WO2015185368A1

WO2015185368A1 - Load transfer switch of an on-load tap changer, and continuous main switch and disconnecting switch therefor

Info

Publication number: WO2015185368A1
Application number: PCT/EP2015/061267
Authority: WO
Inventors: Klaus HÖPFL; Silke Wrede
Original assignee: Maschinenfabrik Reinhausen Gmbh
Priority date: 2014-06-02
Filing date: 2015-05-21
Publication date: 2015-12-10
Also published as: DE102014107722B3

Abstract

The invention relates to a switch (10) for a switching device (11), in particular a continuous main switch (10) or a disconnecting switch (10) for a load transfer switch (11) of an on-load tap changer, comprising: a primary lead-out contact (13); a primary fixed contact (14); a first primary movable contact (15) and a second primary movable contact (16), which can be moved jointly in relation to the primary lead-out contact (13) and the primary fixed contact (14) in such a way that the first and the second primary movable contact can assume a first end position, in which the first and the second primary movable contact lie against the primary lead-out contact (13) and the primary fixed contact (14), and a second end position, in which the first and the second primary movable contact are disconnected from the primary lead-out contact (13) and the primary fixed contact (14); wherein in the first end position, the primary lead-out contact (13) and the primary fixed contact (14) lie between the primary movable contacts (15, 16).

Description

LOAD SWITCH OF A LOAD TERMINAL SWITCH AND ALSO

DURATION MAIN SWITCH AND DISCONNECTOR THEREFORE

The invention relates to a diverter switch for an on-load tap changer of a variable transformer and a permanent main switch and a circuit breaker for a Lastum- switch an on-load tap changer and generally a switch for a switching device.

DE 10 2010 015 051 A1 describes a mechanical switching contact having at least two pivotable between two end positions, electrically conductively interconnected contact fingers, which are operatively connected via multi-lever joints with a drehba- Ren switching shaft, via rotating guide slots for operating the multi-lever joints and to coupled therewith deflection of the contact fingers has. This known switching contact is designed as a circuit breaker, circuit breaker or switch, in which the two contact fingers are mounted on an electrically conductive common axis which is arranged parallel to the switching shaft, each of the two contact fingers a separate mechanical, electrically conductive stop to form the respectively connected End positions of the disconnector, disconnector or changeover switch is assigned. The first contact finger abuts against its stop in a first end position of the switching contact and establishes an electrically conductive connection between the axis and the stop, while the second contact finger is lifted off its associated stop. The first contact finger is lifted in the second end position of the switching contact of the associated stop, while the second contact finger rests against the associated stop and makes an electrically conductive connection between the axis and the stop. If a current is passed through a contact finger and the contact adjacent to it, repulsion forces arise between them, which depend on the current intensity and at least 100 N for an on-load tap-changer, which is designed for short-time currents of 10 kA and more per switching contact can. The switching contact must apply a correspondingly high contact force in order to be able to hold the contact finger securely against the stop.

It is an object of the invention, in a switch for a diverter switch a Laststu- fenschalters the component load caused by the applied contact force to reduce.

This object is solved by the subject matters of the independent claims. Advantage- Further developments and embodiments of the invention are described in the dependent claims.

The invention proposes, according to a first aspect, a switch for a switching device, comprising

a primary leakage contact;

a primary fixed contact;

a first primary moving contact and a second primary moving contact, which are movable in common relative to the primary diverter contact and the primary stationary contact such that they bear a first end position in which they abut the primary diverter contact and the primary fixed contact, and a second end position in which they are separated from the primary Ableitkontakt and the primary fixed contact, can take;

in which

at least in the first end position of the primary Ableitkontakt, or at least a part thereof, and the primary fixed contact, or at least a part thereof, are located or arranged between the primary Bewegkontakten.

Thus, at least in the first end position, the primary moving contacts on opposite sides of the Ableitkontaktes and the primary fixed contact. The mutually opposite moving contacts attract in the same direction current flow, so that the applied by the proposed switch contact force is smaller compared to the known from DE 10 2010 015 051 A1 switching contact.

The proposed switch also allows a double interruption of the current path and a symmetrical structure with respect to the Ableitkontakt and the primary fixed contact. The proposed switch can be configured as desired in any manner, for example, as a permanent main switch or disconnector for a diverter switch an on-load tap changer, and / or for example at least one additional Ableitkontakt and / or at least one additional primary fixed contact and / or at least one additional first primary Move contact and / or comprise at least one additional second primary moving contact.

It can be provided that

the primary moving contacts for taking the first end position toward each other and for taking the second end position are moved away from one another or can be.

It can be provided that

at least in the second end position of the primary Ableitkontakt, or at least a part thereof, and the primary fixed contact, or at least a part thereof, lie or are arranged between the primary Bewegkontakten.

It can be provided that

the primary Ableitkontakt, or at least a part thereof, and the primary fixed contact, or at least a part thereof, are located or arranged between the primary Bewegkontakten.

Thus, the primary moving contacts are not only in the end positions, but also during a change from one end position to the other on opposite sides of the primary Ableitkontaktes and the primary fixed contact.

