CN103871797B - Circuit-breaker and electromagnetic trip device thereof - Google Patents
Circuit-breaker and electromagnetic trip device thereof Download PDFInfo
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- CN103871797B CN103871797B CN201310334829.0A CN201310334829A CN103871797B CN 103871797 B CN103871797 B CN 103871797B CN 201310334829 A CN201310334829 A CN 201310334829A CN 103871797 B CN103871797 B CN 103871797B
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Abstract
The invention provides a kind of circuit-breaker and electromagnetic trip device thereof, the kind of spring and solenoid can be suppressed, and just can change instantaneous tripping current value without the need to the tripping operation stroke changing movable core.This circuit-breaker has electromagnetic trip device, if flow through the electric current of prescribed level in solenoid, then movable core is subject to fixed iron core attraction by electromagnetic attraction, attracted to after on fixed iron core at movable core, by making movable contact be separated with fixed contact therefor by open-close mechanism section, thus circuit-breaker carries out tripping action, in this circuit-breaker, being provided with between movable core (35) and fixed iron core (33) can along electromagnetic attraction setting auxiliary iron core (36) attracting direction movement, by regulating the position of electromagnetic attraction setting auxiliary iron core (36) on attraction direction, thus be set as multiple tripping characteristic.
Description
Technical field
The present invention relates to a kind of circuit-breaker and electromagnetic trip device thereof, this circuit-breaker has electromagnetic trip device, this electromagnetic trip device has the solenoid be connected in series with movable contact and fixed contact therefor between power supply side terminal and load side terminal, and the fixed iron core be configured in the magnetic circuit of this solenoid and movable core, if flow through the electric current of prescribed level in described solenoid, then described movable core is subject to the attraction of described fixed iron core by electromagnetic attraction, attracted to after on described fixed iron core at described movable core, be separated with described fixed contact therefor by being made described movable contact by open-close mechanism section, thus circuit-breaker carries out tripping action.
Background technology
Circuit-breaker not only has switching function, the operation of handle that namely had by circuit-breaker and make circuit ON/disconnection, and there is following important function, that is, in order to prevent circuit breaker electric wire or load equipment scaling loss in advance when flowing through overcurrent.
The electromagnetic trip device with instantaneous tripping characteristic has: solenoid; Fixed iron core, it is inner that it is arranged on this solenoid; And movable core, it is inner that it is arranged on above-mentioned solenoid, by spring to the direction pretension away from fixed iron core, by with big current such as short circuit currents to magnetic excitation coil, thus make movable core overcome the pretightning force of spring and unshakable in one's determination attraction that be fixed.Thus, made open-close mechanism section action by moving of this movable core, carry out circuit breaker.
In order to emphasize that short time that other equipment are such as positioned at the fuse of circuit-breaker upstream allows characteristic and is positioned at the starting current characteristic of motor in downstream, and the value (being designated as below " instantaneous tripping current value ") of the instantaneous tripping electric current of the benchmark as instantaneous tripping characteristic must be set subtly.
Such as, at IEC(InternationalElectrotechnicalCommission, international standard) in 60898, instantaneous tripping current value is set as exceeding 3 times of rated current respectively and is less than or equal to 5 times (B characteristics), is less than or equal to 10 times (C characteristics) and is less than or equal to 20 times (D characteristics) more than 10 times more than 5 times.
In the electromagnetic trip device of existing circuit-breaker, when being provided with spring, the amount of movement at the interval between movable core and fixed iron core, i.e. movable core and this move required power (gravitation) and be determined.
If the kind of instantaneous tripping current value will be increased according to the requirement of above-mentioned standard, then must prepare the spring of multiple load, in addition, the coil of the multiple number of turn must be prepared, because the kind of the parts such as spring, solenoid increases, the management therefore existed for above-mentioned parts also becomes loaded down with trivial details problem, in addition, from the angle of part standard and cost degradation, also exist and be difficult to the problem realizing standardization and cost degradation.
Therefore, disclose following technology, that is, in existing circuit-breaker, have control unit, the pretightning force of this control unit to the distance between movable core and fixed iron core or the spring between movable core and fixed iron core controls (such as with reference to patent documentation 1).
Patent documentation 1: Japanese Unexamined Patent Publication 2007-103123 publication
But, in above-mentioned control unit, because movable core can change the tripping operation stroke for making the open-close mechanism section of circuit-breaker carry out trip operation, when causing open-close mechanism section action can the change such as momentum or tripping operation surplus, therefore cannot easily carry out dispatching from the factory checks and management that goods fluctuate.In addition, due to gravitation adjustment can not be carried out after tripgear has been assembled, therefore, the effect of the simplification reaching standardization and manufacturing process is only limitted at the most.
Summary of the invention
The present invention proposes to solve above-mentioned problem, its object is to, can suppress the kind of spring and solenoid, and, instantaneous tripping current value can be changed and do not change the tripping operation stroke of movable core.
Circuit-breaker involved in the present invention has electromagnetic trip device, and this electromagnetic trip device has: solenoid, and it is connected in series with movable contact and fixed contact therefor between power supply side terminal and load side terminal, and fixed iron core and movable core, they are configured in the magnetic circuit of this solenoid, if flow through the electric current of prescribed level in described solenoid, then described movable core is subject to the attraction of described fixed iron core by electromagnetic attraction, attracted to after on described fixed iron core at described movable core, be separated with described fixed contact therefor by being made described movable contact by open-close mechanism section, thus circuit-breaker carries out tripping action, in this circuit-breaker, being provided with between described movable core and described fixed iron core can along the electromagnetic attraction setting auxiliary iron core of the direction movement of described attraction, regulate by setting the position of auxiliary iron core on the direction of described attraction by position adjusting mechanism to described electromagnetic attraction, thus be set as multiple tripping characteristic.
