Power cut-off module with dielectric barrier

Abstract

The invention relates to a power shut-off module (10) comprising an insulating housing (2), two pairs of fixed contacts (3) and two movable contacts (4) rigidly attached to movable means (5) movable in translation in the housing (2) between an open position and a closed position. The module is characterized in that it comprises an insulation shielding means (50) having a fixed end rigidly attached to the housing (2) and a movable end rigidly attached to the movable means (5) and whose length is variable between an extended position when the movable means (5) is in the open position and a retracted position when the movable means (5) is in the closed position, in this way, a dielectric barrier is produced between the fixed contacts of the same pair of fixed contacts (3).

Description

Technical Field

[0001] The present invention relates to an electrical disconnection module, comprising: an electrically insulating housing; at least one pair of fixed contacts, which include an upstream fixed contact and a downstream fixed contact; and at least one movable contact fixed to the device, which can be translatedly moved in the housing relative to the at least one pair of fixed contacts between an open position and a closed position. Background Art

[0002] The invention is applied to a current disconnect device in which disconnection of electrical contacts can be achieved by linear translational movement of a movable contact relative to a fixed contact. In such a disconnect module, the electrical characteristics of the disconnect device are determined in part by the volume of air in the disconnect chamber and the control of the dielectric separation between the fixed current input contact and the fixed current output contact. These electrical characteristics correspond to the ability of the disconnect device to manage the arc that is usually generated when the circuit is disconnected and to extinguish it quickly. The disconnect chamber is defined by the inner wall of the housing and includes a fixed contact and a movable contact, between which an arc may be generated.

[0003] The linear disconnect module generally comprises a movable rod carrying a movable contact and having a length less than the useful length of the disconnect housing so as to enable it to travel on its path between the open and closed positions and vice versa without colliding with the housing.

[0004] Figure 1 An example of a disconnection module 1 of the prior art is illustrated, comprising: an electrically insulating housing 2, of which only the lower half 20 is shown; two pairs of fixed contacts 3; and two movable contacts 4, which are carried on a movable device, which is generally referred to as a rod 5, which can be moved in translation in the direction of the arrow T. Figure 1 The disconnection module 1 is illustrated in an open position, in which the movable contact 4 is away from the fixed contact 3 and the circuit is open. Figure 1 The end 5a of the movable rod 5 on the right side of the center is close to or against the corresponding transverse wall 22 of the housing, thereby occupying the air volume of the cut-off chamber CC and naturally forming a dielectric separation or dielectric barrier between the upstream fixed contact 3a and the downstream fixed contact 3b of the pair located on the right side. Figure 1 The end 5b of the movable rod 5 on the left side is away from the corresponding transverse wall 23 of the housing, thereby releasing the air volume of the cut-off chamber CC and exposing the upstream fixed contact 3a and the downstream fixed contact 3b of the pair located on the left side to make it possible to guide the arc E between them, as shown in FIG. Figure 2 Thus, in this left-hand portion of the housing 2, when the movable lever 5 is in the disconnected position, the dielectric separation or dielectric barrier between the upstream fixed contact 3a and the downstream fixed contact 3b is destroyed, which limits the electrical performance of the disconnecting device and causes electrical risks to personnel and downstream equipment.

[0005] Publication EP270389A1 describes a multi-pole rotary switch whose rotatable movable rod includes a metal ground shield and is said to provide a disconnect function to maintain isolation between the input and output terminals of the switch. However, this solution is limited to rotary disconnect modules and is not suitable for linear disconnect modules.

[0006] Publications US2007911A and FR2694444A1 describe linear cut-off modules equipped with electrically insulating shielding means, the performance of which depends on the position of a movable rod. Summary of the invention

[0007] The present invention aims to overcome these drawbacks by proposing a deformable dielectric barrier between the mobile rod and the casing of a cut-off module capable of maintaining the dielectric properties necessary to achieve the desired electrical performance of said module, regardless of the position of the mobile rod.

[0008] To this end, the present invention relates to a disconnection module of the type indicated in the preamble, characterized in that it comprises an electrically insulating shielding element arranged in the housing between an upstream fixed contact and a downstream fixed contact of the at least one pair of fixed contacts, the shielding element comprising a fixed end fixed to the housing and a movable end fixed to the movable element, and whose length can be varied between an extended position when the movable element is in the disconnected position and a retracted position when the movable element is in the closed position, so as to produce a dielectric barrier between the upstream fixed contact and the downstream fixed contact of the at least one pair of fixed contacts.

