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
  • H01H33/60—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
  • 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
  • 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
  • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
  • H01H31/003—Earthing switches

Definitions

• the invention relates to a device for switching an electrical current with a quenching contact arrangement for switching on the device under current flow and for erasing an arc that occurs when switching off and a disconnecting contact arrangement connected in series with the quenching contact arrangement for providing a required dielectric strength and with a drive for generating a Wegbewe ⁇ tion , which can be introduced via a drive kinematics in the Löschtempoan accent.
• Such a device is from the catalog HA 35.41 you “were Mittelhardsan ⁇ " ⁇ mens AG from 2003 with the title already known.
• a breaker panel is shown on page 17 in schema- diagram showing that a gas-tight and sulfur hexafluoride has filled Gasbe ⁇ container.
• vacuum interrupters each show a clear contact arrangement with this case, each vacuum interrupter is a phase.
• a three-phase network zugeord ⁇ net is connected via a copper line with a respective isolating contact arrangement, with the separating contact assemblies of the other phases
• the isolating contact arrangement and the extinguishing contact arrangement of each phase are connected in series between a current-supplying busbar and cable outlet lines, wherein the extinguishing contact arrangement for extinguishing a in the separation tion of their extinguishing contacts drawn arc is set up in vacuum. After the arc has been extinguished, the isolating contact pieces of the isolating contact arrangement are de-energized and separated from each other with sufficient spacing, to provide the required withstand voltage.
• the isolating contact arrangement is connected to a disconnector drive and the clear contact ⁇ arrangement with a delete drive.
• the respective drive kinematics are coupled to one another via a suitable locking mechanism.
• Sepa ⁇ rate drives and locking mechanisms are complex in their construction and contribute to the cost of the device.
• a device with an erase contact arrangement and a break contact arrangement is known, which are connected in series with each other, this series circuit is used to bridge a main contact arrangement.
• a guide pin is attached to a vacuum housing of the extinguishing contact arrangement, which is pressed during the switching operation to a cam profile of the cam and guided along this.
• the known device is however complex also ih ⁇ rer construction. Furthermore, it comes to the movement of the vacuum housing and arranged therein Löschumbleanord ⁇ tion, which are sensitive components. The Be ⁇ movement of these sensitive components makes the previously known device maintenance prone.
• the object of the invention is to provide a device of the type mentioned, which has a little complex construction and in which further movement of mechanically sensitive components is avoided.
• the drive kinematics have an extinguishing curve profile and a separation curve.
• Ven profile which are arranged on at least one non-rotatably connected to egg ⁇ ner drive shaft of the drive kinematics cam plate, wherein at least one of the contacts of the extinguishing contact assembly is mechanically connected to a clear contact pin, which abuts the extinguishing curve, and at least one of the contacts of the isolating contact assembly mechanically with a Separating contact pin is connected, which abuts the Trennkurvenprofil.
• the drive movements for the isolating contact arrangement and the extinguishing contact arrangement are generated by a single drive.
• the switching order is determined according to the invention on the ⁇ design of at least two curve profiles, which may be formed for example in a single cam.
• Each cam is according to the invention connected to a common drive shaft, via which the drive movement of the common drive is introduced into the cam.
• the cam profiles are in con tact ⁇ bolt guided past which bear on the cam profiles, driven of the respective cam profile due to the rotary movement in dependence on the Pro ⁇ filverlaufs.
• the shape of the extinguishing curve profiles and separation curve profiles is coordinated.
• the erase contact arrangement is therefore designed for switching currents, wherein an arc is drawn between the contact pieces.
• the erase contact arrangement is arranged in a suitable extinguishing medium, such as gas or in a vacuum.
• the contact pieces of the extinguishing contact arrangement are designed to be as solid as possible in order to avoid high losses of material when switching off and also switching on under current with an arc in the wake.
