EP3345204A1 - Déclencheur à pression pour appareil électrique de protection de ligne - Google Patents
Déclencheur à pression pour appareil électrique de protection de ligneInfo
- Publication number
- EP3345204A1 EP3345204A1 EP17709131.1A EP17709131A EP3345204A1 EP 3345204 A1 EP3345204 A1 EP 3345204A1 EP 17709131 A EP17709131 A EP 17709131A EP 3345204 A1 EP3345204 A1 EP 3345204A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- actuator
- trigger
- chamber
- gases
- upstream chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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- 239000007789 gas Substances 0.000 claims description 68
- 239000002245 particle Substances 0.000 claims description 19
- 238000001514 detection method Methods 0.000 claims description 18
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000010891 electric arc Methods 0.000 description 7
- 230000035945 sensitivity Effects 0.000 description 7
- 230000035484 reaction time Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000007726 management method Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000011514 reflex Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000011345 viscous material Substances 0.000 description 2
- 102000000591 Tight Junction Proteins Human genes 0.000 description 1
- 108010002321 Tight Junction Proteins Proteins 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012913 prioritisation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 210000001578 tight junction Anatomy 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
- H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
- H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
- H01H2077/025—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with pneumatic means, e.g. by arc pressure
-
- 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
- H01H71/1009—Interconnected mechanisms
Definitions
- the invention relates to a pressure release device for electric line protection apparatus.
- the invention also relates to a circuit breaker type electrical protection device comprising such a pressure release device.
- the present invention more particularly relates to so-called “instantaneous” or “reflex” triggers that increase the speed of tripping of such devices, improving the effectiveness of the product in its main function of protection, and possibly the coordination / selectivity with other devices.
- other circuit breakers present in the same circuit, from the perspective of management of the protection of a site by conventional prioritization of circuit breakers.
- the invention makes it possible to adjust the response time of a circuit breaker, and consequently its operating level, with respect to the tripping time of other circuit breakers in the same circuit.
- Electrical apparatus of the circuit-breaker type on which an instantaneous trigger is installed comprise, per line, a pair of respectively fixed and movable contacts, a pair of devices connecting to said line, and a control lever of said contacts between a first position of opening and a second closing position.
- This control handle protrudes from the housing of the electrical apparatus and is connected to the movable contact by a mechanical lock cooperating with a contact carrier on which is mounted the movable contact.
- Trigger means of different types, obeying possible types of incidents on a line, are also provided to actuate the lock in case of problems on the line.
- the electronic trip units have a relatively long reaction time, of the order of 20 to 30 ms. This type of electronic release is therefore rather used in a breaker placed at the head end, to cut high short circuit currents.
- the fastest triggers consist of magnetic triggers.
- the major disadvantage is that this type of trigger is relatively large, so difficult to integrate in a head circuit breaker for example, in addition to the electronic trigger.
- the magnetic trip units therefore preferably equip the circuit breakers located downstream of the head circuit breaker. They are more sensitive to weak short-circuit currents with a reaction threshold of the order of 1500A.
- the aim is to equip the head-mounted circuit-breaker with a second trigger, of the pressure release type, which is faster than the first one.
- electronic trigger (with a reaction time of less than 10ms), and which has a reaction threshold of the order of 6000A, to let the downstream circuit breaker trigger alone.
- US2013 / 0126316 discloses a modular trigger, more easily integrated within a circuit breaker.
- this trigger has a very small pressure sensing surface, thus posing a problem of sensitivity in the overpressure detection.
- the trigger input port is placed directly in the arc chute, and captures the polluted gas, which causes a problem of pollution management within the trigger.
- the object of the present invention is thus to provide a modular pressure release, easily integrating into different types and calibres of electrical line protection apparatus, offering high sensitivity with optimal pressure detection, and this all avoiding as much as possible the introduction of pollution within the triggering mechanism.
- the present invention aims to overcome the various drawbacks mentioned above, by means of a pressure release device for electrical protection device line, circuit breaker type, the electrical apparatus comprising a breaking chamber in which gases are generated and escaping at a flow rate, said trigger comprising a housing and comprising inside the housing:
- This pressure trigger is mainly characterized in that the actuator is positioned between the upstream chamber and the downstream chamber and defines in itself partially the upstream chamber and the downstream chamber.
