FR2904468A1 - Medium/high voltage distribution system, has units allowing switching at given speed and carried by actuating mechanism and device, where units have spring hooked via its ends to end of crank and median zone of lever, respectively - Google Patents

Abstract

The system has medium voltage cells including an interruptor and an earthing switch associated with an actuating mechanism implanted on each cell. A removable actuating device (14) switches the interruptor and the switch. Units allowing switching at given speed are carried by the mechanism and the actuating device. The units have a helical spring (20) hooked via its ends to an end of a removable crank (18) and a median zone of a lever (16) of the device, respectively.

Description

1 DEVICE FOR OPERATING AN EARTH SWITCH OR DISCONNECT FOR ONE

  TECHNICAL FIELD AND PRIOR ART The present invention relates to a medium or high voltage distribution system with a simplified operating mechanism, a device for the distribution of electricity, and a device comprising a device of the same type. switch actuator and / or earthing switch of such a system, a medium voltage cell operable by such an operating device. A medium voltage distribution station 15 has a plurality of current distribution cells or bays. These cells of the state of the art generally comprise a first tumbler mounted rotating on an axis between an open position in which a switch is open and a closed position in which the switch is in the closed position; a second tumbler rotatably mounted on an axis between an open position in which an earthing switch is open and a closed position in which the earthing switch is in the closed position. The current distribution cells, for example the medium voltage cells, comprise two members: a switch which establishes or cuts the passage of the current in the cell, and a ground switch which makes it possible to connect to the potential OV the cables of the cell. The earthing switch is a protection for the operator, for example to carry out maintenance. The members are controlled by a spring-loaded control mechanism which is operated by means of a detachable lever. This type of mechanism is mainly used for medium voltage switchgear. However, it also applies to high voltage transmission and distribution activities.

  There are various embodiments of tumblers in currently known control mechanisms. The tumbler comprises one or more springs for storing energy and able to restore it when it is desired to switch the switch or the switch from one state to another by actuating the lever. Indeed, the actuation of the lever allows to exceed a neutral position, the spring then driving the axis of the switch or the disconnector at a determined speed. It is then necessary to provide stops to limit the movement of the axes using discs with complex shapes, the attachment of the spring or springs is also complicated. The cost of these mechanisms is high. In addition, since the distribution station has several cells, it has as many operating mechanisms as cells.

As a result, the cost price of a distribution station is further increased. Furthermore, the energy required to actuate the switch and / or the earth disconnector is stored permanently in the mechanism, since the spring is compressed in all stable positions of the switch and the earthing switch. . There is therefore a risk of fatigue of the parts thus solicited.

Moreover, because of the number of important parts of the tumblers, the mechanisms have a high mass and are relatively bulky. In addition, there is a real problem of standardization, since the number of different mechanisms used is very important. These mechanisms, because of their complexity, may also experience malfunctions, involving frequent maintenance. It is therefore an object of the present invention to provide a simplified design distribution station and reduced cost. It is also an object of the present invention to provide a simple current, safe and low cost circuit breaker switch or earthing switch actuator mechanism. DISCLOSURE OF THE INVENTION The above stated purpose is achieved by a distribution system having a plurality of cells each having a switch and an earthing switch, wherein the operating mechanisms are distributed between the cells and the control lever. , the crank being removable and can be used for all cells. Thus, a significant cost reduction can be achieved, since part of the mechanism that was duplicated for each cell in the prior art distribution stations is carried by the crank which serves for all cells. The lever can be used for both the switch and the disconnector, or two separate levers 10 are provided for all switches and for all disconnectors respectively. In other words, a part of the operating mechanism can be moved and placed on each cell as needed. The complexity of the mechanism carried by each cell is reduced, and the manufacturing cost of each cell, and therefore that of the distribution station is also reduced. According to the present invention, the mechanism for actuating a switch or an earthing switch comprises an operating lever and a crank mounted on the lever and movable in rotation relative thereto, said crank being intended to come to connect on an axis of a switch or an earthing switch of a medium or high voltage cell, said crank being adapted to be rotated by the rotation of the lever at a given speed by means of a loaded spring. The cell also comprises, at the axes of the switch or the disconnector, means for immobilizing the crank in rotation during a given angular displacement of the lever.

