FR2941558A1 - Control device for single or three phase earthing switch, of gas-insulated switchgear, has control member rotating to drive locking finger to escape stop so as to rotate driven member by release of energy from torsion spring - Google Patents

Abstract

The device (1) has a driven member formed of a driven shaft (30) and a driven lever immobilized in a preset direction by retaining a stop portion by using a stop forming part when the device has a locked configuration. A control member is formed of a control shaft (10) and a cam (20) rotates in the direction until a cam follower element is at contact of triggering portion to drive a locking finger to escape a stop between the part and the stop portion to release the device from the configuration, so as to rotate the driven member in the direction by energy released from a torsion spring (50). Independent claims are also included for the following: (1) a medium or high voltage electric apparatus, comprising a fixed earthing contact (2) a method for actuating a control device of medium or high voltage electric apparatus.

Description

TECHNICAL FIELD The present invention relates to the general field of electrical equipment and in particular to electrical devices in a sealed metal casing (gas-insulated switchgear in English). ). The invention relates to a device for controlling medium or high voltage electrical equipment, for example an earthing switch. The invention is particularly applicable to earthing switches having a very low switching time. STATE OF THE PRIOR ART The current distribution cells, for example medium or high voltage cells, comprise in particular an earthing switch capable of grounding the conductors through which the current flows. The earthing switches usually comprise at least one assembly comprising an earth contact, a phase contact and a movable connection element for electrically connecting the earth contact and the phase contact, to ground the phase contact. said assembly being housed in a casing sealed and filled with a dielectric gas. The displacement of the movable connecting element is generally obtained by the actuation of a control device by means of, for example, an electric motor or a removable lever. For example, the document EP0895260 discloses an earthing switch control device equipped with an electric motor and a mechanical spring for performing the opening and closing phases of the connection means. The control device comprises a control shaft actuated in rotation by the electric motor.

