EP2189995B1 - Control of high- or medium-voltage electrical switchgear with improved double latching and associated arming method - Google Patents

Control of high- or medium-voltage electrical switchgear with improved double latching and associated arming method Download PDF

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Publication number
EP2189995B1
EP2189995B1 EP09176296A EP09176296A EP2189995B1 EP 2189995 B1 EP2189995 B1 EP 2189995B1 EP 09176296 A EP09176296 A EP 09176296A EP 09176296 A EP09176296 A EP 09176296A EP 2189995 B1 EP2189995 B1 EP 2189995B1
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EP
European Patent Office
Prior art keywords
closing
opening
spring
wheel
gearwheel
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EP09176296A
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German (de)
French (fr)
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EP2189995A3 (en
EP2189995A2 (en
Inventor
Romain Maladen
Antoine Vicaigne
Bruno Colin
Mathieu Marquet
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Schneider Electric Energy France SAS
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Schneider Electric Energy France SAS
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Publication of EP2189995A3 publication Critical patent/EP2189995A3/en
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Publication of EP2189995B1 publication Critical patent/EP2189995B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3042—Power arrangements internal to the switch for operating the driving mechanism using spring motor using a torsion spring

Definitions

  • the invention relates to the field of control of electrical equipment high or medium voltage with at least one switch.
  • It relates to the controls which comprise a double latching mechanism whose disarming is capable of causing a closing / opening cycle of at least one operating switch of the electrical equipment.
  • the invention relates more particularly to the controls in which the double-hooking mechanism comprises two spiral springs whose disarming of one said opening spring is able to cause a maneuver opening the switch while the disarming of the other said closing spring is capable of causing a closing operation of the switch.
  • the object of the invention is to propose a new control of this type whose motorized rearming is improved and which still allows manual reset.
  • the double latching mechanisms can store energy to perform two operations of at least one switch of the electrical equipment which is provided with a closing maneuver and an opening maneuver.
  • a known type of double-hook mechanisms is that comprising two spiral springs, typically having a high stiffness for high or medium voltage application. They are compressed during a maneuver called “arming" that can be performed manually (with a lever) and / or motorized.
  • the mechanisms comprising two coaxial coil springs are preferred over those comprising one (or more) compression spring (s) because they make it possible on the one hand to design a compact system and on the other hand to obtain a ideal energy distribution since the torque supplied by each of the spiral springs is maximal at the beginning of the maneuver (when the spring is compressed to the maximum) and that it is always ideally oriented (zero radial force).
  • Such a double-hook mechanism with two spiral springs with high stiffness is known from the document EP 0186171 which discloses a control of a high-voltage circuit breaker in which there is provided a closing spiral spring 2 which in the compressed state exerts a torsion torque on a transmission shaft 4 on which its inner end is fixed, a spring in opening spiral 1 which in the compressed state exerts a torsion torque on a control shaft 3 on which its inner end is fixed.
  • the actuation of a drive motor 22 compresses the closing spring 2 by means of a belt 23.
  • the transmission shaft 4 is aligned with the control shaft 3 and coupling means comprising a star wheel 6 are arranged between them in order to couple them and thus allow the closing of the circuit breaker.
  • Such a coupling also simultaneously allows the compression of the opening spring 1 by the release of the closing spring 2.
  • the main disadvantage of the control disclosed in this document is that for an opening energy similar to the closing energy, it a closing spring 2 is required which can store twice as much energy as necessary for the actual closing maneuver, since the opening spring 1 is compressed by the expansion of the closing spring 2.
  • the torque needed to arm the closing spring 2 corresponds to the sum of the theoretical arming torques of a closing spring and an opening spring required only for a given cycle closing / opening with a completely dissociated operation.
  • the controls of this type may also optionally include a geared motor as a motorized means for rearming the two closing and opening springs when they are in the relaxed state and that they were thus used to perform a maneuver of closing and opening at least one high or medium voltage switch.
  • a geared motor as a motorized means for rearming the two closing and opening springs when they are in the relaxed state and that they were thus used to perform a maneuver of closing and opening at least one high or medium voltage switch.
  • the inventors have also been confronted with an additional problem that is not known to date for this type of control: they must design a control capable of making an opening and closing maneuver of at least one high or medium voltage switch with a total simultaneous arming torque of the two springs of the order of 120 Nm
  • the subject of the invention is a high or medium voltage switchgear control comprising a double-snap mechanism, an armature gearmotor of the double-snap mechanism and a transmission chain for transmitting the output torque of the gearmotor to an element of the double-snap mechanism.
  • the control according to the invention thus allows to be able to operate a switch of a high or medium voltage switchgear which requires a large operating torque of the order of 120 N.m.
  • the solution according to the invention can very well be applied for weaker couples and would thus reduce the power of the motor or geared motor by a factor of 2.
  • the basic idea of the solution consists, for a motorized maneuver, of compressing the two springs one after the other with the aid of the same gearmotor.
  • the motor provides a couple of times lower, which reduces its cost, dimensions and power consumption.
  • the torque supplied by the geared motor is of the order of 60 Nm
  • the solution presented allows, in manual operation, to arm the mechanism in a single operation (a single direction of maneuver) and thus to compress the two springs simultaneously.
  • the control according to the invention thus makes it possible to meet the normative conditions of manual arming.
  • the reduction ratios between the closing pinion and the third pinion and between the opening pinion and the fourth transmission pinion are identical and coupling means are provided for coupling the pinion closure and the wheel only after the opening spring has been compressed by the output torque of the gearmotor in one direction and the opening wheel has been engaged, the coupling between the closing pinion and the arming wheel permitting compressing the closing spring by the output torque of the gearmotor in the other direction and hooking the arming wheel while the opening spring remains in the same compressed state.
  • the coupling means comprise an axis fixed to the closing gear and a so-called arming finger able to disengage from the arming wheel at the end of the maneuver under the thrust action of the pin fixed to the pinion. closure.
  • the opening and closing wheels are each designed with a recess for respectively housing the opening and closing spring.
  • the closing pinion is removable, the interruption of the transmission chain being achieved by removal of said pinion closure.
  • the closing pinion is thus replaced by a manual cocking lever.
  • a control particularly targeted by the invention is that in which, in the uninterrupted state of the chain, the geared motor is able to provide an output torque of about 60 Nm to compress each of the two springs while, in the interrupted state of the chain, the two springs are able to be compressed simultaneously with a rearming torque of 120 Nm
  • the invention also relates to a manual cocking lever comprising a male portion adapted to be fitted in place of the closing pinion of the control described above, and a tab which has the same function as the axis of said pinion.
  • the control according to the invention 1 as shown first comprises a fixed frame not shown and a geared motor which only the output gear 2 is shown.
  • the control according to the invention further comprises a transmission chain 4 for transmitting the rotational movement of the output gear 2 of the geared motor in a rotational movement to the control shaft 30 and according to the different arming phases to one of the wheels 31, 32, 33 to compress the closing spring 34 and the opening spring 35.
  • the characteristics of the opening pinion 41 are identical to those of the closing pinion 40 so that the reduction ratios on the one hand between the closing pinion 40 and the transmission shaft 42 (pinion 43) and on the other hand between the pinion opening 41 and transmission shaft 42 (pinion 44) are identical.
  • spiral springs 34 and 35 are identical.
  • both spiral springs 34 and 35 remain in a compressed state or in other words pre-compressed (pre-compressed to a given level, necessary only for operation).
  • the closing wheel 31 comprises a recess which forms a cage in which the closing spiral spring 34 is housed.
  • the opening wheel 33 is recessed and the cage thus formed houses the spiral spring 35 opening.
  • the two spiral springs 34, 35 are pre-compressed and thus support the arming wheel 32, and the opening wheel 33 resting on the column 36 (FIG. Figure 1A ).
  • the closure wheel 31 is, in turn, retained by a hooking means (not shown) coming to hook the recess 310 of the wheel 31.
  • the arming maneuver thus consists in compressing the two spiral springs 34, 35 by their inner end.
  • the total torque required for a combined opening / closing operation of the switch of the apparatus is such that a motorized arming of the closing spring 34 and then of the opening spring 35 is provided.
  • the gearmotor realizes the compression of the two spiral springs 35 opening and closure 34 but that it provides only the torque required for the compression of a single spring 34 or 35, being of the order of 60 Nm
  • the double latching mechanism 3 is now in the armed position, the two spiral springs respectively opening 35 and closure 34 being compressed and the opening pinion 40 being free.
  • the opening / closing operation can be carried out conventionally either manually by means of a push button or automatically, in the event of an electrical fault detected on the electrical line on which the electrical equipment provided with the control is implanted, under the action of an electric trip coil.
  • the control according to the invention 1 meets the normative conditions which impose a manual arming of the two spiral springs 34 and 35 with a lever from outside the control and in a single direction of rotation.
  • the lever 5 comprises a male part 50 which is engaged in place of the closing pinion 40 and a tab 500 which has the same function as the axis 400 of the transmission pinion 40.
  • the tab 500 is thus wedged between the arming finger 320 and the arming wheel 32. In other words, the arming finger 320 is closed on the leg 500.
  • the closure wheel 31 is hooked by its recess 310 and held in position.
  • Phase 2 ( figure 3B ) : The operator rotates clockwise lever 5 which is supported on the cocking pin 320 and wedged between it and the cocking wheel 32: the cocking wheel 32 is then rotated.
  • the cocking wheel 32 is rotatably connected to the control shaft 30 and the respective closing and opening wheels 33 being locked in rotation (the first 31 by the hooking and the other 33 by its support on the column 36), the two spiral springs respectively opening 35 and closure 34 are then compressed simultaneously by their inner end as fixed to the control shaft 30.
  • the arming wheel 32 is hooked by the attachment means not shown: the two respectively aperture spring 35 and closure 34 are compressed (total torque 120 Nm) and maintained in this state.
  • the double latching mechanism 3 has therefore been manually armed.
  • Phase 3 ( figure 3C ) : Before an opening / closing cycle can be carried out, just like the motorized armament, a disengagement or disengagement between the arming lever 5 and the command 1 is carried out.
  • This clutch is made at the end of manual arming, that is to say after hooking of the arming wheel 32.
  • the operator continues to turn the cocking lever 5 clockwise, which causes the release of the cocking finger 320 of the cocking wheel 32 under the thrust action of the axis 500.
  • the lever 5 can then be released by disengaging it from the end 301 of the control shaft 30.