[0009] In a first embodiment, the shielding device may have a telescopic configuration. In this case, it may include at least two sections, including a fixed section fixed to the housing and a movable section fixed to the movable device. The shielding device may further include at least one intermediate section that slides relative to the fixed section and the movable section.

[0010] In this embodiment, the shielding means advantageously comprises translational abutments which are arranged to define the extended position and which are respectively provided between the different segments.

[0011] Preferably, the shielding means and the housing have respective complementary guides arranged to guide the movable section and / or the intermediate section in sliding translation relative to the housing.

[0012] In a second embodiment, the shielding means can be wound and comprises at least one film wound around a rotating axle fixed to the housing, the film comprising a fixed end fixed to the housing and a movable end fixed to the movable means.

[0013] In a third embodiment, the shielding means may be extendable and comprise at least one corrugated membrane comprising a fixed end fixed to the housing and a movable end fixed to the movable means. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The invention and its advantages will become more apparent from the following description of several embodiments given by way of non-limiting examples with reference to the accompanying drawings, in which:

[0015] Figure 1 is a perspective view of a cut-off module according to the prior art, the cut-off module being in an off position and without an upper portion of the housing;

[0016] Figure 2 yes Figure 1 Top view of the cutting module;

[0017] Figure 3 It is shown that Figure 1 A perspective view of a similar perspective view of a disconnection module according to the invention in the disconnected position and equipped with shielding means in the extended position;

[0018] Figure 4 is with Figure 3 A view similar to that of FIG. 1 , showing the cut-off module in a closed position and the shielding device in a retracted position;

[0019] Figure 5 yes Figure 3 An exploded view of the cut-off module;

[0020] Figure 6 yes Figure 3 A cross-sectional view of a cut-off module;

[0021] Figure 7 is along the disconnected position Figure 3 A cross-sectional view of a horizontal section VII-VII of the left-hand portion of the cut-off module;

[0022] Figure 8 is along the closed position Figure 4 Section VIII-VIII of the left hand part of the cut module with Figure 7 A view similar to the view of;

[0023] Fig. 9 is along the disconnected position Figure 3 A sectional view of a vertical section IX-IX of the left-hand portion of the cut-off module;

[0024] Fig.10 is along the closed position Figure 4 The cross section XX of the left hand part of the cut-off module is Fig. 9A view similar to the view of;

[0025] Fig.11 is an exploded view of a cut-off module and a shielding device according to a first variant of the present invention;

[0026] Fig.12 is in the disconnected position Fig.11 A perspective view of a cut-off module and a shielding device;

[0027] Fig.13 is a perspective view of a cut-off module and a shielding device according to a second variant of the present invention; and

[0028] Fig.14 The cutting module and the shielding device according to the third variant of the present invention are Fig.13 A view similar to the view of . DETAILED DESCRIPTION

[0029] In the exemplary embodiments shown, identical elements or parts have the same reference numerals. Furthermore, terms with relative meanings (e.g., vertical, horizontal, right, left, front, rear, above, below, etc.) must be interpreted as being under normal conditions of use of the invention and as shown in the accompanying drawings. The axes X, Y and Z themselves are represented by Figure 1 The orthogonal reference system shown is defined. Moreover, the geometrical positions indicated in the description and claims (e.g. "perpendicular", "parallel", "symmetrical") are not limited to the strictly geometrically defined meaning, but encompass geometrical positions close to them, i.e. within a certain tolerance acceptable in the technical field in question, without affecting the result obtained. Such tolerance is particularly introduced by the adverb "substantially", which term does not have to be repeated before each adjective.

[0030] refer to Figures 3 to 14, the electrical disconnection module 10 according to the invention comprises an electrically insulating housing 2 consisting of two half-shells: a lower half-shell 20 and an upper half-shell 21, which are assembled and fixed by any known means, such as screw fastening members (not shown). The disconnection module 10 comprises at least one pair of fixed contacts 3 (two pairs of fixed contacts 3 in the example shown), each pair comprising an upstream fixed contact 3a and a downstream fixed contact 3b if the current flows from top to bottom in the figure. Each fixed contact 3 is generally composed of a strip 30 produced from an electrically conductive material and comprises a connection pad 31 located outside the housing 2, which is provided with a hole 32 for fixing a power cable (not shown). The disconnection module 2 comprises at least one movable contact 4, and in the example shown two movable contacts 4, which are carried and fixed to a movable device 5, generally referred to as a movable rod. Each movable contact 4 is generally composed of two strips 40 produced from an electrically conductive material, which are superimposed and fixed to each other by a spring member 41 so as to form a clamp capable of being assembled to the corresponding strip 30 of the fixed contact 3. This type of abutment is referred to as a sliding contact; however, this example is not limiting.

