EP1407466B1 - Switch lock for multipole electrical switchgear - Google Patents

Description

Technical area

The invention relates to a switching mechanism for multi-pole electrical switching devices, such as Circuit breaker and disconnector, according to the preamble of the independent claims.

State of the art

From the document US-3614685-A is a generic circuit breaker with a multipolar contact system known. The switch lock consists of a U-shaped Drive lever, with its outer legs tiltable in fixed Sides overlays and has an operating handle, from a toggle mechanism with an upper toggle lever, a lower toggle lever and a spring force accumulator, and from a pivotally mounted between the side panels Support lever. The knee levers are hinged together via a toggle lever axis. The spring energy accumulator engages between the toggle lever axis and the drive lever at. The lower toggle is hinged to a selector shaft. The shift shaft carries movable contact assemblies against the action of contact pressure springs within the so-called push-pull pivoting one-armed movable Contacts. The support lever is hinged to the upper toggle lever. After a release operation, the switch lock is reset by the Support lever by transferring the drive lever beyond its off position also in a supporting and standing under the action of the spring force accumulator connection with a latching mechanism operatively connected to release means to bring is. It is practiced prior art, such a switching mechanism in the way to transform it into a switch lock without tripping arises for a circuit breaker. On the one hand, the latching mechanism omitted and fixed on the other hand, the support lever. The disadvantage is that this additional components for fixing the support lever are required.

According to document DE-4442417-C1 a switch lock is known, each special Means for realizing the triggerable embodiment on the one hand and the on the other hand, having tripping incapable embodiment. In the triggerable embodiment serve at the rear of a drive lever provided bends for limiting the pivoting movement of the drive lever relative to one of a Verklinkungsmechanismus released support lever. In the disables Embodiment sets a specially designed, between fixed side panels arranged axis the support lever firmly.

Presentation of the invention

The invention is therefore the object of a conversion without additional parts from a switching mechanism with tripping into a switching mechanism without tripping to be able to make.

Starting from a switching mechanism of the type mentioned above, the object is achieved according to the invention by the characterizing features of the independent claims solved during the dependent claims advantageous developments of Invention are to be taken.

The solution is generally expressed that one and the same at a triggerable switch lock in a first position performing a specific function physical axis in a tripping disabled switch lock in one of the first position deviating second position is used to set the support lever Starting from a triggering switch lock, especially for a Circuit breaker is used, deleted in the proposed solution previous need for the installation of a tripping incapable switch lock, which is used in particular for a circuit breaker, additional parts use.

One in a triggering latch in a first position after the first Proposed solution in the drive lever positioned first axis or after the second Proposed solution in the side panels positioned further axis puts in between the side panels located second position the support lever firmly.

Advantageous developments of the invention are that corresponding holes in the drive lever and in the side panels or alone in the side panels for the two alternative positions that can be used for both types of switchgear Axis and a corresponding breakthrough in Stötzhebel to set the same are provided in the second position of the axis.

The displaceable axis is expediently as a bearing axis within the latching mechanism, as a stop axis relative to the support lever or as a spacer axis trained for the side panels. The at least partially identical training the displaceable axes leads to an additional part reduction.

Brief description of the drawings

Fig. 1:

ein Schaltschloss in Verbindung mit einem Schaltgerät in auseinander gezogener perspektivischer Darstellung;

Fig. 2:

eine erste erfindungsgemäße Ausführungsform des Schaltschlosses;

Fig. 3:

eine zweite erfindungsgemäße Ausführungsform des Schaltschlosses;

Fig. 4:

eine dritte erfindungsgemäße Ausführungsform des Schaltschlosses.

Further details and advantages of the invention will become apparent from the following, with reference to figures explained embodiments. Show it

Fig. 1:

a switching mechanism in connection with a switching device in exploded perspective view;

Fig. 2:

a first embodiment of the switch lock according to the invention;

3:

a second embodiment of the switching mechanism according to the invention;

4:

a third embodiment of the switching mechanism according to the invention.

