LOCKING SYSTEM FOR CIRCUIT BREAKER

Description

[0001] The present invention relates to a locking system for a circuit breaker.

[0002] The term circuit breaker here includes in particular RCBO type differential circuit breakers (for “Residual Circuit Breaker with Over-current”) and miniature circuit breakers known as MCB (for “Miniature Circuit Breaker”).

[0003] Such a locking system is, for example, useful for preventing the operation of a circuit breaker, for example during an intervention.

[0004] Such a system prevents, for example, the movement of a circuit breaker handle.

[0005] Document EP 0 604 331 A1 describes a device for locking a manual control handle of a modular electrical device, for example a circuit breaker. The device comprises a lever movable between an unlocked position and a locked position and a locking pin.

[0006] The system is, for example, attached to the corresponding circuit breaker using a padlock and then blocks the passage of the circuit breaker handle so as to prevent the circuit breaker from being operated, either manually or automatically.

[0007] However, such a system is not suitable for remaining in position in the absence of a padlock.

[0008] This means that the locking system must be completely removed every time the circuit breaker is operated. This is inconvenient. Furthermore, there is a risk that the locking system will be misplaced or subsequently replaced on the wrong circuit breaker on a busbar.

[0009] An aim of the invention is therefore to propose a locking system for a circuit breaker designed to be left permanently on a circuit breaker.

[0010] For this purpose, the invention relates to a locking system according to claim 1.

[0011] The presence of at least two locking system configurations allows the locking system configuration to be selected according to the desired use. The locked configuration prevents the circuit breaker from being operated manually or automatically. The free configuration allows the locking system to be left in place without preventing the circuit breaker from operating.

[0012] The circuit breaker locking system may further have one or more features of claims 2 to 10, considered individually or in all technically possible combinations.

[0013] Other features and advantages of the invention will become apparent upon reading the following description of embodiments of the invention, given by way of example only and with reference to the drawings, in which: [ Fig 1 ] there figure 1 is a three-dimensional representation of a circuit breaker locking system according to a first embodiment, [ Fig 2 ] there figure 2 is a three-dimensional representation of the system of the figure 1 on a circuit breaker, in a free configuration, [ Fig 3 ] there figure 3 is a three-dimensional representation of the system of the figure 1 on a circuit breaker, in an intermediate configuration, [ Fig 4 ] there figure 4 is a three-dimensional representation of the system of the figure 1 between a circuit breaker and a busbar, in a locked configuration, [ Fig 5 ] there figure 5 is a three-dimensional representation of a circuit breaker locking system according to a second embodiment, in a free configuration, and [ Fig 6 ] there figure 6 is a three-dimensional representation of the system of the figure 5 , in an intermediate configuration.

[0014] An example of a locking system 10 for a circuit breaker 12 according to a first embodiment is shown in the figures 1 à 4 .

[0015] The locking system 10 is adapted to be fixed to a circuit breaker 12, more particularly between the central edge of an insulated busbar 14 and the circuit breaker 12.

[0016] The locking system 10 is adapted to be fixed on an upper part of the circuit breaker 12.

[0017] The upper part of RCBO and MCB circuit breakers is generally similar, so the same locking system is then compatible with different types of circuit breakers.

[0018] Circuit breaker 12 has a front 15.

[0019] The circuit breaker 12 has, for example, a handle 16 capable of moving between an active position and an inactive position. The handle 16 moves here between the active position and the inactive position by displacement, here by translation, along a longitudinal direction X.

[0020] We further define a transverse direction Y perpendicular to said longitudinal direction X.

[0021] The lever 16 extends here mainly in the transverse direction.

[0022] The lever 16 is here arranged on the facade 15, more particularly in a central portion of the facade.

[0023] In the example shown, the circuit breaker 12, more particularly the central portion of the facade 15, is provided with a path for movement of the handle 16. The path is, for example, delimited by longitudinal edges 18. The handle 16 is able to move parallel to the longitudinal edges between said longitudinal edges.