The rotation of the shaft makes it possible to mechanically tension a compression spring and to release the energy accumulated by said spring. A complex linkage mechanically connects the electric motor and the compression spring by means of connection, so that the release of the energy of the spring makes it possible to open and close the connection means. The controller has a four-step maneuvering sequence. Indeed, each phase of opening and closing of the mobile connection means causes the discharge of the spring. Also, each of them is preceded by a spring arming phase in which the connecting means remains at rest. For example, during the opening phase of the connection means, the control device switches from a loaded spring configuration / closed connection means to a discharged spring configuration / open connection means. To return the operational control device again, a spring arming phase is necessary. The controller then switches from the unloaded spring configuration / open connection means to the loaded spring / open connection configuration. The closing phase can then be performed. This solution nevertheless has certain disadvantages. To open and close the connection means, it is necessary that the control device occupies an operational configuration in which the spring is under mechanical tension. A certain number of mechanical parts of the control device are then subjected to permanent mechanical stresses during a waiting time which can be particularly long. These parts are likely to deform or experience premature fatigue. In addition, the complexity of the linkages present and the use of large lever arms reduce the reliability of the control device and generate a large footprint. Document SE420033 describes a simplified device for controlling an earthing switch comprising a movable contact and a fixed contact. The closing phase of the moving contact is achieved by the release of the energy of a spiral spring disposed outside the envelope. The control device comprises a control shaft on which the spiral spring is mounted. When it is under mechanical tension, the shaft is constrained in rotation in a given direction. The control device comprises a gripping finger adapted to lock in rotation the control shaft in said determined direction. A connecting rod mechanism connects the control shaft to the moving contact. The actuation of the control device from a locked configuration thereof allows for the closing phase of the movable contact. In this locked configuration, the spiral spring is under mechanical tension and the latching finger blocks in rotation the control shaft in the determined direction. By actuation of the control device, the gripping finger is set in motion and releases the control shaft in rotation. Under the effect of the stress induced by the spiral spring, said shaft is rotated in the determined direction, which causes the moving contact to move from its open position to its closed position. The spring is then discharged and the contacts closed. The opening of the contacts is then effected by inverse rotation of the control shaft until the latching finger is re-engaged, which automatically puts the spiral spring under mechanical tension. This control device also has the disadvantage of having a locked configuration in which the spiral spring is under mechanical tension, which results in mechanical stresses in some parts of the control device. The reliability of the device is then reduced. Furthermore, this control device requires two mechanisms dedicated one to the triggering of the latching finger for the closing phase, the other to the reverse rotation of the control shaft until the engagement of the finger for the opening phase. DISCLOSURE OF THE INVENTION The main purpose of the invention is to present a control device for medium or high voltage electrical equipment, in particular of the earthing switch, at least partially overcoming the aforementioned drawbacks relating to the exemplary embodiments. of the prior art. For this purpose, the subject of the invention is a device for controlling medium or high voltage electrical equipment. According to the invention, said control device comprises: a control member rotatably mounted about a first axis and having a surface forming a cam surface, said cam surface having a trigger portion; - A driven member rotatably mounted about a second axis and having a stop portion; energy storage means mounted on the one hand on said control member and on the other hand on said driven member; a locking finger having a stop portion and a cam follower member abutting said cam surface; said device being adapted to occupy a locked configuration in which said driven member is immobilized in rotation in a direction determined by virtue of the retention of its abutment portion by the abutment portion of the locking finger, said device being able to be released from its configuration locked by a rotation of the control member in said determined direction, causing a mechanical tension of said energy storage means, until said cam follower member is in contact with said trigger portion of the cam surface, which causes a movement of said locking pin causing an escape of the abutment between said abutment portion of the finger and said abutment portion of the driven member, said escapement of the abutment leading to a rotation of the driven member in the direction determined by the release of the energy of the energy storage means. Thus, when the control device according to the invention occupies said locked configuration, the energy storage means has a substantially unloaded energy state. Also, no part of the control device is subjected to mechanical stresses and is therefore likely to experience deformation or premature fatigue. The control device then has increased reliability and a long service life. Furthermore, the number of mechanical parts necessary for the transmission of the control force of the control member to the driven member is minimized, which significantly improves the efficiency of the kinematic chain. The triggering force required to achieve the exhaust of the stop is thus reduced. Preferably, the locking finger is rotatably mounted along a third axis. The third axis is advantageously parallel to said first axis. The locking finger can also be slidably mounted. Advantageously, said energy accumulator means has an axis of symmetry. Said control member, said driven member and said energy accumulator means are coaxial with each other. It is then advantageous for the energy storage means to be designed to accumulate energy during an increase in an angular difference defined by a difference in angular position between said control member and said driven member about said first axis. Said energy storage means may be selected from a torsion spring, a spiral spring and a torsion bar.

Preferably, said control member comprises a cam mounted integral with a control shaft and said driven member comprises a driven lever mounted integral with a driven shaft, said driven shaft and said control shaft being at least partially facing each other. one of the other in the radial direction with respect to said first axis. Preferably, said energy storage means being a torsion spring, said control shaft and said torsion spring are at least partially facing each other in the radial direction with respect to said first axis .

By this original arrangement of the control shaft, the driven shaft and the torsion spring, wherein these mechanical parts are at least partially interlocked with each other, or vis-à-vis each other, the control device has a minimal bulk, and a significant improvement in the efficiency of the kinematic chain. Said abutment portion of the driven member 10 advantageously comprises a stop axis located at one end of said driven lever. Preferably, said triggering portion of the cam surface has a local slope of the cam surface. The unevenness comprises a connecting surface between a reference surface and a triggering surface. Preferably, said locking finger comprises a screw for adjusting the position of said abutment portion relative to said cam surface. Thus, the moment of escape of the abutment, also called instant of tripping or unlocking, can be precisely defined. Preferably, an abutment member for said driven member is disposed to define an end position of said driven member upon release of energy from the energy accumulator means. Preferably, said cam surface comprises at least one bearing shoulder intended to bear against said driven member during a rotation of the control member in the opposite direction to said determined direction.

The invention also relates to a medium or high voltage electrical apparatus comprising a fixed earth contact, a phase contact able to be electrically connected to a conducting bar and a mobile connection means able to bring the earth contact into electrical contact with each other. said phase contact, and a control device according to any one of the above features permitting the operation of said mobile connection means.