[0031] The movable member 5 carrying the movable contact 4 is mounted in the housing 2 so as to be movable relative to the fixed contact pair 3 in the disconnect position ( Figure 3 ) and closed position ( Figure 4 ) in the direction of arrow T, in the disconnected position the electrical contacts are disconnected and the circuit is interrupted, and in the closed position the electrical contacts are closed and the circuit is completed. To this end, the housing 2 and the movable device 5 comprise complementary mating shapes, thereby ensuring a guiding function for translation along the longitudinal axis Y of the housing; examples are grooves and ribs. They may also comprise end-of-travel abutments in order to define the extreme positions of the movable device 5, which correspond to the disconnected position ( Figure 3 ) and closed position ( Figure 4 ); an example is a shoulder with a complementary shape.

[0032] Each pair of fixed contacts 3 and its corresponding movable contact 4 define between them a cut-off area in which an arc may extend, in particular when the circuit is disconnected. Thus, the cut-off module 10 comprises at least one cut-off chamber, and in the example shown two cut-off chambers CC, which are delimited by the inner wall of the housing 2 and each comprise a cut-off area for managing the arc in order to cut off the current.

[0033] The disconnection chamber CC on the right side of the figure comprises the movable device 5 in the disconnected position. It thus occupies the air volume of this disconnection chamber CC, isolating the upstream fixed contact 3a from the downstream fixed contact 3b, forming a dielectric barrier and promoting the extinguishing of the arc and the interruption of the current.

[0034] According to the invention, the disconnection chamber CC, located on the left side of the figure, comprises an electrically insulating shielding device 50, which is added to the housing 2 between the upstream fixed contact 3a and the downstream fixed contact 3b, so as to achieve these same functions, namely occupying the air volume of this disconnection chamber CC, isolating the upstream fixed contact 3a from the downstream fixed contact 3b, forming a dielectric barrier, and promoting the extinguishing of the arc and the interruption of the current. It can be recalled that in the absence of this shielding device 50, according to Figure 1 and Figure 2 , an arc E is formed between the upstream fixed contact 3a and the movable contact 4, and then between the movable contact 4 and the downstream fixed contact 3b, respectively. In particular, when the circuit is disconnected, there is a risk of displacement and direct establishment between the upstream fixed contact 3a and the downstream fixed contact 3b, thereby maintaining the current flow when the disconnection module 1 is in the disconnected position, thereby creating a dangerous situation for personnel and downstream equipment.

[0035] exist Figures 3 to 10 In the example illustrated, the shielding device 50 is retractable in construction and comprises at least two segments, and in this example three segments 51, 52, 53, this number of segments being non-limiting, which are arranged to slide relative to each other and adapt the length of the shielding device 50 to the length of the cut-off chamber CC according to the displacement of the movable device 5 between two extreme positions. Therefore, the shielding device 50 is designed to have a variable length between two end positions, namely the extended position when the movable device 5 is in the open position and the retracted position when the movable device 5 is in the closed position, so that the shielding device performs its dielectric barrier function regardless of the position of the movable device 5.

[0036] The shielding device 50 has a three-dimensional polyhedron shape (see Figure 5 and Figure 6 ) so as to match the shape of the inner wall of the housing 2 and occupy the main part of the volume of the cutting chamber CC. In addition, these three-dimensional shapes are complementary to the three-dimensional shape of the housing 2 and ensure a guiding function in translation along the longitudinal axis Y of the housing 2; examples are grooves and ribs.

