SK9890Y1 - Circuit breaker-disconnector-earthing switch arrangement - Google Patents

Abstract

Assembly (1) circuit breaker - disconnector - grounding device containing a housing (2) of dielectric material in which the subassembly (3) disconnecting device - grounding device and the assembly (4) circuit breaker with a vacuum chamber are electrically connected in series with each other, characterized in that the assembly ( 1) includes a sub-assembly (5) of a rotary electrical connector electrically connecting the sub-assembly (3) disconnector - earthing switch and the sub-assembly (4) of the circuit breaker with a vacuum chamber in series; and the sub-assembly (3) disconnector-earther contains a chamber (31) in which the pivot pin (32) is made of a dielectric material whose axis of rotation (O32) of the pivot pin (32) coincides with the axis of rotation (O5) of said sub-assembly (5) ) of the rotary electrical connector. The rotary conductive connector (33) is located in the chamber (31) and in the rotary pin (32) and is electrically connected at one end through a first axial contact (331) to the subassembly (5) of the rotary electrical connector and at the other end equipped with a second radial rotary contact (332) extending from said pivot (32) in a direction that is not parallel to its axis (O32) of rotation. At least two insulating partitions (321) are made of dielectric material, protrude from said pin (32) and surround the second radial rotary contact (332) in a plane (P1-P1) perpendicular to the axis of rotation (O32) of the pin (32) and clamp together a convex angle (α) on the side of the second radial rotary contact (332), which is preferably not greater than 110°. A gear (322), preferably a worm gear, is connected to the pin (32) and rotates about the axis of rotation (O32) of said pin (32). The receiving output contact (61) and the ground contact (62) project inwardly from the inner surface of the chamber (31) in the plane of rotation of said second radial rotary contact (332) and the rotary conductive connection element (33) and are connectable to the radial rotary contact (332). in certain angular contact positions (332). An electrical output terminal (63) and an electrical ground terminal (64) are connected to the receiving output contact (61) and to said ground contact (62).

Description

The field of technology

The subject of the technical solution is a circuit breaker - disconnector - earthing switch assembly containing a case made of dielectric material, in which the disconnector - earthing switch subassembly and the circuit breaker subassembly with a vacuum chamber are electrically connected in series.

Current state of the art

It is known from the state of the art to integrate a circuit breaker with a vacuum chamber and a changeover switch in the form of a circuit breaker and earthing switch, as described, forming a single unit.

For example, International Patent Application W00133593A1 describes such a circuit breaker-disconnector earthing assembly that includes a gas-insulated SF6 disconnector that is electrically connected in series to act as a line/ground switch and a vacuum chamber circuit breaker that can be used as a line circuit breaker for line protection. as well as a grounding device with the ability to close the circuit.

The essence of the technical solution

The objective of the technical solution in question is to provide an innovative alternative circuit breaker, disconnector and earthing device assembly.

The essence of the subject utility model is the circuit breaker - disconnector - grounding assembly described at the beginning containing a case made of dielectric material, in which the disconnector - grounding subassembly and the circuit breaker subassembly with a vacuum chamber are electrically connected in series, with the fact that the circuit breaker - disconnecting - grounding assembly contains a rotating an electrical joint sub-assembly forming an electrical serial connection between the disconnector-grounding sub-assembly and the circuit breaker sub-assembly with a vacuum chamber; and the disconnector-grounding subassembly includes a chamber with a pivot pin made of a dielectric material, the axis of rotation of which coincides with the axis of rotation of the electrical rotary connector subassembly;

- a rotary conductive connecting element located in said chamber in the rotary pin and electrically connected at one end to a first contact with the rotary electrical connector sub-assembly and at the other end containing a second radial rotary contact emanating from said rotary pin in a direction not parallel to its axis turning;

- at least two insulating partitions made of a dielectric material protruding from the rotary pin and surrounding the second radial rotary contact in a plane perpendicular to the axis of rotation of said pin and forming a convex angle between them on the side of the second radial rotary contact, preferably not greater than 110°;

- a gear wheel, preferably a worm wheel connected to a pivot pin and rotating around the axis of rotation of said pin;

- a receiving output contact and a grounding contact projecting inwardly from the inner surface of said chamber in the plane of rotation of said second radial rotary contact of the conductive connecting element and connectable to the radial rotary contact at certain angular positions of the rotary contact;

- an electrical receiving terminal and an electrical grounding terminal connected to the receiving output contact and the grounding contact, respectively.