The invention also relates to a method of actuating said control device of the electrical equipment defined above. According to the invention, said method comprises a step of rotating said control member in said determined direction: - a rest position in which said cam follower element is not in contact with said trigger portion of the a cam surface, said energy accumulator means being substantially discharged, to an unlocking position in which said cam follower member is in contact with said trigger portion of the cam surface, said energy accumulator means being energized mechanical, which causes a movement of said locking pin causing an escape of the abutment between said abutment portion of the finger and said abutment portion of the driven member, said escapement of the abutment leading to a rotation of the organ driven in the direction determined by the release of energy energy storage means, said driven member manipulating said con mobile connection for electrically contacting said earth contact and said phase contact. Said method may comprise an additional step of rotating said control member in the opposite direction to said determined direction until said abutment portion of the locking pin forms a stop for said abutment portion of the driven member in the direction determined rotation.

Advantageously, during said additional step, said energy storage means remains in a substantially discharged state.

Other advantages and features of the invention will become apparent in the detailed non-limiting description below. BRIEF DESCRIPTION OF THE DRAWINGS Embodiments of the invention will now be described by way of nonlimiting examples, with reference to the accompanying drawings, in which: FIG. 1 is a diagrammatic sectional view of a device of FIG. earth-earthing switch control according to the preferred embodiment of the invention; Figure 2 is a partial schematic perspective and exploded view of the outer plate of a portion of the control device shown in Figure 1; Figure 3 is a schematic sectional view along section A-A of the control device shown in Figure 1, the control member being at rest and the driven member being locked; Figure 4 is a schematic sectional view along section A-A of the control device shown in Figure 1, the control member being actuated and the driven member being locked; Figure 5 is a schematic sectional view along section A-A of the control device shown in Figure 1, the control member being actuated and the driven member being unlocked; Figure 6 is a schematic sectional view along section B-B of the control device shown in Figure 1, the mobile connection means being open; Figure 7 is a schematic sectional view along section B-B of the control device shown in Figure 1, the movable connection means being closed. DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT The present invention applies to both single-phase earthing switches and three-phase earthing switches. We will describe later a single-phase disconnector control device. The structure of the earthing switch control device according to the preferred embodiment of the invention is described with reference to FIGS. 1 to 3. The control device 1 comprises a control member and a driven member, coupled to each other. the other via an energy storage means. A locking pin is provided which cooperates with the driven member. The control device also comprises a drive mechanism of the mobile connection means. The control member comprises a control shaft 10 rotatably mounted around a first axis I-I in a passageway sealingly traversing an outer plate 2. The outer plate 2 participates in defining a sealed compartment 4.

The control shaft 10 comprises an outer end located outside said compartment 4. An actuating means (not shown) of the control shaft can be mounted on said outer end of the control shaft. The actuating means may be, for example, a control lever or an electric motor. The control shaft 10 comprises an inner end located inside said compartment 4. A cam 20 is mounted in one piece on the inner end of the control shaft 10 and has a cam surface 21. cam surface 21 present (Figure 3) a recess forming a trigger portion 22. The recess comprises a release surface 23 which has a radial distance along the first axis relative to a reference surface 24 of the cam surface, and that a connecting surface 25 in the form of a difference 25 between said trigger surface 23 and said reference surface 24 of the cam surface 21.

The cam surface 21 also comprises two bearing shoulders 26A, 26B each having a bearing surface which extends substantially radially along the first axis.

The control device 1 also comprises (FIG. 1) a driven member mounted to rotate about a second axis. The second axis coincides with the first axis I-I. The driven member comprises a driven shaft 30 rotatably mounted in a passageway sealingly traversing an inner plate 3. The inner plate 3 participates in defining, on the one hand the sealed compartment 4, and on the other hand a sealed envelope 5.

The envelope 5 is preferably filled with a dielectric gas, for example SF6. The sealed compartment 4 is preferably liquid-tight, for example with water. The outer plate 2 is sealingly mounted on the inner plate 3 so as to form said sealed compartment 4. The driven shaft 30 comprises a first portion located inside said compartment 4 and a second portion located inside of said casing 5. The driven member also comprises (Figures 2 and 3), housed inside said compartment 4, a driven lever 40 mounted integral with the driven shaft 30 at the first part thereof.