It can be provided that

at least in the first end position, the first primary moving contact with a first contact point on the primary Ableitkontakt and with a second contact point on the primary fixed contact and the second primary moving contact with a third contact point on the primary Ableitkontakt and with a fourth contact point the primary fixed contact is applied;

lies at least in the first end position of the primary Ableitkontakt between the first and the third contact point and the primary fixed contact between the second and the fourth contact point.

Thus, at least in the first end position, the abutment points on opposite sides of the primary Ableitkontaktes and the primary fixed contact.

It can be provided that

lies at least in the second end position of the primary Ableitkontakt between the first and the third contact point and the primary fixed contact between the second and the fourth contact point.

It can be provided that

the first primary moving contact is pivotally mounted about a primary pivot axis; and or

the second primary moving contact is pivotally mounted about the primary pivot axis or about another primary pivot axis. Preferably, the primary pivot axes are parallel or coaxial and / or intersects a straight line at least one of the primary pivot axes, the primary Ableitkontakt and the primary fixed contact.

It can be provided that

- The primary moving contacts are coupled such that a movement of a primary moving contact is transmitted to the other primary moving contact.

It can be provided that

the primary moving contacts are supported and / or coupled in such a way that they change from one end position to the other in a scissor-like or pincer-like movement.

It can be provided that each of the proposed switches comprises

a coupling mechanism coupled to the primary moving contacts and configured to transmit movement of a primary moving contact to the other primary moving contact. Preferably, the coupling mechanism is coupled to a drive mechanism.

It can be provided that

the coupling mechanism

A first leg which is pivotally coupled about a first coupling axis to the first primary moving contact, and

A second leg pivotally coupled to the second primary moving contact about a second coupling axis and pivotally coupled to the first leg about a third coupling axis;

the primary moving contacts are pivotally mounted about the primary pivot axis; the primary pivot axis is parallel and spaced from the coupling axes; - Each coupling axis is at a distance from the other coupling axes.

Thus, the coupling mechanism, the primary moving contacts and the primary pivot axis form a double knee joint.

Preferably, the first and / or second leg is coupled to a drive mechanism. It can be provided that each of the proposed switches comprises

a drive mechanism connected to the primary moving contacts, in particular via the coupling mechanism is coupled and adapted to move it to the first or the second end position.

The drive mechanism can be configured as desired in any desired manner and, for example, be coupled directly to the primary moving contacts or coupled to the coupling mechanism and thus indirectly to the primary moving contacts and / or for example at least one cam gear and / or at least one Coupling gear and / or at least one gear transmission and / or at least one Zykloidge- gear and / or at least one step transmission.

Preferably, the drive mechanism is designed such that it can be coupled to a drive source, such as a switching shaft of a diverter switch or an on-load tap changer.

It can be provided that

the drive mechanism comprises a cam gear, the

• has a first curve and

· A first cam in which the first curve is formed and which is pivotally mounted about a drive axis, and

A primary sampler coupled to at least one of the primary moving contacts and routed in the first curve.

The drive mechanism may be configured as desired in any manner and include, for example, at least one additional curve and / or at least one additional cam and / or at least one additional primary scanner.

Preferably, the first cam is non-rotatably coupled to a control shaft coaxial to the drive shaft and / or the drive axis is parallel to the primary pivot axis. It can be provided that

the drive mechanism is coupled to the coupling mechanism;

the drive axis is parallel to the primary pivot axis;

the primary pivot axis relative to the primary shunt contact and the primary

Fixed contact is stationary;

- The primary scanner is slidably mounted radially to the primary pivot axis and is rotatably coupled to the third coupling axis to the first leg and / or the second leg. It can be provided that each of the proposed switches comprises

a secondary hard contact;

a first secondary moving contact and a second secondary moving contact which are movable in common relative to the secondary and secondary fixed contacts so as to have a first end position in which they are applied to the secondary and secondary fixed contacts; and a second end position in which they are separated from the secondary Ableitkontakt and the secondary fixed contact can take;

in which

- At least in the first end position of the secondary Ableitkontakt, or at least a part thereof, and the secondary fixed contact, or at least a part thereof, are located between the secondary Bewegkontakten.

Thus, at least in the first end position, the secondary moving contacts on opposite sides of the secondary Ableitkontaktes and the secondary fixed contact.

Preferably, the first secondary moving contact is formed analogously to the first primary moving contact and / or the second secondary moving contact is analogous to the second primary moving contact.

It can be provided that

- The first secondary moving contact is pivotally mounted about a secondary pivot axis; and or

the second secondary moving contact is pivotally mounted about the secondary pivot axis or about another secondary pivot axis.

It can be provided that each of the proposed switches comprises

a coupling mechanism coupled to the secondary moving contacts and configured to transmit movement of a secondary moving contact to the other secondary moving contact.

Preferably, this coupling mechanism is formed analogous to the coupling mechanism for the primary moving contacts.

It can be provided that

the drive mechanism is coupled to the secondary moving contacts and adapted to move them to the first or second end positions. Preferably, the coupling of the drive mechanism to the coupling mechanism for the secondary moving contacts is analogous to the coupling of the drive mechanism to the coupling mechanism for the primary moving contacts.

It can be provided that

the cam gear

A secondary sampler coupled to at least one of the secondary moving contacts.