The cell thus no longer has tumblers, the opening / closing mechanism of the switch or earthing switch at the desired speed is distributed between an operating device outside the cell and the cell. This mechanism comprises a spring connecting the lever to the crank and means for holding the crank motionless during a given angular stroke of the lever, at the end of which the spring is loaded to a precise load, the crank is then released and can rotate at the speed set by the spring load, driving the axis of the switch or earthing switch to the given speed. Thus, the part of the switching mechanism of the switch and / or the disconnector of the distribution station is of very simple design. The spring is, outside the phases of actuation, not solicited or very little. Thus there is no energy stored permanently in the mechanism, which avoids fatigue wear of the mechanism parts. The risks of malfunction are also reduced. The cost price is also decreased due to the simplicity of the device. Finally, standardization of mechanisms becomes easy. The present invention therefore mainly relates to a medium or high voltage distribution system comprising a plurality of medium voltage cells provided with at least one switch and an earth-earthing switch associated with an operating mechanism implanted on each of said cells and at least one removable actuating device for switching the switch and / or the earthing switch and means for enabling switching at a given speed, characterized in that the means for permitting a switching at a given speed are carried partly by the operating mechanism implanted on each cell and partly by the removable actuating device.

In an exemplary embodiment, the same operating device can switch all switches and earthing switches, simplifying handling. In another exemplary embodiment, an operating device allows switching of the switches and another switching device allows the switching of the earthing switches, which makes it possible to increase the handling safety further, since a separate device It must be used, and therefore imposes a decision The speed-specific switching means may include means for storing a given amount of energy, which makes the storage means very simple.

The present invention also relates to a device for operating a system according to the present invention, comprising a crank rotatably mounted by a first longitudinal end on a longitudinal end of an actuating lever around a rod. integral with the lever, an elastic means, forming energy storage means, fixed by a first end to a second longitudinal end of the crank and to an intermediate zone of the actuating lever, said zone being disposed between a second end 5 of the lever and the second end of the crank, when it is aligned with the actuating lever and said two second ends being positioned on the same side with respect to the first ends of the crank and the lever, said crank comprising means for securing in rotation to a force input shaft of a shaft of the integer switch or earthing switch. The resilient means may be a helical spring hooked at its ends to a pin protruding from the crank and a pin protruding from the lever, said pin projecting from the crank forming the means for securing the crank in rotation to the crank. axis of the shaft of the switch or disconnector. The operating device can then be very easily adapted to other distribution systems requiring a different cutoff speed. The stem comprises, for example, a radial protuberance to allow the release of the stored energy.

The present invention also relates to a medium voltage cell comprising a switch and earthing switch associated with said switch, the switch and the earthing switch being able to be actuated by at least one operating device 30 according to the present invention, said a switch and an earthing switch comprising, respectively, a force input shaft movable in rotation and connected to an electrical contact, said force input shaft being able to be connected to the first longitudinal end of the crank for be rotated by the latter, first angular immobilization means of the crank on a given angular stroke of the operating lever in a first direction, and second means of angular immobilization of the crank on a determined angular stroke of the operating lever in a second direction opposite to the first direction, these first and second immobilization means, for storing a given amount of energy. The first and second immobilization means 15 advantageously comprise a ratchet operable by the lever to release the crank over a given angular stroke of the lever. The cell may comprise at least one front flange provided respectively for the switch 20 and the earthing switch of an orifice for rotating the lever of the operating device on the flange, a circular arc light centered on said orifice for receiving an end of the pin of the crank, a lever integral in rotation with the axis, said lever having at an end opposite to that fixed on the axis of the means for allowing rotation of the crank on the lever, said means being arranged in line with one end of the light.