- the main idea of this invention is to provide a simplified modular actuator, whose actuator is directly part of the various chambers provided inside the housing.
- the housing construction is simplified because the actuator itself constitutes certain walls of the rooms. This reduces the volume of the housing, and get a very compact trigger.
- the actuator has a pressure sensing surface oriented towards the inside of the upstream chamber and consisting of a delimiting portion of the upstream chamber.
- the pressure sensing surface of the actuator is directly present in the upstream chamber, and constitutes in itself a wall of the chamber. This increases the sensitivity to the pressure of the actuator.
- the pressure sensing surface of the actuator is greater than the section of the gas inlet.
- the overpressure gases exert a force against a relatively large area within the upstream chamber.
- the surface on which the gases are supported is increased, and the force exerted on the actuator is higher.
- the actuator can thus rotate more quickly to trigger the electrical device. This specific construction of the trigger thus makes it possible to reduce the response time of the actuator, to make it a reflex trigger of high quality.
- the actuator is able to trigger for a low pressure within the upstream chamber. He is therefore very sensitive to pressure. This high sensitivity makes it possible to refrain from having large gas flows entering the trigger to activate it.
- the upstream chamber expands from the inlet port to the pressure sensing surface. This enlargement allows the gases to be correctly guided towards the detection surface so as to distribute their pressure force homogeneously over the entire sensing surface of the actuator.
- the trigger comprises means for recovering residual pollution particles present in the gases.
- said means for recovering residual pollution particles consist of a baffle designed to trap the particles by reducing the flow velocity of the gases.
- baffles make it possible to slow down the path of the gases, and thus to let the pollution particles, which are heavier, fall to the bottom of the baffle and agglomerate.
- the baffle is located in the extension of the upstream chamber.
- the actuator has a protrusion capable of being inserted inside the baffle.
- the length of said protuberance is dimensioned so that the protuberance constitutes a delimiting portion of the upstream chamber when the actuator is in the trigger position. Indeed, when the actuator moves from the rest position to the trigger position, its pressure detection surface changes position within the interrupting chamber. Without protrusion, this change of position would create a large opening to the baffle in which the gases would introduce massively, creating a rapid depression in the upstream chamber, sometimes before the actuator had time to arrive at its trigger position.
- the protrusion makes it possible on the one hand to limit the opening towards the baffle in order to maintain the overpressure in the upstream chamber during the tripping time, and on the other hand to maintain a constant pressure detection surface on the actuator during the tripping. , so that the same force is applied to the actuator regardless of its position. This allows a better constancy in the triggering.
- said housing comprises two half-shells able to assemble.
- the trigger is thus in the form of a module, or a cassette, suitable to be added to an electrical device to provide an additional function.
- each of the half-shells has a side face and the actuator has two lateral faces each vis-à-vis a side face of the half-shells
- the trigger comprises means for limiting the escape of gas in said operating sets, comprising a layer of a viscous product homogeneously distributed between the lateral faces of the actuator and the lateral faces of the half-shells located vis-à-vis. This layer makes it possible to fill the space to prevent massive gas leakage.
- the actuator comprises an arm having a first end and a second end, the arm having a pivot connection at the first end, and a trigger tip at the end. second end, said end protruding from the housing through an opening made for this purpose in the downstream chamber. This tip is placed closer to the trigger elements of the lock of the electrical device to reduce the reaction time for the cut.
- Said return means comprise a compression spring bearing on the one hand on the actuator and on the other hand on a surface of the downstream chamber. This return spring makes it possible to calibrate the activation level of the pressure release device, with a view to selective operation of the trigger with the associated devices.
- said housing is provided with positioning and centering means, of the tab or tongue or groove type, for its attachment within an electrical line protection device. This allows you to mount the trigger at the last moment in an electrical device. This facilitates the management of electrical device variants.
- the invention also relates to a circuit breaker-type electrical protection device comprising an interrupting chamber and comprising at least one trigger as described above, said trigger being positioned in the vicinity of an interrupting chamber.
