WO2013160275A1

WO2013160275A1 - Removable locking device for electrical equipment

Info

Publication number: WO2013160275A1
Application number: PCT/EP2013/058347
Authority: WO
Inventors: Robert Lüscher; Daniel KÄLIN; Peter Von Allmen
Original assignee: Alstom Technology Ltd
Priority date: 2012-04-25
Filing date: 2013-04-23
Publication date: 2013-10-31
Also published as: CN104246951A; EP2842149A1; EP2842149B1; FR2990052A1; IN2014MN02103A; FR2990052B1; CN104246951B

Abstract

The invention relates to a device (50) for locking medium- or high-voltage electrical equipment, comprising a pivotable ratchet (36) and a device (40, 42) for locking the ratchet (36), characterized in that the locking device (50) is removably mountable on the equipment and is capable of locking the ratchet (36) and of locking the locking device (40, 42) when the latter is mounted on the equipment.

Description

REMOVABLE LOCKING DEVICE FOR APPARATUS

ELECTRIC

DESCRIPTION

TECHNICAL AREA

The invention relates to a device for locking an electrical equipment which is intended to prevent the movement of a component of the equipment.

The invention more particularly relates to a locking device which is adapted to be removably mounted on the electrical equipment.

STATE OF THE PRIOR ART

In electrical equipment for a medium or high voltage power transmission line, such as, for example, a power line disconnector, the mobile components able to open or close the current transmission line are driven by a device. control.

This control device comprises in particular a ratchet which is mechanically connected to the moving components and which is movably mounted in the control device between a rest position corresponding to a closed position of the disconnector, and an actuating position corresponding to an open state of the switch.

When an operator must intervene on the disconnector, the control device must be locked in an actuating position, ie say in a position for which the disconnector is open, to guarantee a safe intervention for the operator.

For this, it is known to use a locking device acting mechanically on a component of the control device, to prevent its movement.

US-A-5,577,599 discloses a locking device which is adapted to lock a lever in a predefined position.

According to this document, the locking device comprises cavities of complementary shapes to the levers to be locked.

This locking device is adapted to the blocking of a prominent component and only this component, it can not block other components of the equipment, along with a lever.

Document CA2151867 describes a lever which is able to block the movement of a component of the apparatus, according to the position of actuation of the lever. This lever is thus adapted for blocking a single component of the apparatus.

In addition, the lever is moved to its blocking position only when an operator actuates a push button, it is therefore possible that an operator does not act on the button, which would result in not achieving the blocking.

The object of the invention is to propose a locking device for electrical equipment, preferably for a line disconnector. high voltage current transport, which allows a double locking of the control device, thus ensuring redundancy of the lock.

The invention also aims to provide a locking device that can be implemented on an apparatus that was not designed with this locking device.

STATEMENT OF THE INVENTION

The invention proposes a device for locking a control device of medium or high voltage electrical equipment, the control device comprising a support plate, a ratchet which is pivotally mounted with respect to the support plate around the a first axis between a rest position and an operating position of the apparatus, and a device for locking the ratchet in its rest position, the locking device being movable relative to the support plate between an active position ratchet lock and an inactive position allowing the ratchet to pivot relative to the support plate, characterized in that the locking device is adapted to be mounted on the apparatus removably and is adapted to lock the ratchet in its rest position and lock the locking device in its locking position of the ratchet when mounted on 1 equipment.

Such a locking device makes it possible, while simultaneously immobilizing the ratchet and the means blocking, to ensure redundancy of the locking of the control device. In addition, since the locking device is removable, it can be used successively on several similar devices or be mounted on an apparatus for which such a locking device has not been provided for its design.

Preferably, the locking device comprises a main body which is adapted to come into simultaneous contact with the ratchet and the locking device for their simultaneous locking, and a handle comprising means for securing the locking device on the apparatus.

Preferably, the body comprises a bearing face which is adapted to come into contact with a component of the locking device for locking the locking device.

Preferably, the body comprises means for its positioning transversely and vertically relative to the support plate and in that the handle comprises means for positioning and maintaining the position of the body longitudinally relative to the support plate.

Preferably, the handle comprises a tongue which is adapted to engage in at least one groove complementary to the support plate.

Preferably, the handle is able to deform elastically under manual action to allow the release of the tongue out of the groove. Preferably, the handle consists of a metal blade folded U-shaped, a first branch is fixed to the main body, and the second branch carries the tongue and is adapted to be moved towards the first leg by elastic deformation of the handle.

Preferably, the locking device comprises a wedge adapted to be mounted between the branches of the handle to prevent the elastic deformation of the handle and in that each leg of the handle and the wedge each comprise a hole adapted to be traversed by a rod such as the handle of a padlock.