The lever of the force input shaft of the switch or the disconnector comprises, for example, an orifice for receiving the pin forming the means for securing the crank to the axis of the shaft of the spindle. switch or earthing switch. The pawl may comprise a movable finger 5 rotating on the front flange parallel to said flange, said finger being arranged to be able to hold the pin of the crank between one end of the finger and an edge of the arcuate light, said finger being adapted to tilt under the action 10 of the protrusion of the operating lever, the pawl comprising a return spring of the finger in the immobilization position of the pin of the crank. The cell advantageously comprises shutters for closing the positioning orifices 15 of the lever on the cell and / or arcuate lights (of the switch and the earthing switch), and interlocking means for prevent the simultaneous ablation of the two shutters, which increases the safety of handling, avoiding a closure of the earthing switch while the switch is closed. The present invention also relates to a distribution station comprising several cells according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be better understood from the following description and the accompanying drawings, in which: FIG. 1A is a front perspective view of a cell mechanism according to the present invention. FIG. 1B is a view of the inside of the mechanism of FIG. 1A, the front flange having been removed, FIG. 2 is a front view of an exemplary embodiment of a FIG. FIG. 3 is a side view of the device of FIG. 2, FIGS. 4A to 4C are views of different positions of the device according to the invention during a maneuvering phase of FIG. 5A to 5C are different views of a device according to the invention mounted on a cell according to the invention during the closing of a switch, FIG. 6 is a diagrammatic representation of a example of a distribution station With several cells or bays according to the present invention, FIG. 7 is a front view of a detail of the operating mechanism of the switch of the cell of FIG. 1. DETAILED DESCRIPTION OF PARTICULAR EMBODIMENTS FIG. 6, there can be seen a dispensing station according to the present invention comprising three cells C1, C2, C3, each having on the front access Al, A2, A3 to a shaft of a switch and a shaft of a disconnector. Earth. The number of cells per station may be greater than or less than 3.

In FIGS. 1A and 1B, a detail of a medium or high voltage cell according to the present invention, comprising a front flange 2 and a rear flange 4, between which are arranged a switch shaft 6 provided with a rotationally movable force input shaft 8 to move from an open position, in which the current does not move to a closed position in which the current flows, and an earth disconnector shaft 10 by way of 10 protection of persons involved on the cell when the switch 6 is open. The earthing switch shaft is provided with a rotationally movable force input shaft 12 to move from a non-grounded open position to a closed position in which the circuit is earthed. The front flange 2 has an orifice 8.1 to allow the insertion of a lever to switch the switch. The front flange 2 also has a lumen 33 centered on the aperture 8.1. The axis 8 of the shaft of the switch 6 is connected to a lever 8.4 perpendicular to the axis 8, provided with an orifice 8.5 arranged opposite one end 33.1 of the slot 33 in a closed position of the switch and facing another end 33.2 of the light 33 in the closed position of the switch. The orifice 8.5 is intended to receive a pin 26 projecting from one side of a crank of an operating device 14 according to the present invention, allowing an easy and fast connection 30.

The operating device according to the present invention comprises a device for maneuvering outside the cell intended to cooperate with means internal to the cell.

Similar to the switch 6, the front flange 2 also has a port 12.1 to allow the insertion of a lever to switch the disconnector. The flange also has a lumen centered on the orifice 12.1. The axis 12 of the disconnector shaft 10 is connected to a lever 12.4 perpendicular to the axis 12, provided with an orifice 12.5 disposed opposite one end 35.1 of the slot 35 in a closed position of the disconnector and 15.5 is intended to receive a pin of a crank of a maneuvering device according to the present invention, allowing easy and fast connection.

