EP1226596A1 - Appareil tripolaire a structure compacte pour stations electriques - Google Patents

Appareil tripolaire a structure compacte pour stations electriques

Info

Publication number
EP1226596A1
EP1226596A1 EP00979834A EP00979834A EP1226596A1 EP 1226596 A1 EP1226596 A1 EP 1226596A1 EP 00979834 A EP00979834 A EP 00979834A EP 00979834 A EP00979834 A EP 00979834A EP 1226596 A1 EP1226596 A1 EP 1226596A1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
pole apparatus
isolating device
feeder
pole
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
EP00979834A
Other languages
German (de)
English (en)
Other versions
EP1226596B1 (fr
Inventor
Alberto Vaghini
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.)
Grid Solutions SpA
Original Assignee
Vei Power Distribution SpA
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 Vei Power Distribution SpA filed Critical Vei Power Distribution SpA
Publication of EP1226596A1 publication Critical patent/EP1226596A1/fr
Application granted granted Critical
Publication of EP1226596B1 publication Critical patent/EP1226596B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H33/121—Load break switches
    • H01H33/122—Load break switches both breaker and sectionaliser being enclosed, e.g. in SF6-filled container
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H33/121—Load break switches
    • H01H33/125—Load break switches comprising a separate circuit breaker
    • 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
    • H01H9/02—Bases, casings, or covers
    • H01H2009/0292—Transparent window or opening, e.g. for allowing visual inspection of contact position or contact condition
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/003—Earthing switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/022—Details particular to three-phase 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
    • H01H33/60—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
    • H01H33/60—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
    • H01H33/6662—Operating arrangements using bistable electromagnetic actuators, e.g. linear polarised electromagnetic actuators