BRIEF DESCRIPTION OF THE DRAWINGS Other features and advantages of the invention will appear on reading the detailed description which follows for the understanding of which reference will be made to the appended figures in which:

Figure 1 is a schematic perspective view of a controller of a disconnector on which the locking device according to the invention is intended to be mounted;

FIG. 2 is a view similar to that of FIG. 1, showing the locking device before it is mounted on the control device;

FIG. 3 is a view similar to that of FIG. 2, in which the locking device is mounted on the control device; Figure 4 is a perspective representation of the locking device shown in Figures 2 and 3, in which a shim and a locking lock of the handle are shown.

DETAILED PRESENTATION OF PARTICULAR EMBODIMENTS

For the description of the invention, the vertical, longitudinal and transverse orientations according to the reference V, L, T indicated in the figures will be adopted without limitation.

FIG. 1 shows a part of a control device 10 of electrical equipment such as a high or very high voltage current line disconnector.

The control device 10 comprises a support plate 12 which here consists of a pair of parallel plates 14 spaced transversely from one another.

Each plate comprises in particular two blades 15s, 15i of longitudinal main orientation, which are offset vertically.

A magnetic core 18 is mounted between the two plates 14.

The magnetic core 18 is made in two parts, a first part 24 is fixed to the support plate 12 by clamping between the two plates 14 by means of two bolts 20, 22, the other part 26 is fixed to the plate support 12 removably.

The connection of the removable part 26 to the support plate 12 is formed on the one hand by means of two pins 28 arranged with each side of the removable portion 26, each of which is adapted to be received in a longitudinal groove 30 formed in the free longitudinal end of the lower blade 15i. These pins 28 make it possible to vertically position the removable part 26 with respect to the support plate 12.

The connection of the removable part 26 is also achieved by a spring blade 32 providing a maintenance of the removable part 26, bearing longitudinally against the fixed part 24.

The leaf spring 32 is fixed to the support plate 12, it is received in vertical grooves 33 open upwards, which are formed in the free longitudinal ends of the upper blades 15s and lower blades 15i.

The control device also comprises an annular winding 34, part of which is introduced into the core 18 between the upper blades 15s and the lower blades 15i and the winding is arranged around the lower blades 15i.

The control device also comprises a ratchet 36 which is pivotally mounted relative to the support plate 12 about a transverse axis A formed at a bolt 22.

The ratchet 36 is connected to the live parts of the disconnector via a not shown connecting arm.

The ratchet 36 is mounted on the plate outside the plates 14, that is to say that it is shifted transversely with respect to the magnetic core The ratchet 36 is movable relative to the support plate 12 between a rest position shown in the figures, and an actuating position. The position of rest of the ratchet corresponds to an open state of the disconnector, that is to say a state of the disconnector for which there is no current flow through the disconnector. The actuating position of the ratchet corresponds to a closed state of the disconnector, that is to say a state of the disconnector for which an electric current flows through the disconnector.

The ratchet 36 is biased towards the rest position by means of a return spring 38.

The control device 10 also includes a locking device of the ratchet 36 in its rest position, preventing an error closing of the disconnector.

The locking device comprises an armature 40 arranged between the lower blades 15i, which carries a pin 42 protruding transversely with respect to the support plate 12, on the same side as the ratchet 36.

The armature 40 is able to move between a rest position in which the pin 42 cooperates with a portion of the ratchet 36 to prevent the ratchet 36 from moving towards its actuating position, and an unengaged position in which the pin 42 does not move. can not prevent the ratchet 36 from moving to its actuating position. The displacement of the armature 40 between its rest position and its released position consists of a pivoting around a second transverse axis B.

A spring 44 resets the armature 40 and the pin 42 to their rest position. Means not shown cause the armature 40 to its unobstructed position.

Thus, when the drive means of the armature 40 are not actuated, the armature 40 and the pin 42 are automatically driven by the spring 42 to the rest position of the armature 40, thus preventing the movement of the ratchet 36 to its actuating position.

When an operation of maintenance of the disconnector must be implemented, the movement of the live parts of the disconnector must be prevented, to protect the operator intervening on

1 apparatus.

This securing of the intervention is effected by locking the control device 10 of the disconnector.

On the one hand, the control device 10 is deactivated by the disassembly of the magnetic core 18, that is to say by dismounting the mobile part 26 of the core 18.

Also, the control device 10 is mechanically locked in its rest position, to prevent the ratchet 36 from moving to its active position.

The mechanical blocking of the control device 10 is achieved by means of a locking device 50 shown in Figures 2 and following.

