DE102014201308B4 - Switch module and multi-phase circuit breaker - Google Patents

Abstract

Switch module (1) for one phase of a multi-phase circuit breaker with a circuit breaker unit (4) which has three vacuum interrupters (17, 18, 19) in a triangular arrangement, and a circuit breaker unit (5) which is arranged correspondingly to the circuit breaker unit (4) and which for each vacuum interrupter ( 17, 18, 19) each having a disconnecting blade arrangement (20, 21, 22), the power switching unit (4) and disconnecting switching unit (5) being arranged between a first connection (2) and a second connection (3) of the switch module (1) and are attached via insulator support elements (6, 7, 8, 9) to a drive housing (14), in which drive housing (14) drives for the power switching unit (4) and disconnecting switching unit (5) are arranged, with each disconnecting blade arrangement (20, 21, 22) for Opening the circuit breaker unit (5) in an interior of the switch module (1) is pivotable.

Description

The invention relates to a switch module for one phase of a multi-phase circuit breaker.

A multi-phase power switch in the form of a generator switch is, for example, from DE 197 01 827 A1 known and has three phases, for each phase of the generator switch an arrangement of three vacuum interrupters in a delta arrangement as a power switching unit and aligned behind it is a switching unit for forming a dielectric isolating distance for each phase of the multi-phase circuit breaker. Such a multi-phase power switch in the form of a generator switch is provided, for example, in order to switch or interrupt high currents in the medium-voltage range.

From the utility model DE9202810U1 is also known generator circuit breaker arranged horizontally.

The object of the present invention is to specify a switch module for one phase of a multi-phase circuit breaker that has a simple and cost-effective design.

According to the invention, this is achieved by a switch module for one phase of a multi-phase circuit breaker with a circuit breaker unit, which has three vacuum interrupters in a triangular arrangement and a circuit breaker unit arranged correspondingly to the circuit breaker unit, which has a disconnect blade arrangement for each vacuum interrupter, with the circuit breaker unit and circuit breaker unit between a first terminal and are arranged at a second connection of the switch module and are fastened via insulator support elements to a drive housing, in which drive housing drives for the power switching unit and disconnecting switch unit are arranged.

Such a switch module for one phase of a multi-phase circuit breaker has a simple and cost-effective design because the switch module has all the components required to operate the switch module, such as power switching unit, isolating switching unit, first and second connection, insulator support elements for attachment to a drive housing and drive and for power switching unit . This makes it possible to test the function of the module as such, for example before it is installed on the multiphase circuit breaker, and to easily replace such a switch module as a whole in a multiphase circuit breaker if necessary. A triangular arrangement of the three vacuum interrupters of the power switching unit in the context of the present invention means an arrangement in which the three vacuum interrupters are located at the corner points of an equilateral triangle or, in other words, are arranged on a circle with a 120° division. The corresponding arrangement of the disconnector unit for the circuit breaker unit in the sense of the present invention is formed by an aligned arrangement of disconnector unit with circuit breaker unit, with a disconnecting blade arrangement of the disconnector unit adjoining each vacuum interrupter in alignment between the first connection and the second connection of the switch module, so that a The current path between the first connection and the second connection is formed via a vacuum interrupter and an isolating blade arrangement of the isolating switch unit, with the parallel connection of the three vacuum interrupters with respectively corresponding or aligned isolating blade arrangements providing the required high current-carrying capacity between the first connection and the second connection for one Phase of the multi-phase circuit breaker is allowed.

In this case, each isolating blade arrangement can be pivoted into an interior area of the switch module in order to open the isolating switch unit. The pivotability of each isolating blade arrangement of the isolating switching unit when opening in an interior area of the switch module ensures a compact and space-saving design because no isolating blade arrangement is pivoted outwards. The inner area of the switch module in the sense of the present invention is essentially formed by the inner space, which lies within the circle on which the vacuum interrupters are arranged in their triangular arrangement.

