FR3084783A1 - ASSEMBLY COMPRISING A PLATE AND A CALIBER SELECTOR WITH INTEGRATED SHORT-CIRCUIT DEVICE - Google Patents

Abstract

The invention relates to an assembly (200) for selecting a rating for an electrical installation and comprising a plate (202) comprising, for each rating and each phase conductor, a phase connector (212) connected to a conductor of '' a winding, for each wound core, a neutral connector (208) for a common conductor of the wound core, a comb (402) connected to each of the neutral connectors (208) and comprising for each phase connector (212), an elastic blade (412) taking a short-circuit position or an out-of-short-circuit position, and for each gauge, a window (230) where the elastic blades (412) corresponding to the gauge are across the window (230) , and a selector (204) comprising, for each phase conductor, a phase measurement connector connected to a downstream phase conductor (160) supplying an electric meter, a neutral measurement connector (507) connected to the downstream conductor ( 160) from neutral al imenting the electric meter, and a tongue (508) constraining each elastic blade (412) in the off-short-circuit position.

Description

ASSEMBLY COMPRISING A PLATE AND A CALIBER SELECTOR WITH INTEGRATED SHORT-CIRCUIT DEVICE

TECHNICAL AREA

The present invention relates to an assembly comprising a plate and a gauge selector in the context of an electrical installation.

STATE OF THE PRIOR ART

In the case of high power electrical installations (36 kVA to 250 kVA), it is necessary to transform and reduce the intensities of the primary circuit in order to be able to transmit them to the metering system via a secondary circuit of lower intensity. Wire-wound, multi-gauge (generally 3) type measurement sensors are placed on each phase conductor to measure the intensity of the current flowing through the electrical installation.

Fig. 1 shows an electrical diagram of an electrical installation 100 comprising three conductors 101, 102, 103 constituting the three phases and a neutral conductor 104. This method of connection is representative of the EDF® specification referenced HN 42-S-57.

For each phase conductor 101, 102, 103, the electrical installation 100 comprises a wound toroid and to have sufficient measurement accuracy on a scale of 0A to 500A, it is known to use three windings 101a-c, 102a- c, 103a-c connected in series by a wound toroid. In Fig. 1, the windings 101a, 102a and 103a are associated with the first rating 0A to 100A, the windings 101b, 102b and 103b are associated with the second rating 100A to 200A and the windings 101c, 102c and 103c are associated with the third rating 200A to 500A.

The windings are electrically connected to a plate 150 which for this purpose has connectors for receiving the various conductors connected to the windings. Thus, for the wound toroid corresponding to the phase conductor 101, the winding 101a is connected to a connector 151 of the plate 150 by a first conductor 161 and to a so-called neutral connector 154 of the plate 150 by a common conductor 164 forming the windings neutral point. In the same way, the coil 101b is connected to a connector 171 of the plate 150 by a second conductor 162 and to the neutral connector 154 of the plate 150 by the common conductor 164. In the same way, the coil 101c is connected to a connector 181 of the plate 150 by a third conductor 163 and to the neutral connector 154 of the plate 150 by the common conductor 164.

From this plate 150, downstream conductors 160 will supply the electric meter.

Depending on the size chosen, a selector will allow the windings corresponding to the size chosen to be electrically connected with the downstream conductors 160. Thus, if the first size is chosen, the selector will connect the windings 101a, 102a and 103a to the counter through the connectors 151, 152 and 153, and the so-called neutral connector 154 while the other phase connectors are disconnected.

When the gauge must be transferred to another measuring range, the selector must be moved to change the active connectors.

To intervene safely, it is necessary before modifying the selected current range, that is to say the rating, that all the coils of the secondary circuits are short-circuited. At this point only, the operator can select the new intensity rating and then put the electrical installation back into service by eliminating the short-circuiting of the selected rating (or all the ratings simultaneously).

The plates with gauge selector which are currently used are complex to realize and to use and it is necessary to find a plate with a gauge selector which is simpler in design.

STATEMENT OF THE INVENTION

An object of the present invention is to provide an assembly comprising a plate and a caliber selector which comprises an integrated short-circuiting device.

