EP1267374A1 - Elektrisches Schaltgerät mit beweglicher Kontaktbrücke - Google Patents

Elektrisches Schaltgerät mit beweglicher Kontaktbrücke Download PDF

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Publication number
EP1267374A1
EP1267374A1 EP02354070A EP02354070A EP1267374A1 EP 1267374 A1 EP1267374 A1 EP 1267374A1 EP 02354070 A EP02354070 A EP 02354070A EP 02354070 A EP02354070 A EP 02354070A EP 1267374 A1 EP1267374 A1 EP 1267374A1
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EP
European Patent Office
Prior art keywords
contact
rotation
contact member
bridge
connection
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.)
Granted
Application number
EP02354070A
Other languages
English (en)
French (fr)
Other versions
EP1267374B1 (de
Inventor
Francis Schneider Electric Ind. S.A. Chevalier
Sandrine Schneider Electric Ind. S.A. Masson
Denis Schneider Electric Ind. S.A. Milan
Francois Schneider Electric Ind. S.A. Trichon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric Industries SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP1267374A1 publication Critical patent/EP1267374A1/de
Application granted granted Critical
Publication of EP1267374B1 publication Critical patent/EP1267374B1/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H33/121—Load break switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2016—Bridging contacts in which the two contact pairs commutate at substantially different moments
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/14—Air-break switches for high tension without arc-extinguishing or arc-preventing means with bridging contact that is not electrically connected to either line contact in open position of switch