In a particularly preferred embodiment of the invention, a common disconnector shaft is provided for the disconnector blade assemblies, with at least one disconnector blade assembly being coupled to the disconnector shaft via a pull rod and at least one other disconnector blade assembly via a push rod. Such a common disconnector shaft for all disconnector blade assemblies of the switch module allows the disconnector blade assemblies to pivot in opposite directions in the interior of the switch module, because at least one disconnector blade assembly is coupled to the disconnector shaft via a pull rod and at least one other disconnector blade assembly is coupled via a push rod, so that a rotary movement of the a common disconnector shaft to at least one disconnector knife arrangement, a pulling movement is exerted, for example on a disconnection knife arrangement arranged at the top of the switch module with respect to the interior area, and on at least one further disconnection knife arrangement, for example two disconnection knife arrangements arranged below with respect to the interior area of the switch module, a pushing movement is exerted for pivoting into the interior area of the switch module.

The invention further relates to a multi-phase circuit breaker with a respective switch module according to one of the above embodiments for each phase of the multi-phase circuit breaker.

Such a multi-phase circuit breaker has a simple, cost-effective design because each of its switch modules can be tested and checked for functionality separately before installation and an individual module can be easily replaced in the operating state without dismantling the entire switch.

• 1 eine schematische Seitenansicht eines erfindungsgemäßen Schaltermodules in einer ersten Schaltstellung;
• 2 eine weitere schematische Seitenansicht des erfindungsgemäßen Schaltermodules der 1 in einer zweiten Schaltstellung;
• 3 eine dreidimensionale Ansicht des erfindungsgemäßen Schaltermodules in der Stellung der 2;
• 4 eine teilweise Ansicht der Trennschalteinheit des erfindungsgemäßen Schaltermodules in geschlossener Stellung; und
• 5 eine teilweise Ansicht der Trennschalteinheit des erfindungsgemäßen Schaltermodules in geöffneter Stellung.

The invention is explained in more detail below using the drawing and an exemplary embodiment with reference to the accompanying figures. Show it:

• 1 a schematic side view of a switch module according to the invention in a first switching position;
• 2 another schematic side view of the switch module according to the invention 1 in a second switching position;
• 3 a three-dimensional view of the switch module according to the invention in the position of 2 ;
• 4 a partial view of the circuit breaker unit of the switch module according to the invention in the closed position; and
• 5 a partial view of the circuit breaker unit of the switch module according to the invention in the open position.

