EP0214083A1 - Disjoncteur-sectionneur pour des réseaux à moyenne tension - Google Patents

Disjoncteur-sectionneur pour des réseaux à moyenne tension Download PDF

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Publication number
EP0214083A1
EP0214083A1 EP86730115A EP86730115A EP0214083A1 EP 0214083 A1 EP0214083 A1 EP 0214083A1 EP 86730115 A EP86730115 A EP 86730115A EP 86730115 A EP86730115 A EP 86730115A EP 0214083 A1 EP0214083 A1 EP 0214083A1
Authority
EP
European Patent Office
Prior art keywords
contact
ring
burning
switch
slotted
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
EP86730115A
Other languages
German (de)
English (en)
Other versions
EP0214083B1 (fr
Inventor
Hans-Jürgen Dr.-Ing. Reinhardt
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to AT86730115T priority Critical patent/ATE53700T1/de
Publication of EP0214083A1 publication Critical patent/EP0214083A1/fr
Application granted granted Critical
Publication of EP0214083B1 publication Critical patent/EP0214083B1/fr
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
    • H01H33/02—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
    • H01H33/125—Load break switches comprising a separate circuit breaker
    • H01H33/126—Load break switches comprising a separate circuit breaker being operated by the distal end of a sectionalising contact arm
    • 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
    • H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet

Definitions

  • the invention relates to a load-break switch for the medium-voltage range with separable main contacts and an extinguishing tube made of plastic, which contains a movable contact piece with a burn-off ring and a standing contact piece with an associated burn-off contact, which form a parallel current path to the main contacts, in which the movable Contact piece contains a switching pin with a locking head and an annular edge flange, which is located on the side of the switching pin facing away from the locking head, is connected to the burning ring and ends in a piston-like extinguishing body made of gas-emitting insulating material, which has a narrow gap to the extinguishing tube.
  • Such a load break switch is known from DE-OS 31 11 790.
  • the stationary contact is hollow-cylindrical and in the movable contact, the switching pin ends in the bottom of a hollow cylinder surrounding it with an edge flange.
  • the two main contacts are first disconnected and the current flows via the parallel current path in the quenching tube, formed from the upright hollow cylindrical contact and the movable contact, the edge flange of which is in contact with the hollow cylindrical contact.
  • the switching pin of the movable contact piece is carried along by the locking head against the force of a return spring.
  • the edge flange with the burning ring is pulled out of the hollow cylindrical contact piece, so that an arc is created in the gap between the extinguishing tube and the piston-like extinguishing body.
  • the base points of the arc are itself on the burn ring or burn contact.
  • the arc releases gases from the plastic of the quenching tube as well as from the gas-emitting insulating material of the quenching body, which cools the arc and extinguishes it in a current zero crossing.
  • the arc is generally always drawn at the same point on the circumference of the contact piece and the edge flange and thus also at the same point on the burn-off contact or burn-off ring connected to them, namely, starting from the best current contact point along the circumference, due to construction and manufacturing tolerances or by special pressure means.
  • the arc always remains in the same place even after it has run out of the narrow gap in which it was drawn.
  • the erosion of the extinguishing body and the extinguishing tube are concentrated at this point and this local combustion leads to a reduced service life of the extinguishing system of the switch disconnector.
  • a switch disconnector in which the movable contact piece in the extinguishing system contains a switching pin with a latching head, which ends on the other side in an annular contact, behind which there is an extinguishing pin that has a narrow gap Extinguishing tube has.
  • the associated standing contact piece is designed as a current conducting path which corresponds to a surface line of the extinguishing tube.
  • a pressure element is provided, which is diametrically opposite to the standing switching piece and ensures the contact between the standing and the movable.
  • the invention is based on the object of designing a circuit breaker in such a way that the erosion caused by the switch-off arc is as uniform as possible over the circumference of the extinguishing tube or body is distributed so that the life of the extinguishing system increases.
  • the burn-off ring is slotted in a switch disconnector of the type described at the outset according to the invention, forms at least one turn and is connected on one side adjacent to the slot via a contact web with the edge flange.
  • This particular constructive design of the burning ring connected to the edge flange of the movable contact piece triggers a rotational movement in the event of an arc drawn to the side of the contact web, which is directed away from the contact web, so that the arc within its burning time in the extinguishing chamber formed by the extinguishing tube and the extinguishing body with one turn up runs to the end of the slotted burn ring, or rotates several times with two or more turns. This ensures uniform erosion of the quenching chamber.
  • the triggering of the rotation of the arc can be intensified by the fact that the burn-off contact of the standing contact is also a slotted ring, which is connected on one side adjacent to the slot via a contact web with the edge of the standing contact. It makes sense that the contact webs of the burn-off ring and the burn-off contact and the slots each lie on a longitudinal plane, so that rotation is ensured even with small lengths of arc, because the base points of the arc move in the same direction.
  • the slotted burn ring connected to the edge flange has only one turn and a pressure element is pre-selected see that ensures the contact pressure between the movable contact piece and the standing contact piece, it is advisable to place the pressing element approximately diametrically opposite to an area of the slotted burning ring, which at least from the contact web between the sliding contact ring and the slotted cutting ring on the continuous ring side five to ten contact widths away. As a result, almost the entire circumference of the slotted torch ring can be used for the arc rotation.
  • FIGS. 1 to 4 of the drawing show schematically a side view of a switch disconnector.
  • FIG. 2 schematically shows a longitudinal section through an extinguishing system of this switch disconnector designed according to the invention, the upper right part compared to the one shown Longitudinal plane is slightly rotated.
  • FIG. 3 shows, partly in a perspective view, a part of a movable switching element that is slightly modified compared to FIG. 2, and
  • FIG. 4 shows the stationary switching element.
  • Each pole of the switch disconnector 1 shown in Figure 1 consists essentially of three post insulators 2, 3, 4, which are attached to a frame-like frame 5 and carry the current-carrying elements.
  • the support insulator 2 thus carries the first connection device 6, which is connected via a flexible current strip 7 to the main contact 8 located on the support insulator 3.
  • the counter contact 9 for the locking head 10 of the movable switching piece 11 is arranged in the extinguishing system 12.
  • the extinguishing system 12 and the second main contact 13, as well as the second connection device 14 are fastened to the post insulator 4 via a carrier 15. While the post insulators 2 and 4 are fixed, the post insulator 3 is designed to be pivotable by means of a drive shaft 16 and a drive system, not shown, and carries out the on and off movement of the load-break switch 1.
  • the load break switch 1 is shown in the switched-off state.
  • the drive shaft 16 is actuated, thereby moving the support insulator 3 in the direction of the extinguishing system 12.
  • the main contact 8 comes into engagement with the main contact 13, while the counter contact 9 comes into engagement with the latching head 10 of the movable contact piece 11, which in turn is in contact with the standing contact piece 17 in the extinguishing system 12, which is also attached to the carrier 15.
  • the main contacts 8 and 13 first detach from each other, while the parallel current path from the first connection device 6 via the mating contact 9, the detent head 10 and the movable contact piece 11 and the corresponding standing contact piece 17 to the second connection device 14 is retained.
  • the latching head 10 is carried along by the counter-contact 9 during the opening movement against the force of a return spring, not shown, which is tensioned, and the movable switching element 11 initially slides along the stationary switching element 17. If the main contacts 8, 13 are at a sufficiently large distance from one another, the movable contact piece 11 also separates from the stationary contact piece 17 in the extinguishing system 12, and a switch-off arc 18 (FIG. 2) arises, which extinguishes before the latching head 10 is released. Finally, the locking head 10 detaches from the mating contact 9 and the movable contact piece 11 is returned to its starting position within the extinguishing system 12 by the return spring (not shown).
  • a return spring not shown
  • the extinguishing system 12 consists of a two-part outer extinguishing tube 19 made of plastic, which is attached to an annular part of the carrier 15, which is also connected to the hollow cylindrical switching element 17.
  • the switching pin 20 of the movable switching element 11 is arranged centrally in the interior of the extinguishing tube 19 and, with its end 21 facing away from the latching head 10, penetrates the bottom 22 of a hollow cylinder 23 made of copper and ends in a piston-like extinguishing body 24 surrounding the hollow cylinder 23.
  • the hollow cylinder 23 has an upper edge flange 25, the outer diameter of which is smaller than the inner diameter of the extinguishing tube 19.
  • the outside diameter of the piston-like extinguishing body 24 made of gas-emitting insulating material is also smaller than the inside diameter of the extinguishing tube 19, so that it forms a gap 26 with it.
  • the edge flange 25 of the wooden cylinder 23 is ver with a slotted burning ring 27 bound, for which a contact web 28 is located next to the slot.
  • the slotted burn ring 27 forms a turn.
  • the space between the edge flange 25, the hollow cylinder 23 and the burning ring 27 is filled by a spacer 29 made of insulating material.
  • the standing contact 17 is also connected to a burn-off contact 30, which is designed as a slotted ring and is connected on one side adjacent to the slot 31 (see FIG. 4) via the contact web 32 with the edge 33 of the standing contact 17.
  • the space between the edge 33 of the standing contact 17 and the burn-off contact 30 is filled with insulating material 34, the inner surface 35 of which is set back from the burn-off contact 30.
  • the two contact webs 28, 32 on the movable contact piece 11 and on the standing contact piece 17 each lie on the same longitudinal plane. They are not exactly diametrically opposed to a pressure element 36 consisting of a set screw, which lies in a longitudinal plane rotated to the longitudinal section of FIG. 2, but offset by about five to ten contact web widths on the continuous ring side.
  • the pressing element 36 acts on the surface of the extinguishing body 24 so that there is a clear contact between the crowned outer surface 37 of the burning ring 27 and the inner circumferential surface 38 of the hollow cylindrical, standing switching element 17 by five to ten contact web widths compared to the diametrically offset point and the switch-off arc 18 is drawn there in each case.
  • the current flows from the first connection device 6 and the mating contact 9 to the detent head 10. Then via the switching pin 20 and the base 22, as well the hollow cylinder 23 to the edge flange 25. This is indicated by small arrows. The current flows from the edge flange 25 via the contact web 28 Burn ring 27 over. As long as the burning ring 27 is located within the hollow cylindrical, standing contact 17, the current passes from the burning ring 27 via its spherical outer surface 37 to the inner lateral surface 38 of the standing contact 17 and is then passed via the carrier 15 to the second connection device.
  • the switch-off arc 18 is therefore safe with a further switch-off movement ignited at the burn-off contact 30 and not at the edge 33.
  • the other base point of the switch-off arc 18 lies on the burn-off ring 27.
  • the burn-off ring 27 and the burn-off contact 30 are slotted rings, the current from the arc base via the respective contact web 28 or 32 must be around five to ten contact web widths are flowing and this creates magnetic forces which drive the switch-off arc 18 away from the contact point to the other end of the slotted burn ring 27 or 30.
  • the switch-off arc 18 releases gases from the adjacent surfaces of the quenching body 24 or the quenching tube 19 during its burning.
  • the areas exposed to the arc are distributed over part or even over the entire circumference of the extinguishing system 12. The parts of the extinguishing system 12 are therefore more uniformly stressed and the life of the extinguishing system 12 is increased accordingly.
  • FIG. 3 shows a perspective and schematic of the hollow cylinder 23, not cut, with its edge flange 25. This is connected to the burning ring 27 via the contact web 28.
  • the burning ring 27 here has two turns 39, 40, which are each interrupted by a slot 41.
  • the course of the current during the burning of the shutdown arc 18 is indicated by arrows.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Keying Circuit Devices (AREA)
  • Circuit Breakers (AREA)
EP86730115A 1985-08-01 1986-07-22 Disjoncteur-sectionneur pour des réseaux à moyenne tension Expired - Lifetime EP0214083B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86730115T ATE53700T1 (de) 1985-08-01 1986-07-22 Lasttrennschalter fuer den mittelspannungsbereich.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853527880 DE3527880A1 (de) 1985-08-01 1985-08-01 Lasttrennschalter fuer den mittelspannungsbereich
DE3527880 1985-08-01