In addition, electromagnetic trip device involved in the present invention has: solenoid, is connected in series between the load side terminal of its power supply side terminal at circuit-breaker and described circuit-breaker with the movable contact of described circuit-breaker and the fixed contact therefor of described circuit-breaker; And fixed iron core and movable core, they are configured in the magnetic circuit of this solenoid, if flow through the electric current of prescribed level in described solenoid, then described movable core is subject to the attraction of described fixed iron core by electromagnetic attraction, in this electromagnetic trip device, be provided with between described movable core and described fixed iron core and along the electromagnetic attraction setting auxiliary iron core of the direction movement of described attraction, by position adjusting mechanism, the position of auxiliary iron core on the direction of described attraction can be set to described electromagnetic attraction and regulate.
The effect of invention
Circuit-breaker involved in the present invention has electromagnetic trip device, and this electromagnetic trip device has: solenoid, and it is connected in series with movable contact and fixed contact therefor between power supply side terminal and load side terminal, and fixed iron core and movable core, they are configured in the magnetic circuit of this solenoid, if flow through the electric current of prescribed level in described solenoid, then described movable core is subject to the attraction of described fixed iron core by electromagnetic attraction, attracted to after on described fixed iron core at described movable core, be separated with described fixed contact therefor by being made described movable contact by open-close mechanism section, thus circuit-breaker carries out tripping action, in this circuit-breaker, being provided with between described movable core and described fixed iron core can along the electromagnetic attraction setting auxiliary iron core of the direction movement of described attraction, regulate by setting the position of auxiliary iron core on the direction of described attraction by position adjusting mechanism to described electromagnetic attraction, thus be set as multiple tripping characteristic, in addition, electromagnetic trip device involved in the present invention has: solenoid, be connected in series with the movable contact of described circuit-breaker and the fixed contact therefor of described circuit-breaker between the load side terminal of its power supply side terminal at circuit-breaker and described circuit-breaker, and fixed iron core and movable core, they are configured in the magnetic circuit of this solenoid, if flow through the electric current of prescribed level in described solenoid, then described movable core is subject to the attraction of described fixed iron core by electromagnetic attraction, in this electromagnetic trip device, being provided with between described movable core and described fixed iron core can along the electromagnetic attraction setting auxiliary iron core of the direction movement of described attraction, set the position of auxiliary iron core on the direction of described attraction by position adjusting mechanism to described electromagnetic attraction to regulate, therefore, the present invention has the kind that can suppress spring and solenoid, and instantaneous tripping current value can be changed and do not change the effect of the tripping operation stroke of movable core.
Accompanying drawing explanation
Fig. 1 is the figure representing embodiments of the present invention 1, is the integrally-built figure of the example that circuit-breaker is shown with longitudinal cross-sectional side view.
Fig. 2 is the figure representing embodiments of the present invention 1, is the figure of the example that the electromagnetic trip device of circuit-breaker is shown with oblique view.
Fig. 3 is the figure representing embodiments of the present invention 1, is the figure of the example that the electromagnetic trip device of circuit-breaker is shown with longitudinal cross-sectional side view.
Fig. 4 is the figure representing embodiments of the present invention 1, is the figure of the example that the electromagnetic trip device of circuit-breaker is shown with vertical view.
Fig. 5 is the figure representing embodiments of the present invention 1, is the figure of the example illustrating the electromagnetic trip device of circuit-breaker with cross-sectional top.
Fig. 6 is the figure representing embodiments of the present invention 1, is the figure of the example that the attraction state of the electromagnetic trip device of circuit-breaker is shown with longitudinal cross-sectional side view.
Fig. 7 is the figure representing embodiments of the present invention 1, is to illustrate that the position adjustments electromagnetic attraction of the electromagnetic trip device of circuit-breaker being set auxiliary iron core is the figure of an example of the state moving to other position attracting direction with longitudinal cross-sectional side view.
Fig. 8 is the figure representing embodiments of the present invention 2, is the figure of other example that the electromagnetic trip device of circuit-breaker is shown with longitudinal cross-sectional side view.
Fig. 9 is the figure representing embodiments of the present invention 3, is the figure of another example that the electromagnetic trip device of circuit-breaker is shown with longitudinal cross-sectional side view.
Embodiment
Execution mode 1
Below, based on Fig. 1 to Fig. 7, embodiments of the present invention 1 are described.Fig. 1 is the integrally-built figure of the example that circuit-breaker is shown with longitudinal cross-sectional side view, Fig. 2 is the figure of the example that the tripgear of circuit-breaker is shown with oblique view, Fig. 3 is the figure of the example that the tripgear of circuit-breaker is shown with longitudinal cross-sectional side view, Fig. 4 is the figure of the example that the tripgear of circuit-breaker is shown with vertical view, Fig. 5 is the figure of the example illustrating the tripgear of circuit-breaker with cross-sectional top, Fig. 6 is the figure of the example that the attraction state of the tripgear of circuit-breaker is shown with longitudinal cross-sectional side view, with longitudinal cross-sectional side view, Fig. 7 illustrates that the position adjustments electromagnetic attraction of the tripgear of circuit-breaker being set auxiliary iron core is the figure of an example of the state moving to other positions attracting direction.
In Fig. 1 to Fig. 5, circuit-breaker 111 has pedestal 1, housing 2, power supply side terminal 3a, load side terminal 3b, movable piece support 4, construction bolt (electromagnetic trip device construction bolt) 5, trip(ping) bar 6, movable piece 7, movable contact 8a, fixed contact therefor 8b, explosion chamber 9, switch knob 10, open-close mechanism section 11 and electromagnetic trip device 21.
Pedestal 1 and housing 2 are formed by synthetic resin material, the housing of forming circuit circuit breaker 111.
Construction bolt (electromagnetic trip device construction bolt) 5 is arranged on the fixed iron core 33 of electromagnetic trip device 21 by running through movable piece support 4 and screwing togather, thus make electromagnetic trip device 21 and movable piece support 4 machinery and be electrically connected, therefore, by this connection, electromagnetic trip device 21 is arranged on pedestal 1 via movable piece support 4.
Open-close mechanism section 11 has trip(ping) bar 6, if by the attraction action of the electromagnetic trip device 21 when the super-high-current such as short circuit current or overcurrent flows through circuit, and driven by action movie 38 pairs of trip(ping) bars 6 of electromagnetic trip device 21, then the movable contact 8a of movable piece 7 leading section is driven on the direction away from fixed contact therefor 8b by movable piece 7, as shown in Figure 1, movable contact 8a becomes the state be separated completely with fixed contact therefor 8b.When movable contact 8a is separated with fixed contact therefor 8b, the electric arc occurred between movable contact 8a and fixed contact therefor 8b is arc extinguishing in explosion chamber 9.