Definitions

  • the present invention refers to a compact- structure three-pole apparatus for electric stations, in particular medium-voltage ones.
  • the isolator and circuit-breaker devices present in medium-voltage electric stations comprise a circuit breaker which enables disconnection of the direct line for supplying the loads, a line-isolating switch, connected in series to the feeder, which enables physical interruption of the line (for instance, by means of a mechanical control from outside) after the circuit breaker has opened the circuit, so as to ensure physical separation of the power busbars from the devices set downstream therefrom, and an earthing switch which can be operated from outside and is able to connect the line directed to user loads in order to prevent further risks due, for example, to discharges or induced currents .
  • the movable parts which disconnect the live line and which thus give rise to the formation of an electric arc upon actuation mainly operate with msulat on m air and consequently are subject to more or less serious oxidation and degradation, according to the environmental conditions and may give rise to electric arcs.
  • the electric arc that is formed whenever these devices are operated also causes wearing-out of the contacts and degradation of the insulators on account of lonization phenomena.
  • the casing or switchboard that encloses known isolator and circuit-breaker devices has overall dimensions that it would be desirable to reduce.
  • m traditional apparatus only the circuit breaker works m vacuum conditions or m a protective gas (for example, SF) atmosphere, and hence the switchboard usually comprises three devices (two isolating switches and one circuit breaker) , with the inevitable consequences represented by considerable encumbrance m terms of the dimensions of the container and by the need for a large supply of gas for protecting all the devices .
  • a purpose of the present invention is therefore to overcome the problems mentioned above, and in particular to provide a three-pole device for electric stations which has an extremely compacr structure and is designed to enclose, within decidedly reduced overall dimensions as compared to the known art, whatever is normally contained in an electric switchboard with busbar section-disconnector device, circuit breaker and earthing switch.
  • Another purpose of the present invention is to provide a three-pole apparatus for electric stations which has a compact structure and will guarantee, for the devices present inside, a longer electrical service life as compared to the one achieved by traditional apparatus.
  • a further purpose of the present invention is to provide a compact-structure three-pole apparatus for electric stations, which is particularly reliable, effective and safe and will guarantee a limited wearing-out of the parts over time as compared to the known art .
  • Not the least important purpose of the present invention is to provide a three-pole apparatus for electric stations affording contained costs by virtue of the advantages achieved and without requiring the use of complex or particularly costly technologies .
  • this type of compact apparatus with stainless steel casing encloses practically whatever is contained in an electric panel or switchboard, with an isolating switch, circuit breaker and earthing switch.
  • the isolating device which functions as line/earth changeover switch, is set in an environment protected by gas, in particular sulphur hexafluoride (SF-), which also performs the dielectric function for the conductors located inside the casing itself.
  • gas in particular sulphur hexafluoride (SF-), which also performs the dielectric function for the conductors located inside the casing itself.
  • a vacuum circuit breaker which is placed downstream of the isolating device, enables its use both as a line circuit breaker for protecting the line and as an earthing switch with closing capability.
  • the solution of using the vacuum circuit breaker for protecting the line or for earthing the cable means that a very low pressure of the SF ⁇ gas can be used in the container (approximately 0.1 bar) .
  • the gas has the sole function of guaranteeing the dielectric shielding and stability of the internal components.
  • the extremely small amount of SF- gas used in the apparatus which never comes into contact with the electric arc, maintains its properties intact over time, thus ensuring a longer electrical service life as compared to an SF ⁇ -gas circuit breaker or a circuit breaker of an air/vacuum type.
  • An apparatus having decidedly reduced overall dimensions as compared to similar known apparatus, and one in which all those parts that are involved in the interruption of electric current and that, at the moment of actuation, generate an electric arc are sealed in a vacuum envelope in such a way that the protective gas does not undergo any degradation by contact with the electric arc, with consequent greater durability of the apparatus .
  • the movable parts which are operated once power supply is interrupted, are protected in a gas atmosphere, and this enables elimination of the phenomena of degradation of the conductors and insulators.
  • the configuration adopted makes it possible to eliminate an isolating device because the very function of the earthing switch is implemented m the busbar section- disconnector/changeover switch. In this way, a drastic reduction is obtained m the overall dimensions of the entire apparatus.
  • FIG. 1 is a front schematic view of a compact-structure three-pole apparatus for electric stations according to the present invention
  • - Figure 2 is a perspective view of an isolating device installed inside the three-pole apparatus of Figure 1;
  • FIG. 3 is a schematic longitudinal cross- sectional view of the isolating device of Figure 2 m the circuit-opening position;
  • FIG. 4 is a schematic longitudinal cross- sectional view of the isolating device of Figure 2 m the circuit-closing position;
  • Figure 5 is a partial and partially sectional schematic view of the isolating device of
  • FIG. 6 shows a front view of a permanent- magnet actuator which is connected to a vacuum circuit breaker installed inside the three-pole apparatus of Figure 1 according to the present invention.
  • Figure 7 a schematic longitudinal cross- sectional view of the actuator of Figure 6.
  • the number 20 designates a protective metal casing of the three-pole apparatus according to the present invention, usable m medium-voltage
  • MV distribution systems for electric stations, m particular of a primary type.
  • medium voltage is meant m general a voltage that may be derived from the remote transformation of a high-voltage line, the said medium voltage being of the order of 10-20 kV, and m any case within the 1 kV to 52 kV range.
