electric current is instantaneous the crossing under at interval in the very first time, be connected closure once more between the contact 40 of moving and the contact bridge 20, thereby bimetallic 76 had the shunt circuit short circuit of first switch 14.Therefore, only there is the instantaneous increase of operating current and do not trigger circuit breaker 36.The purpose of this function is to be set to main switch by electronic selection formula automatic switch, wherein the overload current of Chu Xianing is at first eliminated by the terminal use by the safeties that are positioned at behind the main switch, and does not disconnect total power supply of great amount of terminals user as the electronic selection formula automatic switch of main switch work.
In the short circuit current situation, electronic selection formula automatic switch was set to activate circuit breaker 36 in very short time in promptly basic second time interval shorter at interval than the very first time.Fig. 3 A and Fig. 3 B illustrate this situation.Because short circuit current i.e. second threshold current, near the contact 40 of moving, contact bridge 20 is moved along triggering direction B by extension 74, make the disconnection that is connected of contact bridge 20 and the 3rd fixed contact 26, second switch 14 and the 3rd switch 16 are opened, shown in equivalent circuit diagram 3B.Therefore, the short circuit current resistance 10 that flows through first bimetallic 76, first switch 8, restriction electric current flows to second link 4 through coils 56.Short circuit current causes the unexpected heating of first bimetallic 76, and therefore, circuit breaker 36 is activated immediately.Under the situation of short interruption, second armature 64 make the 3rd fixed contact 26 immediately with the contact path
Disconnect, make and insert even without any moving component, the also arc current of restriction on the 3rd fixed contact 26 completely effectively, thus guarantee to eliminate electric arc.Under the situation that high short circuit current occurs, second armature 64 along triggering that direction B moves and the layout of rear end by pin 60 acts directly on the pin 60, moves it immediately immediately towards contact bridge 20 along triggering direction.
Fig. 5 A and Fig. 5 B illustrate another execution mode according to electronic selection formula automatic switch of the present invention.Auxilliary trigger equipment 6 has the bimetallic performer, has second bimetallic 78 that is positioned at first bimetallic, 76 sides, the triggering that bimetallic 78 is set to be independent of first bimetallic 76 and causes circuit breaker 36 by the bimetallic performer.Second bimetallic 78 is connected between second fixed contact 24 and the coil 56.Second bimetallic 78 only is activated under short-circuit conditions or when surpassing second threshold current because under second threshold current time second bimetallic 78 and resistance 10 by shunt circuit by 16 short circuits of the 3rd switch.Therefore, second bimetallic 78 has and utilizes the function of opening circuit breaker 36 time of delay, and this time of delay is substantially less than time of delay of first bimetallic 76.
The invention provides a kind of electronic selection formula automatic switch, optionally disconnect through this electronic selection formula automatic switch after a while when overload current occurring, wherein, time can be measured like this, the terminal use can close electronic automatic switch subsequently before closing as the main switch of electronic selection formula automatic switch operation, when short circuit occurring, main switch disconnects being connected between first link 2 and second link 4 immediately.Electronic automatic switch according to the present invention has beneficial effect, normally in service, electric current between first link 2 and second link 4 substantially only flows through the coil 56 of main trigger equipment 12, because first bimetallic 76 or second bimetallic 78 shunt circuit by having second switch 14 and the 3rd switch 16 is by short circuit.Therefore, can make power consumption minimum according to electronic selection formula automatic switch of the present invention.In addition, electronic selection formula automatic switch according to the present invention has beneficial effect, and before disconnecting by circuit breaker 36, the continuous current that is used to control the auxiliary circuit of circuit breaker 36 is guaranteed, and avoids the auxilliary operating mistake of trigger equipment thus.
The favourable setting of resistance 10 and coil 56 will be described hereinafter, in conjunction with explaining its principle of work and power better by the automatic fuse of simplifying of master among Fig. 6 and Fig. 7.The setting of selectivity resistance 101 and kicker coil 102 and layout are applicable to resistance 10 and the coil 56 that is configured to coil.
For the electric current restriction of short-circuit conditions, main automatic fuse uses the resistance in 0.5 ohm of scope.
In about 10 milliseconds opening time, the selectivity resistor power is basic fault-free when 100 kilowatts of orders of magnitude.This needs quite large-sized selectivity resistance, for example describes in detail among the European application WO03/065398A1.Recommend to use pottery as the selectivity resistive element.Except the coil that resistance wire twines, reeled or the resistance of the restriction electric current that twines as the flat rubber belting that constitutes by resistance material
Also be known.
