EP3039703A2 - Disjoncteur haute tension à isolation gazeuse - Google Patents

Disjoncteur haute tension à isolation gazeuse

Info

Publication number
EP3039703A2
EP3039703A2 EP14747655.0A EP14747655A EP3039703A2 EP 3039703 A2 EP3039703 A2 EP 3039703A2 EP 14747655 A EP14747655 A EP 14747655A EP 3039703 A2 EP3039703 A2 EP 3039703A2
Authority
EP
European Patent Office
Prior art keywords
contact
constriction
flow
flow cross
section
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
EP14747655.0A
Other languages
German (de)
English (en)
Other versions
EP3039703B1 (fr
Inventor
Arthouros Iordanidis
Martin Seeger
Vincent Dousset
Bernardo Galletti
Emmanouil Panousis
Joerg Lehmann
Franceso PISU
Mahesh DHOTRE
Daniel Over
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.)
ABB Schweiz AG
Original Assignee
ABB Technology AG
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 ABB Technology AG filed Critical ABB Technology AG
Publication of EP3039703A2 publication Critical patent/EP3039703A2/fr
Application granted granted Critical
Publication of EP3039703B1 publication Critical patent/EP3039703B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7023—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle
    • H01H33/703—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle having special gas flow directing elements, e.g. grooves, extensions
    • 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
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/38—Plug-and-socket contacts
    • H01H1/385—Contact arrangements for high voltage gas blast circuit breakers
    • 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
    • H01H33/90—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 this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/91—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 this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/302—Means for extinguishing or preventing arc between current-carrying parts wherein arc-extinguishing gas is evolved from stationary parts