[0024] The circuit breaker 12 is here provided with at least two, here two, orifices 19 arranged between the position of the handle in the active position and the position of the handle in the inactive position along the longitudinal direction. More particularly, the orifices are delimited by the longitudinal edges 18, here one orifice per longitudinal edge.

[0025] The facade 15 in the upper part of the circuit breaker 12 here extends back from the central portion.

[0026] The circuit breaker 12 also has an upper face 19.

[0027] The upper face 19 is intended to extend against or opposite the central edge of an insulated busbar set 14.

[0028] The upper part of the facade 15 extends between the central portion and the upper face 19.

[0029] A plurality of circuit breakers may be arranged side by side in the transverse direction.

[0030] The longitudinal and transverse directions relative to the locking system 10 are defined as the directions previously defined relative to a circuit breaker in the frame of reference of the locking system 10 when it is installed on a circuit breaker.

[0031] The locking system 10 here comprises a base 20, an elastic biasing element 22 and a cover 24.

[0032] When the locking system 10 is placed on the circuit breaker 12, the base 20 extends into the space freed by the removal of the faceplate 15 in the upper portion of the circuit breaker 12.

[0033] When the locking system 10 is placed on the circuit breaker 12, the base 20 is aligned with the circuit breaker 12 in the longitudinal direction X.

[0034] The base 20 has a shape such that it can be inserted against the upper part of the circuit breaker 12, here between the circuit breaker 12 and the central edge of an insulated busbar 14.

[0035] In the example shown, the base 20 has a main body 26.

[0036] The base 20 also has a right-angle piece 28.

[0037] The main body 26 here has an accessible face 30.

[0038] The accessible face 30 is here adapted to extend in continuity with the central portion of the facade 15 of the circuit breaker 12.

[0039] The main body 26 further has a bottom 31 opposite the accessible face 30.

[0040] The bottom 31 is adapted to extend against the circuit breaker, more particularly against the front 15 in the recessed upper portion.

[0041] The main body 26 has a first side 32 and a second side 34 opposite the first side 32, here in the longitudinal direction.

[0042] The accessible face 30 and the bottom 31 connect the first side 32 and the second side 34.

[0043] The first side 32 is adapted to extend against the circuit breaker 12.

[0044] The second side 34 is adapted to extend opposite or against the insulated busbar 14.

[0045] The base 20 here has a shape such that, when the locking system 10 is arranged on the circuit breaker 12, the second side 34 extends level with the upper face 19 of the circuit breaker 12.

[0046] The right-angle piece 28 is fixed to the second side 34 of the main body 26.

[0047] The right-angled piece comprises a first portion 36 and a second portion 38.

[0048] The second portion 38 is substantially perpendicular to the first portion 36.

[0049] The first portion 36 extends partially against the second side 34 of the main body 26.

[0050] The first portion 36 comprises two arms 40, here each arranged at an edge of the second side 34 of the main body in the transverse direction Y.

[0051] Each arm 40 extends substantially in the direction opposing the bottom 31 and the accessible face 30.

[0052] In the example shown, each arm extends beyond said second side 34, forming projections 42, more particularly beyond the bottom 31.

[0053] Each projection 42 is provided with a raised element 44 intended to be inserted into a complementary indexing element of the circuit breaker 12.

[0054] The second portion 38 extends in the continuity of the accessible face 30 of the main body 26.

[0055] The second portion 38 is adapted to extend against the busbar 14.

[0056] The second portion 38 is here a solid face, substantially rectangular.

[0057] In the example shown, the base 20 further comprises a pivot 46 and / or a guide element 48 and / or a ring 50.

[0058] Pivot 46 has a pivot axis A.

[0059] The pivot axis A extends here in the transverse direction.

[0060] The pivot 46 is arranged on the accessible face 30 of the main body 26, more particularly here on an end portion of the accessible face 30 adjacent to the first side 32.

[0061] The guide element 48 is here adapted to guide in translation in a translation direction.