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  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Transmission Devices (AREA)
  • Control Of Electric Motors In General (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Control Of Ac Motors In General (AREA)
  • Mechanisms For Operating Contacts (AREA)

Abstract

The controller has a gear motor (2) for operating a double latching mechanism (3), and a transmission chain (4) to transmit an output torque of the motor to an element (30) of the mechanism. An opening spring (35) and a closing spring (34) are compressed simultaneously by a single manual operation in an interrupted state of the chain through an output torque along two different directions. The chain and the mechanism allow the opening spring to remain in a compressed state during compression of the closing spring, in the uninterrupted state. An independent claim is also included for a method for operating a double-latching mechanism with two spiral springs, of a high or medium voltage electrical equipment controller.

Description

DOMAINE TECHNIQUETECHNICAL AREA

L'invention concerne le domaine des commandes des appareillages électriques haute ou moyenne tension muni au moins d'un interrupteur.The invention relates to the field of control of electrical equipment high or medium voltage with at least one switch.

Elle concerne les commandes qui comprennent un mécanisme à double accrochage dont le désarmement est apte à provoquer un cycle de fermeture/ouverture d'au moins un interrupteur en exploitation de l'appareillage électrique.It relates to the controls which comprise a double latching mechanism whose disarming is capable of causing a closing / opening cycle of at least one operating switch of the electrical equipment.

L'invention concerne plus particulièrement les commandes dans lesquelles le mécanisme à double accrochage comprend deux ressorts spirale dont le désarmement de l'un dit ressort d'ouverture est apte à provoquer une manoeuvre d'ouverture de l'interrupteur tandis que le désarmement de l'autre dit ressort de fermeture est apte à provoquer une manoeuvre de fermeture de l'interrupteur.The invention relates more particularly to the controls in which the double-hooking mechanism comprises two spiral springs whose disarming of one said opening spring is able to cause a maneuver opening the switch while the disarming of the other said closing spring is capable of causing a closing operation of the switch.

L'invention vise à proposer une nouvelle commande de ce type dont le réarmement motorisé est amélioré et qui autorise toujours un réarmement manuel.The object of the invention is to propose a new control of this type whose motorized rearming is improved and which still allows manual reset.

ART ANTERIEURPRIOR ART

Les mécanismes dits à double accrochage d'une commande d'appareillage haute ou moyenne tension présentent comme caractéristiques de fonctionnement, les phases suivantes :

  • on arme le mécanisme (on stocke de l'énergie pour effectuer les manoeuvres de fermeture et d'ouverture d'au moins un interrupteur de l'appareillage,
  • on ferme l'interrupteur en libérant une partie de l'énergie stockée dans le mécanisme (on libère un accrochage dit accrochage de fermeture),
  • on ouvre l'interrupteur en libérant le reste de l'énergie stockée (on libère l'accrochage dit accrochage d'ouverture).
The so-called dual latching mechanisms of a high or medium voltage switchgear have, as operating characteristics, the following phases:
  • the mechanism is armed (energy is stored to perform the closing and opening operations of at least one switch of the apparatus,
  • the switch is closed by releasing a part of the energy stored in the mechanism (it releases a hooking said closing hook),
  • we open the switch by releasing the rest of the stored energy (we release the hooking said opening snap).

Ainsi, les mécanismes à double accrochage permettent de stocker de l'énergie pour effectuer deux manoeuvres d'au moins un interrupteur de l'appareillage électrique qui en est muni : une manoeuvre de fermeture puis une manoeuvre d'ouverture.Thus, the double latching mechanisms can store energy to perform two operations of at least one switch of the electrical equipment which is provided with a closing maneuver and an opening maneuver.

Un type connu des mécanismes à double accrochage est celui comprenant deux ressorts en spirale, présentant typiquement une forte raideur pour l'application haute ou moyenne tension. Ils sont comprimés lors d'une manoeuvre dite « d'armement » qui peut être réalisée manuellement (avec un levier) et/ou motorisée. Les mécanismes comprenant deux ressorts à spirales coaxiaux sont privilégiés par rapport à ceux comprenant un (ou plusieurs) ressort(s) de compression du fait qu'ils permettent d'une part de concevoir un système compact et d'autre part d'obtenir une distribution d'énergie idéale puisque le couple fourni par chacun des ressorts à spirales est maximal en début de manoeuvre (lorsque le ressort est comprimé au maximum) et qu'il est toujours idéalement orienté (effort radial nul).A known type of double-hook mechanisms is that comprising two spiral springs, typically having a high stiffness for high or medium voltage application. They are compressed during a maneuver called "arming" that can be performed manually (with a lever) and / or motorized. The mechanisms comprising two coaxial coil springs are preferred over those comprising one (or more) compression spring (s) because they make it possible on the one hand to design a compact system and on the other hand to obtain a ideal energy distribution since the torque supplied by each of the spiral springs is maximal at the beginning of the maneuver (when the spring is compressed to the maximum) and that it is always ideally oriented (zero radial force).

Un tel mécanisme à double accrochage avec deux ressorts spirale à forte raideur est connu du document EP 0186171 qui divulgue une commande d'un disjoncteur haute tension dans laquelle il est prévu un ressort en spirale de fermeture 2 qui à l'état comprimé exerce un couple de torsion sur un arbre de transmission 4 sur lequel son extrémité intérieure est fixée, un ressort en spirale d'ouverture 1 qui à l'état comprimé exerce un couple de torsion sur un arbre de commande 3 sur lequel son extrémité intérieure est fixée. L'actionnement d'un moteur d'entraînement 22 met en compression le ressort de fermeture 2 par le biais d'une courroie 23. L'arbre de transmission 4 est aligné avec l'arbre de commande 3 et des moyens d'accouplement comprenant une roue étoile 6 sont agencés entre eux afin de les accoupler et ainsi permettre la fermeture du disjoncteur. Un tel accouplement permet également simultanément la compression du ressort d'ouverture 1 par le relâchement du ressort de fermeture 2. Le principal inconvénient de la commande divulguée selon ce document est que pour une énergie d'ouverture similaire à l'énergie de fermeture, il faut un ressort de fermeture 2 qui puisse emmagasiner deux fois plus d'énergie que nécessaire à la manoeuvre de fermeture proprement dite puisque le ressort d'ouverture 1 est comprimé par la détente du ressort de fermeture 2. Autrement dit, le couple nécessaire pour armer le ressort de fermeture 2 correspond à la somme des couples d'armement théoriques d'un ressort de fermeture et d'un ressort d'ouverture nécessaires uniquement pour un cycle donné fermeture/ouverture avec un fonctionnement complètement dissocié.Such a double-hook mechanism with two spiral springs with high stiffness is known from the document EP 0186171 which discloses a control of a high-voltage circuit breaker in which there is provided a closing spiral spring 2 which in the compressed state exerts a torsion torque on a transmission shaft 4 on which its inner end is fixed, a spring in opening spiral 1 which in the compressed state exerts a torsion torque on a control shaft 3 on which its inner end is fixed. The actuation of a drive motor 22 compresses the closing spring 2 by means of a belt 23. The transmission shaft 4 is aligned with the control shaft 3 and coupling means comprising a star wheel 6 are arranged between them in order to couple them and thus allow the closing of the circuit breaker. Such a coupling also simultaneously allows the compression of the opening spring 1 by the release of the closing spring 2. The main disadvantage of the control disclosed in this document is that for an opening energy similar to the closing energy, it a closing spring 2 is required which can store twice as much energy as necessary for the actual closing maneuver, since the opening spring 1 is compressed by the expansion of the closing spring 2. In other words, the torque needed to arm the closing spring 2 corresponds to the sum of the theoretical arming torques of a closing spring and an opening spring required only for a given cycle closing / opening with a completely dissociated operation.

