EP2575154A1 - Zelle zur Verteilung von Strom mittlerer Spannung - Google Patents

Zelle zur Verteilung von Strom mittlerer Spannung Download PDF

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Publication number
EP2575154A1
EP2575154A1 EP12306077A EP12306077A EP2575154A1 EP 2575154 A1 EP2575154 A1 EP 2575154A1 EP 12306077 A EP12306077 A EP 12306077A EP 12306077 A EP12306077 A EP 12306077A EP 2575154 A1 EP2575154 A1 EP 2575154A1
Authority
EP
European Patent Office
Prior art keywords
cell
current
electrical distribution
cell according
disconnector
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
EP12306077A
Other languages
English (en)
French (fr)
Other versions
EP2575154B1 (de
Inventor
Christophe Preve
Jean-Pierre Kersusan
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
Original Assignee
Schneider Electric Industries SAS
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 Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP2575154A1 publication Critical patent/EP2575154A1/de
Application granted granted Critical
Publication of EP2575154B1 publication Critical patent/EP2575154B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H33/60—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
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/02—Details
    • H01H31/04—Interlocking mechanisms
    • H01H31/10—Interlocking mechanisms for interlocking two or more 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
    • H01H33/14—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
    • 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
    • H01H33/14—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
    • H01H33/143—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc of different construction or type
    • 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
    • H01H33/16—Impedances connected with contacts
    • 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
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches

Definitions

  • the present invention relates to a medium voltage electrical distribution cell intended to be interposed between two parts of an electrical circuit so as to ensure at least the function of current flow between the parts, and cut-off of the current in the event of an electrical fault.
  • an electrical distribution cell of the kind mentioned above, as described in the patent application is known.
  • FR 2 940 516 This cell includes a switch or a circuit breaker also performing the disconnector function and, in series with this switch (or circuit breaker) a selector at least two positions respectively a current passage position and a grounding position.
  • This cell is designed to conduct a current of 630 A and is therefore not able to conduct higher current levels, such as 1250 A.
  • these cells that can withstand a higher nominal current than the mid-range generally correspond within a range with low consumption volumes, which means that the industrial costs of such an adaptation are not justified.
  • the present invention solves these problems and proposes a simple and economical electrical distribution cell that can withstand a large nominal current without considerably increasing the necessary investments and the number of subsets made.
  • the subject of the present invention is a medium-voltage electrical distribution cell of the kind mentioned above, this cell being characterized in that it comprises a first cell dedicated to the breaking of the current and to the establishment of the current, this cell comprising electrical protection means having the performance of current breaking and closing, and a second cell dedicated to the passage of the nominal current comprising means for conduction of the nominal current and also of the short-circuit current before the phase of cut by the aforementioned protection means, and circuit severing means, the second cell being dimensioned to drive high nominal currents, said disconnector being controlled by the aforementioned electrical protection means.
  • the first cell is adapted to conduct up to at least a first current value, while the second cell is sized to conduct at least the entire value of the nominal current minus the first current value mentioned above.
  • the protection means of the first cell comprise a circuit breaker or a switch and the means of conduction and sectioning of the second cell comprise a disconnector or a switch at least two positions.
  • the control mechanism of the circuit breaker controls the opening of the contacts of the disconnector, the contacts of the circuit breaker or the switch then opening with a certain delay, allowing the current to completely switch in the first branch before their separation, then the contacts of the circuit breaker open and remain open for the duration of the cut-off, during which the disconnector contacts continue to open, and during a closing maneuver, the contacts of the circuit breaker close first to establish the current in this so-called first cell, thus closing the protection circuit then, with a certain offset of time, the shut-off circuit being closed, the mechanism of the circuit breaker controls the closing of the contacts of the disconnector.
  • the second cell comprises means for reducing the heating in said second cell.
  • this cell comprises means for distributing the currents flowing respectively in the two cells.
  • these means comprise means for increasing the impedance of the first cell.
  • these means comprise a magnetic circuit placed in the first cell so as to increase its inductance.
  • these means comprise, wound on the magnetic circuit, a winding closed on a resistor, an impedance or said winding itself, said magnetic circuit being placed around a shielded connecting conductor downstream of the two cells.
  • these means comprise at least one pair comprising two balancing transformers respectively placed on two phases respectively belonging to the two cells, these two transformers each pair being electrically connected two by two by one of their secondary.
  • connection interfaces to cables are electrically connected only to the so-called second cell, in order to increase the impedance on the so-called first cell.
  • the lower link opposite the busbar, is designed so as to have a small section and / or have forms to increase its inductance, such as helical shapes.
  • an inductance is added to a dedicated secondary protection current transformers of the so-called first cell so as to increase its impedance and thus limit its current to a small proportion of the nominal current to conduct.
  • the mechanical control device of the disconnector is removed and in that it is directly controlled from the output shaft of the control device of the circuit breaker.
  • control devices respectively of the circuit breaker and the disconnector are interlocked.
  • the circuit breaker comprises a vacuum interrupter to perform the power failure.
  • the mechanism of the circuit breaker controls both the moving contact of the bulb and the contacts of the disconnector.
  • this cell comprises several so-called second cells equipped with disconnectors and making it possible to distribute a larger nominal current, the output shafts of which are mechanically connected to each other, the nominal current being distributed in these different cells.
  • this cell comprises current balancing means, grouped two by two on pairs of neighboring cells.
  • this cell is an arrival cell disposed at the end of an array, an arrival cell disposed in the middle of an array, or a coupling or counting cell.
  • this cell is intended to conduct a current of 1250A, the first and second cells being sized to each conduct a current of 630A.
  • the circuit breaker / switch is in vacuum breaking technology also performing the disconnector function.
  • a medium voltage electrical distribution cell C intended to electrically connect two busbars 1, 2 and to drive a high nominal current, for example in this particular embodiment, a current of 1250 A. , from "standard" cells of lower nominal currents.
  • This cell C is intended to provide several functions, which are, respectively, to allow the passage of current between the busbars 1,2, to achieve an interruption of the current due to the cut made by a circuit breaker following the occurrence of a electrical fault in the circuit, which may occur for example during the protection of the network during a short circuit appeared in the latter, and to perform a sectioning of the circuit for independent operation of the two parts of the network.
  • this cell C comprises two branches or cells a, b arranged in parallel.
  • the first cell comprises a circuit breaker 3 comprising a vacuum interrupter 13 in series with an earthing switch 4, while the second cell b comprises a bar bridge 5 constituted by a copper conductor in series with a disconnector 6. .
  • the first cell a has performance in cutoff and closure but does not allow to drive a high nominal current
  • the second cell b is a cell for driving a high nominal current but has no power cutoff and closure.
  • These two cells a, b are electrically connected in the upper part to a busbar of the upper table, and in the lower part to a lower busbar. These two cells a, b are electrically connected from a downstream side to a busbar of the board, and the other side said upstream to a coupling link located before the connections to the network cables.