It can be provided that

the drive mechanism is coupled to the coupling mechanism for the secondary moving contacts;

the drive axis is parallel to the secondary pivot axis;

the secondary pivot axis is stationary relative to the secondary diverter contact and the secondary solid contact;

the secondary scanner is displaceably mounted radially relative to the secondary pivot axis and is rotatably coupled to the first leg and / or the second leg about the third coupling axis.

It can be provided that

the cam gear

• has a second curve and

A second cam, in which the second curve is formed and which is pivotally mounted about the drive axis, comprises;

the secondary scanner is guided in the second curve.

It can be provided that

the cams are arranged parallel and at a distance from each other;

the pickups lie between the cams.

It can be provided that

the cam gear

• has a third curve, in which the secondary scanner is guided and which is formed in the first cam; and or

• Has a fourth curve, in which the primary scanner is guided and which is formed in the second cam.

It can be provided that in at least one of the cams, one of the curves is narrower and deeper than the other curve.

It can be provided that each of the proposed switches comprises

an electrically conductive connecting plate, which is electrically conductively attached to the primary Ableitkontakt and the secondary Ableitkontakt.

The connecting plates can take over the mechanical support of the respective Ableitkontakte. If a plurality of such switches, which are associated, for example, each one phase of a three-phase network, side by side, in particular in a circle around the drive shaft or switching shaft around, are arranged, then an electrically conductive connection between the respective connecting plates can be easily made.

It can be provided that each of the proposed switches comprises

an electrically conductive connection support which is between the primary Ableitkontakt and the secondary Ableitkontakt;

an electrically conductive primary connection plate electrically conductively attached to the primary diverter contact and the connection support;

an electrically conductive secondary connection plate, which is electrically conductively attached to the secondary Ableitkontakt and the connection support.

The connecting plates and the connecting support can take over the mechanical support of the respective Ableitkontakte. If a plurality of such switches, which are associated, for example, each one phase of a three-phase network, juxtaposed, in particular in a circle around the drive shaft or switching shaft around, so in each case two adjacent switches an electrically conductive connection between the primary connecting plate of a switch be easily made with the secondary connecting plate of the other switch. This can be done for example with an additional electrically conductive connection support, which is located between the primary Ableitkontakt of a switch and the secondary Ableitkontakt the other switch and to which these Ableitkontakte are electrically conductively attached. If an electrical connection of the Ableitkontakte the phases is not desired, it can be used instead of this additional electrically conductive connection support an additional electrically insulating connection support to which these Ableitkontakte are attached. Each of these additional connection supports, whether electrically conductive or insulating, also improves the mechanical support of the respective Ableitkontakte. It can be provided that each of the proposed switches comprises

a bearing plate on which the primary Ableitkontakt and / or the primary fixed contact and / or at least one of the primary pivot axes and / or the secondary Ableitkontakt and / or the secondary fixed contact and / or at least one of the secondary secondary pivot axes is appropriate.

Preferably, the bearing plate is electrically insulating.

It can be provided that

the bearing plate has a guide slot for the primary scanner and / or a guide slot for the secondary scanner. Each guide slot allows the guide of the corresponding scanner radially to the respective pivot axis.

The invention proposes, according to a second aspect, a diverter switch for an on-load tap-changer, comprising

at least one permanent main switch comprising at least one switch according to the first aspect; and or

at least one circuit breaker, the at least one switch according to the first

Aspect includes.

The statements and explanations concerning one of the aspects of the invention, in particular with respect to individual features of this aspect, also apply analogously to the other aspects of the invention.

Embodiments of the invention will now be described by way of example with reference to the accompanying drawings. However, the individual features resulting therefrom are not limited to the individual embodiments, but can be connected and / or combined with individual features described above and / or with individual features of other embodiments. The details in the drawings are to be interpreted as illustrative, but not restrictive. The reference signs contained in the claims are not intended to limit the scope of the invention in any way, but merely refer to the embodiments shown in the drawings.

The drawings show in

FIG. 1 is a plan view of a first embodiment of a switch, referred to as Disconnector is designed for a diverter switch;

FIG. FIG. 2 is a rear perspective view of the circuit breaker of FIG. 1 ;

FIG. 3 is a front perspective view of the circuit breaker of FIG. 1 with additional components; FIG. 4 is a perspective view of a portion of a first embodiment of a three-phase diverter switch with a disconnect switch for each phase;

FIG. Fig. 5 is a plan view of a second embodiment of the switch, referred to as

Permanent main switch is designed for a diverter switch; FIG. 6 is a rear perspective view of the permanent master switch of FIG. 5;

FIG. 7 is a front perspective view of the permanent master switch of FIG. 5 with additional components;

FIG. 8 is a perspective view of a portion of a second embodiment of a three-phase diverter switch with a permanent main switch for each phase.

In FIGS. 1, 2 and 3, a first embodiment of a switch 10 for a switching device 1 1 (FIG. 4) is shown schematically, which here is for example a disconnector 10 for a diverter switch 1 1 (FIG. 4) of an on-load tap changer, not shown.

