Switch system for a vacuum interrupter and vacuum interrupter system

Abstract

The present invention relates to a switch system for a vacuum interrupter, comprising: - an actuator (10); - a switch (20); and - a shunt module (30); wherein the actuator is configured to transition the switch from a first position to a second position; wherein the actuator is configured to transition the switch from the second position to the first position; wherein the switch in transitioning from the first position to the second position is configured to open a vacuum interrupter (40); and wherein the shunt module is configured to apply a retarding force to the switch as the switch transitions from the first position to the second position.

Description

FIELD OF THE INVENTION

[0001] The present invention relates to a switch system for a vacuum interrupter, a vacuum interrupter system, and a low, medium or high voltage switchgear.BACKGROUND OF THE INVENTION

[0002] CN111477492A relates to a load switch three-position mechanism having an opening tripping function. It is described that the load switch three-position mechanism comprises: a shell, wherein a load switch operating shaft is arranged on the shell, and the load switch operating shaft is suitable for reciprocating rotation between a power-on switching-on position and a power-off switching-off position; an energy storage device, wherein the energy storage device is connected with the load switch operating shaft, and when the load switch operating shaft rotates to the power-on closing position, the energy storage device is driven to carry out energy storage operation; and an opening tripping mechanism, wherein the opening tripping mechanism is suitable for carrying out locking and unlocking operation on the load switch operating shaft at the power-on closing position. The energy storage device and the opening tripping mechanism can control the state of the load switch operating shaft at the power-on closing position. Rapid opening tripping of the load switch operating shaft can be realized, the load switch operating shaft is switched from the power-on closing position to the power-off opening position, and then the output of the load switch is controlled to be switched from the load switch closing position to the load switch opening position.

[0003] EP1367616A1 describes that a pressure spring is arranged on the end of the drive rod facing away from the gap forming the switching path.

[0004] CN114203490A relates to a normal-pressure air type ring main unit which comprises a cabinet body, a circuit breaker switch electric transmission part and a circuit breaker switch mechanical transmission part are arranged in the cabinet body, the circuit breaker switch electric transmission part comprises a fixing plate, an energy storage mechanism and a switching-on and switching-off mechanism, and the energy storage mechanism and the switching-on and switching-off mechanism are both arranged on the front face of the fixing plate. It is described that the energy storage mechanism and the opening and closing mechanism are arranged along the surface direction of the front surface of the fixed plate; the circuit breaker switch mechanical transmission part comprises a mounting panel, the mounting panel is provided with an opening and closing transmission mechanism, a grounding transmission mechanism, a transmission shaft and a linkage piece, the transmission shaft serves as a driving part to be rotationally connected to the mounting panel, and the opening and closing transmission mechanism and the grounding transmission mechanism can drive the transmission shaft to rotate through the linkage piece.

[0005] CN111540638A describes an operating system. It is described that the system comprises an opening and closing main shaft, a main shaft crank arm, an opening and closing output crank arm, a first energy storage mechanism and a closing tripping device. It is described that during manual closing, the opening and closing main shaft is driven to drive the main shaft crank arm to rotate along the closing direction to enable the first energy storage mechanism to store energy; because the closing tripping piece is subjected to the first blocking force, the first energy storage mechanism cannot release energy and is kept in an energy storage state, an operator firstly cancels the driving force on the opening and closing main shaft along the closing direction and then cancels the first blocking force, and the first energy storage mechanism instantly releases energy to drive the opening and closing output crank arm to perform closing action; at the moment of closing, if the circuit is conducted and short circuit occurs, an ejector pin mechanism on a fuse drives the opening and closing main shaft to rotate along the opening direction, and since the operator cancels the driving force on the opening and closing main shaft along the closing direction before closing, the ejector pin mechanism can drive the opening and closing main shaft to rotate along the opening direction so as to drive the opening and closing output crank arm to open immediately.

[0006] Gas insulated switchgears (GIS) are subject to sustainability requirements, meaning that the overall product needs to be changed towards incorporating sustainable products. Sulphur hexafluoride (SF6), used as the gases dielectric medium in GIS, is one of the most potent greenhouse gases, and thus it must be replaced by more sustainable alternative, for example dry air. However, this change poses challenges for load break switches (LBS), because the sustainable alternatives to SF6 have lower dielectric strength, which complicates the breaking of the electrical arc during the opening of the LBS.

