EP1006548A1 - Hochspannungsschalter - Google Patents

Hochspannungsschalter Download PDF

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Publication number
EP1006548A1
EP1006548A1 EP98870264A EP98870264A EP1006548A1 EP 1006548 A1 EP1006548 A1 EP 1006548A1 EP 98870264 A EP98870264 A EP 98870264A EP 98870264 A EP98870264 A EP 98870264A EP 1006548 A1 EP1006548 A1 EP 1006548A1
Authority
EP
European Patent Office
Prior art keywords
blades
distance
central axis
movable shaft
switch according
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
EP98870264A
Other languages
English (en)
French (fr)
Other versions
EP1006548B1 (de
Inventor
Rik Vandoorne
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.)
Het Veer NV
Original Assignee
Het Veer NV
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 Het Veer NV filed Critical Het Veer NV
Priority to DE69833181T priority Critical patent/DE69833181D1/de
Priority to EP98870264A priority patent/EP1006548B1/de
Priority to AT98870264T priority patent/ATE315831T1/de
Publication of EP1006548A1 publication Critical patent/EP1006548A1/de
Application granted granted Critical
Publication of EP1006548B1 publication Critical patent/EP1006548B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/886—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts by movement of rotating pistons
    • 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
    • H01H31/16—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 with angularly-movable bridging contact or contact-carrying member