In this embodiment, the circuit breaker 10 comprises a bearing plate 12 (not shown in FIG. 2), a primary discharge contact 13, a primary fixed contact 14, a first primary moving contact 15, a second primary moving contact 16, a primary pivot axis 17 , a secondary Ableitkontakt 18, a secondary fixed contact 19, a first secondary moving contact 20, a second secondary moving contact 21, a secondary pivot axis 22, two coupling mechanisms 23 each having a first leg 231, a second leg 232, a first Coupling axis 233, a second coupling axis 234 and a third coupling axis 235 and a drive mechanism 24th

On the bearing plate 12, the Ableitkontakte 13, 18, the fixed contacts 14, 19 and the pivot axes 17, 22 are attached. The Ableitkontakte 13, 18 and the fixed contacts 14, 19 are rod-shaped and parallel to a not shown switching shaft of the load Switch 1 1 aligned, which is coaxial with a drive axle 25. The remaining axes 17, 22, 233, 234, 235 are also parallel to the drive axle 25.

The primary Ableitkontakt 13 and the primary fixed contact 14 are located on a radius of the drive shaft 25, wherein the primary Ableitkontakt 13 between the primary fixed contact 14 and the drive shaft 25 is located. The secondary leakage contact 18 and the secondary

Fixed contact 19 are on a different radius of the drive shaft 25, wherein the secondary Ableitkontakt 18 between the secondary fixed contact 19 and the drive shaft 25 is located.

The primary moving contacts 15, 16 are pivotally mounted about the primary pivot axis 17 on the bearing plate 12 and together relative to the primary Ableitkontakt 13 and the primary fixed contact 14 so movable that they have a first end position in which they at these contacts 13, 14 abut, and a second end position in which they are separated from these contacts 13, 14, can take. In the first end position shown in FIG. 1 to 3, as well as in the second end position, which is analogous to the second end position of the secondary moving contacts 20, 21 explained below, the primary discharge contact 13 and the primary fixed contact 14 are located between these moving contacts 15, 16.

Similarly, the secondary moving contacts 20, 21 are pivotally mounted about the secondary pivot axis 22 on the bearing plate 12 and movable relative to the secondary Ableitkontakt 18 and the secondary fixed contact 19 so that they analogous to the primary side, a first end position, in which they rest on these contacts 18, 19, and a second end position in which they are separated from these contacts 18, 19, can take. In the first end position, which is analogous to the above-explained first end position of the primary moving contacts 15, 16, as well as in the second end position shown in FIG. 1-3, the secondary leakage contact 18 and the secondary fixed contact 19 are analogous to the primary side between these moving contacts 20, 21.

The primary moving contacts 15, 16 and the secondary moving contacts 20, 21 are respectively mounted and coupled by means of the respective coupling mechanisms 23, that they each change in a scissor-like or pincer-like movement from one end position to the other. Each coupling mechanism 23 is coupled to the associated moving contacts and designed such that it transmits a movement of a moving contact to the other moving contact. For this purpose, in each case the first leg 231 is pivotable about the first coupling axis 233 to the respective first moving contact 15, 20 and the second leg 232, the second coupling axis 234 is pivotally coupled to the respective second moving contact 16, 21 and about the third coupling axis 235 pivotally coupled to the first leg 231. In addition, each of the pivot axis 17, 22 is parallel and at a distance from the respective coupling axes 233, 234, 235 and each coupling axis with distance to the other coupling axes.

The drive mechanism 24 is coupled via the coupling mechanisms 23 to the moving contacts 15, 16, 20, 21 and designed such that it can move them to the first or the second end position.

In this embodiment, the drive mechanism 24 is a cam gear and includes a first cam 26, a second cam 27 (not shown in FIGS. 1, 2), a primary pickup 28 and a secondary pickup 29, and has a first cam 30 formed in the first cam 26 and a second cam 31 formed in the second cam 27. The cams 26, 27 are pivotally mounted about the drive axle 25 by being non-rotatably coupled to the control shaft 25 coaxial to the drive shaft, and arranged upside down to each other such that their curves 30, 31 face each other. The primary sampler 28 is guided in the first curve 30 (FIG. 2), the secondary sampler 29 in the second curve 31 (FIG. 3). The cams 26, 27 are identical and arranged in parallel and spaced from each other, and between them are the scanners 28, 29. The primary scanner 28 includes a cam follower rotatably mounted on the in FIG. 2 lower end of the associated third coupling axis 235 is mounted. Consequently, it is coupled via the associated coupling mechanism 23 to the primary moving contacts 15, 16. The primary pivot axis 17 is attached to the bearing plate 12 and thus fixed relative to the primary Ableitkontakt 13 and the primary fixed contact 14. The third coupling axis 235 extends downwardly through a first guide contour 32 (FIG. 1) in the bearing plate 12, so that it is guided in this guide contour 32 and its lower end lies with the primary scanner 28 under the bearing plate 12. The first guide contour 32 is formed here by way of example as a slot which lies radially extending between the drive shaft 25 and the stationary primary pivot axis 17, so that the primary scanner 28 radi ally slidably mounted to the primary pivot axis 17 and the third coupling axis 235th is rotatably coupled to the legs 231, 232.