- the inlet orifice of the release is offset relative to the interrupting chamber so as not to suck up the pollution particles present in the cutoff gases, a channel being provided between the interrupting chamber and the orifice trigger input.
- the gases generated by the electric arc at the time of opening of the contacts are directed towards the die of the arc chute. Most of the pollution particles present in the gases will scatter in this chamber, around the deions, or will directly escape with the gases to the outside. The arrival of these polluted gases causes the compression of the clean air present in the channel, which corresponds then a clean gas, and pushes it in the trigger in order to move the arm of the release. The more the trigger is sealed by the viscous material, the lower the air flow required to move the arm, and the less polluted gases can reach the upstream chamber of the trigger.
- the gas arriving in the upstream chamber is relatively clean, and the polluted gases stagnate in the channel, the particles of pollution then being deposited on the walls of the channel or falling in the chamber of cutoff.
- the viscous material has a thermal inertia which traps the particles of pollution residuals, made of molten metal, by freezing them on the spot after very rapid cooling.
- the inlet section of the channel is relatively small compared to the volume of the breaking chamber, which limits the flow of gases within the channel, thus reducing the amount of pollution and the risk of fouling of the channel and the mechanism of the trigger. In the context of the present invention, this limitation of the flow rate is not disadvantageous given the high sensitivity of the actuator within the release.
- the electrical line protection device may comprise a control handle pivotally mounted relative to the at least one trigger to be able to adopt four predetermined positions: a first closed position, a second trigger position, a third reset position and a fourth position. opening position, the control lever comprising a frame having suitable support means and intended to bear against the trigger actuator when the actuator is in the release position to return it to the rest position during the passage from the control handle from the second trip position to the third reset position.
- the support means push on the actuator of the pressure release, overcomes the friction in the event of fouling by gases, and returns the actuator to the rest position.
- Said armature may preferably comprise two lateral faces and each of the lateral faces may comprise support means, preferably a projecting axis.
- FIG. 1 illustrates in perspective, a first lateral profile of the trigger according to one embodiment
- FIG. 2 illustrates in perspective, the second lateral profile of the trigger according to the embodiment of Figure 1;
- FIG. 3 is an exploded perspective view of the release according to the embodiment of FIG. 1;
- FIG. 4 shows, in perspective, the interior of the release with its actuator in the rest position according to the embodiment of Figure 1;
- - Figure 5 shows, in perspective, the inside of the trigger with its actuator in the release position according to the embodiment of Figure 1 and wherein the biasing means are not shown;
- FIG. 6 shows the integration of the trigger according to the embodiment of Figure 1 in an electrical line protection apparatus
- FIG. 7 shows an electrical apparatus comprising a trigger according to the embodiment of FIG. 1 and whose control lever is in the first closed position comprising two pressure detectors in the rest position;
- FIG. 8 shows the electrical apparatus of Figure 7, the control lever is in the first closed position with two pressure sensors in the release position;
- FIG. 9 shows the electrical apparatus of FIG. 7, the control handle of which is in the second tripping position comprising two pressure detectors in the tripping position;
- FIG. 10 shows the electrical device of Figure 7, the control handle is in third reset position with two pressure sensors in the rest position.
- the trigger 1 to pressure comprises a housing 3 comprising two half-shells 3a, 3b, trapping an actuator 2 comprising a second end 13b protruding from the housing 3.
- the half hulls 3a, 3b and the actuator 2 are preferably designed in a polymeric material, in order to best support the hot gases G repeatedly and without deformation. This is a trigger 1 considered as "miniature”.
- These two half-shells 3a, 3b have corresponding shapes, and fit into one another. They are fixed to one another, preferably by snap: three snaps 4 are provided in the upper part (according to the provision of the trigger 1 in these figures), and four snaps 4 are provided in the lower part. This cutter makes it possible to close and seal the casing 3 effectively.
- This casing 3 thus closed can be added to a cut-off unit of an electrical line protection appliance, depending on the desired selectivity, as illustrated in FIG. 6. To do this, the casing 3 fits into the electrical appliance in the vicinity of a trigger bar 32 actuating the lock of the electrical apparatus.