To this end, an assembly is proposed for selecting a rating from among several for an electrical installation comprising at least one phase conductor and one neutral conductor, where each phase conductor is threaded into a wound toroid comprising a plurality of windings , said assembly comprising:

- a plate comprising:

- for each rating and each phase conductor, a phase connector, intended to be electrically connected to a conductor from one of the windings corresponding to said rating and to said phase conductor,

- for each wound toroid, a neutral connector intended to receive a common conductor that comprises said wound toroid,

- an electrically conductive comb and electrically connected to each of the neutral connectors, said comb comprising for each phase connector, an elastic blade which can alternately take a short circuit position in which said elastic blade is in contact with said phase connector and a position except short-circuit in which said elastic strip is not in contact with said phase connector, and where each elastic strip is constrained in short-circuit position, and

- for each size, a window where the elastic blades corresponding to said size are across the window, and

- a selector which includes:

- for each phase conductor, a phase measurement connector intended to be electrically connected to a downstream phase conductor supplying an electric meter,

a neutral measurement connector intended to be electrically connected to a downstream neutral conductor supplying the electric meter, and

- a tongue intended to constrain each elastic blade in the off-short-circuit position, and where when the selector is placed on the plate for a rating, each phase measurement connector of a phase comes into electrical contact with the connector of corresponding phase, the neutral measurement connector comes into electrical contact with the neutral connector, the tab is inserted in the window corresponding to the rating, and where the contacts between the selector measurement connectors and the circuit board connectors are made before contact between the tongue and the elastic blades corresponding to the size.

According to a particular embodiment, the elastic blades are in abutment against the ends of the phase connectors and the tongue pushes the ends of the elastic blades in a generally axial direction relative to the phase connectors.

According to another particular embodiment, the elastic blades are supported laterally against the phase connectors and the tongue comprises, for each phase connector, a stud which pushes the elastic blade corresponding to said phase connector in a generally radial direction relative to to the phase connectors.

Advantageously, each stud has an inclined plane.

Advantageously, the selector comprises a housing and a sole mounted movable in rotation on the housing at an open end around an axis of rotation Z, the sole carries the measurement connectors and the tongue, the plate comprises two pins arranged opposite one another, and on either side of the connectors of the plate, each lug has a tooth oriented towards the tooth of the other lug, for each lug, the sole has a notch in which positions the lug, and for each tooth, the housing has a shoulder and an L-shaped channel, a first branch of which is behind the shoulder and a second branch of which is open towards the plate.

Advantageously, the sole has two diametrically opposite arches crossed by an oblong hole, and the housing has, for each arch, a stud which is positioned in the oblong hole of the arch.

BRIEF DESCRIPTION OF THE DRAWINGS

The characteristics of the invention mentioned above, as well as others, will appear more clearly on reading the following description of an exemplary embodiment, said description being made in relation to the accompanying drawings, among which:

the Eig. 1 is a connection diagram of a circuit board with a caliber selector, the Eig. 2 is a perspective front view of an assembly according to a first embodiment of the invention and comprising a plate and a caliber selector, the Eig. 3 is a perspective view from the back of the plate of the Eig. 2, Eig. 4 is a perspective view from the back of the plate of the Eig. 2 with the short-circuiting device, the Eig. 5 is a perspective view in section of a caliber selector according to the first embodiment of the invention, the Eig. 6 is an exploded view of the caliber selector of the Eig. 5, the Eigs. 7 to 9 show different stages of fitting the caliber selector on the plate which are seen in section, FIG. 10 is a perspective view from the back of the plate with the short-circuiting device for a second embodiment of the invention, and FIG. 11 is a perspective view of a caliber selector according to the second embodiment of the invention.

DETAILED DESCRIPTION OF EMBODIMENTS

Fig. 2 shows an assembly 200 according to a first embodiment of the invention which comprises a plate 202 and a selector 204 which is removably fixed on the plate 202. The plate 202 has three positions corresponding to three different ratings, here 100A, 200A and 500A. The distribution and number of sizes can be changed. The plate 200 is made of an electrically insulating material.

