EP3547341B1 - Control system for a switch and a substation comprising such a control system - Google Patents
Control system for a switch and a substation comprising such a control system Download PDFInfo
- Publication number
- EP3547341B1 EP3547341B1 EP18290025.8A EP18290025A EP3547341B1 EP 3547341 B1 EP3547341 B1 EP 3547341B1 EP 18290025 A EP18290025 A EP 18290025A EP 3547341 B1 EP3547341 B1 EP 3547341B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- arm
- control system
- control
- connecting arm
- sliding element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000006073 displacement reaction Methods 0.000 claims description 15
- 230000001739 rebound effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/42—Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/42—Driving mechanisms
Definitions
- the invention relates on the high voltage circuit breakers and the control systems used for opening and closing such circuit breakers.
- opening and closing of a circuit breaker is achieved by use of a control system in conjunction with a drive motor.
- Such a control system commonly comprises:
- Such a configuration does not provide a reliable connection between the drive system and the circuit breaker. Since the ratio in displacement between the control arm and the at least one connecting arm is constant, it is not possible to vary this in order to optimize the opening and the closing of the circuit breaker. Furthermore, with such a configuration, there is always a rebound effect on closing of the circuit breaker which disturbs the closing operation thereof.
- the document WO 2014/198290 proposes to use a rotational cam and a casing for connecting the drive system to the circuit breaker.
- a rotational cam and a casing for connecting the drive system to the circuit breaker.
- the document JP 2010 135201 A proposes a control system according to the preamble of claim 1.
- the present invention aims to resolve these aforementioned drawbacks. It is an object of the invention to provide a control system that allows a variable ratio of displacement between the control arm and the at least one connecting arm during the closing and the opening operation of the circuit breaker, and in particular, a control system that allows the circuit breaker to be closed at an appropriate speed so as to suppress any rebound effect.
- the invention resides in a control system according to claim 1.
- the kinetics of the closing/opening of the switch is controlled by the angular orientation of the track.
- it is design the track so to optimize the terminal velocity of the closing of the switch in such a way so as to suppress the rebound effect.
- control system is particularly interesting for a T-configuration in which the control arm in mounted for displacement along a first direction and at least the first switch comprises a mobile contact displaceable along the second direction which is perpendicular to the first direction.
- the control system may control both a first switch and a second switch.
- the first end of the first connecting arm may also be connected to the second switch.
- This control system may further comprise a transmission mechanism for connecting the first end of the connecting arm with the first and the second switch.
- the transmission mechanism may comprise at least first and second moving parts configured to move in opposite directions when the first connecting arm is moved along the second direction.
- the first end of the connecting arm may comprise a toothed bar portion, wherein the transmission mechanism comprises for each of the first and second switch:
- the first sliding element comprises a second track.
- the control system further comprises:
- the invention also relates to a high voltage substation comprising:
- Figure 1 shows a control system 1 of the invention configured for connection of a first and a second circuit breaker (not shown) to a drive system (not shown).
- the control system 1 of the invention comprises:
- the control arm 10 is constrained for translation in the first direction 19, having its second end engaged in the first and second tracks 31 and 51.
- the second ends 22, 42 of the first and second connecting arms 20, 40 are arranged to move integrally with the first and the second sliding elements 30, 50 respectively.
- the control arm 10 is fork-shaped, with a central rod 13 comprising the first end 11 of the control arm 10 and three parallel legs 14A, 14B, 14C extending from the central rod 13 and comprising the second end of the control arm 10.
- the central rod 13 and the three legs 14A, 14B, 14C extend in the first direction 19.
- the three legs 14A, 14B, 14C of the control arm 10 are aligned in a first transverse direction perpendicular to the first direction 19, and each leg includes a hole 15 at the second end 12 of the control arm 10.
- the holes 15 in the three legs 14A, 14B, 14C are aligned along a second transverse direction perpendicular to the first transverse direction and are configured to accommodate an axle 16.
- the axle 16 includes first and second rollers 17A engaged in the first and the second tracks 31 and 51 respectively.
