SE2251161A1

SE2251161A1 - A breaker switch-disconnector-earthing switch assembly

Info

Publication number: SE2251161A1
Application number: SE2251161A
Authority: SE
Inventors: Boguslaw Wypychewicz
Original assignee: Zpue S A
Priority date: 2021-10-07
Filing date: 2022-10-06
Publication date: 2023-04-08
Also published as: ES1299474Y; DE202022105636U1; BG4419U1; UA153423U; CZ37975U1; FR3128054A3; NL2033248A; PT12181U; SK9890Y1; HU5692U; SE545785C2; FR3128054B3; NL2033248B1; CN219017512U; ES1299474U; FI13358Y1; TR2022015276U5; RO202200034U1; PL130317U1; SK1292022U1

Abstract

The present utility model relates to a breaker switch-disconnector-earthing switch assembly (1) comprising a housing (2) made of dielectric material, in which a disconnector-earthing switch subassembly (3) and a vacuum breaker switch subassembly (4) connected in series with each other are arranged, characterized in thatthe assembly (1) comprises a rotating electrical joint subassembly (5) forming an electrical series connection between the disconnector-earthing switch subassembly (3) and the vacuum breaker switch subassembly (4); andthe disconnector-earthing switch subassembly (3) comprises- a chamber (31) in which a rotatable pin (32) made of dielectric material is arranged, wherein the rotation axis (032) of the rotatable pin (32) coincides with the rotation axis (05) of the rotating electrical joint subassembly (5);- a rotatable conductive connecting element (33) arranged in the chamber (31) and in the rotatable pin (32) and at one end electrically connected by means of the first axial contact (331) to the rotating electrical joint subassembly (5) and at the other end provided with the second radial rotatable contact (332) protruded from the rotatable pin (32) in the direction non-parallel relative to the rotation axis (032) of the rotatable pin (32);- at least two insulating partitions (321) made of dielectric material and protruded from the rotatable pin (32) and surrounding and separating the second radial rotatable contact (332) in the plane (P1-P1) perpendicular relative to the rotation axis (032) of the rotatable pin (32), wherein the insulating partitions (321) define between themselves on the side of the second radial rotatable contact (332) a salient angle (a);- a gear wheel (322) connected to the rotatable pin (32) and rotatable around the axis of rotation (032) of the rotatable pin (32);- a receiving output contact (61) and a earthing contact (62) protruded inward from the internal surface of the chamber (31) in the rotation plane of the second radial rotatable contact (332) of the rotatable conductive connecting element (33) and connectable to the second radial rotatable contact (332) in specific angular positions of this rotatable contact (332);- an electrical receiving output terminal (63) and an electrical earthing terminal (64) connected respectively to the receiving output contact (61) and the earthing contact (62).

Description

A breaker switch-disconnector-earthing switch assembly The present utility model relates to a breaker switch-disconnector-earthing switch assembly comprising a housing made of dielectric material, in which a disconnector- earthing switch subassembly and a vacuum breaker switch subassembly connected in series with each other are arranged.

An integration of a vacuum breaker switch and an disconnector-earthing switch assembly to a form of the above-described breaker switch-disconnector-earthing switch assembly is known from the prior art.

For example the publication WO0133593A1 discloses such a breaker switch- disconnector-earthing switch assembly which comprises a disconnector which is set in an environment protected with SF6 gas and functions as a line/earth changeover switch, and a vacuum breaker switch which is connected in series with the disconnector and which may be used both as a line circuit breaker for protecting the line and as an earthing switch with closing capability.

Obiect of the invention lt has been the object of the present invention to provide an innovative alternative breaker switch-disconnector-earthing switch assembly which has a relatively simple but reliable construction.

