EP3073504A1 - Unterbrechungsschalter für ein dreiphasennetz - Google Patents

Unterbrechungsschalter für ein dreiphasennetz Download PDF

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Publication number
EP3073504A1
EP3073504A1 EP16162153.7A EP16162153A EP3073504A1 EP 3073504 A1 EP3073504 A1 EP 3073504A1 EP 16162153 A EP16162153 A EP 16162153A EP 3073504 A1 EP3073504 A1 EP 3073504A1
Authority
EP
European Patent Office
Prior art keywords
disconnector
switch
phase
conductor
conductive
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
EP16162153.7A
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English (en)
French (fr)
Other versions
EP3073504B1 (de
Inventor
Christophe Preve
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.)
Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Publication date
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Publication of EP3073504A1 publication Critical patent/EP3073504A1/de
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Publication of EP3073504B1 publication Critical patent/EP3073504B1/de
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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
    • H01H33/60—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

Definitions

  • the subject of the invention is a switch of a three-phase network.
  • the switches referred to here are designed for high and medium voltage, typically from 1 kV to 52 kV, and are normally equipped, in addition to a disconnecting function ensuring the physical disconnection of the conductors, breaking chambers allowing extinguish the electric arcs, thus achieving the switch function.
  • Cutoff chambers frequently include vacuum bulbs.
  • EP 2 182 536 A Among the many existing devices, mention will be made of the documents EP 2 182 536 A , EP 2 479 769 A , WO2014 / 001029A , WO2013 / 110511A which offer savings prospects on the cost of the switch, by placing the vacuum bulb not on the driver itself, but on a bypass, usually without current flowing, so that the vacuum interrupter is not requested in normal service.
  • the disconnector intercepts, during its disconnection stroke, a free end of the branch and moves it.
  • the object of the invention is to obtain more economical switches in the case of a three-phase network to the undistributed neutral, by exploiting one of their properties, according to which, when the disconnection of two phases is accomplished, only a capacitive current, of low intensity, circulates in the third phase.
  • the invention relates to a switch of a three-phase network, the switch comprising, for two phases of the network, a conductor equipped with a disconnector and a breaking chamber to extinguish currents of arc through the conductors of these two phases after a disconnection operated by said disconnectors, and, for a third phase of the network, a conductor equipped with a disconnector and a cut-off device, characterized in that said device, designed to cut capacitive current arcs, comprises an electrically conductive pallet whose disconnector separates, during disconnection, only to a state of the switch where the breaking chambers have cut the arc currents for the other phases.
  • a vacuum bulb is not necessary to extinguish the arc generated by the capacitive current when the other phases have already interrupted the current. It can therefore be omitted for the third phase, which simplifies the switch and makes it much less expensive.
  • the conductive pallet is a conductive continuous shunt of electricity of a conductor of the third phase between a fixed end connected to a length of said conductor, the disconnector of the third phase separates during disconnections , and a free end that said disconnector of the third phase reaches during disconnections and from which it separates after being separated from said length of said conductor; and the conductive pallet may comprise either a wire or a bar connected to the fixed end, and a fixed switch tab extending to said free end.
  • the figure 1 schematically represents a three-phase undistributed neutral network provided with a switch 1 according to the invention.
  • Each of the conductors 2, 3 and 4 of the network may be interrupted by a respective disconnector 5 ", 5 'or 5 consisting of a movable knife adapted to separate from one of the lengths 2a, 3a or 4a of the conductor 2, 3 and 4
  • the three disconnectors 5 ", 5 ', 5 are moved by a common control device 6 which synchronizes their movements.
  • the conductors 2 and 3 further comprise a breaking chamber 7 associated with their 5 'or 5 "disconnector and which makes it possible to extinguish the electric arcs remaining after the disconnection
  • the third conductor 4 does not is not provided.
  • each disconnector 5 ", 5 ', 5 could be moved by a specific control device for each phase, these three control devices then being synchronized by electronic means of the switch 1 .