The operating device can be the one used for switching the switch 6 or another device intended solely for switching the disconnectors of the distribution station. The operating device according to the present invention comprises an operating device outside the cell intended to cooperate with means internal to the cell. In Figure 2, there can be seen an operating device 14 adapted to switch the switch 6 and the disconnector 10 according to the present invention.

This operating device 14 intended to be fixed on the levers 8.4, 12.4 of the force input shafts, is removable and is adapted to fit each of the shafts of the switches 6 and the disconnectors 10 of the cells C1. at C3. In the rest of the description, reference will be made to the actuation of the switch 6, but the description also applies to the actuation of the earthing switch 10.

The operating device 14 comprises a lever 16 of axis A intended to be moved manually by applying a force on a first longitudinal end 16.1. This first end 16.1 is advantageously provided with a handle 17 for exerting a force on the lever 16. The lever comprises at its other end 16.2 a rod projecting X axis about which it is pivotable. The rod 28 is intended to penetrate into the orifice 8.1, in which it is able to rotate under the action of a force on the lever 16. The rod 28 comprises a radial protuberance 40 intended to cause the release of means switching speed. The cooperation of this protrusion 40 with the operating mechanism 25 will be described later. The orifice 8.1 has in its periphery two cutouts 8.2, 8.3 of corresponding shape, each formed at the ends of the light 33, to allow the correct positioning of the protrusion 40 relative to the mechanism carried by the cell.

The device also comprises a B-axis crank 18 mounted to rotate freely about the X-axis rod 28 at the second end 16.2 of the lever at a first longitudinal end 18.1. The lever 16 and the crank 18 have a thickness much less than their length and their width, and have plane faces 16.3, 16.4, and 18.3, 18.4 respectively.

Thus, when the crank is folded over the lever 16, the faces 16.4 and 18.3 are opposite and the axes A and B are parallel. Energy storage means 20, for example a helical spring is hooked by a first end 20.1 to the second end 18.2 of the crank 18, and by a second end 20.2 to a substantially median zone 22 of the lever 16. the median 22 of the lever is disposed between the handle 17 and the second end 18.2 of the crank, when the crank 18 is on the lever 16, ie when the faces 16.4 and 18.3 are vis-à-vis. In this configuration, the spring 20 is aligned with the crank 18 and the lever 16, and is in the idle position, slightly stressed.

In the example shown, the spring 20 is hooked to the lever by means of a pin 24 projecting from the face 16.4 of the lever 16, the second end 20.2 of the spring 20 having a loop mounted around the pin.