[0037] In this example, the shielding device 50 comprises:

[0038] - a fixing section 51 , which is fixed to the housing 2 ;

[0039] a movable segment 53 fixed to the movable means 5 ; and

[0040] - an intermediate section 52 which slides freely on the fixed section 51 and in the movable section 53,

[0041] The cross section of the fixed section 51 is inscribed in the cross section of the middle section 52, and the cross section of the middle section 52 is inscribed in the cross section of the movable section 53. In this configuration, the fixed section 51 is the smallest and accommodated inside, while the movable section 53 is the largest and arranged outside the shielding device 50. This example is not restrictive, because the opposite configuration may also be suitable, that is, the movable section is the smallest and accommodated inside, while the fixed section is the largest and arranged outside the shielding device (see Fig.11 and Fig.12 ). In this example of a shielding device 50 of telescopic construction, when the movable device 5 is in the open position, the length of the segments 51, 52, 53 in the extended position must cover the total length of the cutting chamber CC without interruption. In addition, when the movable device 5 is in the closed position, the length of these segments 51, 52, 53 must allow them to return to the retracted position in the remaining volume of the cutting chamber CC.

[0042] The fixing section 51 is constituted by a hollow part comprising a front wall 54 and a peripheral wall 55 extending perpendicularly from the front wall 54 in the direction of the movable device 5 and on the longitudinal axis Y of the housing. The front wall 54 abuts the corresponding transverse wall 23 of the housing. It is provided with a fixing lug 56 which will fit into a corresponding recess 57 provided in the housing 2 so as to keep this first section in a fixed position and to create a fixing point for the shielding device 50. The fixing lug 56 may or may not extend inside the fixing section 51 so as to act or not act as a reinforcement. The peripheral wall 55 has a polygonal section constituted by a plurality of facets at right angles to each other so as to form a U-shaped external rib comprising at least two lateral ribs 58, a lower rib 59 and an upper rib 60 respectively connected together by an L-shaped shoulder 61. All or part of the free edge of the peripheral wall 55 comprises a translation abutment 62 arranged to cooperate with a complementary translation abutment provided on the intermediate section 52. The translation abutment 62 may be formed by a continuous or discontinuous edge folded outwards at a right angle, for example. Any other equivalent means may be suitable.

[0043] The intermediate section 52 is constituted by an annular portion comprising a peripheral wall 63 extending along the longitudinal axis Y of the housing. The peripheral wall 63 has a polygonal cross section complementary to that of the fixed section 51, consisting of a plurality of sections at right angles to one another, so as to produce, on the one hand, lateral grooves 64, lower grooves 65 and upper grooves 66, and, on the other hand, U-shaped lateral ribs 67, lower ribs 68 and upper ribs 69, which are connected to one another respectively by L-shaped shoulders 70. The lateral grooves 64, lower grooves 65 and upper grooves 66 are arranged to slide axially with operating clearance on the lateral ribs 58, lower ribs 59 and upper ribs 60 of the fixed section 51. All or part of the free edge of the peripheral wall 63 on the side of the fixed section 51 comprises a translation abutment 71, so as to cooperate with the translation abutment 62 of the fixed section 51, which is constituted by a continuous or discontinuous inwardly folded edge and defines the extended position of the intermediate section 52. The lower rib 68 and the upper rib 69 are arranged to slide axially with operating clearance in the lower groove 24 and the upper groove 25 of the housing 2. All or part of the free edge of the peripheral wall 63 on the side of the movable segment 53 includes a translation abutment 72 to cooperate with a complementary translation abutment provided on the movable segment 53.

[0044] The movable section 53 is constituted by two halves, each of which comprises a three-dimensional side wall 73, one part of which (on the left in the figure) is solid and has a mutually fitting shape complementary to the shape of the corresponding face of the intermediate section 52, and the other part (on the right in the figure) is perforated and comprises two superimposed windows 74 separated by a fixing rod 75. Thus, each side wall 73 of the movable section is fitted laterally to the movable device 5 to be fastened thereto by means of screws 76 or any other equivalent fastener, which may be removable or non-removable. To this end, the perforated part of each side wall 73 is fitted on the strip 40 of the movable contact 4 passing through the superimposed windows 74, and the solid part of each side wall 73 is cantilevered in the direction of the intermediate section 52 at the left-hand end 5a of the movable device 5. Each side wall 73 of the movable section 53 comprises an inner groove 77 arranged to slide on a corresponding lateral rib 67 of the intermediate section 52 with an operating clearance, and an outer groove 78 which opens an axial passage for the corresponding strip 30 of the fixed contact 3 during displacement of the movable device 5. Part or all of the free edge of the side wall 73 of the movable section 53 comprises a translation abutment 79 constituted by a continuous or discontinuous inwardly folded edge, so as to cooperate with the translation abutment 72 of the intermediate section 52, thereby defining the extended position of the intermediate section 52 and therefore of the entire shielding device 50.