[0062] The guide element 48 is, in the example shown in the figures 1 à 4 , a system of slot(s) or guide rail(s).

[0063] The guide element 48 here has two locations, here extreme, corresponding to the ends of the rail(s) or slot(s), more particularly a proximal location and a distal location.

[0064] The distal location is arranged to extend closer to the handle 16 than the proximal location, when the locking system 10 is positioned on the circuit breaker 12.

[0065] The translation direction is here parallel to the longitudinal direction X.

[0066] In the example shown, the guide element 48 is delimited here by a tongue 52 extending between two ends linked to a support 54.

[0067] The tab 52 extends away from the support 54 except for its bonded ends.

[0068] The bound ends are opposite in the translation direction.

[0069] The support 54 is, for example, a flat surface.

[0070] The support 54 is adapted to extend against the facade 15, more particularly against the central portion of the facade.

[0071] The support 54 extends here between the pivot 46 and a free end.

[0072] The ring 50 delimits an opening 56.

[0073] The opening 56 is adapted for the passage of a locking element 58, for example a padlock, more particularly the shackle of a padlock.

[0074] The opening 56 is transverse in the translation direction, or the longitudinal direction X.

[0075] The ring 50 extends primarily in a plane perpendicular to the translational direction, or the longitudinal direction.

[0076] A padlock whose shackle is inserted into the opening 56 then has limited space requirements in the transverse direction Y, taking into account the orientation of the opening 56.

[0077] This makes it possible in particular to limit the risk of the said padlock interacting with a circuit breaker adjacent to the circuit breaker equipped in the transverse direction Y.

[0078] In the example shown, the ring 50 extends to the free end of the support 54. More particularly, the free end of the support 54 partially forms the ring 50.

[0079] The elastic stressing element 22 here extends mainly in the longitudinal direction X.

[0080] The elastic stress element 22 is here a spring, more particularly a part made of a metal wire and with elastic deformation in normal use of the locking system 10.

[0081] The elastic stress element 22 has a resting shape in the absence of external stress.

[0082] The elastic stressing element 22 here has branches 60.

[0083] More particularly, the elastic biasing element 22 consists of two branches 60 and a central portion.

[0084] The branches 60 are secured on either side of the central part.

[0085] The central part here extends in the transverse direction.

[0086] The branches 60 extend from the central portion towards the central portion of the facade 15 when the locking system is in position.

[0087] The elastic stressing element 22 has a main portion symmetrical with respect to a plane of symmetry.

[0088] The central part is included in the main portion.

[0089] The elastic stress element 22 has a branch 60 on each side of the plane of symmetry.

[0090] In the embodiment shown, in the main portion, the branches 60 each extend in a respective plane perpendicular to the transverse direction Y, in the rest form of the elastic stressing element 22.

[0091] The branches 60 here each comprise a respective end portion 62.

[0092] The main portion of the elastic biasing element 22 comprises the entire elastic biasing element 22 except for the end portions 62.

[0093] Each branch 60 here comprises a portion of the main portion adjacent to the end portion 62.

[0094] In the intermediate portion 63, each branch 60 forms an angle strictly greater than 70° with the longitudinal direction X. More particularly, the intermediate portion extends perpendicular to the longitudinal directions X and transverse Y, to within 5°.

[0095] The intermediate portion 63 is such that the end of the intermediate portion 63 secured to the end portion 62 is configured to be closer to the facade 15 than its opposite end.

[0096] The respective end portion 62 of each branch extends in the transverse direction to within 5°.

[0097] The respective end portion 62 of each branch extends from the intermediate portion 63 outwards, i.e. away from the other branch.

[0098] The branches 60, more particularly only the end portions 62, are asymmetrical with respect to the plane of symmetry.

[0099] More particularly, one of the branches 60 has an end portion 62 longer than the other branch.

[0100] This allows in particular that the locking system 10 adapts to different widths of movement path of the lever 16.

