High Voltage Disconnection Telescopic Switches Isolated by Air for Isolated-Phase Bus

Abstract

This invention relates to a telescopic switch for isolated-phase bus duct, comprising: a first male conductor including a first guide-positioner means (4); a 5 second female lead connector coaxially separated from the first connector which includes a second guide-positioning means, wherein said moving contact is coupled coaxially and in a movable manner to the first conductor, and wherein said moving contact moves to an open position, wherein said moving contact is separated from the first conductor and to a closed position where said moving contact causes a contact between the first male connector and that of a second female connector, through interaction with one another from the first guide-positioner means of the first conductor, the second guide-positioner means of the second conductor and the guiding means of the moving contact.

Claims

1. A telescopic switch for isolated-phase bus duct, comprising: a first male lead connector (1) comprising an aluminum base (1a) and a first-guide positioning means (4); a second female lead connector (2) coaxially separated from the first connector (1), said second female lead connector (2) including an aluminum base (2a) and a second guide-positioning means (5); supporting guiding means (32, 33) that comprises a front support guide (32) and a back support guide (33), a moving contactor (3) which comprises the back guiding support (32) and a plurality of contact plates (33) coupled to the peripheral edges of each front guiding support (32) and the back guiding support (33), wherein said moving contact (3) is coupled coaxially and in a movable manner to the first male conductor (1); and wherein said moving contact (3) moves to an open position so that the moving contact (3) is separated from the first conductor (1) and to a closed position where said moving contact (3) causes contact between the first male connector (1) and that of a second female connector (2), through interaction with one another from the first guide-positioner means (4) of the first conductor (1), the second guide-positioner means (5) of the second conductor (2) and contact plates (31) coupled to the guiding means (32, 33) of the moving contact (3).

2. A telescopic switch for duct of isolated-phase bus, in accordance with claim 1, comprising two moving contact interfaces such as a back section (31a) of said contact plate (31) and a front section (31b), as well as two fixed contact interfaces such as contact fingers (1b, 2b) of reduced aluminum section, which are coupled to each aluminum base (1a, 2a) of the first male lead connector (1) and the second female lead conductor (2).

3. A telescopic switch for duct of isolated-phase bus, in accordance with claim 1, characterized in that the contact fingers and the contact plates (31) are coated with a silver coating.

4. A telescopic switch for duct of isolated-phase bus, in accordance with claim 1, characterized in that the contact force is obtained only from the elastic deformation of the fingers of reduced aluminum section.

5. A telescopic switch for duct of isolated-phase bus, in accordance with claim 1, characterized in that the contact plates (31) have flat contact surfaces.

6. A telescopic switch for duct of isolated-phase bus, in accordance with claim 2, characterized in that the contact fingers (1b, 2b) are identical for both the first male lead connector (1) as well as for the second female lead connector (2).

7. A telescopic switch for duct of isolated-phase bus, in accordance with claim 2, characterized in that the back section (31a) of said contact plate (31) is higher than the front section (31b), and is in contact with the fingers (1b) installed on the male lead connector (1) at the end of the displacement.

8. A telescopic switch for duct of isolated-phase bus, in accordance with claim 1, characterized in that in the configuration of the contact fingers (1b, 2b), an increase in the number of individual contact fingers are allowed, reducing the width of the independent section of each finger.

9. A telescopic switch for duct of isolated-phase bus, in accordance with claim 1, characterized in that the moving contacts (3) are produced from aluminum or copper alloys.

10. A telescopic switch for duct of isolated-phase bus, in accordance with claim 2, characterized in that the contact fingers are produced from copper alloys.

11. A telescopic switch for duct of isolated-phase bus, in accordance with claim 1, characterized in that opposite contact plates (31) form a pair of plates and their function is to physically interact with the contact fingers at the same time, whereas the length of other pairs of contact plates have different lengths to avoid the maximum mechanical load at the start of the connection.

12. A telescopic switch for duct of isolated-phase bus, in accordance with claim 1, characterized in that the back support (33) has at least two sliding hubs/bearings (35) that moves on the guides of the first guide-positioner system (4) of the male lead connector (1).

13. A telescopic switch for duct of isolated-phase bus, in accordance with claim 1, characterized in that said switch is manufactured in a modular fashion.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0037] FIG. 1a, is a cross-sectional view of the telescopic switch from this invention in its closed position.