Except the measure of avoiding bad magnetic field that is realized by this set, the space in " minimum circuit breaker " is usually also unavailable.
Shortcoming in essence is, short circuit for example during 5 times of rated current the magnetic field of kicker coil enough disconnect main contacts, during time-delay is opened circuit, also keep the disconnection of main contacts.By the electric current restriction of selectivity resistance, the electric current in the kicker coil will be reduced to 3 times of rated current, and magnetic pumping no longer enough keeps armature to overcome the power of the switching-in spring of main contacts.Consequently, the closed in short-term and disconnection more immediately of main contacts.The alternation procedure that this professional domain is called " woodpecker " is worthless.
The selectivity resistance that obtains according to the present invention can be the resistance 10 shown in Fig. 1 to Fig. 5, is set up the kicker coil (can be coil 56) that is used as the coil that is twined by resistance material and passes main circuit.
Therefore, make the free space placement selectivity resistance between the shell wall that utilizes kicker coil and main automatic fuse become possibility.
By this simple measure, can be by the additional number of turns of the selectivity resistance of connecting with kicker coil itself, make flux available in the magnetic circuit that produces by limited residual current greater than by electromagnet operating current produced.Armature makes main contacts guarantee to disconnect in time of delay, will lead the circuit breaker release (entklinken) of automatic fuse up to the selectivity bimetallic, and this is with interrupt circuit.
Selectivity triggers and kicker coil constitutes construction unit jointly, its by common magnet yoke ring around, construction unit has magnetic core, armature and selectivity bimetallic in addition.
Preferably, yoke is formed so that it not only as the lead of magnetic flux, is gone back as magnetic screen and heat shielding at contiguous instrument.Yoke is not only carried the selectivity bimetallic, goes back box ground around kicker coil four sides as coil shape selectivity resistance, and between the shell wall that is arranged at selectivity resistance and main automatic fuse of spatially two-sided (beidseitig).
If it is favourable that the complete selectivity trigger that is positioned at the same side jointly with kicker coil is interrupted by the switching technique (schaltungstechnisch) along the energy Flow direction of main contacts and break contact.
In addition, the coiling direction of selectivity resistance and kicker coil can the selected magnetic action effect that produces with offset current.
In Fig. 6, can find out that by the schematic diagram of main automatic fuse selectivity resistance 101 passes the setting of kicker coil 102.Similarly, the location of the switching technique of selectivity trigger is counted as parallel circuits.The on off state of describing meets " short circuit " fault in time of delay.
When being in opening, main contacts 103 and break contact 104 closures.Operating current flows through main contacts 103 and kicker coil 102 until the power supply user.
Therefore, short circuit current is limited by selectivity resistance 101.
Residual current not only flows through selectivity bimetallic 106 and also flows through selectivity resistance 101 and kicker coil 102.Residual current produces the additional magnetic induction in the selectivity resistance, and magnetic induction is also guaranteed the enough braking force of the armature 105 on magnetic core 108 by disconnecting main contacts 103 strengthens armature 105 in the magnetic circuit of kicker coil gravitation in time of delay.
In the meantime, selectivity bimetallic 106 crooked and release circuit breakers, circuit breaker makes break contact 104 disconnect subsequently, keeps main contacts 103 to disconnect and interrupt protected circuit.If for example interrupt by the line protection switch in downstream another position at circuit in time of delay, the main automatic fuse of maintenance closes a floodgate and guarantees to remain device and can use.
The horizontal cross-section of the top view of the automatic fuse of master shown in Figure 7.It is conspicuous that the space of selectivity resistance 101 on kicker coil 102 is provided with, and is visible shell 110 in and as the structure at the yoke 107 of heat shielding of being close to instrument and magnetic screen.
When having fault, flux in the magnetic circuit not only also produces by the spiral of kicker coil 102 by the number of turns of selectivity resistance 10, make and guarantee enough by the residual current of selectivity resistance limits, so that armature 105 is remained on the magnetic core 108, the power that makes main contacts 103 overcome switching-in spring 109 is fixed on the position of disconnection.
Therefore, be that main automatic fuse is provided with the selectivity trigger, in selectivity bimetallic and selectivity resistance that series connection is provided with, trigger is set to the parallel circuits with respect to main contacts, and main contacts is bridged in " short circuit " failure condition.Selectivity resistance 101 is set as coil and is arranged in the magnetic circuit of kicker coil 102, is used for the power effect that magnetic is supported the disconnection of main contacts 103 and kept disconnecting.