Said driven lever 40 includes a first end 41A and an opposite second end 41B and is mounted on the driven shaft at a central portion. The driven lever 40 comprises, at its first end 41A, a stop portion 42. The abutment portion comprises a stop axis 42 substantially parallel to said first axis. Furthermore, the ends 41A, 41B of the driven lever 40 are adapted to cooperate with the shoulders 26A, 26B of the cam surface 21, so that each end of the lever can be in contact with a respective bearing surface. As shown in Figure 1, the driven shaft 30 is partially housed in an axial housing of the control shaft 10. Thus, the control shaft 10 at least partially covers the driven shaft 30, without direct mechanical link between the control shaft 10 and the driven shaft 30. In other words, the driven shaft 30 is at least partially nested in the control shaft 10. This substantially reduces the size of the control device according to the invention. Furthermore, two abutment members 7A, 7B are mounted on the inner plate 3 and limit the rotational stroke of the driven lever 40. The first abutment member 7A is intended to form a stop for the first end 41A of the driven lever 40 according to a first direction of rotation. It defines an end position of said driven lever 40 during the release of energy energy storage means 50, as explained below.

Subsequently, the first direction of rotation, corresponding to the clockwise direction in FIGS. 3 to 5, is called the closing direction of rotation. The opposite direction of rotation is called the opening direction of rotation. The second stop member 7B is intended to form a stop for the second end 41B of the driven lever 40 in the direction of opening rotation. It then defines a locking position of the driven lever 40. The two abutment members 7A, 7B may be made of a material for damping shocks with the ends 41A, 41B of the driven lever 40.

The control device 1 also comprises energy storage means 50 mounted on the one hand on the control member and on the other hand on the driven member. The energy storage means according to the preferred embodiment of the invention comprises a torsion spring 50 having an axis of symmetry and having two attachment ends. The axis of symmetry of the spring coincides with said first and second axes, so that the control shaft 10, the driven shaft 30 and the torsion spring 50 are coaxial. The torsion spring 50 is mounted at a first end on the drive shaft 10 and at a second end on the driven lever 40. Specifically, the second end of the torsion spring 50 is arranged in a notch located at the second end 41B of the driven lever 40. The control shaft 10 and the torsion spring 50 are at least partially vis-à-vis one another, or nested, in the radial direction relative to said first axis II. In the embodiment of Figure 1, the control shaft 10, the driven shaft 30 and the torsion spring 50 are arranged to be at least partially nested in the radial direction with respect to said first axis. Also, the size of the control device is substantially reduced. The torsion spring 50 may have turns of circular or square section, or any other shape.

When the bearing surfaces of the shoulders 26A, 26B of the cam 20 are substantially in contact with the ends 41A, 41B of the driven lever 40, or close thereto, the difference between the angular position of the cam 20 and that of the driven lever 40, relative to the first axis II, defines a substantially zero angular gap (Figure 3). The torsion spring 50 then occupies a substantially unloaded energy state. When the angular difference is not zero (FIG. 4), the bearing surfaces of the shoulders 26A, 26B of the cam 20 are situated at a distance from the ends 41A, 41B of the driven lever 40. The torsion spring 50 is then under tension mechanical. The torsion spring 50 accumulates an energy all the greater as the angular difference is large.

The control device 1 also comprises a locking pin 60 rotatably mounted about a third axis on the inner plate 3. The third axis is substantially parallel to said first axis I-I. The locking pin 60 comprises a cam follower element 61 intended to contact said cam surface 21. An elastic return means 64, here a compression spring, is connected to the locking pin 60 so as to maintain contact between the follower member 61 of finger 60 and cam surface 21. Locking finger 60 also includes an abutment portion 62 in the form of notch. Said abutment portion 62 is adapted to retain said abutment portion 42 of the driven lever 40 in the closing direction of rotation thereof. As is more particularly illustrated in FIG. 7, the control device 1 comprises a connecting rod mechanism 70, disposed inside the casing 5, for moving the movable connection means 81 in displacement. The connecting rod mechanism 70 is mounted at one end to the driven shaft 30 at its second portion and at another end to the movable connection means 81. The link mechanism 70 enables the rotational movement of the driven shaft 30 to be converted into a translational movement of the movable connection means 81. More specifically, the connecting rod mechanism 70 comprises a return lever 71 mounted integral at one end on the driven shaft 30 and rotatably mounted at the opposite end on a connecting rod 72. The connecting rod 72 is rotatably mounted on the return lever 71 and on one end of the movable connection means 81. The mobile connection means 81 is here a rod movable in translation between a first positio n isolation of the earth contact 82 and the phase contact 83, said open position, and a second electrical connection position between the earth contact 82 and the phase contact 83, said closed position. The fixed earth contact 82 has a passage for slidingly receiving the movable connection and the phase contact 83 has a cavity for receiving an end of the mobile connection.