Said dielectric pivot can advantageously have a radial projection formed on its side surface from which the second radial pivot contact protrudes.

In some advantageous embodiments of the presented technical solution, said receiving contact and/or grounding contact can each contain two sub-contacts, between which a second radial rotary contact is inserted in the direction of the axis of rotation of said rotary pin.

The electrical rotary connector sub-assembly of the respective circuit breaker-disconnector-grounding assembly may advantageously include a conductive intermediate element electrically connected to the fixed contact of said circuit breaker sub-assembly with a vacuum chamber and containing an opening concentric with the axis of rotation of said pivot with a radial annular recess, in which a conductive spiral spring is placed, which contacts the surface of the radial annular recess and said first contact of the conductive connecting element located in the opening of said conductive intermediate element.

According to the technical solution in question, it is advantageous for said pivot to include an insulating collar made of dielectric material and circumferentially surrounding the subassembly of the pivoting electrical connector.

The axis of rotation of the mentioned pivot pin of the respective circuit breaker - disconnector - earthing switch assembly preferably coincides with the vacuum chamber in the longitudinal axis of the contacts of the circuit breaker subassembly.

Said gear wheel is preferably a monolithic element with a pivot pin and is preferably housed in the chamber of said disconnector and grounding subassembly.

The housing of the circuit breaker - disconnector - earthing device assembly can advantageously contain a channel in which the drive screw cooperating with the gear wheel, preferably the screw wheel of the pivot pin, is located.

The chamber of the disconnector-grounding subassembly preferably has an outlet on the side opposite to the mentioned circuit breaker subassembly with a vacuum chamber, while this outlet is closed by a cover, preferably a rotating cover.

The housing of the respective circuit breaker-disconnector-grounding assembly may advantageously contain a monolithic body made of electrical insulating resin and even more preferably made of two-component epoxy resin, such as the commercially available two-component epoxy resin Huntsman CW229-3/HW229-1.

The assembly of circuit breaker - disconnector - earthing according to the technical solution in question has a simple and reliable construction, its use and maintenance is simple and does not require the use of SF6 insulation. The assemblies of the presented technical solution can be arranged in a simple way in a larger number (for example, in the number of three assemblies) on a common assembly base to create multi-phase (e.g. three-phase) circuit breaker - disconnector - earthing unit. Gear wheels of all circuit breaker - disconnector - earthing device assemblies according to the technical solution forming such a unit can be driven by one common drive worm.

Overview of images on drawings

The proposed technical solution is shown in advantageous embodiments in the attached drawings, in which:

fig. 1 shows an axonometric view of the first embodiment of the assembly circuit breaker - disconnector - earthing according to the technical solution in question, fig. 2 shows an axonometric view in section of the first embodiment of the assembly from fig. 1 in the position of the connection between the conductive connecting element and the grounding contact, fig. 3 shows a longitudinal section of the first embodiment from fig. 1 in the position of the connection of the conductive connecting element with the grounding contact, fig. 4 shows a cross-sectional view of the first embodiment from fig. 1 in the plane P1-P1 according to fig. 3 in the position of the connection of the conductive connecting element with the grounding contact, fig. 5 shows a sectional view of the first embodiment from fig. 1 in the plane P2-P2 marked in fig. 3 in the position of the connection of the conductive connecting element with the grounding contact, fig. 6 shows a sectional view of the first embodiment from fig. 1 in the plane P2-P2 marked in fig. 3 in the neutral fully disconnected position of the conductive connecting element, fig. 7 shows a sectional view of the first embodiment from fig. 1 in the plane P2-P2 marked in fig. 3 in the position of the connection of the conductive connecting element with the receiving output contact, fig. 8 shows a longitudinal section through the second embodiment of the circuit breaker - disconnector - grounding device assembly according to the subject technical solution in the position of connecting the conductive connecting element with the grounding contact, fig. 9 shows a cross-section of the second embodiment of FIG. 8 in the plane P1-P1 shown in fig. 8 in the position of the connection of the conductive connecting element with the grounding contact, fig. 10 shows a longitudinal section of the third variant of the circuit breaker - disconnector - earthing device assembly according to the technical solution in question in the position of the connection of the conductive connecting element with the grounding contact.