  • the casing 20 has a substantially parallelepipedal shape with vertical development and usually comprises three areas arranged transversely, and, m particular, at least one first, bottom, area 21, which houses the circuit-breaker and isolator devices of the apparatus according to the invention, a second, intermediate, area 22, where the power busbars are arranged to which the outputs to the loads are to be connected, and a top area 23, which has inside a number of compartments and service lines.
  • the bottom area 21 comprises, at the front, at least one door 24, hinged at the side, which has a first plate 25 identifying the electric line, a plate 26 representing the electric wiring diagram of the apparatus, and possibly a window which may be used by the user for viewing directly the position of the busbar section disconnectors and the earthing switch.
  • the said busbar section- disconnector and earthing-switch device 2 is movable between one position, in which it connects the circuit breaker 3 to an electrical contact 5 connected to the medium-voltage or high-voltage feeder 6 ( Figure 4), and a position in which the circuit breaker 3 is connected to an earth contact 7.
  • the output of the circuit breaker 3 is connected to the line directed to the loads by means of the contacts 8.
  • the busbar section-disconnector and earthing-switch device 2 and the vacuum circuit breaker 3 may be operated from outside by means of controls which act on the manoeuvring shafts 9 and 10 respectively of the isolating switch and of the circuit breaker.
  • the vacuum circuit breaker 3 may be equipped with mechanical control devices, such as levers and springs, or permanent-magnet devices, and in particular may include controls operated by springs with energy reserve, with or without motor and opening and closing coil, or else permanent-magnet controls (such as the one represented in Figures 6 and 7) used with opening and closing coil.
  • mechanical control devices such as levers and springs, or permanent-magnet devices
  • permanent-magnet devices such as the one represented in Figures 6 and 7
  • the interchangeability of the controls means that various requirements and specifications regarding opening times, closing times and electrical-life times may be met.
  • the permanent-magnet actuator, designated by 12 in Figure 6, has been developed to optimize the features of vacuum circuit breakers 3 for voltages of up to 36 kV; its operating characteristics, force and speed of opening and closing approach very closely those of the vacuum circuit breaker 3.
  • the magnetic actuator 12 may work within a force range of between 1000 N and 13000 N in order to meet the requirements of the circuit breaker 3.
  • the magnetic actuator 12 requires a very limited supply of energy and, in order to carry out operations of opening and closing, a current pulse having a maximum duration of 100 s is sufficient. Normally, to carry out an opening operation, 30 ms are sufficient, whereas for a closing operation 50 ms are sufficient.
  • the magnetic actuator 12 comprises a solid reinforcement 13, made of solid steel, designed to increase the characteristics of the welding, a screen 32 for shielding the magnet from the reinforcement 13, at least one magnet 33 designed to supply the closing and opening force, a section 44 made of rolled iron, designed to reduce the current losses and improve the operating times, a set of coils 55, which supply the manoeuvring energy in each direction, a manoeuvring lever 66 for connection to the lever mechanisms of the circuit breaker 3, an auxiliary lever 77 for connection to the manual operating cam and to the auxiliary contacts, and a set of blocking supports 68 designed to guide the control.
  • the apparatus according to the present invention has been developed to increase the safety of the compartment, to facilitate commissioning manoeuvres, and to reduce the overall dimensions and the weight with respect to the dimensions and the weight of the compartments that are built using traditional technologies and that contain a busbar section-disconnector device, an earthing switch and a circuit breaker which are physically separate from one another.
  • the circuit breaker 3 is operated for opening the circuit by acting, for example, on a manual control 10.
  • the control 9 to open the isolating device 2 on the line contact 5 and bring it to close on the earth contact 7 ( Figure 3) .
  • the circuit breaker 3 is operated again to close the circuit, so connecting to earth 7 the line 8 leading to the load in order to be able to proceed to opening the cable compartment and enable execution of the required maintenance operations.
  • the circuit breaker 3 is first operated to open the circuit; next, the busbar section-disconnector and earthing switch device 2 is changed over onto the line contact 5, and then the circuit breaker 3 is operated to close the circuit.
  • the positions of the isolating device 2 and the circuit breaker 3 may be as follows : circuit breaker 3 in the circuit-closed position with the busbar section-disconnector device 2 in the closing position on the busbar contact 5 (switchboard in use); circuit-breaker 3 in the circuit-open position with the busbar section-disconnector device 2 in the closing position on the earth contact 7 (intermediate position) ; circuit breaker 3 in the circuit-closed position with the busbar section-disconnector device 2 in the closing position on the earth contact 7 (switchboard not in use and possibility of gaining access to the internal devices for maintenance or replacement of parts).
  • control of the apparatus operates with two separate and mechanically interlocked shafts, one for the line/earth selector (represented by the controls 9 and 10) and one for the vacuum circuit breaker 3.
  • the mechanical interlock located on the manoeuvring shafts enables operation only in the correct sequence, unlike what takes place in compartments built using traditional technology, i.e., where the circuit breaker is separate from the isolating switch and the interlock between the two is performed by means of a key blocking mechanism.
  • a panel for containing the apparatus is as a whole obtained, which presents an overall width ranging between 375 mm and 750 mm and a depth of 900 mm, whereas at present the overall dimensions of a traditional panel with circuit breaker are 750 mm (width) by 1150 mm (depth) . Furthermore, the weight of the panel is reduced to approximately 40-70% of a conventional panel.
  • the advantages are the following: overall dimensions that are modest and smaller than those of known switchboards, given that the earthing switch is eliminated (its function being performed by the busbar section- disconnector and earthing-switch device designated by 2 in the Figures) , whilst the remaining devices are incorporated within an insulator in a protective-gas atmosphere, and the movable parts designed for interrupting the load or the short- circuit are sealed inside a vacuum envelope; - use of the protective gas only for electrical-insulation functions (the gas is kept in a state of slight overpressure, for example 0.1 bar, with respect to the environment) ;

