Classifications

• • 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
  • H01H31/003—Earthing switches
• • 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
  • H01H33/122—Load break switches both breaker and sectionaliser being enclosed, e.g. in SF6-filled container
• • 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
  • H01H33/127—Load break switches comprising a separate circuit breaker movable with a sectionalising contact arm and operated by such movement
• • 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
  • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
  • H01H33/66—Vacuum switches
  • H01H33/666—Operating arrangements
  • H01H33/6661—Combination with other type of switch, e.g. for load break switches
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2239/00—Miscellaneous
  • H01H2239/006—Containing a capacitive switch or usable as such

Definitions

• the invention relates to a three-position circuit breaker for medium-voltage switchgear with an extinguishing contact system for extinguishing an arc at a switch-off of the switching device and a connected to the extinguishing contact system in series main contact system for forming a dielectric separation gap in an open state of the main ⁇ contact system and extinguished arc, and a grounding contact system ,
• an extinguishing contact system for extinguishing an arc in the form of a vacuum interrupter for a circuit breaker, which extinguishing contact system connected in series a main contact system for forming a dielectric separation gap in an open state of the main contact system with arc extinguished in the form ei ⁇ pivotal contact of a circuit breaker, which is arranged in a container filled with an insulating gas, provided, by means of a coupled to the pivotal contact of the circuit breaker a driving movement ⁇ in a moving contact of the vacuum interrupter of the extinguishing contact system can be introduced, so that at a turn-off the switching device via the cam the extinguishing contact system is opened and an arc is extinguished before the main contact system in its open state under Ausbil tion of a dielectric separation path is transferred.
• Object of the present invention is to provide a switching device of the type mentioned, which has a compact design. According to the invention this is achieved in a three-position load ⁇ disconnector of the type mentioned in that the main contact system a first fixed contact and a second fixed contact, which are diametrically opposed, and a NEN means of a centrally disposed between the first and second fixed contact rotary support rotatable moving contact with integrated therein extinguishing contact system.
• the three-position circuit breaker according to the invention is in other words in the form of a Dreiwolfslasttrenn rotary switch formed with diametrically opposed first and second fixed contact and a rotatable by means of a centrally disposed between the first and second fixed contact drive shaft moving contact, which for selectively forming a conductive connection between the first and the second fixed contact or to interrupt the connection between the first and the second fixed contact, and has by the integrated in the rotatable moving contact erg contact system a compact design, because the extinguishing contact system is part of the moving contact of Hauptkon ⁇ is clock system , so that the space requirement compared to separate, spatially sequentially arranged components is significantly reduced.
• Such trained load-disconnecting rotary switch can be arranged in a filled with an insulating gas, such as N2 or the like, container of a medium-voltage switchgear.
• the extinguishing contact system is formed by a vacuum interrupter, where ⁇ at a moving contact terminal bolt of the vacuum interrupter has a guide element, by means of a curved path of the switching device, a drive movement for opening or closing the extinguishing contact system can be introduced.
• the curved path for initiating the drive movement in the moving contact connection pin for closing the extinguishing contact system during the rotational movement of a switching of the switching ⁇ device is designed such that a Einschaltlichtbogen is ignitable only in the main contact system.
• Erase contact system can be used advantageously in the switching device, a non-turn-off vacuum interrupter, because in such a configuration, the vacuum interrupter is closed by initiating the forced movement on the curved path before the moving contact of the main contact system the necessary distance to form a dielectric separation distance to the first and second fixed contact is undershot, so that only when the vacuum interrupter is closed or closed extinguishing contact system, an arc in the main contact system can be ignited, of which the vacuum interrupter but is not affected by their closed contact system, which is inexpensive einschaltfest not executable bar.
• the grounding contact system is formed by a ground contact, a ground counter contact, which are diametrically opposite, and the rotatable moving contact.