[0007] One solution breaking the electrical arc during the opening of LBS is the implementation of a shunt vacuum interrupter (SVI), which uses a smaller vacuum interrupter to extinguish the arc during opening of the vacuum interrupter. During closing of the vacuum interrupter, the respective electrical arc making of the switch SVI is not engaged. This is the requirement for two different speeds of LBS. During opening or breaking, the SVI needs enough time to assure that the arc extinction takes place in the SVI and thus, the opening operation must be slow. However, the closing operation needs to be carried out as fast as possible to reduce the duration of electrical arcing. Therefore, LBS with SVI must be actuated so that the opening operation is significantly slower than the closing operation.

[0008] Standard LBS drives designed to release the same energy during closing and opening operations, and modifying such a drive to release significantly higher energy during closing than opening is very complex.

[0009] There is a need to address these issues.SUMMARY OF THE INVENTION

[0010] Therefore, it would be advantageous to have an improved switch system for a vacuum interrupter.

[0011] The invention and its scope of protection is defined by the appended independent claims. Embodiments of the invention are defined by the appended dependent claims.BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Exemplary embodiments will be described in the following with reference to the following drawings: Fig. 1 shows a schematic representation of an exemplar switch system; Fig. 2 shows a schematic representation of an exemplar actuator; Fig. 3 shows a schematic representation of an exemplar actuator; Fig. 4 shows a schematic representation of an exemplar switch system having an actuator as shown in Fig. 2; Fig. 5 shows a schematic representation of an exemplar switch system having an actuator as shown in Fig. 3; Fig. 6 shows a schematic representation of an exemplar shunt module for operation with an actuator as shown in Fig. 3; Fig. 7 shows a schematic representation of an exemplar shunt module for operation with an actuator as shown in Fig. 3; Figs. 8, 9, and 10 show schematic representations of an exemplar shunt module for operation with an actuator as shown in Fig. 3, with Fig. 8 showing a closed position for an associated switch, Fig. 9 showing an open position for an associated switch and Fig. 10 showing a ground position; Figs. 11, 12, and 13 show schematic representations of an exemplar shunt module for operation with an actuator as shown in Fig. 2 or 3, with Fig. 11 showing a closed position for an associated switch, Fig. 12 showing an open position for an associated switch and Fig. 13 showing a ground position; Figs. 14, 15, and 16 show schematic representations of an exemplar shunt module for operation with an actuator as shown in Fig. 2 or 3, with Fig. 14 showing a closed position for an associated switch, Fig. 15 showing an open position for an associated switch and Fig. 16 showing a ground position; Figs. 17, 18, and 19 show schematic representations of an exemplar shunt module for operation with an actuator as shown in Fig. 2 or 3, with Fig. 17 showing a closed position for an associated switch, Fig. 18 showing an open position for an associated switch and Fig. 19 showing a ground position; Figs. 20, 21, and 22 show schematic representations of an exemplar shunt module for operation with an actuator as shown in Fig. 2 or 3, with Fig. 20 showing a closed position for an associated switch, Fig. 21 showing an open position for an associated switch and Fig. 22 showing a ground position; Figs. 23, 24, and 25 show schematic representations of an exemplar shunt module for operation with an actuator as shown in Fig. 2 or 3, with Fig. 23 showing a closed position for an associated switch, Fig. 24 showing an open position for an associated switch and Fig. 25 showing a ground position; and Figs. 26, 27, and 28 show schematic representations of an exemplar shunt module for operation with an actuator as shown in Fig. 2 or 3, with Fig. 26 showing a closed position for an associated switch, Fig. 27 showing an open position for an associated switch and Fig. 28 showing a ground position. DETAILED DESCRIPTION OF EMBODIMENTS

[0013] Figs. 1-28 relate to a switch system for a vacuum interrupter and a vacuum interrupter system, either or both of which can be utilized with a low, medium or high voltage switchgear.

[0014] An exemplar switch system for a vacuum interrupter comprises: an actuator 10; a switch 20; and a shunt module 30.

[0015] The actuator is configured to transition the switch from a first position to a second position. The actuator is configured to transition the switch from the second position to the first position. The switch in transitioning from the first position to the second position is configured to open a vacuum interrupter 40. The shunt module is configured to apply a retarding force to the switch as the switch transitions from the first position to the second position.