Summary of the utilitv model According to the present utility model there is provided a breaker switch- disconnector-earthing switch assembly of the kind mentioned in the outset which comprises a housing made of dielectric material, in which a disconnector-earthing switch subassembly and a vacuum breaker switch subassembly connected in series with each other are arranged, and which is characterised in that the breaker switch-disconnector-earthing switch assembly comprises a rotating electrical joint subassembly forming an electrical series connection between the switch disconnector-earthing switch subassembly and the vacuum breaker subassembly; and _2_ the disconnector-earthing switch subassembly comprises - a chamber in which a rotatable pin made of dielectric material is arranged, wherein the rotation axis of the rotatable pin coincides with the rotation axis of the rotating electrical joint subassembly; - a rotatable conductive connecting element arranged in the chamber and in the rotatable pin and at one end electrically connected by means of the first axial contact to the rotating electrical joint subassembly and at the other end provided with the second radial rotatable contact protruded from the rotatable pin in the direction non- parallel relative to the rotation axis of the rotatable pin; - at least two insulating partitions made of dielectric material and protruded from the rotatable pin and surrounding and separating the second radial rotatable contact in the plane perpendicular relative to the rotation axis of the rotatable pin, wherein the insulating partitions define between themselves on the side of the second radial rotatable contact a salient angle, which preferably is not greater than 110°; - a gear wheel, preferably a worm wheel, connected to the rotatable pin and rotatable around the axis of rotation of the rotatable pin; - a receiving output contact and a earthing contact protruded inward from the internal surface of the chamber in the rotation plane of the second radial rotatable contact of the rotatable conductive connecting element and connectable to the second radial rotatable contact in specific angular positions of this rotatable contact; - an electrical receiving output terminal and an electrical earthing terminal connected respectively to the receiving output contact and the earthing contact.

The dielectric rotatable pin may preferably comprise a radial protrusion protruded from its side surface, from which the second radial rotatable contact is protruded. ln some preferred embodiments of the present utility model, the receiving output contact and/or the earthing contact each may comprise two component contacts, wherein the second radial rotatable contact is inserted between the component contacts in the direction of the rotation axis of the rotatable pin.

The rotating electrical joint subassembly of the breaker switch-disconnector-earthing switch assembly may preferably comprise a conductive intermediary element electrically connected to a stationary contact of the vacuum breaker switch subassembly and comprising an opening located concentrically relative to the _3_ rotation axis of the rotatable pin and provided with a radia| annular recess, wherein in the radia| annular recess a conductive spiral spring is arranged and contacts a surface of the radia| annular recess and contacts the first axial contact of the rotatable conductive connecting element located in the opening of the conductive intermediary element.

According to the present utility model it is preferable that the rotatable pin comprises an insulating collar made of dielectric material and circumferentially surrounding the rotating electrical joint subassembly.

The rotation axis of the rotatable pin of the breaker switch-disconnector-earthing switch assembly preferably coincides with the longitudinal axis of the contacts of the vacuum breaker switch subassembly.

The gear wheel preferably forms a monolithic element together with the rotatable pin and is arranged in the chamber of the disconnector-earthing switch subassembly.

The housing of the breaker switch-disconnector-earthing switch assembly may be preferably provided with a channel in which a driving worm is arranged and coupled with the gear wheel, preferably the worm wheel, of the rotatable pin.

The chamber of the disconnector-earthing switch subassembly is preferably provided with an outlet on the side that is opposite relative to the vacuum breaker switch subassembly, wherein the outlet is preferably closed with a cover, preferably with a rotatable cover.

The housing of the breaker switch-disconnector-earthing switch assembly may preferably comprise a monolithic body made of an electrical insulating resin, preferably made of an epoxy resin, and even more preferably made of a two- component epoxy resin such as for example the commercially available two- component epoxy resin Huntsman CW229-3/HW229-1.