  • this second cell b is a cell identical to the first one to which the circuit breaker has been removed, which has been replaced by a rod-shaped shielded overmolded conductor 5, so as to reduce the heating of the cell, especially when this circuit breaker has a vacuum bulb.
  • each of these cells a, b said low nominal current can be intended to conduct a current of 630A, while the cell made according to the invention constituted by the union of the two cells, allows to hold a nominal current of 1250A.
  • this cell according to the invention for holding a high permanent current, is formed from two existing cells adapted to maintain a low nominal current, which makes it possible to rationalize the manufacture of such high nominal current cells.
  • the upstream and downstream busbars will be adapted to conduct a permanent current of 1250A, or 630A depending on the location of this cell in the table and the balancing or distribution of currents referred to in each branch.
  • the mechanism of the circuit breaker 3 of the first branch a, as well as the disconnector 6 of the second branch b are mechanically connected to operate according to a particular sequencing, as will be explained later.
  • this cell C according to the invention is an arrival cell located at the end of the table.
  • this cell C is arranged in the middle of the table. And on the figure 4 this cell is used to make a coupling and counting cell.
  • the current carried by the downstream busbar 1 will be distributed in all branches.
  • means are provided for distributing this current in such a way that the nominal current is higher in the second branch b, or the second branches b, c, d intended to conduct a current. nominal high.
  • These means may be to increase the impedance in the first cell a having the circuit breaker 3 to reduce the nominal current therethrough and switch all this current or a large part thereof in the disconnector cell 6 which can easily perform this function of keep a high rated current.
  • these means comprise, for example, a magnetic circuit 7 placed around a conductor participating in the impedance of the cell a comprising the circuit breaker 3.
  • This magnetic circuit may also comprise a winding 9 closed on a resistor 10, an impedance, or the winding itself.
  • the current is distributed in the two branches a, b by means of balancing current transformers 11,12 connected-wired at their secondary.
  • the circuit breaker that controls the opening and closing of the disconnector.
  • the mechanism of the circuit breaker 3 and the mechanism of the disconnector 6 are kinematically connected by mechanical connection means L, so that these two devices operate in a certain sequence.
  • the circuit breaker 3 opens the contacts of the disconnector 6 by coupling the mechanism of the circuit breaker to the disconnector mechanism, the contacts of the bulb 13 opening with a certain delay.
  • the opening of the contacts of the bulb realizes the opening of the cut-off circuit.
  • the bulb remains open for the duration of the break, the recovery voltage being held across the disconnector 6 and the bulb 13.
  • the disconnector 6 of the second cell (s) is controlled from the mechanism of the first cell by means of a mechanical connection connecting the output shaft of the control mechanism. from the circuit breaker to the moving part of the disconnector, the control mechanism of the disconnector having been removed.
  • the two control mechanisms can be kept and interlocked.
  • the mechanical connection between the two mechanisms allows a rapid maneuver of the switchgear of the switch of the second cell during the decompression of the closing springs of the circuit breaker bulb.
  • the table thus produced is adapted to carry a current of 1250A, its busbar being dimensioned for 1250A and the lower or upper coupling bars being adapted to conduct a current of 1250A or a current of 630A, according to the configuration of the board.
  • the disconnector must not interrupt or turn on the power because it does not have these two performances. It can just support a short arc for switching the current to be cut.
  • Another solution for decreasing the value of the current in the branch a could therefore consist in connecting the connection means to the other cell, the one which must receive the highest current.
  • the lower link opposite to the busbar, could be designed of small section and / or include forms increasing its inductance. For example helical shapes.
  • Another solution could also be to add balancing current transformers on the two branches and cabled in opposition.
  • circuit breaker cell with a very small section of copper, at least over a certain portion of its circuit, the isolating cell being sized to hold the permanent current and its section to be calculated so as to hold the current short circuit during the current switching time (a few ms) on opening.
  • the present invention therefore proposes to perform a combination of cells based on the paralleling of a cell, called the nominal current, intended to conduct the nominal current, and a so-called control-protection cell, intended to perform the control functions. and electrical protection.
  • This nominal current cell will only see part of this rated current and will never have to cut or establish it.
  • the "control-protection” cell will see only a part of the nominal current, but above all will have to cut and establish all types of current.
  • the so-called “nominal current” cell includes a disconnector while the cell called “protection -command” has a circuit breaker. It is the control mechanism of the circuit breaker that operates in direct contact with the circuit breaker contacts and at the same time the contacts of the disconnector.
  • the location of the vacuum interrupter will receive a shielded over-molded conductor including at these ends the connection interfaces (busbar side and disconnect side). This replacement of the bulb reduces the heating of this cell, which will pass a higher current by increasing the impedance of the first cell relative to the second.
  • the invention therefore makes it possible to considerably increase the value of the nominal current that a cell can conduct from existing cells or existing subsets.
  • the nominal current be chosen by suitably dimensioning the isolator of the second cell, but the value of this current may also be modified by multiplying the number of so-called second cells in parallel with the so-called first cell.
  • the cell created according to the invention may advantageously be modular, the value of the nominal current can be adapted to the demand by adding modules for sectioning and passage of the nominal current, which will be mounted in parallel with the other cells.
  • the present invention therefore extends to any device putting in parallel a circuit breaker cell and a disconnector cell, this disconnector being sized to adapt to the various nominal currents that it is necessary to drive.
  • the connection inserts can for example be sized to adapt to the maximum current to be distributed, and the disconnecting knives, modular design, can be duplicated as needed.
  • the electrical protection device may be a circuit breaker or a switch with or without a vacuum bulb.