  • the breaking chamber 7 comprises a vacuum bulb 8 installed on a branch of the length 2a or 3a of the conductor 2 or 3, this branch passing through the fixed contact 9 of the vacuum bottle 8, a rod 10 passing through the envelope of the vacuum bottle 8 and carrying the moving contact of the vacuum bottle 8, and a rocker 11 articulated to the rod 10 and ending on a free end 12
  • the 5 'or 5 "disconnector has its own end articulated by a pivot 13 to the length 2b or 3b by establishing a mechanical and electrical connection, and it is in frictional contact with the complementary length 2a or 3a of said conductor 2 or 3.
  • the free end 12 comprises a conductive layer 14 one face directed towards the disconnector 5 'or 5 "in the state that is represented at the figure 2 , and an insulating layer 15 at an opposite face. Finally, a spring 16 recalls the rocker 11 to a closed state of the vacuum bulb 8.
  • the switch 5 'or 5 In successive steps of opening of the switch 1, the switch 5 'or 5 "is moved to the left of the Figures 2 to 5 , and comes to touch the conductive layer 14 while remaining connected at first to the length 2a or 3a ( figure 3 ). Once the contact with the conductive layer 14 has been established, the disconnector 5 'or 5 "leaves the length 2a or 3a, then it tilts the pendulum 11, pulling the rod 10 and opening the vacuum bulb 8 ( figure 4 ); finally, the disconnector 5 'or 5 "protrudes from the free end 12, allowing the rocker 11 to come back under the action of the spring 16 ( figure 5 ).
  • the stage of figure 2 corresponds to the normal operation of the network, the switch 1 being closed and the conductors 2 and 3 being uninterrupted, the figure 3 the gradual transition of the current by the diversion, the figure 4 when the current is cut off and the arc is extinguished in the vacuum bulb 8, and the figure 5 in the fully open state of the switch 1 and the disconnection of the conductor 2 or 3.
  • the 5 'or 5 "disconnector When a reconnection is made, the 5 'or 5 "disconnector returns to the position of the figure 2 rocking the rocker 11 in the other direction by sliding on the insulating layer 15, which prevents early reconnection of the bypass through the vacuum bulb 8. On the contrary, the reconnection occurs only when the disconnector 5 'or 5 " returns to touch the length 2a or 3a, the vacuum bulb 8 remains at rest as there is no other opening movement.
  • FIG. 6 and 7 One embodiment of the interruption device for the third phase is shown in Figures 6 and 7 .
  • the device may have similarities in size and composition with those of the other two phases, although it is simplified because there is no vacuum bulb.
  • Figures 2 to 5 the third conductor 4 may for example include lengths 4a and 4b of the same arrangement as those of other conductors 2 and 3.
  • the interrupting chamber 7 is replaced by a conductive pallet 17 unitary and fixed. More precisely, in this embodiment, the conductive pallet 17 is a bypass of the conductor 4 whose shape and extension are similar to those of the branches of the breaking chambers 7.
  • This derivation is here however a static conductor which comprises a bar 18 at the location of the vacuum bulb 8 of the other phases, and a switching tab 19 at the location of the rocker 11.
  • the bar 18, as well as the switching tab 19, may be copper or copper. aluminum.
  • the bar 18 connects the switching tab to the length 4a.
  • a free end 20 of the switch tab 19 arrives at the disconnector 5.
  • the bar 18 and the switch tab 19 are rigid.
  • the disconnector 5 During its disconnection movement, the disconnector 5 reaches the free end 20, rubs on it and moves as previously the current progressively from the main portion of the conductor 4 to the branch formed by the conductive paddle 17, separates from the main portion , and then separates from the conductive pallet 17 in the state of the figure 7 , corresponding to that of the figure 5 , when the disconnector 5 has left the free end 20 of the switch tab 19. At this time, the current flowing through the conductor 4 is completely cut off.
  • the common control device 6 drives the three disconnectors 5, 5 'and 5 "which come to touch the conductive end of their respective branch (the vacuum bottle 8 and the rocker 11, or the conductive pallet 17) Then the disconnectors of the first two phases (5 'and 5 ") opening their vacuum interrupter 8, as explained above.
  • the three disconnectors 5, 5 'and 5 are always connected to their respective bypass.Once the empty bulbs 8 of the two first open phases, the disconnectors 5, 5' and 5 "of the three phases emerge from their respective bypass so as to completely open the switch 1.