Definitions

  • the invention relates to a high voltage electrical switchgear with bridge contact such as a switch disconnector, a disconnector, a disconnecting switch earth or a switch, with or without breaking capacity, with or without breaking capacity closing.
  • Document US 4,263,487 describes an electric power switch for high voltage with air cutoff, comprising a first connection area connected to a fixed contact member, a second connection pad connected to a movable contact blade pivoting around a fixed geometric axis, and a mechanism blade drive.
  • the free end of the blade forms a permanent contact, and is provided with an arcing contact formed by a rod guided in translation in a direction orthoradial with respect to the axis of rotation of the blade, and returned by a return spring to a partially retracted rest position.
  • connection contact member has a permanent contact cooperating with the free end of the blade and a contact complementary arc formed by a blowing piston, movable inside a chamber blowing, returned to a rest position by a blowing spring, and provided a clamp which cooperates with the rod carried by the blade.
  • the permanent contacts separate first, while the rod remains in taken inside a pliers of the piston, which leads to a simultaneous compression of the return spring for rod and piston blowing spring. The distance between the blade and the connection contact increases, until reaching a point where the clamp suddenly releases the stem.
  • a cut-off disconnector is described under load high voltage, comprising a movable contact bridge connecting two contact members of connection.
  • a drive mechanism translates the movable contact between a closed position and a sectioning position, along an axis of translation perpendicular to the contact bridge. In the sectioning position, a double cut is performed and the contact bridge remains at a floating potential.
  • the isolation distance to respect between the contact bridge and each of the two connection contacts is more small than the insulation distance that would be required between two conductors, each at potential of one of the connection contacts. The size is therefore reduced by compared to a pivoting mobile contact device of the type described above.
  • the pure translational movement of the contact bridge has the consequence that it separates simultaneously from the two connection contacts, generating two arcs electric in series. It is therefore necessary to provide two arcing contact devices allowing the simultaneous extinction of the two arcs.
  • the arcing contacts being parts mobile, the reliability of the device is reduced and the price increased.
  • the mass in motion at the time when the cut takes place that is to say at the time of the separation of arcing contacts, includes the entire mass of the contact bridge and contacts arc, which requires a drive mechanism of high power and energy.
  • Document DE1 690 506 describes a high load cut-off switch voltage, comprising a movable contact bridge connecting two connection pads shaped like clips.
  • One of the clamps is associated with an arc extinguishing chamber to ensure openings under load.
  • the other clamp is sized to ensure a large closing power.
  • a drive mechanism operates the contact bridge of such so that at the opening, the bridge separates successively from the clamp associated with the extinguisher chamber then the clamp with high closing power while on closing, the bridge plugs first into the clamp associated with the extinguishing chamber and then into the clamp with high closing power.
  • the contact bridge is a lever articulated by a central pivot with a movable driving rod in translation.
  • Sequencing is obtained either by ensuring different friction between the clamps and the bridge, either by providing different masses for the two lever arms of the bridge, or again by providing lever arms for different lengths, or again by combining the previous measurements.
  • the mechanism does not allow precise control of the position of the contact bridge during the maneuver.
  • a baase voltage disconnector switch comprising a pair of movable knives cooperating at one end with a bar of a busbar and at the other end with a fixed contact connected to an output conductor, an arc extinguishing chamber being arranged opposite the fixed contact.
  • the pair of movable knives is articulated around a first axis connected by a first set of connecting rods to an operating shaft, a second set of connecting rods being articulated on the shaft and at the end of the bar side knives.
  • the first axis is subject to move parallel to itself along a trajectory comprising a portion of an arc followed by a portion substantially straight.
  • a first rotation of the tree produced through connecting rods a displacement of the axis according to the portion of arc of circle, causing the separation of the pair of mobile knives and the fixed contact.
  • a second consecutive shaft rotation at the first produces a displacement of the axis along the rectilinear portion causing a separation of the pair of knives and the bar.
  • the pair of knives substantially follows a rotation path around the axis of rotation of the shaft maneuver, while only a displacement of the part in contact with the bar would be necessary. This does not allow optimization of the operating energy.
  • the pair of knives remains between the bar and the fixed contact.
  • the shortest current path through the air and through the pair of knives between the bar and the fixed contact hardly increases between the open position obtained at the end of the first phase and the alleged sectioning position obtained at the end of the second phase.
  • the second phase of the movement only improves not the isolation between the bar and the fixed contact.
  • the only effect of the second phase is so isolate the pair of knives.
  • Such a solution which may be of interest in low voltage, cannot be transposed to high voltage.
  • the closing takes place according to the reverse sequence: the pair of knives spindles first in the bar, then the pair knives close the circuit by coming into contact with the fixed contact.
  • the invention therefore aims to remedy the drawbacks of the state of the art, so as to offer low voltage high voltage electrical switchgear size, and requiring only a low energy mechanism for the operation opening and closing. More specifically, it aims to improve performance and to simplify a high voltage electrical switchgear with contact bridge.