[0038] FIG. 1b, is a cross-sectional view of the telescopic switch from this invention in its opened position.

[0039] FIG. 1c, is a perspective view of the telescopic switch from this invention in its closed position.

[0040] FIG. 1d, is a perspective view of the telescopic switch from this invention in its opened position.

[0041] FIG. 2, is a perspective view of the second lead connector of female configuration.

[0042] FIG. 3, is a perspective view of the second lead connector in female configuration exemplifying the 15 guide-positioning means.

[0043] FIG. 4, is a perspective view of the first lead connector of male configuration.

[0044] FIG. 5, is a perspective view of the first lead connector in female configuration exemplifying the guide-positioning means.

[0045] FIG. 6, is a perspective view of the moving contact.

[0046] FIG. 7, is a perspective view of the support of the moving contact.

[0047] FIG. 8, is a perspective view of the contact plate.

[0048] FIG. 9a, is a perspective view of the first lead connector in female configuration exemplifying the internal components.

[0049] FIG. 9b, is a perspective view of the first lead connector in female configuration exemplifying the external components.

[0050] FIG. 9c, is a perspective view of the mechanical system from this invention.

DETAILED DESCRIPTION OF THE INVENTION

[0051] In accordance with to the FIGS. 1-9c shown, this invention relates to construction of disconnection telescopic switches, to their maintenance and integration into the isolated-phase bus. The moving contact systems of this invention are designed to provide a distribution device with a smaller number of contact interfaces, low resistance and precise calculated operating force. The moving contact (3) of this invention is designed to be a polygonal modular construction with independent contact plates.

[0052] This invention is conducted to provide a disconnection telescopic switch with flat sliding contact between contact fingers (1b, 2b) and a moving contact (3).

[0053] With this invention, it is intended that all of the contact assembly elements be manufactured by machining, xtrusion and/or stamping and to supply a constructive assemblage solderless.

[0054] The disconnection telescopic switch of the invention consists of a first lead conductor (1) having a male polygonal configuration, a second lead conductor (2) having a female polygonal configuration, a moving modular contact (3) and a mechanical system, as illustrated in FIGS. 1a-1d.

[0055] The first male lead connector (1) consists of an aluminum base (1a), with fingers (1b) of reduced aluminum section and a first guide-positioning system (4). The aluminum base (1a) has a polygonal tubular body with an internal intermediate section (20), having said inner intermediate (20) a first bearing central bore (21), and at least two coupling bores (20a) as is illustrated in FIG. 4. Fingers (1b) of reduced multiple and/or single aluminum section are screwed on a flat surface of a front area (1f) of the aluminum base (1a); in addition, one of the flat surfaces of the aluminum base (1a) comprises a second bearing central bore (22). Those with finger (1b) aluminum reduced section are formed of an elongated rectangular configuration having a first end in one piece, of which a plurality of contact fingers (1b) emerge, said first end of one piece having a 5 plurality of passed coupling bores which couple through screw to a flat surface of a front area (1f) of the aluminum base (1a).

[0056] The first guide-positioning system (4) is constructed of at least two guides which support the moving contact (3) during the sliding, wherein said first guide-positioning system (4) is installed in an intermediate section (20) of the aluminum base (1a), being coupled to the coupling bores (20a) of the intermediate section (20), as illustrated in FIG. 5. The intermediate section (20) of the aluminum base (1a) is in one piece, which provides structural rigidity.

[0057] The second lead conductor (2) such as a female lead conductor (2) consists of an aluminum base (2a) with fingers (2b) of small aluminum section and a second guide-positioning system (5).

[0058] The aluminum base (2a) has a polygonal tubular body (11) with an internal intermediate section (10), as illustrated in FIG. 2. The fingers (2b) of multiple and/or single aluminum reduced section are screwed to a flat surface of a front area (2f) of the aluminum base (2a), such fingers (1b) of aluminum reduced section are formed of an elongated rectangular configuration having a first end in one piece, of which a plurality of contact fingers (2b) emerge, said first end of one piece having a plurality of passed coupling bores which couple through screw to a flat surface of a front area (2f) of the aluminum base (2a).

[0059] The contact fingers (1b, 2b) are identical for both the first male lead conductor (1) and the second female lead connector (2); and further, an increase in the number of individual contact fingers is allowed, reducing the width of the separate section of each finger. Another essential feature is that convection cooling of the moving contact (3) and of the contact fingers is provided by the circulation of air through the spaces between contact fingers and contact plates.