The assembly 200 allows the selection of a rating among several (here three) for an electrical installation, which here in particular comprises three conductors 101, 102, 103 of phase and a neutral conductor 104 with a toroid wound by conductor phase, where each wound toroid has three coils as shown in FIG. 1.

Generally speaking, the electrical installation comprises at least one phase conductor and one neutral conductor, where each phase conductor (the primary circuit) is passed through a wound toroid comprising a plurality of windings (the secondary circuits).

The invention is more particularly described for one of the calibers, here the 100A, but it applies in the same way to the other calibers.

For each rating and each phase conductor, the plate 202 includes an electrical connector 211, 212, 213 called "phase". For each wound toroid, the plate 202 has an electrical connector called neutral 208.

Fig. 3 shows the plate 202 seen from behind. At the rear of the plate 202, each phase connector 211, 212, 213 is electrically connected to the conductor from the winding corresponding to the rating and to the phase conductor. Thus, in the embodiment of the invention presented here, the phase connector 211 corresponds to the connector 151, the phase connector 212 corresponds to the connector 152 and the phase connector 213 corresponds to the connector 153.

Thus from the phase connector 211, a conductor 221 joins the winding 101a, from the phase connector 212, a conductor 222 joins the winding 102a, and from the phase connector 213, a conductor 223 joins the winding

103 a. The fixing of each conductor 221, 222, 223 on the corresponding phase connector 211, 212, 213 is ensured for example by a screw system.

For each rating, the layout is similar in order to connect the windings associated with said rating to the corresponding connectors.

Fig. 4 shows the assembly 200 with a short-circuiting device which takes the form of a comb 402 made of an electrically conductive material and which is fixed at the rear of the plate 202, here by fixing screws 404. The comb 402 is in electrical contact with each of the electrical neutral connectors 208 which are thus connected together. Each contact is ensured here by a screw 408 which is screwed into the electrical neutral connector 208. Each screw 408 also allows the fixing of the common conductor 406 that each of the wound cores comprises and which corresponds to the common conductor 164. Each neutral connector 208 receives a common conductor 406 from the corresponding wound core. The common conductor 406 forms the neutral point of the windings. Of course, it is possible to have a single neutral electrical connector 208 to which the common conductors 406 of all the wound cores are connected.

The comb 402 is made for example of copper alloy.

For each phase connector 211, 212, 213 of each rating, the comb 402 comprises an elastic blade 411, 412, 413, which can take a short circuit position, in which said elastic blade 411, 412, 413 comes into contact with said phase connector 211, 212, 213. As explained below, said elastic strip 411, 412, 413 can alternately assume a short-circuit position in which said elastic strip 411, 412, 413 is not in contact with said phase connector 211,212,213.

Each elastic strip 411, 412, 413 is constrained in the short-circuit position, that is to say that without external action, the elastic strip 411, 412, 413 is in contact with the phase connector 211, 212, 213 associated. Thus, as explained below, when the selector 204 is not in position, the phase connectors 211, 212 and 213 are in short circuit ensuring the safety of the technician.

Fig. 5 and FIG. 6 show the selector 204 which comprises a housing 502 which is made of an electrically insulating material and which is open at one end. The housing 502 is produced here by assembling two half-shells 602a-b fixed to each other by one or more screws.

The selector 204 also comprises a sole 504 which is mounted on the housing 502 at its open end.

From the selector 204, the electric meter is supplied, for each phase, by a downstream phase conductor 160 and for the neutral by a downstream neutral conductor 160.

For each downstream phase conductor 160, that is to say for each phase, the sole 504 has on one of its faces, an electrical phase measurement connector 506 electrically connected to the downstream phase conductor 160. The sole 504 comprises on the same face, a neutral measurement connector 507 (Fig. 6) electrically connected to the downstream neutral conductor 160. Once assembled, the measurement connectors 506, 507 are housed inside the housing 502.

Each downstream conductor 160 is thus electrically connected to a measurement connector 506, 507 and leaves the selector 204 through a recess 606 that the housing 502 has for this purpose. The fixing of each downstream conductor 160 is ensured for example by a screw system.