The coupling of the drive mechanism 24 to the coupling mechanism 23 for the secondary moving contacts 20, 21 is analogous to the coupling of the drive mechanism 24th to the coupling mechanism 23 for the primary moving contacts 15, 16th

The secondary scanner 29 includes a cam follower rotatably mounted on the cam follower shown in FIG. 2 upper end of the associated third coupling axis 235 is mounted. Consequently, it is coupled via the associated coupling mechanism 23 to the secondary moving contacts 20, 21. The secondary pivot axis 22 is attached to the bearing plate 12 and thus fixed relative to the secondary Ableitkontakt 18 and the secondary fixed contact 19. The third coupling axis 235 extends downwards into a second guide contour 32 (FIG. 1) in the bearing plate 12, so that it is guided in this guide contour 32. The second guide contour 32 is here, analogous to the first guide contour 32, formed by way of example as a slot extending radially between the drive shaft 25 and the stationary secondary pivot axis 22, so that the secondary scanner 29 radially slidably mounted to the secondary pivot axis 22 and is rotatably coupled to the associated third coupling axis 235 to the associated legs 231, 232.

When the first cam 26 is rotated counterclockwise by turning the selector shaft to a first end position shown in FIG. 1, 2, 3 is rotated, the primary scanner 28 is moved away from the first cam 30 radially away from the drive axle 25 and radially toward the primary pivot axle 17 until it reaches the radially outer end of the first cam 30 has reached. As a result, the distance between the associated first and second coupling axis 233, 234 is increased and the primary moving contacts 15, 16 are moved towards each other in a scissor-like or pincer-like motion and pressed against the lying between them primary Ableitkontakt 13 and primary fixed contact 14 ,

When the second cam 27 by turning the stem counterclockwise to a second end position, which in FIG. 1, 2, 3 is rotated, the secondary scanner 29 is moved away from the second cam 31 radially toward the drive axle 25 and radially away from the secondary cam axle 22 until it reaches the radially inward end of the second cam 31 has reached. As a result, the distance between the associated first and the second coupling axis 233, 234 is reduced and the secondary moving contacts 20, 21 are moved away from each other in a scissor-like or pincer-like movement and lifted off the lying between them secondary Ableitkontakt 18 and secondary fixed contact 19 ,

If the first cam 26 by turning the stem clockwise to a second end position, not shown, but analogous to the second end position of the two th cam 27 in FIG. 1, 2, 3 is rotated, the primary scanner 28 is moved radially away from the first cam 30 toward the drive axis 25 and radially away from the primary pivot axis 17 until it reaches the radially inward end of the first cam 30 has reached. In this way, the distance between the associated first and second coupling axes 233, 234 is reduced and the primary moving contacts 15, 16 are moved away from each other in a scissor-like or pincer-like motion and from the primary discharge contact 13 and primary fixed contact between them 14 lifted off.

If the second cam 27 by turning the switching shaft in a clockwise direction in a first end position, which is not shown, but analogous to the first end position of the first cam 26 in FIG. 1, 2, 3 is rotated, the secondary scanner 29 is moved away from the second cam 31 radially away from the drive axle 25 and radially toward the secondary cam axle 22 until it reaches the radially outer end of the second cam 31 has reached. As a result, the distance between the associated first and second coupling axes 233, 234 is increased and the secondary

Moving contacts 20, 21 moves toward each other in a scissor-like or pincer-like movement and pressed against the secondary Ableitkontakt 18 and secondary fixed contact 19 lying between them.

The curves 30, 31 in the identical cams 26, 27 are formed and offset from each other about the drive axis 25 that the first curve 30 in the first end position and at the same time the second curve 31 in the second disfigurement, as shown in FIG. 1, 2, 3 that the first curve 30 in the second end position and at the same time the second curve 31 in the first dislocation, and that in a transition phase between the two end positions, the rotation angle about the drive axis 25 of about 70 ° corresponds, both the primary moving contacts 15, 16 and the secondary moving contacts 20, 21 in the first end position, that is closed, are.

In this embodiment, the cams 26, 27 each have two additional identical curves, offset by 120 ° about the drive axis 25, so that they can simultaneously drive two additional circuit breakers 10 (FIG 4), each about 120 ° about the drive axis 25th are arranged offset.

In this embodiment, the disconnecting switch 10 comprises two electrically conductive connecting plates 33 (not shown in FIG. 1), which are fastened to the deflecting contacts 13, 18 in an electrically conductive manner at the top and bottom. The pivot axes 17, 22 are above and below attached to the connecting plates 33, and the lower connecting plate 33 is fixed to the bearing plate 12. Thus, they are attached via this lower connecting plate 33 to the bearing plate 12.

In this embodiment, each moving contact 15, 16, 20, 21 six electrically conductive contact blades or contact blades 34, for example made of solid copper, and a C-shaped, in particular as needed electrically conductive or electrically insulating contact holder 35 having a top wall, a bottom wall and a back wall. The contact blades 34 are identical and stacked one above the other. This stack is arranged between the upper and the lower wall of the contact holder 35 and with two guide pins 36 which go through parallel slots (not shown) in the contact blades 34 and made of metal, mounted movably on these walls. The contact blades 34 of a stack are supported with their from the respective Ableitkontakt 13, 18 and fixed contact 14, 19 pioneering back surfaces on compression springs, not shown on the rear wall of the respective contact holder 35 from. As a result, the contact blades 34 in their first end position are resiliently biased against the respective discharge contact 13, 18 and fixed contact 14, 19.