- the housing 3 is placed in position in the electrical apparatus by means of a rail 6 (visible in FIG. 1) extending from an outer wall 3c of the half-shell 3a and able to slide in a groove (not shown) provided for this purpose in a fixed wall of the electrical apparatus located in the vicinity of the control lever 40 of the electrical apparatus.
- the rail 6 is one of the positioning and centering means possible, other equivalent means are possible, such as a tab.
- the casing 3 comprises a tongue 5 adapted to be positioned under a stop 38 belonging to the lock of the electrical apparatus, and forming part of the same structure as that to which the trigger bar 32 is fixed, as illustrated by FIG. Figure 6.
- the housing 3 is held in position by the tongue 5 in the electrical apparatus.
- the tongue 5 is one of the possible positioning and centering means.
- the housing 3 can thus be mounted in the electrical apparatus following a simple translational movement. This installation is easy and fast, and is done at the last moment on an electrical device already ready for operation. The level of selectivity of the electrical appliance can therefore be decided last.
- the trigger 1 has a gas inlet port 8 G, delimited by a flexible sealing lip 7.
- this inlet orifice 8 is found positioned against a gas outlet mouth G coming from a breaking chamber 34 of the electrical apparatus, as illustrated in FIG. 6.
- the sealing lip 7 makes it possible to form a tight junction between this outlet mouth and the inlet orifice 8.
- FIG. 3 is an exploded view of the trigger 1, which makes it possible to better visualize the inside of the trigger 1 and the shape of the actuator 2.
- the actuator 2 preferably comprises a pivoting arm which is disposed inside the trigger 1 and which comprises a first end 13a and a second end 13b which is free.
- An orifice 14, preferably through is formed in the first end 13a of the arm.
- a shaft 19 protruding from the half-shell 3b is inserted into this orifice 14 when the half-shells 3a, 3b are assembled together to form the housing 3.
- This shaft 19 therefore constitutes the pivot axis of the actuator 2 to form a pivot link.
- the second end 13b of the arm comprises a trigger tip 17 which protrudes from the housing 3. This tip 17 is adapted to come into contact with the trigger bar 32 to cause the triggering of the electrical device.
- the actuator 2 further comprises an upper surface 24a, a lower surface 24b opposite and two side faces 25a, 25b located vis-à-vis the side faces of the half-shells 3a, 3b.
- the upper surface 24a comprises a recess 16 on which is disposed a centering pin 15 projecting relative to the recess 16.
- the actuator 2 is movable in rotation between a rest position, as shown in FIGS. 1, 2 and 4, and a release position as illustrated in FIG. 5. This pivoting of the actuator 2 is effected against means of rotation.
- recall 27, consisting here of a spring helical compression, without this example being limiting.
- the return means 27 comprise, on the one hand, a first end 27b which bears against a surface 26 of the half-shell 3b situated in the upper part, and on the other hand a second end 27a which bears against the bottom of the recess 16 formed on the upper surface 24a of the actuator 2.
- the centering pin 15 which protrudes from the recess 16, extends towards the inside of the coil spring in order to center the latter and to keep it in position in the recess 16.
- the actuator 2 may rotate more or less easily.
- the actuator 2 also comprises two protuberances 1 1, 10 extending from the lower surface 24b opposite to the upper surface 24a, and able to be inserted in two baffles 20, 21 provided for this purpose in the lower part of the half -coque 3b, one next to the other.
- the protuberances 11, 10 and the baffles 20, 21 have corresponding shapes, as shown in FIG.
- the lower surface 24b of the actuator 2 has a pressure detection surface 12 extending longitudinally between its first end 13a and the two protuberances 11, 10.
- This detection surface 12 is therefore relatively wide, and represents substantially about half the length of the actuator 2.
- the actuator 2 further comprises a surface 18 lying in the extension of this pressure detection surface 12 and corresponds to at one side of the first protrusion 1 1.
- the trigger 1 comprises two chambers, as illustrated in FIGS. 4 and 5:
- the actuator 2 in itself separates the upstream chamber 28 from the downstream chamber 29.