Definitions

  • the present invention relates to a switch with high tension comprising: a movable shaft arranged to be rotated along an axis of rotation between an engagement position and trigger, the movable shaft comprising first and second sides located on either side of the axis of rotation and a through hole the first and second flanks; a pair of moving through contacts the hole and extending beyond each of the first and second flanks; a first pair of ventilation blades comprising first and second blades extending on either side of the pair of contacts movable beyond the first side of the movable shaft; a second pair of ventilation blades including third and fourth blades extending on either side of the pair of movable contacts beyond the second side of the movable shaft; each blade including a central axis, a first side and a second side located opposite the first side.
  • Patent application EP-A-0 518 837 describes a arrangement in which ventilation blades extend from the movable shaft and are connected to the sides of the shaft.
  • the blades of a pair blades are identical in shape but are positioned at angles predetermined different, so that when the movable shaft is brought in rotation, turbulence is generated in the area around the arc.
  • ionized gas present around the arc is displaced by fresh gas, which leads to the extinction of the arc.
  • An object of the present invention is to provide a high voltage switch comprising a ventilation system which effectively extinguishes electric arcs caused during the triggering of the switch.
  • Another purpose of this invention is to provide ventilation blades which can easily be suitable for known high-voltage switches.
  • each ventilation blade extends essentially perpendicularly to mobile contacts; each of the first and fourth blades includes first and second legs extending parallel to on either side of the central axis, each of the first and second legs comprising: an inner edge extending parallel to the central axis at a distance D1 from the central axis; an outer edge extending parallel to the central axis at a distance D2 from the central axis; and each of the second and third blades includes third and fourth legs extending parallel on either side of the axis central, an opening being provided in each of the third and fourth legs, the opening being bounded by an inner edge located at a distance D5 from the central axis, the distance D5 being less than the distance D2; and an outer edge located at a distance D6 from the axis central, the distance D6 being greater than the distance D2.
  • the first and third blades are connected by a first base and the second and fourth blades are connected by a second base.
  • each movable contact has an outer face located at a distance D7 from the central axis of the blades, the distance D7 being less than the distance D1.
  • the present invention also relates to a blade of ventilation arranged to be used in a high voltage switch.
  • FIG. 1 illustrates a preferred embodiment of an assembly according to the invention.
  • a first ventilation blade 66 includes a first tab 12 and a second tab 14 which extend parallel on either side of the central axis 74 of the blades.
  • a second ventilation blade 68 includes a third tab 16 and a fourth tab 18 which also extend parallel in part and on the other side of the central axis 74 of the blades.
  • the first and second blades are of different shape and are connected by a basic element 10.
  • the blades are preferably made of reinforced polycarbonate with a thickness of less than 3 mm, in particular approximately equal to 2 mm. The thickness chosen guarantees good flexibility of the blades.
  • the first and second legs 12, 14 each have a inner edge 20, 22 and an outer edge 24, 26 extending parallel to the central axis.
  • the inner edges 20, 22 are located at a distance D1 of the central axis.
  • the outer edges 24 are located at a distance D2 of the central axis.
  • the third and fourth legs 16, 18 each have a inner edge 28, 30 and an outer edge 32, 34 extending parallel to the central axis.
  • the inner edges 28, 30 are located at a distance D3 of the central axis.
  • the outer edges 32, 34 are located at a distance D4 from the central axis.
  • the outer edges 32, 34 must not imperatively extend parallel to the central axis. According to one alternative, the outer edges 32, 34 extend at an angle determined with respect to the central axis. It is also conceivable that the outer edge is curved.
  • An opening 36 is provided in each of the third and fourth legs 16, 18.
  • the opening 36 is shaped rectangular, which creates a turbulence zone for effectively extinguish the electric arc.
  • the opening is delimited by an inner edge 37 and an outer edge 39.
  • the inner edge 37 is located at a distance D5 from the central axis, while the outer edge 39 is located at a distance D6 from the central axis. It is important that the distance D5 is less than the distance D2 and the distance D6 is greater at distance D2, in order to guarantee a flow of fresh gas as well as an area of turbulence around the electric arc, as will be explained below with reference to Figure 5.
  • the base 10 preferably includes notches 38, 40 arranged to fit in a stop element provided in the movable shaft, to ensure proper positioning of the assembly of Figure 1 by compared to the moving shaft.
  • FIG. 2 is a perspective view of part of the switch according to the invention.
  • a movable shaft 50 known as such, is arranged to be brought into rotation along an axis of rotation 76.
  • the movable shaft comprises a first side 54 and a second side 56. The sides are located on either side of the axis of rotation 76.
  • the shaft mobile illustrated in Figure 2 is arranged to be used in a switch tripolar. Consequently, it has three holes 58 each passing through first and second flanks.
  • a pair of movable contacts 52 is housed.
  • the movable contacts protrude from the sides 54 and 56 of the moving shaft.
  • the blades are arranged essentially perpendicular to the planes main mobile contacts.
  • On the side of the first flank 54 extends a first pair of ventilation blades comprising a first blade 66 and a second blade 68.
  • On the side of the second side 56 extends a second pair of ventilation blades comprising a third blade 70 and a fourth blade 72.
  • the fourth blade 72 is similar to the first blade 66, while the third blade 70 is similar to the second blade 68.
  • FIG. 3 is a front sectional view of a switch according to the invention, comprising the assembly of FIG. 2.
  • the assembly formed by the movable shaft 50, the movable contacts 52 and the blades ventilation 66, 68, 70, 72 is housed in an envelope 64 known as as such.
  • a gas typically SF6 or other insulating gas, for example air.
  • the gas contained in the envelope is under a absolute pressure of 1.5 bar maximum.
  • the envelope itself can be made of an insulating material.
  • the envelope insulating material is metallic. In this case, insulation is provided around the fixed contacts 60, 62.
  • Fixed contacts 60 and 62 are arranged on the envelope so that they can be connected to each other via movable contacts 52, when the movable shaft 50 is brought towards the latching position I.
  • connection of the two fixed contacts 60 and 62 is interrupted. Since this is a double switch break, the electric arc is formed at the level of the two fixed contacts when the rotary shaft is brought from the latching position I to the trigger position.
  • FIG. 4 is a sectional side view of the switch according to figure 3.
  • Each opening 36 of the second and fourth blades is delimited by an edge interior 37, located at a distance D5 from the central axis 74, and an edge outside 39, located at a distance D6 from the axis.
  • Each leg of first and fourth blades includes an outer edge 24 located at a distance D2 from the central axis.
  • overlap is meant that the distance D2 is greater than distance D5, but less than the distance D6.
  • springs 78 arranged to press the ends of the movable contacts 52 towards each other the others, so as to guarantee good contact between the movable contacts and fixed contacts 60 and 62.
  • FIG. 5 is a detail illustrating the gas flow when the switch is brought to a tripping position.
  • an electric arc 80 is formed when the contacts mobile 52 are moved from the latched position to the position trigger.
  • a gas flow illustrated by arrows, is created.
  • the movable shaft is moved at a relatively high speed.
  • the ends of the movable contacts are moved at a speed ranging from 5 to 9 meters per second. The speed is chosen so to obtain a fair balance between the mechanical properties of the blades and electrical performance at this speed. Due to the shape and arrangement of the blades a turbulence is created, which makes it possible to extinguish effectively the electric arc.
  • the distance D2 is less than the distance D6, but greater than distance D5. Therefore, part of the gas flow passing through the opening 36, abuts against the blade 66, while another part passes beyond the outer edge 24 of the blade 66. This condition relative dimensions of the distances D2, D5 and D6 has been found necessary for the device to function properly.
  • the inner edge 20 of the tab 66 is located at a distance D1 greater than the distance D7, the distance D7 being the distance from the outer face of the movable contacts relative to the axis central. This condition makes it possible to bring part of the gas flow between the outer face of the movable contacts and the inner edge of the first and fourth blades.
  • the inner edge 28 of the legs of the second and third blades 68, 70 is located at a distance D3 from the central axis. This distance D3 is preferably less than the distance D7.
  • the gas flow generates a slight overpressure at the front of the blades in the direction of release (indicated by arrow O), while a slight depression is generated at the rear of the blades. This results in a turbulence of the insulating gas, forcing it to converge towards the electric arc area. This dynamic effect on the insulating gas allows rapid regeneration of the ionized insulating gas in the arc area electric, which contributes efficiently and quickly to extinction of the arc.
  • the present invention is not limited to three-pole connections.
  • the number of poles can be different; she can for example be applied in bipolar switches or unipolar.
  • a pair of movable contacts as well as first and second pairs of blades are arranged in the shaft mobile as described above.
  • the blades illustrated in the figures are arranged to be removably housed in the movable shaft. According to an alternative, the blades are integrated into the movable shaft and the assembly is molded in one room.
  • the present invention can also be applied in a three-position switch: a latching position, a trigger position, and a neutral position connecting one of the contacts fixed to an earth contact.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Electronic Switches (AREA)
  • Amplifiers (AREA)
  • Surgical Instruments (AREA)
EP98870264A 1998-12-04 1998-12-04 Hochspannungsschalter Expired - Lifetime EP1006548B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE69833181T DE69833181D1 (de) 1998-12-04 1998-12-04 Hochspannungsschalter
EP98870264A EP1006548B1 (de) 1998-12-04 1998-12-04 Hochspannungsschalter
AT98870264T ATE315831T1 (de) 1998-12-04 1998-12-04 Hochspannungsschalter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98870264A EP1006548B1 (de) 1998-12-04 1998-12-04 Hochspannungsschalter