Definitions

  • the present invention relates to a gas-insulated
  • the switch of the type mentioned allows in the rated voltage range of about 10 kV up to several hundred kV, such as 123 kV or 365 kV, the shutdown higher, generally up to 63 kA, amounting
  • the switch includes a housing filled with insulating gas and a contact arrangement enclosed in the housing, which has, in coaxial arrangement, two arc contacts which are movable relative to one another along an axis, namely a contact tulip and a contact pin, and two
  • Insulating nozzles which are held in the axial direction at a distance from each other, and of which the first has a longitudinal axis guided along the first flow channel with a first constriction and the second one guided along the axis of the second flow channel having a second constriction.
  • the contact tulip is arranged in a downstream of the first constriction
  • Einschaltposition is the contact pin in an electrically conductive manner in one
  • the two constrictions generally each have a typically smaller internal diameter than the outer diameter of the contact pin.
  • Inner diameter of a constriction of the contact tulip with open switch typically by a few millimeters, so as to reach an inner diameter corresponding to the outer diameter of the contact pin. Therefore, the inner diameter of the contact tulip with open switch several,
  • the contact tulip generally has a ring of contact fingers whose free ends when closed
  • the interrupting a current a switching arc receiving arc zone is limited in the axial direction of the two arcing contacts and in the radial direction of the two insulating nozzles.
  • Switching arc formed in the high-current phase of the current to be disconnected formed arc plasma is approaching the flow to a zero crossing as quenching gas for blowing the switching arc in the arc zone.
  • High voltage switch depends on the density of the quenching gas, i. of pressure and temperature of the extinguishing gas acting in the arc zone. Enter undesirable in this gas when extinguishing the arc
  • a switch of the type mentioned in the introduction is described in EP 1 630 841 B1.
  • This switch has an advantageous for interrupting currents of different size and different behavior design of the insulating nozzle with a cylindrical constriction that is large compared to the diameter.
  • EP 0 836 209 B1 describes a device for interrupting high currents in the
  • This switch contains a switching point and a heating volume.
  • the heating volume is guided coaxially about two Abbrandcardan whatsoeveren the switch point displaceable relative to each other along the axis.
  • the heating volume is connected to the arc zone via a radially oriented channel.
  • the channel is bounded by two axially aligned caps, at least one of which is made of a temperature resistant insulating material.
  • Each cap receives one of two contact tulips of the two consumable contact assemblies.
  • These contact assemblies are electrically connected to each other when the switch is closed via a contact pin displaceable along the axis.
  • a high-voltage switch disclosed in EP 0 228 099 B1 has a largely axially symmetrical arc contact arrangement with a
  • the contact tulip and a contact pin and with two axially spaced from each other with spaced insulating nozzles on.
  • the contact tulip is slotted and has by axially guided slots on separate contact fingers, which form a narrowing of the contact tulip with open switch with their free ends. At the side facing away from the free ends of the contact fingers approach of the slots on the contact tulip openings are provided which during the
  • Disconnect Generate negative pressure in a zone where a switching arc is formed on the contact tulip, and which withdraw heat from this zone.
  • a high voltage circuit breaker is shown with an axially aligned flow channel for axially downwardly feasible extinguishing gas. This channel is bounded radially outward by an unspecified Isolierwhisdüse and a contact tulip 3.
  • the switch further has an annular space which is bounded radially inwardly from the contact tulip 3 and radially outward from the insulating auxiliary nozzle. The annulus begins at the top of the contact tulip and continues to the lower end of the
  • Switch surrounding, electrically insulating opening 1 1 are arranged coaxially.
  • the arc is blown with compressed gas, which is guided in the axial direction through the opening 1 1 down commutes the previously held on the contact 7 foot of the arc to a axially aligned contact pin 8 and is blown to extinction axially with compressed gas.
  • the invention has for its object to provide a gas-insulated high voltage switch of the type mentioned, which is characterized by a good breaking capacity and a high
  • a gas-insulated high-voltage switch of the type mentioned is provided with a insulating gas-filled housing and a housing enclosed in the contact arrangement in coaxial arrangement two along an axis relative to each other movable arcing contacts, one of which is formed as a first contact tulip and a second as a contact pin , As well as two insulating nozzles, which are held in the axial direction at a distance from each other, and of which the first one guided along the axis first Flow channel having a first constriction and the second one guided along the axis of the second flow channel having a second constriction.