In addition, by carrying out manual operation to switch knob 10, also movable contact 8a can be separated with fixed contact therefor 8b via open-close mechanism section 11.
Below, the detailed construction of electromagnetic trip device 21 and the function of each several part are described.
Electromagnetic trip device 21 has: solenoid 31; Cylindric solenoid shaft 32; Solenoid shaft inner circumferential lug boss 32a; Solenoid shaft upper end upper bottom portion 32b; The movable core first neck bullport 32ba of solenoid shaft upper end upper bottom portion; Fixed iron core 33; Fixed iron core upper surface part magnetic opposite face 33a; Fixed iron core Upper cylindrical shape pressing spring supporting portion 33b; Fixed iron core upper end pressing spring-loaded has bottom outlet 33ba; Yoke 34; Yoke vertical component effect 34a; Yoke holding section 34ba, 34bb; Movable core 35; Movable core head 35a; Movable core head upper surface groove portion 35aa; Movable core first neck 35b; Movable core second neck 35c; Movable core solenoid shaft inward flange shape sliding part 35d; Movable core lower end external thread part 35e; Movable core lower end pressing spring-loaded has bottom outlet 35f; Movable core lower surface portion magnetic opposite face 35g; Cylindric auxiliary movable core (electromagnetic attraction setting auxiliary iron core) 36; Cylindric auxiliary movable core inner circumferential internal thread part 36a; Cylindric auxiliary movable core peripheral recess 36b; Cylindric auxiliary movable core lower surface portion magnetic opposite face 36c; Coiled type presses pressing spring 37; Action movie 38; Action movie driven part 38a; Action movie driven part movable core head holding section 38aa; The corresponding opening portion 38ab of action movie driven part movable core head; And action movie driven part movable core second neck through hole 38ac.
Solenoid 31 is wound on the periphery of cylindric solenoid shaft 32, the end of its mains side is electrically connected with power supply side terminal 3a via bonding conductor 313 flexible between solenoid power supply side terminal, the end of load-side, via the movable contact 8a of on-state and fixed contact therefor 8b, is electrically connected with load side terminal 3b.
Thus, as solenoid 31, when movable contact 8a and fixed contact therefor 8b is in on-state, flow through circuital current and load current, and when movable contact 8a and fixed contact therefor 8b are in released state (circuit breaker trip state and the artificial state be separated based on super-high-current), do not flow through circuital current.
In the inner circumferential of cylindric solenoid shaft 32, solenoid shaft inner circumferential lug boss 32a and cylindric solenoid shaft 32 form.Solenoid shaft inner circumferential lug boss 32a is formed as, and at least extends in the moving range that cylindrical shape assists movable core (electromagnetic attraction setting auxiliary iron core) 36.
Movable core first neck bullport 32ba is formed at the central part of solenoid shaft upper end upper bottom portion 32b.
On columned fixed iron core 33, around fixed iron core Upper cylindrical shape pressing spring supporting portion 33b, be formed with fixed iron core upper surface part magnetic opposite face 33a.
Fixed iron core Upper cylindrical shape pressing spring supporting portion 33b and fixed iron core 33 protrude the upper end side (movable core 35 side) of the central part being arranged on fixed iron core 33 integratedly, are formed as same heart shaped with solenoid 31, cylindric solenoid shaft 32 and movable core 35.
In addition, in the upper end side (movable core 35 side) of fixed iron core Upper cylindrical shape pressing spring supporting portion 33b, offer fixed iron core upper end pressing spring-loaded and have bottom outlet 33ba, this fixed iron core upper end pressing spring-loaded has bottom outlet 33ba and fixed iron core Upper cylindrical shape to press spring supporting portion 33b, solenoid 31, cylindric solenoid shaft 32 and movable core 35 to be formed as same heart shaped.
Yoke 34 has yoke vertical component effect 34a and yoke holding section 34ba, 34bb of formation integral with one another.
The yoke holding section 34ba of the bottom (with the counterpart of fixed iron core 33) of yoke vertical component effect 34a engages with fixed iron core 33, with fixed iron core 33 magnetic coupling.
The yoke holding section 34bb of the upper end (with the counterpart of the movable core first neck 35b of movable core 33) of yoke vertical component effect 34a engages with solenoid shaft upper end upper bottom portion 32b.
Movable core 35 has movable core head 35a, movable core head upper surface groove portion 35aa, movable core first neck 35b, movable core second neck 35c, movable core solenoid shaft inward flange shape sliding part 35d, movable core lower end external thread part 35e integratedly, movable core lower end presses spring-loaded bottom outlet 35f and movable core lower surface portion magnetic opposite face 35g, the shape of movable core 35 entirety forms roughly gyroscope-like, can rotate around the center of solenoid 31.
Movable core head 35a, movable core head upper surface groove portion 35aa, movable core first neck 35b, movable core second neck 35c, movable core solenoid shaft inward flange shape sliding part 35d, movable core lower end external thread part 35e and movable core lower end pressing spring-loaded have bottom outlet 35f and fixed iron core 33, solenoid 31 and cylindric solenoid shaft 32 to be formed as same heart shaped.
Movable core solenoid shaft inward flange shape sliding part 35d, can be entrenched in the inner circumferential of solenoid shaft slidably on above-below direction (fixed iron core 33 assists movable core (electromagnetic attraction setting auxiliary iron core) 36 directions attracted to cylindrical shape).
In the upside (that side contrary to fixed iron core 33) of movable core solenoid shaft inward flange shape sliding part 35d, be integrally formed with movable core first neck 35b with movable core solenoid shaft inward flange shape sliding part 35d, this movable core first neck 35b can run through solenoid shaft upper end upper bottom portion 32b movably movable core first neck bullport 32ba along described attraction direction is inner.