- the first and second rollers 17A are arranged between the first and the second legs 14A, 14B and the second and the third legs 14B, 14C of the three legs of the control arm 10.
- the first and second sliding elements 30, 50 have a planar parallelepiped rectangle form, the planar faces being parallel to a plane comprising the first and the second directions 19 and 29.
- the first and second sliding elements 30, 50 further include rollers 32 on two sides thereof that are parallel to the second direction 29.
- the first and second sliding elements 30, 50 also comprise first and second openings that form the first and the second tracks 31, 51 of the first and second sliding elements 30, 50 respectively.
- the first and second tracks 31, 51 extend along the planar faces of the first and second sliding elements 30, 50 and comprise three successive sections, each oriented at a different angle 31A, 31B, 31C between the first and second directions 19 and 29. More precisely, in an open configuration illustrated in Figure 1 , the orientation angles of the three sections 31A, 31B, 31C are selected according to the desired kinematics of the opening and closing of the first and second circuit breaker.
- the first and second tracks may be provided on a removeable part of the first and second sliding elements 30, 50 so as to facilitate adjustment of the opening and closing kinematics of the first and second circuit breakers by replacement of the removeable parts of the first and second sliding elements with tracks that are configured according to a new kinematic.
- the first and second sliding elements 30, 50 are arranged inside a housing 60 comprising a hollow chamber with two pairs of rails 61A, 61B and 61C, 61D respectively that extend along the second direction 29.
- Each pair of rails 61A, 61B and 61C, 61D form first and second guides for movement of the first and the second sliding elements 30, 50 parallel to each other.
- the rollers 32, 52 of each of the first and second sliding elements 30, 50 engage with the rails 61A, 61B and 61C, 61D of the first and second guides respectively. This engagement constrains movement of the first and second sliding elements 30, 50 in the second direction 20.
- the first and second connecting arms 20, 40 are arranged to move integrally with the first and second sliding elements 30, 50 respectively. In this way, the movement of first and second connecting arms 20, 40 is also constrained in the second direction 29.
- control arm 10 moves in the first direction 19 from an open position to a closed position as illustrated on figures 1 and 2 :
- FIGS 3 and 4 illustrate a control system not part of the invention. This control system differs from the above described control system in that it comprises a single sliding element 30 only.
- control system 1 comprises:
- the second end 21 of the first connecting arm 20 is configured to engage in the first track 31 and is constrained for movement in the second direction only.
- the second end 12 of the control arm 10 is arranged for integral movement with the sliding element 30.
- the control arm 10 comprise a central rod 13 with a two-legged fork provided at either end 11, 12 thereof.
- the legs of each fork at each end of the control arm 10 extend parallel to each other along a plane comprising the first and second directions 19, 29.
- Each leg of the forks comprises a through hole that is aligned with the hole in the other leg at the same end 11, 12, of the control arm 10 in the plane defined by the fork.
- the first end 11 of the control arm 10 is connected by the means of an axle passing through the holes, to a rotating arm 71 of a drive system 70.
- the first end 11 of the control arm 10 is connected to the drive system 70 by the axle 16 and the rotating arm 71.
- the second end 12 of the control arm 10 is connected, by the means of an axle passing through the holes in the legs of the fork, to the first sliding element 30.
- the first sliding element 30 of this control system has a planar parallelepiped rectangle form, the planar faces being parallel to a plane comprising the first and second directions.
- the first sliding element 30 includes rollers 32 on two sides thereof that are parallel to the first direction 19.
- the first sliding element 30 further includes a first opening that forms the first track 31 of the first sliding element 30.
- the control system 1 also comprises two parallel rails 61A, 61B extending in the first direction 19, the rails 61A, 61B forming a guide for the first sliding element 30.
- the rollers 32 of the first sliding element 30 engage with the rails 61A, 61B so that the first sliding element 30, is constrained for movement in the first direction 19 only.
- the first connecting arm 20 has a longitudinal form and comprises a toothed bar portion 25 at the first end 21 and a two-legged fork at the second end 22 thereof.