Implementation examples

The first embodiment of the circuit breaker-disconnector-earthing device assembly 1, shown in Figures 1-7, includes a housing 2 made of a dielectric material in the form of a monolithic body of electrical insulating resin (e.g. epoxy resin, such as the commercially available two-component epoxy resin Huntsman CW229-3/ HW229-1), which includes a disconnector and earthing sub-assembly 3 and a vacuum chamber circuit breaker sub-assembly 4, which are connected in series with each other. The circuit breaker subassembly 4 with a vacuum chamber is completely embedded in the resin material of the body 21 of the housing 2, while the connecting ends of its fixed contact 41 and movable contact 42 protrude outside the body 21 of the housing 2. Using the fixed contact 41 of the circuit breaker subassembly 4 with the vacuum chamber, it is electrically connected in series with disconnector and earthing subassembly 3 through rotary electrical connector subassembly 5. The movable contact 42 is movable with respect to the fixed contact 41 along the longitudinal axis O4 of the circuit breaker subassembly 4 with a vacuum chamber. The disconnector and earthing device assembly 3 includes a chamber 31 in which a rotatable conductive connecting element 33 connects in certain angular positions the fixed contact 41 of the circuit breaker assembly 4 with a vacuum chamber with a receiving output contact 61 connected to an electrical receiving output terminal 63 or alternatively to a grounding contact 62 connected to the electrical ground terminal 64. The rotary conductive connecting element 33 is embedded in the rotary pin 32 made of a dielectric material, while the first axial contact 331 of the rotary conductive connecting element 33 protrudes from the rotary pin 32 in a direction not parallel to the axis of rotation O32 of the rotary pin 32. The first axial contact 331 contact 331 and the second radial rotary contact 332 form the opposite end parts of said rotary conductive connecting element 33. The first axial contact 331 of the rotary conductive connecting element 33 is electrically conductively connected to the subassembly 5 of the rotary electrical connector. Meanwhile, the second radial rotary contact 332 performs a circular movement due to the rotation of the pin 32 with the rotary conductive connecting element 33 about the axis O32. During this movement in a circle, the second radial rotary contact 332 may have a position of electrical contact with the receiving output contact 61 or with the ground contact 62, which protrude from each other inwardly from the inner surface of the chamber 31 in the plane of rotation P1-P1 of the second radial rotary contact 332 of the rotary conductive connection element 33. The receiving output contact 61 and the grounding contact 62 each contain two partial contacts 611, 621, where the second radial rotary contact 332 of the rotary conductive connecting element 33 is inserted between the partial contacts 611, 621 in the direction of the axis O32 of the rotary pin 32. In this first design of assembly 1 circuit breaker - disconnector - earthing switch, the axis of rotation O32 of the rotary pin 32 with the rotary conductive connecting element 33 coincides with the longitudinal axis O4 of the contacts 41, 42. The subassembly 5 of the rotary electrical connector contains a conductive intermediate element 51 electrically connected on one side to the fixed contact 41 of the subassembly 4 of the circuit breaker with a vacuum chamber and on the other hand to the first axial contact 331 of the rotating conductive connecting element 33. The electrical connection of the conductive intermediate element 51 with the fixed contact 41 of the subassembly 4 of the circuit breaker with a vacuum chamber is realized by direct contact of these elements 51, 41 using a screw connection. The electrical connection of the conductive intermediate element 51 with the first axial contact 331 of the rotating conductive connecting element 33 is made as a conductive spiral spring 53 inserted into the radial annular recess 521 formed in the hole 52 formed in the conductive intermediate element 51.

The hole 52 with the radial annular recess 521 is concentric with the axis of rotation O32 of the pivot pin 32, and the first axial contact 331 of the rotary conductive connecting element 33 is introduced into the hole 52 so that the spring 53 placed in the recess 521 on the inner side conductively contacts the first axial contact 331 of the rotary of the conductive connecting element 33 and it conductively contacts the surface of the radial annular recess 521 from the outside. Due to this, the rotation axis O32 of the pivot pin 32 and the rotating conductive connecting element 33 coincides with the rotation axis O5 of the rotating electrical connector subassembly 5. Two longitudinal insulating baffles 321 made of dielectric material protrude in radial directions from the pivot pin 32 and are extended along the axis of the pivot pin 32 and surround and separate the second radial pivot contact 332 in the plane P1-P1 perpendicular to the rotation axis O32 of said pivot pin 32. These two longitudinal insulating compartments 321 define a convex angle α between them on the side of the mentioned second radial rotary contact 332, which is preferably not greater than 110°. The sub-assembly 3 of the disconnector and grounder further includes a gear wheel 322 connected to the pivot pin 32 above the longitudinal insulating partitions 321 and concentrically in the axis of rotation O32 of the pivot pin 32. The gear wheel 322 serves to control the angular position of the pivot pin 32, and thus the closing state of the second radial rotary contact 332 of the rotating conductive connecting element 33 with respect to the receiving output contact 61 and the grounding contact 62. Its teeth are accessible from the outside of the chamber 31 through the mouth of the chamber 31 on the side opposite to the subassembly 4 of the circuit breaker with a vacuum chamber for engaging the gear wheel 322 with the corresponding control, driving an element not shown in Figures 1-7. On the side opposite to the gear wheel 322, the pivot 32 includes an insulating collar 324, which is made of a dielectric material and circumferentially surrounds said subassembly 5 of the rotary electrical connector. In this first embodiment, the pivot 32, its radial projection 323, the longitudinal insulating partitions 321, the gear 322 and the insulating collar 324 form a single monolithic dielectric element made of an electrically insulating resin, for example an epoxy resin, such as the commercially available two-component epoxy resin Huntsman CW229 -3/HW229-1.