The primary pivot axis 17 is held in the upper and lower walls of both contact holders 35 of the primary moving contacts 15, 16, the associated first coupling axis 233 in the upper and lower walls of the contact holder 35 of the first Bewegkon- clock 15, and the associated second coupling axis 234 in the upper and lower walls of the contact holder 35 of the second primary moving contact 16th

In FIG. 4, a first embodiment of a three-phase diverter switch 1 1 is shown schematically in a partial section.

In this embodiment, the diverter switch 1 1 for each phase U, V, W comprises a circuit breaker 10U, 10V, 10W according to the first embodiment, the circular symmetry about 120 ° offset from the drive axis 25 are arranged. The circuit breakers 10U, 10V, 10W are analogous to the circuit breaker 10 of FIG. 1 to 3 coupled to the two cams 26, 27.

The diverter switch 1 1 also comprises three electrically conductive connection supports 37, which are also arranged circular symmetrically offset by 120 ° about the drive axis 25 and each lie between two adjacent circuit breakers 10. At each connection support 37, the respective connecting plates 33 of the associated adjacent circuit breaker 10 are electrically and electrically fixed at the top and bottom. In this embodiment, the diverter switch 1 1 comprises, by way of example, four vacuum interrupters, not shown, and two tube holders 38 for each phase. The vacuum interrupters are each mounted in pairs under an associated tube holder 35 and electrically conductively connected to one of the respective stationary contacts 14, 19.

In FIGS. 5, 6 and 7, a second embodiment of the switch 10 is schematically illustrated, which by way of example is a permanent main switch 10 for a diverter switch 1 1 (FIG 8) of an on-load tap changer, not shown. This second embodiment is similar to the first embodiment, so that in the following the differences are explained in more detail.

In this embodiment, the fixed contacts 14, 19 are not attached to the bearing plate 12, but by way of example on a frame, not shown, of the diverter switch 1 1 or can be attached thereto. This frame is for example a contact cylinder, which is designed in particular as an oil vessel. In this embodiment, the drive mechanism 24 has a third cam 39 formed in the first cam 26 (not shown in FIGS. 5, 6) and a fourth cam 40 formed in the second cam 27. The third curve 39 is narrower and deeper than the first curve 30. The fourth curve 40 is narrower and deeper than the second curve 31. The secondary scanner 29 is guided in the third curve 39 (FIG. 6), whose course corresponds to that of the second curve 31 and is parallel thereto when the cams 26, 27 are properly mounted on the control shaft. The primary scanner 28 is guided in the fourth curve 40 (FIG. 7), the course of which corresponds to that of the first curve 30 and is parallel thereto when the cams 26, 27 are properly attached to the control shaft. In this embodiment, the primary scanner 28 includes a second, upper cam roller rotatably mounted on the one shown in FIG. 6 upper end of the associated third coupling axis 235 is mounted. This upper cam follower has a smaller diameter than the first lower cam follower of the primary scanner 28. The secondary cam follower 29 includes a second lower upper cam follower rotatably mounted on the cam follower shown in FIG. 6 lower end of the associated third coupling axis 235 is mounted. This lower cam roller has a larger diameter than the first, upper cam roller of the secondary scanner 29. The scanners 28, 29 are identical, but the one is arranged upside down compared to the other. In addition, the thin, upper cam follower of the primary scanner 28 is in relation to the first cam follower. disc 26 higher than the thick, upper cam follower secondary scanner 29, and the thick, lower cam follower of the primary scanner 28 with respect to the first cam 26 deeper than the thin, lower cam follower secondary scanner 29th

The narrower, deeper third curve 39 has a continuous side wall and its course intersects that of the wider, flatter first curve 30, the side wall of which is thus interrupted in the overlap region. This applies analogously in the second cam 27 for the narrower, deeper fourth curve 40 and the wider, flatter second curve 31. The narrower, deeper curves 39, 40 serve to guide the respective scanners 28, 29 continuously, whereas the wider, flatter curves 30, 31 serve to additionally support the respective scanners 28, 29 when they are displaced into the radially outward position in which they must apply the contact force of the respective closed fixed contacts 14, 15, 20, 21.

When the first cam 26 is rotated counterclockwise by turning the selector shaft to a first end position shown in FIG. 5, 6, 7 is rotated, then the secondary scanner 29 is at its thinner, lower cam from the third curve 39 radially away from the drive shaft 25 and radially moved to the secondary pivot axis 22 until it radially outside end of the third curve 39 has reached. As a result, the secondary moving contacts 20, 21 are pressed against the secondary diverter contact 18 and secondary fixed contact 19, analogously to the first embodiment. This movement of the secondary scanner 29 is assisted, at least in a final phase, by the associated second curve 31 in the synchronously co-rotated second cam 27 and the corresponding thicker, upper cam follower, so that the secondary scanner 29, if the mentioned end of the third Curve 39 has reached, with its two cam rollers on the cams 26, 27 can be supported. When the second cam 27 by turning the stem counterclockwise to a second end position, which in FIG. 5, 6, 7 is rotated, then the primary scanner 28 is moved at its thinner, upper cam follower radially away from the fourth cam 40 toward the drive axis 25 and radially away from the primary pivot axis 17 until it reaches the radial inside end of the fourth curve 40 has reached. As a result, analogous to the first embodiment, the primary moving contacts 15, 16 lifted off the secondary Ableitkontakt 18 and secondary fixed contact 19. This movement of the primary pickup 28 is assisted, at least in a final phase, by the associated first cam 30 in the synchronously co-rotated first cam 26 and the corresponding thicker, lower cam follower, so that the primary pickup 28, when the end mentioned the fourth curve 40 has reached, with its two cam rollers on the cam plates 26, 27 can be supported.