In the upside (that side contrary to fixed iron core 33) of movable core first neck 35b, be integrally formed with movable core second neck 35c with movable core first neck 35b, the action movie driven part movable core second neck through hole 38ac of this movable core second neck 35c penetrating action sheet 38 is movably inner.
In the upside (that side contrary to fixed iron core 33) of movable core second neck 35c, be integrally formed with movable core head 35a with movable core second neck 35c, the surface of the upside (that side contrary to fixed iron core 33) of this movable core head 35a is formed with movable core head upper surface groove portion 35aa.
As movable core head 35a and movable core head upper surface groove portion 35aa thereof, their top (that side contrary to fixed iron core 33) is not covered by action movie driven part 38a, but is opened by the corresponding opening portion 38ab of the action movie driven part movable core head of action movie driven part 38a.
As movable core head 35a and movable core head upper surface groove portion 35aa thereof, their top (that side contrary to fixed iron core 33) is not covered by action movie driven part 38a but open, therefore, if the instruments such as screwdriver insert from this open part from top, chimeric with movable core head upper surface groove portion 35aa, and around solenoid 31 center and such as rotate clockwise, then movable core 35 around solenoid 31 center and rotate clockwise, if rotated counterclockwise on the contrary, then movable core 35 around solenoid 31 center and rotate counterclockwise.
Cylindric auxiliary movable core (electromagnetic attraction setting auxiliary iron core) 36 has cylindric auxiliary movable core inner circumferential internal thread part 36a, cylindric auxiliary movable core peripheral recess 36b and cylindric auxiliary movable core lower surface portion magnetic opposite face 36c.
Cylindric auxiliary movable core inner circumferential internal thread part 36a is arranged on the internal thread part on the inner peripheral surface of cylindric auxiliary movable core (electromagnetic attraction setting auxiliary iron core) 36, screws togather with the movable core lower end external thread part 35e of movable core 35.
Cylindric auxiliary movable core peripheral recess 36b is formed in the recess on the outer peripheral face of cylindric auxiliary movable core (electromagnetic attraction setting auxiliary iron core) 36, on the auxiliary movable core peripheral recess 36b of this cylindrical shape, engaging has solenoid shaft inner circumferential lug boss 32a, by the auxiliary engaging between movable core peripheral recess 36b with solenoid shaft inner circumferential lug boss 32a of this cylindrical shape, because solenoid shaft inner circumferential lug boss 32a is fixing, therefore, cylindric auxiliary movable core (electromagnetic attraction setting auxiliary iron core) 36 can not rotate around the center of solenoid 31.
Because cylindrical shape assists movable core (electromagnetic attraction setting auxiliary iron core) 36 can not rotate around the center of solenoid 31, therefore, if movable core 35 such as rotates clockwise around the center of solenoid 31, then cylindric auxiliary movable core 36 (to that side contrary to fixed iron core 33) movement upward, if movable core 35 such as rotates counterclockwise around the center of solenoid 31, then cylindric auxiliary movable core 36 (to fixed iron core 33 side) movement downwards.
The fixed iron core upper end pressing spring-loaded that coiled type is embedded in fixed iron core 33 by one end of pressing spring 37 has in bottom outlet 33ba, and the movable core lower end pressing spring-loaded that the other end is embedded in movable core 35 has in bottom outlet 35f.Thus, assist movable core (electromagnetic attraction setting auxiliary iron core) 36 to be fixed by cylindrical shape unshakable in one's determination 33 to attract and direction towards fixed iron core 33 is moved, movable core 35 and cylindrical shape are assisted together with movable core (electromagnetic attraction setting auxiliary iron core) 36 and are moved towards the direction of fixed iron core 33, thus coiled type is compressed by pressing spring 37, if fixed iron core 33 assists the attraction of movable core (electromagnetic attraction setting auxiliary iron core) 36 to be removed to cylindrical shape, then by by the coiled type that compresses by the release force of pressing spring 37 to the recovering state before described attraction, movable core 35 and cylindric auxiliary movable core (electromagnetic attraction setting auxiliary iron core) 36 return to the state before described attraction.
Below, be described for action.
In circuit-breaker 111 shown in Figure 1, when normal power-up, to the main circuit of load, the state of overcurrent is being there is not (namely from power supply, between power supply side terminal 3a and load side terminal 3b, the electric current flow through via solenoid 31, movable piece 7, movable contact 8a and fixed contact therefor 8b is the state of steady-state current instead of overcurrent) under, keep the on-state that movable contact 8a contacts with fixed contact therefor 8b.
In main circuit, the situation of the big current such as short circuit current flow (namely, between power supply side terminal 3a and load side terminal 3b, via solenoid 31, movable piece 7, movable contact 8a, and the electric current that flows through of fixed contact therefor 8b is the situation of the big current such as short circuit current) under, this big current flows through solenoid 31, solenoid 31 excitation is made due to this electric current, by the magnetic flux that solenoid 31 produces, and at movable core 35, cylindric auxiliary movable core (electromagnetic attraction setting auxiliary iron core) 36, fixed iron core 33 produces the electromagnetic force of the above-below direction along Fig. 1.
If the electromagnetic force be applied on cylindric auxiliary movable core (electromagnetic attraction setting auxiliary iron core) 36 and movable core 35 exceedes the pretightning force of coiled type by pressing spring 37, then as shown in Figure 6, cylindric auxiliary movable core (electromagnetic attraction setting auxiliary iron core) 36 and movable core 35 are attracted to the fixed iron core upper surface part magnetic opposite face 33a of fixed iron core 33 upper surface of solenoid 31 inside.If cylindric auxiliary movable core (electromagnetic attraction setting auxiliary iron core) 36 and movable core 35 attracted on fixed iron core 33, then link with the action of the movable core 35 caused by this attraction, the action movie 38 pairs of trip(ping) bars 6 carrying out rotating centered by pivot 38c press, open-close mechanism section 11 action, makes circuit-breaker 111 trip.