Be arranged between yoke 107 and the kicker coil 102 to selectivity resistance 101 spaces, at least in part around and cover kicker coil 102.
The selectivity trigger is co-located on the same side of the energy Flow direction of main contacts 103 and break contact 104 by switching technique and kicker coil 102.
Selectivity trigger and kicker coil 102, magnetic core 108, armature 105, selectivity resistance 101, selectivity bimetallic 106 and yoke 107 be common to constitute construction units, wherein provides fixing near the yoke of shell wall 110 for the basic point of selectivity bimetallic 106 in large area.
Setting and kicker coil 102 as the selectivity resistance 101 of coil setting are applicable to according to resistance 10 shown in Fig. 1 to Fig. 5 of the present invention and coil 56.
Claims (18)
1. an electronic selection formula switch refers in particular to protection switch, comprising:
-auxilliary trigger equipment (6), the series connection of closed first switch (8), resistance (10) and main trigger equipment (12) usually, described being connected in series between the first electronics link (2) and the second electronics link (4);
-shunt circuit, between the described first electronics link (2) and the described second electronics link (4), connect with described main trigger equipment (12), and be included in second switch (14) closed in the trouble-free situation and closed usually the 3rd switch (16), described the 3rd switch (16) is connected with described second switch (14); And
-electric current bridge, described electric current bridging connect the input contact of described first switch (8) and be positioned at described second switch (14) and described the 3rd switch (16) between connecting terminal (18),
Wherein, described main trigger equipment (12) is provided so that described second switch (14) is opened when the first threshold electric current arrives, and described the 3rd switch (16) is opened when second threshold current greater than described first threshold electric current arrives; And
Described auxilliary trigger equipment (6) is provided so that during described second switch (14) is opened described first switch (8) and described the 3rd switch (16) were opened after at interval in the very first time, described first switch (8) was opened after second time interval during described second switch (14) and described the 3rd switch (16) are opened, described second time interval less than the described very first time at interval.
2. electronic selection formula automatic switch as claimed in claim 1, wherein, described electric current bridge is made of contact bridge (20), down, described electric current bridge is electrically connected first fixed contact (22) of described first switch (8) and the 3rd fixed contact (26) of second fixed contact (24) and described the 3rd switch (16) in working order.
3. electronic selection formula automatic switch as claimed in claim 1 or 2, wherein, the 3rd fixed contact (26) of a side and first fixed contact (22) of opposite side and second fixed contact (24) are positioned at the two opposite sides of described contact bridge (20).
4. as claim 1,2 or 3 described electronic selection formula automatic switches, wherein, described auxilliary trigger equipment (6) comprises the bimetallic performer, described bimetallic performer comprises first bimetallic (76) that is positioned between described first link (2) and described first switch (8), described bimetallic performer is set to the circuit breaker (36) of mechanism on described contact bridge (20) worked, by described circuit breaker (36) on the breakaway that described contact bridge (20) applies acts on the disconnection direction that is connected between described the 3rd fixed contact (26) and the described contact bridge (20), between described first fixed contact (22) and the described contact bridge (20) and on the disconnection direction that is connected between described second fixed contact (24) and the described contact bridge (20).
5. electronic selection formula automatic switch as claimed in claim 4, wherein, described bimetallic performer comprises second bimetallic (78) that is positioned between described first switch (8) and described second link (4), and described second bimetallic (78) can be set to be independent of described first bimetallic (76) and cause described circuit breaker (36) to be triggered by described bimetallic performer.
6. as claim 4 or 5 described electronic selection formula automatic switches, wherein, in the layout of the setting of described first fixed contact (22) and described second fixed contact (24) and/or described contact bridge (20), at first disconnect and then disconnect with described first fixed contact (22) with described second fixed contact (24) when described circuit breaker (36) is disconnected the described contact bridge in back (20) in described the 3rd fixed contact (26) when being triggered.
