CN102047370B - Electric selective automatic switch - Google Patents
Electric selective automatic switch Download PDFInfo
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- CN102047370B CN102047370B CN200980119632.7A CN200980119632A CN102047370B CN 102047370 B CN102047370 B CN 102047370B CN 200980119632 A CN200980119632 A CN 200980119632A CN 102047370 B CN102047370 B CN 102047370B
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- 230000000694 effects Effects 0.000 claims description 10
- 230000006698 induction Effects 0.000 claims description 6
- 230000033001 locomotion Effects 0.000 claims description 5
- 230000001960 triggered effect Effects 0.000 claims 2
- 230000007257 malfunction Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 14
- 230000002349 favourable effect Effects 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 241000287509 Piciformes Species 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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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 electric selective automatic switch, relate to especially a kind of protection switch.The present invention be more particularly directed to have the electric selective protection switch of low-power consumption.
DE10354505 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, so that the elastic collision that produces is not only interrupted main circuit, but also the instantaneous interruption auxiliary circuit.This can cause guaranteeing that the function of auxiliary trigger equipment is effective.
DE2854616 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 be with at least part of current conversion to being provided with along separate routes in parallel that magnetic triggers when short circuit current occurring; 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.
DE4118377 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 the second heat and trigger for example the second bimetallic, resistance and the 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 respectively two parallel wires of the 3rd cut-off point, the 4th cut-off point after the second magnetic mechanism for this circuit, and wherein the first current branch also has the 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 be used for 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 electric selective automatic switch, in this switch, effectively guarantee on the one hand to be introduced in the auxiliary circuit at the electric current in service, that when main circuit interrupts, interrupt of main trigger equipment, and make simultaneously normal operating power loss minimum.
Especially, according to electric selective automatic switch of the present invention, refer in particular to protection switch, comprising: the series connection of auxiliary trigger equipment, logical normally closed the first switch, resistance and main trigger equipment, 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 logical normally closed the 3rd switch, and the 3rd switch series is coupled to second switch; The electric current bridge, it connects input contact and the connecting terminal between second switch and the 3rd switch of the 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 the Second Threshold electric current greater than the first threshold electric current arrives; Wherein, auxiliary trigger equipment is provided so that the first switch and the 3rd switch are opened during second switch is opened behind very first time interval, the 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, electric selective automatic switch according to the present invention is particularly useful as protection switch, and it is set to comprise the first parallel control loop, the second parallel control loop, and described switching circuit is connected with main trigger equipment respectively.In addition, the first parallel control loop comprises the series connection of logical normally closed the first switch-dividing in auxiliary trigger equipment and the biswitch in its first shunt, and its second shunt consists of the shunt circuit with logical normally closed first switch.The second parallel control loop is in its first series connection that comprises in the biswitch usually closed the second switch-dividing and resistance in along separate routes, and it second consists of the shunt circuit with logical normally closed second switch along separate routes.Main trigger equipment is provided so that the first switch is opened when the first threshold electric current arrives, and second switch is opened when the Second Threshold electric current greater than the first threshold electric current arrives.The first switch-dividing, the second switch-dividing and the second switch of biswitch were opened after auxiliary trigger equipment was set to pass through less than second time interval at very first time interval after passing through very first time interval during the first switch opens and during second switch is opened.
In actual setting the of the present invention, preferably, the electric current bridge is made of contact bridge, and lower in working order, the electric current bridge is electrically connected the first fixed contact of the first switch and the 3rd fixed contact of the second fixed contact and the 3rd switch.
In order to ensure the basic interruption that is only disconnected guaranteeing the auxiliary circuit electric current by auxiliary trigger equipment of the first switch, when the first fixed contact of the 3rd fixed contact of a side and opposite side and two opposite sides that the second fixed contact is positioned at contact bridge, be favourable.
In preferred implementation of the present invention, auxiliary trigger equipment comprises the bimetallic performer, it has the first bimetallic between the first link and the 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 the first fixed contact and the contact bridge and between the second fixed contact and the contact bridge.
Therefore, be effectively when the bimetallic performer comprises the second bimetallic between the first switch and the second link, the second bimetallic can be set to be independent of the first bimetallic and trigger circuit breaker by the bimetallic performer.