- the upstream chamber 28 is mainly delimited by the two lateral faces of the half-shells 3a, 3b, by two surfaces 22, 23 both belonging to the half-shell 3b, and by the detection surface 12 of the actuator 2, which thus consists of a delimiting portion of the upstream chamber 28.
- the detection surface 12 is optimized with respect to the upstream chamber 28.
- the two faces 22, 23 of the half-shell 3b connect the inlet orifice 8 to the detection surface 12.
- the upstream chamber 28 thus progressively expands between the inlet orifice 8 and the detection surface. 12, the latter being significantly larger than the section of the inlet orifice 8.
- This gradual enlargement of the upstream chamber 28 allows the gases G to be well distributed in the upstream chamber 28 while being guided towards the detection surface 12 and to exert a pressure force on the entire detection surface 12.
- the pressure force is spread over a large area, which allows the actuator 2 to pivot easily, even for low pressure levels .
- the pressure / force efficiency of the trigger 1 is thus optimized.
- the orientation of the gas G pressurized on the actuator 2 optimizes the dynamic aspects of the trigger 1, and in particular to exploit the effects of the dynamic forces of the phenomenon of "water hammer" on the actuator 2.
- the downstream chamber 29 is mainly delimited by the two lateral faces of the half-shells 3a, 3b, by the surface 26, and by the upper surface 24a of the actuator 2.
- This chamber 29 has an opening 9 through which the nozzle 17 triggering the actuator 2, as shown in Figures 1 and 2.
- the gases G coming from the breaking chamber 34 following an electric arc creation E enter the upstream chamber 28 via the inlet orifice 8 with a flow velocity. These gases G come to exert a pressure on the detection surface 12 of pressure, the actuator 2 being in the rest position. When the pressure exceeds a certain threshold, the actuator 2 pivots against return means 27 until it reaches the triggering position.
- the protuberances 1 1, 10 of the actuator 2 are fully retracted into the baffles 20, 21.
- the tripping position see FIG. 5
- the surface 18 of the first protrusion 1 1 also partially delimits the upstream chamber 28 and thus forms a delimiting portion of the upstream chamber 28.
- the upstream chamber 28 is always delimited by walls, and does not have a large opening for exhaust gas G, this to avoid any sudden depression in the upstream chamber 28, which prevent the actuator 2 to be in a stable position trigger.
- the volume of gas G present in the upstream chamber 28 remains substantially constant over the entire stroke of the actuator 2 through this baffling.
- the pressure force applied to the actuator 2 by the gases G is therefore substantially constant over the entire stroke of the actuator 2, which makes it possible to reduce the dispersion of the trigger level.
- the protrusion assemblies 10, 11 and baffles 20, 21 are dimensioned so that a stream of gas G can circulate in the baffles 20, 21.
- the role of these baffles 20, 21 is to reduce the flow velocity of gas G to recover fine particles of pollution present in the gases G.
- the baffles 20, 21 are therefore means for recovering the possible pollution particles. These particles then fall to the bottom of the baffles 20, 21 and agglomerate.
- the presence of two baffles 20,21 one after the other makes it possible to double the efficiency of the recovery of the particles.
- the second baffle 21 opens on the opening 9 of the downstream chamber 29.
- the actuator 2 rests on the walls defining the second baffle 21, and the gas thread G remains trapped in the baffles 20, 21. As soon as the actuator 2 begins to pivot, it releases the passage and the gas stream having passed through the two baffles 20,21 then escapes outwards via the opening 9 of the downstream chamber 29.
- the gases G also tend to escape along the lateral faces 25a, 25b of the actuator 2, since an operating clearance is provided between these side faces 25a, 25b and the half-shells 3a, 3b, so that that the actuator 2 can rotate freely without friction with the half-shells 3a, 3b.
- This operating clearance is preferably of the order of 2 to 3 hundredths of a millimeter.
- this exhaust could also create a sudden depression in the upstream chamber 28, which is not desirable.
- This viscous product is sufficiently deformable and flexible to allow the actuator 2 to rotate freely, and is sufficiently consistent to stop the gas G. Only a gas net G can succeed in infiltrating between the side faces 25a, 25b and the half-shells 3a, 3b, to arrive in the upstream chamber 28, and thus escape through the opening 9.