  • the first contact tulip is arranged in a downstream of the first constriction arranged outflow portion of the first flow channel, the contact pin is retracted in the on position in a contact pin electrically contacting the constriction of the first contact tulip and is the
  • Extinguish extinguishing gas flows of which the first through the first and the second through the second flow channel is feasible.
  • the sum of the flow cross sections of the constriction of the contact tulip, a third constriction arranged in the outflow section and / or a bypass channel branching off at the outflow section is greater than that
  • a high flow velocity of the first extinguishing gas flow is achieved downstream of the constriction of the first insulating nozzle.
  • the first contact tulip of the switch according to the invention has a collar of axially aligned contact fingers guided symmetrically about the axis
  • (A) is a flow cross-section of a guided around the axis, radially outwardly aligned annular gap which is axially bounded by an annular, extending from the first constriction radially outwardly extending surface of the first Isolierdüse and one of the first constriction facing, slotted executed end of the first Contact tulip,
  • Gas outlet which is arranged at a remote from the slit-shaped end portion of the first contact tulip.
  • the flow cross section according to (d) is advantageously larger than the sum of the flow cross sections according to (c) and according to (e).
  • the pressure and thus the density of the extinguishing gas when switching off in the space loaded with strong electric fields between the lateral surface of the first contact tulip and the first Insulating nozzle relative to the pressure and the density of the located in the interior of the first contact tulip extinguishing gas comparatively high.
  • the dielectric strength of the switch and thus the switching capacity and the reliability of the switch are additionally increased when you turn off.
  • the bypass channel can be replaced by a
  • Blocking device to be guided, which prevents the formation of the second partial flow in the bypass channel at the beginning of switching off. It is so in the
  • High-current phase of the construction of a desirably high gas pressure in a pressure chamber of the switch favors.
  • Narrowing directed parallel to the first partial flow the remaining part of the second quenching gas flow receiving second partial flow is feasible.
  • Gas outlet which is arranged at a remote from the slit-formed end portion of the second contact tulip.
  • the flow cross-section according to (d ') can be greater than the sum of the flow cross sections according to (c') and to (e ').
  • the second constriction along the axis may be cylindrical and have a diameter which is smaller than its axial extent.
  • Base points of the switching arc is mirror-symmetrical, can
  • the switch can also be provided with an outer shield, which is guided around the second insulating nozzle in the area of the outflow channel in an annular manner and, above all, the control of the electric field in the area of critical
  • the first contact tulip may be attached to an end of a hollow contact carrier guided into the first flow channel
  • Contact carrier to be formed a connecting channel, and may be connected from the first insulating nozzle to the outside and from the first contact tulip inwardly, annularly guided around the axis part volume of the first flow channel via the connecting channel with the interior of the contact carrier.
  • the first contact tulip and the first insulating nozzle may each be formed as a commercially available, standardized component.
  • the contact carrier in a coaxial arrangement an inner tube and an outer sleeve, which carries the first insulating, having a guided through the sleeve first portion of the connecting channel may contain at least two parallel-connected sub-channels and may be a second portion of the connecting channel be guided the wall of the pipe.
  • the contact carrier may further comprise a screw for fixing the sleeve on the tube and an annular guided around the axis groove, which connects the first and the second portion of the connecting channel with each other.
  • the sleeve may be integrally formed and set one end of the first contact tulip with a force applied by the screw clamping force on an end face of the tube.
  • the sleeve may comprise two sleeve parts interconnected by axially guided screws, and both sleeve parts may have one end of the first
  • FIG. 1 shows a plan view of an axially guided section through a lying above an axis part of a first simplified view
  • FIG. 2 shows a top view, guided from the right in the direction of the axis, of an arc contact of the contact tulip
  • FIG. 3 is a plan view of the contact tulip according to Fig.2,
  • Figures 4 resp. 5 is a plan view of an axially guided section through a lying above the axis part of a greatly simplified illustrated second resp. third embodiment of the
  • Figures 6 and 7 are each a plan view of an axially guided section through a lying above the axis part of a fourth embodiment of the high voltage switch according to the invention when closed
  • Figures 8 and 9 are each a plan view of an axially guided section through
  • High-voltage circuit breaker are constructed with respect to an axis A substantially axially symmetrical and each contain only in the embodiments according to Figures 1, 6 and 7 shown metal or electrically insulating housing 10, which with a compressed insulating gas, typically based on sulfur hexafluoride, Nitrogen, carbon dioxide, air or mixtures of these gases with each other, is filled.