The second embodiment of the assembly 1 circuit breaker - disconnector - earthing device shown in figures 8 - 9 includes a pivot 32 with four insulating compartments 321, 3211, containing two additional insulating compartments 3211 - which are in addition to the first embodiment in figures 1 - 7, which are arranged symmetrically with respect to the insulating dams 321 surrounding the second radial rotary contact 332 of the rotary conductive connecting element 33 with respect to the plane passing through the axis of rotation O32 of the rotary pin 32 and perpendicular to the protruding direction of the second radial rotary contact 332. In this second embodiment, the second radial rotary contact 332 of the rotary conductive of the connecting element 33 directly from the rotary pin 32, which does not contain a radial projection, from which the second radial rotary contact protrudes in the first embodiment.

In fig. 10 shows the third embodiment of assembly 1 circuit breaker - disconnector - earthing switch. In this embodiment, the axis of rotation O32 of the rotary pin 32 with the rotary conductive connecting element 33 coincides with the axis of rotation O5 of the subassembly 5 of the rotary electrical connector, but does not coincide with the longitudinal axis O4 of the contacts 5 41, 42 of the subassembly 4 of the vacuum chamber, which is on it perpendicular. Exit chamber 31 assembly disconnector

- the earthing switch, which is located on the opposite side of the mentioned sub-assembly 4 of the circuit breaker with a vacuum chamber, in this third embodiment is closed by a rotating cover 24. This cover 24 together with the body 3 forms a casing 2 and defines a channel 22 in which the drive worm 23 cooperates with the worm by the wheel 322 of the pivot pin 32 located in the chamber 31. Furthermore, a cylindrical sleeve 241 is formed on the inner side of the cover 24, in which the end of the pivot pin 32 is embedded. In addition to the first and second embodiment, in the third embodiment, the body 21 of the housing 2 contains a mounting protrusion 25, which it protrudes with a threaded mounting hole 251 for mounting the circuit breaker - disconnector - earthing switch assembly 1, which is not shown in the picture.

The presented variants and attached drawings should not be considered as limiting the scope of protection of the given utility model as defined in the claims. For an expert in the field of the subject 15 technical solution, it is obvious that he will create a number of further implementations of the subject utility model, including new variants that are combinations of the presented variants of the model. To better illustrate the pattern in the image, some of its features may be exaggerated or reduced/enlarged without respecting the correct scale.

List of related brands assembly circuit breaker - disconnector - earthing switch case body channel drive screw cover

241 socket mounting lug

251 mounting hole subassembly disconnector - grounding chamber pivot pin

321 insulating compartment

3211 additional insulating compartment

322 gear wheel

323 radial protrusion

324 insulating collar swivel conductive connector

331 first axial contact

332 second radial rotary contact vacuum chamber circuit breaker subassembly fixed contact moving contact rotary electrical connector subassembly conductive spacer hole

521 radial annular withdrawal spiral spring receiving output contact

611 partial contact earthing contact

621 partial contact output terminal grounding terminal

O32 pivot axis of pivot (32)

O5 rotation axis of the subassembly (5) of the rotary electrical connector

O4 longitudinal axis of contacts (41, 42) of circuit breaker subassembly (4) with vacuum chamber

P plane perpendicular to the axis of rotation (O32) of the pin (32) α convex angle between the insulating partitions (321) on the side of the second radial rotary contact (332)

Claims (10)