Best way to carry out the invention

According to Fig. 1 is designed as a low-voltage circuit breaker three-pole Switching device 2 is provided with a double housing. Each of the three poles is one fixed contact arrangement with two fixed contact rails 4 and 6, a movable contact assembly 8 in the form of a rotationally symmetric pivotable Contact bridge and two arc extinguishing chambers 10 assigned together in a switching chamber housing, consisting of an upper part 11 and a lower part 12, are arranged. Each movable contact assembly 8 is in a switching shaft section 14, which in turn supports the switching chamber housing 11, 12. The three pivotable about a switching shaft axis 13 switching shaft sections 14 are via two connecting elements 15 rotationally connected to each other. The three Switch shaft sections 14 and the two connecting elements 15 form a for all poles common shift shaft 16. The fixed contact assemblies 4 and 6, the movable contact assemblies 8 and the shift shaft 16 form the three-pole contact system 17 of the switching device 2. The structure of such a Contact system and its installation and storage in such a switching chamber housing can be taken from the document EP1037239A2 in detail. The switching shaft 16 is coupled to a switching mechanism 7, the closing, opening and triggering the contact system 17 serves and arranged over the middle pole is. The lower part 12, the upper part 11 and the switching mechanism 7 are common Fastening means in the form of screws 20 and threaded holes 21, which are arranged in two-sided side panels 19 of the switching mechanism 7, positively connected with each other. The switching chamber housing 11, 12 and the Switching mechanism 7 are in one of a bottom part 22 and a cover part 24 existing Switchgear housing arranged. The cover part 22 is provided with a recess 26 provided by a provided with an arcuate aperture 29 drive lever 28 of the switching mechanism 7 projects with an operating handle 23 to the outside. In the finished state of the switching device 2, the bottom part 22 is screwed to the cover part 24, wherein the aperture 29 is located below the lid part 24.

According to Fig. 2a, 3a and 4a superimposed the U-shaped drive lever 28 for Circuit breaker provided triggering switch locks 72a, 73a and 74a opposite the actuating handle 23 with its outer legs 18 tiltable on journal 25, which are attached to the fixed side panels 19. The drive lever When the contact system is closed, 28 assumes an on position and at open contact system an off position or a tripped position, the are offset in the clockwise direction relative to the on position shown. The switch lock 72a, 73a and 74a, respectively, contain a toggle mechanism that can not be identified in detail 27 from a spring energy storage and connected to this upper as well as lower toggle levers. The closer structure of such a toggle mechanism is known from the aforementioned US-3614685-A. To the switch lock 72a, 73a and 74a further include an operative connection with not shown Release means standing latching mechanism 54 and an intermediate the side panels 19 pivotally mounted on a support lever axis 56 Support lever 58. The support lever 58 is pivotally connected to the upper toggle levers. Under the force of the spring force accumulator, the support lever 58 is supported via its own Verklinkungsfläche against a latch lever 52 of the latching mechanism 54 off. When exceeding predetermined limits of by the circuit breaker flowing current, in particular at a short-circuit current or over a certain time occurring overload current is determined by the Triggering a pawl 55 of Verklinkungsmechanismus 54 actuated and thus the Pawl lever 52 is disengaged from the support lever 58. This breaks that Knee lever system under the action of the spring force accumulator together, in whose As a result, the switching mechanism 72a, 73a or 74a enters the tripped state, wherein the lower toggle lever the contact system 17 of the switching device 2 (see Fig. 1) in the open state and transfer the support lever 58 to the Support lever axis 56 performs a counterclockwise rotation.

Of the above-described Schaltschlössem differ in FIG. 2b, 3b and 4b shown and provided for disconnect tripping unable Switch locks 72b, 73b and 74b essentially in that for a no Verklinkungsmechanismus is provided and on the other hand, the support lever 58 through an addition to the already existing support lever axis 56 between the side panels 19 immovable mounted axle is to be explained in more detail additional axis is free of play through a breakthrough 32, 33 and 34 of the Support lever 58 out. The blank breakthrough 32, 33 and 34 is clear from the Fig. 2a, 3a and 4a to see.

For the said axis is according to the first embodiment of FIG. 2a and 2b a between the drive lever 28 and the side panels 19 arranged displaceably provided first axis 42. The first axis 42 is in a first position in the triggerable switch lock 72a of FIG. 2a on both sides in first holes 62 of the Outside leg 18 of the U-shaped drive lever 28 is fixed and serves here, the pivoting movement of the drive lever 28 after a release operation against to limit the released from the linking mechanism 54 support lever 58. In contrast, the same axis 42 in a second position in the unlatching switch lock 72b as shown in FIG. 2b through the opening 32 of the Support lever 58 out and on both sides in second holes 82 of the side panels 19th established. The definition of the first axis 42 in the first and second holes 62 or 82 is advantageously carried out by riveting.