  • the contact bridge performs a movement which is essentially a rotation around the second connecting contact member, so that the energy necessary to bring, from a closed position of rest , the first movable contact at a speed given at the instant of separation between the first movable contact and the first connection contact member is less than the energy which would be necessary if it were necessary to simultaneously move the second movable contact.
  • the contact bridge Due to the reversal of the direction of rotation in the second phase of the movement opening, the contact bridge separates from the second connection contact member without getting close to the first one so that overall, the length of the current path passing from one connecting contact member to the other passing through the air and the bridge contact grows continuously.
  • the contact bridge when it reaches the separation position, is separated from the two connecting contact members and is at a floating potential.
  • the disruptive tension that is to say the tension from which an arc is born between the contacts, is approximately twice the breaking voltage corresponding to a movable contact member which would still be electrically connected to the second contact member connection contact. Indeed, there are two arcs which must burst simultaneously to establish a current, between the contact bridge and each of the contact members of connection. It is therefore possible to obtain interesting performances in a reduced volume.
  • the contact bridge is in a double cutting position at the end of second phase, approximately equidistant from the first and second organs of connection contact.
  • the sectioning is obtained between the bridge and the first member of connection contact on the one hand, and between the contact bridge and the second member of connection contact on the other hand.
  • the distance required between the contact bridge and each connection contact member is therefore weaker than that which would be required between a fixed connection contact member and a pivoting movable contact around a fixed axis and remaining at the potential of the second contact member of connection.
  • the contact bridge in the sectioning position can be placed in close proximity to the wall, parallel to it for example, while in the case of a movable contact remaining at potential of one of the phases, it is necessary to respect between the movable contact in position section and the enclosure wall a phase-neutral safety distance.
  • the device is to be placed in the air near another equipment. Overall, a more compact apparatus is obtained.
  • the guide device comprises a connecting rod articulated guide on the second pivot and on a pivot integral with the chassis.
  • Guidance is so extremely simple to make, and inexpensive. It produces both kinematics necessary for the movement in two phases than that necessary for the third phase.
  • the guide device comprises a slide of guide integral with the chassis and in which the second pivot slides.
  • the slide has a first substantially orthoradial ramp relative to an imaginary axis parallel to the axis of rotation of the crank and passing close to the second member of connection contact, and a second ramp which is substantially radial with respect to the axis of crank rotation.
  • Guidance is then more complex from a point of view constructive, but it leaves an additional degree of freedom to the designer to establish a ideal displacement curve of the contact bridge.
  • other guides are possible and in particular guide devices cooperating with a other material point of the contact bridge or one of the connecting rods.
  • the instantaneous center of rotation is not necessarily fixed in each of the phases.
  • the instantaneous center of rotation is located at proximity of the second mobile contact member during the first phase. This allows to have minimal movement between the second movable contact member and the second connection contact member during this phase, since it seeks to preserve the contact between these two organs.
  • the instantaneous center of rotation is found near the first movable contact member during the second phase. This allows quick separation of the second movable contact member from the second member connection contact, and thus rapidly increase the disruptive voltage between the contact bridge and connecting contact members.
  • the separation movement comprises a third phase following the second phase and in which the contact bridge pivots around the instantaneous center of rotation in the second direction of rotation, bringing the contact bridge in contact with a grounding or grounding contact member and bringing the first movable contact member in contact with the first contact member of connection.
  • the first contact body of connection is earthed.
  • the first connection contact member comprises an arcing contact cooperating with an arcing contact of the first contact member mobile.
  • the arcing contacts can be of the blow piston and rod type, described in the US document whose description is integrated here on this point by reference. He is at underline that the invention requires only one pair of arcing contacts, against two for the conventional contact bridge switchgear.
  • At least one of the contact members of connection includes a clamp cooperating in the closed position with a knife the mobile contact member with which it is in contact.
  • the invention relates to high voltage switchgear, in particular switchgear in the air or in a gas with high dielectric strength, but also oil switchgear.
  • high voltage is meant here, according to international normative vocabulary, all voltages above 1000V, which understand both the medium voltage and very high voltage domains tensions.
  • an overhead medium voltage switch-disconnector 10 according to a first embodiment of the invention comprises a first member for connection contact 12, a second connection contact member 14, and a bridge mobile contact 16, driven by a drive mechanism 18.
  • the first connection contact member 12 is fixed to an insulator 20 ensuring its maintenance relative to a sheet of a support frame 22, and is connected to a overhead conductor, in this case to a bar 24 of a set of power bars.