Publications (2)

Publication Number Publication Date
EP1006548A1 true EP1006548A1 (de) 2000-06-07
EP1006548B1 EP1006548B1 (de) 2006-01-11

Family

ID=8237129

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98870264A Expired - Lifetime EP1006548B1 (de) 1998-12-04 1998-12-04 Hochspannungsschalter

Country Status (3)

Country Link
EP (1) EP1006548B1 (de)
AT (1) ATE315831T1 (de)
DE (1) DE69833181D1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115985713A (zh) * 2023-02-20 2023-04-18 纳图智能科技(常州)有限公司 一种防护型真空断路器
EP3961668B1 (de) 2019-04-26 2023-06-07 Ormazabal Y Cia S.L.U. Abschalter für gasisolierte schaltanlage

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2019739A5 (de) * 1967-12-21 1970-07-03 Inst Prueffeld Elekt
EP0484747A2 (de) * 1990-11-06 1992-05-13 G & W ELECTRIC COMPANY Rotierender Druckgasschalter
EP0518837A1 (de) * 1991-06-12 1992-12-16 Abb Distribusjon As Anordnung in einem mit SF6 isolierten Hochspannungs-Lastschalter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2019739A5 (de) * 1967-12-21 1970-07-03 Inst Prueffeld Elekt
EP0484747A2 (de) * 1990-11-06 1992-05-13 G & W ELECTRIC COMPANY Rotierender Druckgasschalter
EP0518837A1 (de) * 1991-06-12 1992-12-16 Abb Distribusjon As Anordnung in einem mit SF6 isolierten Hochspannungs-Lastschalter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3961668B1 (de) 2019-04-26 2023-06-07 Ormazabal Y Cia S.L.U. Abschalter für gasisolierte schaltanlage
CN115985713A (zh) * 2023-02-20 2023-04-18 纳图智能科技(常州)有限公司 一种防护型真空断路器
CN115985713B (zh) * 2023-02-20 2023-10-10 纳图智能科技(常州)有限公司 一种防护型真空断路器

Also Published As

Publication number Publication date
DE69833181D1 (de) 2006-04-06
ATE315831T1 (de) 2006-02-15
EP1006548B1 (de) 2006-01-11

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