For the said axis is according to the second embodiment of FIG. 3a and 3b a displaceable within the side panels 19 arranged further axis in shape a stop axis 43 is provided. The stopper axis 43 is in a first position in the trippable switching mechanism 73a of FIG. 3a on both sides in another Drilled holes 63 of the side panels 19 and serves here, the pivoting movement the released in a triggering operation of the Verklinkungsmechanismus 54 Support lever 58 limit. In contrast, the same stop axis 43 in a second position in the tripping-disabled switching lock 73b shown in FIG. 3b guided through the opening 33 of the support lever 58 and on both sides in the second Drilled holes 83 of the side panels 19. The definition of the stop axis 43 in the further and second holes 63 and 83 is suitably carried out by Rivet.

For the said axis is according to the third embodiment of FIG. 4a and 4b a between the side panels 19 displaceably arranged further axis in the form of a Pawl axis 44 is provided. The pawl axis 44 is in a first position in the triggerable switch lock 74a according to FIG. 4a on both sides in further bores 64 set the side panels 19 and serves as a bearing axis of the latching mechanism 54 belonging pawl 55. The Verklinkungsmechanismus 54 points still a latch lever axis 44 ', which serves as a bearing axis for the latch lever 52 of the Ratchet mechanism 54 and serves as a spacer axis for the side panels 19 and at the triggering switch lock 74a shown in FIG. 4a on both sides in further holes 64 'of the side panels 19 is fixed. In contrast, the bearing axis 44 or 44 ' in a second position in the tripping incapable switch lock 74b according to FIG. 4b passed through the opening 34 of the support lever 58 and on both sides in second holes 84 of the side panels 19 set.

In the above-described embodiments of the switching mechanism according to the invention is no additional part for setting the support lever 58 at each tripping variant is required. To a further partial reduction arrives one, when the first axis 42 of Fig. 2a and the further axis, for example, the Stop axis 43 of FIG. 3a, are formed identically. To the same result one arrives when the pawl lever axis 44 'and a spacer axis 45 of Fig. 4a are identical. The spacer axis 45 is both in the triggerable Switching mechanism 74a according to FIG. 4a as well as in the tripping-disabled switch lock 74b defined in Fig. 4b on both sides in the side panels 19 and serves here together with other distance axes provided for elsewhere to the stable Spacing of side panels 19.

LIST OF REFERENCE NUMBERS

2

switchgear

4; 6

contact bars

7 ...

switch lock

8th

movable contact arrangement

10

Arc chutes

11

top

12

lower part

13

Shift shaft axis

14

Switching shaft sections

15

fasteners

16

shift shaft

17

Contact system

18

outer leg

19

side panels

20

screw

21

threaded mounts

22

the bottom part

23

operating handle

24

cover part

25

pivot

26

recess

27

Toggle mechanism

28

drive lever

29

cover

32 ... 34

breakthrough

42

first axis

43

stop axis

44

jack axis

44 '

Ratchet lever axis

45

distance axis

52

ratchet lever

54

latching mechanism

55

pawl

56

Support lever axis

58

support lever

62

first holes

63 ... 64

further drilling

82 ... 84

second holes

Claims (10)