• Figure 1 shows a three-position load disconnect rotary switch 1 with a first fixed contact 2, for example, provided for connection to a busbar terminal of a switchgear not shown figuratively and the first fixed ⁇ contact 2 diametrically opposite second fixed contact 3, which, for example, to connect to a Abgangsan- the circuit Switchgear is provided.
• a rotatable moving ⁇ contact 4 is coupled by means of a centrally between the first fixed contact 2 and the second fixed contact 3 arranged rotary support 5 with a drive shaft, not shown figuratively for initiating a rotational movement in the rotary support 5 and execution of a rotary movement of the rotatable moving contact 4 and provided for selectively forming a conductive connection between the first fixed contact 2 and the second fixed contact 3, as shown in Figure 1, or for breaking the conductive connection between the first fixed contact 2 and the second fixed contact 3, as with reference to the figure 2, or for forming a grounding position via a grounding contact 6 for grounding switchgear parts electrically connected to the second fixed contact 3, as explained in greater detail below with reference to FIG.
• an extinguishing contact system in the form of a vacuum interrupter 7 Arranged in the rotary support 5 and in the Moving contact 4 is integrated an extinguishing contact system in the form of a vacuum interrupter 7, the fixed contact terminal pin 8 is connected to the moving contact 4 directly conductive, the moving contact terminal pin 9 is also connected to the rotary movable contact 4 directly conductive.
• the Bewegkon ⁇ clock terminal bolt 9 of the vacuum interrupter 7 is mechanically coupled to a contact bridge 10, which for actuating the moving contact terminal shaft 9 of the vacuum interrupter 7 and for introducing a drive movement in the BewegWallet- connecting pin 9 for opening or closing the clear contact system of the vacuum interrupter 7 is provided.
• the switching ⁇ bridge 10 has for this purpose a guide member 11 in the form of at ⁇ game as a roller or a projection on which guide element engages in a cam track 12 of yoke 13 11, so that upon initiation of a rotational movement into the rotary moving contact 4 through the guide member 11
• a guide sleeve 14 is provided for the axial guidance of the moving contact connecting bolt 9 and for receiving radial loads on the vacuum interrupter 7.
• a contact pressure spring 15 is furthermore arranged, which is provided in the closed state for applying the necessary contact pressure to the extinguishing contact system.
• the switching device 1 of Figure 1 is shown in a closed position in which the rotatable moving contact 4 is in egg ⁇ ner 0 ° position in a closed position in contact with the first fixed contact 2 and the second fixed contact 3 and the extinguishing contact system the vacuum interrupter 7 with the deletion contact 17 and the erase contact 18 is just ⁇ if in its closed position.
• Figure 4 shows a three-pole version of a load-disconnect rotary switch 1 with three individual poles according to the three-position circuit breaker 1 described in Figures 1 to 3, wel ⁇ che coupled via coupling elements 20 to each other, so that via the coupling elements 20 and the connection of je ⁇ Weils outer Side of the rotary support 5 on coupling sides 21 to a drive shaft, not shown figuratively a syn ⁇ chronous switching operation for all three phases is executable.
• the grounding contacts 6 of the three phases are connected ver ⁇ and to ground via a connecting element 22 with each other.
• a switching device 1 has been described intracsbei ⁇ play, in which the vacuum switch tube 7 is guided as not einschaltfeste vacuum interrupter from ⁇ , ie the vacuum interrupter 7 is already closed during a switch-on operation of the switching device 1, before a Starting arc ignited on the main contact system becomes.
• a vacuum interrupter that does not turn ⁇ fixed and therefore can not be switched to a load current or a short circuit, is particularly inexpensive and therefore advantageous.
• the switching device 1 is preferential example for assembly with an insulating gas, such as N2, filled gas space of a medium-voltage switchgear ⁇ provided in a.

Landscapes

• High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
• Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
• Arc-Extinguishing Devices That Are Switches (AREA)
• Breakers (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=47356002

Family Applications (1)

Country Status (5)

Cited By (2)

Families Citing this family (8)

Citations (3)

Family Cites Families (3)

• 2011
  • 2011-12-02 DE DE102011087630.8A patent/DE102011087630B4/de not_active Expired - Fee Related
• 2012
  • 2012-11-21 EP EP12799517.3A patent/EP2766914B1/de active Active
  • 2012-11-21 WO PCT/EP2012/073260 patent/WO2013079381A1/de active Application Filing
  • 2012-11-21 IN IN1104KON2014 patent/IN2014KN01104A/en unknown
  • 2012-11-21 CN CN201280058744.8A patent/CN103959417B/zh active Active

Patent Citations (3)

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