Abstract

L'invention concerne un appareil tripolaire à structure compacte pour stations électriques moyenne tension. Cet appareil comprend un boîtier métallique (33) contenant tous les éléments que l'on trouve en pratique dans un tableau de contrôle, à savoir un sectionneur de barre omnibus, un disjoncteur à vide et un sectionneur de terre. Un sectionneur d'isolement (2) fonctionnant comme un commutateur ligne/terre est placé dans un environnement protégé avec du gaz SF6, un disjoncteur à vide (3) placé en aval dudit sectionneur d'isolement (2) permettant l'utilisation de ce dernier à la fois comme interrupteur pour protéger la ligne et comme sectionneur de terre à capacité de fermeture.
EP00979834A 1999-11-03 2000-11-02 Appareil tripolaire a structure compacte pour stations electriques Expired - Lifetime EP1226596B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT1999PC000038A IT1309626B1 (it) 1999-11-03 1999-11-03 Dispositivo di sezionamento e interruzione, per cabine elettriche.
ITPC990038 1999-11-03
PCT/IB2000/001777 WO2001033593A1 (fr) 1999-11-03 2000-11-02 Appareil tripolaire a structure compacte pour stations electriques

Publications (2)

Publication Number Publication Date
EP1226596A1 true EP1226596A1 (fr) 2002-07-31
EP1226596B1 EP1226596B1 (fr) 2003-01-29

Family

ID=11389386

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00979834A Expired - Lifetime EP1226596B1 (fr) 1999-11-03 2000-11-02 Appareil tripolaire a structure compacte pour stations electriques

Country Status (8)

Country Link
EP (1) EP1226596B1 (fr)
AT (1) ATE232012T1 (fr)
AU (1) AU1721501A (fr)
DE (1) DE60001334T2 (fr)
ES (1) ES2190993T3 (fr)
IT (1) IT1309626B1 (fr)
PT (1) PT1226596E (fr)
WO (1) WO2001033593A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1538650A2 (fr) * 2003-12-02 2005-06-08 VEI Power Distribution S.p.A. Sectionneur/disjoncteur pour sous-stations électriques
US7211761B2 (en) 2004-09-07 2007-05-01 Vei Power Distribution S.P.A. Switch and disconnector apparatus for electric substations
EP1845540A2 (fr) * 2006-04-12 2007-10-17 AREVA Energietechnik GmbH Interrupteur à trois positions en particulier pour appareillage de commutation à moyenne ou haute tension
US7777150B2 (en) 2006-11-10 2010-08-17 Vei T&D S.R.L. Three-pole apparatus for a medium or high voltage cubicle and associated cubicle comprising such a three-pole apparatus
IT202200006536A1 (it) 2022-04-01 2023-10-01 Boffetti S P A Gruppo di caricamento di un interruttore di un quadro elettrico
EP4254458A1 (fr) 2022-04-01 2023-10-04 Boffetti S.p.A. Groupe commutateur-déconnecteur de taille réduite