- the legs of the fork of the second end 22 extend parallel to each other along a plane comprising the second direction 29, perpendicular to the first direction 19.
- Each fork leg comprises a through hole 23 aligned with the through hole 23 of the other leg of said two-legged fork along a line comprising the plane defined by the two-legged fork. These holes 23 accommodate an axle 24.
- the axle 24 includes a roller, not shown, that engages with the first track 31 of the first sliding element 30, the roller being arranged between the legs of the fork of the first connecting arm 20.
- the first connecting arm 20 is constrained for movement in the second direction 29 by the means of two guiding sleeves 65A, 65B, a first one of which is provided between the first sliding element 30 and the toothed bar portion 25, a second one of which is provided along a portion of the first end 21 of the first connecting arm 20 which is above the toothed bar portion. 25.
- This control system further comprises:
- the first end 21 of the first connecting arm 20 is connected to the first and second circuit breakers by the means of the first and second toothed gears 67A, 67B and the first and second toothed bars 66A, 66B.
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Description
- The invention relates on the high voltage circuit breakers and the control systems used for opening and closing such circuit breakers.
- Usually, in a high voltage substation, opening and closing of a circuit breaker is achieved by use of a control system in conjunction with a drive motor.
- Such a control system commonly comprises:
- a control arm mounted for displacement between a first and a second position in a first direction, the control arm comprising a first end configured to be connected to a drive system, such as a spring mechanism, and a second end opposite the first end,
- at least one connecting arm mounted for displacement in a second direction that traverses the first direction, the at least one connecting arm comprising a first end configured to be connected to the circuit breaker and a second end opposite to the first end,
- connecting rods configured to connect the second end of the control arm with the first end of the at least one connecting arm in such a way to transfer the movement of the control arm to the at least one connecting arm.
- Such a configuration does not provide a reliable connection between the drive system and the circuit breaker. Since the ratio in displacement between the control arm and the at least one connecting arm is constant, it is not possible to vary this in order to optimize the opening and the closing of the circuit breaker. Furthermore, with such a configuration, there is always a rebound effect on closing of the circuit breaker which disturbs the closing operation thereof.
- To solve these such issues, the document
WO 2014/198290 proposes to use a rotational cam and a casing for connecting the drive system to the circuit breaker. With such configuration, it is possible to adapt the shape of the rotational cam to provide a variable ratio of displacement between the control arm and the connecting arm during opening and closing operation of the circuit breaker. However, with such rotational cam, it is difficult to obtain a high closing speed of the circuit and the rebound effect still arises. - The document
JP 2010 135201 A claim 1. - The present invention aims to resolve these aforementioned drawbacks. It is an object of the invention to provide a control system that allows a variable ratio of displacement between the control arm and the at least one connecting arm during the closing and the opening operation of the circuit breaker, and in particular, a control system that allows the circuit breaker to be closed at an appropriate speed so as to suppress any rebound effect.
- In a first aspect, the invention resides in a control system according to
claim 1. - With such control system, the kinetics of the closing/opening of the switch is controlled by the angular orientation of the track. Hence, it is design the track so to optimize the terminal velocity of the closing of the switch in such a way so as to suppress the rebound effect.
- Furthermore, such a control system is particularly interesting for a T-configuration in which the control arm in mounted for displacement along a first direction and at least the first switch comprises a mobile contact displaceable along the second direction which is perpendicular to the first direction.
- The control system may control both a first switch and a second switch.
- With such a configuration, it is possible to control the opening of two different switches with adapted opening and closing kinetics for each.
- In a particular control system not part of the present invention, where the control system is arranged for the control of two switches, the first end of the first connecting arm may also be connected to the second switch.
- This control system may further comprise a transmission mechanism for connecting the first end of the connecting arm with the first and the second switch. The transmission mechanism may comprise at least first and second moving parts configured to move in opposite directions when the first connecting arm is moved along the second direction.
- The first end of the connecting arm may comprise a toothed bar portion,
wherein the transmission mechanism comprises for each of the first and second switch: - a toothed gear configured to engage with the toothed bar portion,
- a toothed bar configured to engage with the toothed gear and to be connected to the respective switch.