Preferably, in the arranging of the first fixed contact and the 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 the second fixed contact and then disconnects with the first fixed contact.It at first is the second fixed contact and contact bridge that this form of the composition causes, then be that the 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 the first armature and the connecting coil between shunt circuit and the second link that moves along direction of operating, its coil is adjusted at the direction of operating of the first armature, the breakaway that is applied by the first armature along the disconnection directive effect that connects between the 3rd fixed contact and contact bridge, act between the first fixed contact and contact bridge and the 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 the first armature is applied on the contact bridge between the first fixed contact and the second fixed contact forms the rotating shaft of contact bridge.
Preferably, the application point of the breakaway that applies of the first armature is between first fixed contact and the second fixed contact of the 3rd fixed contact of a side and opposite side.
In addition, when contact spring is set, at the same time between in running order the 3rd fixed contact and contact bridge, to produce contact force along the closing direction of fixed contact respectively between the first fixed contact and the contact bridge and between the second fixed contact and the contact bridge be favourable.
Particularly advantageously be, contact spring act on contact bridge away from the second fixed contact and exceed the first fixed contact and the part of the second fixed contact on.
Therefore, particularly advantageously be, second switch comprises mobile contact, this contact is electrically connected the 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 of whirligig is basic parallel with the rotating shaft of contact bridge.
For according to the second switch of electric selective automatic switch of 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 before the direction of operating of the first armature is positioned at contact bridge, 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 disconnection directive effect along contact bridge on contact bridge.
In this case, advantageously electromagnetic actuator spare is set in service at the first armature, make between contact bridge and the mobile contact be connected to 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 the first armature, described core when breaking down or the alternating current eddy current that is produced 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 the second armature that direction of operating moves by electromagnetic actuator spare, preferably, the quality of the second armature is greater than the first armature, and the induction that is additional to the increase of the first armature in electromagnetic actuator spare causes the accelerated motion of the 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 rapidly eliminated by the magnitude of current that increases under this failure condition.
Preferably, when auxiliary trigger equipment is set to manually connect, closed second switch at first, then last closed the 3rd switch of closed the 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 electric selective automatic switch of the present invention, and along continuous the first fixed contact that arranges of direction A and the detailed view of the second fixed contact;
Figure 1B is the circuit diagram during according to electric selective automatic switch failure-free operation of the present invention;
Fig. 2 A is the function diagram that electric selective automatic switch according to the present invention is in the overload current state;
Fig. 2 B is the circuit diagram that electric selective automatic switch according to the present invention is in the overload current state;
Fig. 3 A is the function diagram that electric selective automatic switch according to the present invention is in short-circuit condition;
Fig. 3 B is the circuit diagram that electric selective automatic switch according to the present invention is in short-circuit condition;
Fig. 4 A is the function diagram that electric selective automatic switch according to the present invention is in closed condition;
Fig. 4 B is the circuit diagram that electric selective automatic switch according to the present invention is in closed condition;
Fig. 5 A is the function diagram according to another execution mode of electric selective automatic switch failure-free operation of the present invention;
Fig. 5 B is the circuit diagram according to another execution mode of electric selective automatic switch failure-free operation of the present invention;
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 electric selective automatic switch according to the present invention is in the operating state of opening.As shown in Figure 1B, automatic switch according to the present invention has the first electronics link 2 and the second electronics link 4, and auxiliary trigger equipment 6, the first switch 8, resistance 10 and main trigger equipment 12 are connected in series between these two electronics links.In addition, electric selective automatic switch according to the present invention has shunt circuit, it is connected with main trigger equipment 12 between the first link 2 and the 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 the 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 electric selective automatic switch according to the present invention is in the operating state of opening.Rotationally mobile contact bridge 20 and the first fixed contact 22 that consists of the first switch 8 input contacts, the 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.In addition, contact bridge 20 is contiguous with contact point 28 near first end 30 places of the second fixed contact 26 at it, and passes through second switch 14 and set up between main trigger equipment 12 and the first link 2 and be electrically connected.Near the other end 32 of contact bridge, contact bridge 20 is by Compress Spring 34 supportings against brace table (Widerlager) 38, and brace table 38 arranges 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, the first fixed contact 22 and the second fixed contact 24 and produce between the first fixed contact 22, the 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 Compress Spring 34.Detailed description shown in Figure 1A, during the first fixed contact 22 on the direction A vertical with figure plane and the space of the second fixed contact 24 were arranged, the first fixed contact 22 and the second fixed contact 24 were positioned at the same side.Therefore, the second fixed contact 24 can be greater than the distance of the first fixed contact 22 with brace table 38 with the distance of brace table 38.Lower in working order, the first contact bridge 20 support springs 34 are to the first fixed contact 22 and the second fixed contact 24 applied pressures, and under the effect of the power of spring 34 around the rotating shaft X that connects the first fixed contact 22 and the second fixed contact 24 with as shown in Figure 1 counter clockwise direction rotation, so that the first end 30 of contact bridge 20 and contact point 28 are pressed towards the 3rd fixed contact 26.Compress Spring 34 applies required contact towards all fixed contacts 22,24 and 26, and this pressure makes the first contact bridge 20 move until stationary device towards fixed contact point 22,24 and 26.