[0016] Looking at Fig. 1 a gas insulated tank or compartment of a switch gear is shown. A switch or switching system 20 is inside the compartment and the switch 20 can have an associated one or more vacuum interrupters 40. An actuator 10 sits outside the compartment and at an interface between the actuator and switch, a shunt module 30 can be located.

[0017] Examples of the new shunt module are configured to operate with two different types of actuator, and in effect is consistent with the interface as shown in Fig. 1.

[0018] There are in effect two basic types of interfaces between the switching mechanism or switch 20 and the drive or actuator 10. This interface is out of the gas-insulated tank.

[0019] Fig. 2 shows an example of a first type of actuator 10 that provides a first type of interface that is based on two pins. These pins follow a circular trajectory. One pin drives closing and opening operation and the second one switches between ground and off (opened) positions. The shunt vacuum interrupter or shunt module 30 is attached to the pin, which switches between opened and closed. This pin is labelled as pin 120 in the discussion below.

[0020] Fig. 3 shows an example of a second type of actuator 10 that provides a second type of interface is based on a spline shaft. This shaft has three angular positions - on, off and ground or, in other terms, opened, closed and ground. The shunt vacuum interrupter module or shunt module 30 is placed on or attached to the spline shaft between the wall of the gas-insulated tank and the drive. This spline shaft is labelled as shaft 90 in the discussion below.

[0021] Looking at Fig. 3 it is clear that as the spline shaft rotates, other parts can be made to rotate in a arc about the spline shaft, and a pin can be located to rotate in an arc. Such a pin can also be the pin 120 in the discussion below.

[0022] Fig. 4 shows a schematic representation of an exemplar switch system having an actuator 10 as shown in Fig. 2, where the shunt module 30 sits at the interface between the actuator 10 and the switch 20 that can be associated with one or more vacuum interrupters 40. The shunt module is coupled to the pin 120 of the actuator 10 as discussed above.

[0023] Fig. 5 shows a schematic representation of an exemplar switch system having an actuator 10 as shown in Fig. 3, where the shunt module 30 sits at the interface between the actuator 10 and the switch 20 that can be associated with one or more vacuum interrupters 40. The shunt module 30 can be coupled to the shaft 90 of the actuator 10 as discussed above. However, as discussed above as the shaft 90 rotates a pin 120 can be made to move in an arc, and the shunt module can be coupled to the pin 120.

[0024] According to an example, the shunt module 30 is configured to apply a driving force to the switch 20 as the switch transitions from the second position to the first position.

[0025] Thus a decelerating closing movement of the switch 20 can be provided and also an accelerating opening movement. For example, the opening movement can be approximately 20% slower than the opening movement.

[0026] According to an example, the shunt module 30 comprises a spring 50. The shunt module comprises at least one part 60, 70, 80 configured to move as the switch 20 transitions from the first position to the second position. As the at least one part of the shunt module moves as the switch transitions from the first position to the second position the shunt module is configured such that the spring is compressed.

[0027] According to an example, the at least one part 60, 70, 80 of the shunt module 30 is configured to move as the switch 20 transitions from the second position to the first position. As the at least one part of the shunt module moves as the switch transitions from the second position to the first position the shunt module is configured such that the spring expands.

[0028] According to an example, the at least one part of the shunt module 30 comprises a first arm or lever 60 fixedly connected at one end to a shaft 90 that rotates in a first direction as the actuator 10 transitions the switch 20 from the first position to the second position. A second end of the first arm or lever is rotationally connected to a first end of a second arm or lever 70 at a rotation connection 100. A second end of the second arm or lever is coupled to the shunt module or actuator or switch at a coupling location 110. The spring 50 is located between the rotation connection and the coupling location, and as the shaft rotates in the first direction a distance between the rotation connection and the coupling location is reduced.

[0029] According to an example, as the shaft rotates in a second direction opposite to the first direction as the actuator transitions the switch from the second position to the first position the distance between the rotation connection and the coupling location is increased.