Les contraintes normatives imposent pour ce type de commande de pouvoir réaliser un armement manuel selon un seul sens par l'intermédiaire d'un levier spécifique qui peut être enclenché depuis l'extérieur de la commande.The normative constraints require for this type of control to be able to carry out a manual arming in only one direction by means of a specific lever which can be activated from the outside of the command.

Les commandes de ce type peuvent comprendre également en option un motoréducteur en tant que moyen motorisé pour réarmer les deux ressorts de fermeture et d'ouverture lorsque ceux-ci sont à l'état relâché et qu'ils ont donc servi à réaliser une manoeuvre de fermeture et d'ouverture d'au moins un interrupteur haute ou moyenne tension.The controls of this type may also optionally include a geared motor as a motorized means for rearming the two closing and opening springs when they are in the relaxed state and that they were thus used to perform a maneuver of closing and opening at least one high or medium voltage switch.

Les inventeurs ont en outre été confrontés à une problématique supplémentaire non connue à ce jour pour ce type de commande : ils doivent concevoir une commande capable de réaliser une manoeuvre d'ouverture et de fermeture d'au moins un interrupteur haute ou moyenne tension avec un couple total d'armement simultané des deux ressorts de l'ordre de 120 N.m.The inventors have also been confronted with an additional problem that is not known to date for this type of control: they must design a control capable of making an opening and closing maneuver of at least one high or medium voltage switch with a total simultaneous arming torque of the two springs of the order of 120 Nm

Or, ils sont parvenus à la conclusion qu'aucun motoréducteur connu pour ce type de commande ne pouvait être utilisé.However, they came to the conclusion that no geared motor known for this type of control could be used.

En effet, l'encombrement disponible dans la commande de ce type est relativement limité au point de ne pouvoir implanter un motoréducteur dimensionné pour un tel couple de 120 N.m sans augmenter de manière sensible les dimensions de ladite commande. De plus, le coût d'un motoréducteur pour un tel couple apparaît rédhibitoire pour une telle commande.Indeed, the space available in the control of this type is relatively limited to the point of not being able to implement a geared motor sized for such a torque of 120 Nm without significantly increasing the dimensions of said control. In addition, the cost of a geared motor for such a torque seems prohibitive for such an order.

Enfin, il n'est pas possible d'augmenter infiniment le rapport de réduction du motoréducteur car, en plus d'augmenter le coût et l'encombrement de la motorisation, cette solution présente aussi l'inconvénient d'augmenter le temps de réarmement motorisé.Finally, it is not possible to infinitely increase the reduction ratio of the geared motor because, in addition to increasing the cost and size of the engine, this solution also has the disadvantage of increasing the motorized rearming time .

Le but de l'invention est ainsi de proposer une commande à mécanisme à double accrochage d'au moins un interrupteur à haute ou moyenne tension qui réponde aux exigences suivantes :

  • fourniture d'un couple de manoeuvre élevé, typiquement de l'ordre de 120 N.m,
  • respect des conditions normatives d'armement manuel,
  • utilisation possible d'un motoréducteur de réarmement du mécanisme à double accrochage à moindre coût,
  • encombrement restreint.
The object of the invention is thus to propose a double-snap mechanism control of at least one high or medium voltage switch that satisfies the following requirements:
  • providing a high operating torque, typically of the order of 120 Nm,
  • compliance with the normative conditions of manual arming,
  • possible use of a gearmotor for resetting the double-hook mechanism at a lower cost,
  • small footprint.

EXPOSE DE L'INVENTIONSUMMARY OF THE INVENTION

Pour ce faire, l'invention a pour objet une commande d'appareillage haute ou moyenne tension comprenant un mécanisme à double accrochage, un motoréducteur d'armement du mécanisme à double accrochage et une chaîne de transmission pour transmettre le couple de sortie du motoréducteur à un élément du mécanisme à double accrochage.To do this, the subject of the invention is a high or medium voltage switchgear control comprising a double-snap mechanism, an armature gearmotor of the double-snap mechanism and a transmission chain for transmitting the output torque of the gearmotor to an element of the double-snap mechanism.

La commande selon l'invention est telle que :

  • le mécanisme à double accrochage comprend deux ressorts en spirale dont l'un dit ressort de fermeture est apte à fermer au moins un interrupteur de l'appareillage en se relâchant depuis un état comprimé et dont l'autre dit ressort d'ouverture est apte à ouvrir l'interrupteur de l'appareillage en se relâchant depuis un état comprimé,
  • la chaîne de transmission est apte à être interrompue, ladite chaîne de transmission et le mécanisme à double accrochage étant conçus de sorte que :
    • dans l'état interrompu de la chaîne, le ressort d'ouverture et le ressort de fermeture puissent être comprimés simultanément en une seule manoeuvre manuelle,
    • dans l'état non interrompu de la chaîne, le ressort d'ouverture puisse être comprimé par le couple de sortie du motoréducteur selon un sens donné puis le ressort de fermeture puisse être comprimé par le couple de sortie du motoréducteur selon l'autre sens, le ressort d'ouverture restant comprimé dans le même état lors de la compression du ressort de fermeture.
The control according to the invention is such that:
  • the double-hook mechanism comprises two spiral springs, one of which said closing spring is able to close at least one switch of the apparatus while relaxing from a compressed state and the other said opening spring is able to open the switch of the apparatus by relaxing from a compressed state,
  • the transmission chain is capable of being interrupted, said transmission chain and the double-hook mechanism being designed so that:
    • in the interrupted state of the chain, the opening spring and the closing spring can be compressed simultaneously in a single manual operation,
    • in the uninterrupted state of the chain, the opening spring can be compressed by the output torque of the gearmotor in a given direction and then the closing spring can be compressed by the output torque of the gearmotor in the other direction, the opening spring remaining compressed in the same state during compression of the closing spring.

La commande selon l'invention permet ainsi de pouvoir manoeuvrer un interrupteur d'un appareillage haute ou moyenne tension qui nécessite un couple de manoeuvre important de l'ordre de 120 N.m.The control according to the invention thus allows to be able to operate a switch of a high or medium voltage switchgear which requires a large operating torque of the order of 120 N.m.

Avantageusement, la solution selon l'invention peut très bien s'appliquer pour des couples plus faibles et permettrait ainsi de diminuer la puissance du moteur ou motoréducteur d'un facteur 2.Advantageously, the solution according to the invention can very well be applied for weaker couples and would thus reduce the power of the motor or geared motor by a factor of 2.

L'idée de base de la solution consiste, pour une manoeuvre motorisée, à comprimer les deux ressorts l'un après l'autre à l'aide d'un même motoréducteur. Ainsi, le moteur fournit un couple deux fois moins élevé ce qui permet de diminuer son coût, ses dimensions et sa consommation de courant. Typiquement, le couple fourni par le motoréducteur est de l'ordre de 60 N.m.The basic idea of the solution consists, for a motorized maneuver, of compressing the two springs one after the other with the aid of the same gearmotor. Thus, the motor provides a couple of times lower, which reduces its cost, dimensions and power consumption. Typically, the torque supplied by the geared motor is of the order of 60 Nm

De plus, la solution présentée permet, en manoeuvre manuelle, d'armer le mécanisme en une seule manoeuvre (un seul sens de manoeuvre) et donc de comprimer les deux ressorts simultanément. La commande selon l'invention permet donc de répondre aux conditions normatives d'armement manuel.In addition, the solution presented allows, in manual operation, to arm the mechanism in a single operation (a single direction of maneuver) and thus to compress the two springs simultaneously. The control according to the invention thus makes it possible to meet the normative conditions of manual arming.