[0101] The branches 60 are adapted to be brought closer to each other relative to the rest shape of the elastic stressing element 22 by action on said branches 60.

[0102] More particularly, an operator is likely to press the branches 60 towards each other, so as to cause the branches 60 to move closer together, more particularly in the transverse direction Y.

[0103] The elastic biasing element 22 exerts a restoring force on the branches 60 towards its rest shape, i.e. here separating the branches 60, here in the transverse direction Y.

[0104] When the operator releases the branches, the elastic biasing element 22 thus returns to its rest shape.

[0105] The elastic biasing element 22, more particularly the central portion of the elastic biasing element 22, cooperates with the guide element 48.

[0106] More particularly, the guide element 48 is adapted to guide a movement of the elastic biasing element 22 relative to the base 20.

[0107] In the example shown, the central portion extends between the tab 52 and the support 54.

[0108] The elastic stressing element 22 is here movable in translation relative to the base 20.

[0109] The elastic biasing element 22 is movable relative to the base 20 between a so-called free position, shown in the figure 2 , and a so-called locking position, shown on the figures 3 And 4 .

[0110] In the free position, the central portion of the resilient biasing element 22 extends to the proximal location of the guide element 48.

[0111] In the locking position, the central portion of the resilient biasing member 22 extends to the distal location of the guide member 48.

[0112] The elastic biasing element 22 is such that, in the free position, the end portions 62 are configured to extend between the base 20 and the path of movement of the handle 16, at a distance from said path, more particularly in the longitudinal direction X, when the locking system 10 is arranged on the circuit breaker 12.

[0113] The elastic biasing element 22 is such that, in the locking position, the end portions 62 are configured to extend over the path of movement of the handle 16, when the locking system 10 is arranged on the circuit breaker 12. The end portions are, for example, adapted to cooperate with the orifices 19 of the circuit breaker 12 described previously. More particularly, each end portion 62 is arranged to cooperate with a given orifice of the circuit breaker.

[0114] The cover 24 is secured to the base 20, here at the level of the pivot 46.

[0115] The cover 24 is movable between an open position, shown in the figures 1 à 3 , and a closed position, shown on the figure 4 , relative to base 20.

[0116] More particularly, the cover 24 is movable relative to the base 20 in rotation around the pivot 46.

[0117] The cover 24 has an outer surface 64 and an inner surface 66.

[0118] In the open position, the biasing element 22 and, if applicable, the ring 50 are accessible.

[0119] The outer surface 64 extends opposite the accessible face 30 of the main body 26 of the base 20. The inner surface 66 is accessible.

[0120] In the closed position, the cover 24 covers the elastic biasing element 22.

[0121] More particularly, the inner surface 66 extends opposite the elastic biasing element 22. The outer surface 64 of the cover 24 is accessible.

[0122] In position on the circuit breaker, in the closed position of the cover 24, the biasing element 22 is arranged in the space between the circuit breaker 12 and the cover 24.

[0123] The cover 24 here has a through opening 68 arranged such that in the closed position of the cover, the ring 50 passes through the opening 68.

[0124] More particularly, the opening 68 is positioned and sized such that, when the cover 24 is moved to the closed position, the ring 50 partially passes through the opening 68. More particularly, a distal portion of the ring 50, opposite the support 54, passes through the opening 64.

[0125] The cover 24 further has at least one, here one, projecting element 70.

[0126] The at least one protruding element 70 extends here from the inner surface 66.

[0127] The projecting element 70 is arranged to extend between the branches 60 of the elastic stressing element 22 in the closed position of the cover 24, more particularly between the branches 60 in the transverse direction Y.

[0128] The projecting element 70 thus prevents the branches 60 from coming together in the closed position of the hood 24.

[0129] The general operation of the previously described locking system 10 will now be described.

[0130] The locking system 10 has a free configuration, shown in the figure 2 , and a locked configuration, shown in the figure 4 , and here in addition an intermediate configuration, represented on the figure 3 .

[0131] In the free configuration, the elastic biasing element 22 is in the free position.