  • the arrangement of the conductive pallet 17 of the third phase bypass must be designed to allow the separation between the conductive pallet 17 and the disconnector 5 to occur only at a state of the switch 1 where the chambers cutoff 7 of the other two phases cut the arc currents occurring in the vacuum bulbs 8, that is to say after the opening of these vacuum bulbs 8 and the passage through a zero current to turn off the bow. Indeed, when the arcs in the breaking chambers 7 of the two phases are extinguished, the current that can remain in the third conductor 4 is then a capacitive current of low intensity, of the order of 1 A / km for cables and 20 mA / km for overhead lines.
  • the cables considered may be a few kilometers in length, and the airlines a few tens of kilometers, the capacitive current will be of the order of a few amperes.
  • the separation between the disconnector 5 and the length 4a of the conductor 4 would occur, in the absence of any cut-off device, while the current is still at its nominal intensity, of 630 A for example, which would give an arc high energy that would make it impossible to perform the cut.
  • the third conductor 4 comprises the conductive pallet 17 to extend the connection time until, the current being cut in the other conductors 2 and 3 by the opening of the vacuum bulbs 8, the intensity of the current has decreased in the third conductor 4, tending towards the capacitive current value: the disconnector 5 can then separate from the conductive pallet 17, since the arc produced is of low power and extinguishes itself.
  • the invention is applicable with many variations. It is first possible that conductors 2 and 3 are equipped with break chambers of a different kind from those Figures 2 to 5 .
  • the gas in which bathe the switch 1 can be any.
  • the conductive pallet used for the third conductor 4 can also be of any kind, provided that it allows the connection to be extended for a time sufficient to assist in the weakening of the residual current in the conductor 4, after the extinction of the arcs.
  • the invention can also be implemented with disconnectors 5, 5 'and 5 "in the form of knives movable in translation rather than rotating.
  • FIG. 8 and 9 A quite different realization of aspect of the previous one, although of the same operation, is thus represented with Figures 8 and 9 , which correspond respectively to Figures 6 and 7 from the previous realization.
  • the conductive pallet 17 of the third phase composed here of a bypass of the third conductor 4, is replaced here by a conductive pallet 22 in the form of a tab extending laterally from the end of the length 4a, obliquely or in an arc of circle, in the direction of the movement of the disconnector 5 to open the switch.
  • the electric current passes through the entire length 4a, and also passes in the conductive pallet 22 at the beginning of the opening of the switch, since the end of the disconnector 5 rubs on it.
  • This simple embodiment has the advantage of not requiring derivation for the third phase.
  • FIG. 10 Another variant of the third phase is also represented in figure 10 . Its operation is similar to that of the achievements shown in Figures 6 to 9 , but this variant has the advantage of having a structure close to the structures of the two other phases presented to the Figures 2 to 5 .
  • the conductive pallet of the third phase comprises a bypass comprising a balance 11a articulated to a rod 10a and ending on a free end 12 of the branch.
  • the rod 10a is of course not connected to a vacuum bulb but fixed and directly connected to the conductor 4a.
  • the free end 12 comprises a conductive layer 14 on one side facing the disconnector 5 and an insulating layer 15 on an opposite side.
  • the disconnector 5 comes to touch the conductive layer 14 while remaining connected at first to the length 4a. Once the contact with the conductive layer 14 has been established, the disconnector 5 leaves the length 4a. Then, the disconnector 5 tilts the balance 11a and finally beyond the free end 12, leaving the balance 11a back into place under the action of a spring.
  • This movement of the disconnector 5 is synchronized with the movements of the disconnectors 5 'and 5 "of the other two phases, so that when the disconnector 5 leaves the free end 12 of the branch, the vacuum ampoules 8 of the other two phases will already be open and the corresponding arcs are off.
  • each of the three disconnectors 5 ", 5 ', 5 is controlled by a own control device, these three control devices being controlled and synchronized by electronic means
  • the invention provides that said electronic means are able to delay the opening order of the disconnector 5 of the third phase devoid of vacuum bulb with respect to the opening order of the disconnectors 5 "and 5 'of the first two phases.
  • the opening of the third phase will only be controlled after the moment when the breaking chambers 7 of the two other phases have already cut off the arc currents occurring in the vacuum interrupters 8.