The operating principle of the earthing switch control device according to the preferred embodiment of the invention is as follows, with reference to FIGS. 3 to 5, and 6 and 7, which illustrate the sequences of a closing phase of the mobile connection means. In FIG. 3, the control device 1 is in a rest operational configuration. It is ready to be actuated to carry out the closing phase of the mobile connection means 81. In this configuration, the driven lever 40 is locked by the locking pin 60. More specifically, the stop axis 42 of the driven lever 40 is housed inside the notch of the abutment portion 62 of the finger 60. Also, the locking pin 60 forms a stop for the driven lever 40 in the direction of closing rotation. Furthermore, the second end 41B of the driven lever 40 is disposed in contact with or near the second stop member 7B. This forms a stop for the driven lever 40 in the direction of opening rotation. Also, in the locked configuration, the driven lever 40 can not be rotated regardless of the direction of rotation. The drive shaft 10 and the driven shaft 30 occupy angular positions such that the bearing surfaces of said shoulders 26A, 26B of the cam surface 21 are substantially in contact with or near the respective ends 41A, 41B of the driven lever. 40. The angular gap formed is then substantially zero. The torsion spring 50 is substantially unloaded. To achieve the closing phase of the movable connection means 81, the control shaft 10 is actuated so as to rotate the cam 20 in the closing direction of rotation (Figure 4). The cam 20 is then rotated so that the trigger portion 22 of the cam surface 21 approaches the cam follower 61 of the locking finger 60. The cam 20 then has an angular position which varies according to its rotation , integral with the rotation of the control shaft 10. Insofar as the driven lever 40 is held in rotation by the locking pin 60, the angular gap increases and the torsion spring 50 is put under mechanical tension. In addition, the energy accumulated by the spring 50 increases with the angular difference. FIG. 4 illustrates an intermediate configuration that precedes the unlocking instant. It should be noted that, preferably, this configuration does not correspond to a dead time or a pause when the control shaft 10 is actuated. The control shaft 10 is being rotated in the direction of closing rotation. The cam follower 61 is in proximity to the trigger portion 22 of the cam surface 21. The locking finger 60 holds the driven lever 40 in the closing direction of rotation.

The unlocking phase of the driven lever 40 is performed when, due to the rotation of the control shaft 10, the cam follower element 61 contacts the connecting surface 25 or the trigger surface 23 of said triggering portion 22. .

The cam surface 21 then exerts a force on the cam follower 61 which causes a rotation of the locking finger 60 in a counterclockwise direction about the third axis. As shown in FIG. 5, the rotation of the locking pin 60 causes a stop exhaust between the abutment portion 62 of the locking pin 60 and the abutment axis 42 of the driven lever 40. The exhaust of the abutment at rotation in the direction of closing rotation of the driven lever 40, due to the release of the energy of the torsion spring 50.

It should be noted that, when the stopper is exhausted, the energy accumulated by the torsion spring 50 has a maximum value, proportional to the angular difference between the driven lever 40 and the cam 20.