  • the first connection contact member 12 is composed of a clamp 26 and a contact arc formed by a piston 28 of the well known type described for example in the document US 4,263,487.
  • the second connection contact member 14 is a clamp 29, visible in detail in Figure 4, attached to one end of a bushing 30 entering the tank of a medium voltage electric transformer with oil insulation, through the sheet 22.
  • the movable contact bridge 16 is constituted by a rigid metal blade 32 forming a first movable contact member 34 on the side of one of its ends, and a second movable contact member 36 on the side of its opposite end.
  • the first movable contact member 34 is composed of a knife 38 and a spark arrester rod 40, visible in Figures 3 and 4.
  • the second member 36 is a simple knife.
  • the body 32 of the rigid blade provides the electrical connection between the two movable contact members 34, 36 which are always at the same electrical potential.
  • the drive mechanism comprises a motor shaft 42 rotated by a motor mechanism not shown and driving a transmission shaft 44, also said drive shaft, by means of a driving crank 46 keyed onto the shaft motor 42, a driven crank 48 keyed onto the drive shaft 44 and a connecting rod transmission 49 articulated on the two cranks 46, 48.
  • the motor shaft 42 and the shaft 44 are arranged perpendicular to the plane of the figures and are journalled on bearings supported by the chassis 22.
  • the shaft 44 carries a double crank 50.
  • the crank 50 supports a first pivot 52 allowing the articulation of a first connecting rod intermediate 54, and a second pivot 56 allowing the articulation of a second connecting rod intermediate 58.
  • the first connecting rod 54 is also articulated on the contact bridge 16, around a first pivot 60 of bridge 16, located at an intermediate point between the two movable contact members 34, 36, near the first movable contact member 34.
  • the second connecting rod is also articulated on the contact bridge, around a second pivot 62 of deck 16, located at an intermediate point between the first pivot 60 and the second movable contact member 36, close to the latter.
  • the second pivot 62 is guided in a guide slide 64, particularly visible in Figure 4, which has a first ramp 66 inclined in a substantially orthoradial direction relative to a imaginary axis 68 which would be parallel to the axis of rotation 70 of the drive shaft 44 and pass in the immediate vicinity of the second clamp 36, this first ramp 66 is extending by a second ramp 72 substantially radial relative to the axis of rotation of the drive shaft 44.
  • the geometric axes of rotation of the pivots 52, 56, 60, 62 are all parallel to the geometric axis of rotation of the drive shaft 44, so that the movement of the contact bridge 16 is plane, i.e.
  • the angle of the first connecting rod 54 is the angle ⁇ 1 open between a geometric straight line passing through the two pivots 52, 60 of the first connecting rod 54 on the one hand and a straight line passing through the pivot 52 of the first connecting rod on the crank and the axis of rotation of the shaft 44 on the other hand, angle whose apex is located on the pivot 52 of rotation of the first connecting rod relative to the crank.
  • the angle of the second connecting rod is the angle ⁇ 2 open between a geometric straight line passing through the two pivots 56, 62 of the second connecting rod 58 on the one hand and a straight line passing through the pivot 56 of the second connecting rod on the crank 50 and the axis of rotation of the shaft 44 on the other hand, angle whose apex is located on the pivot 56 of rotation of the second connecting rod 58 relative to the crank 50.
  • the apparatus passes from the closed position of FIG. 1 to the transient cut-off position of FIG. 3, passing through the transient position before cut-off in FIG. 2, gradually opening the angle ⁇ 1 of the first connecting rod and the angle ⁇ 2 of the second connecting rod.
  • the angle ⁇ 1 of the first connecting rod remains close to 90 °, so that the rotation of the crank 50 results in a significant displacement of the pivot 60, while the angle ⁇ 2 of the second connecting rod 58 remains weak, which results in a slight displacement of the pivot 62 along the first ramp 66 of the slide 64.
  • the planar movement of the contact bridge 16 breaks down into a rotation in anticlockwise in the figures, around an instantaneous center of rotation located near the second clamp 29 and the second knife 36, and a displacement of the instantaneous axis of rotation such as this remains close to the second clamp 29 and the second knife 36.
  • the second knife 36 therefore remains inserted in the second clamp 29. More specifically, between the position of FIG. 1 and that of FIG. 2, the displacement of the bridge 16 gives place at the separation between the first knife 38 and the first clamp 26. However, the spark arrester 40 remains inserted in the piston 28 and drives the latter. Between the position of FIG. 2 and that of FIG.
  • the spark arrester 40 separates from the piston 28 which returns suddenly to its rest position under the stress of a return spring.
  • the separation of the arcing contacts 28, 40 gives rise to an electric arc which is blown by the retracting piston.
  • the duration of the displacement between the position of FIG. 2 and that of FIG. 3 is preferably greater than one period of the alternating current, ie 20 ms, so that one is assured of at least two zero crossings of the current before the apparatus does not reach the position of FIG. 3.
  • the electric arc is extinguished while the distance between the first contact members 12, 34 increases rapidly and the residual gases of the cut-off are blown by the piston 28. This rapid distance ensures sufficient dielectric strength to avoid any reclacing when the transient recovery voltage increases between the first contact members.
  • the current is definitively interrupted.
  • the shaft 44 continues its rotation towards the sectioning position shown in FIG. 4, movement which constitutes the second phase, known as sectioning. .
  • the angle ⁇ 1 of the first connecting rod 54 continues to increase until it is around 180 ° in the position of FIG. 4, while the angle ⁇ 2 of the second connecting rod 58 reaches then exceeds 90 °, following the sliding of the second pivot 62 in the second ramp 72 of the slide 64.