1 shows a switch module 1 for one phase of a multi-phase circuit breaker in the form of a generator switch, which is not shown in more detail in the figures. The switch module 1 comprises a first connection 2 and a second connection 3, between which a power switching unit 4 and a power switching unit 4 connected in series isolating switching unit 5 are arranged. A current path is formed between the first connection 2 and the second connection 3 through the circuit-breaker unit 4 and the switch-disconnector unit 5, which is fastened to a drive housing 10 by insulator support elements 6, 7, 8 and 9, in which drive housing 10 drives, not shown in the figures, for the power switching unit 4 and the switch disconnector unit 5 are arranged. The drive housing 10 has fastening elements 11, 12 and 13 with which the switch module 1 can be fastened to the multi-phase circuit breaker. A drive linkage 14 connects the drive for the power switching unit to the power switching unit 4, a push rod 15 and a pull rod 16 connect the drive of the disconnector unit to the disconnector unit 5. The power switch unit 4 has three vacuum interrupters 17 to 19 arranged in a triangular arrangement, of which 1 only two are visible. The vacuum interrupter 17 is arranged in the exemplary embodiment at the top center of the switch module 1, the vacuum interrupters 18 and 19 are arranged one behind the other in the exemplary embodiment on the switch module 1, so that only the vacuum interrupter drawn with 18 can be seen. Triangular arrangement means that the vacuum interrupters 17, 18 and 19 are located on one of the corner points of an imaginary equilateral triangle or are arranged symmetrically on a circle with a 120° division. The isolating switch unit 5 comprises three isolating blade assemblies 20, 21 and 22, each of the isolating blade assemblies 20, 21 and 22 being arranged in the form of double isolating blade contacts corresponding or in other words aligned with one of the vacuum interrupters 17, 18 or 19, so that one vacuum interrupter and a correspondingly arranged isolating blade arrangement forms part of the current path between the first connection 2 and the second connection 3 of the switch module 1, the three current paths being connected in parallel with one another so that the required high current-carrying capacity of the switch module is ensured overall. The vacuum interrupters 17, 18 and 19 have contact systems arranged in a vacuum in their interior, consisting of a fixed contact and a moving contact, which are not shown in the figure, with the moving contact of the vacuum interrupters 17 to 19 being connected to the drive linkage 14 so that via the Drive linkage 14, a drive movement of the drive of the power switching unit can be introduced into the moving contacts of the vacuum interrupters 17 to 19 in order to switch or interrupt a current conducted via the switch module 1, so that an arc during a switching operation in the vacuum of the vacuum interrupters 17 to 19 when the current passes through zero the switch module 1 guided alternating current is solved. The separating blade assemblies 20, 21 and 22 are arranged corresponding to the vacuum interrupters 17 to 19, so the separating blade assembly 20 is associated with the vacuum interrupter 17, the separating blade assemblies 21 and 22 corresponding to the vacuum interrupters 18 and 19, respectively, the separating blade assembly 20 is connected or coupled to a disconnector shaft via the pull rod 16, which disconnector shaft is also provided for the disconnector blade assemblies 21 or 22, which are coupled via the push rod assembly 15 to the disconnector shaft, which is not shown in the figure and is common to all disconnector blade assemblies 20 to 23. At the connection points of the first connection 2 and power switching unit 4, of power switching unit 4 with switch disconnector unit 5 and of switch disconnector unit 5 with second connection 3, heat sinks 23, 24 and 25 are provided, which have cooling fins and for dissipating heat generated by the current flow to the environment are provided.

The power switching unit 4 is provided in the switch module 1 in order to switch or interrupt a current which is routed through the switch module 1, the switch disconnecting unit 5 is provided to form a dielectric isolating gap, for example for maintenance or repair work on a switch module 1 to be able to execute.

2 shows the switch module 1 in a position with the disconnector unit 5 open or interrupted, in which the disconnector blade arrangements 20, 21 and 22 are pivoted into an interior area of the switch module 1 by initiating a drive movement in the common disconnector shaft, so that the current path between the first connection 2 and second terminal 3 is interrupted and a dielectric isolating gap is formed through the opened isolating switching unit 5 . The isolating knife arrangement 20 was pulled downwards into the interior of the switch module 1 via the pull rods 16, and the isolating knife arrangements 21 and 22 were swiveled via the push rods 15 into a pushing movement upwards into the interior of the switch module 1, so that in particular none of the Disconnecting knife assemblies 20, 21 or 22 protrudes into the outer area of the switch module 1, and even when the switch disconnecting unit 5 is open, a compact structure of the switch module 1 is retained. The inner area of the switch module 1 is essentially formed by an outer peripheral circle within which the three vacuum interrupters are arranged in their triangular arrangement or within which the three isolating blade arrangements are also arranged in a corresponding triangular arrangement.

3 shows a three-dimensional view of the switch module 1, also with an interrupted switching unit 5, from which in particular the attachment of the current path via the insulator support elements 6 to 9 can be seen, which are arranged twice on both sides with respect to a longitudinal axis of the switch module 1 and for attachment to the drive housing 10 are provided.