- the viscous product is one of the means of limiting the possible escape.
- the gas exhaust G is exclusively gentle and slow, to give great stability and consistency to the pressure release system.
- the gas flow G passing through the trigger 1 can thus be regulated by acting on the operating clearances, and on the thickness of the viscous product layer.
- Figure 6 shows the trigger 1 in its environment, the actuator 2 being in the rest position.
- the trigger tip 17 is located under the trigger bar 32 of the lock, so closer to the lock, to minimize the reaction time.
- the pivoting of the actuator 2 causes the pivoting of the trigger bar 32.
- the inlet orifice 8 is positioned at the outlet of a channel 31 formed in a fixed wall 33 of the electrical apparatus and originating in the electric arc breaking chamber 34 where the extinction dies 35 are located. of the electric arc E.
- the electric arc E is produced by the opening of the fixed contacts 36 and mobile 37.
- the breaking chamber 34 comprises the zone surrounding the contacts 36, 37, the zone surrounding the deions 35, and the input zone of the channel 31. It is in a plane offset from the plane in which trigger 1 is located, as illustrated by the dashed. In this figure 6, the interrupting chamber is in a so-called "front” plane, and the trigger is in a so-called “rear” plane. More specifically, the channel 31 comprises:
- the channel 31 does not directly originate in the vicinity of the fixed contacts 36 and mobile 37, where the G gases are the most polluted, but in the vicinity of the déions 35, in an area where the pollution particles have for the most part already been put next to.
- the air initially present in the channel 31 is clean. Following the appearance of an electric arc E, the polluted G gases created fill the volume of the breaking chamber 34, and then compress the clean air in the channel 31, then pushes it towards the trigger 1. These are therefore clean gases G which arrive in the upstream chamber 28 of the trigger 1, and which activate the arm 2.
- the arrows crossing the channel 31 illustrate the path of the gases G through the channel 31 and the upstream chamber 28 of the trigger 1.
- the section of the inlet orifice 8 of the channel 31 is relatively small, compared to the orifices of the prior art. Indeed, in the present invention, it is not necessary to enter a lot of gas G in the trigger 1 to activate it. This is possible thanks to the extent of the detection surface 12 which gives a high sensitivity to the trigger 1. Limiting the amount of G gas entering the channel 31 also limits the risk of pollution and fouling of the channel 31 and the mechanism of the trigger 1.
- the section of the inlet orifice 8 of the channel 31 corresponds approximately to the section of the inlet orifice 8 of the trigger 1. There is no loss of charge. This limitation of the gas flow G also makes it possible to increase the static force on the actuator 2.
- the electrical apparatus may comprise two triggers 1 to pressure as described above which are arranged facing each other and each comprising an actuator 2.
- the electrical apparatus comprises a control handle 40 can adopt four predetermined positions: a first closed position ( Figures 7 and 8), a second release position ( Figure 9), a third reclosing position ( Figure 10) and a fourth open position (not shown).
- the control handle 40 is mounted on a frame 41 having two lateral faces 41a, 41b spaced from each other and substantially parallel to each other.
- the armature 41 is preferably a metal sheet metal part having a shape whose section has a shape of U.
- the control lever 40 is fixed on the upper part of the armature 41, for example by clipping.
- the armature 41 is pivotally mounted relative to the two triggers 1, for example, by means of pivot links. This arrangement allows the control handle 40 to switch from one position to another.
- the armature 41 of the control lever 40 thus comprises two axes 43 which can respectively bear on the actuators 2 of the triggers 1 under pressure.
- the axis 43 may bear on the upper surface 24a of the actuator 2.
- the actuators 2 may remain blocked in the trigger position.
- the return means 27 of the trigger 1 are then no longer sufficient to return the actuators 2 in the rest position.
- the return means 27 continue to adjust the trigger threshold but no longer allow reclosing, that is to say the passage of the second trigger position to the third reset position.
- the axes 43 make it possible to perform this function and come in relay means of return 27.
- the two axes 43 respectively bear against the two actuators 2 to bring them back to their rest position.
- Axes 43 may alternatively be replaced by any support means adapted and intended to bear against the actuator 2 during the passage of the second trigger position to the third reset position.