7. as each described electronic selection formula automatic switch in the claim 2 to 6, wherein, described main trigger equipment (12) comprises the electromagnetic actuator spare that mechanically acts on described contact bridge (20), described electromagnetic actuator spare comprise first armature (62) that can be in described performer moves along direction of operating and be positioned at shunt circuit and described second link (4) between connecting coil (56), described connecting coil (56) is adjusted on the direction of operating (B) of described first armature (62), and the breakaway that is applied by described first armature (62) acts on the disconnection direction that is connected between described the 3rd fixed contact (26) and the described contact bridge (20), on the closing direction that is connected between described first fixed contact (22) and described contact bridge (20) and described second fixed contact (24) and the described contact bridge (20).
8. electronic selection formula automatic switch as claimed in claim 7, wherein, when the breakaway of described first armature (62) was applied on the described contact bridge (20), the connecting line (X) between described first fixed contact (22) and described second fixed contact (24) formed the rotating shaft of described contact bridge (20).
9. as each described electronic selection formula automatic switch in the claim 7 to 8, wherein, the application point of the breakaway that applies of described first armature (62) is positioned between first fixed contact (22) and second fixed contact (24) of the 3rd fixed contact (26) of a side and opposite side.
10. as each described electronic selection formula automatic switch in the claim 7 to 9, wherein, contact spring (34) be set in running status simultaneously between described the 3rd fixed contact (26) and the described contact bridge (20), between described first fixed contact (22) and the described contact bridge (20) and between described second fixed contact (24) and the described contact bridge (20) respectively with the closing direction generation contact force of fixed contact (22,24,26).
11. electronic selection formula automatic switch as claimed in claim 10, wherein, be positioned at away from described the 3rd fixed contact (26) and exceed described first fixed contact (22) and contact bridge (20) part of described second fixed contact (24) on contact spring (34) act on described contact bridge (20).
12. as each described electronic selection formula automatic switch in the claim 2 to 11, wherein, described second switch (14) comprises mobile contact (40), and described contact (40) are electrically connected described first link (2) and described contact bridge (20) under non-failure conditions.
13. electronic selection formula automatic switch as claimed in claim 12, wherein, be disposed in described contact bridge (20) along the mobile contact (40) of the direction of operating (B) of described first armature (62) and arranged rotatably by whirligig (44) also that afterwards the rotating shaft of described whirligig (44) is basic parallel with the rotating shaft (X) of described contact bridge (20).
14. as claim 12 or 13 described electronic selection formula automatic switches, wherein, electromagnetic actuator spare comprises the pin (60) that extends by the through hole of described contact bridge (20) (72), described pin (60) has be positioned at the preceding extension (74) of described contact bridge (20) on the direction of operating (B) of described first armature (62), the front end of the pin of described electromagnetic actuator spare (60) is applicable to disconnection directive effect along described mobile contact (40) on described contact (40), and described extension (74) are applicable to that disconnection directive effect along described contact bridge (20) is on described contact bridge (20).
15. as each described electronic selection formula automatic switch in the claim 7 to 14, wherein, described electromagnetic actuator spare is set in service at described first armature (62), make be disconnected being connected between described the 3rd fixed contact (26) and described contact bridge (20) before, being connected between described contact bridge (20) and the described mobile contact (40) is disconnected.
16. as each described electronic selection formula automatic switch in the claim 7 to 15, wherein, described electromagnetic actuator spare comprises core (58), described core (58) is provided with the short-circuited conducting sleeve (70) towards described first armature (62).
17. as each described electronic selection formula automatic switch in the claim 7 to 16, wherein, described electromagnetic actuator spare comprises can be along mobile second armature (64) of described direction of operating (B), the quality optimization ground of described second armature (64) is greater than described first armature (62), and the induction of the increase by being additional to described first armature (62) in described electromagnetic actuator spare causes the accelerated motion of described first armature (62) on described direction of operating (B).