In the same way, the spring 20 is hooked to the crank 18 by means of the pin 26 projecting from the face 18.4 of the crank, the first end 20.1 of the spring comprising a loop mounted around the pin 26. This type of spring The attachment can easily replace the crank 18 and the spring 20, to adapt the operating device to different switches or disconnectors, as will be described later. One end of the pin 26 is intended to penetrate into the orifice 8.5 of the lever 8.4 while passing through the aperture 33. In FIGS. 5A, 5B and 5C, a detail of the cell can be seen at the orifice 8.1 and light 26, the external actuator 14 being mounted on the cell. The cell comprises means 32 for immobilizing the crank in rotation during a given angular displacement of the lever 16 around the X axis. The angular immobilizing means 32 are integral with the front flange 2. The arc-shaped light 33 circle is intended to receive and guide the end of the pin 26, during its rotation relative to the lever 16. The extreme angular positions adapted to be taken by the crank 18 are fixed by the ends 33.1, 33.2 of the light 33. The immobilizing means 32 are arranged in such a way that they hold the stationary crank 18 in the position shown in FIG. 5, blocking the pin 26 against a light end 33.1 of the light. during a given angular stroke of the lever 16, and secondly that they fade, when the lever 16 has traveled the desired stroke, to release the crank 18 so that it can catch the lever 16 and take the an extreme position defined by the end 33.2 of the light 33. In the example shown, the angular immobilizing means 32 comprise a pawl. The pawl comprises a finger 36 rotatably mounted on an inner face of the front flange 2 about an axis X 'substantially at the middle portion of the finger 36. A return element 38, for example a helical spring connects one end 36.2 of the finger 36 to the front flange 2. In the configuration of Figure 7, at rest, the finger 36 is substantially in a vertical position. In the angular immobilization position 20 (FIG. 5C), the finger 36 bears against the pin 26 so that the pin 26 is between an edge of the light 33 and the end of the finger 36.1, resting on the -this. In the example shown, the finger 36 has two parts forming a bend, the portion 25 carrying the end 36.1 being inclined relative to the axis B of the crank 18 towards the end 33.1 of the light 33, and the other part being of axis parallel to the axis B in the locking position. The radial protrusion 40 of the rod 28 is intended to cause the finger 36 to tilt by applying a force on one edge thereof, to move the end 36.1 away from the finger 36 of the pin 26, and to allow the crank 18 pivoting about the X axis. In FIG. 5C, we can see the protrusion 40 which comes into contact with an end 36.2 of the finger opposite the end 36.1 in contact with the pin 26, the finger is ready to rock to release the crank. Second immobilization means 42 (FIG. 7) identical to the means 32 are provided for immobilizing the crank 18 when the lever 16 rotates in the opposite direction, the finger is then at rest in a substantially horizontal position so as to jam the pin 26 at the other end 33.2 of the light 33. The second immobilizing means 42 comprise a finger 44 biasing in the locking position by a spring 46. The protrusion 40 will cooperate identically with one end. 44.2 of the finger 44. During the insertion of the rod 28 of the lever 16 into the orifice 8.1, the protrusion 40 being in a vertical position, it can interfere with the finger 44, in particular by slightly pushing the finger 44 Chamfers may for example be provided on the parts concerned to facilitate their interaction .. This interference is not a problem because, in this direction of maneuver, the finger 44 is not used to immobilize the pin 26, it intervenes at the end of the stroke of the pin to immobilize it during the reverse maneuver.

However, it would be possible to provide second immobilization means (not shown) of different structure. In addition, there are provided shutters (not shown) closing the apertures 8.1, 12.1 and arcuate lights 33, 35 for access to the force input shafts 8, 12 in order to prevent the penetration of dust or foreign bodies in the cell. In addition, so-called interlocking means (not shown) are provided to avoid ablation of the two shutters simultaneously and thus the simultaneous switching of the switch and the earthing switch. The interlocking means connect the two shutters, and prevent when one of the shutters discovers an orifice and / or the light, that the other can discover the other orifice and / or the other light. In addition, these means prevent switching of the earthing switch to the closed position (earthing) when reciprocally. comprise, by the switch is closed, and these inter-locking means example an interconnection bar connecting the two shutters, said bar being also connected Thus, when the tumbler of the earthing switch. this tumbler occupies the position 25 corresponding to the closing of the earthing switch, the interconnection bar prevents ablation of the shutter of the switch, thus preventing its switching.

We will now explain the actuation of the axis 8 of the switch shaft 6 in the direction of a closing of the switch 6. When an operator wants to switch 5 the switch from a position open or closed to a closed or open position respectively, that introduces the rod 28 of the lever 16 into the orifice 8.1, so that the protrusion 40 enters the vertical cutout 8.2. The crank 18 is, at the beginning of the switching phase, aligned with the lever 16 as shown in FIG. 4A. Simultaneously, the peg 26 of the crank 18 enters the aperture 33 between the edge of the aperture 33 and the end 36.1 of the finger 36, then into the aperture 8.5 of the lever 8.4 integral in rotation with the axis 8. The crank is in this position immobilized in rotation around the axis X. The operator applies a force on the lever 16 at the handle 17 in the clockwise direction as symbolized in FIG. 5C by the arrow F. The lever 16 pivots alone about the X axis, driving the rod 28 and the protrusion 40 clockwise, the crank 18 remaining in the vertical position 25 in the representation of Figure 5, and the lever 8.4. The spring 20 is then urged in tension (Figure 4B), storing energy. When the protrusion 40 comes to apply a force on the finger 36 to the right in FIG. 5C, the finger 36 pivots clockwise around the axis X ', releasing the pin 26 which, under the action of 2904468 20 spring, rotates about the X axis in the clockwise direction guided by the light 33, until the spring 20 is in the rest position, as shown in Figure 4C.