Selon un mode de réalisation préféré,

  • le mécanisme à double accrochage comprend :
    • un arbre de commande auquel sont fixées les extrémités intérieures des ressorts d'ouverture et de fermeture ; une première roue dite roue de fermeture montée libre en rotation autour de l'arbre de commande et à laquelle est fixée l'extrémité extérieure du ressort de fermeture,
    • une deuxième roue dite roue d'armement fixée autour de l'arbre de commande,
    • une troisième roue dite roue d'ouverture montée libre en rotation autour de l'arbre de commande et à laquelle est fixée l'extrémité extérieure du ressort d'ouverture,
  • la chaîne de transmission comprend :
    • un premier pignon dit pignon de fermeture,
    • un deuxième pignon dit pignon d'ouverture monté autour de l'arbre de commande et fixé à la roue d'ouverture,
    • un arbre de transmission agencé parallèlement à l'arbre de commande et comprenant à chacune de ses extrémités respectivement un troisième et un quatrième pignon de transmission dont l'un est en engrènement à la fois avec le pignon de fermeture et le pignon de sortie du motoréducteur et dont l'autre est en engrènement avec le pignon d'ouverture.
According to a preferred embodiment,
  • the double-hook mechanism comprises:
    • a control shaft to which are fixed the inner ends of the opening and closing springs; a first wheel, said closing wheel mounted free to rotate about the control shaft and to which is fixed the outer end of the closing spring,
    • a second wheel called an arming wheel fixed around the control shaft,
    • a third wheel called the opening wheel mounted free to rotate about the control shaft and to which is fixed the outer end of the opening spring,
  • the transmission chain includes:
    • a first gear pinion said pinion closure,
    • a second pinion said opening pinion mounted around the control shaft and fixed to the opening wheel,
    • a transmission shaft arranged parallel to the control shaft and comprising at each of its ends respectively a third and a fourth transmission gear, one of which meshes with both the closing gear and the output gear of the geared motor. and the other of which meshes with the opening pinion.

Selon ce mode, les rapports de réduction entre le pignon de fermeture et le troisième pignon et entre le pignon d'ouverture et le quatrième pignon de transmission sont identiques et il est prévu des moyens d'accouplement pour accoupler le pignon de fermeture et la roue d'armement uniquement après que le ressort d'ouverture ait été comprimé par le couple de sortie du motoréducteur selon un sens et que la roue d'ouverture ait été accrochée, l'accouplement entre le pignon de fermeture et la roue d'armement permettant de comprimer le ressort de fermeture par le couple de sortie du motoréducteur dans l'autre sens et d'accrocher la roue d'armement tandis que le ressort d'ouverture reste dans le même état comprimé.According to this mode, the reduction ratios between the closing pinion and the third pinion and between the opening pinion and the fourth transmission pinion are identical and coupling means are provided for coupling the pinion closure and the wheel only after the opening spring has been compressed by the output torque of the gearmotor in one direction and the opening wheel has been engaged, the coupling between the closing pinion and the arming wheel permitting compressing the closing spring by the output torque of the gearmotor in the other direction and hooking the arming wheel while the opening spring remains in the same compressed state.

Avantageusement, les moyens d'accouplement comprennent un axe fixé au pignon de fermeture et un doigt dit doigt d'armement apte à se dégager de la roue d'armement en fin de manoeuvre sous l'action de poussée de l'axe fixé au pignon de fermeture.Advantageously, the coupling means comprise an axis fixed to the closing gear and a so-called arming finger able to disengage from the arming wheel at the end of the maneuver under the thrust action of the pin fixed to the pinion. closure.

Avantageusement encore, les roues d'ouverture et de fermeture sont chacune conçues avec un évidement pour loger respectivement le ressort d'ouverture et de fermeture.Advantageously, the opening and closing wheels are each designed with a recess for respectively housing the opening and closing spring.

De préférence, le pignon de fermeture est amovible, l'interruption de la chaîne de transmission étant réalisé par enlèvement dudit pignon de fermeture. Le pignon de fermeture est ainsi remplacé par un levier d'armement manuel.Preferably, the closing pinion is removable, the interruption of the transmission chain being achieved by removal of said pinion closure. The closing pinion is thus replaced by a manual cocking lever.

Une commande particulièrement visée par l'invention est celle dans laquelle, dans l'état non interrompu de la chaîne, le motoréducteur est apte à fournir un couple de sortie d'environ 60 N.m pour comprimer chacun des deux ressorts alors que, dans l'état interrompu de la chaîne, les deux ressorts sont aptes à être comprimés simultanément avec un couple de réarmement de 120 N.m.A control particularly targeted by the invention is that in which, in the uninterrupted state of the chain, the geared motor is able to provide an output torque of about 60 Nm to compress each of the two springs while, in the interrupted state of the chain, the two springs are able to be compressed simultaneously with a rearming torque of 120 Nm

L'invention concerne également un levier d'armement manuel comprenant une partie mâle apte à être emmanché en lieu et place du pignon de fermeture de la commande décrit précédemment, et une patte qui a la même fonction que l'axe dudit pignon.The invention also relates to a manual cocking lever comprising a male portion adapted to be fitted in place of the closing pinion of the control described above, and a tab which has the same function as the axis of said pinion.

L'invention vise enfin un procédé d'armement du mécanisme, dit mécanisme à double accrochage à deux ressorts spirale, d'une commande d'appareillage électrique haute ou moyenne tension muni d'au moins un interrupteur. En fonction de l'armement souhaité (motorisé ou manuel):

  • soit le ressort spirale dit ressort de fermeture apte à fermer l'interrupteur de l'appareillage est comprimé par un motoréducteur en rotation selon un sens donné puis le ressort spirale dit ressort d'ouverture apte à ouvrir l'interrupteur de l'appareillage est comprimé par le motoréducteur en rotation selon le sens inverse tandis que le ressort de fermeture est maintenu comprimé,
  • soit le ressort d'ouverture et le ressort de fermeture sont comprimés simultanément en une seule manoeuvre manuelle.
The invention finally relates to a method of arming the mechanism, said double-spiral mechanism with two springs, of a control of high or medium voltage electrical equipment provided with at least one switch. Depending on the desired armament (motorized or manual):
  • either the spiral spring said closing spring capable of closing the switch of the apparatus is compressed by a geared motor in rotation in a given direction and the spiral spring said opening spring suitable for opening the switch of the apparatus is compressed by the geared motor rotation in the opposite direction while the closing spring is kept compressed,
  • either the opening spring and the closing spring are compressed simultaneously in a single manual operation.

BRÈVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS

D'autres caractéristiques et avantages de l'invention ressortiront mieux à la lecture de la description détaillée faite en référence aux figures suivantes dans lesquelles :

  • les figures 1 et 1A sont des vues en perspective respectivement éclatée et assemblée d'une partie d'une commande selon l'invention,
  • les figures 2A à 2E représentent les différentes phases d'armement motorisé de la commande selon les figures 1 et 1A,
  • les figures 3A à 3C représentent les différentes phases d'armement manuel de la commande selon les figures 1 et 1A.
Other features and advantages of the invention will emerge more clearly on reading the detailed description given with reference to the following figures in which:
  • the Figures 1 and 1A are perspective views respectively exploded and assembled of a part of a control according to the invention,
  • the Figures 2A to 2E represent the different phases of motorized arming of the control according to the Figures 1 and 1A ,
  • the FIGS. 3A to 3C represent the different phases of manual arming of the control according to the Figures 1 and 1A .

EXPOSÉ DÉTAILLÉ DE MODES DE RÉALISATION PARTICULIERSDETAILED PRESENTATION OF PARTICULAR EMBODIMENTS

La commande selon l'invention 1 telle que représentée comprend tout d'abord un bâti fixe non représenté et un motoréducteur dont seul le pignon de sortie 2 est représenté.The control according to the invention 1 as shown first comprises a fixed frame not shown and a geared motor which only the output gear 2 is shown.

La commande comprend en outre un mécanisme à double accrochage 3 constitué des pièces suivantes :