  • the movement of the second pivot 62 of the bridge is therefore preponderant compared to the movement of the first pivot 60 of the bridge and the contact bridge 16 performs a compound movement comprising a clockwise rotation around an instantaneous center of rotation located near the first pivot.
  • the double sectioning position is reached when the contact bridge 16 is parallel to its closed position, substantially equidistant from the two connecting contact members 12, 14, at a sufficient distance to ensure cutting between the contact bridge 16 - which is at a floating potential - and each of the two connection contact members 12, 14.
  • the closing takes place with a reverse sequence, caused by the rotation of the drive shaft 44 clockwise.
  • the second knife 36 plugs into the second clamp 29, then the first knife 38 and the spark arrester 40 respectively in the first clamp 26 and in the piston 28.
  • the slide 64 makes it possible to reduce the number of degrees of freedom of the transmission constituted by the drive mechanism 18, so as to impose on the contact bridge 16 a complex movement comprising in the first phase a counterclockwise rotation and in the second phase a clockwise rotation.
  • a second embodiment is shown in Figures 4 to 7.
  • the apparatus electrical considered is an earthing switch 100, comprising a first connection clamp 102, a second connection clamp 104, a clamp earth 106, and a contact bridge 110 driven by a drive mechanism 112 mounted on a support frame 113.
  • the contact bridge 110 has a blade shape and constitutes a first movable contact in knife 114 at one of its ends and a second movable double knife contact 116 at the opposite end.
  • the pliers 104, 106 are fixed relative to the chassis 113.
  • the drive mechanism 112 includes a drive shaft 118 driven by a motor mechanism not shown.
  • the shaft 118 is arranged perpendicular to the plane of the figures and pivots around an axis of rotation 122, guided by bearings supported with respect to the chassis 113.
  • the shaft carries a double crank 124.
  • the crank supports a first pivot 126 allowing the articulation of a first connecting rod intermediate 128, and a second pivot 130 allowing the articulation of a second intermediate rod 132.
  • the first rod 128 is also articulated on the bridge of contact 110, around a first pivot 134 of the contact bridge, located near the first movable contact 114.
  • the second connecting rod 132 is also articulated on the contact bridge 110, near the second movable contact member 116, around a second pivot 136 from the bridge.
  • a guide rod 140 is articulated between the second pivot 136 of the bridge and a pivot 142 for rotation about a geometric axis fixed relative to the chassis 113, placed in immediate proximity the first contact clamp 102.
  • the geometric axes of rotation of pivots 126, 130, 134, 136, 142 are all parallel to the geometric axis of rotation 122 of the drive shaft 118, so that the movement of the contact bridge 110 is plane, that is to say parallel to the plane of the figures.
  • the first phase is an opening phase, which allows to pass the position closed in Figure 5 to the open transient position in Figure 6.
  • the crank 124 pivots counterclockwise and drives both intermediate connecting rods 128, 132.
  • the second pivot 136 which is constrained by the connecting rod guide 140 to follow a circular path around the fixed geometric axis of the pivot 142, moves very little, so that the contact bridge 110 performs a movement of rotation around the instantaneous center of rotation which, during the first phase, remains located at the second clamp 104 and the second knife 116, allowing separation between the first clamp 102 and the first knife 114 while requiring the maintenance of the second knife 116 in the second clamp 104.
  • the limitation of movement imposed by the guide rod 140 on the second pivot 136 of the contact bridge is close to that imposed by the first ramp 66 of the slide 70 of the first mode of realization of the invention.
  • the second phase is a double sectioning phase, in which the movement limitation imposed by the guide rod 140 on the second pivot 136 of the contact bridge is similar to that imposed by the second ramp 72 of the slide 64 of the first embodiment of the invention.
  • Contact bridge 110 undergoes movement compound comprising a clockwise rotation around a instantaneous center of rotation located near the first pivot of the bridge. At the end of the sectioning, the bridge 110 finds itself in a position parallel to its closed position, approximately equal distance from the two connection clamps 102, 104, at a distance to ensure double sectioning, i.e. sectioning opposite of each of the connection clamps 102, 104.
  • the third phase of the movement is the actual grounding phase, in which the bridge 110 continues to rotate clockwise until the first movable contact 114 again enters the first clamp 102 while the second movable contact 116 enters the earthing clamp 106, causing the earthing earth or to the earth of the conductor linked to the first connection clamp 102.
  • the instantaneous center of rotation is more or less between the first and the second pivots 134, 136 of the contact bridge.
  • the position of the bridge in figure 8 is approximately between 60 and 90 ° from its closed position.
  • the closing takes place in a reverse sequence, caused by the rotation of the drive shaft 118 in a clockwise direction and passing from the position of Figure 8, to the position of Figure 7, then to that of Figure 6 to the position of figure 5.
  • the slide can be replaced by a guide rod as described in the second embodiment.
  • the connecting rod can be replaced by a slide which would have two ramps identical to that of the first embodiment, and one third ramp corresponding to the path taken by the second pivot in the third phase of the movement according to the second embodiment.
  • Clamp contacts can be replaced by any other type of contact allowing a pivoting movement between the second movable contact member and the second connection contact member.
  • the connecting rods of the mechanism can advantageously be doubled so as to provide better guidance.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP20020354070 2001-06-11 2002-04-26 Elektrisches Schaltgerät mit beweglicher Kontaktbrücke Expired - Fee Related EP1267374B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0107564 2001-06-11
FR0107564 2001-06-11

