BR112019017032B1 - SWITCH ARRANGEMENT - Google Patents

Abstract

the invention relates to an arrangement of switches (1) having two disconnectors (2, 3) and a circuit breaker (5). each disconnector (2, 3) has a contact connection (7, 9) and a contact element (13, 15) that is associated with the contact connection (7, 9). a current path that is connected to a third contact connection (11) can be interrupted by the circuit breaker (5). each contact element (13, 15) can be moved between a first switching position, wherein it electrically connects the contact connection (7, 9) with which it is associated and the third contact connection (11) to each other, and a second switching position, in which the contact connection (7, 9) with which it is associated and the third contact connection (11) are electrically isolated from each other.

Description

[001] The invention relates to an arrangement of switches comprising two disconnectors and a circuit breaker.

[002] Disconnectors are used in high and medium voltage installations in order to electrically disconnect parts of the installation from each other, for example in order to be able to carry out maintenance, inspection or conversion work in a safe manner. Disconnectors are switched without power, which means without electrical loads connected to the disconnector. In contrast, circuit breakers are designed to be able to disconnect current paths even under high current load, for example in the event of a short circuit, in order to protect parts of the installation against damage as a result of electrical overload. Due to their different functions, disconnectors and circuit breakers are generally combined with each other in high and medium voltage installations.

[003] The invention is based on the objective of specifying an improved switch arrangement comprising two disconnectors and a circuit breaker.

[004] The objective is achieved according to the invention through the aspects of claim 1.

[005] The dependent claims relate to advantageous embodiments of the invention.

[006] A switch arrangement according to the invention has two disconnectors and a circuit breaker. A first disconnector has a first contact connection and a contact element assigned to the first contact connection. The second disconnector has a second contact connection and a contact element assigned to the second contact connection. A current path connected to a third contact connection is interruptible by the circuit breaker. Each contact element is movable between a first switching position, in which it electrically connects the contact connection to which it is assigned and the third contact connection to each other, and a second switching position, in which the contact connection to which it is assigned and the third contact connection are electrically disconnected from each other.

[007] The switch arrangement thus has a third contact connection, which is both a circuit breaker contact connection and is contactable by the movable contact elements of both disconnectors. In this case, the third contact connection is divided into two, in particular, that is, the circuit breaker is electrically arranged between two contacts to disconnect or connect the current path between the contacts, that is, through the contact connection. As a result, the number of contact connections is reduced compared to switch arrangements in which the circuit breaker and disconnectors have mutually separate contact connections. This advantageously brings cost savings as a result of the direct integration of the circuit breaker into the disconnector arrangement. Furthermore, the local assembly expense for the switch array assembly is advantageously reduced. Furthermore, the direct integration of the circuit breaker into the switchgear arrangement advantageously makes it possible to reduce the space required for the switchgear arrangement.

[008] An embodiment of the invention provides that at least one of the contact elements is electrically connected to the third contact connection in its first switching position and is electrically disconnected from the third contact connection in its second switching position. This makes it possible to electrically disconnect the third contact connection and at least one of the other two contact connections by means of a contact disconnection between the assigned contact element and the third contact connection.

[009] A further embodiment of the invention provides that at least one of the contact elements is electrically connected to the contact connection to which it is assigned in its first switching position and is electrically disconnected from the contact connection to which it is assigned in its first switching position. second switching position. This advantageously enables the third contact connection to be electrically disconnected and at least one of the other two contact connections by means of a contact disconnection between said contact connection and the contact element assigned thereto.

[0010] A further embodiment of the invention provides at least one insulator column in which one of the contact connections is arranged. As a result, at least one contact connection can advantageously be arranged in an electrically isolated manner and sufficiently spatially separated from other components in which an electrical voltage is present.

[0011] A further embodiment of the invention provides that at least one of the contact elements is rotatable about a geometric axis of rotation extending parallel to a longitudinal geometric axis of an insulator column in which one of the contact connections is arranged. . This enables a contact element to be efficiently disconnected from a contact connection arranged in an insulator column.

[0012] A further embodiment of the invention provides that at least one of the contact elements is pivotable about a pivot axis extending perpendicular to a longitudinal axis of an insulator column in which one of the contact connections is arranged. . This enables a contact element to be efficiently disconnected from a contact connection arranged in an insulator column.

[0013] A further embodiment of the invention provides that at least one of the contact elements has two contact element sections connected together by a joint, and that an angle between the contact element sections is changed during the movement of said element contact between its two switching positions via the joint. As a result, it is advantageously possible to achieve a distance between a contact element and a contact connection by disconnecting the contact element from the contact connection by means of a bending movement of the contact element.