The sole 504 also comprises on the other of its faces, a tongue 508 which extends perpendicular to the sole 504 outside the housing 502, that is to say towards the outside of the housing 502 and perpendicular to the plane of the plate 202 against which the selector 204 is fixed. The tongue 508 is made of an electrically insulating material. As explained below, the tongue 508 is intended to constrain the elastic strips 411, 412, 413 in the off-circuit position.

The plate 202 includes, for each caliber, a window 230 which is designed to receive the tongue 508 when the selector 204 is put in place on the plate 202. The window 230 is positioned so that the three elastic blades 411, 412, 413 are arranged in the extension of the window 230 corresponding to said gauge so that the tongue 508 can move these elastic blades by elastic deformation. In other words, the elastic blades 411, 412, 413 are across the window 230 and the tab 508 moves them when it comes out of the window 230.

The Eigs. 7 to 9 show different stages of setting up the selector 204 on the plate 202. The purpose of setting up consists first of all in connecting the measurement connectors 506, 507 of the selector 204 with the connectors 211, 212, 213 , 208 of the plate 202 while the elastic blades 411, 412, 413 of the comb 402 are in contact with the connectors 211, 212, 213, 208 of the plate 202 to produce a short circuit. The installation then consists in separating the elastic blades 411, 412, 413 from the connectors 211, 212, 213, 208 of the plate 202 only after the connection of the measurement connectors 506, 507 of the selector 204 with the connectors 211, 212, 213, 208 of the plate 202 and only for the connectors 211, 212, 213, 208 of the plate 202 corresponding to the rating for which the selector 204 has been put in place.

Conversely, to remove the selector 204, the principle consists in putting the connectors 211, 212, 213, 208 of the plate 202 in short circuit, that is to say in contacting the elastic blades 411, 412, 413 with the connectors 211, 212, 213, 208 of the plate 202, before disconnecting the measurement connectors 506, 507 from the selector 204 and the connectors 211, 212, 213, 208 from the plate 202.

Fig. 7 shows a step during which the selector 204 is approached to the plate 202. The elastic blades 411, 412, 413 are in contact with the connectors 211, 212, 213, 208 of the plate 202 and the measurement connectors 506, 507 of the selector 204 and the connectors 211, 212, 213, 208 of the plate 202 are not connected. Tab 508 enters window 230.

Fig. 8 shows a step during which the selector 204 is closer to the plate 202. The elastic blades 411, 412, 413 are always in contact with the connectors 211, 212, 213, 208 of the plate 202 and the measurement connectors 506, 507 of selector 204 are now in contact with the connectors

211, 212, 213, 208 of the plate 202. The tongue 508 is not in contact with the elastic blades 411, 412, 413.

Fig. 9 shows a final step where the selector 204 is in its final position. The measurement connectors 506, 507 of the selector 204 are always in contact with the connectors 211, 212, 213, 208 of the plate 202. The tongue 508 is in contact with the elastic blades 411, 412, 413 and pushes them so as to the elastic blades 411, 412, 413 are no longer in contact with the connectors 211,

212, 213, 208 of plate 202.

When the selector 204 is removed, the operation is reversed.

Thus, when the selector 204 is placed on the plate 202 for a rating, each measurement connector 506 of a phase comes into electrical contact with the corresponding phase connector 211, 212, 213, the measurement connector 507 of the neutral comes into electrical contact with the neutral connector 208, the tab 508 is inserted into the window 230 corresponding to the rating, and the contacts between the measurement connectors 506, 507 of the selector 204 and the connectors 211, 212, 213, 208 of the plate 202 is made before the contact between the tongue 508 and the elastic blades 411, 412, 413 corresponding to the size.

The lengths of the measurement connectors 506, 507 of the selector 204 and of the connectors 211, 212, 213, 208 of the plate 202 as well as the length of the tab 508 are such that the contacts between the measurement connectors 506, 507 of the selector 204 and the connectors 211, 212, 213, 208 of the plate 202 are made before the contact between the tongue 508 and the elastic blades 411, 412, 413. When the selector 204 is in place, the tongue 508 constrains the elastic blades 411, 412, 413 corresponding to the rating in the short circuit position.

The installation of the selector 204 on the plate 202 at the level of the active caliber makes it possible to visualize the latter clearly and unambiguously.