[0030] Figs. 6 and 7 show schematic representations of exemplar shunt modules 30 for operation with an actuator 10 as shown in Fig. 3, that is consistent with this operation. The hole for the spline shaft indicates the location of the shaft 90 of the actuator. The compressing lever is the first arm or lever 60 described above. The spring guiding link is the second arm or lever 70 described above. The compression spring is the spring 50 described above. In both cases the first and second arms or levers are rotationally connected to each other. The rotational fixation is the coupling location 110 as described above, that is a fixed location and could be of the shunt module 30 or actuator 10 or switch 20, as long as it does not move. It could even be a part of the compartment of the switchgear. The second arm or lever has a slot within which the connection between the two arms or levers can slide or within which the coupling location can slide, and the spring 50 is located between these locations and is compressed as the actuator 10 operates to close the switch 20. It is also clear that the first arm or lever 60 could have the slot and the spring 50 could be located along the first arm or lever and also be compressed as the actuator 10 operates to close the switch 20. This compression of the spring 50 provides a retarding or decelerating force.

[0031] Figs. 8, 9, and 10 then show schematic representations of an exemplar shunt module 20 for operation with such an actuator 10, with Fig. 8 showing a closed position for an associated switch, Fig. 9 showing an open position for an associated switch and Fig. 10 showing a ground position.

[0032] Thus, the shunt VI module of shunt module 30 is utilizes a compression spring 50. This spring is being compressed during opening and thus the energy accumulates in the spring and thus the system is slowed down. The opposite scenario is applied during closing when the spring is being released and its energy accelerates the closing operation.

[0033] The spline shaft or shaft 90 of the load break switch or actuator 10 can rotate around 90° for each operation, or other angles. The shunt module's 30 mechanism is designed to be independent of the angle. The system can be configured such that the opened position stays as depictured.

[0034] The compressing lever of SVIM is connected to the drive shaft. The compressing pin is fixed to this lever and serves as an element that compresses the spring during opening or is pushed during closing. The spring guiding link guides the compression spring. The link is fixed by a rotational joint to the drive or switchgear housing. The spring end, which does not move, can rest against the rotational joint or against an edge made on the spring guiding link. The compression spring can be guided in many ways, as shown

[0035] According to an example, the at least one part of the shunt module 30 comprises an arm or lever 80 connected at one end at a rotation connection to a pin 120 that moves through an arc in a first direction as the actuator 10 transitions the switch 20 from the first position to the second position. A second end of the arm or lever is coupled to the shunt module or actuator or switch at a coupling location 130. The spring 50 is located between the rotation connection and the coupling location, and as the pin moves through the arc in the first direction a distance between the rotation connection and the coupling location is reduced.

[0036] According to an example, as the pin moves through an arc in a second direction opposite to the first direction as the actuator transitions the switch from the second position to the first position the distance between the rotation connection and the coupling location is increased.

[0037] Figs. 11, 12, and 13 show schematic representations of an exemplar shunt module 30 for operation with an actuator 10 as shown in Fig. 2 or 3, that is consistent with this operation. Fig. 11 shows a closed position for an associated switch 20, Fig. 12 shows an open position for an associated switch and Fig. 13 shows a ground position. The pin 120 can be the opening / closing pin described with respect to Fig. 2, or could be a pin 120 off centre from the shaft as discussed with respect to Fig. 3. the lever or arm 80 has a slot coupled to a coupling location 130 that is at a fixed position that can be of the actuator, the shunt module or the switch or even of the switchgear compartment, and in moving from closed to pen positions the spring is compressed.

[0038] According to an example, the shunt module 30 comprises a spring 50 connected at one end to a pin 120 that moves through an arc in a first direction as the actuator 10 transitions the switch 20 from the first position to the second position. A second end of the spring is connected to the shunt module or actuator or switch at a fixed location 140, and as the pin moves through the arc in the first direction the spring is put under tension.

[0039] According to an example, as the pin moves through an arc in a second direction opposite to the first direction as the actuator transitions the switch from the second position to the first position the distance between the rotation connection and the spring contracts.

[0040] Figs. 14, 15, and 16 show schematic representations of an exemplar shunt module 30 for operation with an actuator 10 as shown in Fig. 2 or 3, that is consistent with this operation. Fig. 14 shows a closed position for an associated switch 20, Fig. 15 shows an open position for the associated switch 20 and Fig. 16 shows a ground position. The pin 120 can be the opening / closing pin described with respect to Fig. 2, or could be a pin 120 off centre from the shaft as discussed with respect to Fig. 3. The spring 50 is coupled to a coupling location 140 that is at a fixed position that can be of the actuator, the shunt module or the switch or even of the switchgear compartment, and in moving from closed to pen positions the spring is stretched or put under tension.