[0132] More particularly, the free configuration of the locking system corresponds to the situation in which the elastic biasing element 22 is in the free position and the cover 24 is in the open position.

[0133] In the intermediate configuration, the elastic biasing element 22 is in the locking position.

[0134] More particularly, in the example described, the intermediate configuration of the locking system 10 corresponds to the situation in which the elastic biasing element 22 is in the locking position and the cover 24 is in the open position.

[0135] In the locked configuration, the resilient biasing element 22 is in the locked position.

[0136] More particularly, in the example described, the locked configuration of the locking system 10 corresponds to the situation in which the elastic biasing element 22 is in the locked position and the cover 24 is in the closed position.

[0137] In each of the positions, the locking system 10 is adapted to be fixed to a circuit breaker 12. More particularly, the base 20 is adapted to be inserted between the circuit breaker 12 and the central edge of an insulated busbar 14, so that the locking system 10 is held on the circuit breaker 12.

[0138] The possible projections 42 here help to maintain the base 20 in its location relative to the circuit breaker 12.

[0139] In one example of using the locking system 10, the locking system 10 in a free configuration is provided and positioned on the circuit breaker 12, as previously described.

[0140] The circuit breaker handle 16 is capable of moving between the inactive position and the active position.

[0141] Circuit breaker 12 is operating normally.

[0142] The elastic biasing element 22 is then moved into the locking position.

[0143] More particularly, a force is exerted, for example by an operator, on each branch 60 of the elastic biasing element 22 so as to bring them together, and the elastic biasing element 22 is moved into its locking position, here by translation, guided by the guide element 48.

[0144] When the elastic biasing element 22 reaches its locking position, here when the elastic biasing element 22 extends to the distal location of the guide element 48, the end portions 62 extend opposite the orifices arranged between the position of the lever in the active position and the position of the lever in the inactive position.

[0145] The force exerted on the branches 60 is then released. The elastic biasing element 22 returns to its rest shape, so that the branches move apart and the end portions 62 are inserted into the orifices.

[0146] The locking system is then in intermediate configuration.

[0147] The cover 24 is then moved to the closed position.

[0148] The ring 50 passes partially through the opening 68 of the cover 24.

[0149] The at least one projecting element 70 keeps the branches 60 at a distance from each other, so that the end portions 62 remain engaged in the orifices arranged between the position of the lever in the active position and the position of the lever in the inactive position.

[0150] The locking system is then in the locked configuration.

[0151] A padlock or bolt is then advantageously fixed so as to pass through the ring 50 and maintain the locking system 10 in the locked configuration and prevent the configuration of the locking system 10 from changing.

[0152] In the locked configuration, circuit breaker operation is prevented.

[0153] More particularly, the movement of the lever 16 between the active position and the inactive position is prevented by the lever 16 being stopped against at least one stop element.

[0154] The at least one stop element notably comprises the elastic stress element 22, more particularly the branches 60.

[0155] In the embodiment shown in the figures 1 à 4 , the at least one stop element further comprises the at least one protruding element 70.

[0156] This then allows any desired intervention or operation to be carried out, in which the operation of the circuit breaker would be detrimental.

[0157] When an operator wishes to make the circuit breaker functional again, he opens the padlock or lock if one has been placed.

[0158] The cover 24 is moved to the open position.

[0159] A force is exerted on the branches 60 so as to bring them together.

[0160] The end portions 62 are here extracted from the orifices arranged between the position of the lever in the active position and the position of the lever in the inactive position.

[0161] The elastic biasing element 22 is moved into a free configuration, so as to free the path of movement of the lever 16.

[0162] The circuit breaker 12 then operates normally again, the locking system 10 still being arranged on said circuit breaker 12.

[0163] A second embodiment of the locking system is shown in the figures 5 And 6 . Only the elements by which the locking system differs from the first embodiment will now be described.

[0164] Identical or similar items have the same numeric reference incremented by 100.