  • un arbre de commande 30 comprenant une gorge à l'intérieure de laquelle les pattes intérieures des ressorts à spirales 34, 35 sont insérées comme décrite ci-après. La rotation de cet arbre 30 permet donc la compression des ressorts à spirales comme expliqué ci-après,
  • une première roue dite roue de fermeture 31 montée libre en rotation autour de l'arbre de commande 30 : lors de la manoeuvre d'armement, cette roue de fermeture 31 est maintenue par un accrochage coopérant avec un décrochement 310 pratiqué à la périphérie de la roue 31, comme décrit ci-après pour ne pas modifier la position de l'interrupteur,
  • une deuxième roue dite roue d'armement 32 fixée à l'arbre de commande 30 typiquement par un système de cannelures,
  • un doigt d'armement 320 en liaison pivot avec la roue d'armement 32. Lorsqu'il est en position enclenchée avec la roue d'armement 32, il permet d'armer le mécanisme à double accrochage 3 en accouplant la roue d'armement 32 et donc l'arbre de commande 30 au motoréducteur ou au levier d'armement manuel décrit par la suite. Lorsqu'il est en position dégagée de la roue d'armement 32, il permet de débrayer le mécanisme à double accrochage du motoréducteur à la fin d'une manoeuvre d'armement (manuel ou motorisé),
  • une troisième roue dite roue d'ouverture 33 montée libre en rotation autour de l'arbre de commande 30,
  • un ressort en spirale 34 de fermeture dont l'extrémité (patte) intérieure est fixée à l'arbre de commande 30 (dans sa gorge) et dont l'extrémité (patte) extérieure est fixée à la roue de fermeture 31: son énergie permet de réaliser une manoeuvre de fermeture de l'interrupteur comme expliqué par la suite,
  • un ressort en spirale 35 d'ouverture dont l'extrémité (patte) intérieure est fixée à l'arbre de commande 30 (dans sa gorge) et dont l'extrémité (patte) extérieure est fixée à la roue d'ouverture 33 : son énergie permet de réaliser une manoeuvre d'ouverture de l'interrupteur comme expliqué par la suite,
  • une colonnette 36 fixée au bâti : elle a pour fonction de servir de butée aux différentes roues de fermeture 31, d'armement 32, d'ouverture 33 comme décrit ci-après.
The control further comprises a double hook mechanism 3 consisting of the following parts:
  • a control shaft 30 comprising a groove within which the inner lugs of the coil springs 34, 35 are inserted as described below. The rotation of this shaft 30 therefore allows the compression of the coil springs as explained below,
  • a first wheel called closing wheel 31 freely mounted in rotation about the control shaft 30: during the arming maneuver, this closing wheel 31 is held by a catch cooperating with a recess 310 made on the periphery of the wheel 31, as described below to avoid changing the position of the switch,
  • a second wheel called the cocking wheel 32 fixed to the control shaft 30 typically by a system of grooves,
  • a cocking pin 320 pivotally connected to the cocking wheel 32. When it is in the engaged position with the cocking wheel 32, it makes it possible to arm the double-hook mechanism 3 by coupling the cocking wheel 32 and therefore the control shaft 30 to the geared motor or the manual cocking lever described below. When it is in the disengaged position of the cocking wheel 32, it allows to disengage the double attachment mechanism of the gearmotor at the end of an arming maneuver (manual or motorized),
  • a third wheel called opening wheel 33 mounted free to rotate around the control shaft 30,
  • a closing spiral spring 34 whose inner end (lug) is fixed to the control shaft 30 (in its groove) and whose outer end (lug) is fixed to the closing wheel 31: its energy enables to perform a maneuver closing the switch as explained later,
  • an opening spiral spring 35 whose inner end (lug) is fixed to the control shaft 30 (in its groove) and whose outer end (lug) is fixed to the opening wheel 33: its energy makes it possible to perform an opening operation of the switch as explained later,
  • a column 36 fixed to the frame: its function is to serve as a stop for the different closing wheels 31, arming 32, opening 33 as described below.

La commande selon l'invention comprend en outre une chaîne de transmission 4 pour transmettre le mouvement de rotation du pignon de sortie 2 du motoréducteur en un mouvement de rotation à l'arbre de commande 30 et selon les différentes phases d'armement à une des roues 31, 32, 33 afin de comprimer le ressort de fermeture 34 puis le ressort d'ouverture 35.The control according to the invention further comprises a transmission chain 4 for transmitting the rotational movement of the output gear 2 of the geared motor in a rotational movement to the control shaft 30 and according to the different arming phases to one of the wheels 31, 32, 33 to compress the closing spring 34 and the opening spring 35.

La chaîne de transmission 4 est constituée des pièces suivantes :

  • un premier pignon dit pignon de fermeture 40 qui permet lorsqu'il est en engrènement avec le pignon de sortie 2 du motoréducteur d'entraîner en rotation la roue d'armement 32 seulement sur une course de rotation déterminée. En d'autres termes, le pignon de fermeture 40 est solidaire en rotation de la roue de fermeture 31 uniquement sur une course de rotation du pignon de sortie 2. Ce pignon de transmission 40 est conçu pour être amovible afin qu'il soit remplacé par un levier d'armement manuel et donc, que cela permette d'effectuer une manoeuvre manuelle d'armement comme décrit ci-après,
  • un deuxième pignon dit pignon d'ouverture 41 fixé sur la roue d'ouverture 33 : sa fonction est donc de l'entraîner en rotation comme décrit ci-après,
  • un arbre dit arbre de transmission 42 agencé parallèlement à l'arbre de commande 30. Cet arbre de transmission 42 comprend à ses extrémités un troisième et quatrième pignon 43, 44 dits pignons de transmission, ces pignons de transmission 43, 44 étant identiques entre eux. L'un des pignons de transmission 43 est en engrènement permanent avec le pignon de fermeture 40 lorsque que celui-ci est en position installée, c'est-à-dire lorsque l'armement est réalisé par le motoréducteur. L'autre des pignons de transmission 44 est en engrènement permanent avec le pignon d'ouverture 41. L'arbre 42 assure donc la transmission entre d'une part le motoréducteur (pignon de sortie 2) et le pignon de fermeture 40 et d'autre part entre le motoréducteur (pignon de sortie 2) et le pignon d'ouverture 41.
The transmission chain 4 consists of the following parts:
  • a first gear pinion closing pinion 40 which allows when in mesh with the output gear 2 of the geared motor to rotate the arming wheel 32 only on a determined rotational stroke. In other words, the closing pinion 40 is rotatably connected to the closing wheel 31 only on a rotational stroke of the output pinion 2. This transmission pinion 40 is designed to be removable so that it can be replaced by a manual arming lever and therefore, that this allows to perform a manual arming maneuver as described below,
  • a second pinion said opening pinion 41 fixed on the opening wheel 33: its function is therefore to drive it in rotation as described below,
  • a shaft said transmission shaft 42 arranged parallel to the control shaft 30. This transmission shaft 42 comprises at its ends a third and fourth gear 43, 44 said transmission pinions, these transmission gears 43, 44 being identical to each other . One of the transmission gears 43 is in permanent meshing with the closing gear 40 when the latter is in the installed position, that is to say when the arming is carried out by the geared motor. The other of the transmission gears 44 is in permanent meshing with the opening gear 41. The shaft 42 thus ensures the transmission between on the one hand the geared motor (output gear 2) and the closing pinion 40 and on the other hand, between the gearmotor (output gear 2) and the opening gear 41.

Les caractéristiques du pignon d'ouverture 41 sont identiques à celles du pignon de fermeture 40 afin que les rapports de réduction d'une part entre le pignon de fermeture 40 et arbre de transmission 42 (pignon 43) et d'autre part entre le pignon d'ouverture 41 et arbre de transmission 42 (pignon 44) soient identiques.The characteristics of the opening pinion 41 are identical to those of the closing pinion 40 so that the reduction ratios on the one hand between the closing pinion 40 and the transmission shaft 42 (pinion 43) and on the other hand between the pinion opening 41 and transmission shaft 42 (pinion 44) are identical.

Dans le mode de réalisation illustré, les ressorts en spirale 34 et 35 sont identiques.In the illustrated embodiment, the spiral springs 34 and 35 are identical.

Dans le mode de réalisation illustré lorsque le mécanisme à double accrochage est désarmé, les deux ressorts spirale 34 et 35 restent à un état comprimé ou autrement dit pré-comprimés (pré-comprimés à un niveau donné, nécessaire uniquement au fonctionnement).In the illustrated embodiment when the double latching mechanism is disarmed, both spiral springs 34 and 35 remain in a compressed state or in other words pre-compressed (pre-compressed to a given level, necessary only for operation).

Dans le mode de réalisation illustré, la roue de fermeture 31 comprend un évidement qui forme une cage dans laquelle le ressort spirale 34 de fermeture est logé. De même, la roue d'ouverture 33 est évidée et la cage ainsi constituée loge le ressort spiral 35 d'ouverture.In the illustrated embodiment, the closing wheel 31 comprises a recess which forms a cage in which the closing spiral spring 34 is housed. Similarly, the opening wheel 33 is recessed and the cage thus formed houses the spiral spring 35 opening.

Le fonctionnement d'un armement motorisé de la commande selon l'invention va maintenant être décrit.The operation of a motorized armament of the control according to the invention will now be described.

En position initiale, les deux ressorts spirales 34, 35 sont pré-comprimés et mettent ainsi en appui la roue d'armement 32, et la roue d'ouverture 33 en appui sur la colonnette 36 (figure 1A). La roue de fermeture 31 est, quant à elle, retenue par un moyen d'accrochage (non représenté) venant accrocher le décrochement 310 de la roue 31.In the initial position, the two spiral springs 34, 35 are pre-compressed and thus support the arming wheel 32, and the opening wheel 33 resting on the column 36 (FIG. Figure 1A ). The closure wheel 31 is, in turn, retained by a hooking means (not shown) coming to hook the recess 310 of the wheel 31.

La manoeuvre d'armement consiste donc à comprimer les deux ressorts en spirale 34, 35 par leur extrémité intérieure.The arming maneuver thus consists in compressing the two spiral springs 34, 35 by their inner end.