Here, due to the gravitation between the iron core that attracts each other and this iron core 33, 2 powers of the magnetic gap between 36 change pro rata, therefore, such as shown in Fig. 3, when movable core solenoid shaft inward flange shape sliding part 35d and cylindrical shape assist the primary clearance length Ln between movable core (electromagnetic attraction setting auxiliary iron core) 36 to be the state of L1, there are 3 times to the instantaneous tripping characteristic of rated current, when described Ln is the state of L2 as shown in Figure 7, there are 10 times to the instantaneous tripping characteristic of rated current, even if above-mentioned instantaneous tripping characteristic also can be realized when using identical parts.In addition, by the movable core head upper surface groove portion 35aa of the screwdriver of the upper surface of the movable core head 35a on movable core 35 top, after electromagnetic trip device 21 assembling terminates, also the instruments such as screwdriver can be used to regulate described primary clearance length Ln, that is, arbitrary instantaneous tripping characteristic can be set.
According to the present embodiment 1, by being predetermined distance by the magnetic gap cut to lengthen between the fixed iron core 33 of solenoid 31 inside and auxiliary movable core (electromagnetic attraction setting auxiliary iron core) 36, thus can control gravitation, therefore, it is possible to change instantaneous tripping current value, and without the need to changing by pressing spring 37 or solenoid 31 coiled type, the tripping operation stroke of movable core can not be changed.
In addition, due to without the need to changing by pressing spring 37 or solenoid 31 coiled type, the tripping operation stroke of movable core can not be changed, just can change instantaneous tripping current value, comprise the manufacturing process of coiled type by the identification management of pressing spring 37 and solenoid 31 therefore, it is possible to simplify, realize standardization and cost degradation.
In addition, even if after the assembling of electromagnetic trip device 21 completes, also can regulate trip current value by using the instruments such as screwdriver to make the top of movable core 35 rotate, therefore, even if instantaneous tripping current value in inspection drops on outside benchmark dispatching from the factory, also can be modified to qualified product, realize the raising of rate of finished products.
As mentioned above, the circuit-breaker of present embodiment 1 has electromagnetic trip device, and this electromagnetic trip device has: solenoid, and it is connected in series with movable contact and fixed contact therefor between power supply side terminal and load side terminal, and fixed iron core and movable core, they are configured in the magnetic circuit of this solenoid, if flow through the electric current of prescribed level in described solenoid, then described movable core is subject to the attraction of described fixed iron core by electromagnetic attraction, attracted to after on described movable core at described movable core, be separated with described fixed contact therefor by being made described movable contact by open-close mechanism section, thus circuit-breaker carries out tripping action, in this circuit-breaker, being provided with between described movable core and described fixed iron core can along the electromagnetic attraction setting auxiliary iron core of the direction movement of described attraction, regulate by setting the position of auxiliary iron core on the direction of described attraction by position adjusting mechanism to described electromagnetic attraction, thus be set as multiple tripping characteristic.
In addition, as mentioned above, the electromagnetic trip device of present embodiment 1 has: solenoid, is connected in series between the load side terminal of its power supply side terminal at circuit-breaker and described circuit-breaker with the movable contact of described circuit-breaker and the fixed contact therefor of described circuit-breaker; And fixed iron core and movable core, they are configured in the magnetic circuit of this solenoid, if flow through the electric current of prescribed level in described solenoid, then described movable core is subject to the attraction of described fixed iron core by electromagnetic attraction, in this electromagnetic trip device, be provided with between described movable core and described fixed iron core and along the electromagnetic attraction setting auxiliary iron core of the direction movement of described attraction, by position adjusting mechanism, the position of auxiliary iron core on the direction of described attraction can be set to described electromagnetic attraction and regulate.
In addition, as mentioned above, in the circuit-breaker and electromagnetic trip device thereof of present embodiment 1, described electromagnetic attraction setting auxiliary iron core is being arranged on described movable core along the mode of described attraction direction movement, in addition, described fixed iron core responsible carries out the magnetic opposite face of described attraction and the responsible of described electromagnetic attraction setting auxiliary iron core, and to carry out the magnetic opposite face of described attraction parallel to each other, and the described magnetic opposite face of the described magnetic opposite face of described fixed iron core and described electromagnetic attraction setting auxiliary iron core is all orthogonal with described attraction direction.
In addition, as mentioned above, in the circuit-breaker and electromagnetic trip device thereof of present embodiment 1, described electromagnetic attraction setting auxiliary iron core is arranged on described movable core can screw togather along the mode of described attraction direction movement, in addition, described electromagnetic attraction setting auxiliary iron core is formed with internal thread part, described movable core is formed the external thread part that the described internal thread part that sets auxiliary iron core with described electromagnetic attraction screws togather, described movable core can rotate around the center of described solenoid, and described electromagnetic attraction setting auxiliary iron core can not rotate around the center of described solenoid, rotate around the center of described solenoid by making described movable core, thus the described electromagnetic attraction setting position of auxiliary iron core on described attraction direction is regulated.
Execution mode 2
Below, use Fig. 8, embodiments of the present invention 2 are described.Fig. 8 is the figure of other examples that the electromagnetic trip device of circuit-breaker is shown with longitudinal cross-sectional side view.
In present embodiment 2, as shown in Figure 8, in the inside of the solenoid 31 of winding, be inserted with roughly cylindric solenoid shaft 32 actively, one end of downside in the figure of solenoid shaft 32, to loosen the fixed iron core 33 that chimeric mode is provided with circular cone shape.From another perspective, the responsible magnetic opposite face 36c carrying out described attraction that fixed iron core 33 responsible carries out that the magnetic opposite face 33a of described attraction and cylindrical shape assist movable core (electromagnetic attraction setting auxiliary iron core) 36 is parallel to each other, and the described magnetic opposite face 36c of the described magnetic opposite face 33a of described fixed iron core and described electromagnetic attraction setting auxiliary iron core 36 all tilts relative to described attraction direction.Structure beyond said structure and function identical with described execution mode 1, therefore the description thereof will be omitted.
In present embodiment 2; the magnetic opposite face 36c of electromagnetic attraction setting auxiliary iron core 36 is formed as the shape of the responsible magnetic opposite face 33a carrying out attracting along fixed iron core 33; because magnetic relative area increases; therefore, low momentary type circuit-breaker semiconductor device being carried out to overcurrent protection etc. that instantaneous tripping current value compared with common circuit-breaker sets lower is also applicable to.