- Figure 7 illustrates the control lever 40 in the first closed position with the actuators 2 of the triggers 1 in the rest position, the axes 43 are remote from the upper surfaces 24a of the actuators 2 to enable them to perform their function.
- FIG. 8 illustrates the control lever 40 in the first closed position with the actuators 2 of the triggers 1 in the tripped position, the actuators 2 are raised in the direction of the trigger bar 32 and are in contact with the upper surface 24a of FIG. each actuator 2.
- FIG. 9 illustrates the control lever 40 in the second triggering position with the actuators 2 of the triggers 1 in the tripping position and the axes 43 which push on the upper surface 24a of the actuators 2 to return them to the rest position.
- FIG. 10 illustrates the control lever 40 in the third triggering position with the actuators 2 of the triggers 1 in the rest position. This This configuration is of particular interest for Molded Case Circuit Breaker (MCCB) circuit breakers.
- MCCB Molded Case Circuit Breaker
- this solution makes it possible to de-correlate the tripping function at a pre-calibrated current level which is provided by the return means 27 of the return function of the actuator 2 in the rest position.
Landscapes
- Breakers (AREA)
- Circuit Breakers (AREA)
- Gas-Insulated Switchgears (AREA)
- Switch Cases, Indication, And Locking (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1660906A FR3058560B1 (fr) | 2016-11-10 | 2016-11-10 | Declencheur a pression pour appareil electrique de protection de ligne |
PCT/FR2017/050292 WO2018087437A1 (fr) | 2016-11-10 | 2017-02-09 | Déclencheur à pression pour appareil électrique de protection de ligne |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3345204A1 true EP3345204A1 (fr) | 2018-07-11 |
EP3345204B1 EP3345204B1 (fr) | 2022-04-06 |
Family
ID=58009973
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17709131.1A Active EP3345204B1 (fr) | 2016-11-10 | 2017-02-09 | Déclencheur à pression pour appareil électrique de protection de ligne |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3345204B1 (fr) |
JP (1) | JP7071353B2 (fr) |
CN (1) | CN109923635B (fr) |
FR (1) | FR3058560B1 (fr) |
WO (1) | WO2018087437A1 (fr) |
Families Citing this family (1)
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FR2682530B1 (fr) * | 1991-10-15 | 1993-11-26 | Merlin Gerin | Gamme de disjoncteurs basse tension a boitier moule. |
KR100616084B1 (ko) | 2004-10-07 | 2006-08-25 | 엘에스산전 주식회사 | 배선용차단기의 압트립 장치 |
DE102009015222A1 (de) | 2009-03-31 | 2010-10-07 | Siemens Aktiengesellschaft | Auslöser für eine elektrische Schaltanordnung |
JP5531907B2 (ja) * | 2010-10-20 | 2014-06-25 | 三菱電機株式会社 | 回路遮断器 |
US8519287B2 (en) * | 2010-11-15 | 2013-08-27 | Schneider Electric USA, Inc. | Circuit breaker with controlled exhaust |
US8471655B2 (en) * | 2011-01-05 | 2013-06-25 | Schneider Electric USA, Inc. | Piston trip reset lever |
CN103021750B (zh) * | 2011-09-22 | 2015-11-18 | 上海电器股份有限公司人民电器厂 | 带有气动脱扣装置的低压断路器 |
US8698024B2 (en) * | 2011-11-18 | 2014-04-15 | Schneider Electric USA, Inc. | Pressure sensitive trip mechanism with debris control |
FR2987163B1 (fr) | 2012-02-16 | 2017-04-21 | Hager-Electro Sas | Declencheur a pression. |
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2016
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CN109923635A (zh) | 2019-06-21 |
WO2018087437A1 (fr) | 2018-05-17 |
FR3058560B1 (fr) | 2019-08-23 |
JP7071353B2 (ja) | 2022-05-18 |
FR3058560A1 (fr) | 2018-05-11 |
JP2019536208A (ja) | 2019-12-12 |
EP3345204B1 (fr) | 2022-04-06 |
CN109923635B (zh) | 2021-05-04 |
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