EP2887372A1 - Mechanical switching arrangement suitable for controlling high-voltage electrical contacts - Google Patents

Abstract

The present invention describes a mechanical switching arrangement suitable for controlling metal-clad high voltage electrical contacts comprising:
- a guide rail (RG) on which an anchor point (PA) moves under a first stroke (Co1);
the first stroke (Co1) is defined by a first and a second contactor (C1, C2) arranged at the edge of the guide rail and ensuring a first and a second point of contact with the anchor point at the ends of the first race (Co1);
said first and second contactors (C1, C2) respectively have an open or closed mechanical switching mode of an electrical contact control; characterized in that
- As an extension of the first race (Co1), the guide rail (RG) comprises a second race (Co2) under which the anchor point (PA) moves between the second contactor (C2) and a third contactor (C3) );
- The third contactor (C3) is disposed at the edge of the guide rail and provides a third point of contact between the anchor point and the third contactor (C3).

Description

The present invention relates to a mechanical switching arrangement capable of controlling metal-clad high voltage electrical contacts according to the preamble of claim 1.

Metal Enclosed Substations (or G as I nsulated Substation in English, commonly referred to as GIS terminology) include electrical breaking elements adapted to disjunct or power high voltage power grids. These electrical breaking elements are controlled by modules comprising at least one metal-enclosed switching arrangement also known as disconnectors.

• une première fonction dite de sectionneur, permettant de connecter ou de séparer, au moyen du contact mobile 110, des premier et deuxième connecteurs (30, 40) ;
• une seconde fonction dite de sectionneur de terre, permettant de relier, au moyen du contact mobile 120, le premier et le troisième connecteur (30, 50), ledit troisième connecteur (50) étant relié à l'enveloppe (300) et donc à la masse (ou à la terre), cette fonction assurant ainsi la mise à la terre du premier connecteur (30).

Such a referenced arrangement is described by WO2010-149482 having a mechanical switching means having three possible positions defined by two types of disconnector functionality:

• a first function called disconnector, for connecting or separating, by means of the movable contact 110, first and second connectors (30, 40);
• a second function called an earthing switch, making it possible to connect, by means of the movable contact 120, the first and third connectors (30, 50), said third connector (50) being connected to the envelope (300) and therefore to the ground (or earth), this function thus ensuring the grounding of the first connector (30).

• 1^ière position 1 (1^er mode de commutation) : sectionneur de terre fermé et sectionneur ouvert, avec le premier connecteur (30) à la fois mis à la terre et isolé du deuxième connecteur (40) ;
• 2^ième position 2 (3ième mode de commutation) : sectionneur de terre ouvert et sectionneur ouvert, les trois connecteurs (50, 30, 40) sont isolés entre eux ;
• 3^ième position 3 (2ième mode de commutation) : sectionneur de terre ouvert et sectionneur fermé, avec les premier et deuxième connecteurs (30, 40) connectés électriquement.

According to these two functionalities, the three switching modes allow establishment of the three operating positions of the switch according to the following positioning scheme:

• 1 ^st position 1 ⁽¹ mode switching): earthing disconnector open and closed, with the first connector (30) both grounded and isolated from the second connector (40);
• 2 ^nd position 2 (3rd switching mode): open earthing switch and open disconnector, the three connectors (50, 30, 40) are isolated from each other;
• 3 ^rd position 3 (2nd switching mode): earthing switch open and closed, with the first and second connectors (30, 40) electrically connected.

A control mechanism of the switch thus passes successively from position 1 to position 2, then from position 2 to position 3, and vice versa. This type of mechanism is available in a wide variety of mechanical switching arrangements, such as by means of actuators of multiple rods according to diagrams respecting the passages described between the positions 1, 2, 3.

• un rail de guidage sur lequel un point d'ancrage se déplace sous une première course;
• le point d'ancrage a deux fonctions potentielles, la première étant de créer un contact électrique initiant un mode de commutation « ON/OFF » et/ou la seconde étant de permettre de manoeuvrer un actionneur de commutation ;
• la première course est définie par un premier et un deuxième contacteurs disposés en bordure du rail de guidage et assurant un premier et un deuxième points de contact avec le point d'ancrage aux extrémités de la première course ;
• les dits premier et deuxième contacteurs présentent respectivement un mode de commutation mécanique ouvert ou fermé d'une commande de contacts électriques haute tension (à connecter ou à déconnecter).