Execution mode 3
Below, use Fig. 9, embodiments of the present invention 3 are described.Fig. 9 is the figure of another example that the electromagnetic trip device of circuit-breaker is shown with longitudinal cross-sectional side view.
In present embodiment 3, as shown in Figure 9, illustrate that be provided with in fixed iron core 33 side can dynamic auxiliary fixed iron core (electromagnetic attraction setting auxiliary iron core) 39, and be provided with can the example of dynamic auxiliary fixed iron core position adjustments part 40.
Can dynamic auxiliary fixed iron core (electromagnetic attraction setting auxiliary iron core) 39 have can dynamic auxiliary fixed iron core upper end flange shape sliding part 39a, can the magnetic opposite face 39aa of upper surface part of dynamic auxiliary fixed iron core upper end flange shape sliding part 39a, can the bullport 39ab of pressing spring supporting portion 33b of dynamic auxiliary fixed iron core upper end flange shape sliding part 39a, can the cylindric sliding part 39b of lower end of dynamic auxiliary fixed iron core 39, can the tooth-strip part 39ba of lower end cylinder shape sliding part 39b of dynamic auxiliary fixed iron core 39, and can dynamic auxiliary fixed iron core lower end cylinder shape sliding part guide annular aperture 39c.
Can dynamic auxiliary fixed iron core position adjustments part 40 have can dynamic auxiliary fixed iron core position adjustments part the inner pinion part 40a and can the adjustment grip part 40b of dynamic auxiliary fixed iron core position adjustments part outer end.In addition, can dynamic auxiliary fixed iron core position adjustments part 40 be inserted into the sidewall bottom place being arranged on fixed iron core 33 can in dynamic auxiliary fixed iron core position adjustments part patchhole 33c.
If make the adjustment grip part 40b of dynamic auxiliary fixed iron core position adjustments part outer end to rotate, then pinion part 40a rotates, accompany with this rotation, the tooth-strip part 39ba engaged with pinion part 40a along the vertical direction (described attraction direction) is mobile, with tooth-strip part 39ba one can dynamic auxiliary fixed iron core (electromagnetic attraction setting auxiliary iron core) also along the vertical direction (described attraction direction) mobile.
Thus, identically with described execution mode 1, without the need to changing by pressing spring 37 or solenoid 31 coiled type, the tripping operation stroke of movable core can not be changed, just can change instantaneous tripping current value.
Structure beyond said structure and function identical with described execution mode 1, therefore the description thereof will be omitted.
In addition; in present embodiment 3; identically with described execution mode 2; if the described magnetic opposite face of the described magnetic opposite face and described electromagnetic attraction setting auxiliary iron core that are formed as described movable core is all relative to the structure that described attraction direction tilts; then identically with described execution mode 2; magnetic relative area increases, and is also applicable to low momentary type circuit-breaker semiconductor device being carried out to overcurrent protection etc. that instantaneous tripping current value compared with common circuit-breaker sets lower.
In addition, in each figure of Fig. 1 to Fig. 8, identical label represents same or equivalent part.
In addition, within the scope of the invention, can each execution mode suitably be changed, be omitted.
The explanation of label
1 pedestal, 2 housings, 3a power supply side terminal, 3b load side terminal,
4 movable piece supports, 5 construction bolts (electromagnetic trip device construction bolt),
6 trip(ping) bars, 7 movable pieces, 8a movable contact, 8b fixed contact therefor,
9 explosion chambers, 10 switch knobs, 11 open-close mechanism sections,
111 circuit-breakers, 21 electromagnetic trip devices, 31 solenoids,
Flexible bonding conductor between 313 solenoid power supply side terminals,
32 cylindric solenoid shaft, 32a solenoid shaft inner circumferential lug boss,
32b solenoid shaft upper end upper bottom portion,
The movable core first neck bullport of 32ba solenoid shaft upper end upper bottom portion,
33 fixed iron cores, 33a fixed iron core upper surface part magnetic opposite face,
33b fixed iron core Upper cylindrical shape pressing spring supporting portion,
33ba fixed iron core upper end pressing spring-loaded have bottom outlet,
33c can dynamic auxiliary fixed iron core position adjustments part patchhole,
34 yokes, 34a yoke vertical component effect, 34b yoke holding section,
35 movable cores, 35a movable core head, 35aa movable core head upper surface groove portion, 35b movable core first neck, 35c movable core second neck,
35d movable core solenoid shaft inward flange shape sliding part, 35e movable core lower end external thread part,
35f movable core lower end pressing spring-loaded have bottom outlet,
35g movable core lower surface portion magnetic opposite face,
36 cylindric auxiliary movable cores (electromagnetic attraction setting auxiliary iron core),
The auxiliary movable core inner circumferential internal thread part of 36a cylindrical shape, the auxiliary movable core peripheral recess of 36b cylindrical shape,
The auxiliary movable core lower surface portion magnetic opposite face of 36c cylindrical shape,
37 coiled types press pressing spring, 38 action movies, 38a action movie driven part,
38aa action movie driven part movable core head holding section,
The corresponding opening portion of 38ab action movie driven part movable core head,
38ac action movie driven part movable core second neck through hole,
39 can dynamic auxiliary fixed iron core (electromagnetic attraction setting auxiliary iron core),
39a can dynamic auxiliary fixed iron core upper end flange shape sliding part,
39aa can dynamic auxiliary fixed iron core upper end flange shape sliding part upper surface part magnetic opposite face,
39ab can dynamic auxiliary fixed iron core upper end flange shape sliding part pressing spring supporting portion bullport,
39b can dynamic auxiliary fixed iron core lower end cylinder shape sliding part,
39ba can dynamic auxiliary fixed iron core lower end cylinder shape sliding part tooth-strip part,
39c can dynamic auxiliary fixed iron core lower end cylinder shape sliding part guide annular aperture,
40 can dynamic auxiliary fixed iron core position adjustments part,
40a can dynamic auxiliary fixed iron core position adjustments part the inner pinion part,
40b can dynamic auxiliary fixed iron core position adjustments part outer end adjustment grip part,
The auxiliary primary clearance between movable core (electromagnetic attraction setting auxiliary iron core) and fixed iron core of Ln, L1, L2 cylindrical shape (can primary clearance) between dynamic auxiliary fixed iron core (electromagnetic attraction setting auxiliary iron core) and movable core.