• the isolating contact arrangement opens preferably without power. Is the deflection of the contact pin by the curve profiles over an appropriate kinematic ⁇ example, a rod or lever arrangement, can be introduced into the respective contact assembly.
• the deletion curve profile is formed on a deletion ⁇ cam disk and the separation curve profile on a separating curve ⁇ disc.
• the curve profiles on different cams for example in the form of introduced into the cam grooves may be formed. This simplifies the subsequent assembly of the device.
• the extinguishing contact pin is rigidly connected to a Löschbeweg prominence the extinguishing contact arrangement via a longitudinally movable guided Löschschalt ⁇ rod.
• the extinguishing ⁇ moving contact a stationary extinguishing fixed contact of Löschkon ⁇ pull arrangement in said longitudinal direction is opposite so that by the longitudinal movement of the erasure switching rod a Kon ⁇ maneuver or separation of the contacts the clear contact arrangement is caused.
• the extinguishing switch rod executes a lifting movement
• the extinguishing ⁇ contact arrangement is designed as a stroke switch.
• the isolating contact arrangement has a pivotable switching blade, which is articulated on the extinguishing switch rod.
• the switching blade of the isolating contact arrangement is articulated on a stationary frame of the device, so that the switching movement of the isolating contact arrangement of the switching movement of the extinguishing switch rod is independent and not considered in the quenching curve profile.
• the clear contact arrangement a Vaku ⁇ surrounding housing, into which a vacuum is applied.
• the clear contact assembly is a vacuum interrupter having a fixed contact and extinguishing a longitudinally movable Led ⁇ th LöschbewegType facing each other in the longitudinal direction over.
• the LöschbewegMap is connected via a metal bellows with the housing of the vacuum interrupter verbun ⁇ , so that in this way the necessary tightness of the vacuum housing is provided.
• the isolating contact arrangement has a grounding contact. In this way, enabling the device for performing maintenance or the like is enabled.
• Such earth contacts having isolating contact arrangements are also referred to as a three-position switch.
• Figure 1 is a schematic representation of a
• FIG. 2 shows the device according to FIG. 1 after initiation of the switch-off process
• FIG. 3 shows the device according to FIG. 1 shortly before reaching the switched-off position
• FIG. 4 shows the device according to FIG. 1 in the switched-off position
• FIG. 5 shows the device according to FIG. 4 after initiation of the grounding circuit
• FIG. 6 shows the device according to FIG. 5 shortly before termination of the earthing circuit
• FIG. 7 shows the device according to FIG. 1 in a grounded position.
• FIG. 1 shows an embodiment of the device 1 according to the invention in a schematic representation.
• the device 1 shown has an erase contact arrangement 2, which consists of a fixedly arranged in a vacuum housing 3 erase contact 4 and a delete movement contact 5, which is the erase fixed contact in a longitudinal direction and longitudinally movably guided.
• an erase contact arrangement 2 which consists of a fixedly arranged in a vacuum housing 3 erase contact 4 and a delete movement contact 5, which is the erase fixed contact in a longitudinal direction and longitudinally movably guided.
• the Löschwood ⁇ arrangement 2 is a vacuum interrupter tube, which is well known as such the specialist ⁇ man, so that need not be addressed here at this point.
• the extinguishing movement contact 5 is mounted on a projecting into the vacuum housing 3 in longitudinally movably guided switching rod 6, which has an erase contact pin 7 at its end remote from the deletion contact 5 ⁇ th end.
• the clear contact pin 7 is applied to a quench curve 8, which is realized in the embodiment shown as a boundary of a first groove 9, which is introduced into a cam 10 ⁇ .
• the device 1 furthermore has a disconnect contact arrangement 11, which consists of a stationary isolating fixed contact 12 as consists of a pivotable switch blade 13 which is articulated at a pivot point 14 on the shift rod 6.
• the switch blade 13 is connected to an isolated isolator switch rod 15 which, at its end facing away from the switch blade 13, has a disconnect contact pin 16 which rests against an isolating curve profile 17, which is realized as a boundary of a second groove 19, which is inserted in a cam 20 ,
• the cams 10 and 20 are rotatably connected to a drive shaft 21.
• the device 1 is shown in an on position in which current flows through the separating fixed contact 12, the switch blade 13, the switching rod 6 and the extinguishing ⁇ contact arrangement 2.