Selon l'invention, le couple total nécessaire à une manoeuvre combinée ouverture/fermeture de l'interrupteur de l'appareillage est tel qu'il est prévu un armement motorisé du ressort de fermeture 34 puis du ressort d'ouverture 35. Selon l'invention, il est donc prévu que le motoréducteur réalise la compression des deux ressorts spirales d'ouverture 35 et de fermeture 34 mais qu'il ne fournisse que le couple nécessaire à la compression d'un seul ressort 34 ou 35, soit de l'ordre de 60 N.m.According to the invention, the total torque required for a combined opening / closing operation of the switch of the apparatus is such that a motorized arming of the closing spring 34 and then of the opening spring 35 is provided. invention, it is therefore expected that the gearmotor realizes the compression of the two spiral springs 35 opening and closure 34 but that it provides only the torque required for the compression of a single spring 34 or 35, being of the order of 60 Nm

Les différentes étapes ou phases d'armement motorisé sont décrites ci-dessous en référence aux figures 2A à 2E :

  • Phase 1 ( figure 2A ) : Le pignon de sortie 2 du motoréducteur tourne dans le sens anti-horaire sur une première course de rotation. Le pignon de fermeture 40 engrène alors le pignon de transmission 43 à l'extrémité de l'arbre de transmission 42 la plus proche du pignon de sortie 2 du motoréducteur. Mais l'axe 400 fixé au pignon de transmission 40 est sur cette course de rotation libre de tout contact : le pignon de transmission 43 n'entraîne donc aucune pièce. La roue d'armement 32 et l'arbre de commande 30 auquel elle est fixée sont donc immobiles. Simultanément, la roue d'ouverture 33 est en rotation dans le même sens antihoraire par engrènement par l'intermédiaire du pignon de transmission 44 à l'extrémité de l'arbre de transmission 42 la plus éloignée du pignon de sortie 2 du motoréducteur. Le ressort en spirale d'ouverture 35 est ainsi comprimé par son extrémité extérieure puisque fixée à la roue d'ouverture 33. L'extrémité intérieure du ressort d'ouverture 35 reste quant à elle immobile car fixée à l'arbre de commande 30 immobile. Le motoréducteur fournit donc le couple (environ 60 N.m en fin de course figure 2C) pour l'armement d'un seul ressort, à savoir ici le ressort d'ouverture 35.
  • Phase 2 ( figure 2B ) : Le pignon de sortie 2 du motoréducteur continue à tourner dans le même sens anti-horaire. L'axe 400 fixé au pignon de fermeture 40 vient alors en appui sur le doigt d'armement 320 qui s'écarte pour le laisser passer. En d'autres termes, le doigt d'armement 320 vient dans sa position dégagée de la roue d'armement 32. La rotation du pignon d'ouverture 41, de la roue d'ouverture 33 qui lui est liée se poursuivent : le ressort spirale d'ouverture 35 continue alors à se comprimer.
  • Phase 3 ( figure 2C ) : Le pignon de fermeture 40 a atteint une position telle que l'axe 400 fixé audit pignon 40 a ramené le doigt d'armement 320 dans sa position engagée avec la roue d'armement 32. En d'autres termes, le doigt d'armement 320 est refermé sur l'axe 400 qui est coincé entre le doigt d'armement 320 et la roue de d'armement 32. Le motoréducteur est alors arrêté. Dans cette position d'engagement du doigt d'armement 320, l'axe 400 étant coincé, le pignon de fermeture 40 auquel il est fixé ne peut revenir en arrière car bloqué. La roue d'ouverture 33 est dans le même temps accroché par le moyen non représenté: le ressort d'ouverture 35 est donc maintenu à l'état comprimé. Dans cette phase, l'ensemble mécanique constitué par la roue d'armement 32, le pignon d'ouverture 41, l'arbre traversant 42 avec ses pignons 43, 44 et la roue d'ouverture 33 accrochée est donc équivalent à un ensemble mécanique rigide. Il n'engendre donc aucun couple résistant sur le motoréducteur.
    Au cours des phases 1 à 3 (figure 2A à 2C), la roue de fermeture 31 n'a subi aucune rotation, elle reste toujours en appui contre la colonnette 36. Le ressort de fermeture 34 fixé à la roue de fermeture 31 n'a donc subi aucune compression supplémentaire.
  • Phase 4 ( figure 2D ) : Le sens de rotation du motoréducteur est inversé : le pignon de sortie 2 du motoréducteur tourne alors dans le sens horaire. L'ensemble mécanique cité précédemment (roue d'armement 32, le pignon d'ouverture 41, l'arbre traversant 42 avec ses pignons 43, 44 et la roue d'ouverture 33 accrochée) reste rigide, le ressort d'ouverture 35 est donc maintenu comprimé. De plus, du fait des rapports de réduction identiques entre le pignon de fermeture 40 et l'arbre de transmission 42 (pignon 43) et entre le pignon d'ouverture 41 et l'arbre de transmission 42 (pignon 44), la compression du ressort d'ouverture 35 n'est pas modifiée par cette inversion du sens de rotation du motoréducteur. La rotation du motoréducteur dans le sens horaire entraîne donc la rotation dans le même sens de la roue de fermeture 31 et donc de l'arbre de commande 30 auquel elle est fixée. Le ressort de fermeture 34 dont l'extrémité intérieure est fixée à l'arbre de commande 30 est alors comprimé car l'autre extrémité (extrémité extérieure) fixée à la roue de fermeture 31 est immobile, cette dernière étant accrochée par un moyen d'accrochage approprié non représenté.
    Au cours de cette phase, le motoréducteur fournit donc encore uniquement le couple nécessaire pour n'armer qu'un seul ressort, le ressort de fermeture 34 (environ 60 N.m en fin de réarmement).
  • Phase 5 ( figure 2 E) : Un système (non représenté) permet de dégager le doigt d'armement 320 de la roue d'armement 32 et donc, de débrayer ou autrement dit désaccoupler le pignon de fermeture 40 de la roue d'armement 32. Par ailleurs, la roue d'ouverture 33 est dans cette position en appui sur la colonnette 36. La roue d'armement 32 est alors quant à elle arrêtée en rotation par un système d'accrochage (non représenté) qui s'est mis en place automatiquement en fin de manoeuvre d'armement.
The various stages or phases of motorized armament are described below with reference to the Figures 2A to 2E :
  • Phase 1 ( Figure 2A ) : The output gear 2 of the gearmotor rotates counter-clockwise on a first rotational stroke. The closing pinion 40 then meshes with the transmission pinion 43 at the end of the transmission shaft 42 closest to the output pinion 2 of the geared motor. But the axis 400 attached to the transmission pinion 40 is on this free rotation stroke of any contact: the transmission pinion 43 therefore causes no part. The arming wheel 32 and the control shaft 30 to which it is attached are therefore immobile. Simultaneously, the opening wheel 33 is rotated in the same counterclockwise direction by meshing via the transmission gear 44 at the end of the transmission shaft 42 farthest from the output gear 2 of the geared motor. The spiral spring opening 35 is thus compressed by its outer end as fixed to the opening wheel 33. The inner end of the opening spring 35 remains stationary as it is fixed to the control shaft 30 immobile. . The geared motor thus provides the torque (about 60 Nm at the end of the race Figure 2C ) for the arming of a single spring, namely here the opening spring 35.
  • Phase 2 ( Figure 2B ) : The output gear 2 of the gearmotor continues to rotate in the same anti-clockwise direction. The axis 400 fixed to the closing pinion 40 then bears on the cocking finger 320 which moves apart to let it pass. In other words, the cocking pin 320 comes into its disengaged position from the cocking wheel 32. The rotation of the opening pinion 41, the opening wheel 33 which is connected thereto continues: the spring Opening spiral 35 then continues to compress.
  • Phase 3 ( Figure 2C ) : The closing pinion 40 has reached a position such that the pin 400 fixed to said pinion 40 has brought the cocking pin 320 into its engaged position with the cocking wheel 32. In other words, the pin arming 320 is closed on the axis 400 which is wedged between the cocking pin 320 and the cocking wheel 32. The geared motor is then stopped. In this position of engagement of the cocking finger 320, the axis 400 being jammed, the closing gear 40 to which it is attached can not return back because blocked. The opening wheel 33 is at the same time hooked by the means not shown: the opening spring 35 is thus maintained in the compressed state. In this phase, the mechanical assembly constituted by the arming wheel 32, the opening gear 41, the traversing shaft 42 with its pinions 43, 44 and the opening wheel 33 hooked is therefore equivalent to a mechanical assembly rigid. It does not generate any resisting torque on the geared motor.
    During Phases 1 to 3 ( FIGS. 2A to 2C ), the closing wheel 31 has not undergone any rotation, it always remains in abutment against the baluster 36. The closing spring 34 fixed to the closing wheel 31 has therefore not undergone any additional compression.
  • Phase 4 ( 2D figure ) : The direction of rotation of the gearmotor is reversed: the output gear 2 of the gearmotor rotates clockwise. The aforementioned mechanical assembly (arming wheel 32, the opening pinion 41, the traversing shaft 42 with its pinions 43, 44 and the opening wheel 33 hooked) remains rigid, the opening spring 35 is therefore kept compressed. In addition, because of identical reduction ratios between the closing pinion 40 and the transmission shaft 42 (pinion 43) and between the pinion 41 and the transmission shaft 42 (pinion 44), the compression opening spring 35 is not modified by this inversion of the direction of rotation of the geared motor. The rotation of the geared motor in the clockwise direction therefore causes rotation in the same direction of the closing wheel 31 and therefore of the control shaft 30 to which it is attached. The closing spring 34 whose inner end is fixed to the control shaft 30 is then compressed because the other end (outer end) fixed to the closing wheel 31 is stationary, the latter being hooked by means of appropriate hooking not shown.
    During this phase, the geared motor still provides only the necessary torque to arm only one spring, the closing spring 34 (about 60 Nm at the end of rearming).
  • Phase 5 ( Figure 2 E) A system (not shown) makes it possible to disengage the cocking finger 320 from the cocking wheel 32 and thus to disengage or otherwise disengage the closing pinion 40 from the cocking wheel 32. Moreover, the wheel opening 33 is in this position bearing on the column 36. The arming wheel 32 is then rotated by a locking system (not shown) which was set up automatically at the end of armament maneuver.