Claims (18)
1. a circuit-breaker, it has electromagnetic trip device, and this electromagnetic trip device has: solenoid, and it is connected in series with movable contact and fixed contact therefor between power supply side terminal and load side terminal; And fixed iron core and movable core, they are configured in the magnetic circuit of this solenoid, if flow through the electric current of prescribed level in described solenoid, then described movable core is subject to the attraction of described fixed iron core by electromagnetic attraction, attracted to after on described fixed iron core at described movable core, by being made described movable contact be separated with described fixed contact therefor by open-close mechanism section, thus circuit-breaker carries out tripping action
The feature of this circuit-breaker is,
Between described movable core and described fixed iron core, be provided with and can set auxiliary iron core along the electromagnetic attraction of the direction movement of the attraction caused to the described electromagnetic attraction of described fixed iron core by described movable core, regulate by setting the position of auxiliary iron core on the direction of described attraction by position adjusting mechanism to described electromagnetic attraction, thus be set as multiple tripping characteristic.
2. circuit-breaker according to claim 1, is characterized in that,
Described electromagnetic attraction setting auxiliary iron core is arranged on described movable core, can move along the direction of described attraction.
3. circuit-breaker according to claim 1, is characterized in that,
Described fixed iron core responsible carries out the magnetic opposite face of described attraction and the responsible of described electromagnetic attraction setting auxiliary iron core, and to carry out the magnetic opposite face of described attraction parallel to each other,
The described magnetic opposite face of the described magnetic opposite face of described fixed iron core and described electromagnetic attraction setting auxiliary iron core is all orthogonal with the direction of described attraction.
4. circuit-breaker according to claim 1, is characterized in that,
Described fixed iron core responsible carries out the magnetic opposite face of described attraction and the responsible of described electromagnetic attraction setting auxiliary iron core, and to carry out the magnetic opposite face of described attraction parallel to each other,
The described magnetic opposite face of the described magnetic opposite face of described fixed iron core and described electromagnetic attraction setting auxiliary iron core all tilts relative to the direction of described attraction.
5. circuit-breaker according to any one of claim 1 to 4, is characterized in that,
Described electromagnetic attraction setting auxiliary iron core screws togather and is arranged on described movable core, can move along the direction of described attraction.
6. circuit-breaker according to any one of claim 1 to 4, is characterized in that,
Described electromagnetic attraction setting auxiliary iron core is formed with internal thread part,
Described movable core is formed the external thread part that the described internal thread part that sets auxiliary iron core with described electromagnetic attraction screws togather,
Described movable core can rotate around the center of described solenoid,
Described electromagnetic attraction setting auxiliary iron core can not rotate around the center of described solenoid,
By making described movable core rotate around the center of described solenoid, thus the described electromagnetic attraction setting position of auxiliary iron core on the direction of described attraction is regulated.
7. circuit-breaker according to claim 1, is characterized in that,
Described electromagnetic attraction setting auxiliary iron core is arranged on described fixed iron core, can move along the direction of described attraction.
8. circuit-breaker according to claim 7, is characterized in that,
Described movable core responsible carries out the magnetic opposite face of described attraction and the responsible of described electromagnetic attraction setting auxiliary iron core, and to carry out the magnetic opposite face of described attraction parallel to each other,
The described magnetic opposite face of the described magnetic opposite face of described movable core and described electromagnetic attraction setting auxiliary iron core is all orthogonal with the direction of described attraction.
9. circuit-breaker according to claim 7, is characterized in that,
Described movable core responsible carries out the magnetic opposite face of described attraction and the responsible of described electromagnetic attraction setting auxiliary iron core, and to carry out the magnetic opposite face of described attraction parallel to each other,
The described magnetic opposite face of the described magnetic opposite face of described movable core and described electromagnetic attraction setting auxiliary iron core all tilts relative to the direction of described attraction.
10. an electromagnetic trip device, it has: solenoid, is connected in series between the load side terminal of its power supply side terminal at circuit-breaker and described circuit-breaker with the movable contact of described circuit-breaker and the fixed contact therefor of described circuit-breaker; And fixed iron core and movable core, they are configured in the magnetic circuit of this solenoid, if flow through the electric current of prescribed level in described solenoid, then described movable core is subject to described fixed iron core and attracts by electromagnetic attraction,
The feature of this electromagnetic trip device is,
Between described movable core and described fixed iron core, be provided with and can set auxiliary iron core along the electromagnetic attraction of the direction movement of the attraction caused to the described electromagnetic attraction of described fixed iron core by described movable core, by position adjusting mechanism, the position of auxiliary iron core on the direction of described attraction is set to described electromagnetic attraction and regulate.
11. electromagnetic trip devices according to claim 10, is characterized in that,
Described electromagnetic attraction setting auxiliary iron core is arranged on described movable core, can move along the direction of described attraction.
12. electromagnetic trip devices according to claim 10, is characterized in that,
Described fixed iron core responsible carries out the magnetic opposite face of described attraction and the responsible of described electromagnetic attraction setting auxiliary iron core, and to carry out the magnetic opposite face of described attraction parallel to each other,
The described magnetic opposite face of the described magnetic opposite face of described fixed iron core and described electromagnetic attraction setting auxiliary iron core is all orthogonal with the direction of described attraction.
13. electromagnetic trip devices according to claim 10, is characterized in that,
Described fixed iron core responsible carries out the magnetic opposite face of described attraction and the responsible of described electromagnetic attraction setting auxiliary iron core, and to carry out the magnetic opposite face of described attraction parallel to each other,
The described magnetic opposite face of the described magnetic opposite face of described fixed iron core and described electromagnetic attraction setting auxiliary iron core all tilts relative to the direction of described attraction.
14., according to claim 10 to the electromagnetic trip device according to any one of 13, is characterized in that,
Described electromagnetic attraction setting auxiliary iron core screws togather and is arranged on described movable core, can move along the direction of described attraction.