Also, there are also simpler mechanical switching arrangements at two positions instead of three as previously described. Such a two-position mechanical switching arrangement suitable for the control of metal-clad high voltage electrical contacts comprises:

• a guide rail on which an anchor point moves under a first stroke;
• the anchor point has two potential functions, the first being to create an electrical contact initiating a switching mode "ON / OFF" and / or the second being to allow to operate a switching actuator;
• the first race is defined by a first and a second contactor arranged at the edge of the guide rail and providing first and second points of contact with the anchor point at the ends of the first race;
• said first and second contactors respectively present an open or closed mechanical switching mode of a high-voltage electrical contact control (to be connected or disconnected).

There are therefore strong disparities between the various types of two and three-position mechanical switching arrangements, which makes their manufacture, operation and maintenance complex. In addition, depending on the types of high-voltage metal-enclosed installation, in particular the two-position switching arrangements do not have the same dimensions, actuation movements, switching forces and speeds.

A main object of the invention is therefore to provide a mechanical switching arrangement adapted to the control of high voltage electrical contacts in a metal envelope for universalizing in the same configuration arrangements in two and three positions.

The invention thus proposes a mechanical switching arrangement suitable for controlling metal-clad high voltage electrical contacts according to claim 1.

Figure 1 :

Schéma de principe d'un arrangement de commutation mécanique selon l'invention,

Figure 2 :

Principe d'opération manuelle de l'arrangement de commutation selon l'invention,

Figure 3 :

Principe d'opération électrique de l'arrangement de commutation selon l'invention.

A set of sub-claims also has advantages of the invention and are more fully described through the exemplary embodiments provided with the aid of the figures described:

Figure 1 :

Schematic diagram of a mechanical switching arrangement according to the invention,

Figure 2:

Principle of manual operation of the switching arrangement according to the invention,

Figure 3:

Principle of electrical operation of the switching arrangement according to the invention.

• un rail de guidage (RG) sur lequel un point d'ancrage (PA) se déplace sous une première course (Co1) ;
• la première course (Co1) est définie par un premier et un deuxième contacteurs (C1, C2) disposés en bordure du rail de guidage et assurant un premier et un deuxième points de contact avec le point d'ancrage aux extrémités de la première course (Co1) ;
• les dits premier et deuxième contacteurs (C1, C2) présentent respectivement un mode de commutation mécanique ouvert ou fermé d'une commande de contacts électriques.

Figure 1 has a mechanical switching arrangement according to the invention suitable for controlling metal-clad high voltage electrical contacts comprising:

• a guide rail (RG) on which an anchor point (PA) moves under a first stroke (Co1);
• the first stroke (Co1) is defined by a first and a second contactor (C1, C2) disposed at the edge of the guide rail and providing a first and a second point of contact with the anchor point at the ends of the first race ( Co1);
• said first and second contactors (C1, C2) respectively have an open or closed mechanical switching mode of an electrical contact control.

This arrangement is thus in accordance with a two-position switching arrangement (connection by contact of the anchor point on contactor C1 or contact disconnection of the anchor point on contactor C2) as described in the introductory part of the present application. patent.

The anchoring point and its positioning conditions / controls electrically and / or mechanically the acts of switching of the desired electrical contacts in a high-voltage installation.

• en prolongement de la première course (Co1), le rail de guidage (RG) comprend une deuxième course (Co2) sous laquelle le point d'ancrage (PA) se déplace entre le deuxième contacteur (C2) et un troisième contacteur (C3);
• le troisième contacteur (C3) est disposé en bordure du rail de guidage et assure un troisième point de contact entre le point d'ancrage et le troisième contacteur (C3).

In addition, the arrangement provides that:

• in extension of the first race (Co1), the guide rail (RG) comprises a second race (Co2) under which the anchor point (PA) moves between the second contactor (C2) and a third contactor (C3) ;
• the third contactor (C3) is disposed at the edge of the guide rail and provides a third point of contact between the anchor point and the third contactor (C3).

• position 1 : connexion d'un sectionneur de terre (mise à la terre « Earthing swith » ES, voir figures 2 et 3) par contact du point d'ancrage sur contacteur C1 avec déconnection garantie d'un sectionneur (connecteur d'une phase « Disconnector » DS, voir figures 2 et 3) par non-contact du point d'ancrage sur contacteur C3 ;
• position 2 : déconnections garanties du sectionneur de terre et du sectionneur par contact du point d'ancrage sur contacteur C2, car aucun contact du point d'ancrage sur contacteurs C1, C3 ;
• position 3 : déconnection du sectionneur de terre par non-contact du point d'ancrage sur contacteur C1 et connexion du sectionneur par contact du point d'ancrage sur contacteur C3.