18. as each described electronic selection formula automatic switch in the above-mentioned claim, wherein, when described auxilliary trigger equipment is set to manually connect, at first closed described second switch (14), last closed described the 3rd switch (16) of closed then described first switch (8).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1020080268135 | 2008-06-05 | ||
| DE102008026813.5A DE102008026813B4 (en) | 2008-06-05 | 2008-06-05 | Electric selective auto switch |
| DE102008026813.5 | 2008-06-05 | ||
| PCT/EP2009/003968 WO2009146900A1 (en) | 2008-06-05 | 2009-06-03 | Electric selective automatic switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102047370A true CN102047370A (en) | 2011-05-04 |
| CN102047370B CN102047370B (en) | 2013-10-30 |
Family
ID=40982289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980119632.7A Active CN102047370B (en) | 2008-06-05 | 2009-06-03 | Electric selective automatic switch |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2286432B1 (en) |
| CN (1) | CN102047370B (en) |
| DE (1) | DE102008026813B4 (en) |
| WO (1) | WO2009146900A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107210168A (en) * | 2015-01-23 | 2017-09-26 | J·斯姆尔科利 | Line protection switch |
| CN109961986A (en) * | 2017-12-14 | 2019-07-02 | 施耐德电器工业公司 | Electrical equipment for the electric current in foundation or disconnecting circuit |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011008078A1 (en) | 2011-01-08 | 2012-07-12 | Peter Flohr | Main circuit breaker has thermal trigger whose longitudinal axis is perpendicular to attachment plane of switching device and longitudinal axis of magnetic trip |
| GB2619070A (en) * | 2022-05-26 | 2023-11-29 | Eaton Intelligent Power Ltd | Switching arrangement with a current sensitive latched switching contact and a second non-latched switching contact |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2854616A1 (en) * | 1978-12-18 | 1980-06-19 | Bbc Brown Boveri & Cie | SELECTIVE PROTECTIVE DEVICE |
| DE4118377A1 (en) * | 1991-06-05 | 1992-12-10 | Hager Electro Gmbh | Overcurrent protection switch with mechanical device for re-closure - incorporates interacting system of levers and stops allowing rapid reversal of short-circuit-provoked temporary opening |
| CN1108426A (en) * | 1993-12-24 | 1995-09-13 | 施内德电气公司 | Electric switch device with separable contacts |
| EP1365432A1 (en) * | 2002-05-21 | 2003-11-26 | HAGER ELECTRO GmbH | Circuit and/or apparatus protection switch |
| DE10354505A1 (en) * | 2003-11-21 | 2005-07-07 | Eti Elektroelement D.D. | Electric auto switch |
| CN101101819A (en) * | 2007-07-27 | 2008-01-09 | 浙江正泰电器股份有限公司 | Automatic change-over switch |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3820993A1 (en) * | 1988-06-22 | 1989-12-28 | Hager Electro Gmbh & Co | PROTECTIVE SWITCH AGAINST OVERCURRENT AND SHORT CIRCUIT |
| DE102006037233A1 (en) * | 2006-08-09 | 2008-02-14 | Siemens Ag | Protective switch for selective switching of excess current has two line connections and magnetic release device with excitation coil, armature, anchor and release element |
-
2008
- 2008-06-05 DE DE102008026813.5A patent/DE102008026813B4/en not_active Expired - Fee Related
-
2009
- 2009-06-03 EP EP09757283.8A patent/EP2286432B1/en active Active
- 2009-06-03 CN CN200980119632.7A patent/CN102047370B/en active Active
- 2009-06-03 WO PCT/EP2009/003968 patent/WO2009146900A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2854616A1 (en) * | 1978-12-18 | 1980-06-19 | Bbc Brown Boveri & Cie | SELECTIVE PROTECTIVE DEVICE |
| DE4118377A1 (en) * | 1991-06-05 | 1992-12-10 | Hager Electro Gmbh | Overcurrent protection switch with mechanical device for re-closure - incorporates interacting system of levers and stops allowing rapid reversal of short-circuit-provoked temporary opening |
| CN1108426A (en) * | 1993-12-24 | 1995-09-13 | 施内德电气公司 | Electric switch device with separable contacts |
| EP1365432A1 (en) * | 2002-05-21 | 2003-11-26 | HAGER ELECTRO GmbH | Circuit and/or apparatus protection switch |
| DE10354505A1 (en) * | 2003-11-21 | 2005-07-07 | Eti Elektroelement D.D. | Electric auto switch |
| CN101101819A (en) * | 2007-07-27 | 2008-01-09 | 浙江正泰电器股份有限公司 | Automatic change-over switch |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107210168A (en) * | 2015-01-23 | 2017-09-26 | J·斯姆尔科利 | Line protection switch |
| CN109961986A (en) * | 2017-12-14 | 2019-07-02 | 施耐德电器工业公司 | Electrical equipment for the electric current in foundation or disconnecting circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102008026813A1 (en) | 2009-12-10 |
| EP2286432A1 (en) | 2011-02-23 |
| DE102008026813B4 (en) | 2016-11-17 |
| CN102047370B (en) | 2013-10-30 |
| EP2286432B1 (en) | 2016-04-13 |
| WO2009146900A1 (en) | 2009-12-10 |
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