The pin 26 carries with it the lever 8.4 which drives the axis 8 of the switch 6, it is then switched at a speed set by the load of the spring 20. The finger 36 resumes its rest position under the action of the return spring 38. In the example shown, the protrusion 40 causes the tilting of the finger 36 when the axes A of the lever 16 and the axis B of the crank 18 form an angle of about 90. But it can be chosen that this release is effected at another angle value by modifying the position of the protrusion 40. Thus the speed of rotation of the crank 18, and thus of switching of the switch 6 is determined by the positioning of the protrusion 40 and the loading of the spring 20. The release of the crank 18 advantageously takes place just before the lever 16 occupies its extreme position. This allows to release a maximum of energy and to be in the near-final position of the lever.

When the operator wants to switch the switch in a reverse manner, this time to open it, he performs the same maneuver in the opposite direction by rotating the lever 16 counterclockwise. This time, it is the second immobilizing means 42 which prevent the crank 18 from moving during a given stroke of the lever 16.

Since the first 32 and second 42 immobilization means are mechanical, they offer a very high reliability of operation. When the operator wishes to close the earthing switch, he removes the operating device 14, that is to say that is, it extracts the rod 28 from the orifice 8.1 to allow the closure of the shutter and to allow the opening of the shutter giving access to the axis 12 of the earth-disconnector shaft 10. Then the operator sets up the operating device 14, or another only for the earthing switch according to the chosen option, and performs the switching of the earthing switch 10 in a manner similar to that of the switch 6. Thanks to the present Invention, the maneuvering device is very simplified, and therefore even more reliable. In fact, the spring is placed on the external actuating device, so that the part of the operating mechanism in the cell is limited to the angular immobilization means, interlocking means and lights on the outer face of the flange 2 .

As the number of pieces is substantially reduced, since a portion is used for all the switches and / or switches of several cells, the cost reduction is important. In addition, the present invention facilitates standardization. Actually, the operating lever 16 can be used for all the actuating mechanisms for a cell by adapting the crank 18 and the spring 20. Moreover, the maintenance is reduced, and can be limited to that of the external actuating device 5. . It is also possible to provide a motorization of the external operating device, by setting up an electric motor and toothed wheels on the lever to rotate it following a command.

Claims (14)