Publications (2)

Publication Number Publication Date
EP0214083A1 true EP0214083A1 (fr) 1987-03-11
EP0214083B1 EP0214083B1 (fr) 1990-06-13

Family

ID=6277602

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86730115A Expired - Lifetime EP0214083B1 (fr) 1985-08-01 1986-07-22 Disjoncteur-sectionneur pour des réseaux à moyenne tension

Country Status (3)

Country Link
EP (1) EP0214083B1 (fr)
AT (1) ATE53700T1 (fr)
DE (2) DE3527880A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE758950C (de) * 1940-02-09 1952-04-17 Porzellanfabrik Kahla Fuer Starkstromschalter bestimmter stift- und huelsenfoermiger Unterbrechungskontakt
DE3111790A1 (de) * 1981-03-20 1982-09-30 Siemens AG, 1000 Berlin und 8000 München Lasttrennschalter mit trennkontakten und mit einer loescheinrichtung
DE3319010A1 (de) * 1982-05-24 1983-11-24 Tokyo Shibaura Denki K.K., Kawasaki, Kanagawa Gasisolierter schalter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE758950C (de) * 1940-02-09 1952-04-17 Porzellanfabrik Kahla Fuer Starkstromschalter bestimmter stift- und huelsenfoermiger Unterbrechungskontakt
DE3111790A1 (de) * 1981-03-20 1982-09-30 Siemens AG, 1000 Berlin und 8000 München Lasttrennschalter mit trennkontakten und mit einer loescheinrichtung
DE3319010A1 (de) * 1982-05-24 1983-11-24 Tokyo Shibaura Denki K.K., Kawasaki, Kanagawa Gasisolierter schalter

Also Published As

Publication number Publication date
EP0214083B1 (fr) 1990-06-13
DE3672017D1 (de) 1990-07-19
DE3527880A1 (de) 1987-02-05
ATE53700T1 (de) 1990-06-15

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