In this way, it is thus possible to allow a three-position mechanical switching on the same initial platform as the two-position switching arrangement. Indeed, by referring to the three positions 1, 2, 3 described in the introductory part of the present patent application, the proposed arrangement makes it possible to obtain:

• position 1: connection of an earthing switch (earthing Earthing swith ES, see figures 2 and 3 ) by contact of the anchor point on contactor C1 with disconnection guaranteed of a disconnector (connector of a phase "Disconnector" DS, see figures 2 and 3 ) by non-contact of the anchor point on contactor C3;
• position 2: Guaranteed disconnections of the earthing switch and the disconnector by contact of the anchor point on contactor C2, because no contact of the anchor point on contactors C1, C3;
• position 3: disconnection of the earthing switch by non-contact of the anchor point on contactor C1 and connection of the disconnector by contact of the anchor point on contactor C3.

This control mechanism of the switch thus passes successively from position 1 to position 2, then from position 2 to position 3, and vice versa.

Thus, from a two-position mechanical switching configuration (C1 / C2), the proposed arrangement is easily adaptable to a three-position mechanical switching configuration (C1 / C2 / C3), thus making it universal.

In order to better guarantee the direction of passage and the contact of the anchor point on the contactors, in particular the second contactor C2 guaranteeing the disconnection of the earthing switch and the disconnector, for a configuration to three positions, the arrangement according to the invention provide a fourth contactor (C4) disposed near the second contactor (C2), ideally the second and fourth contactors being aligned vis-à-vis each side of the guide rail. In this way, the second contactor C2 indicates the disconnection guarantee of the earthing switch and the fourth contactor C4 separately indicates the disconnection guarantee of the disconnector. There is no longer any ambiguity about the disconnection guarantee of one or both disconnectors (earth ES / DS phase).

The arrangement according to the invention ideally provides that the guide rail is embodied by an oblong opening of a simple support on which the contactors are arranged in pairs (C1, C2, C3, C4) on either side of said rail . Thus, the size of the support and the locations of the contactors can be simply defined according to the characteristics of the high voltage installations.

In a simple manner, the arrangement according to the invention can provide that the guide rail comprises sliding means, such as a worm, electrically controllable and / or manually. Figures 1, 2 and 3 do not represent motorization elements for the sake of clarity, but they are coupled to the guide rail to move the anchor point between the different contactors. Between a motor unit and the drive shaft of a worm as a guide rail, gear blocks (for example to obtain a speed reducing effect or torque) are positionable so it is also easy to adapt the forces and speeds of movement of the anchor point to the desired mechanical and electrical switching.

• une commande de mise à la terre liée au premier contacteur (C1), une fois que le point d'ancrage a indiqué son départ du troisième contacteur (C3), puis son passage et contact au deuxième contacteur (C2) afin d'atteindre et de venir finalement en contact avec le premier contacteur (C1) ;
• une commande de connexion liée au troisième contacteur (C3), une fois que le point d'ancrage a indiqué son départ du premier contacteur (C1), puis son passage et contact au deuxième contacteur (C2) afin d'atteindre et de venir finalement en contact avec le troisième contacteur (C3) .

Advantageously, and in particular if a manual operation or an electric reset of the anchor point displacement is required, the arrangement according to the invention provides a means called interlocking (MI) being coupled to the guide rail to allow :

• an earthing command connected to the first contactor (C1), once the anchor point has indicated its departure from the third contactor (C3), then its passage and contact to the second contactor (C2) in order to reach and finally coming into contact with the first contactor (C1);
• a connection command linked to the third contactor (C3), once the anchor point has indicated its departure from the first contactor (C1), then its passage and contact to the second contactor (C2) in order to reach and finally come in contact with the third contactor (C3).

In this way, the interlocking means only allows permissible passages between positions 1, 2 and 3 described above, even if an operator can not know the last position occupied by the anchor point and thus the connection / disconnection states. earth and phase disconnectors. Generally, the interlocking means is thus manually activatable, in addition to an electrical module for moving the anchor point (PA), in particular in the event of failure of said electrical module or maintenance of the manual type.

In the case of a manual operation, the interlocking means is manually activatable by at least one plug-in key in two locks, each of the locks being accessible by opening a shutter (D1, D2), said opening being controlled by the interlocking means. Thus, depending on the open or closed position of the shutters, an operator wishing to move the anchor point may or on the contrary can not achieve this movement to respect the passages required between positions 1, 2 and 3 as previously described.