[0165] The second embodiment differs in that the movement of the elastic biasing element 122 between the at least one free position and the locking position is achieved by rotation, more particularly by rotation around an axis of rotation extending substantially in the transverse direction Y.

[0166] More particularly, the base 120 does not include a translational guide element for the elastic stressing element 122.

[0167] In the example shown, the ring 150 forms a rotational guide element for the elastic stressing element 122.

[0168] The ring 150 has a vertex, the vertex being the point of the ring 150 farthest from the base 120.

[0169] At the apex, the ring 150 extends locally in the transverse direction Y. The ring has a local tangent at the apex, the tangent extending in the transverse direction Y.

[0170] The central part of the elastic stress element 122 is here capable of rotating around the ring 150, more particularly around the top of the ring 150.

[0171] The central part forms a loop extending in a plane perpendicular to the transverse direction Y.

[0172] The loop surrounds the top of the ring.

[0173] The resilient biasing element 122 is capable of being moved between a free position, shown in FIG. figure 5 , and a locking position, shown in the figure 6 .

[0174] In the free position, the resilient biasing element 122 is adapted to extend away from the path of movement of the joystick.

[0175] In the locking position, the elastic biasing element 122 is such that the end portions 162 are arranged to extend over the path of movement of the handle. The end portions are, for example, adapted to cooperate with the orifices of the circuit breaker. More particularly, each end portion 162 is arranged to cooperate with a given orifice of the circuit breaker.

[0176] The elastic biasing element 122 advantageously has a shape such that the opening 156 of the ring 150 is not blocked by the presence of the elastic biasing element 122 in the locking position, that is to say that a padlock or bolt handle is capable of being inserted into the opening 156.

[0177] Each branch 160 of the elastic biasing element comprises a main portion and an end portion 162 as previously described.

[0178] Each branch 160 further comprises a connecting portion 180 connecting the central portion to the main portion of the branch.

[0179] The connecting portion 180 is provided to extend against or opposite the ring 150 in the locking position of the elastic biasing element.

[0180] Each connecting portion 180 extends from the central portion to the respective side of the main portion of the corresponding branch relative to the plane of symmetry.

[0181] The connecting portions 180 of the branches 160 have a shape such that a handle of a lock is capable of being inserted into the ring 150 and, here, between the connecting portions 180 of the branches 160.

[0182] More particularly, the connecting portions 180 bypass the opening 156.

[0183] A method of use will now be briefly described with regard to the differences with the first embodiment.

[0184] A locking system 110 corresponding to the second embodiment is provided, in free configuration, i.e. the elastic biasing element 122 in the free position and the cover 124 in the open position.

[0185] The locking system 110 is installed on the circuit breaker as described previously.

[0186] The resilient biasing element 122 is rotated toward its locking position.

[0187] A force is, for example, exerted on the branches 160 so as to bring them together, so as to insert the end portions 162 into orifices arranged between the active position and the inactive position of the lever in the longitudinal direction X.

[0188] The locking system 110 is then in intermediate configuration.

[0189] The cover 124 is then moved to the closed position.

[0190] The central portion of the elastic biasing element 122 and partially the ring 150, and here partially the connecting portions 180 of the branches 160, pass through the opening 168 during rotation of the hood towards its closed position.

[0191] The locking system 110 is then in the locked configuration.

[0192] A padlock handle can be inserted into the opening 156 delimited by the ring, and here between the branches 160, more particularly between the connecting portions 180.

[0193] In an alternative embodiment to the second embodiment, the elastic biasing element is not capable of being driven in rotation around the ring, but around another fixed element of the base.

[0194] The elastic biasing element is, for example, capable of being driven around a guide pivot secured to the support. The guide pivot is, for example, arranged on the support, in the space defined by the ring.

[0195] The guide pivot, for example, partially forms the outline of the opening delimited by the ring.

[0196] The elastic biasing element has a shape such that in the locking position, it allows the passage of a lock handle through the opening delimited by the ring.