The locking device 50 consists of a removable element which is adapted to be mounted on the control device 10 at the beginning of an operator intervention, to lock it in the rest position of the ratchet 36.

The locking device 50 cooperates with the ratchet 36 to prevent any pivoting of the ratchet 36 towards its actuated position. The locking device 50 also cooperates with the locking device to hold it in its rest position

The locking device 50 comprises a body 52 which is adapted with the armature 40 to maintain it in its rest position.

The body 52 has a bearing face 54 which is of complementary shape to the shape of a face opposite the armature 40. Thus, when the body 52 is in contact with the armature 40, the complementary shape between the bearing face 54 and the face opposite the armature prevents rotation of the armature 40 about its transverse pivot axis B.

The body 52 also includes a finger 56 which is offset transversely relative to the body 52, which extends mainly longitudinally and a free end 56a is adapted to come into contact with the ratchet 36 to prevent the movement of the ratchet 36 to its position actuation. As can be seen in FIG. 3, when the locking device 50 is connected to the control device 10, the support face 52 of the body 52 and the free end 56a of the finger 56 are respectively in abutment against the armature 40 and the ratchet 36, thus blocking these components 40, 36 moving relative to the support plate 12. The control device 10 is thus mechanically locked in position.

Assembly of the locking device

50 with the control device 10 is achieved by the insertion of the body 52 on the support plate 12, between the parallel plates 14.

The transverse width of the body 52 is thus substantially equal to the transverse distance between the two parallel plates 14, thus achieving the transverse positioning of the body 52 with respect to the support plate 12.

Also, the body 52 has two shoulders 58 projecting transversely, which are distributed on either side of the body 52.

Each of these shoulders 58 is adapted to be received between the blades 15s, 15i of a plate 14, its vertical dimension is substantially equal to the vertical distance between the two blades 15s, 15i of the plate 14, thus achieving the vertical positioning of the body 52 relative to the support plate 12. Also, each shoulder 58 is elongated longitudinally, preventing any pivoting of the body 52 relative to the support plate 12 in a vertical longitudinal plane. The locking device 50 also comprises a handle 60 which is fixed to the body, which allows the handling of the locking device 50 and which also realizes the longitudinal positioning of the locking device 50 with respect to the support plate 12.

The handle 60 consists of a U-shaped folded metal blade having two parallel branches 62, 64 of longitudinal main orientation which are offset vertically with respect to one another, a first branch 62 of which is fixed to the body 52 , and whose second lower leg 64 is adapted to cooperate with the support plate 12 for positioning and maintaining the position of the body 52 longitudinally relative to the plate.

The handle 60 is located longitudinally relative to the body 52 on the opposite side to the bearing face 54 and the free end of the finger 56. Here, the handle is located on the left side of the body 52.

The first branch 62 thus extends longitudinally away from the plate 52 from a first end 62a at which the first leg 62 is fixed to the body 52.

The first branch 62 and the second branch 64 are interconnected by a bent portion 66 located at their farthest ends of the body 52, that is to say here their left ends.

The free end 64a of the second leg 64, which is the closest to the body 52, is folded downwardly forming a tongue 68 generally vertical transverse.

The tongue 68 is adapted to be received in the vertical groove 33 made in each of the lower blades 15i, when the locking device 50 is mounted on the control device 10.

In this position, the tongue 68 makes it possible to lock the locking device 50 in translation longitudinally with respect to the support plate 12.

The grooves 33 are open vertically upwards. Thus, the tongue 68 is introduced into the grooves 33 or is removed from the grooves 33 by a vertical movement downwards for its introduction, or by a vertical upward movement for its extraction.

The insertion and removal of the tongue 68 in / out of the grooves 33 is effected by the elastic deformation of the handle 60, bringing the branches 62, 64 towards one another. During this deformation of the handle 60, only the free end of the lower branch 64, which carries the tongue 68 moves upwards.

When the deformation of the handle 60 is sufficiently large, the tongue 68 can not bear longitudinally against the free end of each lower blade 15i, thus making it possible for the body 52 to move relative to the support plate 12. When the deformation force of the handle 60 is released, the elasticity of the handle recalls resiliently the tab 68 downward, to fit into the grooves 33 where appropriate.

The handle 60 is made from a metal blade, for example a spring steel, whose thickness is defined so that the elastic deformation of the handle 60 can be performed manually by an operator.

By way of nonlimiting example, the longitudinal length of each leg of the handle 60 is about 100 millimeters, the handle 60 is made of a spring steel 1 millimeter thick.