The driven lever 40 then moves in rotation, under the effect of its stress induced by the torsion spring 50, until its first end 41A abuts against the first stop member 7A. Upon rotation of the driven lever 40, the driven shaft 30 rotates identically and causes the movable connection means 81 to move from the open position (Fig. 6) to the closed position (Fig. 7). The electrical connection between the phase contact 83 and the earth contact 82 is established when the first end 41A of the driven lever 40 is substantially in abutment with the first stop member. It should be noted that when the first end 41A of the driven lever 40 is substantially in abutment against the first stop member 7A, the angular gap is substantially zero. The torsion spring 50 is then substantially discharged. The operation of the control device to realize the opening phase of the mobile connection means is as follows. The control device occupies the configuration illustrated in FIG. 5. The control shaft 10 is actuated in rotation in the direction of opening rotation. The bearing surfaces of the shoulders 26A, 26B of the cam 20 are in contact with the ends 41A, 41B of the driven lever 40 and exert a force in rotation on the driven lever 40. The driven lever 40 is thus displaced in rotation by the 20 until the stop axis 42 of its first end 41A is engaged in the abutment portion 62 of the locking pin 60. In a substantially simultaneous manner, the second end 41B of the driven lever 40 comes into contact with or near the second stop member 7B. The driven shaft 30 rotates together with the driven lever 40, and causes the movable connection means 81 to move from the closed position to the open position.

At the end of the actuation of the control shaft 10, the control device occupies the locked configuration illustrated in FIG. 3. It is then able to be actuated to carry out a new closing phase of the mobile connection means.

According to an alternative embodiment, the energy accumulator means is not coaxial with the control member and the driven member. Thus, the energy storage means may comprise a compression spring or traction connected to the driven lever and the cam, which has an axis of symmetry substantially orthogonal to said first axis. In addition, the driven shaft can be offset relative to said control shaft, so that the first and second axes are substantially parallel but non-coaxial.

According to another variant, the torsion spring can be replaced by a torsion bar mounted at one end on the control shaft and at an opposite end on the driven shaft.

A spiral spring can also be used as energy storage means. The axial end of the spiral spring can be mounted on the control shaft and the radial end can be mounted on the driven lever. It is also possible to mount the axial end on the driven shaft and the radial end on the cam. The operation is substantially identical to that described above. In the case of a three-phase earthing switch, three fixed earth contacts are respectively associated with a phase contact and a mobile connection means, the mobile connection means being able to move along parallel axes. Advantageously, there is provided a single control device for the three mobile connection means. But a control device for each mobile connection means is also possible. It is advantageous for the locking finger to comprise a set screw 63 (FIGS. 3 to 5) of the position of said abutment portion relative to the cam surface. More precisely, the adjusting screw 63 makes it possible to move the abutment portion towards or away from the cam surface. Thus, it is possible to precisely define the moment of escape of the stop between the abutment portion of the locking finger and the abutment axis of the driven lever.

In the case of a three-phase disconnector comprising a control device for each mobile connection means, each adjustment screw makes it possible to precisely synchronize the control devices by making the different moments of escape of the stop of the control devices coincide. In the example shown, the earth contact is permanently in contact with the mobile connection. Alternatively, it could provide a mobile connection away from the earth contact and which would come into contact only with the earth contact in the case of a ground. It would be conceivable to mount the sliding mobile connection in the phase contact and move the rod towards the earth contact. The control device also applies to the actuation of medium or high voltage circuit breakers. A medium or high voltage circuit breaker usually includes movable arcing contact and contact with a fixed arcing contact. A control device according to the invention makes it possible to ensure the opening of the circuit breaker, that is to say the breaking of contact between the two arcing contacts. For this, the trip shaft can be connected to the moving arc contact by a link mechanism so that actuation of the control device causes the arc contact to move from the closed position to the open position.

Of course, various modifications may be made by those skilled in the art to the invention which has just been described, solely by way of non-limiting examples.