[0014] A further embodiment of the invention provides at least one motor drive for moving a contact element between its switching positions. As a result, an electrical contact between a contact element and a contact connection can advantageously be produced in an automated and safe manner with respect to operator control by means of a motor-driven movement of the contact element. Alternatively, instead of a motor drive, a manual drive can be provided to move a contact element between its switching positions.

[0015] A further embodiment of the invention provides that the circuit breaker is arranged in an insulator column. As a result, the circuit breaker can advantageously be simultaneously protected and electrically isolated from the environment outside the circuit breaker. The insulator column may be incorporated integrally, in a split manner or in a multipart manner in order to mutually isolate contacts of the third contact connection in particular.

[0016] A further embodiment of the invention provides that at least two contact connections are arranged at mutually different heights. This embodiment of the invention is directed to the use of the switch arrangement in switch panel installations in which a contact of the contact connections at mutually different heights is advantageous.

[0017] A further embodiment of the invention provides that the circuit breakers are arranged between the disconnectors. This configuration of the invention advantageously enables a particularly structurally simple embodiment of the switch arrangement since the disconnectors do not particularly restrict each other and both can be arranged at a relatively small distance from the circuit breaker.

[0018] A further embodiment of the invention provides that at least one disconnector has a rotary insulator, which is rotatable about its longitudinal geometric axes and is coupled to the contact element of said disconnector in such a way that the contact element is movable between their switching positions as a result of rotations of the rotary isolator. This configuration of the invention enables a contact element to be moved by means of a rotary isolator of a disconnector. This may be advantageous in particular if the contact element is arranged at an upper end of the rotary isolator, so that it is easier to drive the rotary isolator and transmit its movement to the contact element compared to directly driving the contact element. .

[0019] The above-described properties, aspects and advantages of this invention and the manner in which they are achieved will become clearer and more clearly understood in association with the following description of exemplary embodiments which are explained in more detail in association with the drawings, in which: FIG 1 shows a first exemplary embodiment of an arrangement of switches, FIG 2 shows a second exemplary embodiment of an arrangement of switches, FIG 3 shows a third exemplary embodiment of an arrangement of switches, FIG 4 shows a fourth exemplary embodiment of an arrangement of switches, FIG 5 shows an exemplary embodiment of the third contact connection 11 of circuit breaker 5 and FIG 6 shows an alternative exemplary embodiment of the third contact connection 11 of circuit breaker 5.

[0020] Mutually corresponding parts are provided with the same reference signs in the figures.

[0021] Figure 1 shows a first exemplary embodiment of an arrangement of switches 1 in a side view. The switch arrangement 1 comprises a first disconnector 2, a second disconnector 3 and a circuit breaker 5 arranged between the disconnectors 2, 3.

[0022] The first disconnector 2 has a first contact connection 7, a first contact element 13 assigned to the first contact connection 7, a first insulator column 17 and a first rotary insulator 23. The first rotary insulator 23 is arranged between the first insulator column 17 and the circuit breaker 5 and is incorporated as a rotatably mounted pin insulator. The first contact connection 7 is arranged on the first insulator column 17. The first contact element 13 is arranged on the first rotating insulator 23.

[0023] The second disconnector 3 is incorporated analogously to the first disconnector 2 and has a second contact connection 9, a second contact element 15 assigned to the second contact connection 9, a second insulator column 19 and a second rotating insulator 25. The second rotary insulator 25 is arranged between the second insulator column 19 and the circuit breaker 5 and is incorporated as a rotatably mounted pin insulator. The second contact connection 9 is arranged on the second insulator column 19. The second contact element 15 is arranged on the second rotating insulator 25.

[0024] The circuit breaker 5 is arranged on a third insulator column 21. A third contact connection 11 is arranged on the third insulator column 21. The contact connection 11 and the insulator column 21 are incorporated in a multipart manner, as per is described in more detail in the following exemplary embodiments, see Figures 5 and 6.

[0025] Each contact element 13, 15 is movable between a first switching position shown in Figure 1, in which it electrically connects the contact connection 7, 9 to which it is assigned and the third contact connection 11 to each other , and a second switching position, in which the contact connection 7, 9 to which it is assigned and the third contact connection 11 are electrically disconnected from each other.