  • the housing accommodates a contact arrangement in coaxial arrangement two
  • Arc contacts 20 and 30 and two insulating nozzles 40 and 50 includes and a pressure chamber 60 shown only in Figures 1, 6 and 7 for
  • the arc contact 20 is designed as a contact tulip and is integrated in one end of a metal contact carrier, not shown, designed as a tube.
  • the arcing contact 30 is designed as a contact pin aligned along the axis A.
  • the contact fingers 21 each have a free end 22, which rests resiliently on one end 31 of the contact pin 30 when the switch is closed (see Fig. 6) to form contact force, and upon opening of the switch after disconnecting the two contacts 20, 30 inside springs, whereby the contact finger ring forms a constriction of the contact tulip 20 with a flow cross-section ⁇ .
  • the contact fingers 21 are held by axially extending slots 23 from each other at a distance in the wreath. Through the slots 23, a flow cross section A s , ax apparent from FIG. 2 is formed for a gas flowing axially against the crown of the contact fingers 21 and a flow cross section A s , rad for a ring radially inward from the outside inward ,
  • the contact tulip 20 and the contact pin 30 are formed of a material having a high spring force at the same time high electrical conductivity, such as typically a copper-chromium-zirconium alloy.
  • the ends 22 of the contact fingers resp. the end 31 of the contact pin is formed of a resistant to the action of switching arcs, electrically conductive material, such as typically a tungsten-copper alloy.
  • the contact tulip 20, the two insulating nozzles 40 and 50 and the pressure chamber 60 are part of a unit B, by a switch drive D in the direction of Axis A is displaceable to the right or to the left.
  • the contact pin 30 is part of a second unit C, which may be fixed or to allow for an opposite double movement of the two units but also movable. As can be seen from Figures 1, 4 to 7, two are each other
  • the heating channel 62 is shown only in Figures 1, 6 and 7 and connects the pressure chamber 60 when turned off with a at the beginning of
  • the two insulating nozzles 40 and 50 contain in opposite directions along the axis A guided respectively at the mouth portion 61 attached flow channel 41, respectively. 51.
  • An annular constriction 42 forms a minimum flow cross section An of the flow channel 41.
  • a cylindrical constriction 52 forms a minimum flow cross section An 'of the flow channel 51.
  • the two insulating nozzles 40 and 50 are made of a material which gives off the action of a switching arc S quenching gas, in particular polytetrafluoroethylene (PTFE).
  • PTFE polytetrafluoroethylene
  • the contact tulip 20 downstream of the constriction 42 in the outflow portion 43 of the flow channel 41 is arranged.
  • the pressure chamber 60 shown only in the two figures 1, 6 and 7 is designed as a heating volume.
  • the heating volume stores when opening the switch compressed quenching gas, which in a high current phase to
  • Switching arc S is generated and which at the current zero crossing of the Pressure chamber 60 via the heating channel 62 in opposite directions in the two flow channels 41, 51 flows.
  • the heating volume may be connected via a control valve to a compression space of a controlled by the stroke of the unit B piston-cylinder compression device of the pressure chamber 60.
  • the heating volume can also be integrated into the compression space of the stroke of the unit B controlled piston-cylinder compression device to form the pressure chamber 60.
  • the contact tulip 20 and the contact pin 30 are permanently connected to one of the two electrical connections of the switch. In these embodiments, therefore, with the contact assembly closed, the switch conducts current flowing in a circuit extending from one of the two power terminals of the switch via the contact tulip 20 and the contact pin 30 to the other of the two power terminals of the circuit
  • the assembly B is moved by the drive D to the left.
  • the contact tulip 20 and the contact pin 30 separate from each other to form a bounded by the ends 22 of the contact fingers 21 and the end 31 of the contact pin 30 separating line and is drawn on the ends 22, 31, from Fig.1 apparent switching arc S pulled.
  • This switching arc is located in the through the constrictions 42 and 52 radially and axially limited by the contact tulip 20 and the contact pin 30
  • Arcing space L and generates thereby by interaction with the
  • Insulating material of the nozzles 40 and 50 compressed arc plasma Insulating material of the nozzles 40 and 50 compressed arc plasma.
  • Arc zone L generally higher than that in heating volume
  • Extinguishing gas flows Li and L 2 become effective flow cross sections in the outflow sections 43, 53 are suitably dimensioned.
  • the contact tulip 20 is disposed downstream of the constriction 42.
  • the sum of the flow cross-section ⁇ of the constriction of the contact tulip 20 and a subsequently defined flow cross-section ⁇ should be greater than that Flow cross-section At the constriction 42 of the insulating 40th is the
  • Extinguishing gas flow Li receiving partial flow L 12 out. It is thus achieved downstream of the constriction 42 before the formation of the two partial flows a high flow velocity of the quenching gas flow Li. This leads to a rapid and efficient discharge of the arc plasma located upstream of the contact tulip 20 and improves the dielectric