Landscapes

  • Gas-Insulated Switchgears (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Patch Boards (AREA)
  • Distribution Board (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP12306077.4A 2011-09-27 2012-09-07 Zelle zur Verteilung von Strom mittlerer Spannung Active EP2575154B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1102931A FR2980634B1 (fr) 2011-09-27 2011-09-27 Cellule de distribution electrique moyenne tension

Publications (2)

Publication Number Publication Date
EP2575154A1 true EP2575154A1 (de) 2013-04-03
EP2575154B1 EP2575154B1 (de) 2015-07-29

Family

ID=46800147

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12306077.4A Active EP2575154B1 (de) 2011-09-27 2012-09-07 Zelle zur Verteilung von Strom mittlerer Spannung

Country Status (4)

Country Link
EP (1) EP2575154B1 (de)
CN (1) CN103022908B (de)
ES (1) ES2547343T3 (de)
FR (1) FR2980634B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3021159B1 (fr) * 2014-05-15 2016-05-06 Schneider Electric Ind Sas Appareillage de coupure electrique moyenne tension utilisant la technique de coupure dans le vide

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999052120A1 (de) * 1998-04-08 1999-10-14 Siemens Aktiengesellschaft Hochstromschalter, insbesondere generator-leistungsschalter
US20040074875A1 (en) * 2000-01-11 2004-04-22 Hitachi, Ltd . Power use circuit breaker and electrical circuit arrangement for electric power generation plant
EP1693873A2 (de) * 2005-02-22 2006-08-23 Hitachi, Ltd. Vakuumschaltgerät
FR2940516A1 (fr) 2008-12-18 2010-06-25 Schneider Electric Ind Sas Cellule de distribution electrique moyenne tension

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3642108A1 (de) * 1986-12-10 1988-06-16 Bbc Brown Boveri & Cie Schaltanlage zur verteilung elektrischer energie und verfahren zum betreiben der schaltanlage
CN101908435B (zh) * 2010-08-05 2012-12-19 西安通大思源电器有限公司 一种永磁操动的真空断路器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999052120A1 (de) * 1998-04-08 1999-10-14 Siemens Aktiengesellschaft Hochstromschalter, insbesondere generator-leistungsschalter
US20040074875A1 (en) * 2000-01-11 2004-04-22 Hitachi, Ltd . Power use circuit breaker and electrical circuit arrangement for electric power generation plant
EP1693873A2 (de) * 2005-02-22 2006-08-23 Hitachi, Ltd. Vakuumschaltgerät
FR2940516A1 (fr) 2008-12-18 2010-06-25 Schneider Electric Ind Sas Cellule de distribution electrique moyenne tension

Also Published As

Publication number Publication date
CN103022908B (zh) 2017-05-31
FR2980634A1 (fr) 2013-03-29
ES2547343T3 (es) 2015-10-05
EP2575154B1 (de) 2015-07-29
FR2980634B1 (fr) 2013-09-06
CN103022908A (zh) 2013-04-03

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