- With such configuration, it is not necessary to provide two connecting arms for the opening and the closing of the first and second switches. This is particularly beneficial when the drive system and the switches are distant from one another.
- In an alternative control system not part of the present invention, for controlling first and second switches, the first sliding element comprises a second track. In this example, the control system further comprises:
- a second connecting arm mounted for displacement in the opposite direction to that of the first connecting arm, the second connecting arm comprising a first end configured for connection to the second switch and a second end opposite the first end,
- With such configuration, it is possible to open and close the first and second switch with the exact same kinetics.
- The invention also relates to a high voltage substation comprising:
- a control system of the present invention as described above, and
- a switch connected to the first end of the first connecting arm.
- Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings in which:
-
Figure 1 shows a perspective view of a control system of the present invention, the control system being configured for the opening of a first and a second circuit breaker, -
Figure 2 shows a perspective view of the control system of the present invention in which a housing thereof has been removed to show first and second sliding elements, -
Figure 3 shows a partial perspective view of a control system not part of the present invention comprising a single sliding element, with only a partial view of a connecting arm being shown, -
Figure 4 shows a partial front view of a control system not part of the invention showing a first end of a connecting arm configured for connection to the first and second circuit breakers. - In the different drawings, the same numerical references are used to denote the same or similar components to facilitate understanding of the invention.
-
Figure 1 shows acontrol system 1 of the invention configured for connection of a first and a second circuit breaker (not shown) to a drive system (not shown). - The
control system 1 of the invention comprises: - a
housing 60, - - a
control arm 10 configured for movement in afirst direction 19 between a first and second position, thecontrol arm 10 comprising afirst end 11 connected to the drive system and asecond end 12 opposite thefirst end 11, - - a first connecting
arm 20 configured for movement in asecond direction 29 traversing thefirst direction 19, the first connectingarm 20 comprising afirst end 21 connected to the first circuit breaker and asecond end 22 opposite thefirst end 21, - - a second connecting
arm 40 configured for movement in thesecond direction 29, the second connectingarm 40 comprising afirst end 41 connected to the second circuit breaker and asecond end 42 opposite thefirst end 41, - - a first sliding
element 30 comprising afirst track 31 and being configured to move in thefirst direction 19, - - a second sliding
element 50 comprising asecond track 51, the secondsliding element 50 configured to move in thefirst direction 19. - The
control arm 10 is constrained for translation in thefirst direction 19, having its second end engaged in the first andsecond tracks arms sliding elements - The
control arm 10 is fork-shaped, with acentral rod 13 comprising thefirst end 11 of thecontrol arm 10 and threeparallel legs central rod 13 and comprising the second end of thecontrol arm 10. Thecentral rod 13 and the threelegs first direction 19. - The three
legs control arm 10 are aligned in a first transverse direction perpendicular to thefirst direction 19, and each leg includes ahole 15 at thesecond end 12 of thecontrol arm 10. Theholes 15 in the threelegs axle 16. - The
axle 16 includes first andsecond rollers 17A engaged in the first and thesecond tracks second rollers 17A are arranged between the first and thesecond legs third legs control arm 10. - The first and second sliding
elements second directions elements rollers 32 on two sides thereof that are parallel to thesecond direction 29. The first and second slidingelements second tracks elements - The first and
second tracks elements different angle second directions Figure 1 , the orientation angles of the threesections - As shown in
Figure 1 and2 , when thecontrol arm 10 is moved from an open to a closed position, the design of the first andsecond tracks arms 20, 40: - the
first section 31A of thetrack 31 is oriented at an angle of approximately at 45°, and the first and second connectingarms - the
second section 31B of thetrack 31 is oriented at an angle of less than 45°, the first and second connectingarms - the
third section 31C of thetrack 31 is oriented at an angle greater than 45° and the first and second connectingarms - According to the embodiment of the present invention shown in