  • the distance between the stagnation point SP and the contact tulip 20 may advantageously be in the range between 15 to 35 mm, without the
  • the flow cross section ⁇ of the further constriction can be formed by at least two of the flow cross sections listed below:
  • (A) has a flow cross-section Ai of a guided radially outwardly aligned annular gap around the axis A, which is axially bounded by a
  • Forming contact fingers 21, (d) a flow cross-section A2 of an axially-aligned annular gap guided about the axis A bounded radially inwardly of the slotted end of the contact tulip 20 and radially outwardly of the insulating nozzle 40, and (e) a flow area A3, one um the axis A guided, annular
  • Gas outlet which is arranged at a remote from the slit-shaped end portion of the contact tulip 20.
  • the gas outlet can be formed by axially aligned material recesses, which are typically banana or circular disk-shaped and are generally arranged between the insulating nozzle 40 and the contact tulip 20, and / or radially aligned through the contact tulip 20 from the outside inwardly guided passages.
  • the unslotted end of the contact tulip 20 sits without gaps on the insulating nozzle 40. Therefore, the flow cross section ⁇ of the further constriction is determined by the flow cross sections A1, A s , ax, and As.rad.
  • the unslotted end of the contact tulip 20 is spaced from the insulating nozzle 40 by the gas outlet having the flow area A3.
  • the flow cross section ⁇ of the further constriction is determined by the flow cross sections A s , ax, As.rad and A3, if A3 is smaller than A2.
  • the flow cross section A2 of the axially aligned annular space is greater than the sum of the flow cross sections As.rad + A3.
  • the pressure of the extinguishing gas outside the contact tulip 20 can be kept comparatively high in a dielectrically advantageous manner.
  • the insulating nozzle 40 accommodates a bypass channel 44, in which the partial flow L 12 directed parallel to the partial flow l_n and carrying the remaining part of the extinguishing gas flow Li is guided.
  • Partial flow L 12 is guided by a blocking device 45, which the
  • Contact tulip 80 is arranged in the outflow section 53 and is analogous to
  • the contact tulip 80 constructed.
  • the contact tulip 80 has a collar guided concentrically about the axis A, arranged largely parallel to the axis
  • the contact fingers 81 each contain a free end 82 which rests resiliently on the lateral surface of the contact pin 30 when the switch is closed (see FIG. Upon opening the switch feathers after separating the two contacts 30, 80, the ends 82 inwardly, whereby the contact finger ring forms a constriction of the contact tulip 80 with a flow cross-section ⁇ ' ⁇ .
  • the contact fingers 81 are held by axially extending slots 83 from each other at a distance in the garland. Through the slots 83 is analogous to the contact tulip 20, a flow cross-section A s.
  • the contact pin 30 therefore bridges in the switch-on one of the axial distance between the two contact tulips 20 and 80 certain separation distance whose dielectric strength after the
  • Extinguishing the switching arc S is sufficient to keep the recurring voltage, even in the case of particularly critical switching operations, such as the interruption of a capacitive current or a heavy short-circuit current or when switching off in phase opposition, without re-ignition.
  • the assembly B is moved by the drive D to the left.
  • the contact tulip 20 and the contact pin 30 separate from each other and according to the embodiments described above of the inventive switch a drawn on the ends 22 of the contact fingers 21 and the end 31 of the contact pin 30 switching arc S pulled.
  • This switching arc is located in the first through the constrictions 42 and 52 radially and axially by the contact tulip 20 and the contact pin 30 arc space L, thereby generating by interaction with the insulating material of the nozzle 40 compressed arc plasma.
  • This plasma is first passed through the contact tulip 20 in the enclosed by the housing 1 0 exhaust space 1 1.
  • the contact pin 30 also releases the constriction of the contact tulip 80, which is determined by the arc-fixed ends 82 of the now radially inwardly spring-loaded contact fingers 81.
  • the base of the switching arc S held on the free end 31 of the contact pin 30 is transmitted to the ends 82 of the contact fingers 81, so that the current to be disconnected now flows in a circuit determined by the two contact tulips 20, 80 and the switching arc.
  • a part of the arc plasma now flows through the constriction of the contact tulip 80 having a flow cross-section A'k into the exhaust space 11.
  • interrupted power is interrupted.
  • the contact tulip 80 is disposed downstream of the constriction 52.
  • the sum of the flow cross-section ⁇ ' ⁇ of the constriction of the contact tulip 80 and a subsequently defined flow cross-section ⁇ ' ⁇ should be greater than that
  • Flow cross-section ⁇ ' ⁇ is the flow cross-section of another im
  • Outflow section 53 of the flow channel 51 arranged constriction. Due to the constriction of the contact tulip 80 is a partial flow L21 of
  • Partial flow L21 directed, the remaining part of the quenching gas flow L2 receiving partial flow L 22 out. It is so downstream of the constriction 52 even before the formation of the two partial flows L21 and L22 a high