Le mécanisme à double accrochage 3 est donc maintenant en position armée, les deux ressorts spirale respectivement d'ouverture 35 et de fermeture 34 étant comprimés et le pignon d'ouverture 40 étant libre.The double latching mechanism 3 is now in the armed position, the two spiral springs respectively opening 35 and closure 34 being compressed and the opening pinion 40 being free.

Un cycle ou manoeuvre de fermeture/ouverture de la commande peut alors être effectué. Cette manoeuvre se réalise comme usuellement :

  • libération de l'accrochage de la roue de fermeture 31, ce qui libère l'énergie du ressort de fermeture 34 et donc provoque la rotation de la roue de fermeture et donc la fermeture de l'interrupteur de l'appareillage,
  • libération de l'accrochage de la roue d'armement 32, ce qui libère l'énergie du ressort d'ouverture 35 et donc provoque la rotation de l'arbre de commande 30 tout en maintenant la roue d'ouverture 33 immobile. La rotation de la roue d'armement 32 (liée à l'arbre de commande 30) va également entraîner la roue de fermeture 31 de manière à ouvrir l'interrupteur,
A cycle or maneuver closing / opening the command can then be performed. This maneuver is realized as usual:
  • release of the fastening of the closing wheel 31, which releases the energy of the closing spring 34 and thus causes the rotation of the closing wheel and thus the closing of the switch of the apparatus,
  • release of the hooking of the cocking wheel 32, which releases the energy of the opening spring 35 and therefore causes the rotation of the control shaft 30 while keeping the opening wheel 33 stationary. The rotation of the arming wheel 32 (linked to the control shaft 30) will also cause the closing wheel 31 to open the switch,

A la fin d'un cycle de fermeture/ouverture, les roues de fermeture 31, d'armement 32 et d'ouverture 33 sont ramenées dans leur position initiale (figure 1A) et les ressorts 34, 35 sont désarmés.At the end of a closing / opening cycle, the closing wheels 31, arming 32 and opening 33 are returned to their initial position ( Figure 1A ) and the springs 34, 35 are disarmed.

La manoeuvre d'ouverture/ fermeture peut être réalisée classiquement soit manuellement à l'aide d'un bouton poussoir soit automatiquement, en cas de défaut électrique détecté sur la ligne électrique sur laquelle l'appareillage électrique muni de la commande est implanté, sous l'action d'une bobine électrique de déclenchement.The opening / closing operation can be carried out conventionally either manually by means of a push button or automatically, in the event of an electrical fault detected on the electrical line on which the electrical equipment provided with the control is implanted, under the action of an electric trip coil.

Comme dit en préambule, la commande selon l'invention 1 répond aux conditions normatives qui imposent un armement manuel des deux ressorts spirales 34 et 35 avec un levier depuis l'extérieur de la commande et selon un seul sens de rotation.As said in the preamble, the control according to the invention 1 meets the normative conditions which impose a manual arming of the two spiral springs 34 and 35 with a lever from outside the control and in a single direction of rotation.

Les différentes phases d'armement manuel sont décrites ci-dessous en référence aux figures 3A à 3C. Par souci de clarté, le motoréducteur ainsi que les différentes pièces de la chaîne de transmission 4 décrits ci-avant ne sont pas représentées.The different phases of manual arming are described below with reference to FIGS. 3A to 3C . For the sake of clarity, the geared motor and the various parts of the transmission chain 4 described above are not shown.

Le mécanisme à double accrochage 3 est initialement désarmé et les différentes pièces du mécanisme 3 se retrouvent dans la position de la figure 1A.

  • P hase 1 ( figure 3A ) : Le pignon de fermeture 40 étant amovible, il est au préalable enlevé de l'extrémité de l'arbre de commande 30 dans laquelle il est emmanché.
The double hook mechanism 3 is initially disarmed and the various parts of the mechanism 3 are found in the position of the Figure 1A .
  • P hase 1 ( figure 3A ) : The closing pinion 40 being removable, it is previously removed from the end of the control shaft 30 in which it is fitted.

Un opérateur insère alors un levier 5 spécifiquement dédié à l'armement manuel.An operator then inserts a lever 5 specifically dedicated to manual arming.

Le levier 5 comprend une partie mâle 50 qui vient s'emmancher en lieu et place du pignon de fermeture 40 et une patte 500 qui a la même fonction que l'axe 400 du pignon de transmission 40. La patte 500 est ainsi coincée entre le doigt d'armement 320 et la roue de d'armement 32. Autrement dit, le doigt d'armement 320 est refermé sur la patte 500.The lever 5 comprises a male part 50 which is engaged in place of the closing pinion 40 and a tab 500 which has the same function as the axis 400 of the transmission pinion 40. The tab 500 is thus wedged between the arming finger 320 and the arming wheel 32. In other words, the arming finger 320 is closed on the leg 500.

La roue de fermeture 31 est accrochée par son décrochement 310 et maintenue en position.The closure wheel 31 is hooked by its recess 310 and held in position.

La roue d'ouverture 33 est quant à elle en appui sur la colonnette 36.
Phase 2 ( figure 3B ) : L'opérateur tourne dans le sens horaire le levier 5 qui est en appui sur le doigt d'armement 320 et coincé entre celui-ci et la roue d'armement 32 : la roue d'armement 32 est alors entraînée en rotation.The opening wheel 33 is in turn resting on the column 36.
Phase 2 ( figure 3B ) : The operator rotates clockwise lever 5 which is supported on the cocking pin 320 and wedged between it and the cocking wheel 32: the cocking wheel 32 is then rotated.

La roue d'armement 32 étant liée en rotation à l'arbre de commande 30 et les roues respectivement de fermeture 31 et d'ouverture 33 étant bloquées en rotation (la première 31 par l'accrochage et l'autre 33 par son appui sur la colonnette 36), les deux ressorts en spirale respectivement d'ouverture 35 et de fermeture 34 sont alors comprimés simultanément par leur extrémité intérieure puisque fixée à l'arbre de commande 30. En fin d'armement, la roue d'armement 32 est accrochée par le moyen d'accrochage non représenté : les deux ressorts respectivement d'ouverture 35 et de fermeture 34 sont ainsi comprimés (couple total de 120 N.m) et maintenus dans cet état. Le mécanisme à double accrochage 3 a donc été armé manuellement.The cocking wheel 32 is rotatably connected to the control shaft 30 and the respective closing and opening wheels 33 being locked in rotation (the first 31 by the hooking and the other 33 by its support on the column 36), the two spiral springs respectively opening 35 and closure 34 are then compressed simultaneously by their inner end as fixed to the control shaft 30. At the end of arming, the arming wheel 32 is hooked by the attachment means not shown: the two respectively aperture spring 35 and closure 34 are compressed (total torque 120 Nm) and maintained in this state. The double latching mechanism 3 has therefore been manually armed.

Phase 3 ( figure 3C ) : Avant de pouvoir réaliser un cycle d'ouverture /fermeture, tout comme l'armement motorisé, un débrayage ou désaccouplement entre le levier 5 d'armement et la commande 1 est réalisé. Phase 3 ( figure 3C ) : Before an opening / closing cycle can be carried out, just like the motorized armament, a disengagement or disengagement between the arming lever 5 and the command 1 is carried out.

Ce débrayage est réalisé en fin d'armement manuel, c'est-à-dire après accrochage de la roue d'armement 32.This clutch is made at the end of manual arming, that is to say after hooking of the arming wheel 32.