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP16162153.7A 2015-03-27 2016-03-24 Unterbrechungsschalter für ein dreiphasennetz Active EP3073504B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1552624A FR3034251B1 (fr) 2015-03-27 2015-03-27 Interrupteur d'un reseau triphase

Publications (2)

Publication Number Publication Date
EP3073504A1 true EP3073504A1 (de) 2016-09-28
EP3073504B1 EP3073504B1 (de) 2018-11-07

Family

ID=53776720

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16162153.7A Active EP3073504B1 (de) 2015-03-27 2016-03-24 Unterbrechungsschalter für ein dreiphasennetz

Country Status (4)

Country Link
EP (1) EP3073504B1 (de)
CN (1) CN106206147B (de)
ES (1) ES2709670T3 (de)
FR (1) FR3034251B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3060195A1 (fr) * 2016-12-14 2018-06-15 Schneider Electric Industries Sas Appareil de connexion electrique a derivation de coupure d'arc, et procede d'ouverture de cet appareil
US10818452B1 (en) 2018-08-30 2020-10-27 Robert Neal Hendrix Power outage isolation device
ES2888700A1 (es) * 2020-06-25 2022-01-05 Ormazabal Corporate Tech A I E Interruptor de corte en carga o de corrientes de cortocircuito

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006074975A1 (de) * 2005-01-13 2006-07-20 Siemens Aktiengesellschaft Dreistellungsschalter mit kurvenscheibe
EP2182536A1 (de) 2008-10-29 2010-05-05 Areva T&D Sas Stromunterbrechungsschalter in einer Stromleitung, die eine Vakuumlampe umfasst
EP2479769A1 (de) 2011-01-25 2012-07-25 Schneider Electric Industries SAS Mittelspannungs-Abschaltungsvorrichtung einschließlich einer Vakuumlampe
WO2013110511A1 (de) 2012-01-24 2013-08-01 Siemens Aktiengesellschaft Schaltgerät, insbesondere lasttrennschalter, für mittelspannungs-schaltanlagen
WO2014001029A1 (de) 2012-06-25 2014-01-03 Siemens Aktiengesellschaft Dreistellungslasttrennschalter für mittelspannungs-schaltanlagen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19913059C2 (de) * 1999-03-17 2001-02-15 Siemens Ag Hochspannungsleistungsschalter, insbesondere in dreipoliger Ausführung
FR2831342B1 (fr) * 2001-10-22 2003-12-19 Alstom Systeme de protection d'un transformateur de distribution triphase a isolation dans un dielectrique liquide comportant un interrupteur sectionneur de phase
FR3009643B1 (fr) * 2013-08-09 2015-08-07 Schneider Electric Ind Sas Ampoule a vide, pole de disjoncteur comprenant une telle ampoule a vide et procedes de fabrication de tels dispositifs

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006074975A1 (de) * 2005-01-13 2006-07-20 Siemens Aktiengesellschaft Dreistellungsschalter mit kurvenscheibe
EP2182536A1 (de) 2008-10-29 2010-05-05 Areva T&D Sas Stromunterbrechungsschalter in einer Stromleitung, die eine Vakuumlampe umfasst
EP2479769A1 (de) 2011-01-25 2012-07-25 Schneider Electric Industries SAS Mittelspannungs-Abschaltungsvorrichtung einschließlich einer Vakuumlampe
WO2013110511A1 (de) 2012-01-24 2013-08-01 Siemens Aktiengesellschaft Schaltgerät, insbesondere lasttrennschalter, für mittelspannungs-schaltanlagen
WO2014001029A1 (de) 2012-06-25 2014-01-03 Siemens Aktiengesellschaft Dreistellungslasttrennschalter für mittelspannungs-schaltanlagen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3060195A1 (fr) * 2016-12-14 2018-06-15 Schneider Electric Industries Sas Appareil de connexion electrique a derivation de coupure d'arc, et procede d'ouverture de cet appareil
US10818452B1 (en) 2018-08-30 2020-10-27 Robert Neal Hendrix Power outage isolation device
ES2888700A1 (es) * 2020-06-25 2022-01-05 Ormazabal Corporate Tech A I E Interruptor de corte en carga o de corrientes de cortocircuito

Also Published As

Publication number Publication date
CN106206147A (zh) 2016-12-07
FR3034251B1 (fr) 2017-04-28
CN106206147B (zh) 2020-03-10
EP3073504B1 (de) 2018-11-07
ES2709670T3 (es) 2019-04-17
FR3034251A1 (fr) 2016-09-30

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