Thanks to the handle 60 and the tongue 68 received in the grooves 33 of the lower blades 15i, the body 52 of the locking means 50 is held in a position relative to the support plate 12 in which it is simultaneously resting against the ratchet 36 and the frame 40, thus preventing any movement of the ratchet 36 towards its actuating position.

When the locking device 50 is mounted on the control device 10, during a human intervention on the disconnector, it is preferable to prevent the locking device 50 from being disassembled by a person other than the operator.

For this, as can be seen in Figure 4, the locking device 50 is adapted to be immobilized by means of a shim 70 inserted between the branches 62, 64 of the handle 60, to prevent their approximation.

Thus, when the shim 70 is present, the tongue 68 can not be moved upwards, it can not be removed from the grooves 33 of the lower blades 15i.

The shim 70 comprises a central portion 72 which is received between the arms 62, 64 of the handle 60 and two wings 74 distributed on either side of the arms 62, 64 of the handle 60, which make it possible to prevent the exit of hold 70 out of the handle.

The central portion 72 of the shim 70 further comprises a vertical hole (not shown) which is aligned with holes 76 made in the branches 62, 64 of the handle 60 when the shim is in position, these holes 76 are capable of being crossed by the handle 78 of a padlock 80.

As can be seen in Figure 4, the handle 60 has two pairs of holes 76, a first pair of holes 76 is located at the free end of the lower leg 64 of the handle 60, and is associated with the shim 70 and padlock 80 when it is desired that the shim 70 prevents the movement of the tongue 68.

A second pair of holes 76 is located at the bent portion 66, it is associated with the shim 70 and the padlock 80 when it is desired to be able to move the tongue 68, in order to set up the locking device 50 or the remove from the control device 10.

The locking device 50 forms an apparatus which is adapted to be mounted on the control device 10 only when the control device 10 is to be locked. Since the period of time between two successive maintenance interventions on electrical equipment such as a disconnector, on which the control device 10 is installed, is of the order of ten years, the locking device is very rarely used on the disconnector.

Thus, since the locking device 50 which has just been described is able to be removed from the disconnector when not in use, the same locking device 50 can be used for the maintenance of multiple disconnectors.

The design of the locking device 50 is further defined according to the control device on which it is to be mounted. This design can also be defined for a control device that was not originally designed to receive such a locking device 50.

Claims

1. A device (50) for locking a control device (10) of medium or high voltage electrical equipment, the control device (10) comprising a support plate (12), a ratchet (36) which is pivotally mounted relative to the support plate (12) about a first axis between a rest position and an operating position of the apparatus, and a locking device (40, 42) of the ratchet (36). in its rest position, the locking device (40, 42) being movable relative to the support plate (12) between an active locking position of the ratchet (36) and an inactive position allowing the ratchet (36) to pivot relative to the support plate (12),

characterized in that the locking device (50) is adapted to be mounted on the apparatus removably and is adapted to lock the ratchet (36) in its rest position and to lock the locking device (40, 42). in its locking position of the ratchet (36) when mounted on the apparatus.

2. Locking device (50) according to claim 1, characterized in that it comprises a main body (52) which is adapted to come into contact simultaneously with the ratchet (36) and the locking device (40, 42). for their simultaneous locking, and a handle (60) comprising means for securing the locking device (50) on the apparatus.

3. Locking device (50) according to claim 2, characterized in that the body (52) comprises a bearing face (54) which is adapted to come into contact with a component (40) of the locking device

(40, 42) for locking the locking device

(40, 42).

4. Locking device (50) according to claim 2 or 3, characterized in that the body (52) comprises means (58) for its positioning transversely and vertically relative to the support plate (12) and in that the handle (60) has means (68) for positioning and holding the body (52) in position longitudinally with respect to the support plate (12).

5. Locking device (50) according to any one of claims 2 to 4, characterized in that the handle (60) comprises a tongue (68) which is adapted to engage in at least one complementary groove (33) of the support plate (12).

6. Locking device (50) according to claim 5, characterized in that the handle (60) is able to deform elastically under manual action to allow the release of the tongue (68) out of the groove (33).

7. Locking device (50) according to claim 6, characterized in that the handle (60) consists of a U-shaped folded metal blade whose first leg (62) is fixed to the main body (52), and the second leg (64) carries the tongue (68) and is adapted to be brought closer to the first leg (62) by elastic deformation of the handle (60).

8. Locking device (50) according to claim 7, characterized in that it comprises a shim (70) adapted to be mounted between the arms of the handle (60) to prevent the elastic deformation of the handle (60) and in that each leg (62, 64) of the handle (60) and the wedge each comprise a hole (76) adapted to be traversed by a rod such as the handle (78) of a padlock (80).