L'opérateur continue à tourner le levier 5 d'armement dans le sens horaire, ce qui provoque le dégagement du doigt d'armement 320 de la roue d'armement 32 sous l'action de poussée de l'axe 500.The operator continues to turn the cocking lever 5 clockwise, which causes the release of the cocking finger 320 of the cocking wheel 32 under the thrust action of the axis 500.

Le levier 5 peut alors être libéré en le désemmanchant de l'extrémité 301 de l'arbre de commande 30.The lever 5 can then be released by disengaging it from the end 301 of the control shaft 30.

L'avantage d'un tel moyen de débrayage 500, 320 est qu'en cas de maintien du levier 5 par l'opérateur dans la commande 1 et de déclenchement d'une manoeuvre de fermeture/ouverture, aucun mouvement de rotation du levier 5 ou aucun choc sur celui-ci ne se produit. En effet, la rotation de la roue d'armement 32 au cours d'un tel cycle provoque nécessairement le dégagement du doigt d'armement 320 sous l'action de poussée de la patte 500.The advantage of such disengaging means 500, 320 is that in the case of holding the lever 5 by the operator in the control 1 and triggering a closing / opening maneuver, no movement of rotation of the lever 5 or no shock on it occurs. Indeed, the rotation of the cocking wheel 32 during such a cycle necessarily causes the release of the cocking finger 320 under the pushing action of the leg 500.

La commande selon l'invention qui vient d'être décrite présente de nombreux avantages par rapport aux commandes avec mécanisme à double accrochage selon l'état de l'art :

  • pour un cycle complet d'armement motorisé, le motoréducteur de la commande n'a à fournir que le couple nécessaire pour armer un seul ressort (ressort d'ouverture puis ressort de fermeture dans le mode de réalisation illustré),
  • baisse significative du coût du motoréducteur, de sa consommation en courant mais aussi de son encombrement,
  • faisabilité technique de la commande d'appareillage haute ou moyenne tension plus simple avec des contraintes mécaniques moindres.
The control according to the invention which has just been described has numerous advantages over the controls with a double latching mechanism according to the state of the art:
  • for a complete motorized arming cycle, the geared motor of the control only has to provide the necessary torque to arm a single spring (opening spring then closing spring in the illustrated embodiment),
  • Significant reduction in the cost of the geared motor, its current consumption but also its size,
  • technical feasibility of the control of high or low voltage equipment with simpler mechanical constraints.

Claims (7)

  1. A control device (1) for high or medium voltage switchgear apparatus including a double latch mechanism (3), a motor and gearbox unit for loading the double latch mechanism, and a drive train (4) for transmitting the output torque of the motor and gearbox unit to an element (30) of the double latch mechanism, wherein:
    - the double latch mechanism comprises two spiral springs (34, 35), one of which, referred to as the closing spring (34), is adapted to close at least one interrupter of the apparatus by expanding from a compressed state, the other one, referred to as the opening spring (35), being adapted to open the interrupter of the apparatus by expanding from a compressed state; and
    - the drive train (4) is adapted to be interrupted, characterized in that said drive train and the double latch mechanism (3) are so designed that:
    • in the interrupted state of the drive train the opening spring (35) and the closing spring (34) are able to be compressed simultaneously in a single manual operation;
    • in the uninterrupted state of the drive train, the opening spring (35) is able to be compressed by the output torque of the motor and gearbox unit in a given direction, and the closing spring (34) is able then to be compressed by the output torque of the motor and gearbox unit in the other direction, the opening spring (35) remaining compressed in the same state during compression of the closing spring (34).
  2. A control device according to claim 1, wherein:
    - the double latch mechanism (3) comprises:
    • a control shaft (30) to which the inner ends of the opening spring (35) and closing spring (34) are fixed;
    • a first wheel, referred to as the closing wheel (31), mounted for free rotation about the control shaft, the outer end of the closing spring (34) being fixed to the closing wheel;
    • a second wheel, referred to as the loading wheel (32), fixed around the control shaft; and
    • a third wheel, referred to as the opening wheel, mounted for free rotation about the control shaft, the outer end of the opening spring (35) being fixed to the opening wheel;
    - the drive train comprises:
    • a first gearwheel, referred to as the closing gearwheel (40);
    • a second gearwheel, referred to as the opening gearwheel (41), which is mounted around the control shaft (30) and fixed to the opening wheel (33); and
    • a transmission shaft (42) arranged parallel to the control shaft and comprising, at each of its ends respectively, a transmission third gearwheel (43) and a transmission fourth gearwheel (44), one of which is in mesh with both the closing gearwheel and the output gearwheel (2) of the motor and gearbox unit, with the other one of said third and fourth gearwheels being in mesh with the opening gearwheel;
    wherein the reduction ratios between the closing gearwheel (40) and the third gearwheel (43), and between the opening gearwheel (41) and the transmission fourth gearwheel (44), are identical; and
    wherein coupling means (400, 320) are provided for coupling the closing gearwheel (40) and the loading wheel (32) together, but only after the opening spring (35) has been compressed by the output torque of the motor and gearbox unit acting in one direction, and after the opening wheel (33) has been latched, the coupling between the closing gearwheel (40) and the loading wheel (32) being adapted to enable the closing spring to be compressed by the output torque of the motor and gearbox unit acting in the other direction, and to enable the loading wheel to be latched, while the opening spring remains in the compressed state.
  3. A control device (1) according to claim 2, wherein the coupling means comprise a pin (400) fixed to the closing gearwheel (40), together with a finger, referred to as the loading finger (320), that is adapted to be disengaged from the loading wheel at the end of its operation, by the thrust exerted by the pin fixed to the closing gearwheel.
  4. A control device (1) according to claim 2 or claim 3, wherein the opening wheel (33) and closing wheel (31) are each designed with a recess in which the opening spring (35) and the closing spring (34), respectively, are engaged.
  5. A control device (1) according to any one of claims 2 to 4, wherein the closing gearwheel is removable, interruption of the drive train being effected by removal of said closing gearwheel.
  6. A control device (1) according to any preceding claim, wherein the motor and gearbox unit is adapted to give an output torque of about 60 Nm for compressing each of the two springs, whereas performing the operation manually requires a reloading torque of 120 Nm for compressing the two springs simultaneously.
  7. A method of loading the mechanism referred to as the double latch mechanism, having two spiral springs, of a control device for high or medium voltage switchgear apparatus according to claim 1 having at least one interrupter, wherein:
    - either the spiral spring referred to as the closing spring (34), adapted to close the interrupter of the apparatus, is compressed by a motor and gearbox unit rotating in a given direction, and the spiral spring referred to as the opening spring (35), which is adapted to open the interrupter of the apparatus, is then compressed by the motor and gearbox unit rotating in the reverse direction while the closing spring is held compressed;
    - or the opening spring (35) and the closing spring (34) are compressed simultaneously by a single manual operation.
EP09176296A 2008-11-20 2009-11-18 Control of high- or medium-voltage electrical switchgear with improved double latching and associated arming method Not-in-force EP2189995B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0857898A FR2938692B1 (en) 2008-11-20 2008-11-20 CONTROL OF HIGH OR MEDIUM VOLTAGE ELECTRICAL EQUIPMENT WITH IMPROVED DUAL - COUPLING MECHANISM AND ASSOCIATED ARMING METHOD.

Publications (3)

Publication Number Publication Date
EP2189995A2 EP2189995A2 (en) 2010-05-26
EP2189995A3 EP2189995A3 (en) 2010-06-23
EP2189995B1 true EP2189995B1 (en) 2012-02-08

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EP (1) EP2189995B1 (en)
AT (1) ATE545143T1 (en)
ES (1) ES2379218T3 (en)
FR (1) FR2938692B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9472359B2 (en) 2014-04-24 2016-10-18 Eaton Corporation Trip latch assemblies for circuit breakers and related circuit breakers
US9373456B2 (en) 2014-04-24 2016-06-21 Eaton Corporation Circuit breakers with clock spring drives and/or multi-lobe drive cams and related actuators and methods
FR3089049B1 (en) * 2018-11-26 2020-11-06 Schneider Electric Ind Sas MECHANISM FOR THE CLOSING AND OPENING COMMAND OF A POWER-CUTTING DEVICE FOR SWITCHES
FR3116149A1 (en) * 2020-11-10 2022-05-13 Schneider Electric Industries Sas Switchgear control gear motor assembly with removable safety element

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE449146B (en) * 1984-12-28 1987-04-06 Asea Ab MANOVERDON FOR POWER SWITCH
US4578551A (en) * 1985-04-10 1986-03-25 S&C Electric Company Operating mechanism for electrical switches

Also Published As

Publication number Publication date
EP2189995A3 (en) 2010-06-23
FR2938692B1 (en) 2010-12-24
ATE545143T1 (en) 2012-02-15
FR2938692A1 (en) 2010-05-21
EP2189995A2 (en) 2010-05-26
ES2379218T3 (en) 2012-04-23

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