4 shows a partial view of only the disconnector unit 5 with the upper disconnector blade assembly 20 and the lower front disconnector blade assembly 22 in a closed position of the disconnector unit 5, with the part of the current path adjoining the disconnector blade assemblies 20, 21 or 22 in the direction of the power switching unit 4 being shown for clarity representation in the 4 and 5 is not shown. The pull linkage 16 for coupling the disconnector shaft 26 to the disconnecting blade assembly 20 to initiate a pulling movement comprises a first driver 27, a first pull rod 28 and a second pull rod 29, the first pull rod 28 being pivotally connected to the first driver 27, which in turn is non-rotatably connected is arranged on the disconnector shaft 26. The first pull rod 28 is pivotally connected at its other end to a deflection lever 30 which in turn is pivotally attached to a bracket 31 . The second pull rod 29 is also fastened in a pivoted manner to the deflection lever 30, which in turn is fastened in a pivoted manner to the first isolating blade arrangement 20, so that by rotating the disconnector shaft 26 clockwise via the rotary movement of the first driver, a pulling movement is achieved via the first pull rod 28, the deflection lever 30, the second connecting rod 29 is introduced onto the separating knife arrangement 20 and leads to pivoting about a pivot bearing 32 of the separating knife arrangement 20 downwards. The push linkage 15 includes a second driver 33 which is fixed in a rotationally fixed manner to the common disconnector shaft 26 . A push rod 34 is pivotally attached to the second driver 33 and also pivotally attached to the isolating blade assembly 22, so that the clockwise rotation of the common disconnector shaft 26 causes a pushing movement via the second driver 33 and the push rod 34 to push onto the isolating blade assembly 22 and to a pivoting movement leads upwards into the interior of the switch module 1. The thrust linkage 15 further comprises a corresponding arrangement for the in the embodiment 4 and 5 not visible separating blade assembly 21, which is located behind the separating blade assembly 22. The clockwise rotary movement of the disconnector shaft 26 thus leads, as already described, to the pulling movement onto the disconnecting knife arrangement 20 and to the pushing movement towards the disconnecting knife arrangement 21 and 22, so that after the switching movement has been carried out, an open position or a dielectric isolating gap is formed through the opened disconnecting switch unit 5. like in the 5 shown, in which the Trennmes Seranordnung 20, 21 and 22 have all been pivoted into the interior of the switch module 1.

Reference List

1

switch module

2

first connection

3

second connection

4

power switching unit

5

circuit breaker unit

6,7,8,9

insulator support elements

10

drive housing

11,12,13

fasteners

14

drive linkage

15

thrust linkage

16

pull rods

17,18,19

vacuum interrupters

20,21,22

blade assemblies

23,24,25

heatsink

26

disconnector shaft

27

first taker

28

first drawbar

29

second drawbar

30

reversing lever

31

bracket

32

pivot bearing

33

second driver

34

push rod

35

pivot bearing

Claims (3)

Switch module (1) for one phase of a multi-phase circuit breaker with a power switching unit (4) which has three vacuum interrupters (17, 18, 19) in a triangular arrangement, and a disconnecting switch unit (5) which is arranged correspondingly to the power switching unit (4) and which has a disconnecting knife arrangement ( 20, 21, 22), wherein the power switching unit (4) and disconnecting switching unit (5) are arranged between a first connection (2) and a second connection (3) of the switch module (1) and are fastened to a drive housing (14) via insulator support elements (6, 7, 8, 9). are, in which drive housing (14) drives for power switching unit (4) and disconnector unit (5) are arranged, wherein each isolating blade arrangement (20, 21, 22) can be pivoted into an interior area of the switch module (1) in order to open the isolating switch unit (5). Switch module (1) according to claim 1 , characterized in that a common isolating switch shaft (26) is provided for the isolating knife arrangements (20, 21, 22), at least one isolating knife arrangement (20) being connected via a pull rod (15) and at least one further isolating knife arrangement (21, 22) being connected via a Push linkage (16) is coupled to the disconnector shaft (26). Multi-phase circuit breaker, each with a switch module (1) according to one of Claims 1 or 2 for each phase.

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