In addition, electric selective automatic switch according to the present invention has mobile contact 40, and it is electrically connected the first link 2 and contact bridge 20 in trouble-free situation.Mobile contact 40 and first end 42 thereof are arranged 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.Mobile contact 40 is configured to be positioned at the first fixed contact 22 and the second fixed contact 24 the same side of contact bridge 20, and wherein, the Compress Spring 50 that brace table 52 supports is towards the mobile contact 40 of contact bridge 20 extruding.Mobile contact 40 is connected to contact bridge 20 with the first link 2 in 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 Compress Spring 34, stopper 54 was run into the first end 30 of contact bridge 20, with the deflection of Restricted Contact bridge 20.
To be described in more detail main trigger equipment 12 hereinafter.Main trigger equipment has the coil 56 between the second link 4 and auxiliary 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 the first armature 62 that is positioned at coil 56 inside.In addition, the 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 of the compressed spring 66 of the second armature 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 the first armature 62, form eddy current in the short-circuited conducting sleeve 70 that the material by good conductive consists of, 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.
Pin 60 can be arranged in the core 58 and along triggering direction A and move axially, and passes through Compress Spring 66 towards triggering direction B biasing.The front end of pin 60 axially stretches out from core 58 towards contact bridge 20 and mobile contact 40, consists of the striker that excites mobile contact 40, and wherein the application point of pin 60 is between the oscillation bearing 44 and Compress Spring 50 of mobile contact 40.Therefore, the through hole 72 that pin 60 passes contact bridge 20 extends, pin 60 front ends on the excitation direction B of the first armature 62 and before being positioned at contact bridge are provided with to have and increase large diameter extension (Aufweitung) or part 74, and extension or part 74 are greater than the through hole 72 of contact bridge 20.When pin 60 moves along the excitation direction B of armature 62, extension 74 bump contact bridges 20, move towards the counter clockwise direction relative with the power of Compress Spring 34 so that contact bridge 20 winds the rotating shaft X that is made of the first fixed contact 22 and the second fixed contact 24, and contact bridge 20 and the 3rd fixed contact 26 are disconnected.Extension 74 is arranged on the pin 60, before pin 60 makes contact bridge 20 and 26 disconnections of the 3rd fixed contact mobile contact 40 and contact bridge 20 is disconnected.
The rear end of pin 60 is bearing in the blind hole of the second armature 64 relative with the first armature 62.Pin 60 penetrates the axial hole that is arranged in the first armature 62.The first armature 62 can be directed with axially mobile in the blind hole of the 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 the second armature.
The contiguous stopper 54 of the first end of contact bridge 20 so the direction that guiding circuit breaker 36 points to along arrow C continues to move, disconnects contact bridge 20 and the first fixed contact 22 and the second fixed contact 24, so that the first switch 8 is opened.The location on triggering direction C by the first fixed contact 22 and the second fixed contact 24 at first makes the second fixed contact 24 and contact bridge 20 disconnect, and the first fixed contact 22 and contact bridge 20 are disconnected, and finally makes the circuit disconnection.
To describe in detail according to electric selective automatic switch of the present invention now.
In failure condition, overload current appears between the first link 2 and the second link 4 by the low current shunt circuit, so that coil 56 produces magnetic force by induction at the first armature 62, magnetic force makes the second armature move towards the flange 75 of pin 60 along the power that triggering direction B overcomes spring 66, then pin 60 overcomes the power of spring 66 in its mobile contact 40 of bump, application point place along triggering direction B, so that be connected disconnection between mobile contact 40 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 the first switch 8 and the 3rd switch 16 remain closed.Therefore, the bimetallic 76 of the bimetallic performer of the auxiliary trigger equipment 6 in 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 consists of, and wherein resistance 10 is by the shunt circuit short circuit.Cause the first bimetallic 76 to be heated by the electric current that flows through the first bimetallic 76, therefore be opened through above-mentioned circuit breaker 36 after the very first time interval.In this case, overload current is corresponding to the first threshold electric current, and threshold current can be by electric selective automatic switch with instrument regulation (for example, between the power of the spring force by spring 66 and coil 56 corresponding scale).