[0041] According to the invention, the shunt module 30 comprises an air damper 150.

[0042] According to the invention, the air damper comprises a plunger 160 connected at one end to a pin 120 that moves through an arc in a first direction as the actuator 10 transitions the switch 20 from the first position to the second position. The air damper comprises a cylinder 170 within which the plunger can move. The cylinder is connected to the shunt module or actuator or switch at a fixed location 180, and as the pin moves through the arc in the first direction the plunger is configured to move within the cylinder in a first direction to compress a gas within the cylinder.

[0043] According to the invention, the cylinder comprises a one way valve 190 and as the pin moves through an arc in a second direction opposite to the first direction as the actuator transitions the switch from the second position to the first position the plunger is configured to move within the cylinder in a second direction opposite to the first direction. As the plunger moves in the cylinder in the second direction the one way valve is configured to let at least some of the gas to pass through the valve.

[0044] Figs. 17, 18, and 19 show schematic representations of an exemplar shunt module 30 for operation with an actuator 10 as shown in Fig. 2 or 3 consistent with this example. Fig. 17 shows a closed position for an associated switch 20, Fig. 18 shows an open position for the associated switch and Fig. 19 shows a ground position. The pin 120 can be the opening / closing pin described with respect to Fig. 2, or could be a pin 120 off centre from the shaft as discussed with respect to Fig. 3.

[0045] Figs. 20, 21, and 22 show schematic representations of an exemplar shunt module 30 for operation with an actuator 10 as shown in Fig. 2 or 3 consistent with this example. Fig. 20 shows a closed position for an associated switch 20, Fig. 21 shows an open position for the associated switch and Fig. 22 shows a ground position. The pin 120 can be the opening / closing pin described with respect to Fig. 2, or could be a pin 120 off centre from the shaft as discussed with respect to Fig. 3.

[0046] Figs. 23, 24, and 25 show schematic representations of an exemplar shunt module 30 for operation with an actuator 10 as shown in Fig. 2 or 3 consistent with this example. Fig. 23 shows a closed position for an associated switch 20, Fig. 24 shows an open position for the associated switch and Fig. 25 shows a ground position. The pin 120 can be the opening / closing pin described with respect to Fig. 2, or could be a pin 120 off centre from the shaft as discussed with respect to Fig. 3.

[0047] Figs. 26, 27, and 28 show schematic representations of an exemplar shunt module 30 for operation with an actuator 10 as shown in Fig. 2 or 3 consistent with this example. Fig. 26 shows a closed position for an associated switch 20, Fig. 27 shows an open position for the associated switch and Fig. 28 shows a ground position. The pin 120 can be the opening / closing pin described with respect to Fig. 2, or could be a pin 120 off centre from the shaft as discussed with respect to Fig. 3.

[0048] As shown in Figs. 17-19 and 23-25, the cylinder 170 can have a one way valve 190 that lets gas pass through it, such that in moving from the opened to the closed positions there is no retarding force.

[0049] As shown in Figs. 20-22 and 26-28, the plunger 160 that moves in the cylinder 170 can have a one way valve 190 that lets gas pass through it, such that in moving from the opened to the closed positions there is no retarding force.

[0050] In all cases, one end of the plunger is connected to a part of the actuator - pin 120 - that moves through an arc and the cylinder 170 is connected to a fixed location 180.

[0051] An exemplar vacuum interrupter system comprises: an actuator 10; a switch 20; a shunt module 30; and a vacuum interrupter 40.

[0052] The actuator is configured to transition the switch from a first position to a second position. The actuator is configured to transition the switch from the second position to the first position. The switch in transitioning from the first position to the second position is configured to open the vacuum interrupter. The shunt module is configured to apply a retarding force to the switch as the switch transitions from the first position to the second position.

[0053] In an example, the shunt module is configured to apply a driving force to the switch as the switch transitions from the second position to the first position.

[0054] In an example, the shunt module comprises a spring 50. The shunt module comprises at least one part 60, 70, 80 configured to move as the switch transitions from the first position to the second position. As the at least one part of the shunt module moves as the switch transitions from the first position to the second position the shunt module is configured such that the spring is compressed.

[0055] In an example, the at least one part 60, 70, 80 of the shunt module is configured to move as the switch transitions from the second position to the first position. As the at least one part of the shunt module moves as the switch transitions from the second position to the first position the shunt module is configured such that the spring expands.