15., according to claim 10 to the electromagnetic trip device according to any one of 13, is characterized in that,
Described electromagnetic attraction setting auxiliary iron core is formed with internal thread part,
Described movable core is formed the external thread part that the described internal thread part that sets auxiliary iron core with described electromagnetic attraction screws togather,
Described movable core can rotate around the center of described solenoid,
Described electromagnetic attraction setting auxiliary iron core can not rotate around the center of described solenoid,
By making described movable core around the center rotating of described solenoid, thus the described electromagnetic attraction setting position of auxiliary iron core on the direction of described attraction is regulated.
16. electromagnetic trip devices according to claim 10, is characterized in that,
Described electromagnetic attraction setting auxiliary iron core is arranged on described fixed iron core, can move along the direction of described attraction.
17. electromagnetic trip devices according to claim 16, is characterized in that,
Described movable core responsible carries out the magnetic opposite face of described attraction and the responsible of described electromagnetic attraction setting auxiliary iron core, and to carry out the magnetic opposite face of described attraction parallel to each other,
The described magnetic opposite face of the described magnetic opposite face of described movable core and described electromagnetic attraction setting auxiliary iron core is all orthogonal with the direction of described attraction.
18. electromagnetic trip devices according to claim 16, is characterized in that,
Described movable core responsible carries out the magnetic opposite face of described attraction and the responsible of described electromagnetic attraction setting auxiliary iron core, and to carry out the magnetic opposite face of described attraction parallel to each other,
The described magnetic opposite face of the described magnetic opposite face of described movable core and described electromagnetic attraction setting auxiliary iron core all tilts relative to the direction of described attraction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-270922 | 2012-12-12 | ||
| JP2012270922A JP6009340B2 (en) | 2012-12-12 | 2012-12-12 | Circuit breaker and electromagnetic trip device |
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| Publication Number | Publication Date |
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| CN103871797A CN103871797A (en) | 2014-06-18 |
| CN103871797B true CN103871797B (en) | 2016-03-16 |
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| CN201310334829.0A Active CN103871797B (en) | 2012-12-12 | 2013-08-02 | Circuit-breaker and electromagnetic trip device thereof |
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| CN104124114B (en) * | 2014-06-24 | 2016-08-24 | 上海诺雅克电气有限公司 | The short-circuit protection action current control method of multipolar electromagnetic electrical apparatus release and device |
| CN108695118A (en) * | 2017-04-07 | 2018-10-23 | 王静洋 | A kind of circuit breaker operation mechanism with solenoid actuated |
| JP6704542B2 (en) * | 2018-03-23 | 2020-06-03 | 三菱電機株式会社 | Trip device |
| CN108321056B (en) * | 2018-04-02 | 2024-05-03 | 浙江智美电气有限公司 | Circuit breaker pushed by electromagnet |
| WO2020026357A1 (en) * | 2018-07-31 | 2020-02-06 | 三菱電機株式会社 | Breaker |
| CN110299271A (en) * | 2019-07-05 | 2019-10-01 | 苏州未来电器股份有限公司 | A kind of bistable electro magnetic mechanism |
| JP7407565B2 (en) | 2019-11-12 | 2024-01-04 | 河村電器産業株式会社 | Tripping devices and circuit breakers |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4288770A (en) * | 1979-11-28 | 1981-09-08 | General Electric Company | Thermal override for static trip circuit breakers |
| EP0147278A2 (en) * | 1983-12-26 | 1985-07-03 | Merlin Gerin | Thermal-magnetic tripping mechanism of a circuit breaker made of shape memory effect material |
| EP0369899A1 (en) * | 1988-11-16 | 1990-05-23 | Merlin Gerin | Magnetic release device with a large capacity to adjust the release area |
| DE4004359A1 (en) * | 1990-02-13 | 1991-08-14 | Kloeckner Moeller Gmbh | Electro-magnetic quick-release mechanism for electric switch - has magnetic circuit incorporating bottom wall section of ferromagnetic housing of quick-release mechanism |
| CN1247370A (en) * | 1998-05-07 | 2000-03-15 | 尹顿公司 | Drive assembly with calibrating equipment |
| CN102064058A (en) * | 2009-11-13 | 2011-05-18 | 施耐德电器工业公司 | Electric protection device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53132779A (en) * | 1977-04-22 | 1978-11-18 | Matsushita Electric Works Ltd | Shorttcircuit current detector |
| JPS6176660U (en) * | 1984-10-25 | 1986-05-23 | ||
| JPH10125206A (en) * | 1996-10-24 | 1998-05-15 | Fuji Electric Co Ltd | Electromagnetic trip device for circuit breaker |
| JP5322545B2 (en) * | 2008-09-11 | 2013-10-23 | 三菱電機株式会社 | Circuit breaker |
-
2012
- 2012-12-12 JP JP2012270922A patent/JP6009340B2/en active Active
-
2013
- 2013-08-02 CN CN201310334829.0A patent/CN103871797B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4288770A (en) * | 1979-11-28 | 1981-09-08 | General Electric Company | Thermal override for static trip circuit breakers |
| EP0147278A2 (en) * | 1983-12-26 | 1985-07-03 | Merlin Gerin | Thermal-magnetic tripping mechanism of a circuit breaker made of shape memory effect material |
| EP0369899A1 (en) * | 1988-11-16 | 1990-05-23 | Merlin Gerin | Magnetic release device with a large capacity to adjust the release area |
| DE4004359A1 (en) * | 1990-02-13 | 1991-08-14 | Kloeckner Moeller Gmbh | Electro-magnetic quick-release mechanism for electric switch - has magnetic circuit incorporating bottom wall section of ferromagnetic housing of quick-release mechanism |
| CN1247370A (en) * | 1998-05-07 | 2000-03-15 | 尹顿公司 | Drive assembly with calibrating equipment |
| CN102064058A (en) * | 2009-11-13 | 2011-05-18 | 施耐德电器工业公司 | Electric protection device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6009340B2 (en) | 2016-10-19 |
| CN103871797A (en) | 2014-06-18 |
| JP2014116241A (en) | 2014-06-26 |
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