[0045] Furthermore, the combination of U-shaped guide ribs and grooves and L-shaped shoulders provided on the segments 51 , 52 , 53 of the shielding element 50 , respectively, also ensures centering of the segments relative to each other and relative to the housing 2 .

[0046] The operation of the shielding device 50 is simple and automatic. When the movable device 5 is in the disconnected position, the shielding device 50 is in the extended position, such as Figure 3 , Figure 7 , Fig. 9 As shown: the axial position of the segments 51, 52, 53 relative to each other is defined by the contact between the corresponding translation abutments 62, 71 and 72, 79. When the movable device 5 is displaced from the open position to the closed position, the shielding device 50 is folded into the retracted position, as shown in FIG. Figure 4 , Figure 8 , Fig.10 As shown. During its translation, the movable device 5 displaces the movable section 53, whereby the movable section slides on the intermediate section 52 until it comes into contact with the translation abutment 72 of the intermediate section 52. Next, the movable section 53 pushes the intermediate section 52 sliding on the fixed section 51 until it comes into contact with the transverse wall 23 of the housing 2. Then, the movable device 5 is in the closed position and the shielding device 50 is in the retracted position. Conversely, when the movable device 5 is displaced from the closed position to the open position, it drives the movable section 53, whereby the movable section slides on the intermediate section 52 until it hits the translation abutment 72 of the intermediate section 52. Next, the movable section 53 pulls the intermediate section 52, which slides on the fixed section 51 until it hits the translation abutment 62 of the fixed section 51. Then, the movable device 5 is in the open position and the shielding device 50 is in the extended position.

[0047] Obviously, reference Figures 3 to 10 The described architecture of the shielding device 50 and its translational guide means, its translational abutments, its centering means, etc. are not limiting; any other technically equivalent embodiment is suitable.

[0048] To illustrate possible alternative embodiments, Fig.11 and Fig.12 Another shielding device 80 is shown in a telescopic configuration consisting of three segments, comprising:

[0049] - a fixing section 81 , consisting of two parallel side walls 82 , projecting axially from the transverse wall 23 of the housing 2 , forming an integral or non-integral part of the housing;

[0050] a movable segment 83 constituted by an intermediate wall 84 , protruding axially from the movable means 5 , forming an integral or non-integral part thereof, and terminating in a translational abutment 85 ; and

[0051] An intermediate section 86 which slides freely in the fixed section 81 and on the movable section 83 .

[0052] As in the previous examples, the intermediate section 86 is constituted by an annular portion comprising a peripheral wall 87 extending along the longitudinal axis Y of the housing 2. The peripheral wall 87 has a polygonal section complementary to that of the housing 2, the fixed section 81 and the movable section 83, so as to provide mutual guidance in terms of translation and centering of the parts, thereby ensuring an operating clearance allowing them to slide. In the same way, the sections 81, 83, 86 comprise a translation abutment 85 which allows the shielding device 80 to move from a retracted position, in which the sections 81, 83, 86 overlap when the movable device 5 is in the closed position, to an extended position, in which the sections 81, 83, 86 overlap when the movable device 5 is in the open position ( Fig.12 ), the segments 81, 83, 86 are end to end, and vice versa. In this variant, the movable segment 83 slides in the intermediate segment 86, and the intermediate segment 86 slides in the fixed segment 81. The intermediate segment 86 can also cooperate with a translation abutment provided in the housing 2 so as to define its extended position.

[0053] By way of non-limiting example, Fig.13 and Fig.14 Other alternative embodiments of the shielding means 90, 100 according to the invention are also illustrated, which make it possible to implement the same functions as described above in order to achieve the same results, including the creation of a dielectric barrier between the upstream fixed contact 3a and the downstream fixed contact 3b in the disconnection chamber CC, regardless of the axial position of the movable means 5.

[0054] exist Fig.13 , the shielding device 90 can be wound. It includes a flexible membrane 91 so that it can be wound around a rotating axle 92 fixed to the housing 2. The rotating axle 92 extends vertically between the lower half housing 20 and the upper half housing (not shown) near the transverse wall 23 of the housing. The rotating axle 92 is mounted in the housing so as to rotate freely around itself, or includes a double axle, the first axle of which is fastened to the housing, and the second axle of which is rotatably movable around the first axle. The shielding device 90 includes: a fixed end, which corresponds to the inner end of the membrane 91 fastened to the rotating axle 92; and a movable end 93, which corresponds to the outer end of the membrane 91 fastened to the movable device 5 by any compatible fastening means. The movable end 93 of the membrane 91 can be clamped and combined between two jaws 94 fastened together by screws 95 or the like, and the jaws 94 are fixed to the corresponding left-hand end 5a of the movable device 5. The shielding device 90 also comprises a spring member (not shown) which ensures that the membrane 91 can be wound around its rotational axle 92. Thus, when the movable device 5 is displaced to the disconnected position ( Fig.13 ), the film 91 unwinds under the action of the traction applied thereby, and automatically rolls up under the action of its return member when the traction stops and the movable device 5 is displaced to the closed position.