  1. Medium or high voltage distribution system comprising a plurality of medium voltage cells provided with at least one switch (6) and an earthing switch (10) associated with an operating mechanism implanted on each of said cells and at least one a detachable actuating device (14) for switching the switch (6) and / or the earthing switch (10) and means for permitting switching at a given speed, characterized in that the means for permitting a switching at a given speed are carried partly by the operating mechanism implanted on each cell and partly by the removable actuating device.   2. Dispensing system according to the preceding claim, wherein the same operating device can switch all switches (6) and all earthing switches (10).   3. Dispensing system according to claim 3, wherein an operating device allows switching of the switches (6) and another operating device allows switching of the earthing switches (10).   4. Dispensing system according to the preceding claim, wherein the means for switching at a given speed comprise means for allowing the storage of a given amount of energy.   5. Apparatus for operating a system 5 according to one of claims 2 to 4, comprising a crank (18) rotatably mounted by a first longitudinal end (18.1) on a longitudinal end of a lever (16) d. actuating around a rod (28) integral with the lever (16), an elastic means (20), forming energy storage means, fixed by a first end (20.1) to a second longitudinal end (18.2) of the crank (18) and an intermediate zone of the actuating lever (16), said zone being disposed between a second longitudinal end (16.2) of the lever (16) and the second end (18.2) of the crank (18) when it is aligned with the operating lever (16) and said two second ends (16.2, 18.2) being positioned on the same side 20 with respect to the first (18.1, 16.1) ends of the crank (18) and the lever (16), said crank (18) having a means for securing in rotation to a force input shaft (8, 12) of a shaft of the switch (6) or of the earthing switch (10). 25   6. Maneuvering device according to the preceding claim, wherein the resilient means is a coil spring (20) hooked at its ends to a pin (26) projecting from the crank (18) and by a pin (24) projecting the lever (16), said pin (26) projecting from the crank (18) 2904468 25 forming the means for rotationally connecting the crank to the axis (8, 12) of the switch shaft (8 ) or the disconnector (10). 5   7. Maneuvering device according to claim 5 or 6, wherein the rod comprises a radial protrusion (40) to allow the release of the stored energy. 10   8. Medium voltage cell comprising a switch (6) and earthing switch (10) associated with said switch, the switch (6) and the earthing switch (10) being able to be actuated by at least one operating device according to the invention. one of the claims 5 to 7, said switch (6) and earthing switch (10) respectively comprising a shaft (8, 12) of force input movable in rotation and connected to an electrical contact, said axis (8 12) of force input being adapted to be connected to the first longitudinal end of the crank (18) to be rotated by it, first angular immobilization means (32) of the crank ( 18) on a given angular stroke of the operating lever (16) in a first direction, and second angular immobilizing means (42) of the crank (18) on a given angular stroke of the operating lever (16) in a second direction opposite to the first re direction, these first (32) and second (42) locking means, allowing the 30 storage of a given amount of energy. 2904468 26   9. Medium voltage cell according to the preceding claim, wherein the first (32) and second (42) immobilizing means comprise a ratchet operable by the lever (16) to release the crank (18) beyond a given angular stroke of the lever (16).   10. Medium voltage cell according to claim 8 or 9, comprising at least one front flange (2) provided respectively for the switch (6) and the earthing switch (10) of an orifice (8.1, 12.1) for rotating the lever of the operating device on the flange (2), a circular arc slot (33, 35) centered on said orifice (8.1, 12.1) for receiving one end of the crank pin (26) ( 18), a lever (8.4, 12.4) integral in rotation with the axis (8, 12), said lever (8.4, 12.4) having at one end opposite to that fixed on the axis (8, 12) means ( 8.5, 12.5) to allow rotation of the crank (18) to be secured to the lever (8.4, 12.4), said means (8.5, 12.5) being arranged in line with one end of the light (33, 35). 25   11. Cell according to the preceding claim in combination with claim 6, wherein the lever (8.4,   12.4) comprises an orifice (8.5, 12.5) for receiving the pin (26) forming the means for securing the crank of the operating device according to claim 6, to the axis (8, 12) of the shaft of the switch (6) or the earthing switch (10). 12. The medium voltage cell according to one of claims 9 to 11 in combination with claim 10, wherein the pawl comprises a finger (36, 44) rotatable on the front flange 5 (2) parallel to said flange ( 2), said finger (36, 44) being arranged to be able to hold the pin (26) of the crank (18) between an end (36.1) of the finger (36, 44) and an edge of the light ( 33, 35) in an arc of a circle, said finger (36, 44) being able to tilt under the action of the protuberance (40) of the operating lever (16), the pawl comprising a spring (38, 46) returning the finger (36, 44) to the immobilization position of the pin (26) of the crank (18). 15   13. Medium voltage cell according to one of claims 8 to 11, comprising shutters for closing the orifices (8.1, 12.1) for placing the lever on the cell and / or arcuate lights (33, 35). ) of the switch and the earthing switch, and interlocking means to prevent simultaneous ablation of the two shutters.   14. Multi-cell dispensing station according to one of claims 8 to 13.