[0056] In an example, the at least one part of the shunt module comprises a first arm or lever 60 fixedly connected at one end to a shaft 90 that rotates in a first direction as the actuator transitions the switch from the first position to the second position. A second end of a the first arm or lever is rotationally connected to a first end of a second arm or lever 70 at a rotation connection 100. A second end of the second arm or lever is coupled to the shunt module or actuator or switch at a coupling location 110. The spring is located between the rotation connection and the coupling location, and wherein as the shaft rotates in the first direction a distance between the rotation connection and the coupling location is reduced.

[0057] In an example, as the shaft rotates in a second direction opposite to the first direction as the actuator transitions the switch from the second position to the first position the distance between the rotation connection and the coupling location is increased.

[0058] In an example, the at least one part of the shunt module comprises an arm or lever 80 connected at one end at a rotation connection to a pin 120 that moves through an arc in a first direction as the actuator transitions the switch from the first position to the second position. A second end of the arm or lever is coupled to the shunt module or actuator or switch at a coupling location 130. The spring is located between the rotation connection and the coupling location, and as the pin moves through the arc in the first direction a distance between the rotation connection and the coupling location is reduced.

[0059] In an example, as the pin moves through an arc in a second direction opposite to the first direction as the actuator transitions the switch from the second position to the first position the distance between the rotation connection and the coupling location is increased.

[0060] In an example, the shunt module comprises a spring 50 connected at one end to a pin 120 that moves through an arc in a first direction as the actuator transitions the switch from the first position to the second position. A second end of the spring is connected to the shunt module or actuator or switch at a fixed location 140, and as the pin moves through the arc in the first direction the spring is put under tension.

[0061] In an example, as the pin moves through an arc in a second direction opposite to the first direction as the actuator transitions the switch from the second position to the first position the distance between the rotation connection and the spring contracts.

[0062] According to the invention, the shunt module comprises an air damper 150.

[0063] According to the invention, the air damper comprises a plunger 160 connected at one end to a pin 120 that moves through an arc in a first direction as the actuator transitions the switch from the first position to the second position. The air damper comprises a cylinder 170 within which the plunger can move. The cylinder is connected to the shunt module or actuator or switch at a fixed location 180. As the pin moves through the arc in the first direction the plunger is configured to move within the cylinder in a first direction to compress a gas within the cylinder.

[0064] According to the invention, the cylinder comprises a one way valve 190, and as the pin moves through an arc in a second direction opposite to the first direction as the actuator transitions the switch from the second position to the first position the plunger is configured to move within the cylinder in a second direction opposite to the first direction. When the plunger moves in the second direction the one way valve is configured to let at least some of the gas to pass through the valve.

[0065] A low or medium or high voltage switchgear can comprise a switch system as described above and / or can comprise a vacuum interrupter system as described above.

Claims

1. A switch system for a vacuum interrupter, comprising: - an actuator (10); - a switch (20); and - a shunt module (30); wherein the shunt module comprises an air damper (150), wherein the air damper comprises a plunger (160) connected at one end to a pin (120), wherein the air damper comprises a cylinder (170) within which the plunger can move, wherein the cylinder comprises a one way valve (190), wherein the cylinder is connected to the shunt module or actuator or switch at a fixed location (180), wherein the actuator is configured to transition the switch from a first position to a second position; wherein the actuator is configured to transition the switch from the second position to the first position; wherein the switch in transitioning from the first position to the second position is configured to open a vacuum interrupter (40); wherein the actuator is configured to transition the switch from the first position to the second position; wherein the switch in transitioning from the second position to the first position is configured to close the vacuum interrupter (40); as the actuator transitions the switch from the first position to the second position the shunt module is configured to apply a retarding force to the switch, wherein the pin (120) is configured to move through an arc in a first direction, and as the pin moves through the arc in the first direction the plunger is configured to move within the cylinder in a first direction to compress a gas within the cylinder, and the one way valve is configured to be closed; and as the actuator transitions the switch from the second position to the first position the shunt module is configured not to apply a retarding force to the switch, wherein the pin (120) is configured to move through an arc in a second direction opposite to the first direction, and as the pin moves through the arc in the second direction the plunger is configured to move within the cylinder in a second direction opposite to the first direction, and the one way valve is configured to be open to let gas pass through the one way valve.