[0055] exist Fig.14, the shielding device 100 is extendable. It comprises an accordion-type pleated membrane 101 which forms a deformable bellows between a fixed end 102 fixed to the transverse wall 23 of the housing 2 by means of a fixing tab 103 fitted into a recess 57 of the housing and a movable end 104 fixed to the movable device 5 by any compatible fastening means, for example between two jaws 105 fixed to the left-hand end 5a of the movable device 5. Thus, when the movable device 5 is displaced to the disconnected position ( Fig.14 ), the membrane 101 unfolds or extends under the action of the traction applied thereby, and automatically folds or contracts under the action of its elasticity when the traction stops and the movable device 5 is displaced to the closed position.

[0056] The present invention is obviously not limited to the exemplary embodiments described, but includes any modifications and variations within the scope of the appended claims, which are obvious to those skilled in the art. In addition, the technical features of the various embodiments and variations described above can be combined in whole or only in part.

Claims

1. An electrical disconnection module (10), comprising: An electrically insulating housing (2); At least one pair of fixed contacts (3), comprising an upstream fixed contact (3a) and a downstream fixed contact (3b); and at least one movable contact (4) fixed to a device (5), the device (5) being translatably movable in the housing (2) between an open position and a closed position relative to the at least one pair of fixed contacts (3), the disconnection module being characterized in that it comprises an electrically insulating shielding device (50, 80, 90, 100), the electrically insulating shielding device (50, 80, 90, 100) being arranged in the housing (2) between the upstream fixed contact (3a) and the downstream fixed contact (3b) of the at least one pair of fixed contacts (3), the shielding device comprising a fixed end fixed to the housing (2) and a movable end fixed to the movable device (5), and the length of the shielding device being variable between an extended position when the movable device (5) is in the open position and a retracted position when the movable device (5) is in the closed position, so as to generate a dielectric barrier between the upstream fixed contact (3a) and the downstream fixed contact (3b) of the at least one pair of fixed contacts (3).

2. The electrical disconnection module according to claim 1, characterized in that: The shielding device (50, 80) has a telescopic structure.

3. The electrical disconnection module according to claim 2, characterized in that: The shielding device (50, 80) comprises at least two sections (51, 53; 81, 83), and the at least two sections (51, 53; 81, 83) comprise a fixed section (51, 81) fixed to the housing (2) and a movable section (53, 83) fixed to the movable device (5).

4. The electrical disconnection module according to claim 3, characterized in that: The shielding device (50, 80) further comprises at least one intermediate section (52, 86), and the at least one intermediate section (52, 86) slides relative to the fixed section (51, 81) and the movable section (53, 83).

5. The electrical disconnection module according to any one of claims 3 and 4, characterized in that: The shielding device (50, 80) comprises a translation abutment (62, 71, 72, 79; 85) which is arranged to define the extended position and is respectively arranged between different sections (51, 52, 53; 81, 83, 86).

6. The electrical disconnection module according to any one of claims 1 to 5, characterized in that: The shielding device (50, 80) and the shell (2) respectively have complementary guide members (24, 68; 25, 69), and the guide members (24, 68; 25, 69) are arranged to guide the movable section (53, 83) and / or the intermediate section (52, 86) to slide and translate relative to the shell (2).

7. The electrical disconnection module according to claim 1, characterized in that: The shielding device (90) is capable of being wound and comprises at least one membrane (91) wound around a rotating axle (92) fixed to the housing (2), the membrane (91) comprising a fixed end fixed to the housing (2) and a movable end (93) fixed to the movable device (5).

8. The electrical disconnection module according to claim 1, characterized in that: The shielding device (100) is extendable and comprises at least one corrugated membrane (101), the corrugated membrane (101) comprising a fixed end (102) fixed to the housing (2) and a movable end (104) fixed to the movable device (5).

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