Because instantaneous cross of first threshold electric current under very first time interval, be connected again closure between mobile contact 40 and the contact bridge 20, thereby bimetallic 76 had the shunt circuit short circuit of the 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 electric selective automatic switch, the overload current that wherein occurs 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 electric selective automatic switch of main switch work.
In the short circuit current situation, electric selective automatic switch is set to namely substantially in the second short time interval, activate circuit breaker 36 than very first time interval in the very short time.Fig. 3 A and Fig. 3 B illustrate this situation.Because short circuit current is the Second Threshold electric current, near mobile contact 40, by extension 74 contact bridge 20 is moved along triggering direction B, so that 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 the first bimetallic 76, the first switch 8, Limited Current flows to the second link 4 through coils 56.Short circuit current causes the unexpected heating of the first bimetallic 76, and therefore, circuit breaker 36 is activated immediately.In the situation of short interruption, the second armature 64 make the 3rd fixed contact 26 immediately with the contact path
Disconnect, so that 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.In the situation that high short circuit current occurs, the 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 electric selective automatic switch of the present invention.Auxiliary trigger equipment 6 has the bimetallic performer, has the second bimetallic 78 that is positioned at the first bimetallic 76 sides, the triggering that bimetallic 78 is set to be independent of the first bimetallic 76 and causes circuit breaker 36 by the bimetallic performer.The second bimetallic 78 is connected between the second fixed contact 24 and the coil 56.The second bimetallic 78 only is activated under short-circuit conditions or when surpassing the Second Threshold electric current because under the Second Threshold electric current time the second bimetallic 78 and resistance 10 by shunt circuit by 16 short circuits of the 3rd switch.Therefore, the 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 the first bimetallic 76.
The invention provides a kind of electric selective automatic switch, optionally disconnect through this electric selective 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 electric selective automatic switch operation, when short circuit occurring, main switch disconnects being connected between the first link 2 and the second link 4 immediately.Electronic automatic switch according to the present invention has beneficial effect, normally in service, electric current between the first link 2 and the second link 4 substantially only flows through the coil 56 of main trigger equipment 12, because the first bimetallic 76 or the second bimetallic 78 shunt circuit by having second switch 14 and the 3rd switch 16 is by short circuit.Therefore, can make according to the power consumption of electric selective automatic switch of the present invention minimum.In addition, electric selective automatic switch according to the present invention has beneficial effect, and before disconnecting by circuit breaker 36, the continuous current that is used for the auxiliary circuit of control circuit breaker 36 is guaranteed, and avoids thus the operating mistake of auxiliary trigger equipment.
The favourable setting of resistance 10 and coil 56 will be described hereinafter, in conjunction with explaining better its principle of work and power by the automatic fuse of master of simplifying among Fig. 6 and Fig. 7.The setting of selectivity resistance 101 and kicker coil 102 and layout are applicable to be configured to resistance 10 and the coil 56 of coil.
For the current limit of short-circuit conditions, main automatic fuse uses the resistance in 0.5 ohm of scope.
Within 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.The recommendation pottery is as the selectivity resistive element.Except the coil that resistance wire twines, the resistance of the Limited Current that is wound or twines is as the flat rubber belting that is made of 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 current limit 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, in short-term closed and immediately again disconnection 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 that available flux produces greater than the operating current by electromagnet in the magnetic circuit that is produced by limited residual current.Armature makes main contacts guarantee to disconnect within time of delay, until the selectivity bimetallic will be led the circuit breaker release (entklinken) of automatic fuse, this is with interrupt circuit.
Selectivity triggers and kicker coil consists of 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 wire of magnetic flux, is gone back as magnetic screen and heat shielding for contiguous instrument.Yoke is not only carried the selectivity bimetallic, and also box ground is around kicker coil four sides as coil shape selectivity resistance, and being arranged between selectivity resistance and the shell wall of leading automatic fuse of two-sided (beidseitig) spatially.
If it is favourable that the complete selectivity trigger that is co-located at the same side 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 be selected the 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.
Break contact 104 remains closed, so that main contacts 103 is bridged by the parallel circuits that selectivity triggers.
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 strengthens the gravitation of armature 105 in the magnetic circuit of kicker coil by disconnecting main contacts 103, also guarantees the enough braking force of the armature 105 on magnetic core 108 within 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 within 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.The spatial placement of selectivity resistance 101 on kicker coil 102 is apparent, is visible in shell 110 and as the structure for the yoke 107 of the heat shielding of contiguous 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, so that guaranteed enough by the residual current of selectivity resistance limits, so that armature 105 is remained on the magnetic core 108, so that main contacts 103 overcomes on the position that the power of switching-in spring 109 is fixed on disconnection.