1. Assembly (1) circuit breaker - disconnector - earthing device containing a housing (2) made of dielectric material, in which the subassembly (3) disconnector - earthing device and the assembly (4) circuit breaker with a vacuum chamber are mutually electrically connected in series, characterized in that assembly (1) includes a rotary electrical connector subassembly (5) electrically connecting the disconnector-grounding subassembly (3) and the circuit breaker subassembly (4) with a vacuum chamber in series; and the subassembly (3) disconnector - grounding device contains a chamber (31) in which the pivot pin (32) is made of a dielectric material whose axis of rotation (O32) of the pivot pin (32) coincides with the axis of rotation (O5) of said subassembly (5) ) of the rotary electrical connector; a rotary conductive connector (33) located in the chamber (31) and in the rotary pin (32) and electrically connected at one end via a first axial contact (331) to the subassembly (5) of the rotary electrical connector and at the other end equipped with a second radial rotary contact ( 332) extending from said pivot (32) in a direction that is not parallel to its axis of rotation (O32); at least two insulating partitions (321) made of a dielectric material and protruding from said pin (32) and surrounding the second radial rotary contact (332) in the plane (P1-P1) perpendicular to the axis of rotation (O32) of the pin (32) and mutually gripping the convex an angle (α) on the side of the second radial rotary contact (332), which is preferably not greater than 110°; a gear (322), preferably a worm gear, connected to the pin (32) and rotating about the axis of rotation (O32) of said pin (32); a receiving output contact (61) and a grounding contact (62) projecting inwardly from the inner surface of the chamber (31) in the plane of rotation of said second radial rotary contact (332) of the rotary conductive connection element (33) and connectable to the radial rotary contact (332) in certain angular contact positions (332); an electrical output terminal (63) and an electrical ground terminal (64) connected to the receiving output contact (61) and to said ground contact (62). 2. Assembly (1) circuit breaker - disconnector - grounding device according to claim 1, characterized in that the dielectric rotary pin (32) contains a radial projection (323) from which the second radial rotary contact (332) protrudes. 3. Assembly (1) switch - disconnector - grounding device according to claims 1 or 2, characterized in that the receiving output contact (61) and/or grounding contact (62) each contains two sub-contacts (611, 621), between which a second radial rotary contact (332) is inserted in the direction of the axis of rotation (O32) of the pivot pin (32). 4. Assembly (1) switch - disconnector - grounding device according to claims 1 or 2 or 3, characterized in that the subassembly (5) of the rotating electrical connector contains a conductive intermediate element (51) electrically connected to the fixed contact (41) of the said subassembly (4) ) circuit breaker with a vacuum chamber and containing an opening (52) with a radial annular recess (521) located concentrically with the axis of rotation (O32) of the pin (32) in which a conductive coil spring (53) is placed in contact with the surface of the radial annular recess (521) ) and with said first axial contact (331) of the rotatable conductive connecting element (33) located in the opening (52) of the conductive intermediate element (51). 5. Assembly (1) switch - disconnector - earthing according to any one of the preceding claims 1 to 4, characterized in that the pivot (32) contains an insulating collar (324) made of a dielectric material and a peripherally surrounding subassembly (5) of the rotary electrical connector . 6. Assembly (1) switch - disconnector - grounding device according to any one of the preceding claims 1 to 5, characterized in that the axis (O32) of rotation of the pivot pin (32) coincides with the longitudinal axis (O4) of the contacts (41, 42) of the subassembly (4) circuit breaker with vacuum chamber. 7. Assembly (1) switch - disconnector - earthing according to any one of the preceding claims 1 to 6, characterized in that the gear wheel (322) is a monolithic element with a pivot pin (32) and is stored in the chamber (31) of the subassembly (3) ) disconnector - grounding device. 8. Assembly (1) switch - disconnector - grounding device according to any one of the preceding claims 1 to 7, characterized in that the housing (2) contains a channel (22) in which the drive screw (23) is arranged cooperating with a toothed wheel (322), preferably a worm wheel, of a pivot (32). 9. Assembly (1) switch - disconnector - grounding device according to any one of the preceding claims 1 to 8, characterized in that the chamber (31) of the subassembly (3) disconnecting device - earthing device has an outlet on the side opposite to the subassembly (4) of the circuit breaker with a vacuum chamber , while the outlet is closed by a cover (24). 10. Assembly (1) switch - disconnector - grounding according to any one of the preceding claims 1 to 9, characterized in that said case (2) contains a monolithic body (21) made of electrical insulating resin, preferably epoxy resin and even more preferably two-component epoxy resin.