2. Switch system according to claim 1, wherein the shunt module is configured to apply a driving force to the switch as the switch transitions from the second position to the first position.

3. Switch system according to any of claims 1-2, wherein the shunt module comprises a spring (50), wherein the shunt module comprises at least one part (60, 70, 80) configured to move as the switch transitions from the first position to the second position, and wherein as the at least one part of the shunt module moves as the switch transitions from the first position to the second position the shunt module is configured such that the spring is compressed.

4. Switch system according to claim 3, wherein the at least one part (60, 70, 80) of the shunt module is configured to move as the switch transitions from the second position to the first position, and wherein as the at least one part of the shunt module moves as the switch transitions from the second position to the first position the shunt module is configured such that the spring expands.

5. Switch system according to any of claims 3-4, wherein the at least one part of the shunt module comprises a first arm or lever (60) fixedly connected at one end to a shaft (90) that rotates in a first direction as the actuator transitions the switch from the first position to the second position, wherein a second end of the first arm or lever is rotationally connected to a first end of a second arm or lever (70) at a rotation connection (100), wherein a second end of the second arm or lever is coupled to the shunt module or actuator or switch at a coupling location (110), wherein the spring is located between the rotation connection and the coupling location, and wherein as the shaft rotates in the first direction a distance between the rotation connection and the coupling location is reduced.

6. Switch system according to claim 5, wherein as the shaft rotates in a second direction opposite to the first direction as the actuator transitions the switch from the second position to the first position the distance between the rotation connection and the coupling location is increased.

7. Switch system according to any of claims 3-4, wherein the at least one part of the shunt module comprises an arm or lever (80) connected at one end at a rotation connection to a pin (120) that moves through an arc in a first direction as the actuator transitions the switch from the first position to the second position, wherein a second end of the arm or lever is coupled to the shunt module or actuator or switch at a coupling location (130), wherein the spring is located between the rotation connection and the coupling location, and wherein as the pin moves through the arc in the first direction a distance between the rotation connection and the coupling location is reduced.

8. Switch system according to claim 7, wherein as the pin moves through an arc in a second direction opposite to the first direction as the actuator transitions the switch from the second position to the first position the distance between the rotation connection and the coupling location is increased.

9. Switch system according to any of claims 1-2, wherein the shunt module comprises a spring (50) connected at one end to a pin (120) that moves through an arc in a first direction as the actuator transitions the switch from the first position to the second position, wherein a second end of the spring is connected to the shunt module or actuator or switch at a fixed location (140), and wherein as the pin moves through the arc in the first direction the spring is put under tension.

10. Switch system according to claim 9, wherein as the pin moves through an arc in a second direction opposite to the first direction as the actuator transitions the switch from the second position to the first position the distance between the rotation connection and the spring contracts.

11. A vacuum interrupter system, comprising: - an actuator (10); - a switch (20); - a shunt module (30); and - a vacuum interrupter (40); wherein the shunt module comprises an air damper (150), wherein the air damper comprises a plunger (160) connected at one end to a pin (120), wherein the air damper comprises a cylinder (170) within which the plunger can move, wherein the cylinder comprises a one way valve (190), wherein the cylinder is connected to the shunt module or actuator or switch at a fixed location (180), wherein the actuator is configured to transition the switch from a first position to a second position; wherein the actuator is configured to transition the switch from the second position to the first position; wherein the switch in transitioning from the first position to the second position is configured to open the vacuum interrupter; wherein the actuator is configured to transition the switch from the first position to the second position; wherein the switch in transitioning from the second position to the first position is configured to close the vacuum interrupter (40); as the actuator transitions the switch from the first position to the second position the shunt module is configured to apply a retarding force to the switch, wherein the pin (120) is configured to move through an arc in a first direction, and as the pin moves through the arc in the first direction the plunger is configured to move within the cylinder in a first direction to compress a gas within the cylinder, and the one way valve is configured to be closed; and as the actuator transitions the switch from the second position to the first position the shunt module is configured not to apply a retarding force to the switch, wherein the pin (120) is configured to move through an arc in a second direction opposite to the first direction, and as the pin moves through the arc in the second direction the plunger is configured to move within the cylinder in a second direction opposite to the first direction, and the one way valve is configured to be open to let gas pass through the one way valve.

12. A low or medium or high voltage switchgear comprising a switch system according to any of claims 1-10 and / or a vacuum interrupter system according to claim 11.

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