[0197] In an alternative embodiment not shown of the first or second embodiment, the locking system does not include a cover.

[0198] The locked configuration of the locking system corresponds to the situation in which the elastic biasing element is in the locking position.

[0199] The free configuration of the locking system corresponds to the situation in which the elastic biasing element is in the free position.

[0200] The elastic stress element has, for example, a stiffness such that the force to be applied to the branches to bring them together is greater than a threshold force of between 20 g and 300 g.

[0201] This makes it possible in particular to limit the risk of the branches approaching by mistake, i.e. without external intervention by an operator, which could cause the end portions of the branches to come out of the holes in the movement path of the lever.

[0202] Alternatively, the locking system comprises a part, other than a cover as described previously, linked to the base, for example to the support, and movable relative to the base, so as to be inserted between the branches of the elastic stress element.

[0203] In all of the embodiments described, the presence of at least one free configuration and one locked configuration of the locking system makes it possible to leave the locking system permanently on the circuit breaker, while allowing the choice of preventing or not preventing normal operation of the circuit breaker.

Claims

1. A locking system (10; 110) for a circuit breaker (12), the locking system (10; 110) comprising at least one stop element (22, 70; 122, 170), the locking system (10; 110) having a free configuration and a locked configuration, the locking system (10; 110) being adapted to be secured to a circuit breaker (12) in the free configuration and in the locked configuration, the locking system (10; 110) being adapted to permit operation of the circuit breaker (12) in the free configuration and for the at least one stop element (22, 70; 122, 170) to prevent operation of the circuit breaker (12), more particularly to prevent any operation of a handle (16) of the circuit breaker (12), in the locked configuration, the locking system comprising a base (20; 120) adapted to be inserted between the central edge of an insulated busbar (14) and the circuit-breaker (12), wherein the at least one stop element (22, 70; 122, 170) comprises at least one resilient biasing element (22; 122) movable relative to the base (20; 120) between at least one free position and a locking position, the resilient biasing element (22; 122) being in the at least one free position in the free configuration of the locking system (10; 110) and in the locking position in the locked configuration of the locking system (10; 110), the movement of the resilient biasing element (22; 122) between the at least one free position and the locking position is achieved by rotation or translation of the resilient biasing element (22; 122).

2. The locking system according to claim 1, wherein the resilient biasing member (22; 122) has legs (60; 160), the legs being adapted to be inserted into corresponding apertures of the circuit breaker in the locked position of the resilient biasing member (22; 122).

3. The locking system according to claim 2, wherein the resilient biasing element (22; 122) has a main portion which is symmetrical with respect to a plane of symmetry, the legs (60; 160) of the resilient biasing element (22; 122) being at least partially asymmetrical with respect to the plane of symmetry.

4. The locking system according to claim 2 or 3, wherein the resilient biasing member (22; 122) has a resting form, the legs (60; 160) being adapted to be movable towards each other relative to the resting form by action on said legs (60; 160), the resilient biasing member (22; 122) exerting a force to return the legs (60; 160) towards the resting form.

5. The locking system according to any one of claims 2 to 4, comprising a cover (24; 124) having a projecting member (70; 170), the cover (24; 124) being movable between an open position and a closed position, the projecting member (70; 170) extending between the legs (60; 160) of the resilient biasing member (22; 122) in the closed position of the cover (24; 124).

6. The locking system according to any one of claims 1 to 5, comprising a cover (24; 124) having a projecting element (70; 170), the cover (24; 124) being movable between an open position and a closed position, the projecting element (70; 170) forming one of at least one stop element (22, 70; 122, 170), the cover (24; 124) being in the open position in the free configuration and in the closed position in the locked position.

7. The locking system according to any one of claims 1 to 6, comprising a ring (50; 150) defining an aperture (56; 156) adapted to receive a padlock or latch in the locked position so as to hold the locking system (10; 110) in said locked position, the aperture (56; 156) passing through the ring in a longitudinal direction (X) of the locking system (10; 110).