The breaker switch-disconnector-earthing switch assembly according to the utility model has a simple and reliable construction, its use and maintenance are easy, and it does not require an employment of a SFe. insulation. The assemblies of the present utility model may be in a simple manner arranged in a greater number (for example in a number of three assemblies) on a common mounting base thus forming integrated _4_ multi-phase (for example three-phase) breaker switch-disconnector-earthing switch units. Gear wheels of all breaker switch-disconnector-earthing switch assemblies of the present utility model forming such an integrated unit may be driven by means of a single common driving worm. Brief description of drawings The utility model shall be described and explained below in connection with embodiments presented on the attached drawings in which: Fig. 1 shows an axonometric view of the first embodiment of the breaker switch- disconnector-earthing switch assembly of the present utility model, Fig. 2 shows a cross-sectional axonometric view of the first embodiment of Fig. 1 in a position of a connection of a conductive connecting element with an earthing contact, Fig. 3 shows a longitudinal cross-section of the first embodiment of Fig.1 in a position of a connection of a conductive connecting element with an earthing contact, Fig. 4 shows a transverse cross-section of the first embodiment of Fig. 1 made in the plane P1-P1 depicted in Fig. 3 in a position of a connection of a conductive connecting element with an earthing contact, Fig. 5 shows a transverse cross-section of the first embodiment of Fig. 1 made in the plane P2-P2 depicted in Fig. 3 in a position of a connection of a conductive connecting element with an earthing contact, Fig. 6 shows a transverse cross-section of the first embodiment of Fig. 1 made in the plane P2-P2 depicted in Fig. 3 in a neutral position with a complete disconnection of a conductive connecting element, Fig. 7 shows a transverse cross-section of the first embodiment of Fig. 1 made in the plane P2-P2 depicted in Fig. 3 in a position of a connection of a conductive connecting element with a receiving output contact, Fig. 8 shows a longitudinal cross-section of the second embodiment of the breaker switch-disconnector-earthing switch assembly of the present utility model in a position of a connection of a conductive connecting element with an earthing contact, Fig. 9 shows a transverse cross-section of the second embodiment of Fig. 8 made in the plane P1-P1 depicted in Fig. 8 in a position of a connection of a conductive connecting element with an earthing contact, fig. 10 shows show a longitudinal cross-section of the third embodiment of the _5_ breaker switch-disconnector-earthing switch assembly of the present utility model in a position of a connection of a conductive connecting element with an earthing contact.