Figures 1 and2 , the first and second tracks may be provided on a removeable part of the first and second slidingelements - The first and second sliding
elements housing 60 comprising a hollow chamber with two pairs ofrails second direction 29. Each pair ofrails elements - The
rollers elements rails elements second direction 20. - The first and second connecting
arms elements arms second direction 29. - When the
control arm 10 moves in thefirst direction 19 from an open position to a closed position as illustrated onfigures 1 and2 : - the
axle 16 and the first andsecond rollers 17A slide within the first andsecond tracks - the first and second sliding
elements second direction 29, with the speed of the displacement being controlled by the angular orientation of the three sections of the first andsecond tracks - the first and second connecting
arms elements second direction 29, thus closing the first and second circuit breakers. -
Figures 3 and4 illustrate a control system not part of the invention. This control system differs from the above described control system in that it comprises a single slidingelement 30 only. - As shown in
Figure 3 , thecontrol system 1 comprises: - a
control arm 10 arranged for movement in afirst direction 19 between first and second positions, thecontrol arm 10 comprising afirst end 11 connected to adrive system 70 and asecond end 12 opposite thefirst end 11, - - a first connecting
arm 20 arranged for movement in asecond direction 29 perpendicular to thefirst direction 19, the first connectingarm 20 comprising afirst end 21 connected to first and second switches and asecond end 22 opposite thefirst end 21, - - a first sliding
element 30 comprising afirst track 31, the first sliding element arranged for movement in thefirst direction 19. - The
second end 21 of the first connectingarm 20 is configured to engage in thefirst track 31 and is constrained for movement in the second direction only. Thesecond end 12 of thecontrol arm 10 is arranged for integral movement with the slidingelement 30. - The
control arm 10 comprise acentral rod 13 with a two-legged fork provided at eitherend control arm 10 extend parallel to each other along a plane comprising the first andsecond directions same end control arm 10 in the plane defined by the fork. - The
first end 11 of thecontrol arm 10 is connected by the means of an axle passing through the holes, to arotating arm 71 of adrive system 70. Thefirst end 11 of thecontrol arm 10 is connected to thedrive system 70 by theaxle 16 and therotating arm 71. Thesecond end 12 of thecontrol arm 10 is connected, by the means of an axle passing through the holes in the legs of the fork, to the first slidingelement 30. - Since the first sliding
element 30 is arranged for movement in thefirst direction 19 only, with the connection of thecontrol arm 10 to the slidingelement 30 and to therotating arm 71, rotation of therotating arm 71 leads to a displacement of thecontrol arm 10 in thefirst direction 19. Hence, movement of thecontrol arm 10 is integral with movement of the first slidingelement 30 in thefirst direction 19. - Similarly to the previously described embodiment of the present invention, the first sliding
element 30 of this control system has a planar parallelepiped rectangle form, the planar faces being parallel to a plane comprising the first and second directions. The first slidingelement 30 includesrollers 32 on two sides thereof that are parallel to thefirst direction 19. The first slidingelement 30 further includes a first opening that forms thefirst track 31 of the first slidingelement 30. - The
control system 1 also comprises twoparallel rails first direction 19, therails element 30. - The
rollers 32 of the first slidingelement 30 engage with therails element 30, is constrained for movement in thefirst direction 19 only. - As illustrated in
Figure 4 , the first connectingarm 20 has a longitudinal form and comprises atoothed bar portion 25 at thefirst end 21 and a two-legged fork at thesecond end 22 thereof. - The legs of the fork of the
second end 22 extend parallel to each other along a plane comprising thesecond direction 29, perpendicular to thefirst direction 19. Each fork leg comprises a throughhole 23 aligned with the throughhole 23 of the other leg of said two-legged fork along a line comprising the plane defined by the two-legged fork. Theseholes 23 accommodate anaxle 24. - The
axle 24 includes a roller, not shown, that engages with thefirst track 31 of the first slidingelement 30, the roller being arranged between the legs of the fork of the first connectingarm 20. - The first connecting
arm 20 is constrained for movement in thesecond direction 29 by the means of two guidingsleeves element 30 and thetoothed bar portion 25, a second one of which is provided along a portion of thefirst end 21 of the first connectingarm 20 which is above the toothed bar portion. 25. - This control system further comprises:
- first and second toothed gears 67A, 67B configured to engage with the
toothed bar portion 25, - - first and second
toothed bars - With such a configuration, the
first end 21 of the first connectingarm 20 is connected to the first and second circuit breakers by the means of the first and second toothed gears 67A, 67B and the first and secondtoothed bars control arm 10 is displaced from the opening position, as illustrated inFigures 3 and4 , to the closed position by rotation of the rotating arm 71: - the
control arm 10 is displaced along thefirst direction 19, - the first sliding
element 30 is displaced along thefirst direction 19 with the control arm because of the constraint in movement, - the first connecting
arm 20 is displaced by the engagement of theaxle 24 in thefirst track 31 as it is constrained for movement along thesecond direction 29, with the velocity of the displacement being controlled by the angular orientation or gradient of thefirst track 31, - the translation of the first connecting
arm 20 causes rotation of the first and second toothed gears 67A, 67B, which in turn results in translation of the first and secondtoothed bars
Claims (2)
- A control system (1) for controlling the opening and closing of at least a first switch and a second switch, the control system (1) comprising:
a control arm (10) mounted for displacement between a first and a second position in a first direction (19), the control arm (10) comprising a first end (11) configured to be connected to a drive system and a second end (12) opposite the first end (11),- a first connecting arm (20) mounted for displacement along a second direction (29) that traverses the first direction (19), the first connecting arm (20) comprising a first end (21) for connection to the first switch and a second end (22) opposite to the first end,- at least a first sliding element (30) comprising a first track (31)- a second connecting arm (40) mounted for displacement in the second direction (29), the second connecting arm (40) comprising a first end (41) configured for connection to the second switch and a second end (42) opposite the first end (41),- a second sliding element (50) comprising a second track (51)characterized in that- the first sliding element (30) is mounted for displacement in the second direction (29),wherein the second end of the control arm is configured to engage with the first track and is constrained for movement in the first direction (19); and
wherein the second end (22) of the first connecting arm (20) is arranged to move integrally with the first sliding element (30),- the second sliding element (50) is mounted for displacement in the second direction (29),- wherein the second end (12) of the control arm (10) is configured to engage with the second track (51) and is constrained for movement in the first direction (19); andwherein the second end (42) of the second connecting arm (40) is arranged to move integrally with the second sliding element (50). - A high voltage substation comprising:a control system (1) according to claim 1,at least one switch, the switch being connected to the first end (21) of the first connecting arm (20),a drive system, the drive system being connected to the first end (11) of the control arm (10).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18290025.8A EP3547341B1 (en) | 2018-03-28 | 2018-03-28 | Control system for a switch and a substation comprising such a control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18290025.8A EP3547341B1 (en) | 2018-03-28 | 2018-03-28 | Control system for a switch and a substation comprising such a control system |
Publications (2)
Publication Number | Publication Date |
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EP3547341A1 EP3547341A1 (en) | 2019-10-02 |
EP3547341B1 true EP3547341B1 (en) | 2021-05-05 |
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ID=62002091
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP18290025.8A Active EP3547341B1 (en) | 2018-03-28 | 2018-03-28 | Control system for a switch and a substation comprising such a control system |
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Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3590186A (en) * | 1968-12-19 | 1971-06-29 | Allis Chalmers Mfg Co | Vacuum interrupter having series connected resistor and shunting means for the latter |
JP5078858B2 (en) * | 2008-12-05 | 2012-11-21 | 中国電力株式会社 | Three-phase collective circuit breaker |
WO2013159819A1 (en) * | 2012-04-26 | 2013-10-31 | Abb Technology Ag | Driving device for a current switching device |
KR101786519B1 (en) * | 2013-01-08 | 2017-10-18 | 엘에스산전 주식회사 | Gas insulated circuit breaker |
WO2014198290A1 (en) | 2013-06-10 | 2014-12-18 | Abb Technology Ag | High-voltage switching device |
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2018
- 2018-03-28 EP EP18290025.8A patent/EP3547341B1/en active Active
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