[0026] For this purpose, the first contact element 13 has a first contact element section 13.1, which in the first switching position extends from the first rotary insulator 23 to the first contact connection 7 and is electrically connected thereto. , and a second contact element section 13.2, which in the first switching position extends from the first rotary insulator 23 to the third contact connection 11 and is electrically connected thereto. Both contact element sections 13.1, 13.2 are fixedly connected to the first rotary insulator 23. The first contact element 13 is moved between its switching positions by means of a rotation of the first rotary insulator 23 around a first geometric axis of rotation A, which coincides with a longitudinal geometric axis of the first rotating insulator 23 in this exemplary embodiment. In the event of a rotation from the first switching position shown in Figure 1 to the second switching position, the first contact element section 13.1 of the first contact element 13 is electrically disconnected and the first contact connection 7 and the second switching section contact element 13.1 of the first contact element 13 is electrically disconnected from the third contact connection 11.

[0027] The rotation of the first rotary insulator 23 and thus also the movement of the first contact element 13 are brought about by a first motor drive 33. The first motor drive 33 comprises a first motor 39, a first drive rod 43 and a first gear mechanism 47. For the rotation of the first rotating isolator 23, the first motor 39 causes the first drive rod 43 to perform rotations around its longitudinal geometric axis, which are transformed into rotations of the first rotating isolator 23 around the first geometric axis of rotation A by the first gear mechanism 47. The first motor 39 is an electric motor, for example.

[0028] Correspondingly, the second contact element 15 has a first contact element section 15.1, which in the first switching position extends from the second rotary insulator 25 to the second contact connection 9 and is electrically connected thereto, and a second contact element section 15.2, which in the first switching position extends from the second rotary insulator 25 to the third contact connection 11 and is electrically connected thereto. Both contact element sections 15.1, 15.2 are fixedly connected to the second rotary insulator 25. The second contact element 15 is moved between its switching positions by means of a rotation of the second rotary insulator 25 about a second geometric axis of rotation B, which coincides with a longitudinal geometric axis of the second rotating insulator 25 in this exemplary embodiment. In the event of a rotation from the first switching position shown in Figure 1 to the second switching position, the first contact element section 15.1 of the second contact element 15 is electrically disconnected from the second contact connection 7 and the second element section contact connection 15.1 of the second contact element 15 is electrically disconnected from the third contact connection 11.

[0029] The rotation of the second rotary insulator 25 and thus also the movement of the second contact element 15 are brought about by a second motor drive 35. The second motor drive 35 comprises a second motor 41, a second drive rod 45 and a second gear mechanism 49. For the rotation of the second rotating isolator 25, the second motor 41 causes the second drive rod 45 to perform rotations around its longitudinal geometric axis, which are transformed into rotations of the second rotating isolator 25 around the second geometric axis of rotation B by the second gear mechanism 49. The second motor 41 is also an electric motor, for example.

[0030] In the exemplary embodiment illustrated in Figure 1, the insulator columns 17, 19, 21 and the rotating insulators 23, 25 are arranged on a carrier 27 arranged on two supports 29, 31. The first motor 39 is arranged on a first support 29. The second motor 41 is arranged on the second support 31.

[0031] A circuit breaker drive 37 of the circuit breaker 5 is arranged on the carrier 27. The circuit breaker drive 37 is an elastic potential energy storage drive, for example.

[0032] A first connection cable 51 is connectable to the first contact connection 7. A second connection cable 53 is connectable to the second contact connection 9. The first contact connection 7 is incorporated as a fixed contact for receiving one end of the first contact element section 13.1 of the first contact element 13 in the first switching position. Correspondingly, the second contact connection 9 is incorporated as a fixed contact for receiving an end of the first contact element section 15.1 of the second contact element 15 in the first switching position. The third contact connection 11 is incorporated as a fixed contact for receiving an end of the second contact element section 13.2 of the first contact element 13 and for receiving an end of the second contact element section 15.2 of the second contact element 15 in the first switching position.

[0033] Figure 2 shows a second exemplary embodiment of an arrangement of switches 1 in a side view. As in the exemplary embodiment illustrated in Figure 1, the switch arrangement 1 comprises a first disconnector 2, a second disconnector 3 and a circuit breaker 5 arranged between disconnectors 2, 3. In a similar manner to the exemplary embodiment illustrated in Figure 1, each disconnector 2 , 3 has a contact connection 7, 9, a contact element 13, 15 assigned to the contact connection 7, 9, an insulator column 17, 19 on which the contact connection 7, 9 is arranged and a rotating insulator 23, 25. Each rotating insulator 23, 25 is again rotatable by a motor drive 33, 35 about a geometric axis of rotation A, B, which coincides with the longitudinal geometric axis of the rotating isolator 23, 25, in order of moving the contact element 13, 15 of the respective disconnector 2, 3 between two switching positions.