Therefore, be that main automatic fuse arranges the selectivity trigger, in selectivity bimetallic and selectivity resistance that series connection arranges, 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 magnetic and supports the disconnection of main contacts 103 and the power effect that remains open.
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 consist of 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 the resistance 10 shown in Fig. 1 to Fig. 5 of the present invention and coil 56.
Claims (18)
1. electric selective automatic switch comprises:
The series connection of-auxiliary trigger equipment (6), logical normally closed the first switch (8), resistance (10) and main trigger equipment (12), described being connected in series between the first electronics link (2) and the second electronics link (4);
-shunt circuit, between described the first electronics link (2) and described the 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 logical normally closed 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 the 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 the Second Threshold electric current greater than described first threshold electric current arrives; And
Described auxiliary trigger equipment (6) is provided so that described the first switch (8) and described the 3rd switch (16) are opened during described second switch (14) is opened behind very first time interval, described the first switch (8) was opened after second time interval during described second switch (14) and described the 3rd switch (16) are opened, and described second time interval is less than described very first time interval.
2. electric selective automatic switch as claimed in claim 1, wherein, described electric current bridge is made of contact bridge (20), lower in working order, described electric current bridge is electrically connected first fixed contact (22) of described the first switch (8) and the 3rd fixed contact (26) of the second fixed contact (24) and described the 3rd switch (16).
3. electric selective automatic switch as claimed in claim 2, wherein, the 3rd fixed contact (26) of a side and first fixed contact (22) of opposite side and the second fixed contact (24) are positioned at the two opposite sides of described contact bridge (20).
4. electric selective automatic switch as claimed in claim 2 or claim 3, wherein, described auxiliary trigger equipment (6) comprises the bimetallic performer, described bimetallic performer comprises the first bimetallic (76) that is positioned between described the first electronics link (2) and described the first switch (8), described bimetallic performer is set to the circuit breaker (36) of mechanism on described contact bridge (20) worked, and the breakaway that is applied to described contact bridge (20) by described circuit breaker (36) acts on the disconnection direction that is connected between described the 3rd fixed contact (26) and the described contact bridge (20), between described the first fixed contact (22) and the described contact bridge (20) and on the disconnection direction that is connected between described the second fixed contact (24) and the described contact bridge (20).
5. electric selective automatic switch as claimed in claim 4, wherein, described bimetallic performer comprises the second bimetallic (78) that is positioned between described the first switch (8) and described the second electronics link (4), and described the second bimetallic (78) can be set to be independent of described the first bimetallic (76) and cause described circuit breaker (36) to be triggered by described bimetallic performer.
6. electric selective automatic switch as claimed in claim 4, wherein, in the layout of the setting of described the first fixed contact (22) and described the second fixed contact (24) and/or described contact bridge (20), at first disconnect with described the second fixed contact (24) and then disconnect with described the first fixed contact (22) when described circuit breaker (36) is disconnected rear described contact bridge (20) in described the 3rd fixed contact (26) when being triggered.
7. electric selective automatic switch as claimed in claim 2, wherein, described main trigger equipment (12) comprises the electromagnetic actuator spare that mechanically acts on described contact bridge (20), described electromagnetic actuator spare comprise the first armature (62) that can be in described performer moves along direction of operating and be positioned at shunt circuit and described the second electronics link (4) between connecting coil (56), described connecting coil (56) is adjusted at the direction of operating (B) of described the first armature (62), and the breakaway that is applied by described the 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 the first fixed contact (22) and described contact bridge (20) and described the second fixed contact (24) and the described contact bridge (20).
8. electric selective automatic switch as claimed in claim 7, wherein, when the breakaway of described the first armature (62) was applied on the described contact bridge (20), the connecting line (X) between described the first fixed contact (22) and described the second fixed contact (24) formed the rotating shaft of described contact bridge (20).
9. such as claim 7 or 8 described electric selective automatic switchs, wherein, the application point of the breakaway that applies of described the first armature (62) is positioned between first fixed contact (22) and the second fixed contact (24) of the 3rd fixed contact (26) of a side and opposite side.