In a simple manner, the arrangement according to the invention provides that the interlocking means (MI) is a rotary tube (TR) and the shutters are trays (D1, D2), ideally in the form of a half-disc, respectively disposed respectively and transversely to each of the sections of said tube and having an opening (O1, O2) capable of being arranged facing one of the two locks according to the angle of rotation of the tube.

Figures 2 and 3 present a set of front views and two sides of the different positions of an arrangement according to the figure 1 at three positions. It is thus easier to understand the functionality of the interlocking system and the half discs D1, D2 as potential shutters.

Figures 2 A) i) and ii) corresponds to the position of the anchor point at the second and / or fourth contactor C2, C4. ES earthing switch (Earting Switch) and disconnector DS (Disconnector) are disconnected.

The configuration i) presents a first positioning of the half-disks (part rounded downwards), so as to allow access to the lock S1 and simultaneously closing the access to the lock S2 to allow only a displacement of the point anchoring to the contactor C1 of the figure 1 (connection of the earthing switch possible).

The configuration ii) has a second positioning of the half-disks (rounded upward portion), so as to allow access to the lock S2 and simultaneously closing the access to the lock S1 to allow only a displacement of the point anchor to the contactor C3 of the figure 1 (connection of the disconnector possible).

Figure 2 B) corresponds to the position of the anchor point at the first contactor C1 (earthing switch connected "ON"). Access to the lock S2 remains advantageously locked (disconnector remains disconnected "OFF").

Figure 2 C) corresponds to the position of the anchor point at the third contactor C3 (disconnector connected "ON"). Access to the lock S1 remains advantageously locked (earthing switch remains disconnected "OFF").

The Figures 3 A), B) and C) are similar to Figures 2A), B) and C) , but represent complementary positioning of the half-disks of the interlocking system and the anchor point during electrical operation (non-manual) of the mechanical switching arrangement according to the invention. The half-disks are then placed vertically so that their full part simultaneously close the two locks S1 and S2. No manual intervention that could be dangerous is possible.

Claims (8)

Mechanical switching arrangement suitable for controlling high voltage metal-encased electrical contacts comprising: - a guide rail (RG) on which an anchor point (PA) moves under a first stroke (Co1); the first stroke (Co1) is defined by a first and a second contactor (C1, C2) arranged at the edge of the guide rail and ensuring a first and a second point of contact with the anchor point at the ends of the first race (Co1); said first and second contactors (C1, C2) respectively have an open or closed mechanical switching mode of an electrical contact control; characterized in that - As an extension of the first race (Co1), the guide rail (RG) comprises a second race (Co2) under which the anchor point (PA) moves between the second contactor (C2) and a third contactor (C3) ); - The third contactor (C3) is disposed at the edge of the guide rail and provides a third point of contact between the anchor point and the third contactor (C3). Arrangement according to claim 1 for which a fourth contactor (C4) is arranged near the second contactor (C2), ideally the second and fourth contactors being aligned vis-a-vis each side of the guide rail. Arrangement according to claim 2 for which the guide rail is embodied by an oblong opening of a support on which the contactors are arranged by pair (C1, C2, C3, C4) on either side of said rail. Arrangement according to claim 3 wherein the guide rail comprises slide means, such as a worm, electrically controllable and / or manually. Arrangement according to claim 1 for which interlocking means (MI) is coupled to the guide rail to allow: - an earthing command linked to the first contactor (C1), once the anchor point has indicated its departure from the third contactor (C3), then its passage and contact to the second contactor (C2) in order to reach and finally come into contact with the first contactor (C1); a connection command linked to the third contactor (C3), once the anchor point has indicated its departure from the first contactor (C1), then its passage and contact to the second contactor (C2) in order to reach and to come finally in contact with the third contactor (C3). Arrangement according to claim 5 wherein the interlocking means is manually activatable by at least one plug-in key in two locks, each of the locks being accessible by opening a shutter (D1, D2), said opening being controlled by the means of interlock. Arrangement according to claim 6 for which the interlocking means (MI) is a rotary tube (TR) and the shutters are trays (D1, D2), ideally in the form of a half-disc, arranged respectively and transversely to each of the sections of said tube and having an opening (O1, O2) capable of being arranged facing one of the two locks according to the angle of rotation of the tube. Arrangement according to claim 5, wherein the interlocking means is manually activatable, complementarily to an electrical module for moving the anchor point (PA), in particular in the event of failure of said electrical module or a maintenance type manual.

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