[0034] The switch arrangement 1 shown in Figure 2 differs from the exemplary embodiment illustrated in Figure 1 substantially only in terms of the arrangement of the insulator columns 17, 19, 21 and the rotary insulators 23, 25 and in terms of the embodiment of the switching elements. contact 13, 15.

[0035] The first insulator column 17 is arranged between the first rotary insulator 23 and the circuit breaker 5. Correspondingly, the second insulator column 19 is arranged between the second rotary insulator 25 and the circuit breaker 5. As in the exemplary embodiment illustrated in Figure 1, the circuit breaker 5 is arranged in a third insulator column 21, upon which a third contact connection 11 is arranged.

[0036] The first contact element 13 is pivotable about a first pivot axis C that extends perpendicular to the longitudinal axis of the third insulator column 21. In its first switching position shown in Figure 2, the first element contact element 13 electrically connects the first contact connection 7 to a third contact connection 11. In its second switching position indicated by dashed lines in Figure 2, the first contact element 13 is electrically disconnected from the third contact connection 11. Rotary movement of the first insulator column 17 is transformed into a pivoting movement of the first contact element 13 by a third gear mechanism 55.

[0037] The second contact element 15 is pivotable about a second pivot axis D that extends perpendicular to the longitudinal geometric axis of the third insulator column 21. In its first switching position shown in Figure 2, the second element contact element 15 electrically connects the second contact connection 9 to a third contact connection 11. In its second switching position indicated by dashed lines in Figure 2, the second contact element 15 is electrically disconnected from the third contact connection 11. Rotary movement of the second insulator column 19 is transformed into a pivoting movement of the second contact element 15 by a fourth gear mechanism 57.

[0038] Figure 3 shows a third exemplary embodiment of an arrangement of switches 1 in a side view. The switch arrangement 1 shown in Figure 3 differs from the exemplary embodiment illustrated in Figure 2 substantially only in that in this case, in addition to a pivoting movement, the contact elements 13, 15 of the disconnectors 2, 3 additionally perform a bending movement during movement between their switching positions.

[0039] For this purpose, each contact element 13, 15 has two contact element sections 13.1, 13.2, 15.1, 15.2 connected together by a joint 59, 61, wherein an angle between the contact element sections 13.1 , 13.2, 15.1, 15.2 is changed during the movement of said contact element 13, 15 between its two switching positions by means of joint 59, 61. In this case, the two contact element sections 13.1, 13.2 of the first switching element contact 13 are parallel to each other in the first switching position of said first contact element and are angled with respect to each other in the second switching position. Correspondingly, the two contact element sections 15.1, 15.2 of the second contact element 15 are parallel to each other in the first switching position of said second contact element and are angled with respect to each other in the second switching position.

[0040] Figure 4 shows a fourth exemplary embodiment of a switch arrangement 1 in a side view. The switch arrangement 1 shown in Figure 4 differs from the exemplary embodiment illustrated in Figure 3 substantially only in that the second disconnector 3 does not have a second insulator column 19 and the second contact connection 9 is not arranged in an insulator column 17. 19, 21, but instead about a component (not illustrated in more specific detail in Figure 4) of the switch arrangement 1 above the fourth gear mechanism 57 and the second rotary isolator 25, wherein the fourth gear mechanism 57 is in this case arranged on the insulator column 21 in which the circuit breaker 5 is arranged, rather than on an insulator column 19 separate from the second disconnector 3. In this case, the second contact element 15, in its second switching position, is electrically disconnected from the contact connection 9 assigned to it.

[0041] In the exemplary embodiments in Figures 1 to 4, the third contact connection 11 with circuit breaker 5 is illustrated only in principle. Figures 5 and 6 show exemplary embodiments of the contact connection 11 of the third insulator column 21 with circuit breaker 5 in more detail. The contact connection 11 comprises two contacts 11a and 11b, which are respectively assigned to a contact element 13, 15. The circuit breaker 5 is arranged between the contacts 11a and 11b and electrically disconnects or connects the current path between the contacts 11a and 11b, in a switchable manner.

[0042] In the exemplary embodiment in Figure 5, the insulator column 21 is incorporated for example in a tripartite manner, in a T-shape. At the end of each arm of the T-shape a contact 11a, 11b is arranged, the circuit breaker 5 being electrically switched between these contacts, in particular in an insulator column. It is also possible that more than one circuit breaker 5 is encompassed, in particular one circuit breaker 5 in each case in a T-shaped arm, incorporated as an insulator column.

[0043] The exemplary embodiment in Figure 6 encompasses a split insulator column 21 having two contacts 11a, 11b of the contact connection 11, said contacts being arranged one above the other. In the upper insulator column 21, a circuit breaker 5 is arranged inside in particular, between contacts 11a, 11b, which electrically opens or closes, i.e. turns on or off, the current path between contacts 11a, 11b. Contacts 11a, 11b face in opposite directions and are respectively assigned to a contact element 13, 15.