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Publication number Priority date Publication date Assignee Title
ES2630405T3 (es) * 2006-11-30 2017-08-21 Abb Schweiz Ag Interruptor seccionador de media tensión aislado con gas
DE102007038898B3 (de) * 2007-08-13 2008-11-20 Siemens Ag Schalteranordnung für eine Schaltanlage
US8410389B2 (en) * 2009-12-29 2013-04-02 Schneider Electric USA, Inc. Remote drive for disconnector/isolator used in switchgear
CN102231486B (zh) * 2011-06-17 2013-12-18 山东新科特电气有限公司 手车式永磁组合断路装置
CN103178466A (zh) * 2011-12-23 2013-06-26 青岛特锐德电气股份有限公司 组合开关电器气室
ES2770800T3 (es) * 2012-03-15 2020-07-03 Siemens Ag Dispositivo de conmutación, en particular un interruptor seccionador de cargas
EP2645378B1 (fr) * 2012-03-26 2014-10-08 ABB Technology AG Dispositif électrique avec isolateurs
EP2645395B1 (fr) * 2012-03-26 2014-11-12 ABB Technology AG Dispositif de commutation électrique et appareil électrique s'y rapportant
CN103377849B (zh) * 2012-04-28 2016-08-17 西门子公司 三相共箱隔离接地开关
GB2521135B (en) * 2013-12-10 2017-01-18 Tavrida Electric Holding Ag Switching apparatus for electrical power systems
PL73334Y1 (pl) 2021-10-07 2024-02-05 Zpue Spolka Akcyjna Zespół wyłączniko-odłączniko-uziemnika
IT202200006548A1 (it) * 2022-04-01 2023-10-01 Boffetti S P A Quadro di distribuzione di energia elettrica trifase
EP4254456A1 (fr) 2022-04-01 2023-10-04 Boffetti S.p.A. Tableau de distribution d'elctricité triphasée

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FR2650911B1 (fr) * 1989-08-09 1991-10-04 Alsthom Gec Disjoncteur a moyenne tension
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1538650A2 (fr) * 2003-12-02 2005-06-08 VEI Power Distribution S.p.A. Sectionneur/disjoncteur pour sous-stations électriques
EP1538650A3 (fr) * 2003-12-02 2005-06-15 VEI Power Distribution S.p.A. Sectionneur/disjoncteur pour sous-stations électriques
US7091439B2 (en) 2003-12-02 2006-08-15 Vei Power Distribution, S.P.A. Isolator/circuit-breaker device for electric substations
US7211761B2 (en) 2004-09-07 2007-05-01 Vei Power Distribution S.P.A. Switch and disconnector apparatus for electric substations
EP1845540A2 (fr) * 2006-04-12 2007-10-17 AREVA Energietechnik GmbH Interrupteur à trois positions en particulier pour appareillage de commutation à moyenne ou haute tension
EP1845540A3 (fr) * 2006-04-12 2008-05-14 AREVA Energietechnik GmbH Interrupteur à trois positions en particulier pour appareillage de commutation à moyenne ou haute tension
US7777150B2 (en) 2006-11-10 2010-08-17 Vei T&D S.R.L. Three-pole apparatus for a medium or high voltage cubicle and associated cubicle comprising such a three-pole apparatus
IT202200006536A1 (it) 2022-04-01 2023-10-01 Boffetti S P A Gruppo di caricamento di un interruttore di un quadro elettrico
EP4254455A1 (fr) 2022-04-01 2023-10-04 Boffetti S.p.A. Ensemble de réarmement d'un commutateur d'un tableau de distribution électrique
EP4254458A1 (fr) 2022-04-01 2023-10-04 Boffetti S.p.A. Groupe commutateur-déconnecteur de taille réduite

Also Published As

Publication number Publication date
AU1721501A (en) 2001-05-14
ITPC990038A1 (it) 2001-05-03
DE60001334D1 (de) 2003-03-06
IT1309626B1 (it) 2002-01-30
WO2001033593A1 (fr) 2001-05-10
EP1226596B1 (fr) 2003-01-29
ATE232012T1 (de) 2003-02-15
ES2190993T3 (es) 2003-09-01
PT1226596E (pt) 2003-06-30
ITPC990038A0 (it) 1999-11-03
DE60001334T2 (de) 2004-03-25

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