1. Latching mechanism for multipole electrical switching devices, such as circuit breakers and switch disconnectors, comprising two side panels (19) which can be installed in a fixed form in a switching device (2), a U-shaped drive lever (28) which is provided with an operating handle (23) and whose outer limbs (18) are mounted in the side panels (19), and which assumes a connected position when the contact system (17) of the switching device (2) is closed while, in contrast, it assumes a disconnected position when the contact system (17) is open, furthermore comprising a toggle lever mechanism (27) having at least one upper toggle lever, at least one lower toggle lever and a spring energy store, with the toggle levers being connected in an articulated manner via a toggle lever shaft, the spring energy store acting between the toggle lever shaft and the drive lever (28), and in which case the lower toggle lever can be connected in an articulated manner to a switching shaft (16) which is connected to the contact system (17), and comprising a supporting lever (58) which is arranged between the side panels (19), is connected in an articulated manner to the upper toggle lever, is mounted such that it can pivot in the side panels (19) in a latching mechanism (72a) that can be tripped, and can be moved under the influence of the spring energy store to be connected in a supporting manner to a catch mechanism (54), which can itself be moved such that it is operatively connected to tripping means for the switching device (2), while, in contrast, the supporting lever (58) is fixed between the side panels (19) when the latching mechanism (72b) cannot be tripped, characterized in that a first shaft (42) is arranged in a first position between the outer limbs (18) when the latching mechanism (72a) can trip, with the pivoting movement of the drive lever (28) with respect to the supporting lever (58) which is released by the catch mechanism (54) being limited, while in contrast the first shaft (42) is arranged in a second position between the side panels (19) and is connected in an interlocking manner to the supporting lever (58) when the latching mechanism (72b) cannot trip.
2. Latching mechanism according to Claim 1, characterized in that first holes (62) are provided in the outer limbs (18) and second holes (82) are provided in the side panels (19) for the first shaft (42) in its first and second position, respectively, and in that an aperture (32) is provided in the supporting lever (58) for the first shaft (42) to pass through, essentially without any play, in its second position.
3. Latching mechanism for multipole electrical switching devices, such as circuit breakers and switch disconnectors, comprising two side panels (19) which can be installed in a fixed form in a switching device (2), a U-shaped drive lever (28) which is provided with an operating handle (23) and whose outer limbs (18) are mounted in the side panels (19), and which assumes a connected position when the contact system (17) of the switching device (2) is closed while, in contrast, it assumes a disconnected position when the contact system (17) is open, furthermore comprising a toggle lever mechanism (27) having at least one upper toggle lever, at least one lower toggle lever and a spring energy store, with the toggle levers being connected in an articulated manner via a toggle lever shaft, the spring energy store acting between the toggle lever shaft and drive lever (28), and in which case the lower toggle lever can be connected in an articulated manner to a switching shaft (16) which is connected to the contact system (17), and comprising a supporting lever (58) which is arranged between the side panels (19), is connected in an articulated manner to the upper toggle lever, is mounted such that it can pivot in the side panels (19) in a latching mechanism (73a; 74a) that can be tripped, and can be moved under the influence of the spring energy store to be connected in a supporting manner to a catch mechanism (54), which can itself be moved such that it is operatively connected to tripping means for the switching device (2), while, in contrast, the supporting lever (58) is fixed between the side panels (19) when the latching mechanism (73b; 74b) cannot be tripped, characterized in that a first shaft (43; 44; 44') which is arranged within the side panels (19) such that it can move is arranged in a first position when the latching mechanism (73a; 74a) can trip, while the first shaft (43; 44; 44') is in contrast arranged in a second position, and is connected in an interlocking manner to the supporting lever (58) when the latching mechanism (73b; 74b) cannot be tripped.
4. Latching mechanism according to Claim 3, characterized in that further holes (63; 64; 64') and second holes (83; 84) for the first shaft (43; 44; 44') are provided in the side panels (19) in the latter's first and second position, respectively, and in that an aperture (33; 34) is provided in the supporting lever (58) for the first shaft (43; 44; 44') to pass through essentially without any play in its second position.
5. Latching mechanism according to Claim 3, characterized in that, in its first position, the first shaft is in the form of a stop shaft (43) which limits the pivoting movement of the supporting lever (58) which is released by the catch mechanism (54).
6. Latching mechanism according to Claim 5, characterized in that a second shaft (42), which is arranged between the outer limbs (18), limits the pivoting movement of the drive lever (28) with respect to the supporting lever (58) which is released by the catch mechanism (54) when the latching mechanism (73a; 74a) can be tripped, and the stop shaft (43) is identical.
7. Latching mechanism according to Claim 3, characterized in that, in its first position as a bearing shaft (44; 44'), the first shaft is a component of the catch mechanism (54).
8. Latching mechanism according to Claim 7, characterized in that a catch (55) is mounted on the bearing shaft (44).
9. Latching mechanism according to Claim 7, characterized in that a catch lever (52) is mounted on the bearing shaft (44').
10. Latching mechanism according to Claim 9, characterized in that the bearing shaft (44') and a distance shaft (45) for the side panels (19) are identical.

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