Each end of the measurement connectors 506, 507 of the selector 204 here takes the form of a point. Each connector 211, 212, 213, 208 of the plate 202 here takes the form of a barrel to receive the tip.

The plate 202 also comprises first locking means, the selector 204 comprises second locking means cooperating with the first locking means to ensure a removable fixing of the selector 204 on the plate 202. A particular embodiment of these locking means is described below.

In the embodiment of the invention presented here, the locking means secure the selector 204 on the plate 202 by a quarter-turn rotation of the housing 502.

In the embodiment of the invention presented here, the sole 504 is mounted so that it can rotate on the housing 502 at its open end around an axis of rotation Z. The axis of rotation Z is then perpendicular to the plane of the plate 202 against which the selector 204 is fixed. The tongue 508 extends parallel to the axis of rotation Z.

To ensure its rotation, the sole 504 has a circular shape and the open end is also circular to ensure cooperation with the sole 504.

In the embodiment of the invention presented in FIG. 6, the sole 504 has two hoops 608 diametrically opposite and crossed by an oblong hole, and the housing 502 has for each hoop 608, a stud 610 which is positioned in the oblong hole of the hoop 608. Thus, when the sole 504 moves in rotation, each hoop 608 moves relative to the associated stud 610 and the rotation is limited by the fact that the studs 610 cannot come out of the oblong holes.

It is possible to provide another embodiment which provides limited rotation of the sole 504 relative to the housing 502. For example, it is possible to provide a circular groove around the open end and a rib around the sole 504 The rib is then inserted into the groove and it is free to move there. The limitation of rotation is obtained for example by stops.

For each rating, the plate 202 comprises two pins 250a-b arranged opposite one another, and on either side of the connectors 211, 212, 213, 208 of the plate 202. The spacing between the lugs 250a-b allows the setting of the selector 204. Each lug 250a-b has a tooth 252a-b oriented towards tooth 252b-a of the other lug 250b-a.

For each lug 250a-b, the sole 504 has a notch 254a-b in which the lug 250a-b is positioned when the selector 204 is approached by the plate 202, thus blocking the rotation of the sole 504.

The housing 502 comprises for each tooth 252a-b, a shoulder 258a-b and a channel 256a-b in L, a first branch of which is behind the shoulder 258a-b relative to the plate 202 and of which a second branch is open towards the plate 202. When the housing 502 is put in place, each tooth 252a-b follows the second branch as long as the housing 502 is approached by the plate 202 by translation parallel to the axis of rotation Z, then follows the first branch when the housing 502 is moved in rotation about the axis of rotation Z. At the end of the rotation, each tooth 252a-b is locked behind the shoulder 258a-b to maintain the housing 502 and therefore the selector 204.

The first locking means are therefore constituted here by the pins 250a-b and the teeth 252a-b. The second locking means are therefore constituted here by the notches 254a-b, the shoulders 258a-b and the channels 256a-b.

In the first embodiment of the invention, the elastic blades 411, 412 and 413 bear against the ends of the phase connectors 211, 212 and 213 and the tongue 508 pushes the ends of the elastic blades 411, 412 and 413 along a generally axial direction relative to the phase connectors 211, 212 and 213.

In the second embodiment of the invention shown in Figs. 10 and 11, the operating principle is identical. Only the positions of the elastic blades with respect to the phase connectors and the shape of the tongue differ from the first embodiment. Each component of the second embodiment has the same reference as the corresponding component of the first embodiment.

In the second embodiment of the invention, the elastic blades 411, 412 and 413 come to bear laterally against the phase connectors 211, 212 and 213 and the tongue 508 pushes the elastic blades 411, 412 and 413 in a generally direction radial with respect to the phase connectors 211, 212 and 213.

To this end, the tongue 508 has at its end, for each phase connector 211, 212, 213 of a caliber, a stud 1002 which has an inclined plane which separates the elastic blade 411, 412, 413 from the phase connector 211 , 212, 213 as it is put in place. In the embodiment of the invention presented in FIG. 11, there are three pins 1002, namely one for each elastic blade 411, 412, 413.