10. such as claim 7 or 8 described electric selective automatic switchs, 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 the first fixed contact (22) and the described contact bridge (20) and between described the 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. electric selective automatic switch as claimed in claim 10, wherein, be positioned at away from described the 3rd fixed contact (26) and exceed described the first fixed contact (22) and contact bridge (20) part of described the second fixed contact (24) on contact spring (34) act on described contact bridge (20).
12. electric selective automatic switch as claimed in claim 7, wherein, described second switch (14) comprises mobile contact (40), and described contact (40) are electrically connected described the first electronics link (2) and described contact bridge (20) under non-failure conditions.
13. electric selective automatic switch as claimed in claim 12, wherein, be disposed in described contact bridge (20) afterwards and arranged rotatably that by whirligig (44) rotating shaft of described whirligig (44) is basic parallel with the rotating shaft (X) of described contact bridge (20) along the mobile contact (40) of the direction of operating (B) of described the first armature (62).
14. electric selective automatic switch as claimed in claim 12, wherein, described electromagnetic actuator spare comprises the pin (60) that extends by the through hole of described contact bridge (20) (72), the direction of operating (B) that described pin (60) has at described the first armature (62) is positioned at the front extension (74) of described contact bridge (20), the front end of the pin of described electromagnetic actuator spare (60) is applicable to the disconnection directive effect of the contact (40) along described movement on described contact (40), and described extension (74) are applicable to disconnection directive effect along described contact bridge (20) on described contact bridge (20).
15. such as claim 7 or 8 described electric selective automatic switchs, wherein, described electromagnetic actuator spare is set in service at described the first armature (62), so that before being disconnected being connected between described the 3rd fixed contact (26) and described contact bridge (20), being connected between the contact (40) of described contact bridge (20) and described movement is disconnected.
16. such as claim 7 or 8 described electric selective automatic switchs, wherein, described electromagnetic actuator spare comprises core (58), described core (58) is provided with the short-circuited conducting sleeve (70) towards described the first armature (62).
17. such as claim 7 or 8 described electric selective automatic switchs, wherein, described electromagnetic actuator spare comprises can be along mobile the second armature (64) of described direction of operating (B), the quality of described the second armature (64) is greater than described the first armature (62), and the induction of the increase by being additional to described the first armature (62) in described electromagnetic actuator spare causes the accelerated motion of described the first armature (62) on described direction of operating (B).
18. such as each described electric selective automatic switch in the claim 1,2,7 or 8, wherein, when described auxiliary trigger equipment is set to manually connect, at first closed described second switch (14), then last closed described the 3rd switch (16) of closed described the first switch (8).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1020080268135 | 2008-06-05 | ||
| DE102008026813.5 | 2008-06-05 | ||
| DE102008026813.5A DE102008026813B4 (en) | 2008-06-05 | 2008-06-05 | Electric selective auto switch |
| PCT/EP2009/003968 WO2009146900A1 (en) | 2008-06-05 | 2009-06-03 | Electric selective automatic switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102047370A CN102047370A (en) | 2011-05-04 |
| CN102047370B true CN102047370B (en) | 2013-10-30 |
Family
ID=40982289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980119632.7A Expired - Fee Related 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) |
Families Citing this family (4)
| 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 |
| EP3048629A1 (en) * | 2015-01-23 | 2016-07-27 | Jozef Smrkolj | Automatic cut-out |
| FR3075458B1 (en) * | 2017-12-14 | 2020-09-11 | Schneider Electric Ind Sas | ELECTRICAL DEVICE INTENDED TO ESTABLISH OR INTERRUPT THE CURRENT IN AN ELECTRIC CIRCUIT |
| 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 |
| CN1108426A (en) * | 1993-12-24 | 1995-09-13 | 施内德电气公司 | Electric switch device with separable contacts |
| DE4118377C2 (en) * | 1991-06-05 | 1999-03-04 | Hager Electro Gmbh | Line and / or device circuit breaker |
| 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 not_active Not-in-force
- 2009-06-03 WO PCT/EP2009/003968 patent/WO2009146900A1/en active Application Filing
- 2009-06-03 CN CN200980119632.7A patent/CN102047370B/en not_active Expired - Fee Related
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 |
| DE4118377C2 (en) * | 1991-06-05 | 1999-03-04 | Hager Electro Gmbh | Line and / or device circuit breaker |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102008026813A1 (en) | 2009-12-10 |
| DE102008026813B4 (en) | 2016-11-17 |
| CN102047370A (en) | 2011-05-04 |
| EP2286432A1 (en) | 2011-02-23 |
| EP2286432B1 (en) | 2016-04-13 |
| WO2009146900A1 (en) | 2009-12-10 |
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