[0044] Although the invention has been more specifically illustrated and described in detail by means of preferred exemplary embodiments, the invention is however not restricted by the disclosed examples, and other variations may be derived therefrom by one skilled in the art, without departing from the scope protection of the invention.

List of reference signals

[0045] 1 Switch arrangement 2 First disconnector 3 Second disconnector 5 Circuit breaker 7 First contact connection 9 Second contact connection 11, (11a, 11b) Third contact connection 13 First contact element 13.1, 15.1 First contact element section 13.2, 15.2 Second contact element section 15 Second contact element 17 First insulator column 19 Second insulator column 21 Third insulator column 23 First rotating insulator 25 Second rotating insulator 27 Carrier 29 First support 31 Second support 33 First motor drive 35 Second motor drive 37 Circuit breaker drive 39 First motor 41 Second motor 43 First drive rod 45 Second drive rod 47 First gear mechanism 49 Second gear mechanism 51 First connecting cable 53 Second connecting cable 55 Third gear mechanism 57 Fourth gear mechanism 59 First joint 61 Second joint A First axis of rotation B Second axis of rotation C First axis of pivot D Second axis of pivot

Claims (11)

1. Switch arrangement (1), characterized by the fact that it comprises two disconnectors (2, 3) and a circuit breaker (5), wherein - a first disconnector (2) has a first contact connection (7) and an element contact element (13) assigned to the first contact connection (7), - the second disconnector (3) has a second contact connection (9) and a contact element (15) assigned to the second contact connection (9), - and a current path connected to a third contact connection (11) is interruptible by the circuit breaker (5), - wherein each contact element (13, 15) is movable between a first switching position, in which it electrically connects the contact connection (7, 9) to which it is assigned and the third contact connection (11) to each other, and a second switching position, in which the contact connection (7, 9) to which it is assigned and the third contact connection (11) are electrically disconnected from each other, wherein at least one of the contact elements (13, 15) has two contact element sections (13.1, 13.2, 15.1, 15.2) connected to each other by a joint (59, 61), and wherein an angle between the contact element sections (13.1, 13.2, 15.1, 15.2) is changed during movement of the contact element (13, 15) between its two switching positions through the gasket (59, 61). 2. Switch arrangement (1) according to claim 1, characterized in that at least one of the contact elements (13, 15) is electrically connected to the third contact connection (11) in its first switching position and is electrically disconnected from the third contact connection (11) in its second switching position. 3. Switch arrangement (1) according to claim 1 or 2, characterized in that at least one of the contact elements (13, 15) is electrically connected to the contact connection (7, 9) to which it is assigned in its first switching position and is electrically disconnected from the contact connection (7, 9) to which it is assigned in its second switching position. 4. Switch arrangement (1) according to claim 1 or 2, characterized in that at least one insulator column (17, 19, 21) in which one of the contact connections (7, 9, 11) is arranged. 5. Switch arrangement (1) according to claim 4, characterized by the fact that at least one of the contact elements (13, 15) is rotatable around a geometric axis of rotation (A, B) that extends parallel to a longitudinal geometric axis of an insulator column (17, 19, 21) in which one of the contact connections (7, 9, 11) is arranged. 6. Switch arrangement (1) according to claim 4, characterized by the fact that at least one of the contact elements (13, 15) is pivotable about a pivot axis (C, D) that extends perpendicular to a longitudinal geometric axis of an insulator column (17, 19, 21) in which one of the contact connections (7, 9, 11) is arranged. 7. Switch arrangement (1) according to claim 1 or 2, characterized in that it has at least one motor drive (33, 35) for moving a contact element (13, 15) between its switching positions . 8. Switch arrangement (1) according to claim 4, characterized in that the circuit breaker (5) is arranged in an insulator column (21). 9. Switch arrangement (1) according to claim 1 or 2, characterized in that at least two contact connections (7, 9, 11) are arranged at mutually different heights. 10. Arrangement of switches (1) according to claim 1 or 2, characterized in that the circuit breaker (5) is arranged between the disconnectors (2, 3). 11. Switch arrangement (1) according to claim 1 or 2, characterized by the fact that at least one disconnector (2, 3) has a rotating isolator (23, 25), which is rotatable around its geometric axes longitudinal and is coupled to the contact element (13, 15) of said disconnector (2, 3) so that the contact element (13, 15) is movable between its switching positions as a result of rotations of the rotary insulator (23, 25).