Detailed description of preferred embodiments The first embodiment of the breaker switch-disconnector-earthing switch assembly of the present utility model as shown in Figs. 1-7 comprises housing 2 made of dielectric material in a form of a monolithic body made of an electrical insulating resin (for example an epoxy resin, such as commercially available two-component epoxy resin Huntsman CW229-3/HW229-1), in which a disconnector-earthing switch subassembly 3 and a vacuum breaker switch subassembly 4 connected in series with each other are arranged. The vacuum breaker switch subassembly 4 is completely embedded in a resin material of the housing 2 body 21, wherein the connection ends of its stationary contact 41 and moving contact 42 are protruded outside of the housing 2 body 21. The vacuum breaker switch subassembly 4 with its stationary contact 41 and by means of a rotating electrical joint subassembly 5 is electrically connected in series to the disconnector-earthing switch subassembly 3. The moving contact 42 is moveable relative to the stationary contact 41 along the longitudinal axis 04 of the vacuum breaker switch subassembly 4. The disconnector- earthing switch subassembly 3 comprises a chamber 31, in which a rotatable conductive connecting element 33 is arranged and connects in its specific angular positions the stationary contact 41 of the vacuum breaker switch subassembly 4 to a receiving output contact 61 connected to an electrical receiving output terminal 63 or alternatively to an earthing contact 62 connected to an electrical earthing terminal 64. The rotatable conductive connecting element 33 is embedded in a rotatable pin 32 made of dielectric material, wherein a first axial contact 331 of the rotatable conductive connecting element 33 protrudes from the rotatable pin 32 along its longitudinal axis 032, and a second radial rotatable contact 332 of the rotatable conductive connecting element 33 protrudes from a radial protrusion 323 of the rotatable pin 32 in the direction non-parallel relative to the rotation axis 032 of the rotatable pin 32. The first axial contact 331 and the second radial rotatable contact 332 constitute the opposite end parts of the rotatable conductive connecting element 33. The first axial contact 331 of the rotatable conductive connecting element 33 is _6_ electrically conductively connected to the rotating electrical joint subassembly 5. Whereas the second radial rotatable contact 332 moves in a circle in a result of a rotation of the rotatable pin 32 with the rotatable conductive connecting element 33 around the rotation axis 032. During this movement in a circle, the second radial rotatable contact 332 may be moved into position of an electrical contact with the receiving output contact 61 and into another position of an electrical contact with the earthing contact 62, wherein the contacts 61 and 62 are protruded opposite each other inwardly from the internal surface of the chamber 31 in the rotation plane P1-P1 of the second radial rotatable contact 332 of the rotatable conductive connecting element 33. The receiving output contact 61 and the earthing contact 62 each comprise two component contacts 611,621, wherein the second radial rotatable contact 332 of the rotatable conductive connecting element 33 is inserted between the component contacts 611,621 in the direction of the rotation axis 032 of the rotatable pin 32. ln this first embodiment of the breaker switch-disconnector-earthing switch assembly 1, the rotation axis O32 of the rotatable pin 32 with the rotatable conductive connecting element 33 coincides with the longitudinal axis 04 of the contacts 41,42 of the vacuum breaker switch subassembly 4. The rotating electrical joint subassembly 5 comprises a conductive intermediary element 51 on one side electrically connected to the stationary contact of the vacuum breaker switch subassembly 4 and on the other side electrically connected to the first axial contact 331 of the rotatable conductive connecting element 33. The electrical connection of the conductive intermediary element 51 to the stationary contact 41 of the vacuum breaker switch subassembly 4 is realized by contacting these elements directly with each other by means of a screw connection. Whereas electrical connection of the conductive intermediary element 51 to the first axial contact 331 of the rotatable conductive connecting element 33 is realized by means of a conductive spiral spring 53 arranged in a radial annular recess 521 formed in an opening 52 formed in the conductive intermediary element 51. The opening 522 with the radial annular recess 521 is concentric relative to the rotation axis O32 of the rotatable pin 32 and the first axial contact 331 of the rotatable conductive connecting element 33 is introduced into this opening 522 in such a manner that a spiral spring 53 arranged in the radial annular recess 521 is electrically conductively contacted on its internal side with this first axial contact 331 of the rotatable conductive connecting element 33 and is _7_ electrically conductively contacted on its eternal side with the surface of the radial annular recess 521. Thanks to that the rotation axis 032 of the rotatable pin 32 and rotatable conductive connecting element 33 coincides with the rotation axis 05 of the rotating electrical joint subassembly 5. Two longitudinal insulating partitions 321 made of dielectric material protrude on radial directions from the rotatable pin 32 and are extended along the axis of the rotatable pin 32 and surround and separate the second radial rotatable contact 332 in the plane P1-P1 which is perpendicular relative to the rotation axis O32 of the rotatable pin 32. These two insulating partitions 321 define between themselves on the side of the second radial rotatable contact 332 a salient angle oi, which preferably is not greater than 110°. Furthermore the disconnector-earthing switch subassembly 3 comprises a worm gear wheel 322 connected to the rotatable pin 32 above the longitudinal insulating partitions 312 and concentrically relative to the rotation axis O32 of the rotatable pin 32. The worm gear wheel 322 serves to control the angular position of the rotatable pin 32 and thus of the switching state of the second radial rotatable contact 332 of the rotatable conductive connecting element 33 relative to the receiving output contact 61 and the earthing contact 62. The teeth of the worm gear wheel 322 are accessible from the outside of the chamber 31 through the outlet of the chamber 31 on the side opposite relative to vacuum breaker switch subassembly 4 to enable the worm gear wheel 322 to be engaged with an appropriate driving control element not shown in Figs. 1-7. The rotatable pin 32 comprises an insulating collar 324 made of dielectric material 322 and circumferentially surrounding the rotating electrical joint subassembly 5. ln this first located on the side opposite relative to the worm gear wheel embodiment, the rotatable pin 32, its radial protrusion 323, the longitudinal insulating partitions 321, the worm gear w heel 322 and the insulating collar 324 form a single one monolithic dielectric element made of an electrical insulating resin, for example made of an epoxy resin, such as for example the commercially available two- component epoxy resin Huntsman CW229-3/HW229-1.