When the first cam 26 by turning the switching shaft in a clockwise direction in a second end position, which is not shown, but analogous to the second end position of the second cam plate 27 in FIG. 5, 6, 6 is rotated, the secondary scanner 29 on its thinner, lower cam follower is moved radially away from the third cam 39 toward the drive axle 25 and radially away from the secondary cam axle 22 until radially inward lying end of the third curve 39 has reached. As a result, analogous to the first embodiment, the secondary moving contacts 20, 21 are lifted from the secondary diverter contact 18 and secondary fixed contact 19. This movement of the secondary sampler 29 is assisted, at least in a final phase, by the associated second cam 31 in the synchronously co-rotated second cam 27 and the corresponding thicker, upper cam follower, so that the secondary cam 29, if the mentioned end of the third Curve 39 has reached, can be supported with its two cam followers on the cam discs 26, 27.

If the second cam 27 by turning the switching shaft in a clockwise direction in a first end position, which is not shown, but analogous to the first end position of the first cam 26 in FIG. 5, 6, 7 is rotated, the primary scanner 28 on its thinner, upper cam follower is moved away from the fourth cam 40 radially away from the drive axle 25 and radially toward the primary cam 17, until it reaches the first cam radially outward end of the fourth curve 40 has reached. As a result, analogously to the first embodiment, the primary moving contacts 15, 16 are pressed against the primary discharge contact 13 and primary fixed contact 14. This movement of the primary scanner 28 is assisted, at least in a final phase, by the associated first curve 30 in the synchronously co-rotated first cam 26 and the corresponding thicker, lower cam follower, so that the primary scanner 28, when the mentioned end of the fourth curve 40 has reached, with its two cam rollers on the cams 26, 27 can be supported.

The curves 39, 40 in the identical cams 26, 27 are formed and offset from each other about the drive axis 25, that the third curve 39 in the first end position and at the same time the fourth curve 40 in the second disfigurement, as shown in FIG. 5, 6, 6 that the third curve 39 is in the second end position and at the same time the fourth curve 40 in the first end position, and that in a transition phase between the two end positions, the angle of rotation about the drive axis 25 of approximately 70 °, both the primary moving contacts 15, 16 and the secondary moving contacts 19, 20 in the second end position, ie open, are.

In this embodiment, the permanent main switch 10 comprises an electrically conductive connection support 41, two electrically conductive primary connection plates 42 (in FIG. 5, the upper connection plate 42 is not shown) and two electrically conductive secondary connection plates 43 (in FIG the upper connecting plate 43 is not shown). The connecting support 41 is located between the Ableitkontakten 13, 18. The primary connecting plates 42 are electrically conductively fixed at the top and bottom of the primary Ableitkontakt 13 and the connecting support 41. The secondary connecting plates 43 are electrically conductively fixed at the top and bottom to the secondary discharge contact 18 and the connecting support 41.

In this embodiment, the Ableitkontakte 13, 18 are not attached to the bearing plate 12, but as just described on the connecting plates 42, 43.

The primary pivot axis 17 is fixed to the top and bottom of the primary connecting plates 42. The secondary pivot axis 22 is fixed to the top and bottom of the secondary connecting plates 43.

In FIG. 8, a second embodiment of a three-phase diverter switch 1 1 is shown schematically in a partial section. This second embodiment is similar to the first embodiment, so that below all the differences are explained in more detail below.

In this embodiment, the diverter switch 1 1 instead of the circuit breaker 10 for each phase U, V, W comprises a permanent main switch 10U, 10V, 10W according to the second embodiment, the circular symmetry about 120 ° offset from the drive axis 25 are arranged. The three connecting posts 37 each lie between two adjacent permanent main switches 10. At each connecting column 37, the respective primary connecting plates 42 and secondary connecting plates 43 of their associated adjacent permanent main switch 10 are electrically and electrically fixed at the top and bottom. In this case, the respective primary connecting plates 42 and secondary connecting plates 43 do not touch each other. If necessary, at least one of the electrically conductive connection supports 37 can be replaced by an electrically insulating connection support 37, so that the respective primary connection plates 42 and secondary connection plates 43 are assigned to it adjacent permanent main switch 10 are no longer electrically connected.