Claims (14)

REVENDICATIONS1. Device for controlling medium or high voltage electrical equipment, characterized in that it comprises: - a control member (10, 20) rotatably mounted about a first axis (II) and having a surface forming a cam surface ( 21), said cam surface (21) having a trigger portion (22); a driven member (30, 40) rotatably mounted about a second axis and having a stop portion (42); energy storage means (50) mounted on the one hand on said control member (10, 20) and on the other on said driven member (30, 40); a locking finger (60) having a stop portion (62) and a cam follower (61) bearing on said cam surface (21); said device being adapted to occupy a locked configuration in which said driven member (30, 40) is immobilized in rotation in a determined direction by virtue of the retention of its abutment portion (42) by the abutment portion (62) of the finger blocking (60), said device being able to be released from its locked configuration by rotating the control member (10, 20) in said determined direction, causing said accumulator means (50) to be mechanically tensioned; until said cam follower member (61) is in contact with said trigger portion (22) of the cam surface (21), thereby causing a movement of said blocking finger (60) causing an escape the abutment between said abutment portion (62) of the finger (60) and said abutment portion (42) of the driven member (30, 40), said escapement of the abutment leading to a rotation of the organ driven (30, 40) in the direction determined by the release of energy from the energy storage means (50). 2. Control device according to claim 1, characterized in that said means (50) energy accumulator has an axis of symmetry, and in that said control member (10, 20), said driven member (30, 40 ) and said energy storage means (50) are coaxial with each other. 3. Control device according to claim 1 or 2, characterized in that said means (50) energy accumulator is selected from a torsion spring, a spiral spring and a torsion bar. 4. Control device according to any one of claims 1 to 3, characterized in that said control member (10, 20) comprises a cam (20) integral with a control shaft (10) and in that said driven member (30, 40) comprises a driven lever (40) integrally mounted on a driven shaft (30), said control shaft (10) and said driven shaft (30) being at least partially vis-à-vis one the other in the radial direction with respect to said first axis (II). 5. Control device according to claim 4, characterized in that said means (50) energy accumulator being a torsion spring, said control shaft (10) and said torsion spring (50) are at least partially screwed to one another in the radial direction with respect to said first axis (II). 6. Control device according to claim 4 or 5, characterized in that said abutment portion (42) of the driven member (40) comprises an abutment pin (42) located at one end (41A) of said driven lever ( 40). 7. Control device according to any one of claims 1 to 6, characterized in that said tripping portion (22) of the cam surface (21) has a local slope of the cam surface (21). 8. Control device according to any one of claims 1 to 7, characterized in that said locking finger (60) comprises a set screw (63) of the position of said abutment portion (62) relative to said surface cam (21). 9. Control device according to any one of claims 1 to 8, characterized in that it comprisesa stop member (7A) for said driven member (30, 40), arranged to define a limit position of said driven member (30, 40) upon release of energy from the energy accumulator means (50). 10. Control device according to any one of claims 1 to 9, characterized in that said cam surface (21) comprises at least one bearing shoulder (41A, 41B) intended to bear against said driven member (30). , 40) during a rotation of the control member (10, 20) in the opposite direction to said determined direction. 11. Medium or high voltage electrical equipment comprising a fixed earth contact (82), a phase contact (83) adapted to be electrically connected to a conducting bar, and a mobile connection means (81) adapted to bring said earth contact (82) and said phase contact (83), and a control device according to any one of claims 1 to 10 for operating said movable connection means (81). 12. A method of actuating said control device of the electrical equipment according to claim 11, characterized in that it comprises a step of rotating said control member (10, 20) in said determined direction: - d ' a rest position in which said cam follower member (61) is not in contact with said trigger portion (22) of the cam surface (21), said energy accumulator means (50) being substantially discharged, an unlocking position in which said cam follower member (61) is in contact with said trigger portion (22) of the cam surface (21), said energy accumulator means (50) being under mechanical tension, thereby causes a movement of said locking pin (60) causing an escape of the stop between said abutment portion (62) of the finger (60) and said abutment portion (42) of the driven member (30, 40), said exhaust the stop leading to a setting in rotation of the driven member (30, 40) in the direction determined by the release of energy from the energy storage means (50), said driven member (30, 40) operating said movable connection means (81) for electrically contacting said earth contact (82) and said phase contact (83). 13. A method of actuating said control device according to claim 12, characterized in that it comprises a further step of rotating said control member (10, 20) in the opposite direction to said determined direction until said stop portion (62) of the locking finger (60) forms a stop for said stop portion (42) of the driven member (30, 40) in the determined direction of rotation. 14. A method of actuating said control device according to claim 13, characterized in that, during said additional step, said means (50) energy accumulator remains in a substantially discharged state.