• no high voltage potential to be ⁇ is the erasure switching rod 6 in the region between the articulation point 14 and the clear contact pin 7 partially, movement of an electrically non-conductive insulator, however, has a sufficiently high mechanical strength to the Wennbe ⁇ the drive shaft 21 safely into the Löschumbleanord ⁇ tion 2 initiate.
• FIG. 2 shows the device 1 according to FIG. 1 immediately after the start of the switch-off process.
• the on ⁇ was driven shaft 21 is rotated counterclockwise, these are pivoted in the same direction due to the rotationally fixed connection between the drive shaft 21 and the cam plates 20 and 10.
• FIG. Due to the shape of the quench curve profile 8 of the clear contact pin in the longitudinal direction is set so that the LöschbewegCount 5 of the erasing hard ⁇ contact 4 is separated.
• the separating curve profile 17, however, is designed so that the separating contact pin 16 during pivoting of the cam 20 is not driven and the pivot blade 13 thus remains in its closed position.
• the opening of the extinguishing contact arrangement under the flow of current leads to the formation of an arc, which is extinguished in a vacuum at a current zero crossing of the alternating current flowing through the device 1.
• FIG. 3 shows the device 1 according to FIG. 1 in a position shortly before reaching the switched-off position. It can be seen that due to the shape of the Trennkurvenpro ⁇ fils 17 of the cam 20, the switching blade 13 is pivoted relative to its position shown in Figure 1 and is out of contact with the separating stationary contact piece 12. Due to the temporally anticipatory interruption of the current flow through the extinguishing contact arrangement, the isolating contact arrangement opens without current. The transition from the position shown in Figure 2 to the position shown in Figure 3 was brought about by a further pivoting of the drive shaft 21 in the counterclockwise direction.
• any switching speed profiles are reali ⁇ sierbar by the appropriate shaping of the cam profiles in the pivoting of the drive shaft.
• FIG. 4 shows the device 1 in the switched-off position, in which both the contacts of the extinguishing contact arrangement 2 and the contacts of the isolating contact arrangement 11 are separated from one another.
• FIG. 5 shows the device 1 according to FIG. 4 shortly after starting the earthing circuit of the device 1.
• the drive shaft 21 is rotated counterclockwise with respect to FIG. 4, so that due to the shape of the separating curve profile 17, the switching blade 13 turns clockwise to one at earth potential Ground contact 22 is pivoted ⁇ .
• the extinguishing contact arrangement 2 remains in its already occupied and shown in Figure 4 separation position.
• FIG. 6 shows a position of the device 1 during grounding in which the switch blade 13 contacts the grounding contact 22. Due to the open erase contact arrangement, the contact between switch blade 13 and earth contact 22 is de-energized, so that a burnup between the besag ⁇ th contact pieces is avoided.
• Figure 7 shows the device 1 in a fully earthed ⁇ th position in which the Löschbewegmas 4 contacts the extinguishing fixed contact 5, so that a figurative not Darge ⁇ imputed to the clear contact assembly 2 downstream check circuit is also grounded.
• the contacting of the contacts of the extinguishing contact assembly 2 is carried out by further rotation of the drive shaft 21 counterclockwise and by a purposeful shaping of the extinguishing curve profile 8 and the Trennkurvenprofils 17. Is a back ⁇ voltage at the cable outlet and thus at the stationary connection of the vacuum interrupter, takes over the vacuum tube in this switch position, the role of a switch-on earthing.
• the closing of the device 1 is effected by turning the drive shaft 21 in a clockwise direction, wherein the switch positions shown in Figures 1 to 7 are traversed in reverse order.
• the isolating contact arrangement 11 is normally closed, wherein the Löschumbleanord ⁇ voltage is configured resistant to arc. 2

Landscapes

• Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
• Arc-Extinguishing Devices That Are Switches (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=36406018

Family Applications (1)

Country Status (5)

Families Citing this family (17)

Family Cites Families (10)

• 2005
  • 2005-03-18 DE DE200510013231 patent/DE102005013231B3/de not_active Expired - Fee Related
• 2006
  • 2006-03-14 EP EP06725036A patent/EP1859463A1/de not_active Withdrawn
  • 2006-03-14 RU RU2007138644/09A patent/RU2007138644A/ru not_active Application Discontinuation
  • 2006-03-14 CN CNA2006800087973A patent/CN101142648A/zh active Pending
  • 2006-03-14 WO PCT/EP2006/060680 patent/WO2006097457A1/de active Application Filing

Non-Patent Citations (1)

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