Publications (2)

Publication Number Publication Date
EP1267374A1 true EP1267374A1 (de) 2002-12-18
EP1267374B1 EP1267374B1 (de) 2010-10-27

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ID=8864134

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Application Number Title Priority Date Filing Date
EP20020354070 Expired - Fee Related EP1267374B1 (de) 2001-06-11 2002-04-26 Elektrisches Schaltgerät mit beweglicher Kontaktbrücke

Country Status (4)

Country Link
EP (1) EP1267374B1 (de)
CN (1) CN1249755C (de)
DE (1) DE60238096D1 (de)
NO (1) NO322270B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108493033A (zh) * 2018-05-16 2018-09-04 许昌亿源电气有限公司 一种户外高压隔离开关

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018222848A1 (de) * 2018-12-21 2020-06-25 Siemens Aktiengesellschaft Erdungsschalter für eine Mittel- und/oder Hochspannungs-Schaltungseinrichtung und entsprechende Schaltungseinrichtung
CN112176895B (zh) * 2020-10-19 2021-11-23 江苏盛达福交通工程有限公司 道路交通标线投影装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1465937A1 (de) * 1964-08-26 1969-05-29 Licentia Gmbh Trennschalter bzw. Lasttrennschalter fuer Hochspannung
DE1690506A1 (de) * 1967-09-09 1971-06-03 Wickmann Werke Ag Hochspannungs-Lasttrennschalter
DE2434438A1 (de) * 1974-07-17 1976-01-29 Concordia Sprecher Schalt Lasttrennschalter
US4263487A (en) * 1980-03-31 1981-04-21 Electrical Equipment, Inc. Air switch
FR2511807A1 (fr) * 1981-08-20 1983-02-25 Alsthom Atlantique Sectionneur interrupteur multipolaire a embrochage et debrochage sur un jeu de barres

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1465937A1 (de) * 1964-08-26 1969-05-29 Licentia Gmbh Trennschalter bzw. Lasttrennschalter fuer Hochspannung
DE1690506A1 (de) * 1967-09-09 1971-06-03 Wickmann Werke Ag Hochspannungs-Lasttrennschalter
DE2434438A1 (de) * 1974-07-17 1976-01-29 Concordia Sprecher Schalt Lasttrennschalter
US4263487A (en) * 1980-03-31 1981-04-21 Electrical Equipment, Inc. Air switch
FR2511807A1 (fr) * 1981-08-20 1983-02-25 Alsthom Atlantique Sectionneur interrupteur multipolaire a embrochage et debrochage sur un jeu de barres

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108493033A (zh) * 2018-05-16 2018-09-04 许昌亿源电气有限公司 一种户外高压隔离开关

Also Published As

Publication number Publication date
DE60238096D1 (de) 2010-12-09
EP1267374B1 (de) 2010-10-27
CN1391246A (zh) 2003-01-15
CN1249755C (zh) 2006-04-05
NO20022763L (no) 2002-12-12
NO322270B1 (no) 2006-09-04
NO20022763D0 (no) 2002-06-10

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