  • the flow cross section ⁇ ' ⁇ the further constriction may be formed by at least two of the flow cross sections listed below:
  • the gas outlet can be formed by axially aligned material recesses, which are typically banana or circular disk-shaped and generally arranged between the insulating nozzle 50 and the contact tulip 80, and / or by radially oriented passages guided through the contact tulip 80 from the outside to the inside.
  • the pressure of the quenching gas outside the contact tulip 80 can be kept relatively high in a dielectrically advantageous manner. If the flow cross-section ⁇ ' ⁇ of the contact tulip 80 is selected smaller than the flow cross-section A ' 4 of an annular channel formed between the contact tulip 80 and the contact pin 30 after release of the constriction of the contact tulip 80, then it is ensured that the arc plasma continues rapidly out of the
  • Arc zone L is transported in dielectrically uncritical areas.
  • the shield 70 is guided in the region of the Abströmabitess 53 annularly around the insulating nozzle 50 and serves mainly the control of the electric field in the region of critical triple points, which are in particular in the region of the arc-fixed ends 82 of the contact fingers 81, and the shield of the contact tulip 80 acting electric field.
  • the dielectric reconsolidation of the separation distance and thus the switching capacity of the inventive switch according to Figures 6 and 7 is improved.
  • the pressure build-up in a further shutdown process only decreases in a permissible manner.
  • the contact tulip 80 indeed has a negligible material erosion relative to the insulating nozzle 50 and thus ensures the same
  • the contact tulip 20 is connected to a hollow end in a flow channel 41 of the insulating nozzle 40
  • a partial volume 46 of the flow channel 41 of the insulating nozzle 40 is connected via the connecting channel 91 with the interior of the hollow contact carrier 90.
  • the contact carrier 90 has an inner tube 92 and an outer sleeve 93 in a coaxial arrangement.
  • the sleeve carries the insulating nozzle 40, which is obviously inserted positively with a remote from the constriction 42 foot end in one end of the sleeve 93.
  • a guided in the sleeve 93 section 91 a of the connecting channel 91 includes at least two mutually parallel and circumferentially uniform around the axis A distributed sub-channels 91 a '. These sub-channels connect the sub-volume 46 with a ring 94 guided around the axis A groove 94, which also forms a portion of the connecting channel 91.
  • Connecting channel 91 has a plurality of the wall of the tube 12 through openings and connects the interior of the tube 92 with the annular groove 94 and thus also the interior of the tube 92 via the annular groove 94 and the partial channels 91 a 'with the partial volume 46.
  • the contact carrier 90 has furthermore one
  • Screw on 95 which sets the sleeve 93 on the tube 92.
  • the connecting channel 91 serves to guide at least part of the
  • Extinguishing gas flow L12 If the sum of the flow cross-sections of the bottleneck of the contact tulip 20, the connecting channel 91 and the slots 23 between the optionally present contact fingers 21 (cf., for example, Figures 2 and 3) is greater than the flow cross-section of the constriction 42 of the insulating nozzle 40, the quenching gas flow Li in the downstream of the constriction 42 subsequent Abströmabites 43 of the flow channel 41 greatly accelerated and can exceed the sound velocity of the quenching gas very much depending on the duration and size of the current to be disconnected. In the region of a zero crossing of the current to be disconnected, the strongly accelerated extinguishing gas causes a considerable improvement in the dielectric strength and thus also in the thermal switching capacity of the switch.
  • the extinguishing gas flow L12 is guided from the partial volume 46 through the connecting channel 91 formed in the contact carrier 90 into the interior of the contact carrier 90 and thus into the exhaust space. It therefore eliminates the mechanical strength of the contact arrangement impairing structural measures, such as guided in the insulating 40 bypass channel 44 or as through holes in the contact tulip 20th
  • the sleeve 93 is integrally formed and is a non-slotted formed end of the contact tulip 20 with one of the screw 95 applied and transmitted from the sleeve 93
  • the sleeve 93 has two sleeve parts 93a and 93b connected to one another by means of axially guided screws 96 (shown only in FIG. 10).
  • the sleeve part 93 a protrudes to the right beyond the foot end of the contact tulip 20.
  • the protruding portion of the sleeve portion 93a and the insulating nozzle 40 limit the partial volume 46 radially outward.
  • a part of the channel portion 91 a is formed, which contains a first portion of the parallel part channels 91 a '.
  • a radially outward-pointing outlet formed in the projecting portion of the sleeve 93 guides the extinguishing gas flow L12 from the partial volume 46 into the channel portion 91a.
  • a part of the channel portion 91 a is formed, which contains the annular groove 94 and a second portion of the parallel part channels 91 a '.
  • the sleeve part 93 b is using the
  • Screw 95 is attached to the tube 92 of the contact carrier 90.
  • connection channel 91 91 a, 91 b sections of the connection channel 91
  • connection channel 91 a 'sub-channels of the connection channel 91