The second embodiment of the of the breaker switch-disconnector-earthing switch assembly 1, as shown in Figs. 8-9, comprises the rotatable pin 32 provided with four insulating partitions 321,3211, including two additional insulating partitions 3211 - which are additional in comparison with the first embodiment of Figs. 1-7 - which are arranged symmetrically to the insulating partitions 321 surrounding the second radial _8_ rotatable contact 332 of the rotatable conductive connecting element 33 relative to the plane which passes through the rotation axis 032 of the rotatable pin 32 and which is perpendicular relative to the protrusion direction of the second radial rotatable contact 332. ln this second embodiment, the second radial rotatable contact 332 of the rotatable conductive connecting element 33 is protruded directly from the rotatable pin 32, which is not provided with any radial protrusion, from which in the first embodiment the second radial rotatable contact is protruded.

Fig. 10 shows the third embodiment of the breaker switch-disconnector-earthing switch assembly 1. ln this third embodiment, the rotation axis O32 of the rotatable pin 32 with the rotatable conductive connecting element 33 coincides with the rotation axis 05 of the rotating electrical joint subassembly 5 but it does not coincide with the longitudinal axis 04 of the contacts 41,42 of the vacuum breaker switch subassembly 4 and it is perpendicular relative to this longitudinal axis 04. The outlet of the chamber 31 of the disconnector-earthing switch subassembly located on the side that is opposite relative to the vacuum breaker switch subassembly 4 is in this third embodiment closed with a rotatable cover 24. The cover 24 forms the housing 2 together with the body 3 and defines the channel 22 in the housing, wherein the driving worm 23 is arranged in the channel 22 and cooperates with the worm wheel 322 of the rotatable pin 32 arranged in the chamber 31. Furthermore a cylindrical socket 241 is formed on the internal side of the cover 24, wherein the end of the rotatable pin 32 is embedded in this socket. Furthermore, additionally relative to the first and second embodiments, the body 21 of the housing 2 in the third embodiment comprises a mounting protrusion 25 protruded downward from the bottom of the body 21 and provided with a threaded mounting opening 251 enabling the breaker switch-disconnector-earthing switch assembly 1 to be mounted on a base that is not shown in the drawings.

The above presented embodiments of the present utility model and the attached drawings are merely exemplary and are not to be considered as limiting the scope of the utility model protection that is defined in the Claims. For a skilled technician it is obvious to create a number of another variants of the present utility model, including new variants constituting combinations of the described embodiments of the present utility model. The figures are not necessarily to scale and some features may be _g_ exaggerated or minimized to better illustrate the present utility model. These and other factors however should not be considered as Iimiting the spirit of the utility model, the intended scope of protection of which is indicated in appended claims.