Thus, the tongue 508 comprises, for each phase connector 211, 212, 213, a stud 1002 which pushes the elastic blade 411, 412, 413 corresponding to said phase connector 211, 212, 213 in a generally radial direction relative to the phase connectors 211, 212 and 213.

In the embodiment of the invention presented here, there are three sizes but the invention is applied in the same way for two sizes or more than three sizes.

Claims (6)

1) assembly (200) for the selection of a rating among several for an electrical installation comprising at least one phase conductor and a neutral conductor, where each phase conductor is threaded in a wound toroid comprising a plurality of windings, said set (200) comprising: - a plate (202) comprising: - for each rating and each phase conductor, a phase connector (211, 212, 213), intended to be electrically connected to a conductor from one of the windings corresponding to said rating and to said phase conductor, - for each wound toroid, a neutral connector (208) intended to receive a common conductor (406) that comprises said wound toroid, - an electrically conductive comb (402) and electrically connected to each of the neutral connectors (208), said comb (402) comprising for each phase connector (211, 212, 213), an elastic blade (411, 412, 413) can alternately take a short-circuit position in which said elastic strip (411, 412, 413) is in contact with said phase connector (211, 212, 213) and a non-short-circuit position in which said elastic strip (411 , 412, 413) is not in contact with said phase connector (211, 212, 213), and where each elastic strip (411, 412, 413) is forced into the short-circuit position, and - for each size, a window (230) where the elastic blades (411, 412, 413) corresponding to said size are across the window (230), and - a selector (204) which comprises: - for each phase conductor, a phase measurement connector (506) intended to be electrically connected to a downstream phase conductor (160) supplying an electric meter, a neutral measurement connector (507) intended to be electrically connected to a downstream neutral conductor (160) supplying the electric meter, and - A tongue (508) intended to constrain each elastic blade (411, 412, 413) in the off-short-circuit position, and where when the selector (204) is placed on the plate (202) for a rating, each connector phase measurement (506) of a phase comes into electrical contact with the corresponding phase connector (211, 212, 213), the neutral measurement connector (507) comes into electrical contact with the neutral connector (208) , the tab (508) is inserted in the window (230) corresponding to the rating, and where the contacts between the measurement connectors (506, 507) of the selector (204) and the connectors (211, 212, 213, 208) of the plate (202) are made before the contact between the tongue (508) and the elastic blades (411, 412, 413) corresponding to the size. 2) assembly (200) according to claim 1, characterized in that the elastic blades (411, 412, 413) bear against the ends of the phase connectors (211, 212, 213) and in that the tongue (508 ) pushes the ends of the elastic blades (411, 412, 413) in a generally axial direction relative to the phase connectors (211, 212, 213). 3) assembly (200) according to claim 1, characterized in that the elastic blades (411, 412, 413) are supported laterally against the phase connectors (211, 212, 213) and in that the tongue (508) comprises, for each phase connector (211, 212, 213), a stud (1002) which pushes the elastic blade (411, 412, 413) corresponding to said phase connector (211, 212, 213) in a generally radial direction by compared to phase connectors (211, 212, 213). 4) Assembly (200) according to claim 3, characterized in that each stud (1002) has an inclined plane. 5) assembly (200) according to one of the preceding claims, characterized in that the selector (204) comprises a housing (502) and a sole (504) mounted rotatably mounted on the housing (502) at a open end around an axis of rotation Z, in that the sole (504) carries the measurement connectors and the tongue (508), in that the plate (202) comprises two lugs (250a-b) arranged opposite one from the other, and on either side of the connectors (211, 212, 213, 208) of the plate (202), in that each lug (250a-b) has a tooth (252a-b ) oriented towards the tooth (252b-a) of the other lug (250b-a), in that for each lug (250a-b), the sole (504) has a notch (254a-b) in which is positioned the lug (250a-b), and in that for each tooth (252a-b), the housing (502) has a shoulder (258a-b) and a channel (256a-b) in L whose first branch is behind the shoulder (258a-b) and including a second branch che is open towards the plate (202). 6) assembly (200) according to claim 5, characterized in that the sole (504) has two arches (608) diametrically opposite and crossed by an oblong hole, and in that the housing (502) has for each arch (608 ), a stud (610) which is positioned in the oblong hole of the hoop (608).