REFERENCE NUMBERS

10 switches, permanent main switch, disconnector

1 1 diverter switch

12 bearing plate

13 primary leakage contact

14 primary fixed contact

15 first primary moving contact

16 second primary moving contact

17 primary swivel axis

18 secondary discharge contact

19 secondary fixed contact

20 first secondary moving contact

21 second secondary moving contact

22 secondary swivel axis

23 coupling mechanisms

231/232 first / second leg of 23

233/234/235 first / second / third coupling axis of 23

24 drive mechanism

25 drive axle

26 first cam

27 second cam

28 primary scanner

29 secondary scanner

30 first curve in 26th

31 second curve in 27

32 guide contours in 12

33 connecting plates

34 contact blades of 15, 16, 20, 21

35 contact holder of 15, 16, 20, 21

36 guide pins

37 connecting posts from 1 1

38 tube holder

39 third turn in 26

40 fourth turn in 27

41 Connecting support of 10 Primary connection plates Secondary connection plates Phases of a three-phase system

Claims

1 . Switch (10) for a switching device (1 1), in particular permanent main switch (10) or disconnector (10) for a diverter switch (1 1) of an on-load tap-changer, comprising

a primary leakage contact (13);

a primary fixed contact (14);

a first primary moving contact (15) and a second primary moving contact (16) which are movable together relative to the primary diverter contact (13) and the primary fixed contact (14) so as to have a first end position in which they abut the primary diverter contact (13) and the primary stationary contact (14), and may occupy a second end position where they are separated from the primary diverter contact (13) and the primary fixed contact (14);

in which

lie in the first end position of the primary Ableitkontakt (13) and the primary fixed contact (14) between the primary Bewegkontakten (15, 16).

2. Switch (10) according to the preceding claim, wherein

lie in the second end position of the primary Ableitkontakt and the primary fixed contact between the primary Bewegkontakten.

3. Switch (10) according to one of the preceding claims, wherein

the first primary moving contact is pivotally mounted about a primary pivot axis (17); and or

the second primary moving contact is pivotally mounted about the primary pivot axis or about another primary pivot axis.

4. Switch (10) according to one of the preceding claims, wherein

the primary moving contacts are coupled in such a way that a movement of a primary moving contact is transmitted to the other primary moving contact;

5. Switch (10) according to one of the preceding claims, comprising

a coupling mechanism (23) coupled to the primary moving contacts and configured to move a primary moving contact transmits the other primary moving contact;

in which

the coupling mechanism

A first leg (231) which is pivotally coupled about a first coupling axis (233) to the first primary moving contact, and

A second leg (232) which is connected about a second coupling axis (234)

pivotally coupled to the second primary moving contact and pivotally coupled to the first leg about a third coupling axis (235); the primary moving contacts are pivotally mounted about a primary pivot axis (17);

the primary pivot axis is parallel and spaced from the coupling axes; each coupling axis is at a distance from the other coupling axes.

6. switch (10) according to one of the preceding claims, comprising

a drive mechanism (24) coupled to the primary moving contacts and configured to move to the first or second end position;

in which

the drive mechanism comprises a cam gear, the

• has a first curve (30) and

• A first cam (26) in which the first curve (30) is formed and which is pivotally mounted about a drive axis (25), and

A primary scanner (28) coupled to at least one of the primary moving contacts and guided in the first curve.

7. Switch (10) according to one of the preceding claims, wherein

the drive mechanism is coupled to the coupling mechanism;

the drive axis is parallel to the primary pivot axis;

the primary pivot axis relative to the primary shunt contact and the primary

Fixed contact is stationary;

the primary scanner is slidably mounted radially to the primary pivot axis and is rotatably coupled to the first leg and / or the second leg about the third coupling axis.

8. switch (10) according to one of the preceding claims, comprising

a secondary leakage contact (18);

a secondary fixed contact (19); a first secondary moving contact (20) and a second secondary moving contact (21), which are movable in common relative to the secondary Ableitkontakt and the secondary fixed contact such that they have a first end position in which they at the secondary Ableitkontakt and abut the secondary fixed contact, and a second end position in which they are separated from the secondary Ableitkontakt and the secondary fixed contact, can take;

in which

in the first end position of the secondary Ableitkontakt and the secondary fixed contact between the secondary Bewegkontakten lie;

the drive mechanism is coupled to the secondary moving contacts and adapted to move them to the first or second end positions; the cam gear

A secondary sampler (29) coupled to at least one of the secondary moving contacts.

9. switch (10) according to the preceding claim, wherein

the cam gear

• has a second curve (31) and

• a second cam (27) in which the second cam (31) is formed and which is pivotally mounted about the drive axis comprises; the secondary scanner is guided in the second curve;

the cams are arranged parallel and at a distance from each other;

the pickups lie between the cams.

10. Switch (10) according to one of the preceding claims, wherein

the cam gear

• a third curve (39) in which the secondary scanner is guided and which is formed in the first cam; and or

• Has a fourth curve (40), in which the primary scanner is guided and which is formed in the second cam.

1 1. Switch (10) according to the previous claim, wherein

in at least one of the cams, one of the curves is narrower and deeper than the other curve.

12. switch (10) according to one of the preceding claims, comprising

an electrically conductive connecting plate (33) which is electrically conductive on the primary mär-Ableitkontakt and the secondary Ableitkontakt is attached.

13. Switch (10) according to one of the preceding claims, comprising

an electrically conductive connection support (41) which is located between the primary Ableitkontakt and the secondary Ableitkontakt;

an electrically conductive primary connection plate (42), which is electrically conductively attached to the primary Ableitkontakt and the connection support;

an electrically conductive secondary connection plate (43), which is electrically conductively attached to the secondary Ableitkontakt and the connection support.

14. diverter switch (1 1) for an on-load tap-changer, comprising

at least one permanent main switch (10) comprising at least one switch (10) formed according to one of the preceding claims; and / or at least one circuit breaker (10) comprising at least one switch (10) formed according to one of the preceding claims.