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  • Circuit Breakers (AREA)

Abstract

Disjoncteur haute tension à isolation gazeuse qui contient un bloc de contact enfermé dans un boîtier (10) et comprenant deux contacts d'arc disposés de manière coaxiale et mobiles l'un par rapport à l'autre le long d'un axe (A), à savoir une tulipe de contact (20) avec un rétrécissement et une broche de contact (30), ainsi que deux douilles isolantes (40, 50) qui sont retenues dans la direction axiale à un certain écart l'une de l'autre. Une première (40) des deux douilles isolantes comporte un premier canal d'écoulement (41) orienté le long de l'axe et pourvu d'un premier rétrécissement (42), et la seconde (50) comporte un second canal d'écoulement (51) orienté le long de l'axe et pourvu d'un second rétrécissement (52). Dans ce disjoncteur, la tulipe de contact (20) est située dans un segment d'écoulement (43) du premier canal d'écoulement (41), se trouvant en aval du premier rétrécissement (42). La somme des sections transversales d'écoulement (Ακ, ΑΣ) du rétrécissement de la tulipe de contact (20) et d'un troisième rétrécissement situé dans le segment d'écoulement (43), est supérieure à la section transversale (An) du premier rétrécissement (42), un premier flux partiel (L11) d'un flux de gaz d'extinction (L1) étant guidé dans le rétrécissement de la tulipe de contact (20) et un second flux partiel (L12) orienté parallèlement au premier flux partiel (L11), étant guidé dans le troisième rétrécissement. Le rétablissement de la rigidité diélectrique d'un espace intercontact se trouvant dans la zone d'arc (L) en amont de la tulipe de contact (20), s'en trouve ainsi améliorée, et le pouvoir de coupure et la sécurité de fonctionnement du disjoncteur sont augmentées.
EP14747655.0A 2013-08-28 2014-08-05 Disjoncteur haute tension à isolation gazeuse Active EP3039703B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102013109336 2013-08-28
DE102014105392 2014-04-15
PCT/EP2014/066797 WO2015028264A2 (fr) 2013-08-28 2014-08-05 Disjoncteur haute tension à isolation gazeuse

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EP3039703A2 true EP3039703A2 (fr) 2016-07-06
EP3039703B1 EP3039703B1 (fr) 2018-05-02

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Publication number Priority date Publication date Assignee Title
DE202015106610U1 (de) 2015-12-04 2016-01-11 Abb Technology Ag Kontakttulpe für einen gasisolierten Hochspannungsschalter und Hochspannungsschalter mit dieser Kontakttulpe

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Publication number Priority date Publication date Assignee Title
US4393291A (en) * 1979-10-12 1983-07-12 Brush Switchgear Limited Gas blast interrupters
FR2596575B1 (fr) * 1986-03-26 1988-05-20 Alsthom Disjoncteur a gaz dielectrique sous pression
DE10226044A1 (de) * 2002-06-12 2003-12-24 Alstom Druckgasschalter
CN101828242B (zh) * 2007-10-16 2013-03-13 Abb研究有限公司 带有由溢流阀控制的减压通道的气体绝缘的高压功率开关

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Title
See references of WO2015028264A3 *

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WO2015028264A3 (fr) 2015-06-11
EP3039703B1 (fr) 2018-05-02
WO2015028264A2 (fr) 2015-03-05

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