[0060] The second guide-positioner (5) system is constructed of at least two guides that limit the movement of the moving contact (3) and the position of the same movable contact (3) in the center of the female lead connector (2). The second guide-positioner (5) system is installed in the intermediate section (10) of the aluminum base (2a), as illustrated in FIG. 3, and further it configures a limiter system of displacement consisting of stainless steel shafts and inserted in bronze, positioned in an orbital manner within the male and female lead connectors.

[0061] The moving modular contactor (3) comprises contact plates (31) and guiding support means (32, 33), wherein said moving contact (3) is coupled coaxially and in a movable manner to the first conductor (1); and wherein said moving contact (3) moves to an open position so that the moving contact (3) is separated from the first conductor (1) and to a closed position where said moving contact (3) causes contact between the first male connector (1) and that of a second female connector (2), through interaction with one another from the first guide-positioner means (4) of the first conductor (1), the second guide-positioner means (5) of the second conductor (2) and the guiding means (32, 33) of the moving contact (3).

[0062] The means of guiding support (32, 33) of the moving modular contactor (3) comprise a front guiding support (32) and a back guiding support (33), as illustrated in FIGS. 6 and 7.

[0063] The front guiding supports (32) and back guiding (33) are polygonal and have a matching number of sides for male (1) and female (2) lead connectors. The front guiding support (32) has hubs (32a) designed to interact with the guide-positioning system (4) of the female lead connector (2) to place the moving connector (3) and to limit its displacement.

[0064] The back support (33) has at least two sliding hubs/bearings (35) sliding on the guides of the first guide-positioner system (4) of the male lead connector (1). The telescopic switch of this, further includes a ball screw nut (36) installed in the center of that back support (33), as illustrated in FIG. 7. The front guiding support (32) and the back guiding (33) have coupling peripheral edges (32a), which have bores to couple contact plates in a screwed manner (31).

[0065] Contact plates (31), in their preferred modality, have an elongated rectangular configuration so that two different levels in height in each of its ends are formed, thus forming a back section (31a) and a front section (31b); the back section (31a) of said contact plate (31) is higher and is contacted with the fingers (1b) installed on the male connector (1) at the end of the displacement, i.e. when this is in its closed position.

[0066] The front section (31b) of said contact plate (31) is lower in height as compared with the back section (31a), and its function is to contact the fingers (2b) of the female connector (2) when this is in a closed position, as illustrated in FIG. 8.

[0067] Opposite contact plates (31) form a pair of plates and their function is to physically interact with the contact fingers (2b) at the same time, whereas the length of other pairs of contact plates have different lengths to avoid the maximum mechanical load at the start of the connection. Contact fingers and contact plates (31) will be coated with a silver coating.

[0068] In order to perform the movement of the modular moving contact (3) from a closed position to a opened position, the telescopic switch of this invention includes a mechanical system (40) placed within the aluminum base (1a) of the first male deal connector (1) and coupled with and coupled to the internal intermediate section (20) from the aforementioned first male lead connector (1). The mechanical system (40) consists of a ball screw (41) consisting of a first end placed in a ball bearing (42a) mounted over the first bearing central bore (21) of the internal intermediate section (20); the ball screw (41) has such a length that it can take and move itself coaxially to the moving modular contact (3). The ending of the ball screw end (41) includes a first bevel gear (43) which mechanically attaches itself to a second bevel gear (44). A main axis (45) mounted on bearings (42b, 42c) in the second central bearing bore (22) of the aluminum base (1a) of the first male connector (1) is the one that transmits movement to the first bevel gear (43) of the spherical screw (41) through a second bevel gear (44). The rotation of the main shaft (45) 10 rotates the ball bearing (42a) and, therefore, displaces the moving connector (3), as illustrated in FIGS. 9a-9c.

[0069] The distance between the finger contact surfaces (2b) of the female lead connector (2) is smaller than the distance between contact plates (31) of the front area of the moving contact (3); the movement of the moving contact (3) will move the finger contact (2b) to the predicted distance and an elastic deformation of aluminum will provide a disconnection telescopic switch with the necessary contact force. The same thing applies to the finger of back contact (1b) of the male lead connector (1) in the movement end, the largest selection of the contact plates (31) will displace the contact fingers (1b) and the electrical contact will be set.