Claims

1.Claims A breaker switch-disconnector-earthing switch assembly (1) comprising ahousing (2) made of dielectric material, in which a disconnector-earthing switch subassembly (3) and a vacuum breaker switch subassembly (4) connected in series with each other are arranged, characterized in that the assembly (1) comprises a rotating electrical joint subassembly (5) forming an electrical series connection between the disconnector-earthing switch subassembly (3) and the vacuum breaker switch subassembly (4); and the disconnector-earthing switch subassembly (3) comprises -a chamber (31) in which a rotatable pin (32) made of dielectric material is arranged, wherein the rotation axis (032) of the rotatable pin (32) coincides with the rotation axis (05) of the rotating electrical joint subassembly (5); - a rotatable conductive connecting element (33) arranged in the chamber (31) and in the rotatable pin (32) and at one end electrically connected by means of the first axial contact (331) to the rotating electrical joint subassembly (5) and at the other end provided with the second radial rotatable contact (332) protruded from the rotatable pin (32) in the direction non-parallel relative to the rotation axis (O32) of the rotatable pin (32); - at least two insulating partitions (321) made of dielectric material and protruded from the rotatable pin (32) and surrounding the second radial rotatable contact (332) in the plane (P1-P1) perpendicular relative to the rotation axis (O32) of the rotatable pin (32), wherein the insulating partitions (321) define between themselves on the side of the second radial rotatable contact (332) a salient angle (d), which preferably is not greater than 110°; - a gear wheel (322), preferably a worm wheel, connected to the rotatable pin (32) and rotatable around the axis of rotation (O32) of the rotatable pin (32); - a receiving output contact (61) and an earthing contact (62) protruded inward from the internal surface of the chamber (31) in the rotation plane of the second radial rotatable contact (332) of the rotatable conductive connecting element (33) and connectable to the second radial rotatable contact (332) in specific angular positions of this rotatable contact (332); - an electrical receiving output terminal (63) and an electrical earthing terminal _12- (64) connected respectively to the receiving output contact (61) and the earthing contact (62). The breaker switch-disconnector-earthing switch assembly (1) according to Claim 1, characterized in that the dielectric rotatable pin (32) comprises a radia| protrusion (323) from which the second radia| rotatable contact (332) is protruded. The breaker switch-disconnector-earthing switch assembly (1) according to Claim 1 or 2, characterized in that the receiving output contact (61) and/or the earthing contact (62) each comprise two component contacts (611,621), wherein the second radia| rotatable contact (332) is inserted between the component contacts (611,621) in the direction of the rotation axis (032) of the rotatable pin (32). The breaker switch-disconnector-earthing switch assembly (1) according to Claim 1 or 2 or 3, characterized in that the rotating electrical joint subassembly (5) comprises a conductive intermediary element (51) electrically connected to a stationary contact (41) of the vacuum breaker switch subassembly (4) and comprising an opening (52) located concentrically relative to the rotation axis (O32) of the rotatable pin (32) and provided with a radia| annular recess (521), wherein in the radia| annular recess (521) a conductive spiral spring (53) is arranged and contacts a surface of the radia| annular recess (521) and contacts the first axial contact (331) of the rotatable conductive connecting element (33) located in the opening (52) of the conductive intermediary element (51 ). The breaker switch-disconnector-earthing switch assembly (1) according to any one of the preceding Claims 1-4, characterized in that the rotatable pin (32) comprises an insulating collar (324) made of dielectric material and circumferentially surrounding the rotating electrical joint subassembly (5). The breaker switch-disconnector-earthing switch assembly (1) according to any one of the preceding Claims 1-5, characterized in that the rotation axis (O32) of the rotatable pin (32) coincides with the longitudinal axis (04) of the contacts (41 ,42) of the vacuum breaker switch subassembly (4). _13- The breaker switch-disconnector-earthing switch assembly (1) according to any one of the preceding Claims 1-6, characterized in that the gear wheel (322) forms a monolithic element together with the rotatable pin (32) and is arranged in the chamber (31) of the disconnector-earthing switch subassembly (3). The breaker switch-disconnector-earthing switch assembly (1) according to any one of the preceding Claims 1-7, characterized in that the housing (2) is provided with a channel (22) in which a driving worm (23) is arranged and coupled with the gear wheel (322), preferably the worm wheel, of the rotatable pin (32). The breaker switch-disconnector-earthing switch assembly (1) according to any one of the preceding Claims 1-8, characterized in that the chamber (31) of the disconnector-earthing switch subassembly is provided with an outlet on the side that is opposite relative to the vacuum breaker switch subassembly (4), wherein the outlet is preferably closed with a cover (24) preferably with a rotatable COVGI”. The breaker switch-disconnector-earthing switch assembly (1) according to any one of the preceding Claims 1-9, characterized in that the housing (2) comprises a monolithic body (21) made of an electrical insulating resin, preferably made of an epoxy resin, and even more preferably made of a two- component epoxy resin.